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E&C Page(s): lof1

NOI BAI - LAO CAI HIGHWAY PROJECT (PACKAGE A2)

IENCLOSURE(S):

Quantity

Engineer | Employer] Nets

Unit

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ate

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OOSCO ©&C NOI BAI ~ LAO CAI HIGHWAY PROJECT

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Pesce Method Statement for Sand Drains

Noi bai Lao cai Highway Project

Site Organization Chart

Construction Equipments and Field Control Devices

5.1 Main Machine

5.1.1 Option 1: Crane with Leader Supported by a Frame

5.1.2 Option 2: Specialized sand column driving system

8.2 Key of Quality Control

Construction in Rainy Season

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oseo Method Statement for Sand Drains

Noi bai Lao cai Highway Project POSA2-MS-SD-AI-EN

Package A2: Km 26+700~Km48+820

1 General

This method statement describes the soil improvement using Sand Drain

Operation System that works by installing sand pillars into soft ground at desired

locations The technique involves driving closed-bottom casings into the soft soil using either Static Driving or Dynamic Driving according to soft soil conditions

When the casings reach the required depth, they are then filled with sand The bottom of casings are then opened and the casings withdrawn leaving the sand

pillars A load is then imposed on top of the sand pillars to remove water through

sand drains and consolidate the soft ground This method statement covers the items

as shown below;

(1) Method of Construction

(2) Method of Quality Control

List of documents to be submitted separately;

improvement works shall be carried out

Sand Drain installation is approximately 85,254.20m, covering an area of

18,311.03m’ The installation pattern of sand drain is 1.5m apart both ways having varying depth as shown in the working drawing plan

However, Sand Drain installation length maybe decreased or increased according to the site conditions and the requirements from contractor and client

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Osco

pP E&C

4 Site Organization Chart

Organization Chart is as follows;

Method Statement for Sand Drains

Nguyen Van Duc Thai Manh Hung

Tran Vinh Hung

Do Tran Trung Truong Van Duong

Soft Soil Treatment Sub-contractors

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Osco

p E&C Method Statement for Sand Drains

5.1.1 Option 1: Crane with Leader Supported by a Frame

The crane model that may be used are Sumitomo (LS108, LS118, LS120), Kobelco

The machine operates on two chain wheels and both are use for

releasing and shrinking

The capstan system included 3 hydraulic heavy lifting capstans; the

maximum load of each capstan is 15.8/ 15.8/ 5.0 Ton

The maximum lifting capacity: 55 ton /The lifting work capacity: 20

ton

The leader system: tube type with D580 x 8 mm, equipped with

vibro-hammer sliding line sized 70 x 330 in front, one side equipped with a service ladder line and other side equipped with sand cart sliding

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OSCO

" E&C Method Statement for Sand Drains

Noi bai Lao cai Highway Project POSA2-MS-SD-A1-EN

D408A — Nippon shayo or equivalent

The HINO HO6C motor: 110K W / 2000 r/m

The hydraulic capstan system: 7.5/ 7.5/ 2*3.5 ton

The maximum lifting capacity: 40 ton /The lifting work capacity: 20

ton

The Leader system: tube type with D580 x 8 mm, equipped with

vibro-hammer sliding line sized » 70 x 330 in front, one side equipped

with a service ladder line and other side equipped with sand cart sliding

line

Vibration hammer is a vibration equipment to reduce friction between steel tube case and earth while driving down and pulling up In addition, we use vibration hammer to avoid from arch in sand press and sand jam

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poseo Method Statement for Sand Drains

¢ Work Flow: 5.5m?/minute

s% The Max Pressure: 7 Pa/, work pressure: 5 Pa

5.4 Steel Pipe

Steel pipe is use to make the hole, prevent soil from entering the hole and receive

sand to form drainage The pipe head diameter is 430 mm and the pipe bottom is equipped with valve The valve is close when driving down and is open when extracting The pipe diameter is smaller for purpose to reduce friction The upper

part of the pipe is equipped with sand box and sand feed tank

5.5 Sand Bucket

Sand bucket receives sand from front-end loader, then be pulled up along the

leader line and then dump the sand to sand box The sand bucket capacity is

1.0-1.8m?

