CN216950384U

CN216950384U - Supporting construction for improving loess tunnel arch springing bearing performance

Info

Publication number: CN216950384U
Application number: CN202220842329.2U
Authority: CN
Inventors: 唐小双
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2022-07-12
Anticipated expiration: 2032-04-13

Abstract

The utility model relates to the technical field of loess tunnels, in particular to a supporting structure for improving the bearing performance of loess tunnel arch springing, which comprises an inverted arch, wherein the upper surface of the inverted arch is provided with a primary support, the upper surface of the inverted arch is provided with a secondary lining, the secondary lining is arranged at the inner side of the primary support, the upper surface of the inverted arch is provided with backfill, the upper surface of the backfill is provided with a road surface, two ends of the upper surface of the road surface are symmetrically provided with pedestrians, the insides of two groups of the pedestrian roadbeds are provided with connecting steel pipes, the end parts of the two groups of the connecting steel pipes are arranged in the secondary lining, and the outer surfaces of the two groups of the connecting steel pipes are fixedly provided with five groups of cross steel pipes. The utility model can transversely fix the secondary lining by arranging the connecting steel pipes and can provide enough fixing effect by arranging the cross steel pipes, thereby improving the bearing capacity of arch feet at two ends of the secondary lining and preventing the secondary lining from being stressed to move to two sides.

Description

Supporting construction for improving loess tunnel arch springing bearing performance

Technical Field

The utility model relates to the technical field of loess tunnels, in particular to a supporting structure for improving the bearing performance of a loess tunnel arch springing.

Background

The tunnel is an engineering building buried in the ground, is a form of utilizing underground space by human beings, and is defined by that a cavity with a cross-sectional area larger than 2 square meters is built underground by any method according to the specified shape and size, and the tunnel can be divided into a traffic tunnel, a hydraulic tunnel, a municipal tunnel, a military tunnel and the like.

Loess tunnel business turn over the loess layer of mouth section lie in near basement rock handing-over for saturated loess, and country rock intensity is low, and is poor from steady ability, and the bearing capacity of loess tunnel hunch foot is relatively poor, causes the loess tunnel to take place apparent displacement easily to rainwater infiltration when rainy season causes soil erosion easily, reduces the stability in loess tunnel.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a supporting structure for improving the bearing capacity of a loess tunnel arch springing, and aims to solve the problem that the loess tunnel arch springing provided by the background art has poor bearing capacity.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an improve supporting construction of loess tunnel hunch foot bearing capacity, includes the invert, the upper surface of invert is provided with preliminary bracing, the upper surface of invert is provided with secondary lining, and secondary lining sets up in the preliminary bracing inboard, the upper surface of invert is provided with backfill, the upper surface of backfill is provided with the road surface, the both ends symmetry of road surface upper surface is provided with pedestrian's road bed, and is two sets of the inside of pedestrian's road bed all is provided with the connection steel pipe, and the tip of two sets of connection steel pipes all sets up in secondary lining, and is two sets of the fixed surface of connection steel pipe installs five sets of cross steel pipes, and three sets of cross steel pipes set up in secondary lining's inside to two sets of cross steel pipe settings are in pedestrian's road bed's inside.

It is obvious by above-mentioned scheme, pedestrian's road bed can provide the effect to secondary lining horizontal fixation with the setting of connecting the steel pipe to through the setting of cross steel pipe, can effectively promote the fixed effect of connecting the steel pipe in pedestrian's road bed and secondary lining, so can effectively prevent the purpose of secondary lining's both sides hunch foot to both sides displacement.

In the embodiment, a reserved deformation layer is arranged between the primary support and the secondary lining, and a waterproof layer is arranged on the outer surface of the secondary lining.

By the scheme, the deformation layer and the communication holes are reserved, rainwater can be prevented from permeating into the secondary lining, and water and soil loss caused by rainwater permeating into the secondary lining is prevented, so that the stability is influenced.

In this embodiment, the basin has all been seted up at the both ends of backfill upper surface, the intercommunicating pore has all been seted up to the both ends hunch foot inside of secondary lining, and two sets of intercommunicating pores all communicate and reserve deformation zone and basin.

According to the scheme, the rainwater can flow into the water tank under the action of gravity after entering the reserved deformation layer.

