Thuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m tiếng anh

Thuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anh Thuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anhThuyết minh thiết kế bản vẽ thi công cầu nhịp chính dạng dàn bailey nhịp dẫn dầm I18m Thuyết minh thiết kế tiếng anh

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TABLE OF CONTENT

VOLUME 1:

REPORT OF CONSTRUCTION DRAWING

I INTRODUCTION 1

I.1 Project Overview 1

I.2 Basic for Design 3

I.2.1 Legal basis 3

I.2.2 Relevant documents 3

I.2.3 Applied design standards and norms 4

I.2.4 Applied design standards and norms 4

I.2.5 Scale, technical standards and design solutions: 6

II NATURAL CONDITIONS AND CURRENT STATUS OF PROJECT 7

II.1 Topography 7

II.2 Geo-technical 7

II.3 Meteorological and hydrological characteristics 11

II.3.1 Meteorological characteristics 11

II.4 Status of Existing bridge 13

II.5 Material and dumping ground for unuseful material 14

II.5.1 Material 14

II.5.2 Dumping ground for unuseful material 14

III SCALE AND TECHNICAL STANDARDS FOR PROJECT 14

III.1 Bridge 14

III.1.1 Scale 14

III.1.2 Technical standards 16

III.2 Approach road 16

III.2.1 Scale 16

III.2.2 Technical standards 16

IV DESIGN SOLUTIONS 17

IV.1 Bridge 17

IV.1.1 Bridge location 17

IV.1.2 Super-structure 17

IV.1.3 Sub-structure 18

IV.2 Approach road 19

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IV.2.1 Layout 19

IV.2.2 Longitudinal Profile 19

IV.2.3 Cross section 21

IV.2.4 Pavement structure 21

IV.2.5 Embankment 21

IV.2.6 Soft soil treatment 21

IV.2.7 Slope protection at abutment 21

IV.2.8 Traffic safety 22

IV.3 Lighting 22

V CHANGES AND ISSUES TO BE NOTES : 23

VI ORGANIZING FOR BRIDGE CONSTRUCTION 23

VI.1 Construction methods for main items 23

VI.1.1 Construction of concrete structures 23

VI.2 Order and construction procedure 24

VI.2.1 Preparation 24

VI.2.2 Organizing for construction 25

VI.3 Some notes for bridges construction 29

VII CONSTRUCTION OF APPROACH ROAD 30

VII.1 Preparation 30

VII.2 Embankment construction 30

VII.3 Pavement construction 30

VII.4 Finishing 30

VIII REQUIREMENTS FOR MATERIALS AND CONSTRUCTION TECHNIQUES 30

VIII.1 Material requirements 30

VIII.2 Specification of construction techniques 31

IX MAJOR CONSTRUCTION EQUIPMENTS 33

X CONSTRUCTION SCHEDULE 33

XI COST ESTIMATES 33

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TRANSPORT ENGINEERING DESIGN

JOINT STOCK INCORPORATED SOUTH

CENTER OF CONSULTING AND NEW

TECHNOLOGY APPLICATION

SOCIALIST REPUBLIC OF VIET NAM

Independence – Freedom – Happiness

-Ho Chi Minh city, October 6 th 2010

MEKONG DELTA TRANSPORT INFRASTRUCTURE DEVELOPMENT

PROJECT: 13 BRIDGES ON WATERWAY CORRIDORS NO 2 - STAGE I - COMPONENT B

The project "Mekong Delta Transport Infrastructure Development" (WB5 project) toimprove the transport infrastructure, reduce congestion on critical roadway andwaterways and reduce transportation costs from company to markets The upgrading ofroads, waterways in the region will bring enormous benefits, contribute to povertyalleviation, socio-economic development and create conditions for inter-connection inthe regions, reducing rate of traffic accidents on roads and waterways Ensuring securityand defense of the frontier region of Mekong Delta provinces and will be the basis forresearch for development and replicate the model of multi-modal transport