5.6 Loader:

“ Capacity: 119 HP/2200 r/m

Equipments’ model to use in reality may not be exactly as stated above but shall

be of equivalent capacity and specification

Construction Equipment

Nos Equipment Specifications | Unit |Quantity) Remarks

1 |Crane/ specialized pillar driving unit] 40/55 ton/UP Set 2 SD Installer

2 Generator 225 KW Set 1

3 Air Compressor 5m /min - 7bar | Set 2

4 Wheel Loader 1.7m? Set 2

5 Truck 10 tones No 4

6 Bulldozer 110 CV Class Set 2

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ĐOSCO

E&C

5.7 Field Control Devices

Method Statement for Sand Drains

Field Control Devices

|

Version Al, dated November 21, 2012

Page 7 of 24

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ĐOseo Method Statement for Sand Drains

The other materials to be constructed with sand drains are shown as follows:

Item Particular Unit Qty Remarks

1 Fine sand mÌ 42,776.61 | Back fill layer

4 Reinforcement geo-textile m 23,529.30 | 200KN/m woven

6 Graded Filter m° 17.50 Crushed stone 1x2

7 | Graded Filter m3 5.25 +“ Material

s4 ung a [ ana | arow Maver

principle is to form sand drain by pipe according to design depth and spacing, and

then fill it up with sand, and use air to compact the sand In Vietnam, this workmanship is used generally, especially in expressway construction The Contractor will use the air type for the sand drain The work includes site

preparation, supply of materials and instruments, sand filling, construction of

sand drains, construction embankment to design height, settlement observation and all other works required by the drawings

7.2 Reference Standard

“+ Standard of 22TCN 263-2000 by Vietnam Ministry of Transport;

*“ 22TCN262-2000 Procedure for Surveying and Design Embankments on Soft Ground

«+ AASHTO and ASTM standards for Laboratory;

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Equipment Assembly

wheel loader, truck, bulldozer, roller,

generator, air compressor

Fine Sand Backfilling, Separation Geo-textile Installation & Sand filling for

prior to large scale construction of sand drains

Construction of Sand Drains

Set out location of sand drain Set up sand drain equipment at installation point

Drive pipe into ground Fill up pipe casing with coarse sand Extract of pipe casing

Construction of next sand drain

dimension and height of the drains

length

depth & elevation

Inspections included trials

Reinforcement Geo-textile Installation and Sand

Filling for Sand Mat

crushed stone

Installation of Field Control Devices

settlement plate and alignment stakes

Embankment Material K95 Up to Compensated

Version Al, dated November 21, 2012 Page 9 of 24

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poseo Method Statement for Sand Drains

Noi bai Lao cai Highway Project POSA2-MS-SD-Al-EN

7.4 Construction Procedure

7.4.1 Site Preparation

7.4.1.1 Survey works and installation of instruments in dummy area

7.4.1.2 Site clearance Work site must be cleared and graded for equipment operation

7.4.1.3 The service roads shall be kept in good conditions for transportation of

equipment and materials

7.4.1.4 To set out locations of sand drains to be constructed and mark out

construction area, and use total station to locate center, side and other

drains according to Shop Drawings and dimensions

7.4.1.5.Around the construction site, effective drainage system must be

7.4.2.1 Each of the equipment and tools shall be deployed in the site;

7.4.2.2 Provide fuels and other oils for the equipment;

7.4.2.3 Assembly A frame, leader and main boom of the crane;

7.4.2.4 Erect power line;

7.4.2.5 Install air-compression system;

7.4.2.6 Check connection of parts and those of cables and air-compressors;

7.4.2.7 Check valves of the pipe and the air compressor, fuses and power

switches

7.4.2.8 Adjust verticality with lead line;

7.4.2.9 Commissioning

7.4.3 Fine Sand Backfilling, Separation Geo-textile Installation & Sand

Filling for Sand Mat 7.4.3.1 Install settlement plate, inclinometer

7.4.3.2 Fine sand backfilling Based on plan, fine sand backfilling ranges the

thickness from thickness from 0.6m to 3.3m See working drawing for more detail in every station

