CN217324788U - Abrupt slope roadbed structure convenient to prefabrication installation - Google Patents

Abstract

The utility model relates to the technical field of roadbed construction, in particular to a steep slope roadbed structure convenient for prefabrication and installation, which comprises a slope roadbed and a reinforcing structure; the reinforced structure is including enlarging the basis, the prefabricated panel of L type, anchor subassembly and embankment banket, enlarge basic fixed mounting on the slope road bed, and be located one side of slope road bed, the prefabricated panel fixed mounting of L type is on enlarging the basis, the quantity of the prefabricated panel of L type is a plurality of, the prefabricated panel of a plurality of L types overlaps in proper order, it has the road bed banket to fill on every prefabricated panel of L type, anchor subassembly is fixed respectively and enlarges basis and the prefabricated panel of L type, can be to stabilizing the installation to the bridge in abrupt slope road bed department, make the abrupt slope bridge construction more convenient.

Description

A steep-slope subgrade structure that is convenient for prefabricated installation

technical field

The utility model relates to the technical field of roadbed construction, in particular to a steep-slope roadbed structure which is convenient for prefabrication and installation.

Background technique

At present, in mountain railways, highways and other projects, controlled by topographical conditions, there are a large number of slopes and steep slopes. It is difficult to use general grading for steep slope roadbeds. If the slope is unstable, it will endanger the integrity and stability of the roadbed and seriously affect the driving safety.

In order to ensure the safety of the structure, it is necessary to increase the size of the pile section, which will lead to an increase in project investment. In addition, the traditional pile wall has low rigidity and limited thrust. The structure can only be cast-in-place and cannot be prefabricated. The construction progress is extremely limited by the construction site.

When the bridge is installed on the steep slope subgrade, the excavation of the abutment foundation pit will brush the steep slope more, which will easily cause the instability of the slope behind the abutment and cause the landslide, which makes the construction of the steep slope bridge difficult.

Utility model content

The purpose of the utility model is to provide a steep-slope roadbed structure that is convenient for prefabrication and installation, and aims to solve the problem that when the steep-slope roadbed in the prior art is used for bridge installation, the excavation of the foundation pit of the bridge abutment is large for the steep slope, which is easy to cause the rear of the bridge abutment. The instability of the slope body causes landslides, which leads to the technical problem of difficult construction of bridges on steep slopes.

In order to achieve the above purpose, the utility model adopts a kind of steep slope roadbed structure which is convenient for prefabrication and installation, including the slope roadbed,

Also includes reinforcement structures;

The reinforcement structure includes an enlarged foundation, an L-shaped prefabricated panel, an anchor assembly and embankment filling, the enlarged foundation is fixedly installed on the slope roadbed and is located on one side of the slope roadbed, and the L-shaped prefabricated panel is fixed Installed on the enlarged basis, the number of the L-shaped prefabricated panels is multiple, and the plurality of the L-shaped prefabricated panels are overlapped in sequence, and the subgrade fill is filled on each of the L-shaped prefabricated panels. Anchoring assemblies respectively fix the enlarged foundation and the L-shaped prefabricated panel.

Wherein, the reinforcement structure further includes an enlarged foundation protruding stopper, the enlarged foundation protruding stopper is fixedly installed on the enlarged foundation, is fixedly connected with the L-shaped prefabricated panel, and is located close to the enlarged foundation. One side of the L-shaped prefabricated panel.

Wherein, the reinforcement structure further includes a concrete sealing layer, the concrete sealing layer is arranged between the enlarged foundation and the L-shaped prefabricated panel, and is respectively fixedly connected to the enlarged foundation and the L-shaped prefabricated panel.

Wherein, the reinforcement structure further includes an anti-filter layer, and the anti-filter layer is arranged on the L-shaped prefabricated panel and is located on the side of the L-shaped prefabricated panel close to the embankment filling.

Wherein, the reinforcement structure further includes a geogrid, and the geogrid is arranged in the embankment filling.

Wherein, the expansion base has expansion joints, and the expansion joints are arranged on the side of the expansion base close to the L-shaped prefabricated panel, the number of the expansion joints is multiple, and the multiple expansion joints are arranged in parallel and at intervals .

