CN106400689A - Sealed water bag prepressing construction technology - Google Patents
Sealed water bag prepressing construction technology Download PDFInfo
- Publication number
- CN106400689A CN106400689A CN201610820649.7A CN201610820649A CN106400689A CN 106400689 A CN106400689 A CN 106400689A CN 201610820649 A CN201610820649 A CN 201610820649A CN 106400689 A CN106400689 A CN 106400689A
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- CN
- China
- Prior art keywords
- sealed water
- water bag
- construction technology
- precompressed
- box beam
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- 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)
- Revetment (AREA)
Abstract
The invention discloses a sealed water bag prepressing construction technology. According to the method, a completed box girder support and a bottom formwork are paved with a plurality of sealed water bags, loading, static loading and unloading are carried out on the empty sealed water bags according to a designed scheme, testing can be carried out on the box girder support under different loads, and therefore problems can be found, and the post-building safety of the box girder support is improved. According to the sealed water bag prepressing construction technology, load testing is achieved through the multiple sealed water bags, paving is convenient, the sealed water bags can be reused to reduce the cost, a water pump is used for carry out water filling and draining on the sealed water bags, and the labor intensity of workers is relieved.
Description
Technical field
The present invention relates to bridge construction field, more particularly to a kind of sealed water bag precompressed construction technology.
Background technology
In bridge construction, need in advance box beam bracket to be carried out weight precompressed, the main purpose of precompressed is for checking meter
Calculate and analyze elastic deformation and the inelastic deformation of box beam bracket, accurately to make the construction height of bottom die of box-beam according to design height
Journey and sedimentation value are it is ensured that bottom after the completion of box beam bracket construction, rising and meet design requirement with line style, and can check box beam simultaneously
Support by force intensity, rigidity and uniformity, globality and safety.
The bridge box and beam pre-pressing bracket construction method commonly used at present has sandbag preloading method and prefabricated section preloading method, these box beams
Pre-pressing bracket construction technology is relatively costly and high labor intensive, construction period are longer.For above-mentioned situation, also have at present using more
Easy monoblock type water tank pre-pressing process, but the method preparation is cumbersome, distribution of weight is wayward and integrated water tank one
Denier go wrong harm larger.
Content of the invention
It is an object of the invention to provide a kind of sealed water bag precompressed construction technology, realized fast with the box beam bracket to bridge
Speed, accurately measurement and debugging.
Its technical scheme is to comprise the steps：
(1) the area sum amount according to pre- pressure surface calculates quantity and the placement location of the sealed water bag needing laying；
(2) according to result of calculation, sealed water bag is placed on pre- pressure surface；
(3) hierarchical loading, static load and unloading are carried out to sealed water bag；Each the points of measurement is measured according to design simultaneously
Value, and from checking the situation of change of pre- pressure surface in appearance, then ANOMALOUS VARIATIONS is processed according to prediction scheme.
Above-mentioned pre- pressure surface is the box beam bracket of bridge.
Preferred as such scheme, observation station described in step (3) be arranged on each span centre across box beam bracket, 1/4
Across, box beam bracket top and bottom, before and after box beam bracket loading being carried out using level gauge during observation, hierarchical loading, uninstall process
The absolute altitude observation of middle control point；Amount of elastic deformation according to precompressed data calculating support and ground and inelastic deformation amount.
Described elastic deformation amount is the high difference with top of support absolute altitude during 100% load of unloading after-poppet top mark；Non-resilient change
Shape amount is the high difference high with unloading after-poppet top mark of precompressed fore-stock top mark.
Preferred as such scheme, described loading is that described sealed water bag is poured water, until it reaches design
The highest load weight requiring；Described static load is to keep specifying the time by current state by the sealed water bag under highest load weight
Section；Described unloading is to carry out complete draining to the sealed water bag under highest load weight.
Preferred as such scheme, in described step (3), after hierarchical loading to precompressed design load, hold the lotus time
At least 24h, and carry out the Continuous Observation of support, described hierarchical loading, unloading press box beam casting load gross weight 0,50%,
100%th, 120%, 0 successively classification loaded and unloaded.
Preferred as such scheme, in described step (1), during the quantity of calculating sealed water bag, it is to be propped up with described box beam
Calculate based on the underplate concrete weight of frame.
Preferred as such scheme, described sealed water bag is processed into using rubber or PVC, single described sealed water bag
Deadweight fills the ratio of the weight after water for 1 with it：400～1：600.
Preferred as such scheme, the opposite end of described sealed water bag is respectively arranged with inlet valve.
Preferred as such scheme, multiple described sealed water bags are tight successively in the way of diameter parallel in radial directions
It is placed with and puts, each in the axial direction described sealed water bag is spaced apart and spacing distance is at least above 20 centimetres.
