CN110080111A - Cast-in-Situ Box Girders pre-pressing bracket construction method - Google Patents
Cast-in-Situ Box Girders pre-pressing bracket construction method Download PDFInfo
- Publication number
- CN110080111A CN110080111A CN201910319946.7A CN201910319946A CN110080111A CN 110080111 A CN110080111 A CN 110080111A CN 201910319946 A CN201910319946 A CN 201910319946A CN 110080111 A CN110080111 A CN 110080111A
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- Prior art keywords
- water tank
- water
- load
- pressing bracket
- construction
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The present invention provides a kind of Cast-in-Situ Box Girders pre-pressing bracket construction method, before pre-pressing bracket, beam bottom each section unwrapping wire piecemeal is numbered, determines the position of each load assignment；According to load assignment, water tank quantity needed for calculating each region；According to the water tank and water tank quantity of the applicable volume of the payload values of calculation on Construction and live site area selection；Water tank is hung and serves frame body, according to load assignment arrangement water tank location；It is filled the water step by step using water pump into water tank, carries out pre-pressing bracket load；It opens discharging valve and the water in water tank is released into unloading, in addition water tank, which hangs precompressed and shows sound, to be piled up for use, the method does not need manually to load weight, material is manually brought up into mast-up, load is pressed onto precompressed construction height with water with water pump, and pre- hydraulic water can recycle, environmentally protective.
Description
Technical field
The invention belongs to construction engineering technical fields, and in particular to a kind of Cast-in-Situ Box Girders pre-pressing bracket construction method.
Background technique
With the continuous accumulation of bridge construction experience, the work of Cast-in-Situ Box Girders pre-pressing bracket is proved to be very important.
Because the calculation formula for calculating bracket settling amount is that approximate, precision is limited.By the way that inelastic deformation can be eliminated after precompressed,
Obtain the accurate numerical value of flexible deformation.Cast-in-Situ Box Girders pre-pressing bracket is constructed at present, before pre-pressing bracket, by each portion of beam bottom
Divide unwrapping wire piecemeal number, sand hangs the mode sent using artificial pack, crane.The sand pocket for first hanging every a batch before sending and sending is hung to carry out
It weighs weighing, and places on record.Sandbag is hung serve frame after, manually stacked according to the load assignment situation of calculating.Precompressed is complete
Cheng Hou hangs the mode sent again by crane and is unloaded.Manpower is excessively relied in the construction of cast-in-place box beam bracket precompressed at present, is applied
Work complex steps, have seriously affected construction speed.
Summary of the invention
It is an object of the invention to reduce the workload of construction personnel, while simplifying the construction process of pre-pressing bracket, improves
Working efficiency.
Realize that foregoing invention purpose adopts the following technical scheme that
A kind of Cast-in-Situ Box Girders pre-pressing bracket construction method, follows the steps below:
1) surveying setting-out: before pre-pressing bracket, beam bottom each section unwrapping wire piecemeal is numbered, with the position of each load assignment of determination
It sets；
2) each regional water use amount distribution is calculated: according to load assignment, water tank quantity needed for calculating each region；
3) water tank is chosen: according to the water tank and water of the applicable volume of the payload values of calculation on Construction and live site area selection
Box number；
4) water tank lifts: hanging water tank according to calculated result and serves frame body, according to load assignment arrangement water tank location；
5) pre-pressing bracket loads: being filled the water using water pump into water tank, calculates water injection time, control load according to pump capacity
Size；
6) it unloads: opening discharging valve and release the water in water tank, water tank hangs frame top with crane, and rule piles up and gives over to next time
It uses.
In this method, the water tank is steel water tank or plastic cistern.Steel water tank field fabrication is convenient, the number of turnover
It is high；Plastic cistern size category is more, convenient transportation.
