CN212670144U - Composite retaining structure and retaining system next to existing track roadbed - Google Patents
Composite retaining structure and retaining system next to existing track roadbed Download PDFInfo
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- CN212670144U CN212670144U CN202021230720.4U CN202021230720U CN212670144U CN 212670144 U CN212670144 U CN 212670144U CN 202021230720 U CN202021230720 U CN 202021230720U CN 212670144 U CN212670144 U CN 212670144U
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- road bed
- pile
- bearing structure
- retaining
- bracket
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- 239000002131 composite material Substances 0.000 title claims description 20
- 239000002689 soil Substances 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims abstract description 12
- 239000004567 concrete Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 17
- 238000006073 displacement reaction Methods 0.000 abstract description 12
- 238000005452 bending Methods 0.000 description 9
- 230000002787 reinforcement Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a road bed engineering technical field, especially a compound retaining structure and a system of retaining of next-door neighbour's existing track road bed, wherein compound retaining structure includes the piler plate wall structure that line both sides set up along, is provided with bearing structure between two piler plate wall structures, and bearing structure encloses into the U type groove space that is used for filling the road bed of newly-building with the piler plate wall structure of both sides, and the inboard in opposite directions of two piler plate wall structures all is connected with the bracket, and the bracket is located bearing structure below and supports bearing structure. The utility model provides a compound retaining structure of next-door neighbour's existing track road bed, not only as the road bed retaining, still do road bed bearing structure concurrently, bearing structure acts on the bracket with the vertical load of the new road bed of building in top, offset the forward moment of flexure that soil pressure produced the pile plank wall structure, the displacement of effective control pile bolck just can make pile plank wall structure moment of flexure distribute evenly, the specification and the reinforced expense of ground that have reduced pile plank wall structure, reduce the construction expense of road bed.
Description
Technical Field
The utility model relates to a road bed engineering technical field, especially a compound retaining structure and a retaining system of existing track road bed of next-door neighbour.
Background
With the rapid development of high-speed railways, roadbeds built adjacent to existing high-speed railways are more and more common, ballastless tracks are sensitive to abnormal deformation of foundations, and when the foundations are soft soil layers, accessory stress generated on the existing ballastless track foundations by adjacent newly built roadbeds is eliminated, so that the newly built roadbeds are usually reinforced by reinforced concrete pile net structures, pile plate structures or CFG piles which do not extrude soil.
In addition, when the two sides of the newly-built roadbed are both the existing ballastless tracks and the elevation of the newly-built roadbed is higher than that of the existing roadbed, besides the reinforcement of the foundation, the supporting and blocking structures are arranged on the two sides to solve the problems, the supporting and blocking structures usually adopt a sheet pile wall or a cantilever type retaining wall, and at the moment, the construction cost of the roadbed is greatly increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the problems that in the prior art, when the two sides of a newly built roadbed are both provided with ballastless tracks and the elevation of the newly built roadbed is higher than that of the existing roadbed, except for reinforcing the foundation, a supporting structure usually adopts a sheet pile wall or a cantilever type retaining wall, so that the construction cost of the roadbed is greatly increased, the composite supporting structure and the supporting system close to the existing roadbed are provided, the stress of the sheet pile wall or the cantilever type retaining wall can be effectively reduced, the specification of the sheet pile wall or the cantilever type retaining wall is reduced, and the construction cost of the roadbed is further reduced.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides a compound retaining structure of next-door neighbour's existing track road bed, includes the pile board wall structure that the line both sides set up along the line, two be provided with bearing structure between the pile board wall structure, bearing structure and both sides the pile board wall structure encloses into the U type groove space that is used for filling the road bed of newly-building, two the inboard in opposite directions of pile board wall structure all is connected with the bracket, the bracket is located the bearing structure below, and support bearing structure.
