CN212316951U

CN212316951U - Roadbed structure for side slope

Info

Publication number: CN212316951U
Application number: CN201922295536.1U
Authority: CN
Inventors: 王祥; 周根郯; 李小和; 郭建湖; 熊林敦; 介玉新; 窦鸿威
Original assignee: China Railway Siyuan Survey and Design Group Co Ltd
Current assignee: China Railway Siyuan Survey and Design Group Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2021-01-08
Anticipated expiration: 2029-12-19

Abstract

The utility model provides a roadbed structure for side slope, include: the bearing structures are embedded in the slope body at intervals along the direction of a slope toe line of the slope; the retaining wall is arranged on the bearing structure; the roadbed panel extends into the slope body and is borne on the retaining wall, and the roadbed panel is arranged along the direction of the toe line; and the roadbed filling is filled between the retaining wall and the slope surface to support the roadbed panel. This a roadbed structure for side slope adopts the barricade to fill and receives the slope, adopts the roadbed panel to pass through the barricade with the road surface load and transmits to bearing structure, has reduced wall back of the body soil pressure, has consolidated roadbed structure's security, has improved roadbed engineering's stability. The use of the roadbed structure for the side slope can reduce the filling and excavating engineering quantity, reduce the damage to the environment, is economic and environment-friendly, and improves the economical efficiency and the rationality of the roadbed structure.

Description

Roadbed structure for side slope

Technical Field

The utility model relates to a roadbed structure technical field, in particular to roadbed structure for side slope.

Background

Most of the mountainous area traffic construction projects are constructed along valley and river channels, or tunnels are dug, or deep excavation is carried out by high filling, and the project stability is poor. Meanwhile, the engineering quantity of earth and stone excavation is large, part of abandoned slag is abandoned into a nearby wasteland or river valley due to inconvenient transportation, the bed surface of the river bed is lifted, the side surface is extruded, flood is blocked, the ecological environment is seriously damaged, and the slope is easily unbalanced, so that debris flow or landslide is caused, the safety and environmental protection benefits are poor, the cost performance is not high, and the method does not accord with the current advocated environmental protection, conservation and low-carbon trend.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a roadbed structure for side slope to solve among the prior art poor stability of side slope mountain road base engineering and easily lead to the technical problem that ecological environment destroys.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a roadbed structure for side slope, include: the bearing structures are embedded in the slope body at intervals along the direction of a slope toe line of the slope; the retaining wall is arranged on the bearing structure; the roadbed panel extends into the slope body and is borne on the retaining wall, and the roadbed panel is arranged along the direction of the toe line; and the roadbed filler is filled between the retaining wall and the slope surface to support the roadbed panel.

Further, roadbed structure still including being used for fixing the stock of barricade, the stock by the surface of barricade is inserted the barricade, and passes the barricade with roadbed filler gets into in the sloping.

Furthermore, the retaining wall is a balance weight type retaining wall, and the height of the balance weight type retaining wall is 6 m-12 m.

Further, bearing structure includes pile foundation and supporting bench, the pile foundation bury underground in the slope, the supporting bench install in lie in on the pile foundation the external one end of slope, the barricade bear in on the supporting bench.

Furthermore, the roadbed structure also comprises a greening groove arranged on the outer surface of the retaining wall, and a groove-shaped space is formed by the greening groove and the outer surface of the retaining wall; the greening groove extends along the direction of the toe line.

Furthermore, the surface of barricade lays the multirow afforestation groove, the multirow afforestation groove is in the interval sets up on the surface of barricade.

Further, the roadbed structure comprises a connecting piece, and the greening grooves are connected with the retaining walls through the connecting piece.

Furthermore, the greening groove comprises a body and a shielding piece perpendicular to the body, the body is mounted on the retaining wall, and the shielding piece is connected with the body.

Further, the roadbed structure further comprises a drain pipe buried in the retaining wall, wherein the drain pipe extends from the inner surface of the retaining wall to the outer surface of the retaining wall.

Further, the drain pipe is made of PVC materials.

