Construction Engineering project

CONSTRUCTION ENGINEERING PROJECT3131

NATIONAL UNIVERSITY OF CIVIL ENGINEERINGDIVISION OF CONSTRUCTION TECHNOLOGY AND MANAGEMENT

COURSEWORKCONSTRUCTION ENGINEERING ICONSTRUCTION OF MONOLITHIC REINFORCED CONCRETE IN MULTI-STOREY BUILDINGS

Content: Design construction method of monolithic reinforced concrete in multi-storey buildings

Tutor:PHAM NGUYEN VAN PHUONG

Student:NGUYEN MANH TU

Class:55XE

Id Number53856

DATA

Number of storeys5

Number of spans15

[] Wood (kG/cm2)105

Wood (kG/m3)600

Season Summer

Foudationb (m)1.3

A (m)A2.3

B2.5

C2.3

t (cm)30

BodyB (m)3.6

L (m)15.2

23.6

H1 (m)4.2

Ht (m)3.6

Hm (m)3.6

ColumnC1 (d/h1)F.125/40

F.3; F.225/35

F.5; F.425/30

C2 (d/h2)F.125/40

F.3; F.225/35

F.5; F.425/30

s (cm)15

Beam D (cm)D1D1g25/40

D1b25/55

D225/30

D320/30

RoofDm25/55

m (cm)15

Reinf. ratio %1.5

CONSTRUCTION ENGINEERING PROJECTiiii

CALCULATIONI. DRAWINGS:

II. PRELIMINARY DATA:1. Preliminary concrete volume, steel mass and form work area:CONCRETE VOLUME

ElementSizeVolume per elementQuantityVolumeTotal

Length (m)Width (m)Height (m) (m3)(m3) (m3)

ColumnC1F[1]4.20.250.40.423213.441185.89

F[2;3]3.60.250.350.3156420.16

F[4;5]3.60.250.30.276417.28

C2F[1]4.20.250.40.424820.16

F[2;3]3.60.250.350.3159630.24

F[4;5]3.60.250.30.279625.92

BeamD1D1b5.20.250.550.71512891.52

D1g3.60.250.40.3612846.08

D23.60.250.30.27375101.25

D33.60.20.30.21630064.8

DmDmb5.20.250.60.783224.96

Dmg3.60.250.60.543217.28

SlabS15.23.60.152.808150421.2

S23.63.60.151.944150291.6

STEEL MASS

ElementVolumnReinf.Steel Steel MassTotal

(m3) ratio (%)Unit Weight(Kg) (Kg)

(Kg/m3)

ColumnC1F[1]13.440.01578501582.56139638.5

F[2;3]20.160.01578502373.84

F[4;5]17.280.01578502034.72

C2F[1]20.160.01578502373.84

F[2;3]30.240.01578503560.76

F[4;5]25.920.01578503052.08

BeamD1D1b91.520.015785010776.48

D1g46.080.01578505425.92

D2101.250.015785011922.19

D364.80.01578507630.2

DmDmb24.960.01578502939.04

Dmg17.280.01578502034.72

SlabS1421.20.015785049596.3

S2291.60.015785034335.9

FORMWORK AREA

ElementSizeAreaNumber ofArea ofTotal

Length (m)Width (m)Height (m) (m2)ElementsFormwork (m2) (m2)

ColumnC1F[1]4.20.250.45.4632174.7216341.16

F[2;3]3.60.250.354.3264276.48

F[4;5]3.60.250.33.9664253.44

C2F[1]4.20.250.45.4648262.08

F[2;3]3.60.250.354.3296414.72

F[4;5]3.60.250.33.9696380.16

BeamD1D1b5.20.250.558.321281064.96

D1g3.60.250.44.68128599.04

D23.60.250.33.963751485

D33.60.20.33.63001080

DmDmb5.20.250.558.3232266.24

Dmg3.60.250.555.7632184.32

SlabS15.23.60.15391505850

S23.63.60.15271504050

2. Vertical transport equipment:Select tower crane on rail because: Concrete volume is about 1200m3 (>100m3 concrete per slab) Capable of reducing number of labours. Capable of reducing time for transporting materials High quality in construction process Length of building is great meanwhile height is average.