In this embodiment, two groups of first fixing steel rods are arranged downwards inside the two ends of the arch springing of the secondary lining, and the bottom ends of the two groups of first fixing steel rods extend to the inside of the inverted arch.

According to the scheme, the stability of the secondary lining can be further improved through the arrangement of the first fixed steel chisel.

In this embodiment, water pipes are disposed inside the two sets of communication holes, and rubber pads are bonded to the outer surfaces of the two sets of water pipes.

By the scheme, when rainwater can be prevented from passing through the communicating holes by the arrangement of the water pipes, the rainwater seeps into the inner walls of the communicating holes and enters the secondary lining, and the rubber pad has certain elasticity, so that the water pipes can be prevented from being broken and damaged when an earthquake occurs or the secondary lining vibrates.

In this embodiment, the inside of two sets of the pedestrian roadbed is provided with the second fixed drill steel, and the bottom of two sets of the second fixed drill steel passes through the road surface and extends into the backfill soil.

According to the scheme, the second fixed steel drill rods are arranged, so that the stability of the pedestrian roadbed can be improved when the secondary lining moves transversely to two sides.

Compared with the prior art, the utility model has the beneficial effects that:

1. the secondary lining can be transversely fixed by arranging the connecting steel pipes, and the cross steel pipes can provide enough fixing effect, so that the bearing capacity of arch feet at two ends of the secondary lining is improved, and the secondary lining is prevented from being forced to move to two sides;

2. in the case of long-time rain in rainy season, rainwater permeates into the reserved deformation layer and is discharged into the water tank through the water pipes on the two sides, and the waterproof layer is arranged to prevent the rainwater from permeating into the secondary lining, so that the rainwater can be prevented from permeating into the secondary lining to cause water and soil loss, and the stability of the secondary lining is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the structure A in FIG. 1 according to the present invention;

FIG. 3 is a schematic structural view of a connecting steel pipe according to the present invention;

fig. 4 is a schematic structural view of the water pipe of the present invention.

In the figure: 100. an inverted arch; 101. primary support; 102. secondary lining; 103. reserving a deformation layer; 104. a communicating hole; 105. a water pipe; 200. backfilling; 201. a pavement; 202. a water tank; 300. a pedestrian subgrade; 301. connecting the steel pipes; 302. a cross-shaped steel pipe; 400. a waterproof layer; 500. a first fixed drill steel; 600. and the second fixed steel chisel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, an embodiment of the present invention is shown:

a supporting structure for improving the bearing performance of loess tunnel arch springing comprises an inverted arch 100, wherein a primary support 101 is arranged on the upper surface of the inverted arch 100, a secondary lining 102 is arranged on the upper surface of the inverted arch 100, the secondary lining 102 is arranged on the inner side of the primary support 101, backfill 200 is arranged on the upper surface of the inverted arch 100, a road surface 201 is arranged on the upper surface of the backfill 200, pedestrian roadbeds 300 are symmetrically arranged at two ends of the upper surface of the road surface 201, connecting steel pipes 301 are arranged inside two groups of the pedestrian roadbeds 300, the end parts of the two groups of the connecting steel pipes 301 are arranged in the secondary support 102, five groups of cross steel pipes 302 are fixedly arranged on the outer surfaces of the two groups of the connecting steel pipes 301, the three groups of the cross steel pipes 302 are arranged inside the secondary support 102, and the two groups of the cross steel pipes 302 are arranged inside the pedestrian roadbeds 300;

specifically, a reserved deformation layer 103 is arranged between the primary support 101 and the secondary lining 102, and a waterproof layer 400 is arranged on the outer surface of the secondary lining 102;

specifically, both ends of the upper surface of the backfill soil 200 are provided with water grooves 202, both ends of the arch springing of the secondary lining 102 are provided with communicating holes 104, and the two groups of communicating holes 104 are communicated with the reserved deformation layer 103 and the water grooves 202;

specifically, two groups of first fixed steel brazes 500 are downwards arranged in the arch springing at the two ends of the secondary lining 102, and the bottom ends of the two groups of first fixed steel brazes 500 extend to the inside of the inverted arch 100;

specifically, water pipes 105 are arranged inside the two groups of communication holes 104, and rubber pads are bonded on the outer surfaces of the two groups of water pipes 105;

specifically, the second fixing steel rods 600 are arranged inside the two groups of pedestrian foundations 300, and the bottoms of the two groups of second fixing steel rods 600 penetrate through the road surface 201 and extend into the backfill soil 200.