The utility model provides a roadbed structure for side slope adopts the barricade to fill and receives the slope, adopts the roadbed panel to pass through the barricade with the road surface load and transmits to bearing structure, has reduced wall back of the body soil pressure, has consolidated roadbed structure's security, has improved roadbed engineering's stability. The roadbed structure of above-mentioned side slope's use can reduce and fill out excavation engineering volume, reduces the destruction to the environment, and economic environmental protection has promoted roadbed structure's economic nature and rationality.

Drawings

Fig. 1 is a schematic cross-sectional view of a roadbed structure for a side slope according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a roadbed structure for a side slope according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of the retaining wall shown in FIG. 1;

FIG. 4 is a schematic view of the connection structure of the greening grooves and the retaining walls shown in FIG. 1.

Description of reference numerals:

1. side slope; 1a, a slope body; 1b, a slope surface;

10. a load bearing structure; 11. a pile foundation; 12. a support table; 20. retaining walls; 30. a roadbed panel; 40. roadbed filling; 50. an anchor rod; 60. a greening groove; 61. a body; 62. a shield; 70. a drain pipe; 80. a water barrier layer; 90. a connecting member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, an embodiment of the present application provides a roadbed structure for a side slope, which includes a plurality of bearing structures 10 embedded in a slope body 1a at intervals along a toe line direction of the side slope 1; a retaining wall 20 mounted on the load bearing structure 10; the roadbed panel 30 extends into the slope body 1a and is borne on the retaining wall 20, and the roadbed panel 30 is arranged along the direction of the toe line; and roadbed filling 40 filled between the retaining wall 20 and the slope surface 1b to support the roadbed panel 30.

Most of the roadbeds for mountain traffic engineering are along valley and river channels, the terrains of individual sections are steep, the height of filling and digging side slopes is large, the engineering stability is poor, and the ecological environment is seriously damaged. The roadbed structure of the embodiment of the application supports the roadbed panel 30 through the plurality of bearing structures 10 arranged along the direction of the toe line and the retaining wall 20 arranged on the bearing structures 10, fills roadbed fillers 40 between the retaining wall 20 and the slope surface 1b of the side slope 1, ensures the stability of the roadbed structure of the side slope 1, increases the width of the roadbed surface, reduces excavation and reduces damage to the ecological environment.

In the embodiment of the present application, the bearing structure 10 is embedded in the slope body 1a, so as to ensure the stability and safety of the retaining wall 20 and the road base panel 30 on the bearing structure 10. A plurality of bearing structure 10 are buried underground along the direction interval of toe line, make road surface load and barricade 20 load homodisperse on a plurality of bearing structure 10, improve roadbed structure's stability and security. The retaining wall 20 is mounted on the load bearing structure 10 with the load bearing structure 10 as a support. The retaining wall 20 can be selected from a pitched retaining wall 20, a counter-balanced retaining wall 20, or a buttress retaining wall 20.

In the embodiment of the present application, the retaining wall 20 is a balance weight retaining wall 20, and the height of the balance weight retaining wall 20 is 6m to 12 m. The balance weight type retaining wall 20 is a retaining wall which resists the lateral pressure of the soil body by moving the center of gravity of the wall body in a direction approaching the side slope 1 by using the gravity of the roadbed filling 40 on the upper portion of the balance weight table, and is also a kind of gravity type retaining wall. The bearing structure 10 is poured, and the weighing type retaining wall 20 is constructed after the concrete strength meets the design requirement. Specifically, the weighted retaining wall 20 is cast in place using C35 concrete. The height, width and other dimensions of the wall 20 are determined on a case-by-case basis, and the top of the wall is provided with C30 concrete cap stones.

The roadbed filling 40 is generally backfill soil, and the backfill soil is filled layer by layer and tamped layer by layer. The uniformly filled and compacted backfill can enhance the stability of the roadbed panel 30 and further improve the safety of the roadbed structure.

