CN106759458A - The U-shape structure of bridge pile foundation underpins transfer system and its applies method - Google Patents
The U-shape structure of bridge pile foundation underpins transfer system and its applies method Download PDFInfo
- Publication number
- CN106759458A CN106759458A CN201710077009.6A CN201710077009A CN106759458A CN 106759458 A CN106759458 A CN 106759458A CN 201710077009 A CN201710077009 A CN 201710077009A CN 106759458 A CN106759458 A CN 106759458A
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- Prior art keywords
- bridge
- pile foundation
- existing
- existing bridge
- shape structure
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/48—Foundations inserted underneath existing buildings or constructions
Abstract
Transfer system being underpined the invention discloses a kind of U-shape structure of bridge pile foundation and its applying method, shifting risk property of stress system is big when solving the problems, such as to be transferred to the stress system of former bridge pile foundation in newly-built pile foundation system.In high-pressure rotary jet grouting pile（6）Top applied graded broken stone mattress layer（15）, in the bridge pile foundation support table of existing bridge（3）Medial surface on applied cushion cap bar planting（9）, in the bridge pier base abutment of existing bridge（4）Medial surface on applied abutment bar planting（10）, in the bridge pile foundation support table of existing bridge（3）Inner side, the bridge pier base abutment of existing bridge（4）Inner side and plain concrete cushion layer（7）Between applied cast-in-place U-shape structure raft plate（8）, in cast-in-place U-shape structure raft plate（8）Top surface and existing bridge bridge plate（5）Bottom surface between be formed with 4 centimetres of gap（11）.Present invention saves a cost is changed, the uncertainty and risk for changing the transfer of bridge load stress point during stake and causing is evaded.
Description
Technical field
The present invention relates to a kind of transfer system that underpins of bridge pile foundation, the transfer that underpins of more particularly to a kind of bridge pile foundation is
Unite and its apply method.
Background technology
Bridge pile foundation is the base unit for carrying bridge load, and the load of bridge passes to pile foundation by abutment body, cushion cap.
, it is necessary to carry out protection treatment to existing bridge pile foundation during the new construction of structures in existing bridge pile foundation region, to realize new construction of structures
Structure.Prior art has two kinds, and one kind is first to remove existing bridge, and pulls out pile foundation, then carries out the construction of new structures,
Rebuilt bridges again.In the presence of investing big, long in time limit and influenceing big defect to surrounding enviroment, particularly in down town, traffic is numerous
Busy, pipeline gathers, proximate building, it is impossible to the construction method rebuilded using dismounting to bridge.Another construction method is：Using
Actively change the mode of stake, will the stress system of former bridge pile foundation be transferred in newly-built pile foundation system, in this way, bridge
The transfer of stress system is disposable completion, easily in stress transfer process, is destroyed former bridge superstructure, is made
Inclined into the body of a bridge, bridge floor cracking, cause to have bridge can not normally use.In Urban Metro Construction, shield can be run into interval
The small part pile foundation of existing bridge pile foundation is only passed through, during shield, it is only necessary to the small part being arranged on shield interval
There is bridge pile foundation to be cut off, a mode is changed according to above-mentioned active, the existing bridge pile foundation not on shield interval can be made
Effect can not play again, cause the waste of existing resource, in addition, pile driving construction is changed in disposable stress system transfer, exist not
The big defect of certainty risk, it is difficult to ensure that the uninterrupted current of existing bridge is used.
The content of the invention
Transfer system is underpined the invention provides a kind of U-shape structure of bridge pile foundation and its apply method, solve original
The stress system of bridge pile foundation is transferred to disposable shifting risk property of stress system big technical problem when in newly-built pile foundation system.
