CN108755453A - A kind of water punching is damaged the composite reinforcement structure and its reinforcement means of bridge pier - Google Patents
A kind of water punching is damaged the composite reinforcement structure and its reinforcement means of bridge pier Download PDFInfo
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- CN108755453A CN108755453A CN201810572611.1A CN201810572611A CN108755453A CN 108755453 A CN108755453 A CN 108755453A CN 201810572611 A CN201810572611 A CN 201810572611A CN 108755453 A CN108755453 A CN 108755453A
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- pier
- concrete
- pile foundation
- bridge
- foundation
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
Abstract
The composite reinforcement structure and its reinforcement means for being damaged bridge pier are rushed the invention discloses a kind of water, its ruggedized construction includes the supplement pile foundation for being set to existing pile foundation surrounding, be set to existing pile foundation and supplement pile foundation around piece stone concrete and the supplement cushion cap that is set to above piece stone concrete, reinforcement means include the following steps：(1) pile foundation, (4) foundation replacement are augmented in protection and preparation before construction, (2) excavation and reinforcement region, (3), and (5) increase basis, (6) backfill.The present invention is reinforced simultaneously to ground beneath using composite reinforcement structures and methods and pile foundation is reinforced, and had both improved the stability and bearing capacity of pile foundation, and had also increased the erosion resistibility of bridge pier.The present invention is suitable for the reinforcing that flood erosion causes bridge impaired.
Description
Technical field
The present invention relates to bridge strengthening fields, and in particular to a kind of water punching is damaged composite reinforcement structure and its reinforcing of bridge pier
The method that structural damage carries out integral reinforcing to it is caused on method, more particularly to a kind of Railway Bridges And Piers basis after flood erosion.
Background technology
Flood and its it is caused wash away be influence bridge security an important factor for, be more than half damaged or destroyed by flood bridge collapse with
Flood erosion is related.Flood erosion bridge foundation will cause Pile side soil body and embedded depth of foundation to reduce, pier shaft is damaged and bearing capacity
A series of problems, such as being reduced with stability, and then bridge overall stiffness and bearing capacity reduction and water flow impact pressure is caused to increase,
And then bridge power performance change is influenced, bridge collapse can be led under serious conditions, there is an urgent need for carrying out consolidation process to it, especially
For axis weight bigger, speed higher and the more heavy haul railways of freight volume, a series of pier footing disease meetings caused by washing away
Serious security threat is caused to the operation of train, reinforcing impaired bridge pier seems particularly important.
A designer person has carried out correlative study thus, and devises various Scheme of Strengthening, currently used reinforcing
Method mainly banket method, increase pile foundation method, prestressing and section-increased method etc., these methods are typically all in pier
Basic surrounding augments a certain number of pile foundations or increases key dimension, to achieve the purpose that reinforcing.Although these methods have
Certain consolidation effect, but mostly exist and only consider that bridge pier is reinforced or only considers strengthening of foundation situation, there is also reinforcement means to examine
Consider the problems such as not comprehensive, consolidation effect is undesirable.Such as a kind of 201520723360.4 bridge foundation ruggedized construction of patent, it provides
A kind of reinforcement means of supplement stake and cushion cap, but the pile foundation needs augmented drill on existing cushion cap, are easily destroyed and hold
The stability of platform, and since increased cushion cap is only on original cushion cap, consolidation effect is limited.For another example patent
A kind of 201720783252.5 bridge pier bracing means, although pier subsidence can be solved the problems, such as, shape packaging type construction work
Sequence is complicated, and does not account for reinforcing basic below pier base, or there are security risks, thus there is an urgent need to it is a kind of more
Scientific and reasonable reinforcement means.
Invention content
The present invention provides a kind of combination for solving water and rushing a kind of undesirable impaired bridge pier of water punching of the impaired consolidation effect of bridge pier
Ruggedized construction and its reinforcement means.
To achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of water punching is damaged the composite reinforcement structure of bridge pier, and key technology is：It includes being set to existing pile foundation surrounding
Supplement pile foundation, the piece stone concrete being set to around existing pile foundation and supplement pile foundation and the supplement being set to above piece stone concrete
Cushion cap.
As restriction, described stone concrete surrounding is provided with mask reinforcing bar.
It is limited as another kind, connection reinforcing bar is provided on the supplement cushion cap and existing cushion cap foundation joint face.
It is limited as another kind, connection reinforcing bar is provided on the supplement cushion cap and pier shaft joint face.
As further limiting, connection reinforcing bar is provided on the supplement cushion cap and piece stone concrete joint face.