In above-mentioned construction procedure, loaded when precompressed load using precompressed step by step: the first order is loaded onto the 50% of gross weight,
Bottom plate, web reinforcement, presstressed reinforcing steel, internal model installation, the installation of top plate edge of a wing reinforcing bar and presstressed reinforcing steel are completed for simulating
Process, load consider by being distributed on bottom plate；The second level is loaded onto the 75% of gross weight, for simulating underplate concrete, oblique abdomen
Board concrete, top plate and edge of a wing board concrete pour to form the tunneling boring of certain construction gradient, at the same can simulate top,
Bottom, edge of a wing board concrete span centre section least favorable stress；Third level loading mode is loaded onto the 100% of gross weight, mould
Quasi- box beam concrete pours the situation of completion.
Water in water tank of the present invention is after the completion of precompressed is constructed for concrete curing, site operation water or scene drop
Dirt.
Beneficial effects of the present invention: this construction method does not need manually to load weight, and material is manually brought up to mast-up, and
It is that sand material is replaced with water, the filling restocking of water water pump is saved largely manually, used after precompressed compared with conventional construction method
Water energy recycles, environmentally protective, does not generate fugitive dust, meets green construction principle.Present invention production is simple and convenient to operate, can
Construction efficiency is greatly improved, is shortened the construction period, the use of material and mechanical equipment is reduced, cost is greatly saved.
Detailed description of the invention
Fig. 1 steel water tank Facad structure figure；
Fig. 2 is steel water tank side view；
Fig. 3 is steel water tank angle of depression figure.
Specific embodiment
Below to the detailed description of the invention:
It is existing
A kind of Cast-in-Situ Box Girders pre-pressing bracket construction method, follows the steps below:
1) surveying setting-out: before pre-pressing bracket, beam bottom each section unwrapping wire piecemeal is numbered, with the position of each load assignment of determination
It sets.
2) each regional water use amount distribution is calculated: according to load assignment, water tank quantity needed for calculating each region.
3) water tank is chosen: according to the water tank and water tank number of the applicable volume of the payload values of calculating and live site area selection
Amount.Water tank can be steel water tank or plastic cistern.Steel water tank field fabrication is convenient, and the number of turnover is high；Plastic cistern size
Type is more, convenient transportation.
4) water tank lift: water tank is hung according to calculated result and serves frame body, according to where branch arrange water tank.
5) pre-pressing bracket loads: being filled the water using water pump into water tank.Water injection time, control are calculated according to pump capacity
Load.
Multistage loadings are used when load, the first order is loaded onto the 50% of gross weight, this stage be mainly used for simulation complete bottom plate,
Web reinforcement, presstressed reinforcing steel, internal model installation, top plate edge of a wing reinforcing bar and presstressed reinforcing steel installation process, load is by uniformly distributed
In considering on bottom plate.
The second level is loaded onto the 75% of gross weight, this step simulations underplate concrete, skew web plate concrete, top plate and flange plate
Concrete, so that the tunneling boring for forming certain construction gradient pours, while also simulation top, bottom, edge of a wing board concrete are disconnected in span centre
The least favorable stress in face.
Third level loading mode is loaded onto the 100% of gross weight, the situation that simulation box beam concreting is completed.
6) it unloads: opening discharging valve and release the water in water tank, water tank hangs frame top with crane, and rule piles up and gives over to next time
It uses.The water that water tank is released, which is kept, can give over to concrete curing, site operation water or live depositing dust use.
Steel water tank used in the present invention is made of steel plate 1, reinforcing rib 2, hanging ring 3, water valve 4, steel plate and steel plate opposite side
Welding, institute's seam are fully welded using two-sided.Hanging ring, hanging ring and steel plate weld length are set at the top of steel water tank (even not less than 10d
Hanging ring uses 20 reinforcement fabrication of φ, it and steel plate weld length are greater than 200 millimeters).Steel water tank bottom sets water valve, and water valve uses
Ball valve.Steel water tank structure is as shown in Figs. 1-3.
The present invention does not need manually to load weight, and material is manually brought up to mast-up, but replaces sand material, water water with water
Filling restocking is pumped, compared with conventional construction method, saves largely manually, is recycled after precompressed with water energy, it is environmentally protective, no
Fugitive dust is generated, green construction principle is met.Present invention production is simple and convenient to operate, and can greatly improve construction efficiency, shortens work
Phase reduces the use of material and mechanical equipment, cost is greatly saved.