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POSES Method Statement for Sand Drains

7.4.3.3 Install separation geo-textile after fine sand backfilling The specified tensile

strength of separation geo-textile or non-woven geo-textile to be used is 12KN/m

Seperation goo-textle, tensile stengh 12d,

Lop vai đa kỹ thuật ngăn cách cường độ 1ã m —_ ụ

Sond for and mat Sm

‘Ldp db eft thodt rude 0.5m

s* To determine conversion coefficient between loose sand and

compacted sand through laboratory and site tests, to know difference

of materials between the actual construction and calculation;

For the convenience of observation, determine the volume conversion

coefficient between inner diameter of the pipe and diameter of the

sand drain

s* According to the designed length, and on the basis of optimum compaction degree, to determine theoretical and actual sand quantities to be filled

* To determine the observation parameter, to facilitate observation

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ĐOBCO Method Statement for Sand Drains

Noi bai Lao cai Highway Project POSA2-MS-SD-A4I-EN

Package 42: Km 26+700~Km48+820

7.4.4.2 Trial Driving

Trial Drain: KM44+080- KM44+175, a 95m-section of sand drain The

Contractor shall arrange a trial installation to demonstrate the

satisfaction of the equipment, method, materials

* Pipe Driving: Start equipment, place pipe, check pipe verticality with

lead line, check length of the pipe and drive the pipe with vibration hammer

Me

s* Determine Depth: Drive to the designated depth with vibration

hammer, check the designed and actual depths

L : Length of sand drain (m)

Ry : 1.3, (temporary conversion coefficient of sand in drain)

“Sand Filling: Use sand bucket to calculate and check the sand, then transport and fill up pipe with the sand, then, start air compression while vibrating, and extract the pipe at speed of 10s/m, then refill sand until the

calculated sand is used up After one drain is finished, the drain top shall be

remained at least 30cm~50cm higher than top driving level

v$

s* Record and Report on trial installation:

Major contents of Record form (for trial construction):

Depth/Chiêu sâu Sand | Time/Thời No./ | Pile no./ | Station/ | Date/ center/

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oseo Method Statement for Sand Drains

Report on trial construction shall be prepared and submitted by the Contractor to the Engineer for his comments or approval prior to large-scale construction

7.4.5.Construction of Sand Drains

“* Before construction, the Contractor will set out location of the center drain with coordinate system (refer to working drawing), and use steel ruler and total station to set out locations of sand drains one by one This work must be carried out in the day before construction

“* Equipment shall move follow a direction so as not run over the previous installed ones

CONSTRUCTION DIRECTION PLAN FOR SAND DRAIN INSTALLATION

SƠ DO HUONG DI CHUYEN CHO THI CONG GIENG CAT

Vài đa kỹ thuật gia cường (200AN} ni c6)

7.4.5.1.1 Move the equipment to required location, close pipe valve, use lead line

to check and adjust verticality of pipe

7.4.5.1.2 Driving Pipe: Open air valve at the bottom during driving pipe, open

quick valve from sand box The front-end loader dump sand to sand cart, continue driving down, when the pipe reaches the required depth , start sand cart to dump sand into sand feed tank, then continue to drive the

pipe to reach specified depth

7.4.5.1.3 Extracting pipe: When the pipe reaches the calculated depth, to fill with

sand for the second time until it reaches the calculated level, close quick valve and drain head air valve, then open air-pressing valve Air pressure

reaches 4-4.5 bar, and keep it, then, extract the pipe slowly while vibrating,

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on Method Statement for Sand Drains

or when every 0.5m is extracted, stop extracting, vibrate 20-30 seconds, or press the pipe down then extract it to compact fallen sand to the drain, and also extend the diameter of the drain, the vibration force shall be 30-70KN and can not be more, in order not to disturb the earth around, the

extraction speed shall be at 1-2m/min, when extracting pipe, the top of

sand drain shall be at least 30cm higher than the CSB bottom To extract the pipe completely, close all air valves, to remove the equipment to a new

location

7.4.5.1.4 If any blockage is found while driving pipe, it shall be reported to the

Engineer and drive within the area of 50cm, if it does not satisfy the design, ask advice of the Engineer and the Employer

