CN105369738B - Prepressing method of flushing type bridge rubber raft - Google Patents
Prepressing method of flushing type bridge rubber raft Download PDFInfo
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- CN105369738B CN105369738B CN201510662221.XA CN201510662221A CN105369738B CN 105369738 B CN105369738 B CN 105369738B CN 201510662221 A CN201510662221 A CN 201510662221A CN 105369738 B CN105369738 B CN 105369738B
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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
-
- 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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a prepressing method of a flushing type bridge rubber raft. The prepressing method comprises the following steps: (1) preparatory work; (2) water bag arrangement: marking out in a bottom plate pressure test region according to the sizes and quantity of water bags in the scheme; and sequentially placing the water bags from the low end of a box girder bottom plate to the high end of the box girder bottom plate; (3) measuring tool mounting: mounting a water meter, which is used for recording the amount of delivered water, on a main pipe of each water point, assigning a designated person to each water point for recording data during step loading and adding the amounts of water of the water points to reach a prepressing value; (4) water source connection; and (5) step loading: stacking the water bags of which the weight is 1.2 times the load of a girder span on an erected support according to weight distribution conditions of girder section concrete just above the support, carrying out step prepressing for 72 hours, and observing subsidence by using a level gauge. By the prepressing method of the flushing type bridge rubber raft, continuous prepressing of the flushing type bridge rubber raft and recycling of water can be realized, and the cost-performance ratio is high.
Description
Technical field
The invention belongs to cast-in-situ prestressed concrete box beam bracket precompressed technical field of construction is and in particular to a kind of flushing type
The preloading method of bridge rubber raft.
Background technology
Traditional cast-in-place box beam pre-pressing bracket typically adopts the larger closely knit materials of proportion such as stone, sand pocket or reinforcing bar
Material, but above-mentioned material carries out precompressed and is both needed to rely on larger transport devices and crane gear, and material deposit temporarily, unload after stack
All need the long period, occupy a large amount of planes, affect normal construction flowing water, especially in a large amount of construction of municipal science of bridge building, occupy
Construction plane is a great problem.Also the traffic to urban district brings adverse effect.And box beam precompressed is carried out using water bag and exactly can
Enough solve above-mentioned institute contradictory, greatly reduce the engineering time, can fetch water on the spot in the wild, to water source quality no requirement (NR).?
Can be nearby using urban water supply in municipal works；Water bag precompressed is almost not required to bulk transport and crane gear；It is not required to take greatly
Amount place, with unload with shipment walk the advantages of.
Content of the invention
The technical problem to be solved is: provides a kind of easy construction, the flushing type bridge rubber raft of low cost
Preloading method, the method can obtain relevant parameter by water bag precompressed cast-in-place box beam support, eliminate ground simultaneously
The extruding of rod member joint and the inelastic deformation dropping equipment compression and producing after sedimentation after base stand under load and stand under load.Pass through
Precompressed obtains empirical parameter, provides data supporting for next step box beam setting camber.
To achieve these goals, the technical scheme is that the preloading method of flushing type bridge rubber raft, it includes
Following steps:
(1) preparation: water bag precompressed box beam scaffold, I-steel, flitch, glued board are set up, and settlement observation point is arranged,
Must box beam scaffold, support and template apply for checking and examination qualified after can implement precompressed.By construction requirement precompressed water bag size by factory
Family's customization, water bag wall thickness adopts 1.2mm.The specification of water bag is 10 × 5 (6) × 3 meters, and (single water bag weight standard is respectively 120t
And 150t))
(2) water bag arrangement: the water bag size and number according to scheme are rule in base plate pressure testing region；Water bag is by box beam bottom
Plate low side is sequentially placed to high-end；When water bag is placed, in low side, water inlet is high-end for delivery port.This engineering use 10 × 5 (6) ×
The water bag of 3 meters of (single water bag 120t, 150t) specifications carries out precompressed.