In the present embodiment, the road surface board 30 is horizontally disposed. The roadbed panel 30 directly bears the pavement load, and transmits the pavement load to the bearing structure 10 through the retaining wall 20, so that the pressure of the retaining wall 20 can be reduced, and the overall stability of the roadbed structure is improved. One end of the roadbed panel 30 is embedded in the slope 1a, and the other end is supported on the retaining wall 20. The roadbed structure may include one or more roadbed panels 30, and a plurality of roadbed panels 30 are arranged along the direction of the toe line. Specifically, in the embodiment of the present application, the road-base slab 30 is a precast concrete slab of C35 or a cast-in-place concrete slab.

The application provides a roadbed structure for side slope can be used to high steep hard rock side slope district, adopts barricade 20 to fill and receive the slope, adopts roadbed panel 30 to transmit the road surface load to bearing structure 10 through barricade 20, has reduced wall back of the body soil pressure, has consolidated roadbed structure's security, has improved roadbed engineering's stability. The use of the roadbed structure for the side slope can reduce the filling and excavating engineering quantity, reduce the damage to the environment, is economic and environment-friendly, and improves the economical efficiency and the rationality of the roadbed structure.

In some embodiments, the roadbed structure further includes anchor rods 50 for fixing the retaining wall 20, and the anchor rods 50 are inserted into the retaining wall 20 from the outer surface of the retaining wall 20 and penetrate through the retaining wall 20 and the roadbed filling 40 into the slope body 1 a. The anchor rods 50 can increase the coordination and stability of the retaining wall 20, the roadbed fillers 40 and the natural slope body 1a are uniformly anchored by the anchor rods 50, the roadbed structure and the side slope 1 are ensured to form a uniform whole, and the integrity and the safety of the roadbed structure are improved. Specifically, the anchor rods 50 are made of HRB 335-grade steel bars with the diameter of 25mm, the length and the number of the anchor rods 50 can be determined according to structural stability check, and the length of the anchor rods 50 needs to extend to a position below an unstable slip crack surface of the side slope 1.

In some embodiments, the bearing structure 10 includes a pile foundation 11 and a supporting platform 12, the pile foundation 11 is buried in the slope body 1a, the supporting platform 12 is installed at one end of the pile foundation 11 located outside the slope body 1a, and the retaining wall 20 is supported on the supporting platform 12. That is to say, supporting table 12 is installed in the top of pile foundation 11, and further the top of pile foundation 11 is embedded into supporting table 12 in, makes pile foundation 11 and supporting table 12 be connected more firmly, provides more stable foundation structure for the roadbed structure, makes roadbed structure safe and reliable. For the steep slope with instability or small and medium-sized landslides, the combination of the pile foundation 11, the supporting platform 12 and the anchor rod 50 in a stable mode effectively anchors the unstable slope body 1a, improves the stability of the slope surface 1b, has safe structure, reduces the engineering excavation amount, and can ensure the stability of the retaining wall 20 in the steep slope section.

Specifically, the pile foundation 11 is generally a cast-in-situ bored pile or a manually excavated pile, and may be determined comprehensively according to site conditions, topographic conditions, and geological conditions. The pile foundation 11 is cast in situ by C35 reinforced concrete, and the pile type, the pile length and the pile spacing are determined according to actual conditions. After the concrete strength of the pile foundation 11 meets the design requirement, a supporting platform 12 can be constructed at the top of the pile foundation 11. The support table 12 is cast in situ using C35 reinforced concrete.

In some embodiments, the roadbed structure further comprises a greening groove 60 installed on the outer surface of the retaining wall 20, and the greening groove 60 and the outer surface of the retaining wall 20 enclose a groove-shaped space; the greening grooves 60 extend in the direction of the toe line. It can be understood that the greening grooves 60 on the outer surface of the retaining wall 20 are used for planting plants, such as climbing plants or dropping plants, to achieve the effect of green protection of the slope surface 1b, so that the roadbed structure can be better coordinated with the surrounding environment. The specific structure of the greening groove 60 is not limited, and the greening groove may be a split structure or an integrally formed structure. Further, the greening groove 60 comprises a body 61 and a shielding piece 62 perpendicular to the body 61, the body 61 is mounted on the retaining wall 20, and the shielding piece 62 is connected with the body 61. In the embodiment of the present application, the body 61 and the shielding member 62 are preferably integrally formed, and the groove-like space formed between the body 61 and the shielding member 62 and the outer surface of the retaining wall 20 is used for planting various plants, thereby realizing the greening and protecting functions.