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Ð TC) Method Statement for Sand Drains

7.4.5.2 Parameter Determination

7.4.5.2.1 Length of Steel Pipe:

The steel pipe length is based on equipment working platform level and designed drain head height

L=H1-H2+0.5 (m)

H1: Elevation of ground where the equipment stands (m) H2: Drain top elevation (m)

0.5m: Plus length

7.4.5.2.2 Diameter & Thickness of Steel Pipe:

Outer diameter of pipe head must be equivalent to that of designed sand drain, i.e., 430 mm (including thickness of pipe 15mm)

Diameter of steel pipe shall be equivalent to or less than that of the head, the latter is better, because it can reduce friction while driving

or extracting pipe The pipe shall be thick to secure stability and durability of the pipe, the thickness shall be 15 mm

7.4.5.2.3 Calculation of Sand Content for Drain,

L: Length of drain

w: Water content of sand( %);

e: Required void ratio after the base is compacted

7.4.5.2.4 Sand Length in Pipe:

Sand is run from sand cart to sand feed tank, then running down to steel pipe through one way automatic valve The length of sand in steel pipe is calculated as per volume (V) of sand vehicle,

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ÐOSbO Method Statement for Sand Drains

V: Volume of sand transporting vehicle(m’)

r : Inner diameter of steel pipe(m);

H : Length of sand in steel pipe

7.4.5.3 Sand Drain Length Inspection

According to above calculation, the Contractor will find the required length, and mark it on the pipe’s outer surface, drive pipe down, and it reaches to the required level when the mark reaches the site surface

Driving the steel tube to the calculated depth, then use steel ruler to measure the sand length inside the tube through sand feeding tank opened

valve Then, compare those two figures

7.4.5.4 Site Inspection

After completion of all processes, check the sand drain diameter and drain grid dimension, check 4 drains at random, for diameter, drain head shall be dug out, and then measure its diameter

7.4.5.5 Note:

strictly, sample and test report of the sand must be approved by the

Engineer before use

7.4.5.5.2 After one area is finished, the Contractor shall prepare report on the

work location, work time (from begin to end), sand drain quantity and

depth of each drain

K1: machine stop rate: kl = 0.7 -0.95

K2: work stop for drain difficulty, weather and other seasons affect to working process k2 = 0.8 -0.9 in dry season; k2 = 0.5-0.7 in rainy season 15: first 15 days for technical testing

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Posse Method Statement for Sand Drains

7.4.6 Reinforcement Geo-textile Installation and Sand Filling for Sand Mat

7.4.6.1 Reinforcement geo-textile installation The specified tensile strength of

reinforcement geo-textile or woven geo-textile to be used is 200KN/m

Install one layer from Station Km44+080~Km44+175 and two layers from

station Km44+175~K44+407

Reinforcement geo-extle, tensile svengih 200kNim

SAND DR) jmmg(0.0.) @1.5m_ PATTERN SQUARE /

L- _SANO DRAIN @I.§m SQUARE PATTERN,

7.4.6.2 Sand filling for sand mat with 0.3m thickness

Sand i for sand mat 0.3m

‘Lap dem eat thost nade 02m

Reinforcement geo-entle, tensile strength 2004Nin

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Posse Method Statement for Sand Drains

