CN219139133U

CN219139133U - Cleanable grit chamber located on tunnel side wall

Info

Publication number: CN219139133U
Application number: CN202320305036.5U
Authority: CN
Inventors: 周立; 苟德明; 杨洪; 吴铭放; 刘敏捷
Original assignee: Guizhou Transportation Planning Survey and Design Academe Co Ltd
Current assignee: Guizhou Transportation Planning Survey and Design Academe Co Ltd
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2023-06-06
Anticipated expiration: 2033-02-24

Abstract

The utility model discloses a cleanable grit chamber positioned on a tunnel side wall, which comprises a tunnel main hole lining structure, wherein a grit chamber structure is arranged at a water outlet point at the side part of the main hole lining structure, a water outlet is arranged at the high water level of the grit chamber structure, and the water outlet is connected with a main hole central drainage ditch through a transverse drainage pipe. The utility model has simple structure and high construction convenience, the sand sedimentation tank structure is arranged on the side wall of the tunnel, and the water discharged from the karst pipeline is subjected to sand sedimentation treatment, so that the water after sand sedimentation treatment is led into the main hole drainage system through the drain pipe, thereby avoiding the blockage failure of the main hole drainage system caused by sand and stone entering the main hole drainage system, improving the water treatment capacity of the karst tunnel and realizing continuous and smooth drainage.

Description

Cleanable grit chamber located on tunnel side wall

Technical Field

The utility model relates to a cleanable grit chamber positioned on a side wall of a tunnel, and belongs to the technical field of tunnel construction.

Background

The expressway tunnel is built in the karst region, and the karst pipeline is extremely strong in development uncertainty, so that the situation that the karst pipeline and a main tunnel of the tunnel are mutually intersected to cause mud bursting and water flushing of the tunnel in the construction process occurs frequently. The method for treating the karst pipeline in the construction process is various, but the main treatment scheme is mainly row, and the method for not blocking the karst pipeline and straightening the drainage channel is the main method. Karst pipelines often contain a large amount of sediment, the treatment of the sediment is of great importance, and improper sediment treatment can often cause serious consequences for the later operation of a tunnel. For the large tunnel with large water yield and sediment content in water, special structures such as a water drain hole, a U-shaped hole sand basin and the like are usually required to be arranged for treatment, and for the condition with large water yield and small sediment content, the treatment is usually only required to be carried out by a scheme of increasing a drainage section. However, the sediment content in water may change in the process of tunnel operation, and it is necessary to set up a grit chamber at the water outlet point of the karst pipeline. The karst pipeline water can be discharged into the main hole drainage system after precipitation treatment. Untreated karst water is discharged into the main hole drainage system, so that the main hole drainage system can be blocked and invalid, and the operation safety of the whole tunnel is further affected. The grit chamber also needs to be cleaned periodically in order to maintain a good working condition. Aiming at the problem of sand sedimentation treatment of the water outlet point of the tunnel karst pipeline, the research on the cleanable sand sedimentation tank positioned on the side wall of the tunnel has great practical significance.

Disclosure of Invention

In view of the above, the utility model aims to provide a cleanable grit chamber positioned on a tunnel side wall, which can overcome the defects of the prior art.

The utility model aims at realizing the following technical scheme:

the cleanable grit chamber comprises a tunnel main hole lining structure, wherein a grit chamber structure is arranged at a water outlet point at the side part of the main hole lining structure, a water outlet is arranged at the high water level of the grit chamber structure, and the water outlet is connected with a main hole central drainage ditch through a transverse drainage pipe.

The grit chamber structure comprises a transverse hole which is intersected with the side part of the lining structure of the main hole, wherein the top of the transverse hole is an arc lining structure, and the bottom of the transverse hole is a bottom plate structure with a transverse slope.

The width of the transverse hole is 5-6m, the height is 5-6m, and the depth of the hole is 10-15m.

The bottom plate structure is a stepped structure with a transverse slope, and the water outlet is arranged at the upper part of the stepped structure.

The step-shaped structure is arranged in two or more stages; the stepped structure is arranged obliquely downwards along the direction far away from the main hole to form a transverse slope, and the inclination rate of the transverse slope is at least 5%.

A water blocking block is arranged in the transverse hole and is close to one side of the water outlet point, and the water outlet is relatively arranged on one side far away from the water outlet point.

The top of the transverse hole is an arc lining structure which sequentially comprises a waterproof reinforced concrete layer, a waterproof layer, a steel frame layer and a reinforced mesh concrete layer from inside to outside.

The waterproof reinforced concrete layer is a C30 waterproof reinforced concrete lining, and the thickness of the waterproof reinforced concrete lining is at least 35cm; the steel frame layer is formed by splicing a plurality of I14I-beams, and the longitudinal distance between every two adjacent I-beams is 100-120cm; the reinforced mesh concrete layer comprises a reinforced mesh and C25 sprayed concrete, the thickness of the reinforced mesh is at least 20cm, the reinforced mesh is phi 8 reinforced mesh, and the specification of the reinforced mesh is 20 multiplied by 20cm.