III. FORMWORK DESIGN:1. Slab formwork:The slab formworks are laid on the stringers. The shores are necessary for the slab stringers.Distance between T-shores must me calculated based on durability and deformity condition.a. Calculating diagram: 1- Concrete slab; 2- Boards; 3- Stud; 4 Stringer;

Select a typical slab to calculate the formwork: L1=5.2+3.6 (m), B=3.6 (m) (Axis A-B-C;1-2). Calculate on a strip with width 1(m). (Perpendicular to the stringers direction). Calculating diagram is a continuous beam with stringers acting as supports.

Calculating diagram of a slab strip with width 1mb. Loads: Self-weight of slab formwork (q1), (n1=1.1)

Self-weight of concrete slab (q2), (n2=1.2)

Self-weight of steel (q3), (n3=1.2) (kg / m) (kg / m) Live load by pouring concrete and vibrating load (q4), (n4=1.3)

Live load of workers and construction equipment (q5), (n5=1.3)

Total load for checking Durability condition of slab formwork:gtt = Gtt+Ptt = 19.8+450+21.19+1040+325=1856 (kg/m) Total load for checking Deformity condition of bottom board:gtc = Gtc = 18+375+17.66=410.66 (kg/m)c. Distance between stringers: Geometric properties of slab formwork:

Distance of stringers based on the Durability condition:

Legend: M: Maximum bending moment:

[]w = 105 x 104 (kg/m2)

105 x 104 x 1.5 x 10-4 l10.92 m Distance of stringers based on the Deformity condition:

Legend:: calculating deflection of slab formwork

(TCVN 4435:1995, corresponding with component having exposed surface)

Select lstringer min(l1;l2) => lstringer = 0.9 (m)

Number of stringers per a typical slab (figure below)

d. Slab shores:Calculating diagram: continuous beam with slab shores acting as supportsSelect the cross-section of stringer: 0,08 x 0,12 mThe distance between loads applied on each stringer: bstringer = lstringer = 0.9 (m)

{Hinh v}Stringers and slab shores in a typical slab

Geometric properties of stringer:

Loads: Load from slab formwork: (kg/m) (kg/m) Self-weight of stringer:

Total load for checking Durability condition of slab shores:1670.4+6.34=1676.74 (kg/m) Total load for checking Deformity condition of slab shores:369.6+5.76 = 375.36 (kg/m) Distance between slab shores: Durability condition:

Deformity condition

Select Design slab shore:

Select slab shore: bcxhc=0.1x0.1(m), , []=105(kg/cm2), Geometric properties:

Slenderness: Check Durability condition:

Total deformity of slab formwork: Deformity of T-shore:

Maximum deformity of slab board:

Absolute deformity of slab formwork:

2. Beam formwork:Beam formwork includes 2 side boards and 1 bottom board.Bottom board is calculated as continuous beam with T-head shores acting as supports.Side board is calculated as continuous beam with studs acting as supports.

{Hnh v}

a. Formwork of beam D1b and DM:Dimension of beam D1b and DM: bxh=25x55(cm)

Thickness of bottom board:

Thickness of side board: Calculating bottom board: Loads: Self-weight of bottom board (q1), (n1=1.1)

Legend:

- Unit weight of wood,

- Cross-section area of bottom board

Self-weight of concrete beam (q2), (n2=1.2)

Self-weight of steel (q3), (n3=1.2)

Live load by pouring concrete and vibrating load (q4), (n4=1.3)


Total load for checking Durability condition of bottom board:

Total load for checking Deformity condition of bottom board:

Distance between T-shores to support bottom board: Geometric properties of bottom board:

T-shore distance::Durability condition:

Deformity condition:

Select T-shore distance:

Calculating side board: Design height of side board:

Loads: Horizontal load of concrete motar:

Horizontal load by pouring concrete and vibrating load. Use bucket with volume larger than 0.8m3. According to TCVN 4453-1995:

Total load for checking Durability condition of side board:

Total load for checking Deformity condition of side board:

Distance between studs to support side board: Geometric properties of side board:

Stud distance:Durability condition:


Select Stud distance:

T-shore for beam D1b and DM: Vertical loads from bottom board applied on T-shore: (P1: design load, P2: standard load)

Loads from side boards and transmit through braces:

Self-weight of side boards:

Total loads applied on T-shore:

Select T-shore: bcxhc=10x10(cm),, Geometric properties:


Total deformity of bottom board: Deformity of T-shore:

Maximum deformity of bottom board:

Absolute deformity of main beam formwork:

b. Formwork for beam D1g:Dimension of beam D1b: bxh=25x40 (cm)



Legend:










T-shore distance:Durability condition:





Horizontal load by pouring concrete and vibrating load. Use bucket with volume larger than 0.8m3. According to TCVN 4453-1995:



Distance between Studs to support side board: Geometric properties of side board:




T-shore for beam D1g: Vertical loads from bottom board applied on T-shore:

Loads from side boards and transmit through braces:



Select T-shore: bcxhc=10x10(cm),, Geometric properties:





c. Formwork for beam D2:Dimension of beam D2: bxh=25x30 (cm)


Thickness of side board:

{Hnh v}

Calculating bottom board: Loads: Self-weight of bottom board (q1), (n1=1.1)

Legend:










T-shore distance:Durability condition:





Horizontal load of pouring concrete and vibrating load. Use bucket with volume larger than 0.8m3. According to TCVN 4453-1995:



Distance between Stud to support side board: Geometric properties of side board:




T-shore for beam D2: Vertical loads from bottom board applied on T-shore:



Select T-shore: bcxhc=10x10(cm),,, Geometric properties:





d. Formwork for beam D3:Dimension of beam D2: bxh=20x30 (cm)



Legend:










T-shore distance::Durability condition:


Select Distance between T-shores s to support bottom board:



Horizontal load of pouring concrete and vibrating load. Use bucket with volume larger than 0.8m3. According to TCVN 4453-1995:



Distance between Studs to support side board:: Geometric properties of side board:




T-shore for beam D3: Vertical loads from bottom board applied on T-shore:



Select T-shore: bcxhc=10x10(cm),,, Geometric properties:

Slenderness:

Check Durability condition:




3. Column formwork:

{Hnh v}Select the biggest column to design column formwork and use these parameters for the others. Calculating the formwork for column C2 of the first floor: bxh = 25x40 (cm) Calculating diagram: continuous beam with clamp acting as supports:

Loads applied on column formwork:According to TCVN 4453-1995: Horizontal pressure of the newly formed concrete (using needle vibrators):

Legend:

- self-weight of newly formed concrete,

: height of concrete layers (not higher than impact radius of needle vibrator R=75(cm)).

Horizontal pressure of pouring concrete:Normally, pouring and vibrating do not occur simultaneously.

According to TCVN 4453-1995, bucket with volume larger than 0.8 (m3): , reliability coefficient n = 1.3

Total load for checking Durability condition of column formwork (applied on larger side h=40(cm)):

Total load for checking Deformity condition of column form work (applied on larger side h=40(cm)):

Geometric properties of column side board:

Distance between clamp: Durability condition:


Select

IV. LIST OF CONCRETE VOLUME, REINFORCEMENT MASS, FORMWORK AREA, AND LABOUR FOR RESPECTIVE WORKS:

V. CREATING CONSTRUCTION SCHEDULE:1. Construction method: Deviding into 2 phases: Phase 1: constructing columns, walls and a side of staircases. Phase 2: constructing beams, slabs and the other sides of staircases. Line of balance method: deviding project into different tasks. Each task is executed by a particular group of workers. The tasks are: Installing column reinforcements and column formworks. Pouring concrete for columns. Dismantling column formworks, installing formwork of beams and slabs. Installing reinforcement of beams, slabs. Pouring concrete for beams, slabs. Dismantling beam and slab formworks.

2. Devide construction site into partitions:a. Principle: Number of partitions should ensure the continuous production line. Difference between the largest and smallest partition should not exceed 25%. Volume of concrete in a partition must be poured continuously in a work shift. Partion must stop at settlement joint of building. Partion must stop at position with low value of internal forces. Guarantee of conditions : m n+1where : m: total number of partitions; n: total number of tasks

b. Arrange construction site: Devide construction site into 10 partitions.