The utility model provides a compound retaining structure of next-door neighbour's existing track road bed, bearing structure and both sides the pile slab wall structure encloses into U type groove space for fill the new road bed of building, pile slab wall structure, bracket and bearing structure constitute composite construction jointly, not only regard as road bed retaining, still do road bed bearing structure concurrently, have reduced the expense of ground reinforcement, have practiced thrift the investment greatly, moreover, bearing structure is used the vertical load of the new road bed of building in the top on the bracket to this produces a negative-going moment of bending that tends to the circuit side to pile slab wall structure, offsets the positive moment of bending that soil pressure produced to pile slab wall structure, and the displacement of effective control pile bolck just can make pile slab wall structure moment of bending distribution even, can further reduce the specification of pile slab wall structure, and then reduce the expense of building of road bed.
Preferably, the pile sheet wall structure includes two at least pile foundations that set up along the line interval, and is adjacent be connected with between the pile foundation and keep off the native board, the bracket with the pile foundation is connected.
The utility model discloses a road bed bearing structure, including foundation, bracket, bearing structure, foundation, and effective control pile bolck displacement, the bearing structure constitutes composite construction jointly, not only props up as the road bed, still does the road bed bearing structure concurrently, has reduced the reinforced (rfd) expense of foundation, has practiced thrift the investment greatly, moreover, bearing structure is used for the vertical load of road bed newly built in top on the bracket to this produces a negative-going moment of flexure that tends to the line side to the pile foundation, offsets the forward moment of flexure that soil pressure produced the pile foundation, and effective control pile bolck displacement just can make pile foundation moment of flexure distribute evenly, can further reduce pile length and pile footpath.
Preferably, the bracket with the pile foundation is integrated into one piece and pours fashioned structure to make the bracket with the power transmission effect of pile foundation is better.
Preferably, the corbel width L is [2m, 4m ].
Preferably, the inner side of the retaining plate is provided with a reverse filtering layer, and water in the newly-built roadbed filling can be discharged to the inner side of the retaining plate along the reverse filtering layer and discharged along the drainage holes arranged on the retaining plate.
Preferably, the bearing structure is a structural member formed by filling crushed stones, and at least two layers of geogrids are arranged in the bearing structure at vertical intervals.
The application also discloses a retaining system, include like this application compound retaining structure, fill in U type groove space and build the road bed of newly-built, be provided with the track on the road bed of newly-built.
A fender system, bearing structure and both sides the peg board wall structure encloses into U type groove space, and the road bed of newly-building fills in U type groove space, bearing structure acts on the bracket with the vertical load of the newly-built road bed of top to this produces a negative-going moment of bending that tends to the line side to peg board wall structure, offsets the forward moment of bending that soil pressure produced to peg board wall structure, and the displacement of effective control pile bolck just can make peg board wall structure moment of bending distribution even, can further reduce the specification of peg board wall structure, and then reduces the construction expense of road bed, moreover, composite construction is constituteed jointly to peg board wall structure, bracket and bearing structure not only as the road bed fender, still do the road bed bearing structure concurrently, has reduced ground reinforced's expense, has practiced thrift the investment greatly.
Preferably, the new roadbed is a light concrete filled structural member.
Preferably, the track is a ballast track, the bearing structure is a structural member formed by filling crushed stones, and at least two layers of geogrids are arranged in the bearing structure at vertical intervals.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model provides a compound retaining structure of next-door neighbour's existing track road bed, pile slab wall structure, bracket and bearing structure constitute composite construction jointly, not only as the road bed retaining, still do road bed bearing structure concurrently, reduced the reinforced expense of ground, practiced thrift the investment greatly, moreover, bearing structure acts on the bracket with the vertical load of the new road bed of building in top to this produces a negative-going moment of flexure that tends to the line side to pile slab wall structure, offsets the forward moment of flexure that soil pressure produced pile slab wall structure, and the displacement of effective control pile bolck just can make pile slab wall structure moment of flexure distribution even, can further reduce the specification of pile slab wall structure, and then reduces the construction cost of road bed.
