CN209990501U

CN209990501U - Drainage blind pipe device suitable for collapsible loess tunnel

Info

Publication number: CN209990501U
Application number: CN201920321921.6U
Authority: CN
Inventors: 王亮; 李炎; 王强; 袁乾龙; 张彦龙; 曾佑理; 蒋鑫; 满国芳; 段魁
Original assignee: China Construction Second Engineering Bureau Co Ltd
Current assignee: China Construction Second Engineering Bureau Co Ltd
Priority date: 2019-03-13
Filing date: 2019-03-13
Publication date: 2020-01-24
Anticipated expiration: 2029-03-13

Abstract

The utility model provides a drainage blind pipe device that is adapted to collapsible loess tunnel. The drainage blind pipe device comprises an annular blind pipe and a longitudinal blind pipe, wherein the annular blind pipe is arranged between a primary support and a secondary lining of the tunnel and is led to a drainage hole of a side ditch of the tunnel; the longitudinal blind pipe is provided with a plurality of sections along the bottoms of side walls on two sides of the tunnel, two ends of each section are introduced into the side ditches of the tunnel, the longitudinal blind pipe also comprises a plurality of transverse drain pipes, the transverse drain pipes extend along the width direction of the tunnel at the bottom of the tunnel, and two ends of each transverse drain pipe are introduced into the side ditches of the tunnel; the annular blind pipe and the longitudinal blind pipe are fixed with reinforcing steel bars supported by the tunnel through a fixing assembly. Compared with the prior art, the utility model provides a drainage blind pipe device simple process, construction convenience, the installation is easy, has improved the drainage effect in the hole in collapsible loess tunnel greatly and has obtained improving, has guaranteed the stability of country rock, has improved tunnel construction's security.

Description

Drainage blind pipe device suitable for collapsible loess tunnel

Technical Field

The utility model belongs to the technical field of the tunnel drainage technique and specifically relates to a drainage blind pipe device who is adapted to collapsible loess tunnel is related to.

Background

The collapsible loess refers to soil which is subjected to significant additional deformation due to structural damage of the soil after immersion under the action of self-weight stress of an overlying soil layer or under the combined action of the self-weight stress and additional stress, and belongs to special soil. The bearing capacity of collapsible loess is sharply reduced under the action of water, the deformation is obviously increased, and great difficulty is caused to excavation and supporting of the tunnel. Therefore, in the construction process of the collapsible loess tunnel, water prevention and drainage construction in the tunnel is a necessary measure for ensuring construction quality, safety and construction progress.

Aiming at the special surrounding rocks such as collapsible loess, accumulated water in the tunnel needs to be drained in time, but in the prior art, a perfect drainage process is not provided, a drainage method of a common soil layer is adopted usually, the drainage effect is poor, and great potential safety hazards are brought to loess tunnel construction.

Therefore, it is required to provide a drainage blind pipe apparatus adapted to a collapsible loess tunnel to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an effectual drainage blind pipe device that is adapted to collapsible loess tunnel of drainage.

The technical scheme of the utility model is that: the drainage blind pipe device suitable for the collapsible loess tunnel comprises an annular blind pipe and a longitudinal blind pipe, wherein the annular blind pipe is arranged between a primary support and a secondary lining of the tunnel and is led to a drain hole of a side ditch of the tunnel; the longitudinal blind pipe is provided with a plurality of sections along the bottoms of side walls on two sides of the tunnel, two ends of each section are introduced into the side ditches of the tunnel, the longitudinal blind pipe also comprises a plurality of transverse drain pipes, the transverse drain pipes extend along the width direction of the tunnel at the bottom of the tunnel, and two ends of each transverse drain pipe are introduced into the side ditches of the tunnel; the annular blind pipe and the longitudinal blind pipe are fixed with reinforcing steel bars supported by the tunnel through a fixing assembly.

Among the above-mentioned scheme, compare in prior art like patent number CN203394584U, be provided with a plurality of horizontal drain pipes in the tunnel bottom, can make the drainage function in tunnel more comprehensive, drainage effect is better.

In addition, adopt fixed subassembly will the reinforcing bar that the hoop blind pipe and vertical blind pipe and the tunnel that closes on were strutted is fixed, compares in prior art and adopts the cement nail anchor to spout the technical scheme on the floor as in patent No. CN203394584U, and this scheme maneuverability is stronger, and easy operation and fixed effectual.

Preferably, the fixing assembly comprises a connecting rib and a plurality of fixing rings arranged on the connecting rib, the annular blind pipe or the longitudinal blind pipe is sleeved in the fixing rings, and the connecting rib is fixed with a steel bar supported by the tunnel.

Preferably, the connecting rib is a steel bar with the diameter of 16mm, and the fixing ring is a circular structure which is formed by bending the steel bar with the diameter of 8mm and has the inner diameter of 100 mm.

Preferably, the length of the connecting rib is 350 mm.

Preferably, the transverse drain pipe is a single-wall perforated corrugated pipe with the diameter of 100 mm.

Preferably, the length of each segment of the longitudinal blind pipe is 8-12 m, and the height of the secondary lining exposed at the bending part of the longitudinal blind pipe is 45-50 mm.

Preferably, the plurality of transverse drain pipes are spaced apart by 5 m.

Compared with the prior art, the beneficial effects of the utility model are that: the method has the advantages of simple process, convenient construction and easy installation, greatly improves the drainage effect in the cave of the collapsible loess tunnel, ensures the stability of surrounding rocks and improves the safety of tunnel construction.