A kind of its reinforcement means of the impaired composite reinforcement structure of bridge pier of water punching includes the following steps：
(1) protection and preparation before construction.
(2) it clears up and excavates water and rush bridge pier reinforcing area.
(3) supplement pile foundation reinforcement is carried out, is rushed in water and carries out supplement pile foundation construction around pier footing.
(4) foundation replacement reinforcing is carried out, for more than boulder bed carrying out foundation replacement or casting concrete adds when reinforcing
Gu.
(5) carry out increase strengthening of foundation, drilled in pier shaft and basic surrounding, borehole cleaning, bar planting and increase basis plus
Gu.
(6) it backfills around sandy gravel to basis, completes safeguard procedures.
As restriction, step of the present invention（1）In protection preparation mainly include bridge on speed limit, be laid with bridge under apply
Work sidewalk, mechanical equipment, which are marched into the arena, prepares construction, security protection, while necessary monitoring is arranged on pile foundation and girder and surveys
Point formulates detailed monitoring scheme, and the content predominantly detected includes pier top horizontal displacement and sedimentation, the horizontal displacement of cushion cap top and sinks
Drop, pier slope and reinforcing pier beam-ends bottom absolute altitude and bridge operation performance test Testing index carry out conventional prison before construction
Control, and using routine monitoring data as a reference value, construction carries out lasting monitoring according to level-one detection requirement after starting.
It is limited as another kind, the step（2）Excavation and reinforcement region is excavated soil layer around pile foundation and is cleared up first
Surrounding sundries handles existing cushion cap and pier shaft circumferential concrete surface deterioration concrete dabbing, to bulge, voids and pits and floats
Slurry etc. carries out polishing and dabbing processing, and polishing dabbing depth, which is subject to, exposes original structure stone, then uses giant and steel wire
Brush rinses cushion cap and reinforces the various sundries at pier shaft position, and is excavated to design position.
It is limited as another kind, the step（3）Augmenting pile foundation is specially：Drill-pouring is mended in existing pier footing surrounding
, 80,000 ms/h of train speed limit on bridge, cast-in-situ bored pile are used by root application engineering method, when previous during bored pile construction
After pile completes concreting, then next pile of constructing is whittled into hole using abrasion drill when construction, forbids using impact drill, steel
The construction of muscle cage is using segmental machining, the method for segmented welding.
It is limited as another kind, the step（4）Square boulder bed above section uses certainly foundation replacement needs under the foundation
Lower and upper sequence pours C30 and the above piece stone concrete or slightly expanded concrete, and mask reinforcing bar is arranged in surrounding.
It is limited as another kind, the step（5）Increasing basic specific method is：Drilling, bar planting, binding and pouring concrete
Construction, is bored around slabstone top of concrete, existing cushion cap foundation surrounding and top surface, pier shaft stabilization zone with impact drill first
Hole inner concrete powder is cleaned out after the completion of drilling using high-pressure pump, and is implanted into ring by hole, drilling depth 10-20cm
Connection reinforcing bar is inserted into drilling by oxygen resin anchoring adhesive, and the overlap joint welding between adjacent twin columns, position while welding need to be staggered, then again
After binding distributing bar and stirrup, all implantation reinforcing bars and distributing bar construction, shuttering and phase is carried out on the outside of basis
It should support, finally pour high grade slightly expanded concrete, the casting concrete is primary concreting, not stratified, pours completion
It conserves 3-7 days at normal temperatures, remains that concrete surface moistens in maintenance processes, after concrete reaches design strength, tear open
Except support and template.
It is limited as another kind, the step（6）It is slabstone or sandy soil material to backfill material therefor.
As further limiting, the bridge pier composite reinforcement method, supplement pile foundation quantity increases key dimension and basis
Packed height need to determine that economic optimum is original under the premise of reinforcing safety with satisfaction by Force Calculation analysis in bridge specification
Then.
The present invention is as a result of above-mentioned structure, and compared with prior art, acquired technological progress is：
（1）The present invention considers that ground beneath is reinforced and pile foundation reinforces two aspects relative to traditional reinforcement means, will
The old and new's close structure combines, and has both considered the stability and bearing capacity of pile foundation, it is also considered that the antiscour of bridge pier from now on
Ability reduces the maintenance workload and cost of later stage bridge pier.
（2）The present invention is damaged bridge pier problem using the processing water punching of composite reinforcement method, has not only strengthened ground beneath structure, but also
Foundation area size is increased, while also increasing cushion cap area, pile foundation stability and bearing capacity can be improved simultaneously,
Also the anti-seismic performance of bridge greatly improved.