2. The utility model provides a compound retaining structure of next-door neighbour's existing track road bed, pile foundation, bracket and bearing structure constitute composite construction jointly, not only as the road bed retaining, still do road bed bearing structure concurrently, reduced the reinforced expense of ground, practiced thrift the investment greatly, moreover, bearing structure is used in the vertical load of road bed is newly built to the top on the bracket to this produces a negative-going moment of flexure that tends to the line side to the pile foundation, offsets the forward moment of flexure that soil pressure produced the pile foundation, and the displacement of effective control pile top just can make pile foundation moment of flexure distribute evenly, can further reduce pile length and pile path.
3. The utility model provides a compound retaining structure of next-door neighbour's existing track road bed, the bracket with the pile foundation is fashioned structure is pour as an organic whole, thereby makes the bracket with the biography power effect of pile foundation is better.
4. The utility model provides a fender system, the newly-built road bed is filled in U type groove space, bearing structure acts on the bracket with the vertical load of the newly-built road bed in top to this produces a negative-going moment of flexure that tends to the line side to the piler wall structure, offsets the forward moment of flexure that soil pressure produced the piler wall structure, and the displacement of effective control pile bolck just can make the distribution of piler wall structure moment of flexure even, can further reduce the specification of piler wall structure, and then reduces the construction cost of road bed, moreover, the piler wall structure, bracket and bearing structure constitute composite construction jointly, not only regard as the road bed fender, still do road bed bearing structure concurrently, reduced the expense of ground reinforcement, practiced thrift the investment greatly.
Drawings
Fig. 1 is a schematic structural cross-sectional view of a retaining system of the present invention.
Fig. 2 is an enlarged view of a portion a of fig. 1 according to the present invention.
Fig. 3 is a schematic view (overlooking) of the bearing structure and the bracket of the present invention.
Fig. 4 is the utility model discloses a cooperation schematic diagram of pile foundation and bracket.
The labels in the figure are: 1-pile foundation, 2-bracket, 3-bearing structure, 4-earth retaining plate, 5-inverted filter layer, 6-pile plate wall structure, 7-newly built roadbed, 8-track, 9-stable foundation and 10-existing ballastless track roadbed.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
As shown in fig. 1-4, a composite retaining structure for use adjacent existing railroad beds, comprising:
the pile plate wall structure 6 is arranged on two sides of the line, the pile plate wall structure 6 comprises at least two pile foundations 1 arranged at intervals along the line, and a soil retaining plate 4 is connected between every two adjacent pile foundations 1;
the pile foundation 1 is a bearing supporting and retaining structure which transmits soil pressure generated by the newly built roadbed 7 to the stable foundation 9 and is longitudinally arranged at intervals;
the bracket 2 is arranged in the middle of the pile foundation 1 and used for placing the bearing structure 3 and transmitting the load of the newly-built roadbed 7 at the upper part to the middle of the pile foundation 1, and the bracket 2 is connected with the pile foundation 1;
the bearing structure 3 is arranged above the bracket 2 and used for supporting a newly built roadbed 7 at the upper part;
the soil retaining plate 4 is arranged between the pile foundation 1 and the newly built roadbed 7;
and the inverted filter layer 5 is arranged between the retaining plate 4 and the newly-built roadbed 7.
As shown in fig. 1 and 2, the utility model discloses constitute composite construction with pile foundation 1, bracket 2 and bearing structure 3, not only regard as the road bed to keep off, still do road bed bearing structure concurrently, reduced the reinforced and fixed expense of ground, practiced thrift the investment greatly.
As shown in fig. 1 and 2, the utility model provides a bearing structure 3 is used in bracket 2 with the vertical load effect of top fill to this produces a negative-going moment of flexure that tends to the line side to pile foundation 1, offsets the forward moment of flexure that the soil pressure of newly-built road bed 7 produced pile foundation 1, and the displacement of effective control pile bolck just can make 1 moment of flexure distribution of pile foundation even, can further reduce the pile length and pile footpath.
