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Construction method of 14 box culvert(3人评价)

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箱涵施工

PROJECT: APPROACH ROAD OF CAN THO SIDE PACKAGE: 3 CONSULTANT: JV CONSULTANT CONTRCTOR: CSCEC

CONSTRUCTION METHOD STATEMENT FOR BOX CULVERT

1. Description

1.1 Quantity

There are total 14 sets box culverts for drainage with two types size (Type A: 2 x 2.5 x1.5m; Type B: 2 x 2.5 x

2m) in Package3. The more details refer to the following list:

LIST OF BOX CULVERT

left center right

1 Km7+826 2x2.5 x2 30.62 4.06 4.28 4.06 0.2 drainage

2 Km8+890 2x2.5 x2 38.7 3.3 3.685 3.418 0.55 drainage

3 Km9+326 2x2.5 x1.5 24.1 2.502 2.747 2.502 0.252 drainage

4 Km9+620 2x2.5 x1.5 30.92 2.514 2.869 2.514 0.264 drainage

5 Km10+310 2x2.5 x2 30.21 3.637 3.9 3.575 0.825 drainage

6 Km10+690 2x2.5 x1.5 24.1 2.419 2.664 2.419 0.169 drainage7 Km10+950 2x2.5 x1.5 24.1 2.539 2.784 2.539 0.289 drainage

8 Km11+451 2x2.5 x1.5 24.1 2.843 3.088 2.843 0.593 drainage

9 Km11+690 2x2.5 x1.5 24.1 2.955 3.2 2.955 0.705 drainage

10 Km12+180 2x2.5 x2 32.9 5.105 5.35 5.105 0.7 drainage

11 Km12+756 2x2.5 x2 28.53 3.656 3.9 3.619 0.7 drainage

12 Km13+600 2x2.5 x1.5 24.1 2.624 2.869 2.624 0.374 drainage

13 Km14+450 2x2.5 x1.5 24.1 3.199 3.444 3.199 0.949 drainage

14 Km14+890 2x2.5 x1.5 24.1 2.425 2.67 2.425 0.175 drainage

Finished elevation (m) Bottomelevation

(m)remarkNo. Station Size (m) length

(m)

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风中黑狼1贡献于2011-07-27

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1/28/2015 Construction method of 14 box culvert_百度文库

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1

PROJECT: APPROACH ROAD OF CAN THO SIDE PACKAGE: 3 CONSULTANT: JV CONSULTANT CONTRCTOR: CSCEC

1.2 Related articles

Concrete:

The batch plant concrete will be used for the castinsite culvert, and the requirement of the concrete refers

to the following list:

LIST OF REQUIREMENT FOR CONCRETE

Concrete Class Strength

f’c (MPa) Kind of structure in use

E 24 Box culvert, pipe culvert Retaining wall, wing wall, support of pipe, drop inlet, catch cover

F 20 Apron, kerb

G 15 Lean concrete

Rebar:

No Description Strength

f’y (MPa) Related specification

1 PLAIN ROUND BAR 250(Min) ASTM A615 or equivalent

2 High yield deformed bar 390(Min) ASTM A615 or equivalent

Specification: LIST OF RELATED SPECIFICATION

NO. RELATED SPECIFICATION

1. AASHTO 98 _ LRFD BRIDGE DESIGN SPECIFICATION

2. AASHTO GUIDE SPECIFICATION FOR DESIGN AND CONSTRUCTION OF SEGMENT CONCRETE BRIDGES

3 VIETNAMESE HIGHWAY BRIDGE STANDARD 1979

2. Preparation for construction

2.1 Material

① Rebar: the grade, dimension should be accordance to the contract requirement, supply with

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2

① Rebar: the grade, dimension should be accordance to the contract requirement, supply with

PROJECT: APPROACH ROAD OF CAN THO SIDE PACKAGE: 3 CONSULTANT: JV CONSULTANT CONTRCTOR: CSCEC

3

certification of quality, and keep the rebar surface from rust.

② Cement: Use the qualified PC40 type.

③ Course aggregate: gravel>1X2cm, capacity of compress resistance≥ 500kg/cm2, impurity

ratio<1%;

④ Sand: course sand or river sand, impurity ration<2%

⑤ Water: living water

⑥ Excavation under water level: Steel pile (L=12m), Shape steel for guide frame (400x400, 300x300),

Steel reinforcement cage with steel mesh (main steel bar d=25, L=1m, cage d=0.8m)

2.2 Equipment/machine

① Excavation: vibration hammers, crawler crane, grab, bulldozer, loading vehicle, shovel, manual

truck, grade stick, etc.

② Rebar work: rebar hook, wrench, ripping bar, curve machine, 22# iron thread, etc.

③ Formwork & support: 18mm thickness wood veneer formwork, 50X100mm timber, 3mm thickness

steel plate formwork, Ø48×3 steel pipe and steel support, Ø16 tension bar, axe, handsaw, power saw,

etc.