The project "Mekong Delta Transport Infrastructure Development " was performed onthe 14 provinces of Ben Tre, Soc Trang, Ca Mau, Vinh Long, An Giang, Long An, TienGiang, Dong Thap, Tra Vinh, Hau Giang, Kien Giang, Bac Lieu, Ho Chi Minh City, CanTho city, included 04 Component A, B, C, D

Component B: Invest for dredging, upgrading 02 national waterway corridors to getstandard grade III (Corridor No 2 and No 3) and construct protection works, installationsignal buoys and light towers, upgrade the existing bridge with reinforce concrete beams.Corridor No.2 - the north corridor across Dong Thap Muoi and Long Xuyenquadrangle, 253Km long, start from Ho Chi Minh (Km0 +000) and ends at Vam Ray (T -Junction of channel Rach Gia - Ha Tien and Tam Ngan) canal, Km253 +000) Phase I

Projects of 13 bridge is part of Component B - Phase I of project, aiming to upgradeand return the existing bridges crossing the Waterway Corridor No 2 to ensurenavigational clearance and other requirements of waterway after being dredged andupgraded Those bridges in area of 03 provinces: Tien Giang, Dong Thap, An Giang, list

of bridges is as follows:

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No Name ofbridge

Chain agepoint as on

Chain agepoint as onroad

Designed

Information of project (*):

under Project “Mekong Delta Transport Infrastructure Development”

 Profile scope: This design report is made for My An Bridge

- Volume 1: Commentary

- Volume 2: Drawings

- Volume 3: Calculation sheets

- Volume 4: Cost Estimate

(*) Information of project is from the Decision no 741/QD-BGTVT for project approval dated 06/4/2007 of the Ministry of Transport and terms of reference in the contract no CS- NW7 dated 15/01/2010.

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I.2 Basic for Design I.2.1 Legal basis

of Republic Socialist of Vietnam;

- Decree No.209/2004/ND-CP dated December 16th 2004 of Government aboutmanagement of construction quality;

- Decree No 49/2008/ND-CP dated April 18th 2008 of Government about amending andsupplementing some articles of Decree No.209/2004/ND-CP;

- Decree No 12/2009/ND-CP dated February 12th 2009 of Government aboutmanagement of construction investment projects;

- Decree 83/2009/ND-CP dated 15/10/2009 of the Government about amending andsupplementing some articles of Decree 12/2009/ND-CP dated 12/02/2009 ofGovernment on project management for construction investment project;

management costs construction;

announced on cost of service project management and construction consultancy service;

approving “Invest to Mekong Delta Transport Infrastructure Development project "

about approving the “standard Framework applied to survey and design - Mekong DeltaTransport Infrastructure Development project "

I.2.2 Relevant documents

(MOT) about conclusions of Deputy Minister Ngo Thinh Duc at Steering Committeemeetings for project " Mekong Delta Transport Infrastructure Development”

about adjusting some design contents of project "Mekong Delta Transport InfrastructureDevelopment"

- Report No 1326/QLXD-TD1 dated October 9th 2008 of Transport EngineeringConstruction and Quality Management Bureau about survey and inspect site of 13bridges on waterway corridors No.2

Waterways about location and scale of constructing 13 bridges on waterway corridor

No 2 - WB5 project

Deputy Minister Ngo Thinh Duc at Steering Committee meetings for project " MekongDelta Transport Infrastructure Development”

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- Document No 102/UBND-XDCB dated March 10th 2010 of Dong Thap committeeabout the agreement of location of My An bridge on waterway corridors No.2.

- The contract for consultancy services No CS-NW7 dated January 15th 2010 betweenProject Management Unit of Waterways and Transport Engineering Design Joint StockIncorporated South (TEDI South) about design consultancy for construction drawing &cost estimation, bidding documents for 13 bridges on waterway corridor No 2 - Stage 1

- Document No 151/DT-DA1 dated April 2th 2010 of Project Management Unit ofWaterways about survey for design, cost estimation and make bidding documents for 13bridges

I.2.3 Applied design standards and norms

- Design document for dredging waterway corridor No 2 made by Association ofBCEOM and Hai Dang JSC in 2008;