7.4.6.3 Install sand bags and graded filter-crushed stone 1x2

Sand fil for sand mat 0.3m_

_ a Lớp đệm cất thoát nước 0.3m

er Reinforcement geo-textile, tensile strength 200kN/m

See dol PINE Te ay ng eh eng 6 2008

“ Lớp đệm cát thoát nước 0.5m _ Seperation geo-texle, tensile strength †2kNim

Lop vải địa kỹ thuật ngăn cách cưỡng độ 12kNim

7.4.7 Field Control Devices

7.4.7.2 Installation of field control devices such as piezometer, observation

well, deep settlement plate and alignment stakes as shown below

Refer to working drawing for the locations

_ Sand fil for sand mat 0.3m _Z Tê đệm cét thoat nude 0.3m

Ạ SANG SETTLEMENT PLATE, ee xả ee “ Lớp vải địa kỹ thuật ngắn cách cường độ 200kNfm

\ Graded filter - Crush stone 1x2

DEEP § SETTLEMENT PLATE AT 3M BELOW GROUND LEVEL/ DEEP SETTLEMENT PLATE AT fat BELOW (GROUND LEVEL

bin do lin sBu,d8t Sm dul nn hen nen ‘Bind ling; 890m and

7.4.7.3 Daily Record Sand Drain construction shall be recorded daily by the Contractor

Copies of these records shall be submitted to the Engineer within two days after the placement Record format shall be subject to the

Engineer’s approval, it must show:

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POSsco Method Statement for Sand Drains

% The quantity of sand placed in each drain and ampere of

vibro-motor;

* Obstructions and delays;

“Number and type of tests carried out;

“Readings of installed instruments;

“Any unforeseen conditions encountered shall be noted briefly in the records;

7.4.8 Embankment Material K95 Up To Compensated Level

Sempeneated level aot BS

SAND DRAIN 430mms(0,0.) @1.5m PATTERN SQUARE,

GIENG CAT 430MM(0.D.) @2.5M BO TRÍ HÌNH VUÔNG

setdement (95 embankment mate

PIEZONETERREADOUTUNTT 6aoB§Thfifể `, ,dLj4-y —+ Sand filfor sand mat 0m

Reinforcement geo-textile, tensile strength 200kN/m

CHÍ TIẾT *A* CHỊ TIẾT *A*

‘Sand fill for sand mat | 08m Sand fill for sand 0.5m ree: Tp đệm cát thoát nước 0.5m Lớp đệm cất thoát nước 0.5m

Borrow material K95 Reinforcement geotetla, tense svength 200kNim Reinforcement geo-extle, tensile strength 200KNIm

Dap dat K95 ~~~ Lop vai dia kj thut ngn cach cuing độ 200kN/m Lp vãi địa kỹ thuật ngăn cách cutmg 49 200KNim

‘Seperation gao-tede, lensls sưength 12km

ˆ Lớp vải địa kỹ thuật ngăn cách cường độ 12kNlm

BackfI by soi afer fnishing settlement

` Lớp vải địa ký thuật ngăn cách cường độ 12kN/m

_Back fil by sol ater finishing set¥ement

‘Dao dat khong thich hop Đào đất không thích hợp

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posco Eác Method Statement for Sand Drains

8.1.1 Personal Security: Experienced technical staff will be assigned to the key

positions;

8.1.2 Technical Security: Review of the detailed drawings and proposal of

construction Try to promote new technology, technique and material Test will be properly conducted and specification shall be strictly observed

8.1.3 Material Security: All construction materials will be subject to related tests to

satisfy the related requirements

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Osco

E&C Method Statement for Sand Drains

8.1.4 Mechanical Security: keep them well maintained and repair regularly During

8.2

construction, no equipment or equipment shall be mobilized out of site so as

to satisfy the construction

Keys of Quality Control

8.2.1 Seriously, carefully and strictly record the site original drain construction and

fill out original record forms, and timely submit them to the Engineer for approval and signature, and avoid shortage of drain

8.2.2 Select driver, hammer and A-frame according to required depth of the drains

in the soil, and performance of sand drain shall be paid high attention to, all materials for the drain shall be inspected according to the design requirement Only when they satisfies construction requirement, the materials can be transported to the site