To sum up, the present invention had not only improved the stability and bearing capacity of bridge pier, but also improved the erosion resistibility of power bridge pier, fitted
The reinforcing for being damaged bridge pier is rushed for water.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.
In the accompanying drawings：
Fig. 1 is the structural schematic diagram before bridge pier of the embodiment of the present invention is reinforced；
Fig. 2 is the structural schematic diagram that the embodiment of the present invention augments pile foundation；
Fig. 3 is that the embodiment of the present invention changes the structural schematic diagram for filling out basis；
Fig. 4 is the structural schematic diagram that the embodiment of the present invention increases basis and cushion cap.
Mark component：1- girders, 2- bent caps, 3- pier shafts, the existing cushion cap foundations of 4-, 5- existing pile foundations, 6- augment cushion cap, 7-
Piece stone concrete, 8- augment pile foundation.
Specific implementation mode
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.It should be appreciated that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
A kind of water punching of embodiment is damaged the composite reinforcement structure of bridge pier
With reference to Fig. 2-4, the present embodiment includes the supplement pile foundation 8 for being set to 5 surrounding of existing pile foundation, existing pile foundation 5 and supplement pile foundation
Slabstone concrete seven around 8, the supplement cushion cap 6 being set to above slabstone concrete seven.
The slabstone concrete seven surrounding is provided with mask reinforcing bar.
It is provided with connection reinforcing bar on 4 joint face of the supplement cushion cap 6 and existing cushion cap foundation.
It is provided with connection reinforcing bar on the supplement cushion cap 6 and 3 joint face of pier shaft.
It is provided with connection reinforcing bar on the supplement cushion cap 6 and slabstone concrete seven joint face.
A kind of its reinforcement means of the embodiment impaired composite reinforcement structure of bridge pier of water punching
Referring to Fig.1, the present embodiment is by taking common heavy haul railway shallow foundation pile foundation lighter pier as an example, and specific implementing measure is such as
Under.
(1) the preceding protection of construction and preparation are carried out first.Necessary protection and early-stage preparations are carried out before formal construction,
It mainly marches into the arena including builder's road, mechanical equipment under speed limit, laying bridge on bridge and prepares construction, security protection, while in pier base
Necessary monitoring stations are set on plinth and girder, formulate detailed monitoring scheme, including pier top horizontal displacement and sedimentation, cushion cap top
Horizontal displacement and sedimentation, pier slope and reinforcing pier beam-ends bottom absolute altitude and bridge operation performance test Testing index, are constructing
The conventional monitoring of preceding progress, and using routine monitoring data as a reference value, construction is continued after starting according to level-one detection requirement
Monitoring.
(2) it clears up and excavates water and rush bridge pier reinforcing area.Soil layer around pile foundation is excavated first and is cleared up miscellaneous around
Object handles existing cushion cap and pier shaft circumferential concrete surface deterioration concrete dabbing, to bulge, voids and pits and laitance etc. into
Row polishing and dabbing processing, polishing dabbing depth is subject to and exposes original structure stone, after above-mentioned work, with giant and
Wire brush rinses cushion cap and reinforces the various sundries at pier shaft position, then carries out being excavated to design position.
(3) supplement pile foundation reinforcement is carried out.Confirm drilled pile position according to the accurate unwrapping wire of construction drawing with reference to attached drawing 2, carries out
It mends and increases pile foundation construction, minimizing drilling construction influences bridge stability, train speed limit, existing bridge on bridge during pile foundation construction
Pier foundation surrounding mends cast-in-situ bored pile, and cast-in-situ bored pile is used by root application engineering method, after previous pile completes concreting, then
It constructs next pile, when construction should carve control concentration of hydraulic mixture, prevent collapse hole, forbid to construct using impact drill, steel reinforcement cage construction is adopted
With segmental machining, the method for segmented welding.
(4) foundation replacement reinforcing is carried out.With reference to attached drawing 3, after pile foundation construction is completed and concrete reaches design strength,
Proceed by strengthening of foundation.For strengthening of foundation more than boulder bed is carried out, the above earthwork of pile foundation surrounding boulder bed is excavated, from lower
Upper sequence pours C30 piece stone concretes, and in basic surrounding setting mask reinforcing bar, completes to increase basis and change to dose admittedly.
