A modular tunnel structure suitable for emergency repairs in railway slope collapse disasters.

Abstract

This utility model discloses a prefabricated tunnel structure suitable for emergency repairs in railway slope collapse disasters. Conventional open-cut tunnel structures for preventing slope collapses theoretically cannot withstand lateral earth pressure from the slope and are unsuitable for sections with severe eccentric pressure. This utility model involves constructing a pile-slab retaining wall on the mountainside of the railway and an outer wall of the prefabricated tunnel structure on the backside. A top slab is installed on top of the pile-slab retaining wall and the outer wall. The pile-slab retaining wall includes bored anchor piles and retaining plates, with a capping beam at the top of the bored anchor piles. The outer wall includes bored cast-in-place piles, with a foundation beam at the top of the bored cast-in-place piles, and a concrete wall at the top of the foundation beam. This utility model can withstand lateral earth pressure, is suitable for sections with severe eccentric pressure, and solves the problem that conventional open-cut tunnels cannot withstand large loads on the mountainside.

Description

Technical Field

[0001] This utility model belongs to the field of geological disaster prevention and control technology, specifically relating to a prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters. Background Technology

[0002] A railway project located at a geological disaster site is situated along a river and beside a mountain. The mountainside is a loess slope with a height exceeding 50 meters. Under the influence of continuous heavy rainfall, the soil softened, its shear strength decreased, and the hydrostatic and hydrodynamic pressures increased. One day, the top of the natural slope collapsed, and the debris accumulated on the railway tracks, causing the northbound line to be suspended. The loess slope at this disaster site is over 50 meters high and is still prone to collapse under heavy rainfall conditions, requiring thorough remediation.

[0003] The location of this landslide hazard requires filling 6-10m of soil on the mountainside of the tunnel or shed. The lateral earth pressure is high and the bias pressure is severe. The conventional tunnel structure for preventing slope collapse in railways theoretically does not bear the lateral earth pressure on the mountainside and is not suitable for sections with severe bias pressure. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters. It can withstand lateral earth pressure, is suitable for sections with severe eccentric pressure, and solves the problem that conventional open tunnels cannot withstand large loads on the mountainside.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters, specifically:

[0007] A pile-slab retaining wall is installed on the mountainside of the railway, and an outer wall of a prefabricated tunnel structure is installed on the mountainside of the railway.

[0008] A top slab is installed on top of the pile-slab retaining wall and the outer wall;

[0009] The pile-slab retaining wall includes bored anchor piles and retaining plates, and a capping beam is provided on the top of the bored anchor piles;

[0010] The outer wall includes bored cast-in-place piles, with a foundation beam at the top of the bored cast-in-place piles, and a concrete wall at the top of the foundation beam.

[0011] Furthermore, a sand-pebble filter layer is provided on the back side of the retaining plate.

[0012] Furthermore, an EVA waterproof membrane is provided on the top plate.

[0013] Furthermore, a concrete waterproof layer is provided on the EVA waterproof board.

[0014] Furthermore, backfill soil and rocks are installed on the inner and upper sides of the prefabricated shed.

[0015] Furthermore, the EVA waterproofing membrane and concrete waterproofing layer are laid from the inside of the mountain to the outer wall of the shed.

[0016] Furthermore, the crown beam is provided with a tongue and groove joint on the side facing the railway, and the concrete wall is provided with a tongue and groove joint on the side facing the railway.

[0017] The beneficial effects of this utility model are:

[0018] 1) The prefabricated tunnel structure constructed by this utility model can withstand lateral earth pressure and is suitable for sections with severe eccentric pressure. It solves the problem that conventional open tunnel construction seriously affects the operation of existing railways, and at the same time solves the problem that conventional open tunnels cannot withstand large loads on the mountain side.

[0019] 2) This utility model uses cast-in-place reinforced concrete for small components used in railway operations, and prefabricates reinforced concrete off-site for large components used in railway operations. The prefabricated components are then hoisted and assembled, which improves construction efficiency. Attached Figure Description

[0020] Figure 1 This is a plan view of the assembled shed of this utility model;

[0021] Figure 2 This is a cross-sectional view of the present invention (AA).

[0022] Figure 3 This is a cross-sectional view of the present invention.

[0023] Figure 4 This is a CC cross-sectional view of the present invention;

[0024] In the diagram: 1-Drilled anchor pile, 2-Drilled cast-in-place pile, 3-Pile cap beam, 4-Cover beam, 5-Concrete wall, 6-Retaining plate, 7-Top plate, 8-Sand and gravel filter layer, 9-EVA waterproof membrane, 10-C20 concrete waterproof layer, 11-Backfill soil and rock. Detailed Implementation

[0025] The present invention will now be described in detail with reference to specific embodiments.

[0026] This utility model provides a prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters. It can withstand lateral earth pressure and is suitable for sections with severe eccentric pressure. It solves the problem that conventional open-cut tunnel construction seriously affects the operation of existing railways, and at the same time solves the problem that conventional open-cut tunnels cannot withstand large loads on the mountainside.