④ Equipment for pouring concrete: internal vibrator, shovel, hose, concrete tank car, concrete bucket,

concrete conduit pipe, wood float;

⑤ Equipment for drainage: Water pump, temporary electric facilities, pipes

2.3 Preprocedure

① Complete the R.C pile works for the foundation, and get covering acceptance minute for the pile

works;

② Site clear and grub, arrange site plan, the material, formwork, timber will be stacked in sort.

③ Study the working drawing, confirm the location of embed rebar, the installation sequence of

formwork, and concrete casting sequence; ④ Before the next stage procedure, get the acceptance minute or temporary inspection for the

current procedure, make a record and report when the inspection is qualified.

3. Working procedure

3.1 Working sequence The working sequence will be described as the following:

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PROJECT: APPROACH ROAD OF CAN THO SIDE PACKAGE: 3 CONSULTANT: JV CONSULTANT CONTRCTOR: CSCEC

4

3.2 Procedure description

① Foundation: the box culvert base and apron was used 350×350 R.C pile. Until now the RC pile foundation was almost completed in accordance with the Engineer ’s request on site

Pile construction

Excavation

Cut pile head

Bedding concrete

Rebar for culvert Base & side wall (50cm) Formwork for culvert Base & sidewall Concrete for Base & side wall

Rebar for Slab and side wall

Formwork for Slab & side wall

Concrete for Slab & side wall

Connection joint

Rebar for Wing wall

Formwork for Wing wall

Connection joint

Concrete for Wing wall

Apron Construction

Formwork dismantle

Backfilling

WORK SEQUENCE FOR BOX CULVERT

Approach slab

PROJECT: APPROACH ROAD OF CAN THO SIDE PACKAGE: 3 CONSULTANT: JV CONSULTANT CONTRCTOR: CSCEC

1/28/2015 Construction method of 14 box culvert_百度文库

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CONSULTANT: JV CONSULTANT CONTRCTOR: CSCEC

5

② Excavation:

Due to current condition on site, the work level after excavation is under the water level for all box

culverts. And the countermeasure for excavating under the water is necessary. The more detail

information refers to following table:

CONDATION OF WATER ELEVATION AT BOX CULVERT

1 K m 7 + 8 2 62 x 2 . 5 x 23 0 . 6 2 0 . 2 0 . 4 5 M a x l e v e l > 1 . 3 md r a i n a g e2 K m 8 + 8 9 02 x 2 . 5 x 23 8 . 7 0 . 5 5 0 . 1 M a x l e v e l > 1 . 3 md r a i n a g e

3 K m 9 + 3 2 62 x 2 . 5 x 1 . 52 4 . 1 0 . 2 5 2 0 . 3 9 8 M a x l e v e l > 1 . 3 md r a i n a g e

4 K m 9 + 6 2 02 x 2 . 5 x 1 . 53 0 . 9 2 0 . 2 6 4 0 . 3 8 6 M a x l e v e l > 1 . 3 md r a i n a g e

5 K m 1 0 + 3 1 02 x 2 . 5 x 23 0 . 2 1 0 . 8 2 5 0 . 1 7 5 M a x l e v e l > 1 . 3 md r a i n a g e

6 K m 1 0 + 6 9 02 x 2 . 5 x 1 . 52 4 . 1 0 . 1 6 9 0 . 4 8 1 M a x l e v e l > 1 . 3 md r a i n a g e

7 K m 1 0 + 9 5 02 x 2 . 5 x 1 . 52 4 . 1 0 . 2 8 9 0 . 3 6 1 M a x l e v e l > 1 . 3 md r a i n a g e

8 K m 1 1 + 4 5 12 x 2 . 5 x 1 . 52 4 . 1 0 . 5 9 3 0 . 0 5 7 M a x l e v e l > 1 . 3 md r a i n a g e

9 K m 1 1 + 6 9 02 x 2 . 5 x 1 . 52 4 . 1 0 . 7 0 5 0 . 0 5 5 M a x l e v e l > 1 . 3 md r a i n a g e

10 Km12+180 2x2.5 x2 32.9 0.7 0.05 Max level > 1.3m drainage

11 Km12+756 2x2.5 x2 28.53 0.7 0.05 Max level > 1.3m drainage

12 Km13+600 2x2.5 x1.5 24.1 0.374 0.276 Max level > 1.3m drainage13 Km14+450 2x2.5 x1.5 24.1 0.949 0.299 Max level > 1.3m drainage

14 Km14+890 2x2.5 x1.5 24.1 0.175 0.475 Max level > 1.3m drainage

B o t t o me l e v a t i o n

(m)r e m a r kN o . S t a t i o n S i z e ( m )l e n g t h(m)

E x c a v a t i o nl e v e l f o r b o xc u l v e r t ( m )

C u r r e n t w a tl e v e l i n F e b r u a r y

2 0 0 9 ( m )

According to site condition on every location, the Contractor will propose to apply two methods of

excavation under water for 14 box culvert. One method is driving steel piles (L=12m) for cofferdam

along with the bound of excavation. Other method will use the associated operation method of

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