Preferred as such scheme, be provided with fixing band with the bag of described sealed water bag, each described sealed water bag it
Between be connected with each other by described fixing band；The surrounding of the described sealed water bag after putting is provided with prevents described sealed water bag from rolling
Stop flitch or sandbag.
Preferred as such scheme, described pre- pressure surface can also be road surface with soft subgrade.
The present invention is held in place on the base plate on box beam bracket using multiple sealed water bags and carries out load test it is only necessary to water
Pump can complete whole loading procedure, and only sealed water bag need to be pressed design attitude and place and can water-filling load, and greatlys save
Time and labour force, compare the traditional approach workload of 7 days, this method can complete for 1 day.In addition the present embodiment can also subtract
Workload during few once lifting, thus reduce danger coefficient.Stablizing of sealed water bag itself can be improved using rectangular configuration
Property.
Brief description
Fig. 1 is the placement schematic diagram of prepressing device according to an embodiment of the invention；
Fig. 2 is the side view shown in figure.
Specific embodiment
Below using the box beam bracket of bridge as pre- pressure surface pass through specific embodiment and combine accompanying drawing the present invention is done into
The detailed description of one step.
The preloading method of the present invention comprises the steps in general manner：
(1) complete the construction of the box beam bracket of bridge according to design, calculate the sealed water bag needing laying simultaneously
Quantity and placement location；
In this step, need to consider area and the load of box beam bracket, and can after combination corresponding with above-mentioned parameter
Reach corresponding test purpose sealed water bag quantity.The distribution of plurality of sealed water bag is according to the unit plane of the width of box beam bracket
Amass and uniformly placed.
(2) dress watch is carried out to the box beam bracket after the completion of construction；
In this step, in addition it is also necessary to security inspection is carried out to box beam bracket before placing sealed water bag, and to box beam bracket
It is cleaned operating, to have avoided sharp objects to damage sealed water bag.
(3) according to result of calculation, sealed water bag is placed on box beam bracket；
In this step, the weight that load test requires is to be calculated based on the weight of the underplate concrete of box beam bracket
, and wing plate and crossbeam be not in the row of calculating.
(4) according to water source location arrangements water pump with the water pipe that is connected with each sealed water bag；
In this step, water pump will be connected using water pipe one end, one end connects the inlet valve of sealed water bag, has first debugged water
Pump rotating, is loaded at times by load after connecting and carries out security viewpoint survey.
(5) hierarchical loading, static load and unloading are carried out respectively to sealed water bag according to design；Simultaneously according to design
Measure each observation station numerical value, and from checking connector situation of change between box beam bracket, template in appearance, then processed according to prediction scheme
ANOMALOUS VARIATIONS.
Loading in this step is that sealed water bag is poured water, until it reaches the highest load weight that design requires
Amount.Static load in this step is to keep specifying the time period by current state by the sealed water bag under highest load weight.Therein
The specified time is defined by the requirement of design, such as requires to test 24 hours, then discharge water after keeping 24 hours it is desirable to be 48 little again
When, then discharge water again after keeping 48 hours.Unloading in this step refers to that the sealed water bag under highest load weight is arranged completely
The operation of water.
In this step, after hierarchical loading to precompressed design load, hold lotus time at least 24h, and carry out the continuous sight of support
Survey, described hierarchical loading, unloading are classified successively by 0,50%, 100%, 120%, the 0 of box beam casting load gross weight and are loaded
And unloading.
In this step, described observation station is arranged on each span centre across box beam bracket, 1/4 across, box beam bracket top and bottom
Portion, absolute altitude observation in control point before and after box beam bracket loading being carried out using level gauge during observation, in hierarchical loading, uninstall process；Root
Amount of elastic deformation and inelastic deformation amount according to precompressed data calculating support and ground.
The preloading method of the present embodiment is completed using multiple sealed water bags it is not necessary to substantial amounts of lifting operation, eliminates and hangs
Dress hidden danger, and each sealed water bag is adopted and is used water as load medium, does not have the dust pollution of sand or great soil group.Each sealed water bag can
To realize fill step by step, it is convenient for measuring state under different loads for the box beam bracket.DATA REASONING includes the bullet to box beam bracket
Property deflection and the calculating of inelastic deformation amount, wherein, elastic deformation amount is that after water in sealed water bag arranges light completely, box beam is propped up
The high difference of the high top mark with box beam bracket when fullcharging carries of the top mark of frame；Rather than elastic deformation amount is box beam bracket pre- means of press seals water
The high difference of the high top mark arranged with box beam bracket after the water in light sealed water bag of top mark before bag.
Wherein, during the quantity of calculating sealed water bag, calculated based on the underplate concrete weight of described box beam bracket.