The transverse drain pipes are two ∅ mmPE double-wall corrugated pipes.

Reinforced concrete with the thickness of more than 45cm is arranged at the intersection of the grit chamber structure and the main hole lining structure and is used for improving the structural strength of the intersection position; and the intersection is provided with an access door which is convenient to open and close.

Compared with the prior art, the cleanable grit chamber positioned on the side wall of the tunnel comprises a main tunnel lining structure of the tunnel, wherein a grit chamber structure is arranged at a water outlet point at the side part of the main tunnel lining structure, a water outlet is arranged at a high water level of the grit chamber structure, and the water outlet is connected with a central drainage ditch of the main tunnel through a transverse drainage pipe. According to the main hole drainage system, the sand setting tank structure is expanded and dug at the position of the karst hole water outlet point at the side part of the main hole lining structure, so that the karst pipeline water can be firstly discharged into the main hole central drainage ditch of the main hole drainage system after sand setting treatment in the sand setting tank structure, and mud water which is not subjected to sedimentation treatment is discharged into the main hole drainage system to cause blockage failure of the main hole drainage system. The sand setting tank structure adopts at least two stages of sand setting, a 5% longitudinal slope is arranged, and a water baffle is added in the sand setting tank structure to control the water flow direction of a water outlet point, so that karst water is fully precipitated, and the precipitation treatment effect is good; in order to ensure the structural strength of the intersection of the main hole lining structure and the grit chamber structure, reinforced concrete is adopted for reinforcing the intersection, so that the stability of the tunnel is ensured, and the precipitation function of karst water is realized.

The utility model has simple structure and high construction convenience, the sand settling pond is arranged on the side wall of the tunnel, reinforced concrete reinforcement treatment is carried out on the lining notch of the tunnel side wall, and the water discharged from the karst pipeline is settled while the tunnel is stable, so that the water after the sand settling treatment is led into the main hole drainage system through the drain pipe, thereby avoiding the blockage failure of the main hole drainage system caused by sand and stone entering the main hole drainage system, improving the water treatment capacity of the karst tunnel and realizing continuous and smooth drainage.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the intersection of the grit chamber structure and the main hole lining structure;

fig. 3 is a schematic sectional structure of the grit chamber structure.

Detailed Description

Hereinafter, preferred embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

As shown in figures 1-3, the cleanable grit chamber positioned on the side wall of a tunnel comprises a tunnel main hole lining structure 2, wherein a grit chamber structure 1 is arranged at a water outlet point on the side part of the main hole lining structure 2, a water outlet is arranged at the high water level of the grit chamber structure 1, and the water outlet is connected with a main hole central drainage ditch 4 through a transverse drainage pipe 3. Through setting up grit chamber structure 1 at karst cave play water point, carry out the sediment treatment with karst pipeline play water and carry out the back of sediment treatment and discharge into main hole center escape canal 4 of main hole drainage system through horizontal drain pipe 3, avoid not depositing the muddy water of handling and discharge into main hole drainage system, cause main hole drainage system to stop up inefficacy.

The grit chamber structure 1 comprises a transverse hole which is intersected with the side part of the main hole lining structure 2, wherein the top of the transverse hole is an arc lining structure 101, and the bottom of the transverse hole is a bottom plate structure 102 with a transverse slope.

The bottom plate structure 102 is a stepped structure with a transverse slope, and the water outlet is arranged at the upper part of the stepped structure. Setting up the horizontal slope and being convenient for collect karst pipeline play water, and setting up the stairstepping structure and being convenient for realize multistage sedimentation, sedimentation treatment effect is better.

The stepped structure is arranged in two or more stages.

The stepped structure is obliquely downwards arranged along the direction far away from the main hole to form a transverse slope, and the inclination rate of the transverse slope is at least 5%.

The water retaining block 103 is arranged on one side, close to the water outlet point, of the transverse hole, the water outlet is relatively arranged on one side, far away from the water outlet point, of the transverse hole, water flow interception and sedimentation are carried out through the water retaining block 103, and then water is discharged from the water outlet, so that a better sedimentation effect is achieved. The water stop 103 is a C20 concrete prefabricated member, and the height of the water stop is at least 80cm.

The transverse drain pipes 3 are two ∅ mmPE double-wall corrugated pipes, the drainage amount is large, and the installation convenience is high.

Reinforced concrete with the thickness of more than 45cm is arranged at the intersection of the grit chamber structure 1 and the main hole lining structure 2, so that the structural strength of the intersection is effectively improved; an access door convenient to open and close is arranged at the intersection, and is in a closed state at ordinary times, so that the safety is improved; during maintenance, an access door can be opened, and the sand setting pond is cleaned by entering the transverse hole.