8.2.3 During the course of drain construction, the Contractor will often use lead

line horizontal rule to check verticality of drain wall, to avoid inclined wall

Constant load vibration and pressing method shall be used during driving

Each drain shall be driven continuously and in one time until it’s formed

8.2.4 If any detrimental conditions during the course of construction, it shall be

reported to the Engineer timely, and shall be solved by technical persons

9 Construction in Rainy Season

To establish construction measures in rain days and emergency plan Related departments should carry out site inspection to make sure any problem to be

To strengthen maintenance of dike or embankment to avoid collapse;

To make the drains properly to avoid any drainage accident;

To collect weather information in advance and take precaution measures;

During soft soil treatment, the groundwater shall be lowed as low as possible and remove surface water

Temporary access road shall be maintained and make sure proper drainage to provide good access condition All the vehicles shall be maintained to ensure its work safety

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Osco

p E&C Method Statement for Sand Drains

Implement policy of Both Safety and Prevention First, and on the basis of

safety education and system guarantee, the Contractor will avoid serious accidents for human reason absolutely, and strictly observe Operation Safety Regulations

When it is necessary to move the pile driver, take into consideration the

following factors:

* whether the site ground can meet the bearing capacity of pile driver;

* whether the site ground is smooth and plane;

“ whether there are overhead structures or obstructions (such as overhead high pole electricity line and overhead cable for the purpose of construction) within the site area

The Contractor will work out safety instructions, carry out safety education regularly, and correct timely any unsafe work condition or way to secure

construction safety;

When entering and on the site, all constructors shall wear helmet and slide-proof boots according to safety regulations Obvious warning sign boards

shall be set up on construction site or work area

The site shall be with enough bearing capacity to bear the construction

equipment when it moves or work on the surface The site shall be leveled or

to be flattened, and there should be no any object in the air to obstruct the work of the equipment, such as high-voltage or construction power line, in

order that the equipment could move on the site freely

Any person cannot enter dangerous working area without permission Wear

equipment

10.6 The constructors must follow instructions by site safety director, and exercise

cares over all kinks of lines and pipe lines which are not removed on the ground or underground at any time, non-operator shall not operate construction equipment, the operator must be proved with certificate to be qualified before starting operation Any constructor shall take his mind on duty and works seriously If any dangerous sign, problem shall be solved timely Constructor can not drink alcohol or wear slippers during the course of construction

10.7 Night construction shall be carried out with enough illumination When it’s bad weather, stop the works, for construction in rainy season, there shall be lightning protection;

10.8 During installation, the Contractor shall take fire-proof measures and work out relative rules and regulations, with quite good safety and guard

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8oseo Method Statement for Sand Drains

11 General Prevention

For safety guarantee measures counter measures to prevent accident and injury/death, please refer to safety control plan;

11.1 All construction workers, including engineers, will be trained with safety of

construction, equipment, power, explosive-fire-proof and work first-aid;

11.2 First-Aid Box: there must be first-aid box on the site with specified quantity

of drugs and medical cotton;

11.3 Public Security involves safety protection of engineering, personnel, property,

office and Living area;

12.2.The crane cannot lift objects exceeding scope of boom, when the object is in

the air, it’s prohibited for persons to move material or other objects under the

boom;

12.3 When lifting object in horizontal direction, the lifted object must be at least 0.5m higher than any object in the scope;

12.4 When lifting long object, the lifted object shall not turn;

12.5 The labors for transport and installation must be experienced in operation and

its safety and related technology, and shall wear safety helmet, gloves and shoes and other work protection during working on the site The lifting and installing shall be directed by an appointed person according to right signal When lifting, no person shall stand beside or near the object, and the lifted object cannot cross over any person, any person must be at least Sm away from

the rotary scope of the crane

13 Environmental Control

Referring to environmental control measures, the Contractor will execute environmental protection according to the related Vietnam regulations during the course of construction