(3) measurer is installed: loads onto water meter on the main of each dry point, for record conveying water yield quantity, in classification
Arrange special messenger's record in each water spot during loading, and each dry point water yield is added arrival precompressed value.
(4) water source connects: water pump, shunt valve, a point water bag water pipe is coupled together, water pump is positioned in ditch and (or connects
Running water pipe), drawn water with facilitating.
(5) hierarchical loading: preloading method is according to beam section concrete distribution of weight situation directly over support, heap on the support put up
Put the water bag of 1.2 times of girder span load and using classification precompressed, squeeze time totally 72 hours, observe settling amount with spirit level.Start 4
Hour was observed every 1 hour；It was observed every 4 hours within 8 hours afterwards；It was observed every 6 hours within last 12 hours.See
Survey content and include the observation to precompressed observation station (see accompanying drawing 2: precompressed observation station layout drawing) and the deformation sight of main supporting member
Survey, and check whether support element, weld seam etc. exception, stop precompressed immediately if any abnormal, carry out consolidation process, confirm no
After potential safety hazard, it is further continued for precompressed.After the completion of loading, support day settling amount is controlled to cannot be greater than 2.0 millimeters (without measurement by mistake
Difference), general beam section squeeze time is three days.One water meter is arranged on same size water bag in order to control the amount of pouring into.Divide three-level
60%, 80%, 100%；I.e. 60% weight of 1.2 times of girder span load, 80% weight and 100% weight carry out being classified precompressed,
Three-level precompressed totally 72 hours, every one-level precompressed is all 24 hours.
(6) settlement observation point setting requirements: settlement observation point along span of bridge structure longitudinally every 1/4 span setting one
Individual measuring frequency section；On each measuring frequency section, the observation station of arrangement should not be less than 5, and is arranged symmetrically；Precompressed weight is not less than
1.20 times of box beam gross weight, hierarchical loading, measure deformation values and the foundation settlement value of load lower carriages at different levels respectively.Settlement observation
Should must carry out First Observation through the whole process loading and unload before starting to load, as the zero point of settlement observation,
Then add the first subordinate load, observe again immediately after loading, draw the settlement of foundation after applying the first subordinate load, deformation of timbering；
Observe again before applying the second subordinate load, then apply the second subordinate load and exist side by side to observe, show that the ground after the second subordinate load sinks
Fall, deformation of timbering；Observe again before applying third time load, then apply third time load and observe immediately.Observation is operated in pre-
Carry out always in the pressure time, until sedimentation tends towards stability.Load and unloading must be carried out in whole precompressed scope internal classification, often
Level loads and unloading all should measure and record in detail, after the completion of precompressed terminates unloading, according to ground settlement observation record, props up
Frame deformation observation record, determines form height, arranges camber.
(7) precompressed monitoring: measure monitoring point absolute altitude after loading pre-test monitoring point absolute altitude, every grade of loading, be loaded onto 100%
Afterwards at interval of 6h measurement monitoring point absolute altitude after 24h measurement monitoring point absolute altitude, unloading；Load and unloading must be in whole precompressed scope
Internal classification is carried out, and every grade of loading and unloading all should measure and record in detail, after the completion of precompressed terminates unloading, is sunk according to ground
Fall observational record, deformation of timbering record, determine form height, camber is set.
This method is after the completion of box beam bracket, model sheetinstallat, discharges water bag on bed die upper berth, is required point according to upper load
Level loads and carries out pre-pressing bracket, measures corresponding elevation after every grade of loading, reaches water bag unloading after pre-pressing bracket effect, proceeds to lower road
Operation.
