CN206570839U - The U-shape structure of bridge pile foundation underpins transfer system - Google Patents
The U-shape structure of bridge pile foundation underpins transfer system Download PDFInfo
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- CN206570839U CN206570839U CN201720128725.8U CN201720128725U CN206570839U CN 206570839 U CN206570839 U CN 206570839U CN 201720128725 U CN201720128725 U CN 201720128725U CN 206570839 U CN206570839 U CN 206570839U
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- existing bridge
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Abstract
Transfer system is underpined the utility model discloses a kind of U-shape structure of bridge pile foundation, the problem of shifting risk property of stress system is big when the stress system of former bridge pile foundation is transferred in newly-built pile foundation system is solved.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）.The utility model, which has been saved, changes a cost, has evaded and has changed uncertainty and risk caused by the transfer of bridge load stress point during stake.
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 protection processing be carried out to existing bridge pile foundation, to realize new construction of structures during the new construction of structures in existing bridge pile foundation region
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 surrounding enviroment being influenceed with big defect, particularly in down town, traffic is numerous
Busy, pipeline gathers, proximate building, it is impossible to the construction method rebuilded to bridge using dismounting.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 disposably completed, easily in stress transfer process, is destroyed former bridge superstructure, made
Tilted into the body of a bridge, bridge floor ftractures, and causes have bridge normally to 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 uninterrupted pass through of existing bridge uses.
The content of the invention
Underpin transfer system the invention provides a kind of U-shape structure of bridge pile foundation, solve by former bridge pile foundation by
Power system 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, is included in the cofferdam that existing bridge both sides are applied, existing
High-pressure rotary jet grouting pile is applied in the existing pile foundation periphery of bridge and cofferdam on riverbed, the existing pile foundation of existing bridge is by retaining
What existing bridge pile foundation and the existing bridge pile foundation of pre-cut were constituted, the existing bridge pile foundation of pre-cut is provided in shield interval
On, graded broken stone mattress layer has been applied at the top of high-pressure rotary jet grouting pile, plain concrete is provided with graded broken stone mattress layer
Bed course, cushion cap bar planting has been applied on the medial surface of the bridge pile foundation support table of existing bridge, in the bridge pier base abutment of existing bridge
Abutment bar planting is applied on medial surface, in the inner side of the bridge pile foundation support table of existing bridge, the bridge pier base abutment of existing bridge
Cast-in-place U-shape structure raft plate is applied between side and plain concrete cushion layer, in 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 bridge plate.
Cast-in-place U-shape structure raft plate top surface and existing bridge bridge plate bottom surface between 4 centimetres of seam being formed
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 high-pressure rotary jet grouting pile is applied in cofferdam on riverbed, graded broken stone mattress layer is applied at the top of high-pressure rotary jet grouting pile, compound ground is formed
Base；
Second step, on the medial surface of the bridge pile foundation support table of existing bridge, apply cushion cap bar planting, meanwhile, in existing bridge
Bridge pier base abutment medial surface on, apply abutment bar planting；
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 to form 4 centimetres between the bottom surface of the top surface of cast-in-place U-shape structure raft plate and the bridge plate of existing bridge
Gap, 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, existing bridge
Bridge pier cushion cap stress, be delivered to by cushion cap bar planting and abutment bar planting on cast-in-place U-shape structure raft plate；
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, to riverbed
In shield uplink and downlink carry out shield-tunneling construction, shield excision shield interval on pre-cut existing bridge pile foundation；
After 6th step, existing bridge pile foundation are removed, slow sedimentation can occur for existing bridge, slowly with being encased inside in gap
The cushion of 2 cm thicks fits together, and existing bridge pile foundation of the cast-in-place U-shape structure raft plate with retaining is carried existing bridge jointly
The weight of beam.
The present invention, which is greatlyd save, changes a cost, and evaded change during stake due to bridge load stress point transfer and
Caused uncertainty and risk.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 the existing bridge of the present invention existing pile foundation and cofferdam in the structure of high-pressure rotary jet grouting pile 6 applied on riverbed show
It is intended to.
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, is included in the cofferdam that existing bridge both sides are applied, existing
High-pressure rotary jet grouting pile 6 is applied in the existing pile foundation periphery of bridge and cofferdam on riverbed, the existing pile foundation of existing bridge is by retaining
Existing bridge pile foundation 2 and pre-cut existing bridge pile foundation 12 constitute, the existing bridge pile foundation 12 of pre-cut is provided in
On shield interval, graded broken stone mattress layer 15 is applied at the top of high-pressure rotary jet grouting pile 6, has been set on graded broken stone mattress layer 15
Plain concrete cushion layer 7 is equipped with, cushion cap bar planting 9 has been applied on the medial surface of the bridge pile foundation support table 3 of existing bridge, in existing bridge
Bridge pier base abutment 4 medial surface on applied abutment bar planting 10, 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 the bridge pier base abutment 4 of beam and plain concrete cushion layer 7, in cast-in-place U-shape structure
4 centimetres of gap 11 is formed between the bottom surface of the bridge plate 5 of the top surface of raft plate 8 and existing bridge.