The bearing structure 3 may or may not be connected to the pile foundations 1 or the retaining plate 4.
As shown in fig. 4, the width of the bracket 2 depends on the height of the filled soil and the soil pressure after the pile, and is comprehensively determined according to the displacement of the pile top and the distribution of the internal force of the pile body, and is generally 2-4 m.
As shown in fig. 1 and 2, the type of the bearing structure 3 depends on the type of the upper newly-built track, and if the upper newly-built track is a ballastless track sensitive to deformation anomaly, the bearing structure 3 can be a reinforced concrete slab; if the newly-built track on the upper portion is a ballasted track insensitive to deformation, the bearing structure 3 can be a high-strength geogrid with two layers of gravel clips.
On the basis, in a further preferable mode, the bracket 2 and the pile foundation 1 are structural members formed by casting integrally.
On the basis, in a further preferable mode, the bearing structure 3 is a structural member formed by filling crushed stones, and at least two layers of geogrids are vertically arranged in the bearing structure 3 at intervals.
The beneficial effect of this embodiment does: this embodiment a compound retaining structure of next-door neighbour's existing track road bed constitute composite construction with pile foundation 1, bracket 2 and bearing structure 3, not only as the road bed and prop up the fender, still do the road bed bearing structure concurrently, reduced the reinforced and firm expense of ground, practiced thrift the investment greatly. In addition, bearing structure 3 acts on bracket 1 with the vertical load of top fill to this produces a negative-going moment of flexure that tends to the line side to pile foundation 1, offsets the forward moment of flexure that soil pressure produced pile foundation 1, and effective control pile bolck displacement just can make 1 moment of flexure distribution of pile foundation even, can further reduce pile length and pile footpath, the utility model provides a when being located soft foundation section, the two side next-door neighbour build the road bed fender that the road bed exists of newly-built road bed exists and the technological problem of ground reinforcement dual processing investment increase when having ballastless track road bed 10, have novel structure, safe and reliable, characteristics such as investment cost is low, and application prospect is extensive.
And simultaneously, the structure also can only use under one side exists existing track road bed or the both sides all do not have existing track road bed's the condition.
Example 2
As shown in fig. 1 to 4, a retaining system according to embodiment 1 includes a composite retaining structure according to embodiment 1, a new roadbed 7 is filled in the U-shaped groove space, and a track 8 is provided on the new roadbed 7.
As shown in fig. 1 and 2, the newly constructed road bed 7 may be made of general AB group soil or lightweight concrete.
The track 8 is a ballast track, the bearing structure 3 is a structural member formed by filling crushed stones, and at least two layers of geogrids are arranged in the bearing structure 3 at vertical intervals.
The type of the bearing structure 3 depends on the type of the upper newly-built track, and if the upper newly-built track 8 is a ballastless track sensitive to abnormal deformation, the bearing structure 3 can be a reinforced concrete slab; if the newly built track 8 on the upper part is a ballasted track insensitive to deformation, the bearing structure 3 can be a high-strength geogrid with two layers of gravel clips.
The beneficial effects of this embodiment: this embodiment a fender system, bearing structure 3 and both sides stake board wall structure 6 encloses into U type groove space, newly-built road bed 7 fills in U type groove space, bearing structure 3 acts on bracket 2 with the vertical load of the newly-built road bed 7 in top to this produces a negative bending moment that tends to the circuit side to stake board wall structure 6, offsets the forward bending moment that soil pressure produced to stake board wall structure 6, and effective control pile bolck displacement just can make 6 bending moments of stake board wall structure distribute evenly, can further reduce the specification of stake board wall structure 6, and then reduce the construction expense of road bed, moreover, stake board wall structure 6, bracket 2 and bearing structure 3 constitute composite construction jointly, not only as the road bed fender, still do the road bed bearing structure concurrently, reduced the expense of ground reinforcement, practiced thrift the investment greatly.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a compound retaining structure of next-door neighbour's existing track road bed which characterized in that: including the pile board wall structure (6) that the line both sides set up along the line, two be provided with bearing structure (3) between pile board wall structure (6), bearing structure (3) and both sides pile board wall structure (6) enclose into the U type groove space that is used for filling newly-built road bed (7), two the inboard in opposite directions of pile board wall structure (6) all is connected with bracket (2), bracket (2) are located bearing structure (3) below, and support bearing structure (3).