The invention has the beneficial effects as follows:
(1) present invention can make flushing type bridge rubber raft realize recycling of continuous precompressed and water, and cost performance is high；
(2) can avoid using main equipment using water bag precompressed, save construction site, reduce the impact to traffic；
(3) press the customization of project demand size, reduce live process time, reduce lifting squeeze time；
(4) because the density of water is 1, weight is directly perceived, accurate measurement；Accomplish maximum saving in water intaking with waterborne；
(5) discharge rate after precompressed is completed using the method fast；
(6) with regenerated resources as raw material, can 100% recycling, meet national low-carbon green science development model.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is settlement observation point arrangement schematic diagram；
In figure: 1- box beam scaffold, 2- hound, 3- encrypts bar, 4- scaffold board, 5- I-steel, 6- flitch, and 7- is glued
Plate, 8- water bag, 9- settlement observation point.
Specific embodiment
As shown in accompanying drawing 1,2, the prepressing device of flushing type bridge rubber raft, including box beam scaffold 1, in box beam scaffold
On 1, it is disposed with the bed die of I-steel 5, flitch 6 and glued board 7 trilaminate material composition from bottom to top, be provided with below bed die tiltedly
Strut 2, is provided with encryption bar 3 in bed die both sides, and bed die is placed with water bag 8, and encryption bar both sides are provided with scaffold board 4.
The preloading method of flushing type bridge rubber raft, it comprises the steps:
(1) preparation: water bag precompressed box beam scaffold 1, I-steel 5, flitch 6, glued board 7 are set up, settlement observation point 9
Arrangement it is necessary to box beam scaffold 1, support and template apply for checking and examination qualified after can implement precompressed.By construction requirement precompressed water bag 8 chi
Very little customized by producer, water bag wall thickness adopts 1.2mm.
(2) water bag arrangement: the water bag size and number according to scheme are rule in base plate pressure testing region；Water bag 8 is by box beam
Base plate low side is sequentially placed to high-end；When water bag 8 is placed, in low side, water inlet is high-end for delivery port.This engineering uses water bag 8
Specification is 10 × 5 × 3 meters and 10 × 6 × 3 meters, and single water bag is respectively 120t and 150t and carries out precompressed.
(3) measurer is installed: loads onto water meter on the main of each dry point, for record conveying water yield quantity, in classification
Arrange special messenger's record in each water spot during loading, and each dry point water yield is added arrival precompressed value.
(4) water source connects: water pump, shunt valve, a point water bag water pipe is coupled together, water pump is positioned in ditch and (or connects
Running water pipe), drawn water with facilitating.
(5) hierarchical loading: preloading method is according to beam section concrete distribution of weight situation directly over support, heap on the support put up
Put the water bag of 1.2 times of girder span load and using classification precompressed, squeeze time totally 72 hours, observe settling amount with spirit level.Start 4
Hour was observed every 1 hour；It was observed every 4 hours within 8 hours afterwards；It was observed every 6 hours within last 12 hours.See
Survey content to include to the observation of precompressed observation station 9 (see precompressed observation station layout drawing) and the deformation observation of main supporting member, and
Check whether support element, weld seam etc. exception, stop precompressed immediately if any abnormal, carry out consolidation process, confirm no safe
After hidden danger, it is further continued for precompressed.After the completion of loading, support day settling amount is controlled to cannot be greater than 2.0 millimeters (without measure errors), one
As beam section squeeze time be three days.One water meter is arranged on same size water bag in order to control the amount of pouring into.Divide three-level 60%,
80%, 100%；I.e. 60% weight of 1.2 times of girder span load, 80% weight and 100% weight carry out being classified precompressed, and three-level is pre-
Pressure totally 72 hours, every one-level precompressed is all 24 hours.