The present invention is to solve above technical problem by the following technical programs：
A kind of U-shape structure of bridge pile foundation underpins transfer system, the cofferdam that existing bridge both sides apply is included in, in existing bridge
Existing pile foundation periphery and cofferdam in applied high-pressure rotary jet grouting pile on riverbed, the existing pile foundation of existing bridge is existing by what is retained
The existing bridge pile foundation composition of bridge pile foundation and pre-cut, the existing bridge pile foundation of pre-cut is provided on shield interval
, graded broken stone mattress layer has been applied at the top of high-pressure rotary jet grouting pile, plain concrete pad is provided with graded broken stone mattress layer
Layer, has applied cushion cap bar planting, in the bridge pier base abutment of existing bridge on the medial surface of the bridge pile foundation support table of existing bridge
Abutment bar planting is applied on side, in the inner side of the bridge pile foundation support table of existing bridge, the inner side of the bridge pier base abutment of existing bridge
And applied cast-in-place U-shape structure raft plate between plain concrete cushion layer, in the bridge of top surface and the existing bridge of cast-in-place U-shape structure raft plate
4 centimetres of gap is formed between the bottom surface of plate.
The seam of 4 centimetres formed between the bottom surface of the bridge plate of the top surface and existing bridge of cast-in-place U-shape structure raft plate
The cushion of 2 cm thicks is provided with gap.
A kind of U-shape structure of bridge pile foundation underpins transfer system and applies method
The first step, in existing bridge both sides construction cofferdam, pump drainage cofferdam internal water accumulation on the existing pile foundation periphery of existing bridge and encloses
High-pressure rotary jet grouting pile is applied in weir on riverbed, graded broken stone mattress layer, form compound foundation are applied at the top of high-pressure rotary jet grouting pile；
Second step, on the medial surface of the bridge pile foundation support table of existing bridge, apply cushion cap bar planting, meanwhile, in the bridge of existing bridge
On the medial surface of pile foundation abutment, abutment bar planting is applied；
3rd step, the first step complete composite foundation on, apply plain concrete cushion layer, applied in plain concrete cushion layer cast-in-place
U-shape structure raft plate, makes the gap of 4 centimetres of formation between the bottom surface of the top surface of cast-in-place U-shape structure raft plate and the bridge plate of existing bridge,
And make together with cast-in-place U-shape structure raft plate both sides side wall is brought into close contact with the abutment medial surface of existing bridge, the bridge of existing bridge
The stress of pile framing, is delivered on cast-in-place U-shape structure raft plate by cushion cap bar planting and abutment bar planting；
4th step, the cushion for being encased inside in gap 2 cm thicks；
5th step, startup are arranged on the shield machine on front side of the existing bridge pile foundation of the pre-cut on shield interval, in riverbed
Shield uplink and downlink carry out shield-tunneling construction, the existing bridge pile foundation of the pre-cut on shield excision shield interval；
After 6th step, existing bridge pile foundation are removed, existing bridge can occur slow sedimentation, slowly with gap in be encased inside 2 lis
The thick cushion of rice fits together, and cast-in-place U-shape structure raft plate is carried existing bridge jointly with the existing bridge pile foundation for retaining
Weight.
The present invention is greatlyd save and changes a cost, and evaded change during stake due to bridge load stress point transfer and
The uncertainty and risk for causing.Construction cost is low, and can guarantee that existing bridge is safe in work progress, unimpeded.
Brief description of the drawings
Fig. 1 is structural representation of the present invention on main view direction；
Fig. 2 is structural representation of the present invention in side-looking direction；
Fig. 3 be existing bridge of the invention existing pile foundation and cofferdam in the structural representation of high-pressure rotary jet grouting pile 6 is applied on riverbed.