Claims (2)
1. a kind of Cast-in-Situ Box Girders pre-pressing bracket construction method, follows the steps below:
1) surveying setting-out: before pre-pressing bracket, beam bottom each section unwrapping wire piecemeal is numbered, with the position of each load assignment of determination；
2) each regional water use amount distribution is calculated: according to load assignment, water tank quantity needed for calculating each region；
3) water tank is chosen: according to the water tank and water tank number of the applicable volume of the payload values of calculation on Construction and live site area selection
Amount；
4) water tank lifts: hanging water tank according to calculated result and serves frame body, according to load assignment arrangement water tank location；
5) pre-pressing bracket loads: being filled the water using water pump into water tank, calculates water injection time according to pump capacity, control load is big
It is small；
6) it unloads: opening discharging valve and release the water in water tank, water tank hangs frame top with crane, and rule, which piles up to give over to, to be made next time
With.
2. Cast-in-Situ Box Girders pre-pressing bracket construction method according to claim 1, it is characterized in that: used when precompressed load
Precompressed loads step by step: the first order is loaded onto the 50% of gross weight, completes bottom plate, web reinforcement, presstressed reinforcing steel, internal model peace for simulating
The installation process of dress, top plate edge of a wing reinforcing bar and presstressed reinforcing steel, load consider by being distributed on bottom plate；The second level is loaded onto
The 75% of gross weight forms certain construction for simulating underplate concrete, skew web plate concrete, top plate and edge of a wing board concrete
The tunneling boring of gradient pours, at the same can simulate top, bottom, edge of a wing board concrete span centre section least favorable stress；The
Three-level loading mode is loaded onto the 100% of gross weight, the situation that simulation box beam concreting is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910319946.7A CN110080111A (en) | 2019-04-19 | 2019-04-19 | Cast-in-Situ Box Girders pre-pressing bracket construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910319946.7A CN110080111A (en) | 2019-04-19 | 2019-04-19 | Cast-in-Situ Box Girders pre-pressing bracket construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110080111A true CN110080111A (en) | 2019-08-02 |
Family
ID=67415767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910319946.7A Withdrawn CN110080111A (en) | 2019-04-19 | 2019-04-19 | Cast-in-Situ Box Girders pre-pressing bracket construction method |
Country Status (1)
| Country | Link |
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| CN (1) | CN110080111A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364759A (en) * | 2020-03-18 | 2020-07-03 | 重庆交通建设(集团)有限责任公司 | Prepressing device of full-scale support of giant open-web girder steel pipe and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101234558B1 (en) * | 2010-12-28 | 2013-02-19 | 재단법인 포항산업과학연구원 | Method for constructing a girder |
| CN103437291A (en) * | 2013-08-02 | 2013-12-11 | 中交二公局第一工程有限公司 | Integral water tank preloading construction process |
| CN206828968U (en) * | 2017-04-27 | 2018-01-02 | 吴增猛 | A kind of simple precompressed assembled water tank |
-
2019
- 2019-04-19 CN CN201910319946.7A patent/CN110080111A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101234558B1 (en) * | 2010-12-28 | 2013-02-19 | 재단법인 포항산업과학연구원 | Method for constructing a girder |
| CN103437291A (en) * | 2013-08-02 | 2013-12-11 | 中交二公局第一工程有限公司 | Integral water tank preloading construction process |
| CN206828968U (en) * | 2017-04-27 | 2018-01-02 | 吴增猛 | A kind of simple precompressed assembled water tank |
Non-Patent Citations (2)
| Title |
|---|
| 梁文雨: ""水压法在现浇箱梁支架体系预压中运用"", 《低温建筑技术》 * |
| 王刚: "" 浅谈现浇梁满堂支架法水箱预压技术"", 《建筑安全》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111364759A (en) * | 2020-03-18 | 2020-07-03 | 重庆交通建设(集团)有限责任公司 | Prepressing device of full-scale support of giant open-web girder steel pipe and construction method thereof |
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| PB01 | Publication | ||
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Application publication date: 20190802 |