(6) settlement observation point setting requirements: settlement observation point along span of bridge structure longitudinally every 1/4 span setting one
Individual measuring frequency section；On each measuring frequency section, the observation station of arrangement should not be less than 5, and is arranged symmetrically；Precompressed weight is not less than
1.20 times of box beam gross weight, hierarchical loading, measure deformation values and the foundation settlement value of load lower carriages at different levels respectively.Settlement observation
Should must carry out First Observation through the whole process loading and unload before starting to load, as the zero point of settlement observation,
Then add the first subordinate load, observe again immediately after loading, draw the settlement of foundation after applying the first subordinate load, deformation of timbering；
Observe again before applying the second subordinate load, then apply the second subordinate load and exist side by side to observe, show that the ground after the second subordinate load sinks
Fall, deformation of timbering；Observe again before applying third time load, then apply third time load and observe immediately.Observation is operated in pre-
Carry out always in the pressure time, until sedimentation tends towards stability.Load and unloading must be carried out in whole precompressed scope internal classification, often
Level loads and unloading all should measure and record in detail, after the completion of precompressed terminates unloading, according to ground settlement observation record, props up
Frame deformation observation record, determines form height, arranges camber.
(7) precompressed monitoring: measure monitoring point absolute altitude after loading pre-test monitoring point absolute altitude, every grade of loading, be loaded onto 100%
Afterwards at interval of 6h measurement monitoring point absolute altitude after 24h measurement monitoring point absolute altitude, unloading；Load and unloading must be in whole precompressed scope
Internal classification is carried out, and every grade of loading and unloading all should measure and record in detail, after the completion of precompressed terminates unloading, is sunk according to ground
Fall observational record, deformation of timbering record, determine form height, camber is set.
This method is after the completion of box beam bracket, model sheetinstallat, discharges water bag on bed die upper berth, is required point according to upper load
Level loads and carries out pre-pressing bracket, measures corresponding elevation after every grade of loading, reaches water bag unloading after pre-pressing bracket effect, proceeds to lower road
Operation.
Claims (1)
1. a kind of preloading method of flushing type bridge rubber raft is it is characterised in that comprise the steps:
(1) preparation: water bag precompressed box beam scaffold, I-steel, flitch, glued board are set up, settlement observation point arrangement it is necessary to
Box beam scaffold, support and template apply for checking and examination qualified after can implement precompressed；The wall thickness of precompressed water bag adopts 1.2mm；
(2) water bag arrangement: the water bag size and number according to scheme are rule in base plate pressure testing region；Water bag is low by box beam base plate
Hold and be sequentially placed to high-end；When water bag is placed, in low side, water inlet is high-end for delivery port；The specification of water bag be 10 × 5 × 3 meters or
10 × 6 × 3 meters, single water bag weight is 120t or 150t；
(3) measurer install: water meter is loaded onto on the main of each dry point, for record conveying the water yield, in hierarchical loading
Each dry point arranges special messenger's record, and each dry point water yield is added arrival precompressed value；
(4) water source connects: water pump, shunt valve, a point water bag water pipe is coupled together, water pump is positioned in ditch or connects running water
Pipe, is drawn water with facilitating；
(5) hierarchical loading: preloading method, according to beam section concrete distribution of weight situation directly over support, stacks beam on the support put up
Across 1.2 times of load water bag and using classification precompressed, squeeze time totally 72 hours, observe settling amount with spirit level；Start 4 hours
It was observed every 1 hour；It was observed every 4 hours within 8 hours afterwards；It was observed every 6 hours within last 12 hours；In observation
Hold and include to the observation of precompressed observation station and the deformation observation of main supporting member, and check whether support element, weld seam etc. go out
Now abnormal, stop precompressed immediately if any abnormal, carry out consolidation process, after confirmation no potential safety hazard, be further continued for precompressed；Loading completes
Afterwards, support day settling amount is controlled to cannot be greater than 2.0 millimeters, beam section squeeze time is three days；One is arranged on same size water bag