The working principle is as follows: during construction, a foundation pit is dug in advance at the bottom, then the inverted arch 100 is poured in the foundation pit by adopting concrete, before the concrete is not dried, two groups of first fixed steel brazes 500 are respectively inserted into two ends of the upper surface of the inverted arch 100, then sand soil is backfilled on the upper surface of the inverted arch 100 to form backfill soil 200, water grooves 202 are arranged at two ends of the upper surface of the backfill soil 200, then asphalt is poured on the upper surface of the backfill soil 200 to form a pavement 201, second fixed steel brazes 600 are respectively inserted into two ends of the pavement 201 before the asphalt is dried, after the asphalt is dried, the pedestrian roadbed 300 is poured by using the concrete at two sides of the upper surface of the pavement 201, the second fixed steel brazes 600 are poured in the pavement, the firmness of the pedestrian roadbed 300 can be improved, at the same time of pouring of the pedestrian roadbed 300, connecting steel pipes 301 are transversely pre-buried in the pedestrian roadbed 300, then a primary support 101 is poured on the upper surface of the inverted arch 100, and after the primary support 101 is dried, a secondary lining 102 is poured on the upper surface of the inverted arch 100, and pouring the connecting steel pipe 301 inside, arranging a waterproof layer 400 on the outer surface of the secondary lining 102 in the process of pouring the secondary lining 102, reserving a space between the primary support 101 and the secondary lining 102 to form a reserved deformation layer 103, finally, arranging communication holes 104 in two side walls of the secondary lining 102, placing the water pipes 105 wrapped with rubber pads in the communication holes 104, after the engineering is finished, enabling vehicles to run on the upper surface of the road surface 201 in the same line, and enabling maintenance workers to pass on the upper surface of the roadbed 300.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides an improve supporting construction of loess tunnel hunch foot bearing capacity, includes inverted arch (100), its characterized in that: the upper surface of the inverted arch (100) is provided with a primary support (101), the upper surface of the inverted arch (100) is provided with a secondary lining (102), the secondary lining (102) is arranged at the inner side of the primary support (101), the upper surface of the inverted arch (100) is provided with backfill (200), the upper surface of the backfill (200) is provided with a pavement (201), two ends of the upper surface of the pavement (201) are symmetrically provided with pedestrian roadbeds (300), the insides of the two groups of pedestrian roadbeds (300) are provided with connecting steel pipes (301), the end parts of the two groups of connecting steel pipes (301) are arranged in the secondary lining (102), five groups of cross steel pipes (302) are fixedly arranged on the outer surfaces of the two groups of connecting steel pipes (301), and the three groups of cross steel pipes (302) are arranged inside the secondary lining (102), and two groups of cross steel pipes (302) are arranged inside the pedestrian roadbed (300).

2. The supporting structure for improving the bearing performance of the loess tunnel arch springing according to claim 1, wherein: a reserved deformation layer (103) is arranged between the primary support (101) and the secondary lining (102), and a waterproof layer (400) is arranged on the outer surface of the secondary lining (102).

3. The supporting structure for improving the bearing performance of the loess tunnel arch springing according to claim 1, wherein: troughs (202) are formed in two ends of the upper surface of the backfill soil (200), communicating holes (104) are formed in two end arch feet of the secondary lining (102), and the two groups of communicating holes (104) are communicated with the reserved deformation layer (103) and the troughs (202).

4. The supporting structure for improving the bearing performance of the loess tunnel arch springing according to claim 1, wherein: two groups of first fixed steel brazes (500) are downwards arranged in arch springing at two ends of the secondary lining (102), and the bottom ends of the two groups of first fixed steel brazes (500) extend to the inside of the inverted arch (100).

5. The supporting structure for improving the bearing performance of the loess tunnel arch springing according to claim 3, wherein: the water pipes (105) are arranged in the two groups of communication holes (104), and rubber pads are bonded on the outer surfaces of the two groups of water pipes (105).

6. The supporting structure for improving the bearing performance of the loess tunnel arch springing according to claim 1, wherein: and second fixed steel brazes (600) are arranged in the two groups of pedestrian roadbeds (300), and the bottoms of the two groups of second fixed steel brazes (600) penetrate through the road surface (201) and extend into the backfill soil (200).