CN216198282U

CN216198282U - Underground passage inverted arch drainage structure

Info

Publication number: CN216198282U
Application number: CN202122539469.0U
Authority: CN
Inventors: 李家贤; 李磊; 王绪平; 刘中宝
Original assignee: China National Chemical Engineering No16 Construction Co ltd
Current assignee: China National Chemical Engineering No16 Construction Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-04-05
Anticipated expiration: 2031-10-21

Abstract

The utility model provides an underground passage invert drainage structure, include the country rock layer that outside-in set gradually, the protective layer is propped up to the initial stage, the drainage blanket, waterproof layer and secondary lining layer, be equipped with a plurality of wash ports on the preliminary bracing becomes, wash port intercommunication country rock layer and drainage blanket, the drainage blanket both ends are equipped with drainage channel, be equipped with the escape canal in the underground passage both sides, be equipped with central ditch in the underground passage bottom, drainage channel passes through many first drain pipes and escape canal intercommunication, the escape canal passes through many second drain pipes and central ditch intercommunication, be equipped with many pressure reducing pipes in the central ditch, the central ditch bottom surface is exposed to pressure reducing pipe upper end, pressure reducing pipe lower extreme intercommunication underground passage basement rock layer, fixedly connected with U-shaped support in the pressure reducing pipe, be equipped with the pipe in the U-shaped support, establish the guide arm in the pipe, guide arm upper end and the cover plate fixed connection who detains on the pressure reducing pipe. The utility model can smoothly and timely discharge the seepage water of the underground passage in time and prevent the seepage water of the construction joint.

Description

Underground passage inverted arch drainage structure

Technical Field

The utility model relates to an inverted arch drainage structure of an underground passage.

Background

After the underpass lining cutting was accomplished, when ponding behind a protective layer and the lining layer collected at the bottom of the tunnel and produced water pressure, inverted arch construction joint infiltration phenomenon very easily appeared, mainly adopt the pre-buried pipeline drainage to the infiltration at present, pipeline extrusion deformation and drainage are not smooth can appear in the work progress to this kind of drainage mode, and the water of drainage also can assemble formation water pressure in the underpass bottom simultaneously, lets the inverted arch seam infiltration phenomenon appear easily, makes the underpass have certain potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an inverted arch drainage structure of an underground passage, which can smoothly and timely drain seepage water of the underground passage in time and prevent seepage water of a construction joint.

In order to solve the problems, the technical scheme of the utility model is as follows:

the utility model provides an underground passage invert drainage structure, include the country rock layer that outside-in set gradually, the protective layer is propped up to the initial stage, the drainage blanket, waterproof layer and secondary lining layer, be equipped with a plurality of wash ports on the preliminary bracing becomes, wash port intercommunication country rock layer and drainage blanket, the drainage blanket both ends are equipped with drainage channel, be equipped with the escape canal in the underground passage both sides, be equipped with central ditch in the underground passage bottom, drainage channel passes through many first drain pipes and escape canal intercommunication, the escape canal passes through many second drain pipes and central ditch intercommunication, be equipped with many pressure reducing pipes in the central ditch, the central ditch bottom surface is exposed to pressure reducing pipe upper end, pressure reducing pipe lower extreme intercommunication underground passage basement rock layer, fixedly connected with U-shaped support in the pressure reducing pipe, be equipped with the pipe in the U-shaped support, establish the guide arm in the pipe, guide arm upper end and the cover plate fixed connection who detains on the pressure reducing pipe.

The utility model has the beneficial effects that: utilize drainage blanket, first drain pipe and second drain pipe can assemble the escape canal with water and discharge, and the drainage blanket adopts permeable concrete in addition, and pre-buried pipeline drainage compares, can not appear the drain pipe and block and the not smooth problem of drainage that arouses, sets up the pressure reducing pipe at central ditch simultaneously, utilizes the pressure reducing pipe to deliver to the escape canal with underground passage bottom water, alleviates underground passage water pressure, prevents the infiltration of invert construction joint.

Drawings

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

FIG. 1 is a schematic cross-sectional view of the present invention,

FIG. 2 is a schematic view of a partially enlarged structure of the present invention,

fig. 3 is a partially enlarged schematic view of the present invention.

In the figure: the water-saving drainage system comprises a surrounding rock stratum 1, an initial supporting layer 2, a drainage layer 3, a waterproof layer 4, a secondary lining layer 5, a drainage ditch 6, a drainage channel 7, a first drainage pipe 8, a second drainage pipe 9, a central ditch 10, a pressure reducing pipe 11, a guide rod 12, a U-shaped support 13, a cover plate 14, a guide pipe 16, a U-shaped groove 17, a connecting pipe 18 and a balancing weight 15.