Wherein, the enlarged foundation protruding stopper has a drain hole, and the drain hole penetrates the enlarged foundation protruding stopper toward the direction of the L-shaped prefabricated panel.

According to the steep slope roadbed structure of the utility model, which is convenient for prefabrication and installation, the slope roadbed is first leveled and then compacted. Excavation of the enlarged foundation, then installing the foundation bolts in the enlarged foundation, and binding the reinforcing bars of the enlarged foundation, then pouring concrete, and installing the prefabricated bottom of the L-shaped prefabricated panel to the On the basis of the expansion, the front end of the L-shaped prefabricated panel is abutted and fixed with the protruding stopper of the enlarged foundation, the L-shaped prefabricated panel is overlapped and fixed, and then the subgrade fill is filled into the L-shaped prefabricated panel, Until the elevation of the road subgrade is reached, the bridge can be stably installed at the subgrade of the steep slope, which makes the construction of the steep slope bridge more convenient.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that are required to be used in the description of the embodiments or the prior art.

FIG. 1 is a schematic cross-sectional view of a steep-slope subgrade structure that is convenient for prefabrication and installation according to the first embodiment of the present invention.

FIG. 2 is an A-A cross-sectional view of the first embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a steep-slope roadbed structure that is convenient for prefabrication and installation according to the second embodiment of the present invention.

FIG. 4 is a schematic front view of a steep-slope roadbed structure that is convenient for prefabrication and installation according to the second embodiment of the present invention.

5 is a large cross-sectional view of the L-shaped prefabricated panel of the steep slope roadbed structure that is convenient for prefabrication and installation according to the second embodiment of the present invention.

6 is a large front view of the L-shaped prefabricated panel of the steep slope roadbed structure that is convenient for prefabrication and installation according to the second embodiment of the present invention.

FIG. 7 is an enlarged basic schematic diagram of the second embodiment of the present invention.

8 is a front view of the enlarged base protruding stopper B-B of the second embodiment of the present invention.

In the picture: 101-slope roadbed, 102-expanded foundation, 103-L-shaped prefabricated panel, 104-anchor component, 105-embankment filling, 106-expanded foundation protruding block, 107-concrete sealing layer, 108-geogrid Fence, 109-foundation anchor rod, 110-anchor cable, 111-reserved anchor cable hole, 112- excavation step line, 114-soil boundary line, 201-reverse filter layer, 202- expansion joint, 203- drain hole.

Detailed ways

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention and should not be construed as Limitations of the present invention.

The first embodiment of the present application is:

Please refer to FIG. 1 and FIG. 2 , the present invention provides a steep slope roadbed structure that is convenient for prefabrication and installation, including a slope roadbed 101,

Also includes reinforcement structures;

The reinforcement structure includes an enlarged foundation 102, an L-shaped prefabricated panel 103, an anchoring assembly 104 and an embankment filling 105. The enlarged foundation 102 is fixedly installed on the slope roadbed 101 and is located on one side of the slope roadbed 101, The L-shaped prefabricated panels 103 are fixedly installed on the enlarged foundation 102. The number of the L-shaped prefabricated panels 103 is multiple, and a plurality of the L-shaped prefabricated panels 103 are stacked in sequence, and each L-shaped prefabricated panel 103 is filled with the subgrade fill, and the anchor components 104 respectively fix the enlarged foundation 102 and the L-shaped prefabricated panel 103 . The reinforcement structure further includes an enlarged foundation protruding block 106, the enlarged foundation protruding stop 106 is fixedly installed on the enlarged foundation 102, and is fixedly connected with the L-shaped prefabricated panel 103, and is located in the enlarged foundation 103. The foundation 102 is close to one side of the L-shaped prefabricated panel 103 . The reinforcement structure further includes a concrete sealing layer 107, which is arranged between the enlarged foundation 102 and the L-shaped prefabricated panel 103, and is respectively fixedly connected to the enlarged foundation 102 and the L-shaped prefabricated panel 103. . The reinforcement structure further includes a geogrid 108 disposed within the embankment fill 105 . The anchoring assembly 104 includes a foundation bolt 109 and an anchor cable 110. One end of the foundation bolt 109 is connected to the enlarged foundation 102, and the other end of the foundation bolt 109 extends into the slope roadbed 101 for fixation; One end of the anchor cable 110 is connected to the L-shaped prefabricated panel 103 , and the other end of the anchor cable 110 is extended into the slope roadbed 101 to be fixed. The L-shaped prefabricated panel 103 has a reserved anchor cable hole 111, and the reserved anchor cable hole 111 is arranged on the side of the L-shaped prefabricated panel 103 close to the anchor cable 110, and one end of the anchor cable 110 extends. into the reserved anchor cable hole 111 .