(5) increase strengthening of foundation is carried out.With reference to attached drawing 4, drilled in bridge pier stabilization zone and basic surrounding and top surface,
Bar planting, binding and pouring concrete construction are reinforced in slabstone top of concrete, existing cushion cap foundation surrounding and top surface, pier shaft first
It is drilled with impact drill around area, drilling depth 10-20cm uses high-pressure pump by hole inner concrete powder after the completion of drilling
End is cleaned out, and is implanted into epoxy resin anchoring adhesive, connection reinforcing bar is inserted into drilling, the overlap joint welding between adjacent twin columns, weldering
Seam position need to be staggered, and distributing bar and stirrup then be bound again, after all implantation reinforcing bars and distributing bar are constructed, on basis
Outside shuttering simultaneously carries out respective support, finally pours high grade slightly expanded concrete, and the casting concrete is disposably to pour
It builds, it is not stratified, it pours completion and conserves 3-7 days at normal temperatures, remain that concrete surface moistens in maintenance processes, wait for concrete
After reaching design strength, support and template are removed, and carry out beautiful processing.
(6) it backfills around sandy gravel to basis, completes safeguard procedures.Pile foundation reinforce after the completion of to around basis into
Row backfill is handled, and backfilling material can be used the materials such as slabstone or sandy soil, can draw materials nearby, but must not generate shadow to closing on river
It rings.
Water punching using the present invention is damaged bridge pier composite reinforcement method, can not only greatly improve pile foundation bearing capacity
And stability, but also anti-flood capacity and erosion resistibility can be dramatically increased, pile foundation rigidity and durability greatly improve,
Reduce late maintaining maintenance load.In addition, after the impaired bridge pier of water punching uses composite reinforcement, pier shaft area of section and cushion cap ruler
The anti-seismic performance of bridge also greatly improved in very little increase.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although
Present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, still can be right
Technical solution recorded in foregoing embodiments is modified or equivalent replacement of some of the technical features.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in right of the present invention and want
Within the scope of asking protection.
Claims (9)
1. a kind of water punching is damaged the composite reinforcement structure of bridge pier, it is characterised in that：It includes being set to existing pile foundation（5）Surrounding
Augment pile foundation（8）, be set to existing pile foundation（5）With supplement pile foundation（8）The piece stone concrete of surrounding（7）Be set to slabstone coagulation
Soil（7）Supplement cushion cap above（6）；
Described stone concrete（7）Surrounding is provided with mask reinforcing bar；
The supplement cushion cap（6）With existing cushion cap foundation（4）Connection reinforcing bar is provided on joint face；
The supplement cushion cap（6）And pier shaft（3）Connection reinforcing bar is provided on joint face；
The supplement cushion cap（6）With piece stone concrete（7）Connection reinforcing bar is provided on joint face.
2. claim 1 a kind of water punching be damaged bridge pier composite reinforcement structure reinforcement means comprising following steps：
(1) protection and preparation before construction；
(2) excavation and reinforcement region：It clears up and excavates water and rush bridge pier reinforcing area；
(3) pile foundation is augmented：It is rushed in water and carries out supplement pile foundation construction around pier footing；
(4) foundation replacement：To more than boulder bed around bridge pier carrying out foundation replacement or casting concrete；
(5) increase basis：Drilled in pier shaft and basic surrounding, borehole cleaning, bar planting and casting concrete；
(6) it backfills：It backfills around sandy gravel to basis, completes safeguard procedures.
3. a kind of its reinforcement means of the impaired composite reinforcement structure of bridge pier of water punching according to claim 2, it is characterised in that：
The step（1）In protection preparation include speed limit on bridge, be laid with builder's road and mechanical equipment under bridge and march into the arena preparation and apply
Work security protection, while necessary monitoring stations are set on pile foundation and girder, monitoring scheme is formulated, monitoring content includes
Pier top horizontal displacement and sedimentation, cushion cap top horizontal displacement and sedimentation, pier slope and reinforcing pier beam-ends bottom absolute altitude and bridge fortune
Performance test Testing index is sought, conventional monitoring is carried out before construction, and using routine monitoring data as a reference value, after construction starts
Lasting monitoring is carried out according to level-one detection requirement.
4. a kind of its reinforcement means of the impaired composite reinforcement structure of bridge pier of water punching according to claim 1, it is characterised in that：
The step（2）Excavation and reinforcement region is specially：Soil layer around pile foundation is excavated first and clears up surrounding sundries, is held existing
Platform and the processing of pier shaft circumferential concrete surface deterioration concrete dabbing, polishing and dabbing are carried out to bulge, voids and pits and laitance
Processing, polishing dabbing depth, which is subject to, exposes original structure stone, then uses giant and wire brush to rinse cushion cap and reinforces pier
The various sundries at body position, and it is excavated to design position.