- Geological survey document “Mekong Delta Transport Infrastructure Developmentproject –technical design and bidding documents stages 1 Volume 5 – Bridge section ''made by BCEOM and Hong Anh Consultant & Construction Company on December2007,

- Topographical survey document made by Transport Engineering Design Joint StockIncorporated South (TEDI South) on May 2010;

- Geological survey document made by Transport Engineering Design Joint StockIncorporated South (TEDI South) on May 2010;

I.2.4 Applied design standards and norms

1 According to the standards framework approved by Ministry of Transport as Decision

No 2406/QD-BGTVT

I Applied in survey works

2 Geological works in construction project – General requirement TCXDVN 309-2004

5

Specification of geological investigation and

design measures to stabilize embankment in

7

Specification for defining Elasticity Modulus

of pavement structure by Benkelman

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9 Calculate the flood flow specification 22TCN 220-95

II Applied in design work

6 Amend and implement Signaling rules for Vietnam inland waterway 11/17-01-2005/QĐ-BGTVT

15 Decentralization of technical standards for inland waterways TCVN 5664-1992

1 Specification of survey design embankment on soft soil. 22TCN 262-2000

equipment for bridge construction

5 Specification of constructing and taking-over mix macadam 22TCN 334-06

6 Technological specification of constructing and taking-over asphalt concrete pavement 22TCN 249-98

7 Technological specification of constructing and taking-over asphalt pavement 22TCN 271-01

12 Pre-stressed concrete products- Technical andtaking-over requirements TCXDVN 389:2007

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13 Concrete - Request for natural moisturizer protection TCXDVN 391:2007

14 Cast-in-situ bored pile - standards for

constructing and taking-over

TCXDVN 326-04, 22TCN 257-2000

15 Pile - Method of testing by static pressure

16 Cast-in-situ bored pile - pulse ultrasonic

19 Specification of constructing and taking-over pre-stressed concrete beams 22TCN 247-98

I.2.5 Scale, technical standards and design solutions:

Transport

Transport: RC Bridge with one lane

Construction and Quality Management Bureau: Thien Ho Bridge with 2 lans andHL93 live load

Waterways about location and scale of constructing 13 bridges on waterway corridor

No 2 - WB5 project

 Announcement No 58/TB-BGTVT dated January 23th 2009 of Ministry ofTransport: The clearance of Navigation is 6m height for all bridges cross waterwaycorridor No 2

 Parapet : 2 sides x 0.25 m = 0.5m

Total: 4.5m

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According to geological survey documents made by Transport Engineering Design JointStock Incorporated South in May 2010, the geology and stratum at bridge position issummarized as follows:

1 Layer K: Surface course: Grey, blackish brown

This layer only appears in boreholes on the ground Thickness changes from 1.3m 7-1) to 3.6m (MA-ĐT-T6)

(MA-ĐT-2 Layer 1: blackish grey, clay, soft state

The physical-mechanical characteristics are as following:

- SPT N30: N = 0 – 4

- Average natural density : W = 1.59 (g/cm3)

- Average specific gravity : S= 2.66 (g/cm3)

- Average void ratio: eO = 1.757

- Average liquid limit WL = 64.2%

- Average plastic limit WP = 29.6%

- Average plasticity index IP =34.6%

- Liquidity index B = 0.99

- Average compression coefficient : a1-2 = 0.191 (cm2/kG)

- Direct shear test:

* Average cohesion : C = 0.071 (kG/cm2)

* Average internal friction angle: = 3050

3 Layer 2: yellowish brown, bluish grey, sandy clay, firm state, thickness changes from 3.7m

to 7.2m

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- SPT N30: N = 7 – 16

- Average natural moisture content : W= 22.3 %

- Average void ratio: e0 = 0.747

- Average plasticity index IP = 10.1%

4 Layer 3: bluish grey, yellowish brown, clay with gravel, hard state, thickness changes from

1.5m to 4.0m

- SPT N30: N = 29 – 37

- Average natural density : W = 1.96(g/cm3)

- Average specific gravity : s = 2.71 (g/cm3)