The top of the transverse hole is provided with an arc lining structure 101 which sequentially comprises a waterproof reinforced concrete layer, a waterproof layer, a steel frame layer and a reinforced mesh concrete layer from inside to outside.

The elevation of the sand setting pavement is kept consistent with that of the main tunnel pavement of the tunnel, so that the sewage suction truck enters the transverse tunnel to clean the sand setting pond in the later operation process.

Specific construction steps

The utility model is further described below with reference to the accompanying drawings.

1) Determining the excavation position of the sand setting tank structure 1 at the water outlet position of the karst pipeline of the side wall of the main hole lining structure 2, excavating a gap of the sand setting tank for processing the 1 hole, and reinforcing the gap position by adopting 45cm thick reinforced concrete;

2) Constructing the grit chamber structure 1 by referring to a tunnel construction process, wherein the grit chamber structure 1 adopts two stages of sand deposition, a 5% longitudinal slope is arranged, and a water baffle 103 is arranged on one side, close to a water outlet point, of the grit chamber structure to control the water flow direction of the water outlet point so as to fully deposit karst water;

3) 2 transverse drain pipes 2 with the diameter of 500mm are buried in the intersection position of the sand setting tank structure 1 and the main hole, karst pipeline water which is subjected to two-stage precipitation is discharged into a main hole center drain ditch 4, and an inspection well is arranged at the main hole center drain ditch to facilitate maintenance.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variations and modification made to the above embodiment according to the technical matter of the present utility model without departing from the technical scope of the present utility model still fall within the scope of the technical scheme of the present utility model.

Claims

1. The utility model provides a but be located tunnel side wall clearance formula grit chamber, includes tunnel main hole lining structure (2), its characterized in that: the sand setting tank structure (1) is arranged at the water outlet point at the side part of the main hole lining structure (2), a water outlet is arranged at the high water level of the sand setting tank structure (1), and the water outlet is connected with the main hole central drainage ditch (4) through the transverse drainage pipe (3).

2. The cleanable grit chamber on a tunnel side wall of claim 1, wherein: the sand setting pool structure (1) comprises a transverse hole intersected with the side part of the main hole lining structure (2), the top of the transverse hole is an arc lining structure (101), and the bottom of the transverse hole is a bottom plate structure (102) with a transverse slope.

3. The cleanable grit chamber on a tunnel side wall of claim 2, wherein: the width of the transverse hole is 5-6m, the height is 5-6m, and the depth of the hole is 10-15m.

4. A cleanable grit chamber positioned on a tunnel side wall as in claim 3, wherein: the bottom plate structure (102) is of a stepped structure with a transverse slope, and the water outlet is arranged at the upper part of the stepped structure.

5. The cleanable grit chamber positioned on a tunnel side wall of claim 4, wherein: the stepped structure is arranged in two or more stages; the stepped structure is arranged obliquely downwards along the direction far away from the main hole to form a transverse slope, and the inclination rate of the transverse slope is at least 5%.

6. A cleanable grit chamber positioned on a tunnel side wall as in claim 3, wherein: a water blocking block (103) is arranged in the transverse hole and on one side close to the water outlet point, and the water outlet is oppositely arranged on one side far from the water outlet point.

7. A cleanable grit chamber positioned on a tunnel side wall as in claim 3, wherein: the top of the transverse hole is provided with an arc lining structure (101) which sequentially comprises a waterproof reinforced concrete layer, a waterproof layer, a steel frame layer and a reinforced mesh concrete layer from inside to outside.

8. The cleanable grit chamber positioned on a tunnel side wall of claim 7, wherein: the waterproof reinforced concrete layer is a C30 waterproof reinforced concrete lining, and the thickness of the waterproof reinforced concrete lining is at least 35cm; the steel frame layer is formed by splicing a plurality of I14I-beams, and the longitudinal distance between every two adjacent I-beams is 100-120cm; the reinforced mesh concrete layer comprises a reinforced mesh and C25 sprayed concrete, the thickness of the reinforced mesh is at least 20cm, the reinforced mesh is phi 8 reinforced mesh, and the specification of the reinforced mesh is 20 multiplied by 20cm.

9. The cleanable grit chamber on a tunnel side wall of claim 1, wherein: the transverse drain pipes (3) are two ∅ mmPE double-wall corrugated pipes.

10. The cleanable grit chamber on a tunnel side wall of any one of claims 1 to 9, wherein: the intersection of the grit chamber structure (1) and the main hole lining structure (2) is provided with reinforced concrete with the thickness of more than 45cm for improving the structural strength of the intersection position; and the intersection is provided with an access door which is convenient to open and close.