Further, the roadbed structure includes a connector 90, and the greening groove 60 is connected with the retaining wall 20 through the connector 90. Specifically, referring to fig. 4, the connecting member 90 is a structural steel bar with two hook-shaped ends, the greening groove 60 is cast in situ using C35 concrete, and the structural steel bar is reserved at the position where the greening groove 60 is installed when the counterweight-type retaining wall 20 is cast, so as to connect the greening groove 60 and the retaining wall 20. Further, a plurality of rows of greening grooves 60 are formed on the outer surface of the retaining wall 20, and the plurality of rows of greening grooves 60 are spaced apart from each other on the outer surface of the retaining wall 20. Specifically, the greening grooves 60 are generally arranged in 3-4 rows along the outer surface of the retaining wall 20, and the size, such as depth and width, of the greening grooves 60 is determined according to the plant growth requirement.

In some embodiments, the roadbed structure further includes a drain pipe 70 embedded in the retaining wall 20, and the drain pipe 70 extends from the inner surface of the retaining wall 20 to the outer surface of the retaining wall 20. It is understood that the drain pipe 70 can drain the groundwater in the roadbed filling 40, enhance the stability of the roadbed filling 40, and thus enhance the safety of the roadbed structure. Specifically, a plurality of rows of drainage pipes 70 are embedded in the wall body of the balance weight retaining wall 20, referring to fig. 3, the drainage pipes 70 are arranged in 3 rows, and the drainage pipes 70 are made of PVC material. Wherein the PVC is polyvinyl chloride. In addition, a reverse filter layer made of geosynthetic materials is arranged in the range from the upper part of the drain pipe 70 at the lowest part of the back of the retaining wall 20 to the lower part of the top of the retaining wall 20, water-resisting layers 80 are arranged at the lowest position and the highest position of the reverse filter layer, and the water-resisting layers 80 are simultaneously cast with the wall body of the retaining wall 20 by adopting concrete.

The concrete construction method of the roadbed structure for the side slope comprises the following steps:

1. and constructing the pile foundation 11. The pile foundation 11 is generally a cast-in-situ bored pile or a manually excavated pile, and is determined comprehensively according to site conditions, topographic conditions and geological conditions. The pile body is cast in situ by C35 reinforced concrete, and the pile type, the pile length and the pile spacing are determined according to actual conditions.

2. The support table 12 is constructed. And (3) pouring the pile foundation 11, constructing a supporting platform 12 at the top of the pile after the concrete strength reaches the design requirement, and embedding the pile top into the supporting platform 12 to a certain depth. The bearing platform is cast in situ by C35 reinforced concrete.

3. The weighted retaining wall 20 is constructed. After the supporting table 12 is poured and the concrete strength reaches the design requirement, the weighing retaining wall 20 is constructed. The weight-balance retaining wall 20 is cast in situ by C35 reinforced concrete, the height, width and other dimensions of the wall are determined according to specific conditions, and C30 concrete cap stones are arranged on the top of the wall. The wall body of the weight-balance retaining wall 20 is provided with 3 rows of drain pipes 70 (pre-embedded), and the drain pipes 70 are made of PVC plastic drain pipes 70. A reverse filter layer of geosynthetic material is provided in the range from above the lowest drain pipe 70 on the back of the wall 20 to below the top of the wall 20. The lowest position and the highest position of the inverted filter layer are provided with a water-resisting layer 80, and the water-resisting layer 80 is poured with concrete and the wall body of the retaining wall at the same time.

When the weight-balanced retaining wall 20 is poured, a constructional steel bar is reserved at the position of the greening groove 60 and is used as a connecting steel bar between the later greening groove 60 and the retaining wall 20.

4. A rear wall base filler 40. And (3) completing the pouring of the balance weight type retaining wall, backfilling the wall after the concrete strength reaches the design requirement, and ramming the backfilled soil layer by layer.

