CN218989752U - Road subgrade structure of underpass high-speed railway bridge - Google Patents
Road subgrade structure of underpass high-speed railway bridge Download PDFInfo
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- CN218989752U CN218989752U CN202223156420.8U CN202223156420U CN218989752U CN 218989752 U CN218989752 U CN 218989752U CN 202223156420 U CN202223156420 U CN 202223156420U CN 218989752 U CN218989752 U CN 218989752U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The utility model discloses a road subgrade structure of a downward-penetrating high-speed railway bridge, belongs to the technical field of road subgrades, and solves the problem that the safety of the bridge is easily endangered when a road which is newly built by a traditional method and is downward-penetrating an existing high-speed railway bridge is adopted. According to the utility model, pile board tables are respectively arranged at two sides of a railway bridge girder body, the pile board tables are connected with a conventional roadbed, a plurality of pile foundations are arranged at the bottoms of the pile board tables, a concrete slab girder is arranged between the two pile board tables, and a road pavement is paved above the concrete slab girder and the conventional roadbed. According to the utility model, the pile plate platforms are arranged at two sides of the railway bridge girder body, the concrete slab girder is arranged between the two pile plate platforms, and then the road pavement is paved on the concrete slab girder, so that the roadbed structure does not need to vibrate and roll in the railway bridge range, and the disturbance to the soil body around the piles of the high-speed railway bridge is avoided.
Description
Technical Field
The utility model belongs to the technical field of road foundations, and particularly relates to a road foundation structure of a high-speed railway bridge penetrating downwards.
Background
With the rapid development of social economy and town, the network of the high-speed railway is gradually perfected, the urban space is gradually enlarged, the high-speed railway passing through the city is already a barrier for further expansion of the city, and the number of the intersections between the road and the high-speed railway is also increased.
When a newly built road crosses an existing high-speed railway bridge, a crossing scheme of penetrating the existing high-speed railway bridge is generally adopted. Practice shows that when an existing high-speed railway bridge is penetrated down, if a new road adopts a conventional roadbed, the following problems can occur: firstly, the foundation treatment of a newly-built road subgrade and the vibration rolling of the original ground can disturb the soil body around the bridge pile foundation under the limitation of the span of the high-speed railway bridge, so that the bearing capacity and the stability of the bridge pile foundation are easily adversely affected, and the safety of the bridge is endangered. Secondly, the soil pressure of the roadbed can be transferred to the bridge pile foundation under the limitation of the span of the high-speed railway bridge, so that the bridge pile foundation is easily subjected to insufficient bearing capacity or horizontal displacement, and the safety of the bridge is endangered. Based on the above, it is necessary to invent a totally new roadbed structure.
Disclosure of Invention
The utility model aims to provide a road subgrade structure of a downward-penetrating high-speed railway bridge, which aims to solve the problem that the safety of the bridge is easily endangered when a road which is downward-penetrating the existing high-speed railway bridge is newly built by adopting a traditional method.
The technical scheme of the utility model is as follows: a road roadbed structure of a high-speed railway bridge is characterized in that pile board tables are respectively arranged on two sides of a railway bridge girder body, the pile board tables are connected with a conventional roadbed, a plurality of pile foundations are arranged at the bottoms of the pile board tables, a concrete slab girder is arranged between the two pile board tables, and a road pavement is paved above the concrete slab girder and the conventional roadbed.
As a further improvement of the utility model, the two sides of the concrete slab beam are provided with convex edges, and the tops of the convex edges are connected with the road surface.
As a further improvement of the utility model, stress isolation layers are arranged along the two sides of the bottom of the concrete slab beam, each stress isolation layer is formed by arranging 3 rows of steel pipe piles in a quincuncial pile manner, and cement paste is poured into the steel pipe piles.
As a further improvement of the utility model, a roadbed reinforcing layer is arranged at the bottom of the concrete slab beam, the roadbed reinforcing layer is arranged along the width direction of the concrete slab beam, the roadbed reinforcing layer is formed by arranging 3 rows of steel pipe piles in a quincuncial pile manner, and cement paste is poured into the steel pipe piles.
As a further improvement of the utility model, the roadbed reinforcing layer is positioned at 1/5 to 1/2 of the longitudinal range of the concrete slab beam.
The beneficial effects of the utility model are as follows:
1. according to the utility model, the pile plate platforms are arranged at two sides of the railway bridge girder body, the concrete slab girder is arranged between the two pile plate platforms, and then the road pavement is paved on the concrete slab girder, so that the roadbed structure does not need to vibrate and roll in the railway bridge range, and the disturbance to the soil body around the piles of the high-speed railway bridge is avoided.
2. The utility model has the advantages that the stress isolation layer and the roadbed reinforcing layer are arranged at the bottom of the concrete slab beam, and the concrete slab beam is supported, so that the bearing capacity of the foundation is enhanced, in addition, the stress isolation layer can also prevent load from being transmitted to the railway bridge bearing platform, and the operation safety of a high-speed railway is ensured.
3. The road bed structure of the utility model has a crossing length of more than 25m, and solves the problems that the distance between the longitudinal piles of the traditional pile plate road bed structure is smaller (the distance between the longitudinal piles is generally less than 10 m), the crossing capability is very limited, and the standard requirement for keeping a certain distance with a high-speed railway foundation is difficult to meet when a high-speed railway bridge is worn down.
4. The utility model has firm structure and small influence on the existing high-speed railway bridge, and is suitable for the high-speed railway bridge passing under the road. The roadbed structure reduces the influence on railway operation during road construction and construction, avoids the influence on additional load of a railway bearing platform during road operation, ensures the whole life cycle of a road, has multiple purposes and obvious effect, and has good popularization value.