13.1 During the course of construction, keep fine drainage always on the site, with temporary drain ditch Transverse slope shall be built on the construction surface to avoid standing water on the embankment

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pore? Method Statement for Sand Drains

13.2 Set up system of waste recycling, reserve and disposal During the course of

construction, the waste shall be removed timely and completely before

completion of the construction;

13.3 During the course of construction, construction materials shall be stored in

order neatly

13.4 For construction equipment, serious oil leaking shall be prohibited, and it’s also prohibited to discharge oil water from mechanical operation and

maintenance without treatment

13.5 Pollution as noise and waste gas from mechanical operation shall be

minimized, when night construction is carried out near residential area,

processes with noise and vibration will not be carried out as practicable as possible, to avoid noise disturbing the local residents

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BAN QUẢN LÝ DỰ ÁN ĐƯỜNG CAO TÓC NỘI BÀI - LÀO CAI

NOI BAI - LAOCAI EXPRESSWAY PROJECT MANAGEMENT UNIT

cao tộc Nội Bài - Lào Cai)

INSPECTION SHEET FOR GEOTEXTILE PLACEMENT - STAGE I (2)

Biên bản kiểm tra thi công trải vải dia ky thuat - Giai doan | (2)

Time and Date (Ngày giờ): Mẫu số: RII - 1 (2/2)

Work Item (Hang mục): 03500-03 Geo-textile Type B Ñon-wowen Sheet - Vải địa kỹ thuật không dệt

Surface Width of Joint luali Date and Time (Ngay va gid

Site Engineer Construction Manager (POS) Inspector / Surveyor

( KS hiện trường) Giám đôc xây dựng Giám sát / Khảo sát_

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uệIq3N) 520818325V

BUJIIEM II2(]8U21

810191

93811115 BUJ9913

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BAN QUAN LY DU AN DUONG CAO TOC NOI BAI - LAO CAI

Project (tén dy an): — Noi Bai - Lao Cai Highway Project (DA đường Package (tên gói thầu): Package AI — Gói thầu AI

cao tốc Nội Bài - Lào Cai)

INSPECTION SHEET FOR GEOTEXTILE PLACEMENT - STAGE 3 (2)

Biên bản kiểm tra thi công trải vải địa kỹ thuật - Giai đoạn 3 (2)

Time and Date (Ngày giờ): Mẫu số: RỊI— 1A (2/2)

Work Item (Hang myc): 03500- Reinforcement Geotextile (wowen Sheet) - Vai dia ky thuat dét gia cường

Material Neat and Condition of Stitch

Sheet Station (Điều Geotextile | Overlay | Stitch (Cm Even Start | Finish | Exnosure

No | (ý trình) ` |(Vậtiệu| (Nối | (Nối p6 (Phẳng | (Bắt | (Kết | (T.gian chờ

mặt) khâu)

Remark (Nhdn xét):

Acceptance (Nghiém thu):

( KS hiện trường) Giám đốc xây dựng —_ Giám sát / Khảo sát

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Project (tên dự án):

The Enginecr (Kỹ sư): GETINSA INGENIERIA S.L

Noi Bai - Lao Cai Highway Project (DA đường cao tốc Nội Bài - Lào Cai)

Package (tên gói thầu):

Contractor (NT):

Package A1 — Gói thầu AI POSCO E&C Co Ltd

INSPECTION SHEET FOR CONSTRUCTION SAND MAT (1)

Biên bản kiểm tra thi công lớp đệm cát (1)

Time and Date (Giờ và ngày):

Work Item (Hang muc): 03500-02 Sand Fill Material - Vật liệu cát đệm

Location Construction (Vi trí thi công):

0ísetfrom| lahdry | Optimum | Testing | Fielddry Field Compac-

enterline density | moisture deep density | moisture | tionCoe

* Ghi chú : Compaction K > 95% maximum dry density conforming to test AASHTO T180