The enlarged foundation 102 is cast-in-situ with reinforced concrete, and the foundation anchor rod 109 is installed inside. The length of the bolt is 10.0m, and the diameter of the bolt hole is φ110mm to improve the anti-slip and anti-overturning ability of the enlarged foundation 102. After the foundation bolt 109 is poured, the enlarged foundation 102 and the protruding block of the enlarged foundation can be poured 106. The enlarged foundation protruding block 106 is set on the top surface. The enlarged foundation 102, the enlarged foundation protruding stop 106 and the foundation anchor rod 109 are cast-in-place to form a whole. The protruding stopper 106 limits the horizontal displacement of the L-shaped prefabricated panel 103 to ensure the safety and stability of the structure; the height of the enlarged foundation 102 is 4m; the L-shaped prefabricated panel 103 is prefabricated with reinforced concrete, and a single panel is 5m long and 4m high. The thickness is 0.5m; the L-shaped prefabricated panel 103 is provided with the reserved anchor cable hole 111 in the middle, and a φ130mm steel pipe is pre-buried in the reserved anchor cable hole 111; when the roadbed is filled with soil, the The bottommost L-shaped prefabricated panel 103 and the excavation step line 1129 are sealed by the concrete sealing layer 107 of the same type as the L-shaped prefabricated panel 103, so that the permeable water in the embankment will not penetrate and soften the substrate. The subgrade fill is compacted in layers of 2m, and a layer of the geogrid 108 is laid every 2m from the bottom surface of the L-shaped prefabricated panel 103; the geogrid 108 should be a bidirectional welded polyester geogrid 108, in order to improve the overall stability and shear failure resistance of the roadbed, the longitudinal and transverse tensile strengths of the geogrid 108 are not less than 80kN/m; the L-shaped prefabricated panels 103 start from the second row, and the roadbed is filled with When the soil is filled to the top surface of the L-shaped prefabricated panel 103, drill holes to construct the anchor cable 110 on the L-shaped prefabricated panel 103 and complete the tension and locking of the anchor cable 110. The inclination angle of the anchor cable 110 should be 15°, the length of the anchor cable 110 is determined according to calculation. After the construction of the anchor cable 110 is completed, the earth will continue to be filled up until the elevation of the subgrade surface.

In the installation process, the slope roadbed 101 is first leveled and then compacted, and then the enlarged foundation 102 is set out on the slope roadbed 101, and the enlarged foundation 102 is opened according to the set-out position. Dig, then install the foundation bolts 109 in the enlarged foundation 102, bind the reinforcing bars of the enlarged foundation 102, and then pour concrete, after the enlarged foundation 102 is cast-in-place and reaches the initial setting, pour the enlarged foundation 102. The base protruding block 106, and then the bottom of the prefabricated L-shaped prefabricated panel 103 is installed on the enlarged base 102, and the front end of the L-shaped prefabricated panel 103 is in contact with the enlarged base protruding block 106. fixed, the rear end of the L-shaped prefabricated panel 103 is closed by the concrete sealing layer 107, the L-shaped prefabricated panel 103 is overlapped and fixed, and then the L-shaped prefabricated panel 103 is filled with the roadbed fill until reaching the The elevation of the pavement subgrade, so that the bridge can be stably installed at the subgrade of the steep slope, which makes the construction of the steep slope bridge more convenient.