Water meter is in order to control the amount of pouring into；Point three-level 60%, 80%, 100%；I.e. 60% weight of 1.2 times of girder span load, 80% weight
Amount and 100% weight carry out being classified precompressed, three-level precompressed totally 72 hours, and every one-level precompressed is all 24 hours；
(6) settlement observation point setting requirements: settlement observation point is seen for along the longitudinal direction of span of bridge structure every 1/4 span setting
Survey section；On each measuring frequency section, the observation station of arrangement should not be less than 5, and is arranged symmetrically；Precompressed weight is not less than box beam
1.20 times of gross weight, hierarchical loading, measure deformation values and the foundation settlement value of load lower carriages at different levels respectively；Settlement observation runs through
In load and unloading whole process, carry out First Observation before starting to load, as the zero point of settlement observation, then add the
One subordinate load, observes after loading immediately again, draws the settlement of foundation after applying the first subordinate load, deformation of timbering；Apply second
Observe again before load, then apply the second subordinate load and exist side by side to observe, show that the settlement of foundation after the second subordinate load, support become
Shape；Observe again before applying third time load, then apply third time load and observe immediately；Observation is operated in one in squeeze time
Straight row, until sedimentation tends towards stability；Load and unloading must be carried out in whole precompressed scope internal classification, every grade loads and unloads
Carry and all measure and record in detail, after the completion of precompressed terminates unloading, according to ground settlement observation record, deformation of timbering observation note
Record, determines form height, arranges camber；
(7) precompressed monitoring: load pre-test monitoring point absolute altitude, every grade load after measurement monitoring point absolute altitude, be loaded onto 100% after every
6h measurement monitoring point absolute altitude after interval 24h measurement monitoring point absolute altitude, unloading；Load and unloading must divide in the range of whole precompressed
Level is carried out, and every grade of loading and unloading all measure and record in detail, after the completion of precompressed terminates unloading, according to ground settlement observation
Record, deformation of timbering record, determine form height, camber is set.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510662221.XA CN105369738B (en) | 2015-10-08 | 2015-10-08 | Prepressing method of flushing type bridge rubber raft |
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| CN201510662221.XA CN105369738B (en) | 2015-10-08 | 2015-10-08 | Prepressing method of flushing type bridge rubber raft |
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| CN105369738B true CN105369738B (en) | 2017-01-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110160489A (en) * | 2018-02-10 | 2019-08-23 | 中铁十局集团第三建设有限公司 | A kind of Cast-in-situ Beam pre-pressing bracket Fibre Optical Sensor settlement automatic monitoring method |
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| CN107201827A (en) * | 2016-03-16 | 2017-09-26 | 中铁十五局集团有限公司 | Pre-pressing bracket construction method based on settlement observation |
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| CN106400689A (en) * | 2016-09-13 | 2017-02-15 | 陈凯 | Sealed water bag prepressing construction technology |
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| CN114427220A (en) * | 2022-03-04 | 2022-05-03 | 中电建十一局工程有限公司 | Porous arch bridge water bag prepressing construction method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008031768A (en) * | 2006-07-31 | 2008-02-14 | Ps Mitsubishi Construction Co Ltd | Cantilever overhanging erection method for corrugated steel plate web box girder bridge |
| KR101198911B1 (en) * | 2010-05-10 | 2012-11-08 | 정상희 | Construction technique of concrete box girder and this |
| CN202577163U (en) * | 2012-06-03 | 2012-12-05 | 中交第四公路工程局有限公司 | Temporary support for box girder erecting |
| CN202730636U (en) * | 2012-08-17 | 2013-02-13 | 中铁十六局集团有限公司 | Pouring device for concrete among reinforced concrete composite girder boxes |
| CN103437291B (en) * | 2013-08-02 | 2015-10-21 | 中交二公局第一工程有限公司 | Monolithic water tank precompressed construction technology |
| CN203475313U (en) * | 2013-08-02 | 2014-03-12 | 中交二公局第一工程有限公司 | Integral type precompression water tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160489A (en) * | 2018-02-10 | 2019-08-23 | 中铁十局集团第三建设有限公司 | A kind of Cast-in-situ Beam pre-pressing bracket Fibre Optical Sensor settlement automatic monitoring method |
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| CN105369738A (en) | 2016-03-02 |
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