Drawings

Fig. 1 is a schematic view of the installation cross section of the drainage blind pipe device adapted to the collapsible loess tunnel provided by the present invention;

fig. 2 is a schematic view of the installation of the fixing component in the drainage blind pipe adapted to the collapsible loess tunnel provided by the present invention;

fig. 3 is a schematic perspective view of a fixing component in a drainage blind pipe adapted to a collapsible loess tunnel according to the present invention;

fig. 4 is the utility model provides a fixed subassembly in the drainage blind pipe in collapsible loess tunnel looks sideways at the schematic diagram.

In the attached drawing, 1-annular blind pipe, 2-longitudinal blind pipe, 3-transverse drainage pipe, 4-primary support, 5-secondary lining, 6-fixing component, 61-connecting rib and 62-fixing ring.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" used herein refer to the directions of the drawings, and do not limit the structure of the drawings.

As shown in figure 1, the utility model provides a drainage blind pipe device that is adapted to collapsible loess tunnel includes hoop blind pipe 1, vertical blind pipe 2 and transverse drain pipe 3, hoop blind pipe 2 sets up between tunnel preliminary bracing 4 and secondary lining 5, introduces tunnel side ditch outlet department. The longitudinal blind pipe 2 is provided with a plurality of subsections along the bottom of the side walls at the two sides of the tunnel, and the two ends of each subsection are introduced into the side ditches of the tunnel. The structure, the arrangement mode and the construction process of the annular blind pipe 1 and the longitudinal blind pipe 2 are the same as those of the prior patent technology CN 203394584U.

The transverse drain pipes 3 extend in the width direction of the tunnel at the bottom of the tunnel, and both ends thereof are introduced into the tunnel side channels. The number of the secondary lining is multiple, the period distance is determined according to the construction length of the secondary lining, and the distance is 5m in the embodiment. The transverse drain pipe 3 is a phi 100mm single-wall perforated corrugated pipe, and a high-density polyethylene corrugated pipe can also be adopted.

The height h of the secondary lining exposed at the bending part of the longitudinal blind pipe 2 is 45-50 mm. In the embodiment, the length of the segment of the longitudinal blind pipe 2 is 8-12 m.

As shown in fig. 2 to 4, the circumferential blind pipe 1 and the longitudinal blind pipe 2 are both fixed with the reinforcing steel bars of the tunnel support through a fixing component 6.

The fixing assembly 6 comprises a connecting rib 61 and a fixing ring 62, wherein the connecting rib 61 is a steel bar with the diameter of 16mm, and the length of the connecting rib is 350 mm. The fixing ring 62 is a circular structure which is formed by bending a steel bar with the diameter of 8mm and has the inner diameter of 100 mm. The number of the fixing rings 62 is four, the fixing rings are arranged at intervals along the length direction of the connecting ribs 61, and the fixing rings 62 are fixed with the connecting ribs 61 in a welding mode.

When the fixing assembly 6 is installed, the annular blind pipe 1 and the longitudinal blind pipe 2 are firstly penetrated into the fixing ring 62, then the position of the fixing assembly 6 is determined by the amount of the ruler, and finally the connecting rib 61 is welded on the reinforcing steel bar of the adjacent tunnel support.

The fixing component 6 with the structure is particularly suitable for fixing the corners of the blind pipes, and can effectively prevent the corners from being blocked due to bending.

When the longitudinal blind pipe 2 is installed, the longitudinal gradient is required to be consistent with the line gradient, and each 1m is fixed once, so that the position of the blind pipe cannot be changed when concrete is poured.

The concentrated water outlet points are arranged in an encrypted manner according to the water quantity, holes are drilled in the concentrated water outlet points along the direction of a water source, then a single concentrated water diversion blind pipe is inserted into the holes, and the periphery of the blind pipe is plugged by rapid hardening mortar, so that underground water is led out from the pipes in a concentrated manner.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A drainage blind pipe device suitable for a collapsible loess tunnel comprises an annular blind pipe and a longitudinal blind pipe, wherein the annular blind pipe is arranged between a primary support and a secondary lining of the tunnel and is led to a drain hole of a tunnel side ditch; the longitudinal blind pipe is provided with a plurality of sections along the bottoms of side walls at two sides of the tunnel, and two ends of each section are introduced into the side ditches of the tunnel; the annular blind pipe and the longitudinal blind pipe are fixed with reinforcing steel bars supported by the tunnel through a fixing assembly.

2. The drainage blind pipe device that is adapted to collapsible loess tunnel of claim 1, characterized in that, fixed subassembly includes the splice bar and arranges and set up a plurality of solid fixed rings on the splice bar, the hoop blind pipe or vertical blind pipe cover are located in the solid fixed ring, the splice bar is fixed with the reinforcing bar that the tunnel was strutted.

3. The drainage blind pipe device adapted to the collapsible loess tunnel of claim 2, wherein the coupling ribs are phi 16mm reinforcing bars, and the fixing rings are circular structures having an inner diameter of 100mm formed by bending phi 8mm reinforcing bars.

4. The drainage blind pipe device adapted to the collapsible loess tunnel of claim 2 or 3, wherein the connecting ribs have a length of 350 mm.

5. The drainage blind pipe apparatus for collapsible loess tunnels according to claim 1, wherein the lateral drainage pipe is a phi 100mm single-wall perforated corrugated pipe.

6. The drainage blind pipe device for the collapsible loess tunnel according to claim 1, wherein the length of the segments of the longitudinal blind pipe is 8-12 m, and the height of the secondary lining exposed at the bent portion of the longitudinal blind pipe is 45-50 mm.

7. The drainage blind apparatus for collapsible loess tunnels according to claim 1, wherein a plurality of lateral drainage pipes are spaced at intervals of 5 m.