5. a kind of its reinforcement means of the impaired composite reinforcement structure of bridge pier of water punching according to claim 1, it is characterised in that：
The step（3）Augmenting pile foundation is specially：The bridge during existing pier footing surrounding benefit cast-in-situ bored pile, bored pile construction
80,000 ms/h of upper train speed limit, cast-in-situ bored pile is used by root application engineering method, after previous pile completes concreting, then
Construct next pile, hole be whittled into using abrasion drill when construction, forbid to use impact drill, steel reinforcement cage construction using segmental machining, point
The method of section welding.
6. a kind of its reinforcement means of the impaired composite reinforcement structure of bridge pier of water punching according to claim 1, it is characterised in that：
The step（4）Foundation replacement is specially：Need under the foundation square boulder bed above section C30 is poured using sequence from low to uper part
And the above piece stone concrete or slightly expanded concrete, and mask reinforcing bar is set in surrounding.
7. a kind of its reinforcement means of the impaired composite reinforcement structure of bridge pier of water punching according to claim 1, it is characterised in that：
The step（5）Increasing basic specific method is：Drilling, bar planting, binding and pouring concrete construction, first on piece stone concrete top
It is drilled with impact drill around face, existing cushion cap foundation surrounding and top surface, pier shaft stabilization zone, drilling depth 10-20cm is bored
Hole inner concrete powder is cleaned out using high-pressure pump after the completion of hole, and is implanted into epoxy resin anchoring adhesive, reinforcing bar will be connected
It is inserted into drilling, the overlap joint welding between adjacent twin columns, position while welding need to be staggered, and then bind distributing bar and stirrup again, own
It is implanted into after reinforcing bar and distributing bar construct, shuttering and carries out respective support on the outside of basis, it is micro- finally to pour high grade
Expansive concrete, the casting concrete is primary concreting, not stratified, pours completion and conserves 3-7 days at normal temperatures, conserved
It remains that concrete surface moistens in journey, after concrete reaches design strength, removes support and template.
8. a kind of its reinforcement means of the impaired composite reinforcement structure of bridge pier of water punching according to claim 1, it is characterised in that：
The step（6）Middle backfill material therefor is slabstone or sandy soil material.
9. a kind of its reinforcement means of the impaired composite reinforcement structure of bridge pier of water punching according to claim 1, it is characterised in that：
The bridge pier composite reinforcement method, supplement pile foundation quantity, increase key dimension and basic packed height need to pass through bridge specification
Middle Force Calculation analysis determines that economic optimum is principle under the premise of reinforcing safety using satisfaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810572611.1A CN108755453B (en) | 2018-06-06 | 2018-06-06 | Combined reinforcing structure of water-washed damaged pier and reinforcing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810572611.1A CN108755453B (en) | 2018-06-06 | 2018-06-06 | Combined reinforcing structure of water-washed damaged pier and reinforcing method thereof |
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| CN108755453A true CN108755453A (en) | 2018-11-06 |
| CN108755453B CN108755453B (en) | 2020-06-30 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110804957A (en) * | 2019-09-29 | 2020-02-18 | 安徽省交通控股集团有限公司 | Protection method for local scouring of bridge pier |
| CN110820819A (en) * | 2019-10-31 | 2020-02-21 | 山西省交通建设工程质量检测中心（有限公司） | Method for adding pile on existing bridge pile foundation |
| CN112921962A (en) * | 2021-01-25 | 2021-06-08 | 浙江鼎固建筑技术有限公司 | Pile foundation reinforcing method |
| CN113622324A (en) * | 2021-09-23 | 2021-11-09 | 中建八局南方建设有限公司 | Reinforcing structure of bridge abutment and construction method thereof |
| CN114016393A (en) * | 2021-08-26 | 2022-02-08 | 中国科学院西北生态环境资源研究院 | Pier retention system |
| CN114737626A (en) * | 2022-04-15 | 2022-07-12 | 中铁十六局集团路桥工程有限公司 | Foundation reinforcement construction method during bridge operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110804957A (en) * | 2019-09-29 | 2020-02-18 | 安徽省交通控股集团有限公司 | Protection method for local scouring of bridge pier |
| CN110820819A (en) * | 2019-10-31 | 2020-02-21 | 山西省交通建设工程质量检测中心（有限公司） | Method for adding pile on existing bridge pile foundation |
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| CN113622324A (en) * | 2021-09-23 | 2021-11-09 | 中建八局南方建设有限公司 | Reinforcing structure of bridge abutment and construction method thereof |
| CN114737626A (en) * | 2022-04-15 | 2022-07-12 | 中铁十六局集团路桥工程有限公司 | Foundation reinforcement construction method during bridge operation |
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| Publication number | Publication date |
|---|---|
| CN108755453B (en) | 2020-06-30 |
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