Detailed Description

As shown in fig. 1 to 3, an inverted arch drainage structure for underground passage comprises an enclosed rock layer 1, an initial supporting layer 2, a drainage layer 3, a waterproof layer 4 and a secondary lining layer 5 which are arranged in sequence from outside to inside, after the surface of the underground passage and the rock surface are cleaned, a steel wire protective net is anchored on the surface of the underground passage to be used as the initial supporting layer 2, then permeable concrete is sprayed on the initial supporting layer 2 to be used as the drainage layer 3, wherein the coarse aggregate in the permeable concrete is porous light aggregate, the structure can achieve good drainage effect, after the permeable concrete is solidified, a layer of impermeable concrete is sprayed on the drainage layer 3 to be used as the waterproof layer 4, then the secondary lining concrete is arranged on the waterproof layer 4, drainage passages 7 are arranged at two ends of the drainage layer 3, drainage ditches 6 are arranged at two sides of the underground passage, a central ditch 10 is arranged at the bottom of the underground passage, the drainage passages 7 are communicated with the drainage ditches 6 through a plurality of first drainage pipes 8, the drainage ditch 6 is communicated with a central ditch 10 through a plurality of second drainage pipes 9, a plurality of pressure reducing pipes 11 are arranged in the central ditch 10, the upper ends of the pressure reducing pipes 11 are exposed out of the bottom surface of the central ditch 10, the lower ends of the pressure reducing pipes 11 are communicated with an underground passage basement layer, U-shaped supports 13 are fixedly connected in the pressure reducing pipes 11, the U-shaped supports 13 are of U-shaped structures formed by bending stainless steel sheets, the U-shaped supports 13 are fixed in the pressure reducing pipes 11 through self-tapping screws, after the central holes of the U-shaped supports 13 are drilled, stainless steel pipes are welded in the drilled holes to be used as guide pipes 16, guide rods 12 are arranged in the guide pipes 16, the upper ends of the guide rods 12 are fixedly connected with plastic cover plates 14 buckled on the pressure reducing pipes 11, the cover plates 14 form a one-way drainage structure on the pressure reducing pipes 11, the cover plates 14 can be buckled on the pressure reducing pipes 11 due to dead weight in a normal state, when the water pressure on the back surface at the bottom of the underground passage rises, water enters the pressure reducing pipes 11 and enters the central ditch 10 to be drained, and simultaneously, the water in the central ditch 10 can be prevented from flowing backwards to the bottom of the underground passage.

A U-shaped groove 17 made of PVC is arranged in the drainage channel 7, one side of the U-shaped groove 17 is connected with a plurality of connecting pipes 18, each first drainage pipe 8 is communicated with each connecting pipe 18, the U-shaped groove 17 is placed at the position of the drainage channel 7 before the drainage layer 3 is sprayed to serve as water, water underflow is prevented, and meanwhile the first drainage pipe 8 is blocked. A weight 15 is fixedly connected to the cover plate 14. Increasing the one-way effect of cover sheet 14.

Claims

1. The utility model provides an underground passage invert drainage structure, include country rock layer (1) that outside-in set gradually, initial stage support layer (2), drainage blanket (3), waterproof layer (4) and secondary lining layer (5), drainage blanket (3) both ends are equipped with drainage channel (7), be equipped with escape canal (6) in the underground passage both sides, be equipped with central ditch (10) in the underground passage bottom, drainage channel (7) are through many first drain pipe (8) and escape canal (6) intercommunication, escape canal (6) are through many second drain pipe (9) and central ditch (10) intercommunication, its characterized in that: a plurality of pressure reducing pipes (11) are arranged in the central ditch (10), the upper ends of the pressure reducing pipes (11) are exposed out of the bottom surface of the central ditch (10), the lower ends of the pressure reducing pipes (11) are communicated with an underground passage basement stratum, a U-shaped support (13) is fixedly connected in the pressure reducing pipes (11), a guide pipe (16) is arranged in the U-shaped support (13), a guide rod (12) is arranged in the guide pipe (16), and the upper end of the guide rod (12) is fixedly connected with a cover plate (14) buckled on the pressure reducing pipes (11).

2. An inverted arch drainage structure for underground passages according to claim 1, wherein: the drainage layer (3) is pervious concrete, and porous lightweight aggregate is selected as aggregate in the pervious concrete.

3. An inverted arch drainage structure for underground passages according to claim 1, wherein: a U-shaped groove (17) is arranged in the drainage channel (7), one side of the U-shaped groove (17) is connected with a plurality of connecting pipes (18), and each first drainage pipe (8) is communicated with each connecting pipe (18).

4. An inverted arch drainage structure for underground passages according to claim 1, wherein: a balancing weight (15) is fixedly connected on the cover plate (14).