[0027] like Figure 1 , 2As shown in Figures 3 and 4, the prefabricated tunnel structure applicable to emergency rescue of railway slope collapse disasters is specifically as follows:

[0028] A pile-slab retaining wall is installed on the mountainside of the railway. The pile-slab retaining wall includes bored anchor piles 1 and retaining plates 6. A capping beam 4 is installed on the top of the bored anchor piles 1. A bagged sand and gravel filter layer 8 is installed on the back side of the retaining plate 6.

[0029] An external wall of a prefabricated tunnel structure is set on the back side of the railway. The external wall includes bored piles 2, a pile cap beam 3 is set on the top of the bored piles 2, and a C30 concrete wall 5 is set on the top of the pile cap beam 3. The bored piles 2 and the pile cap beam 3 provide a stable foundation for the concrete wall 5. The bored piles 2, the pile cap beam 3 and the concrete wall 5 are all made of reinforced concrete or cast-in-place concrete.

[0030] A top slab 7 is installed on top of the pile-slab retaining wall and the outer side wall; the top slab 7 serves as the roof of the prefabricated shed structure, with a width of generally 1 to 1.3 meters, and is prefabricated off-site with reinforced concrete, and then hoisted after prefabrication; the pile-slab retaining wall can withstand the soil pressure on the mountain side, and at the same time, the pile-slab retaining wall serves as the inner side wall of the prefabricated shed structure; the pile-slab retaining wall and the outer side wall provide support for the reinforced concrete top slab 7 of the prefabricated shed.

[0031] An EVA waterproof membrane 9 is installed on the top slab 7, and a 30cm thick C20 concrete waterproof layer 10 is installed on the EVA waterproof membrane 9. The EVA waterproof membrane and the concrete waterproof layer can prevent rainwater from seeping into the shed. Backfill soil and rocks 11 are installed on the inner and upper sides of the prefabricated shed. The EVA waterproof membrane 9 and the concrete waterproof layer 10 are laid from 0.5m inside the hillside to the outer wall of the shed.

[0032] The bored anchor pile 1 and the capping beam 4 are made of cast-in-place reinforced concrete, while the retaining plate 6 is made of precast reinforced concrete and is hoisted after prefabrication. The capping beam 4 and the concrete wall 5 are equipped with tongue and groove joints on the side facing the railway to facilitate the installation of the top plate 7.

[0033] The construction method of this utility model is as follows:

[0034] Step 1: Construct bored anchor pile 1 and bored cast-in-place pile 2;

[0035] Step 2: After the steel reinforcement cage of the foundation beam 3 is installed in place, erect the formwork and cast the foundation beam 3 in place;

[0036] Step 3: Erect formwork and cast in-situ concrete wall 5 to complete the construction of the outer wall of the prefabricated shed opening;

[0037] Step 4: Precast retaining wall 6 and top slab 7;

[0038] Step 5: Install retaining walls 6 in layers, simultaneously place sand and gravel filter layer 8 in layers, and simultaneously use small machinery to compact backfill soil and rock 11 in layers;

[0039] Step 6: After the retaining wall 6, sand and gravel filter layer 8, and backfill soil and rock 11 are constructed to the top surface of the retaining wall 6, the steel cage of the capping beam 4 is placed and the capping beam 4 is cast in place.

[0040] Step 7: Install the top panel 7 using cables or a crane;

[0041] Step 8: Use small machinery to compact the backfill soil and rock 11 to the top surface of the capping beam 4 in layers;

[0042] Step 9: Lay the EVA waterproof membrane 9;

[0043] Step 10: Cast-in-place C20 concrete waterproof layer 10;

[0044] Step 11: Fill and compact the backfill soil and rock in layers 11.

[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] The content of this utility model is not limited to the embodiments listed. Any equivalent modifications made by those skilled in the art to the technical solution of this utility model after reading this utility model specification shall be covered by the claims of this utility model.

Claims

1. A prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters, characterized in that: A pile-slab retaining wall is installed on the mountainside of the railway, and an outer wall of a prefabricated tunnel structure is installed on the mountainside of the railway. A top slab (7) is provided on the pile-slab retaining wall and the outer side wall. The pile-slab retaining wall includes bored anchor piles (1) and retaining plates (6), and a capping beam (4) is provided on the top of the bored anchor piles (1). The outer wall includes bored piles (2), and a pile cap beam (3) is provided on the top of the bored piles (2), and a concrete wall (5) is provided on the top of the pile cap beam (3).

2. The prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters according to claim 1, characterized in that: The back side of the retaining plate (6) is provided with a sand and gravel filter layer (8).

3. The prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters according to claim 2, characterized in that: An EVA waterproof membrane (9) is provided on the top plate (7).

4. The prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters according to claim 3, characterized in that: A concrete waterproof layer (10) is provided on the EVA waterproof board (9).

5. A prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters according to claim 4, characterized in that: Backfill soil and rocks are placed on the inner and upper sides of the prefabricated shed (11).

6. A prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters according to claim 5, characterized in that: The EVA waterproofing membrane (9) and the concrete waterproofing layer (10) are laid from the inside of the mountain to the outside wall of the cave.

7. A prefabricated tunnel structure suitable for emergency rescue of railway slope collapse disasters according to claim 6, characterized in that: The crown beam (4) has a tongue and groove joint on the side facing the railway, and the concrete wall (5) has a tongue and groove joint on the side facing the railway.

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