As shown in Figure 1, 2, the sealed water bag 20 that the present embodiment uses has multiple, and the opposite end in each sealed water bag
It is respectively arranged with inlet valve 21, the cross sectional shape after this sealed water bag 20 is full of water can be rectangle.The present embodiment is using many
Carry out load test it is only necessary to water pump can complete whole adding on the bed die 10 that individual sealed water bag 20 is held in place on box beam bracket
Load process, and only sealed water bag 20 need to be pressed design attitude and place and can water-filling load, greatly save time and labour force,
Compare the traditional approach workload of 7 days, this method can complete for 1 day.In addition the present embodiment can also reduce during once lifting
Workload, thus reduce danger coefficient.Sealed water bag 20 stability of itself can be improved using rectangular configuration.
Further, in one embodiment of the invention, this sealed water bag 20 employing can improve whole sealing
The rubber of water bag 20 intensity or PVC are processed into.The processing charges manufacturing sealed water bag 20 first can be reduced by this way, and
Sealed water bag 20 can have enough to meet the need repeatedly, and final actual cost just corresponds to 1/3rd of traditional approach.Single sealed water bag
The weight ratio at least 1 after water is filled in 20 deadweight with it：400～1：600.Deadweight as single sealed water bag 20 is 250 public affairs
Jin, filling the weight after water is 100-150 ton.This structure big from heavy and light capacity is easier to the precompressed purpose of box beam bracket
Realize.
In a further embodiment of the present invention, the inlet valve 21 of this sealed water bag 20 can be arranged on sealing water
The two ends of bag 20 major axis.Such structure is more conducive to keep stablizing of sealed water bag 20.
For convenience of the operation of the inlet valve 21 to each sealed water bag 20, in one embodiment of the invention, when multiple
When sealed water bag 20 is placed on bed die 10, diametrically each sealed water bag 20 can be close to put in the way of diameter parallel successively
Put, and each in the axial direction sealed water bag 20 can be spaced apart and spacing distance is at least above 20 centimetres.Because sealed water bag 20
When pouring water, can be carried out by its inlet valve 21 using water pipe by water pump, therefore suitable interval facilitates the later stage to close
Pouring water of water shutoff bag 20 is moved with drain operation and after avoiding sealed water bag 20 fill again.
Further, for improving the stability of sealed water bag 20, in one embodiment of the invention, this sealed water bag 20
Bag with fixing band 22 can be set, can be connected with each other by fixing band 22 between each sealed water bag 20 after placement, with
Avoid sealed water bag 20 pour water or drainage procedure in roll.In other embodiments, can also be in the sealing after putting
The surrounding setting of water bag 20 prevents stop flitch or the sandbag (not shown) of sealed water bag 20 rolling.By stop flitch or
Single or multiple sealed water bags 20 can be limited in current position by sandbag, thus improving the safety in pre-compaction process.
Meanwhile, the pre- pressure surface in the sealed water bag precompressed construction technology in above-described embodiment can also be road surface with soft subgrade.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (12)
1. a kind of sealed water bag precompressed construction technology, comprises the steps：
(1) the area sum amount according to pre- pressure surface calculates quantity and the placement location of the sealed water bag needing laying；
(2) according to result of calculation, sealed water bag is placed on pre- pressure surface；
(3) hierarchical loading, static load and unloading are carried out to sealed water bag；Each observation station numerical value is measured according to design simultaneously, and
From the situation of change checking pre- pressure surface in appearance, then ANOMALOUS VARIATIONS is processed according to prediction scheme.
2. sealed water bag precompressed construction technology according to claim 1 it is characterised in that：Described pre- pressure surface is the case of bridge
Boom support.
3. sealed water bag precompressed construction technology according to claim 2 it is characterised in that：Observation station described in step (3)
Be arranged on each span centre across box beam bracket, 1/4 across, box beam bracket top and bottom, during observation, box beam is carried out using level gauge
Observation station absolute altitude observation before and after support loads, in hierarchical loading, uninstall process；Calculate the bullet of support and ground according to precompressed data
Property deformation quantity and inelastic deformation amount.
4. sealed water bag precompressed construction technology according to claim 3 it is characterised in that：Described elastic deformation amount is unloading
The high difference with top of support absolute altitude during 100% load of after-poppet top mark；Inelastic deformation amount is precompressed fore-stock top mark height and unloading
The high difference of after-poppet top mark.
5. sealed water bag precompressed construction technology according to claim 3 it is characterised in that：Described loading is to described sealing
Water bag is poured water, until it reaches the highest load weight that design requires；Described static load is by under highest load weight
Sealed water bag is pressed current state and is kept specifying the time period；Described unloading is that the sealed water bag under highest load weight is carried out completely
Draining.
6. sealed water bag precompressed construction technology according to claim 3 it is characterised in that：In described step (3), classification
After being loaded onto precompressed design load, hold lotus time at least 24h, and carry out the Continuous Observation of support, described hierarchical loading, unloading are pressed
0,50%, 100%, 120%, the 0 of box beam casting load gross weight is classified successively and is loaded and unload.