- Average liquid limit WL = 44.5 %

- Liquidity index B = -0.02

5 Layer 4: brownish grey, Sand with clay, medium dense state, thickness changes from 1.5m

to 3.4m

- SPT N30: N = 16 – 25

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6 Layer 5: whitish grey, yellowish brown, clay, very stiff state

The thickness from 2.7m to 8.0m

- SPT N30: N = 14 – 28

7 Layer 6: yellowish brown, silty Clay, stiff state

The thickness from 4.7m to 13.5m

- SPT N30: N = 13 to 28

- Average natural moisture content : W= 29.6%

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8 Layer 7: blackish grey, clay, very stiff state, the thickness from 4.0m to 6.0m.

- SPT N30: N = 17 to 24

9 Layer 8: blackish grey, fine – size Sand with clay, dense state, the thickness from 4.5m to

6.6m

- SPT N30: N = 31 to > 50

- Average plastic limit WP = 20.7 %

- Average plasticity index IP = 9.0 %

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- Bridge is in the area with few of house, almost is temporary house Using the drivenpile is suitable

Table 1: Monthly average temperatures in Cao Lanh (Dong Thap) stations ( o C)

Table 2: monthly average relative humidity in Cao Lanh station (%)

Table 3: Monthly average absolute humidity in Cao Lanh station (%)

Month

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25,6 26,9 27,9 30,1 31,6 31,2 31,0 30,9 31,4 30,8 29,4 26,2

II.3.1.3 Rain

Project located in areas having average rainfall The total of annual rainfall is about 1332.5 mmwith 119.7 rainy days The most rainfall occurs in October with 257.7 mm value According tomeasurement results, date 22/09/1984 has the largest rainfall reached 183.6 mm largest rainfall inyear is correspond to period of 1, 3, 5 days, usually fall into June, July and August Measurementsresults of average monthly rainfall and largest rainfall are presented in the table below:

Table 4: Average monthly rainfall measured at Cao Lanh station (mm)

II.3.1.5 Hydrology and flood characteristics

The route crosses main drainage line of Dong Thap Muoi region When designing this route,should ensure conformity with general development plan and not obstruct the flow Route must beoperated safely and smoothly during flood season

Survey results show that traces of floods history in year 2000 were not faded In terms of floodpeak, flood duration, total volume and risk level, the flood of year 2000 was the biggest floodduring recent 75 years Total losses was about 4,000 billion, in which inundated area was up to 2.3million hectares; about 500 people dead, inundated 865,166 households, 376 hospitals, 5,751schools, 1,273 km of inter-provincial highways, 9,737 km of inter-district and inter-communalroads, damaged dikes and embankments 1,470 km; lost 55,519 hectares of summer-autumn rice,reduced productivity of 168,814 ha, inundated 93,265 hectares of crops, orchards and industrialcrops

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Due to the special nature of flood risk in year 2000, floods in year 2000 is selected as standards

by the Ministry of Agriculture and Rural Development, Ministry of Transport when calculating fortesting, calculating for design for irrigation and transportation works in Mekong delta provinces.Bridge area is affected by tidal regimes of sea and internal rain The flood impact on this area isnot large High water levels occur in rainy season, in which reached the highest level in aroundAugust ÷ September; remaining time is low water period, in which reached the lowest level inabout February ÷ March Results of hydrology calculation are shown in detail in separate reports,here only a summary of water level data used in design works as follows:

- Canal cross section :

Notes: The elevation system is national system.

bridge

My An bridge is a rural bridge Existing bridge has spans arranged: 18m(wood)+12m(steel)+15m(steel)+3x12m(steel)=75m Wooden deck slab, 1.5m width, Girders areshape steel Railing is shape steel has been rusted heavy Two piers of middle span areshape steel, the other piers are wood The bridge is only used for motorbike and waking.When the canal is dredged with the bottom width B=26m, the existing bridge is notsuitable to the width and high of navigation Addition, the existing bridge can not bestabilization after dredging makes the bottom of canal deeper So, we must build a newbridge, remove the existing bridge complete then dredge the canal

ground for unuseful material

II.5.1 Material

- Sand for concrete: from Tân Châu mine, transport to the site by waterway, distance

95.44km including 59.5km river class 1 (Tien river) and 35.94km canal class 3 (NguyễnVăn Tiếp canal)

- All type of stone: from Antraco mine - Châu Lăng commune, Tri Tôn district, transport

to the site by waterway, distance 118.53km including 16.5km (Hau river) and 14.5km

(Tien river) class 1 and 15.1km of river class 2 (Vàm Nao river) and 36.49km of canal

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class 3 (Tám Ngàn and Tri Tôn canal) and 35.94km of canal class 3 (Nguyễn Văn Tiếpcanal).