Difference between 2 partitions (Largest partition and smallest partitions):

3. Construction equipment:Building length: 54mBuilding width: 17.6mBuilding height: 18.6mUse mobile crane as vertical transport equipment.a. Vertical transport equipment (Mobile crane):

Calculating the required height:H = HL + h1 +h2 + h3=18,6+1+1,5+1=22.1 mLegend:HL = 18,6m - Building height from the crane- standing level h1 = 1m - The safety distance (h1 = 0,5 1m).h2 = 1,5m - The maximum height of the structure components of craning (the height of the concrete mortar barrel)h3 = 1m - The height of the hanging equipment Loading capacity: Select concrete bucket with volume V=0.9 m3 from: Tan Hoa Phat- Size: 1100x1500x1400- Mouth sheeting thickness: 3mm 0.1- Bottom plate thickness: 4mm 0.1`- Outer pipe diameter: 270- Type of discharge: Getting off- There are floor standing operationWeight of concrete: 2.5x0.9=2.25 (T)Self-weight of bucket: 0.2 (T) Q=2.25+0.2=2.45 (T) Calculating the required jib length:

Legend: hc= 3.8m: distance from crane-standing level to boom pivot level 2a: width of the building (mesured from this scaffolding edge to that scaffolding edge) e=11.5m: Safety distance

=45: the angle between boom direction and horizontal direction

Calculating the crane reach:

Select mobile crane:Select mobile crane base on the following requirements:- Load capacity: Q= 3.95 (T)- Jib length: L= 35.5 (m)- Crane reach: R=30.35 (m)- Hoisting height: H=22.1 (m) Select LIEBHERR LTM 1080/1 with the following parameters:- Load capacity (min-max): Shore: Q= 1.4-80 (T) No shore: Q= 32 (T)- Operating radius (min-max): R=2,8-30 (m)- Hoisting height: H=22 (m)- Speed: Hoisting and lowering speed: 119-10 m/min Slewing speed: 0.4-1.3 r/min Cycle of mobile crane:

Legend: E: silmutaneous gestures factor E=0.8

: time for gesture number i with speed vit1=10(s): time for hanging the bucket on the lifting hook.

: hoisting time.

: slewing time to pouring position.

: time for lowering the buckets to constructing position

: pouring concrete time.

: time for hoisting bucket to former position

: time for taking a new bucket.

Productivity of tower crane:

Legend:Q=1.5x2.5=3.75(T): load capacity

: time period of a cycle

: number of cycle in an hour.

: weighting factor.

: factor considering time-used of crane.T=8h: time of a working shift Consider day-25 (maximum mass) Concrete: 31.61 m3 Productivity of pouring concrete:

> 31.61 m3 b. Concrete mixerSelect unforced concrete mixer HD750 of Hoa Phat Company

Legend:V=550: Effective volume of mixer (litre) V=0.75V0

n: number ofmix batches in 1 hour (Tck includes time for pouring the mix design into the mixers barrel, mixing concrete and pouring concrete mortar to the transport equipment respectively)K1: Factor of finished product of concrete (K1=0.67 0.72)K2: Factor of using the mixer with time (K2=0.9 0.95)

Total volume of concrete can be mixed in a shift: c. Concrete vibrators Concrete volume of columns needs to be vibrated: V=4.75(m3) Concrete volume of beams and slab needs to be vibrated: V=35.66(m3) (Note: calculate for largest partion) Use needle vibrator for columns and beams and slabs.Select 8 needle vibrators I-21A with productivity 6m3/shift

4. Construction time:

(day)Legend:k=1: Time to finish a task in a partitionc=1: Number of shift per daym=10x5=50 partions: number of partions of the buildingn=7: number of single tasks in construction sitet=12 days: interruption time, including due to 2.5 lelvel rule.

There are 7 task at site as below:1. Install column reinforcement2. Install column formwork3. Pour column concrete4. Dismantle column formwork, install beam and slab formwork5. Install beam and slab reinforcement6. Pour beam and slab concrete7. Dismantle beam and slab formworkBy applying 2.5 level rule, the construction schedule diagram is drawn as below:

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Construction Engineering project