5. The roadbed panel 30 is constructed. The roadbed panels 30 can be cast-in-place or precast slabs and are C35 reinforced concrete panels.

6. The anchor rods 50 are constructed. The anchor rod 50 is constructed by embedding the anchor rod 50 after pre-drilling and performing whole hole grouting reinforcement, wherein the aperture of the pre-drilling hole is generally 0.13m and is particularly adjustable. After the pre-drilling is finished and before the anchor rods 50 are embedded, steel pipes (or iron pipes) are embedded in the natural slope surface-roadbed filling-retaining wall section to protect the steel strands, and the steel pipes (or the iron pipes) need to enter the natural slope surface by more than 0.5 m. And embedding the anchor rods 50, injecting cement mortar, installing anchor piers after the grouting anchoring bodies reach the designed strength, and pre-tensioning according to the design requirement. The anchor pier adopts a bearing plate or prefabricated reinforced concrete. The anchor 50 needs to be deep below the unstable slip surface by a certain depth.

7. The greening grooves 60 are constructed. And after the anchor rods 50 are constructed, pouring a greening groove 60 structure at the position of the reserved constructional steel bars of the retaining wall 20. And (4) planting and maintaining the plants falling down (or climbing) in the greening groove 60 for a long time.

The embodiment of the application is used for the roadbed structure of the side slope, and a novel roadbed structure form is formed through comprehensive application of the pile foundation 11 bearing, the balance weight type retaining wall 20, the anchor rod 50 and the greening groove 60, so that the roadbed structure has the advantages of safety, reliability, economy and environmental protection, and has remarkable economic benefit and social benefit. The embodiment of the application is suitable for steep hard rock slope sections.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Moreover, the technical solutions of the present invention between the various embodiments can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are combined and contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and the present invention is not within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A roadbed structure for a side slope, the roadbed structure comprising:

the bearing structures are embedded in the slope body at intervals along the direction of a slope toe line of the slope;

the retaining wall is arranged on the bearing structure;

the roadbed panel extends into the slope body and is borne on the retaining wall, and the roadbed panel is arranged along the direction of the toe line;

and the roadbed filler is filled between the retaining wall and the slope surface to support the roadbed panel.

2. The roadbed structure for the side slope as claimed in claim 1, wherein the roadbed structure further comprises an anchor rod for fixing the retaining wall, and the anchor rod is inserted into the retaining wall from the outer surface of the retaining wall and penetrates through the retaining wall and the roadbed fillers to enter the side slope body.

3. The roadbed structure for the side slope according to claim 1, wherein the retaining wall is a counterweight retaining wall, and the height of the counterweight retaining wall is 6-12 m.

4. The roadbed structure for the side slope according to claim 1, wherein the bearing structure comprises a pile foundation and a support platform, the pile foundation is buried in the slope body, the support platform is installed at one end of the pile foundation, which is positioned outside the slope body, and the retaining wall is borne on the support platform.

5. The roadbed structure for the side slope according to any one of claims 1 to 4, wherein the roadbed structure further comprises a greening groove arranged on the outer surface of the retaining wall, and the greening groove and the outer surface of the retaining wall enclose a groove-shaped space; the greening groove extends along the direction of the toe line.

6. The roadbed structure for the side slope, according to claim 5, wherein a plurality of rows of the greening grooves are arranged on the outer surface of the retaining wall, and the plurality of rows of the greening grooves are arranged on the outer surface of the retaining wall at intervals.

7. The roadbed structure for the side slope, according to claim 5, wherein the roadbed structure includes a connector, and the greening grooves are connected with the retaining wall through the connector.

8. The roadbed structure for the side slope, according to claim 5, wherein the greening groove comprises a body and a shielding piece perpendicular to the body, the body is installed on the retaining wall, and the shielding piece is connected with the body.

9. The roadbed structure for the side slope according to any one of claims 1 to 4, wherein the roadbed structure further comprises a drain pipe buried in the retaining wall, and the drain pipe extends from the inner surface of the retaining wall to the outer surface of the retaining wall.

10. The roadbed structure for the side slope according to claim 9, wherein the drainage pipe is made of a PVC material.