Specific embodiment
The present invention is described in detail below in conjunction with the accompanying drawings：
A kind of U-shape structure of bridge pile foundation underpins transfer system, the cofferdam that existing bridge both sides apply is included in, in existing bridge
Existing pile foundation periphery and cofferdam in applied high-pressure rotary jet grouting pile 6 on riverbed, the existing pile foundation of existing bridge is by retaining both
It is made up of the existing bridge pile foundation 12 of bridge pile foundation 2 and pre-cut, the existing bridge pile foundation 12 of pre-cut is provided in shield
On interval, graded broken stone mattress layer 15 is applied at the top of high-pressure rotary jet grouting pile 6, be provided with graded broken stone mattress layer 15
Plain concrete cushion layer 7, has applied cushion cap bar planting 9, in the bridge of existing bridge on the medial surface of the bridge pile foundation support table 3 of existing bridge
Abutment bar planting 10 is applied on the medial surface of pile foundation abutment 4, in the inner side of the bridge pile foundation support table 3 of existing bridge, existing bridge
Cast-in-place U-shape structure raft plate 8 is applied between the inner side of bridge pier base abutment 4 and plain concrete cushion layer 7, in cast-in-place U-shape structure raft plate 8
Top surface and existing bridge bridge plate 5 bottom surface between be formed with 4 centimetres of gap 11.
4 centimetres formed between the bottom surface of the bridge plate 5 of the top surface and existing bridge of cast-in-place U-shape structure raft plate 8
The cushion of 2 cm thicks is provided with gap 11.
A kind of U-shape structure of bridge pile foundation underpins transfer system and applies method
The first step, in existing bridge both sides construction cofferdam, pump drainage cofferdam internal water accumulation on the existing pile foundation periphery of existing bridge and encloses
High-pressure rotary jet grouting pile 6 is applied in weir on riverbed, graded broken stone mattress layer 15 is applied at the top of high-pressure rotary jet grouting pile 6, form stabilization
Composite foundation；
Second step, on the medial surface of the bridge pile foundation support table 3 of existing bridge, apply cushion cap bar planting 9, meanwhile, in existing bridge
On the medial surface of bridge pier base abutment 4, abutment bar planting 10 is applied；
3rd step, on the composite foundation that the first step is completed, apply plain concrete cushion layer 7, applied in plain concrete cushion layer 7 existing
U-shape structure raft plate 8 is poured, makes to form 4 centimetres between the bottom surface of the top surface of cast-in-place U-shape structure raft plate 8 and the bridge plate 5 of existing bridge
Gap 11, and make together with the cast-in-place both sides side wall of U-shape structure raft plate 8 is brought into close contact with the abutment medial surface of existing bridge, it is existing
The stress of the bridge pier cushion cap 3 of bridge, is delivered on cast-in-place U-shape structure raft plate 8 by cushion cap bar planting 9 and abutment bar planting 10；
4th step, the cushion for being encased inside in gap 11 2 cm thicks, are buffered when the bridge plate 5 of existing bridge is sunk；
5th step, startup are arranged on the shield machine 16 of the front side of existing bridge pile foundation 12 of the pre-cut on shield interval, to riverbed 1
In shield uplink 13 and downlink 14 carry out shield-tunneling construction, the existing Bridge Pile of the pre-cut on shield excision shield interval
Base 12；Because the existing bridge pile foundation 12 of pre-cut has passed through 10 turns of cushion cap bar planting 9 and abutment bar planting to the load of existing bridge
Move on on cast-in-place U-shape structure raft plate 8, and carried by the soil body after being improved by high-pressure rotary jet grouting pile 6 under cast-in-place U-shape structure raft plate 8,
Existing bridge pile foundation 12 is formd to the load of existing bridge by cast-in-place U-shape structure raft plate 8 and the existing bridge pile foundation of pre-cut
12 common carryings；
After 6th step, existing bridge pile foundation 12 are removed, because the existing bridge pile foundation 12 of pre-cut is to the load of existing bridge
It is transferred on cast-in-place U-shape structure raft plate 8 by cushion cap bar planting 9 and abutment bar planting 10 completely, existing bridge can occur slow sedimentation,
This process is that lentamente substep is shifted, the bridge plate 5 of existing bridge slowly with the cushion of 2 cm thicks that is encased inside in gap 11
Fit together, so as to avoid the disposable and swiftness of the existing stress transfer changed existing for piling method, it is to avoid change stake
In the phenomenon such as the cracking of existing bridge floor that often occurs generation；Realize cast-in-place U-shape structure raft plate 8 and retain both
There is bridge pile foundation 2 to carry the weight of existing bridge jointly, realize during existing bridge pile foundation 12 is entirely cut off, protect as far as possible
Hold not changing for existing bridge force-bearing point, it is ensured that the stability under loading of existing bridge.