- Bitumen, steel, cement are from local

- All type of RC pre-stressed girder: Use precast girders from Binh Minh factory,transport to the site by waterway with the distance is 90.64km, including 69.2km ofriver class 1 (Tien river), and 35.94km of canal class 3 (Nguyễn Văn Tiếp canal)

- Bailey type frame: Use product of Co Khi An Giang factory, transport to the site bywaterway with the distance is 82.04km, including 16.5km of river class 1 (Hau river),

and 14.5km (Tien river) class 1 and 15.1km of river class 2 (Vàm Nao river) and

35.94km of canal class 3 (Nguyễn Văn Tiếp canal)

II.5.2 Dumping ground for unuseful material

- 13 bridges is a part of the Dredging national waterway corridor No.2, so PMUWrequired use dumping ground from dumping ground report of Design document fordredging waterway corridor No 2 made by Association of BCEOM and Hai Dang JSC

in 2008;

III.1.1 Scale

- Bridge is steel, reinforced concrete and pre-stressed reinforced concrete

- Design load 0.5xHL93

- Span for Navigational clearance :

The width of the navigational clearance B=30m, so we need a span with length enough Wehave a comparison for two options:

 First option: Truss type bailey 4.2HC is a product of the factory, load applies is

0.5xHL93 with span length up to 36m The width for the carriage-way B=4.0m

+ Structure is light, easy to transport, construction Each section is 3.02m length.Assembled at the site

+ The high from bottom to the level of carriage way is only 93cm so we can reduce thelength of bridge and the height of the embankment at the abutment

+ Easy for maintaining and repairing

+ The fee for maintaining and repairing of steel structure is higher than concretestructure

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 The second option: use pre-cast pre-stress reinforce concrete girder type I, length33m

+ It is difficult to cast the pre-stress girder 33m at the site, launching is difficult If we buy

it, we must transport 250km from factory to the site

From comparison of 2 options, Consultant chooses the option of Bailey for middle spanbecause it is cheaper Bridge length and embankment height are limited, and construction

is easier This issue has been mention in letter No 213 213/ÑT-ÑPDA date July 14th

2008 of Project Management Unit of Waterways and in announcement No BGTVT date April 8th 2008 of Ministry of Transport

133/TB Span with two lanes:

+ We use the pre-cast pre-stress reinforce concrete girder type I Girder length is 18m and15m, 14m, it is product of factory and convenient for construction And it has been use for

a lot of projects in Me Kong delta

+ Length of bridge > 200m and width is for 1 lane Incase of two cars run in 2 ways on thebridge because they can not see each other So we need 2 lanes for span next to themiddle span

+ The width of the carriage way Bxc=7.0m, parapet width: 2x0.25m, and total is 7.5m.+ There are 11 girders for 1 span, distance between girders is 70 cm Deck slab is reinforceconcrete 30MPa 10cm thick and 5cm of reinforce concrete 30MPa for cover

- Span with one lane:

+ There are 6 girders 18m long for 1 span, distance between girders is 70 cm Deck slab isreinforced concrete 30MPa 10cm thick and 5cm of reinforce concrete 30MPa for cover

- Sub-structure:

 Foundations: Use the driven square piles type 45x45cm for piers and abutments

 Piers structure: using pier of dense-body format for span 33m long and pier of twocolumn-body formats for other piers Pile cap, body and capping are cast in placereinforced concrete 30MPa

- Approach road: Double bituminous surface treatment with 2 layers standard 3.0kg/m2

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