(Độ chặt K > 95% dung trọng khô tối đa xác định theo thí nghiém AASHTO T180)

Remark (Nhdn xét):

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BAN QUAN LY DU AN DUONG CAO TOC NOI BAI - LAO CAI NOI BAI - LAOCAI EXPRESSWAY PROJECT MANAGEMENT UNIT

Project (tén dy dn):

cao tôc Nội Bài - Lào Cai)

Time and Đate (Giờ và ngày):

'Work Item (Hạng mục): 03500-02 Sand FiIl Material - Vật liệu cát đệm

Location Construetion (Vị trí thi công):

Contractor (NT): POSCO E&C Co Ltd

OffsetiromC| lahdry | Optimum | Testing | Fielddry Field Compac-

enterline density | moisture deep density | moisture | tionCoe

* Ghi chi : Compaction K > 92% maximum dry density conforming to test AASHTO T180

(Độ chặt K > 92% dung trọng khô tối đa xác định theo thí nghiệm AASHTO T180)

Remark (Nhdn xét):

The Contractor The Engineer Site Engineer

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Project (tén dy an): — Noi Bai - Lao Cai Highway Project (DA dudng Package (tên gói thầu): Package A1 = Gói thầu AI

cao tốc Nội Bài - Lào Cai)

Work Item (Hang muc): 03500-02 Sand Fill Material - Vat liệu cát đệm Layer/Total layer:

ffísetfrom (| lahdrw | Optimum | Testing | Fielddry Field Compac-

enterline density | moisture deen density | moisture | tionCoe

* Ghi chi : Compaction K = 95% maximum dry density conforming to test AASHTO T180

(Độ chat K > 95% dung trọng khô tối đa xác định theo thí nghiệm AASHTO T180)

Remark (Nhận xét):

The Contractor The Engineer

Site Engineer | Construction Manager (POS) | Inspector / Surveyor Site Engineer in charge

(KS hign truéng) Giám đốc xây dựng Giám sát / Khảo sát | Kỹ sư phụ trách

Date : | / ¬ Date : | Date : _Date :

i

|

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BAN QUẢN LÝ DỰ ÁN ĐƯỜNG CAO TÓC NỘI BÀI - LÀO CAI NOI BAI - LAOCAI EXPRESSWAY PROJECT MANAGEMENT UNIT

Project (tén dy an): — Noi Bai - Lao Cai Highway Project Package (tên gói thầu): Package A2 — Gói thầu A2

(DA đường cao tốc Nội Bài - Lào Cai)

INSPECTION SHEET FOR TRIAL INSTALLATION OF SAND DRAIN

Biên bản kiểm tra cắm thử giếng cát

Time and Date (Giờ và ngày): " Mẫu số: RỊI - 9 (1/1)

STT | Coc sé Lý trình | Ngày | Khoảng cách tới tim quantity/ | gian thi

1) Subcontractor (Thau phu):

Date : Date : | Date : Date :

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NOI BAI - LAOCAI EXPRESSWAY PROJECT MANAGEMENT UNIT BAN QUÁN LÝ DỰ ÁN ĐƯỜNG CAO TÔC NỘI BÀI - LÀO CAI Project (tên dự án): Noi Bai - Lao Cai Highway Project

(DA đường cao tốc Nội Bài - Lào Cai)

The Engineer (Kỹ sư): GETINSA INGENIERIA S.L

INSPECTION SHEET FOR SAND DRAIN INSTALLATION Biên bản kiểm tra thi công cắm giếng cát

Bắc thâm số (Toạ độ thực tế của giếng cát) (Sai sô vị trí) đứng) giếng cát) giéng cat) |trén mat nén) (Ghi chú)

Tiêu đề	Biện Pháp Xử Lý Nền Đất Yếu
Trường học	Trường Đại học Xây dựng
Chuyên ngành	Xây dựng
Thể loại	Báo cáo
Năm xuất bản	2023
Thành phố	Hà Nội

Định dạng
Số trang	81
Dung lượng	22,51 MB