The part of existing bridge is carried and passes through cushion cap respectively by this method on the premise of existing bridge hard point is not changed
Bar planting 9, abutment bar planting 10 and cushion substep are transferred on cast-in-place U-shape structure raft plate 8, and by under cast-in-place U-shape structure raft plate 8
The soil body after being improved by high-pressure rotary jet grouting pile 6 is carried.In shield tunneling process, it is only necessary to cut off the part pile foundation of existing bridge,
And the bridge pier is located at downtown area, superstructure and landscape planting are more perfect, and surrounding enviroment are complicated, the traffic of existing bridge
Throughput is big, and closure construction can cause heavy economic losses and have a strong impact on civil plantation, can use construction method of the invention.
The present invention also explores one in the case of former bridge pile foundation partial destruction, without removing bridge, carries out bridge
A kind of new construction method reinforced, has given full play to the bearing function for not destroying former bridge pier, greatlys save construction investment and makes
Valency, shortens construction period, routine has been evaded well and has changed the uncertain risk that stake is brought, with extensive popularization and application
Value and social benefit.
Claims (3)
1. a kind of U-shape structure of bridge pile foundation underpins transfer system, the cofferdam that existing bridge both sides apply is included in, in existing bridge
In the existing pile foundation periphery of beam and cofferdam high-pressure rotary jet grouting pile has been applied on riverbed（6）, the existing pile foundation of existing bridge is by retaining
Existing bridge pile foundation（2）With the existing bridge pile foundation of pre-cut（12）Composition, the existing bridge pile foundation of pre-cut（12）It is
It is arranged on shield interval, in high-pressure rotary jet grouting pile（6）Top applied graded broken stone mattress layer（15）, in graded broken stone cotton-padded mattress
Bed course（15）On be provided with plain concrete cushion layer（7）, it is characterised in that in the bridge pile foundation support table of existing bridge（3）Medial surface
On applied cushion cap bar planting（9）, in the bridge pier base abutment of existing bridge（4）Medial surface on applied abutment bar planting（10）,
The bridge pile foundation support table of existing bridge（3）Inner side, the bridge pier base abutment of existing bridge（4）Inner side and plain concrete cushion layer（7）
Between applied cast-in-place U-shape structure raft plate（8）, in cast-in-place U-shape structure raft plate（8）Top surface and existing bridge bridge plate（5）'s
4 centimetres of gap is formed between bottom surface（11）.
2. a kind of U-shape structure of bridge pile foundation according to claim 1 underpins transfer system, it is characterised in that in cast-in-place U
Type structure raft plate（8）Top surface and existing bridge bridge plate（5）Bottom surface between formed 4 centimetres of gap（11）In set
It is equipped with the cushion of 2 cm thicks.