2. A composite retaining structure adjacent to existing track foundations as claimed in claim 1, wherein: pile sheet wall structure (6) include two at least pile foundation (1) that set up along the line interval, and are adjacent be connected with between pile foundation (1) and keep off native board (4), bracket (2) with pile foundation (1) are connected.
3. A composite retaining structure adjacent to existing track foundations as claimed in claim 2, wherein: bracket (2) with pile foundation (1) is the fashioned structure of integrative pouring.
4. A composite retaining structure adjacent to existing track foundations as claimed in claim 2, wherein: the width L of the bracket (2) is [2m, 4m ].
5. A composite retaining structure adjacent to existing track foundations as claimed in any one of claims 2 to 4, wherein: and a reverse filtering layer (5) is arranged on the inner side of the soil retaining plate (4).
6. A composite retaining structure adjacent to existing track foundations as claimed in any one of claims 1 to 4, wherein: bearing structure (3) are the structure that the rubble was filled and is formed, vertical interval is provided with two-layer geogrid at least in bearing structure (3).
7. A retaining system, characterized by: comprising a composite retaining structure according to any one of claims 1-6, wherein a new roadbed (7) is filled in the U-shaped groove space, and a track (8) is arranged on the new roadbed (7).
8. A retaining system according to claim 7, characterised in that: the new roadbed (7) is a structural member filled with lightweight concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021230720.4U CN212670144U (en) | 2020-06-29 | 2020-06-29 | Composite retaining structure and retaining system next to existing track roadbed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021230720.4U CN212670144U (en) | 2020-06-29 | 2020-06-29 | Composite retaining structure and retaining system next to existing track roadbed |
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| Publication Number | Publication Date |
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| CN212670144U true CN212670144U (en) | 2021-03-09 |
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| CN202021230720.4U Expired - Fee Related CN212670144U (en) | 2020-06-29 | 2020-06-29 | Composite retaining structure and retaining system next to existing track roadbed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458042A (en) * | 2022-02-22 | 2022-05-10 | 中建八局轨道交通建设有限公司 | Construction method for newly building plate above existing subway station rail-mounted area |
| CN114541182A (en) * | 2022-01-17 | 2022-05-27 | 中铁工程设计咨询集团有限公司 | Double-channel stress compensation type high-speed rail platform widening structure and construction method thereof |
| CN114673040A (en) * | 2022-03-18 | 2022-06-28 | 中铁二院成都勘察设计研究院有限责任公司 | Roadbed supporting structure |
-
2020
- 2020-06-29 CN CN202021230720.4U patent/CN212670144U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541182A (en) * | 2022-01-17 | 2022-05-27 | 中铁工程设计咨询集团有限公司 | Double-channel stress compensation type high-speed rail platform widening structure and construction method thereof |
| CN114541182B (en) * | 2022-01-17 | 2023-06-20 | 中铁工程设计咨询集团有限公司 | Double-channel stress compensation type high-speed railway platform widening structure and construction method thereof |
| CN114458042A (en) * | 2022-02-22 | 2022-05-10 | 中建八局轨道交通建设有限公司 | Construction method for newly building plate above existing subway station rail-mounted area |
| CN114458042B (en) * | 2022-02-22 | 2023-08-11 | 中建八局轨道交通建设有限公司 | Construction method for newly-built plate above rail-mounted area of existing subway station |
| CN114673040A (en) * | 2022-03-18 | 2022-06-28 | 中铁二院成都勘察设计研究院有限责任公司 | Roadbed supporting structure |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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