Drawings
FIG. 1 is a schematic plan view of the present utility model;
FIG. 2 is a schematic longitudinal cross-sectional view of the present utility model;
fig. 3 is a schematic cross-sectional view of the present utility model.
In the figure: 1-a railway bridge body; 2-a railway bridge bearing platform; 3-railway bridge piers; 4-concrete slab beams; 41-convex edge; 5-pile board; 6-pile foundation; 7-a roadbed reinforcing layer; 8-stress isolation layer; 9-conventional roadbed; 10-road pavement.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-3, a road subgrade structure of a high-speed railway bridge is provided, pile slabs 5 are respectively arranged at two sides of a railway bridge girder body 1, the pile slabs 5 are connected with a conventional subgrade 9, a plurality of pile foundations 6 are arranged at the bottoms of the pile slabs 5, a concrete slab girder 4 is arranged between the two pile slabs 5, and a road pavement 10 is paved above the concrete slab girder 4 and the conventional subgrade 9.
The concrete slab beam 4 is provided with convex edges 41 on both sides, and the tops of the convex edges 41 are connected with the road surface 10.
The stress isolation layers 8 are arranged along two sides of the bottom of the concrete slab beam 4, each stress isolation layer 8 is formed by arranging 3 rows of steel pipe piles in a quincuncial pile mode, the pipe diameter of each steel pipe pile is 10-20 cm, the pile length is 4-6 m, the arrangement interval is 1-1.5 m, and cement paste is poured into each steel pipe pile. The grouting pressure is 0.8-1.0 Mpa.
The bottom of the concrete slab beam 4 is provided with a roadbed reinforcing layer 7, the roadbed reinforcing layer 7 is arranged along the width direction of the concrete slab beam 4, the roadbed reinforcing layer 7 is formed by arranging 3 rows of steel pipe piles in a quincuncial pile mode, the pipe diameter of the steel pipe piles is 10-20 cm, the pile length is 4-6 m, the arrangement interval is 1-1.5 m, and cement paste is poured into the steel pipe piles. The grouting pressure is 0.8-1.0 Mpa.
The roadbed reinforcement layer 7 is positioned at 1/5 to 1/2 of the longitudinal range of the concrete slab beam 4.
The pile board table 5 adopts a reinforced concrete structure, and the pile foundation 6 supports the pile board table 5.
The diameter of the steel pipe pile of the roadbed reinforcing layer 7 is 10-20 cm, the pile length is 4-6 m, and the arrangement interval is 1-1.5 m; cement slurry is poured into the steel pipe pile, and the grouting pressure is 0.8-1.0 Mpa.
The transverse plate edge of the concrete plate beam 3 is provided with a stress isolation layer 8, the stress isolation layer 8 consists of three rows of miniature steel pipe piles, the pipe diameter of the steel pipe piles is 10-20 cm, the pile length is 4-6 m, and the arrangement interval is 1-1.5 m; cement slurry is poured into the steel pipe pile, and the grouting pressure is 0.8-1.0 Mpa.
The roadbed structure does not need to shake, grind and disturb soil around the high-speed railway bridge pile in the railway bridge range; the stress isolation layer and the roadbed reinforcing layer are arranged to enhance the bearing capacity of the foundation, prevent the load from being transferred to the railway bridge bearing platform 2 and the railway bridge pier 3, and ensure the operation safety of the high-speed railway.
Claims (5)
1. The utility model provides a wear road roadbed structure of high-speed railway bridge down which characterized in that: pile board tables (5) are respectively arranged on two sides of a railway bridge girder body (1), the pile board tables (5) are connected with a conventional roadbed (9), a plurality of pile foundations (6) are arranged at the bottoms of the pile board tables (5), a concrete slab girder (4) is arranged between the two pile board tables (5), and a road pavement (10) is paved above the concrete slab girder (4) and the conventional roadbed (9).
2. The road subgrade structure of a underpass high-speed railway bridge as claimed in claim 1, wherein: convex edges (41) are arranged on two sides of the concrete slab beam (4), and the tops of the convex edges (41) and the road surface (10).
3. The road subgrade structure of a underpass high-speed railway bridge according to claim 1 or 2, characterized in that: stress isolation layers (8) are arranged along two sides of the bottom of the concrete slab beam (4), the stress isolation layers (8) on each side are formed by arranging 3 rows of steel pipe piles in a quincuncial pile mode, and cement paste is poured into the steel pipe piles.
4. A road subgrade structure for a underpass high speed railroad bridge as set forth in claim 3, wherein: the bottom of the concrete slab beam (4) is provided with a roadbed reinforcing layer (7), the roadbed reinforcing layer (7) is arranged along the width direction of the concrete slab beam (4), the roadbed reinforcing layer (7) is formed by arranging 3 rows of steel pipe piles in a quincuncial pile arrangement mode, and cement paste is poured into the steel pipe piles.
5. The road subgrade structure of a underpass high-speed railway bridge as claimed in claim 4, wherein: the roadbed reinforcing layer (7) is positioned at 1/5-1/2 of the longitudinal range of the concrete slab beam (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223156420.8U CN218989752U (en) | 2022-11-28 | 2022-11-28 | Road subgrade structure of underpass high-speed railway bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223156420.8U CN218989752U (en) | 2022-11-28 | 2022-11-28 | Road subgrade structure of underpass high-speed railway bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218989752U true CN218989752U (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223156420.8U Active CN218989752U (en) | 2022-11-28 | 2022-11-28 | Road subgrade structure of underpass high-speed railway bridge |
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| CN (1) | CN218989752U (en) |
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2022
- 2022-11-28 CN CN202223156420.8U patent/CN218989752U/en active Active
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