Cast-in-place U-shape structure raft plate 8 top surface and existing bridge bridge plate 5 bottom surface between formed 4 centimetres
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 high-pressure rotary jet grouting pile 6 is applied in cofferdam on riverbed, graded broken stone mattress layer 15 is applied at the top of high-pressure rotary jet grouting pile 6, forms steady
Fixed 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 the bridge pier base abutment 4 of beam, abutment bar planting 10 is applied；
3rd step, the first step complete composite foundation on, apply plain concrete cushion layer 7, applied in plain concrete cushion layer 7
Make cast-in-place U-shape structure raft plate 8, make to form 4 lis 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
The gap 11 of rice, 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,
The stress of the bridge pier cushion cap 3 of existing 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, right
Shield uplink 13 and downlink 14 in riverbed 1 carry out the existing of the pre-cut on shield-tunneling construction, shield excision shield interval
Bridge pile foundation 12；Because the existing bridge pile foundation 12 of pre-cut is planted by cushion cap bar planting 9 and abutment to the load of existing bridge
Muscle 10 is transferred on cast-in-place U-shape structure raft plate 8, and the soil after being improved by high-pressure rotary jet grouting pile 6 under cast-in-place U-shape structure raft plate 8
Body is carried, and forms existing bridge pile foundation 12 to the load of existing bridge by cast-in-place U-shape structure raft plate 8 and the existing bridge of pre-cut
Beam pile foundation 12 is carried jointly；
After 6th step, existing bridge pile foundation 12 are removed, because the existing bridge pile foundation 12 of pre-cut is to existing bridge
Load is transferred on cast-in-place U-shape structure raft plate 8 by cushion cap bar planting 9 and abutment bar planting 10 completely, and existing bridge can occur slowly
Sedimentation, this process is that slowly substep is shifted, the bridge plate 5 of existing bridge slowly with 2 cm thicks that are encased inside in gap 11
Cushion fits together, so as to avoid the disposable and swiftness of the existing stress transfer changed present in piling method, it is to avoid
Change the generation of the phenomenons such as the cracking of existing bridge floor that often occurs in stake；Realize cast-in-place U-shape structure raft plate 8 and guarantor
The existing bridge pile foundation 2 stayed carries the weight of existing bridge jointly, realizes during existing bridge pile foundation 12 is entirely cut off,
Not changing for existing bridge force-bearing point is kept as far as possible, it is ensured that the stability under loading of existing bridge.
The part carrying of existing bridge is passed through cushion cap by this method respectively 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 under cast-in-place U-shape structure raft plate 8
Soil body carrying after being improved by high-pressure rotary jet grouting pile 6.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 be using 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, has greatlyd save construction investment and make
Valency, shortens construction period, and 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 (2)
1. a kind of U-shape structure of bridge pile foundation underpins transfer system, it is included in the cofferdam that existing bridge both sides are applied, 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 4 centimetres of gap being formed（11）In set
It is equipped with the cushion of 2 cm thicks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720128725.8U CN206570839U (en) | 2017-02-13 | 2017-02-13 | The U-shape structure of bridge pile foundation underpins transfer system |
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| CN201720128725.8U CN206570839U (en) | 2017-02-13 | 2017-02-13 | The U-shape structure of bridge pile foundation underpins transfer system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759458A (en) * | 2017-02-13 | 2017-05-31 | 中铁十九局集团轨道交通工程有限公司 | The U-shape structure of bridge pile foundation underpins transfer system and its applies method |
| CN113463518A (en) * | 2021-06-21 | 2021-10-01 | 中铁十九局集团第五工程有限公司 | Anti-leakage construction method for soil between piles of existing bridge pile foundation |
-
2017
- 2017-02-13 CN CN201720128725.8U patent/CN206570839U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759458A (en) * | 2017-02-13 | 2017-05-31 | 中铁十九局集团轨道交通工程有限公司 | The U-shape structure of bridge pile foundation underpins transfer system and its applies method |
| 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 |
| CN113463518A (en) * | 2021-06-21 | 2021-10-01 | 中铁十九局集团第五工程有限公司 | Anti-leakage construction method for soil between piles of existing bridge pile foundation |
| CN113463518B (en) * | 2021-06-21 | 2022-12-09 | 中铁十九局集团第五工程有限公司 | Anti-leakage construction method for soil between piles of existing bridge pile foundation |
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