Đồ án kĩ thuật thi công 2 tiếng anh đại học xây dựng construction

One-storey industrial building with 2 spans and 13 frames constructed by assembly methodfrom a range of different structure members including concrete columns, roof and wall panels,crane

NATIONAL UNIVERSITY OF CIVIL ENGINEERING

DIVISION OF CONSTRUCTION TECHNOLOGY AND MANAGEMENT

CONSTRUCTION TECHNOLOGY II PROJECT

Requirement: Design assembly method for Industrial building using

One-storey industrial building with 2 spans and 13 frames constructed by assembly methodfrom a range of different structure members including concrete columns, roof and wall panels,crane runway beams, concrete roof frames, and opening windows These components havealready been fabricated in factories, then delivered to construction site for installing.

Length of building: 12x6 = 72 (m), so there should be one settlement joint

Width of building: L = 2 x 18 = 36 (m)

1 Building cross-section:

BUILDING CROSS SECTION

BUIDLING PLAN

2 Structure parameters:

II SELECTING EQUIPMENTS:

1 Selecting hanging and tying equipments:

β - Inclined angle of cable and vertical direction, β=00

m - Ratio related to the difference in the value of tensile forcewithin the two branches of cable, m=1

n - Number of steel cable, n=2

 Length of each steel cable: lbc= 1.5 + 3.3 = 4.8 (m)

β - Inclined angle of cable and vertical direction, β=00

m - Ratio related to the difference in the value of tensile forcewithin the two branches of cable, m=1

n - Number of steel cable, n=2

e

q = × × +γ l q = × × + =

SQct

1.2 Crane runway beam

Crane runway beam (CRB) is a structure member working in horizontal direction, so wechoose an ordinary equipment for hanging and tying with semi-automatic lock The way how

to hang and tie is shown in the following figure

where:

1- Steel cushion block2- Steel cable

3- Semi-automatic lock4- Pipe section for inserting cable

Crane runway beam (CRB) is a structure member working in horizontal direction, so wechoose an ordinary equipment for hanging and tying with semi-automatic lock

Tensile force of cable is determined by the below formula:

cosβ

ttP

β - Inclined angle of cable and vertical direction, β=450

m - Ratio related to the difference in the value of tensile force within thetwo branches of cable, m=1

n - Number of steel cable, n=2

Frictional belt weight: qfb=30kg

qe = γ.l + qfb= 1.06 x 4.89 x 2 + 30 x 2= 70.84 kg = 0.071 T

1.3 Concrete roof panels:

Panels have 2 dimesions 3x6 (m) with the weigh of 2.3 T ,we use four steel cables with aself-balacing ring

Tensile force in each cable is calculated by:

cosβ

ttP

S k

m n × ×

= × 1.1 2.3 2.53 T

tt

m=0,75 (four cables-branches)n=4

β= 450 (for safety purpose, calculate with β=450)

 Length of each steel cable: l= 6 (m)

qe= 0.59 x 6 x 4= 14.2 (kg) = 0,01 (T)

1.4 Concrete wall panels:

cables with a self-balacing ring

Tensile force in each cable is calculated by:

cosβ

ttP

S k

m n × ×

= × 1.1 2.3 2.53 T

tt

m=1n=2

reason, calculate with β=450)

 Weight of equipment for lifting:

qe= 4.5 x 1.06 x 2= 9.54 (kg) = 0,01 (T)

1.5 Steel frame:

Because contructing these components at high place, steel roof frames need to be erected on the ground in order to ensure safety and then be hanged and installedsimultaneously Tools for hanging and tying are equipped semi-automatic lock and self-balancing ring

pre-The steel roof frames have long span, so hanging bar is used to assist the process oferecting Supported positions are chosen at joints of frames to avoid moment and shear forceappearing within frames

The steel roof frames have L=18m in length, we choose hanging bar with code

Ptt= 1,1.P= 1.1 x (5+1.2)= 6.82 (T)n= 2

m= 1β=30o

Selecting cable 6x37x1 with diameter D=24 mm, tensile strength (140 kg/cm2), failureforce F= 24300 (kg)

Frictional belt weight: qfb=30 kg

qe= γ.l + qfb+ G= 1.99 x 5 x 2 + 30 x 2 + 455= 534.9 (kg) = 0.53 (T)

2 Lifting and installing data calculation:

Selecting crane tower base on the following parameters:

Hrq – height of hook

Lrq - length of working jib

Qrq - lifting capacity

Rrq - working radius

2.1 Calculating lifting & installing data of column

Assembling column without obstacles

=> working jib with αmax = 750

HL: height to install element HL = 0

a : distance from ground to height of lifting cable a = 0.5 m

hm : height of element hm = 13.3 m

he : length of lifting cable he = 1.5 m

hh : height of pulley, hook hh = 3.47 m

H h

Working radius of jib :

S=Lmin×cos 75 17.8 cos 75 4.6(m)= × =

Minimum working radius of crane:

HL: height to install element HL = 0

a : distance from ground to height of lifting cable a = 0.5 m

hm : height of element hm = 13.3 m

he : length of lifting cable he = 3.47 m

hh : height of pulley, hook hh = 3.47 m

Jib length :

H h

Working radius of jib :

S=Lmin×cos 75 17.8 cos 75 4.6(m)= × =

Minimum working radius of crane:

Rrq = S + r

→R rq =4.6 1.5 6.1+ = m

2.2 Calculating lifting & installing data of crane runway beam

Assembling of crane runway beam without obstacles

=> Select working jib follow : αmax = 750

Lifting capacity : Qrq = Ptt + qe = 3.63+ 0.07 = 3.7 T

Requirement height:

Hrq = HL + a + hm + he + hh

With :

HL: height to install element HL = 10 – 0.7 = 9.3 m

a : height of lifting element a = 0.5 m

hm : height of element hm = 0.8 m

he : length of lifting cable he = 2.4 m

hh : height of pulley, hook hh = 1.5 m

Working radius of jib :

S = Lmin x cos750 = 13.45 x cos750 = 3.48 m

Minimum working radius of crane:

Rrq = S + r

→R rq =3.4 1.5 4.98( )+ = m

2.3 Calculating lifting & installing data of roof frame and opening window:

Assembling of crane runway beam without obstacles so we choose working jib as follow :

αmax = 750

HL: height to install element HL = 13.3 – 0.7 = 12.6 m

a : height of lifting element a = 0.5 m

hm : height of element hm = 2.45 + 2.6 = 5.05 m

he : length of lifting cable he = 1 m

hh : height of pulley, hook hh = 1,5 m

Working radius of jib :

S = Lmin x cos750 = 19.93 x cos750 = 5.16 m

Minimum working radius of crane:

Rrq = S + r

→R rq =5.16 1.5 6.66( )+ = m

2.4 Calculating lifting & installing data of roof panel

Without fly jib H L = 17.75 m

HL: height to install element HL = 13,3 – 0.7 + 2.45 + 2.6 = 17.75 m

a : height of lifting element a = 0.5 m

hm : height of element hm = 0.4 m

he : length of lifting cable he = 6cos(45)=4.24 m

hh : height of pulley, hook hh = 1,5 m

With hc – level of the slewing ring of the crane (from the ground surface)

w ar ch c' 75

t

H h ctg

Working radius of jib :

0

19.03 1.5

cos 75 3 1 8.70( )sin 75

Minimum working radius of crane:

Rrq = S + r

→R rq =8.70 1.5 10.2( )+ = m

2.4 Calculating lifting & installing data of wall panel

Assembling of crane runway beam without obstacles

=> Select working jib follow : αmax = 750

Lifting capacity : Qrq = Ptt + qe = 2.53+ 0.01 = 2.54 TRequirement height:

Hrq = HL + a + hm + he + hh

With :

HL: height to install element HL = 13.3– 0.7 =12.6 m

a : height of lifting element a = 0.5 m

hm : height of element hm = 3 m

he : length of lifting cable he = 4.5cos(45)=3.18 m

hh : height of pulley, hook hh = 1.5 m

Working radius of jib :

S = Lmin.cos750 = 19.96 x cos750 = 5.17 m

Minimum working radius of crane:

Required parameters Crane parameters

Qrq Rrq Hrq Lmin Type of crane Q R H

1 Column Middle 9.62 6.1 18.77 17.8

MKG-25BR/18.5m 9.7 7.5 21Side 8.63 6.1 18.77 17.8 8.7 8 20.5

2 Crane ruway beam 3.7 5 14.2 13.1

III CONSTRUCTION METHOD:

Determine crane position based on lifting parameters of crane and construction site

Rmax

1 Columns installation:

columns respectively.(self-weight of side and middle columns are 8.7 and 9.7 respectively

1.1 Crane position:

For each axis A, B, or C, number of postions for crane to install columns is:

14 n= 5 positions

Mark column centers on foundation surface Prepare supporting equipment

Check columns’ dimensions, connection between columns and crane runway beams.Prepare aggregates for concrete mixing batches

Use 5 wedges and 4 cables to temporarily fix each column Adjust column’s level andposition

Clean the columns’ bottoms and fix them to the foundation with fast setting mortar

Fixing process includes 2 phases:

- Phase 2 : After concrete mortar reaches 80% strength, remove wooden wedges and

fill the foundation socket with mortar

2 Crane runway beam installation:

2.1 Crane position:

Crane MKG10 (L=18m);with Q=3.7T => Rmin=4m; Rmax=6m.

Each position can be used to install 2 Crane runway beams

=> There are 6 x 3=18 postions in total to install all crane runway beam for the building

2.2 Construction method:

Preparation :

Check CRBs’ dimensions, connecting bolts.

Check the hanging system

Prepare connecting components such as bolts, welder, welding machine

Installation:

Hang and lift CRB up Use rope system to adjust CRB positions on column’s console.Use steel plate to adjust level of CRB (if necessary)

Use bolting and welding connections to fix the CRBs to the columns

3 Roof frame and opening window installation:

3.1 Crane positions:

Crane MKG-25BR (L=28.5m) with Q=7.5T => Rmin=6m; Rmax=9m.

3.2 Construction method:

Preparation:

Only install the roof frame if the concrete connections of columns reach at least 70%strength

Locate roof frame position for precise errection

Use steel hanging equipment with 4 hooking points at nodes of the steel truss

Strengthen the stee truss before erecting

Prepare working platform for the workers

4 Roof panels installation:

Check and permanently fix the roof panels

5 Wall panels installation:

Direction: from lower to higher positions

Check and adjust before permanently fixing

IV TECHNICAL PARAMETERS OF CONSTRUCTION:

1 Crane moving path:

2 Hiring time of crane:

Machine quantity Labor

Machine Shift Man-day

1 Side-columns 28.00 3.92 47.32 4.00 1.00 12Middle columns 14.00 1.96 23.66 2.00 1.00 12

4 Wall panel 144.00 2.59 12.96 4.00 1.00 4