7. sealed water bag precompressed construction technology according to claim 3 it is characterised in that：In described step (1), calculate close
During the quantity of water shutoff bag, it is to be calculated based on the underplate concrete weight of described box beam bracket.
8. preloading method according to claim 2 it is characterised in that：Described sealed water bag adopts rubber or PVC processing system
Become, single described sealed water bag deadweight fills the ratio of the weight after water for 1 with it：400～1：600.
9. sealed water bag precompressed construction technology according to claim 7 it is characterised in that：Relatively the two of described sealed water bag
End is respectively arranged with inlet valve.
10. sealed water bag precompressed construction technology according to claim 8 it is characterised in that：Multiple described sealed water bags exist
It is close to successively in the radial direction place in the way of diameter parallel, each in the axial direction described sealed water bag is spaced apart and spacer
From at least above 20 centimetres.
11. sealed water bag precompressed construction technologies according to claim 9 it is characterised in that：The bag body of described sealed water bag
On be provided with fixing band, be connected with each other by described fixing band between each described sealed water bag；Described sealed water bag after putting
Surrounding be provided with stop flitch or the sandbag preventing that described sealed water bag from rolling.
12. sealed water bag precompressed construction technologies according to claim 1 it is characterised in that：Described pre- pressure surface can also be
Road surface with soft subgrade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610820649.7A CN106400689A (en) | 2016-09-13 | 2016-09-13 | Sealed water bag prepressing construction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610820649.7A CN106400689A (en) | 2016-09-13 | 2016-09-13 | Sealed water bag prepressing construction technology |
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| CN106400689A true CN106400689A (en) | 2017-02-15 |
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ID=58000062
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| CN201610820649.7A Pending CN106400689A (en) | 2016-09-13 | 2016-09-13 | Sealed water bag prepressing construction technology |
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Cited By (6)
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|---|---|---|---|---|
| CN108225896A (en) * | 2018-03-18 | 2018-06-29 | 中铁十九局集团第三工程有限公司 | No. 0 segment bracket static loading prepressing test device of cast-in-situ continuous beam and test method |
| CN108824210A (en) * | 2018-07-20 | 2018-11-16 | 中交路桥华南工程有限公司 | The preloading method of bridge bracket |
| CN108978483A (en) * | 2018-08-23 | 2018-12-11 | 中交路桥建设有限公司 | Mix girder stayed-cable bridge concrete box girder steel pipe support joint preloading method |
| CN109487653A (en) * | 2018-09-25 | 2019-03-19 | 中交公局桥隧工程有限公司 | A kind of construction technology carrying out roadbed precompressed using water bag |
| CN109667227A (en) * | 2019-01-24 | 2019-04-23 | 中建新疆建工土木工程有限公司 | Overpass Cast-in-situ Beam strutting system water bag precompressed construction technology and its equipment |
| CN110080116A (en) * | 2019-05-30 | 2019-08-02 | 甘肃路桥建设集团有限公司 | A kind of large-span prestressed bent cap supporting apparatus and its construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225896A (en) * | 2018-03-18 | 2018-06-29 | 中铁十九局集团第三工程有限公司 | No. 0 segment bracket static loading prepressing test device of cast-in-situ continuous beam and test method |
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| CN108978483A (en) * | 2018-08-23 | 2018-12-11 | 中交路桥建设有限公司 | Mix girder stayed-cable bridge concrete box girder steel pipe support joint preloading method |
| CN108978483B (en) * | 2018-08-23 | 2020-03-10 | 中交路桥建设有限公司 | Combined prepressing method for concrete box girder steel pipe support of hybrid beam cable-stayed bridge |
| CN109487653A (en) * | 2018-09-25 | 2019-03-19 | 中交公局桥隧工程有限公司 | A kind of construction technology carrying out roadbed precompressed using water bag |
| CN109667227A (en) * | 2019-01-24 | 2019-04-23 | 中建新疆建工土木工程有限公司 | Overpass Cast-in-situ Beam strutting system water bag precompressed construction technology and its equipment |
| CN110080116A (en) * | 2019-05-30 | 2019-08-02 | 甘肃路桥建设集团有限公司 | A kind of large-span prestressed bent cap supporting apparatus and its construction method |
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Effective date of registration: 20180518 Address after: 430300 Tangjia 100, long Song Village, Shekou street, Huangpi District, Wuhan, Hubei Applicant after: Wuhan speed anda building rubber products Co., Ltd. Address before: 430063 Yangyuan new village, 980 Heping Road, Wuchang District, Wuhan, Hubei, B1-2-301 Applicant before: Chen Kai |
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Application publication date: 20170215 |