The second embodiment of the present application is:

Referring to FIGS. 3 to 8 , on the basis of the first embodiment, the expansion base 102 of this embodiment has an expansion joint 202 , and the expansion joint 202 is arranged on the expansion base 102 near the L-shaped prefabricated panel On one side of 103, the number of the expansion joints 202 is multiple, and the multiple expansion joints 202 are arranged in parallel and spaced apart. The enlarged foundation protruding block 106 has a water drain hole 203 , and the water drain hole 203 penetrates the enlarged foundation protruding block 106 in a direction toward the L-shaped prefabricated panel 103 . The reinforcement structure further includes an anti-filter layer 201 , the anti-filter layer 201 is disposed on the L-shaped prefabricated panel 103 and is located on the side of the L-shaped prefabricated panel 103 close to the embankment filling 105 .

An expansion joint 202 is arranged on the enlarged foundation 102 every 15m along the line direction. The expansion joint 202 is cut with a cutting wheel, and the cross section is linearly distributed, so that the enlarged foundation 102 is heated and cooled externally. Reduce the influence of the expansion foundation 102 on the structure by thermal expansion and cold contraction; the expansion foundation protruding block 106 is provided with the drainage hole 203, the drainage slope of the drainage hole 203 is 4%, and the pre-buried φ= A 100mm PVC plastic drainage pipe is inserted; the reverse filter layer 201 is arranged behind the L-shaped prefabricated panel 103 to ensure that the occurrence of piping and flowing soil is prevented when the seepage water is discharged. is 0.3m. After the anti-filtration layer 201 is set, the roadbed filling can be carried out, which can enhance the impermeability of the roadbed.

What has been disclosed above is only a preferred embodiment of the present invention, of course, it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand that all or part of the process of realizing the above-mentioned embodiment can be implemented according to the present invention. The equivalent changes made by the claims of the utility model still belong to the scope covered by the utility model.

Claims (7)

1. A steep slope roadbed structure convenient for prefabrication and installation comprises a slope roadbed and is characterized in that,

the structure also comprises a reinforcing structure;

the reinforced structure is including enlarging basis, the prefabricated panel of L type, anchor subassembly and embankment and filling soil, enlarge basic fixed mounting on the slope road bed, and be located one side of slope road bed, the prefabricated panel fixed mounting of L type is in on the enlargement basis, the quantity of the prefabricated panel of L type is a plurality of, and is a plurality of the prefabricated panel of L type overlaps in proper order, every it has to fill on the prefabricated panel of L type the embankment is filled soil, the anchor subassembly is fixed respectively enlarge the basis with the prefabricated panel of L type.

2. A steep hill subgrade structure facilitating prefabrication and installation according to claim 1,

the reinforced structure further comprises an expanded foundation protruding stop block, wherein the expanded foundation protruding stop block is fixedly installed on the expanded foundation, fixedly connected with the L-shaped prefabricated panel and located on one side, close to the L-shaped prefabricated panel, of the expanded foundation.

3. A steep hill subgrade structure facilitating prefabrication and installation according to claim 1,

the reinforced structure further comprises a concrete sealing layer, wherein the concrete sealing layer is arranged between the enlarged foundation and the L-shaped prefabricated panel and fixedly connected with the enlarged foundation and the L-shaped prefabricated panel respectively.

4. A steep hill subgrade structure facilitating prefabrication and installation according to claim 1,

the reinforced structure further comprises an inverted filter layer, wherein the inverted filter layer is arranged on the L-shaped prefabricated panel and is positioned on one side, close to the embankment filled soil, of the L-shaped prefabricated panel.

5. A steep hill subgrade structure facilitating prefabrication and installation according to claim 1,

the reinforced structure further comprises a geogrid, and the geogrid is arranged in the embankment filling soil.

6. A steep hill subgrade structure facilitating prefabrication and installation according to claim 1,

the expansion foundation is provided with expansion joints, the expansion joints are arranged on one side, close to the L-shaped prefabricated panel, of the expansion foundation, the number of the expansion joints is multiple, and the expansion joints are arranged at intervals in parallel.

7. A steep hill subgrade structure facilitating prefabrication and installation according to claim 2,

the enlarged base protruding stop block is provided with a water drainage hole, and the water drainage hole penetrates through the enlarged base protruding stop block towards the direction of the L-shaped prefabricated panel.

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