3. a kind of U-shape structure of bridge pile foundation underpins transfer system and applies method
The first step, in existing bridge both sides construction cofferdam, pump drainage cofferdam internal water accumulation on the existing pile foundation periphery of existing bridge and encloses
High-pressure rotary jet grouting pile is applied in weir on riverbed（6）, in high-pressure rotary jet grouting pile（6）Top apply graded broken stone mattress layer（15）, formed
Composite foundation；
Second step, the bridge pile foundation support table in existing bridge（3）Medial surface on, apply cushion cap bar planting（9）, meanwhile, in existing bridge
The bridge pier base abutment of beam（4）Medial surface on, apply abutment bar planting（10）；
3rd step, the first step complete composite foundation on, apply plain concrete cushion layer（7）, in plain concrete cushion layer（7）On apply
Make cast-in-place U-shape structure raft plate（8）, make cast-in-place U-shape structure raft plate（8）Top surface and existing bridge bridge plate（5）Bottom surface between
Form 4 centimetres of gap（11）, and make cast-in-place U-shape structure raft plate（8）Both sides side wall is tight with the abutment medial surface of existing bridge
Fit together, the bridge pier cushion cap of existing bridge（3）Stress, by cushion cap bar planting（9）With abutment bar planting（10）It is delivered to existing
Pour U-shape structure raft plate（8）On；
4th step, in gap（11）In be encased inside the cushion of 2 cm thicks；
5th step, startup are arranged on the existing bridge pile foundation of the pre-cut on shield interval（12）The shield machine of front side（16）, it is right
Riverbed（1）In shield uplink（13）And downlink（14）Carry out shield-tunneling construction, the pre-cut on shield excision shield interval
Existing bridge pile foundation（12）；
6th step, existing bridge pile foundation（12）After being removed, existing bridge can occur slow sedimentation, slowly with gap（11）Middle pad
The cushion of 2 cm thicks for entering fits together, and makes cast-in-place U-shape structure raft plate（8）With the existing bridge pile foundation for retaining（2）Jointly
Carry the weight of existing bridge.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710077009.6A CN106759458A (en) | 2017-02-13 | 2017-02-13 | The U-shape structure of bridge pile foundation underpins transfer system and its applies method |
| PCT/CN2018/075425 WO2018145623A1 (en) | 2017-02-13 | 2018-02-06 | U-shaped structural underpinning transfer system for bridge pile foundation and construction method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710077009.6A CN106759458A (en) | 2017-02-13 | 2017-02-13 | The U-shape structure of bridge pile foundation underpins transfer system and its applies method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106759458A true CN106759458A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710077009.6A Pending CN106759458A (en) | 2017-02-13 | 2017-02-13 | The U-shape structure of bridge pile foundation underpins transfer system and its applies method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106759458A (en) |
| WO (1) | WO2018145623A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018145623A1 (en) * | 2017-02-13 | 2018-08-16 | 中铁十九局集团有限公司 | U-shaped structural underpinning transfer system for bridge pile foundation and construction method therefor |
| CN109706909A (en) * | 2019-02-21 | 2019-05-03 | 郑州市市政工程总公司 | The structures foundation reinforcing structure and its construction method worn under reply metro shield |
| CN111926854A (en) * | 2020-07-21 | 2020-11-13 | 广州地铁设计研究院股份有限公司 | Pile foundation reinforcing method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439025A (en) * | 2019-08-30 | 2019-11-12 | 江苏省地质矿产局第三地质大队 | Portal type building pile foundation underpinning structure in narrow space and construction method |
| CN110905014A (en) * | 2019-12-10 | 2020-03-24 | 中建八局第二建设有限公司 | Construction structure and construction method for underpinning pile foundation |
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- 2017-02-13 CN CN201710077009.6A patent/CN106759458A/en active Pending
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2018
- 2018-02-06 WO PCT/CN2018/075425 patent/WO2018145623A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2018145623A1 (en) | 2018-08-16 |
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Inventor after: Ming Yong Si Inventor after: Gao Chong Inventor after: Luo Junguo Inventor after: Wang Yongwen Inventor after: Li Qiang Inventor after: Li Shida Inventor after: Wang Jianghua Inventor before: Ming Yong Si Inventor before: Luo Junguo Inventor before: Wang Yongwen Inventor before: Li Qiang Inventor before: Li Shida Inventor before: Wang Jianghua |
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Application publication date: 20170531 |