CN210289836U - Advanced drainage structure of rich water tunnel construction - Google Patents
Advanced drainage structure of rich water tunnel construction Download PDFInfo
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- CN210289836U CN210289836U CN201921356662.7U CN201921356662U CN210289836U CN 210289836 U CN210289836 U CN 210289836U CN 201921356662 U CN201921356662 U CN 201921356662U CN 210289836 U CN210289836 U CN 210289836U
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Abstract
The utility model relates to the technical field of tunnel construction, in particular to an advanced drainage structure for water-rich tunnel construction; the technical scheme is as follows: the advanced drainage structure for the water-rich tunnel construction comprises an advanced drainage hole, wherein the advanced drainage hole extends into rock mass underground water along the tunneling direction of the tunnel and is positioned in a rock mass on the side edge of the tunnel; the drainage hole is positioned in a rock body on the side edge of the tunnel and communicated with the advanced drainage hole, and the drainage hole and the advanced drainage hole are sequentially arranged along the tunneling direction of the tunnel; and the inner side wall of the drain hole is provided with an impermeable layer, and the drain hole is used for draining water overflowing from the leading drain hole. The utility model can realize the advanced self-discharge of the groundwater of the water-rich rock mass in the tunnel construction, and ensure the construction progress and the construction safety; has the characteristics of simple structure, convenient construction, safety and reliability.
Description
Technical Field
The utility model relates to a tunnel construction technical field, concretely relates to advanced drainage structures of rich water tunnel construction.
Background
In recent years, the rapid development of tunnel engineering technology overcomes numerous engineering technical problems in the field of tunnel engineering such as water conservancy and hydropower, traffic, municipal engineering, underground engineering and the like, and achieves remarkable achievement. Tunnel construction needs to be provided with a tunnel in a rock body, and water inrush often occurs in tunnel construction of rock mass rich in a large amount of groundwater, so that a series of problems of engineering shutdown, construction period extension and the like are caused. At present, the advanced drain hole is mainly drilled on the tunnel face, so that water in rock-soil body flows out from the tunnel bottom plate. Although the effect of draining water can be achieved, the construction progress of the tunnel is affected. Meanwhile, water flow is difficult to control, and a drainage device is additionally arranged for ensuring normal operation and construction safety of construction.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems that the construction progress is influenced and the construction safety is difficult to ensure by the drainage in the existing water-rich tunnel construction; the utility model provides a leading drainage structures of rich water tunnel construction can realize the leading self-discharge of the groundwater of rich water rock mass in the tunnel construction, ensures construction progress and construction safety.
The utility model discloses a following technical scheme realizes:
the advanced drainage structure for the water-rich tunnel construction comprises an advanced drainage hole, wherein the advanced drainage hole extends into rock mass underground water along the tunneling direction of the tunnel and is positioned in a rock mass on the side edge of the tunnel; the drainage hole is positioned in a rock body on the side edge of the tunnel and communicated with the advanced drainage hole, and the drainage hole and the advanced drainage hole are sequentially arranged along the tunneling direction of the tunnel; and the inner side wall of the drain hole is provided with an impermeable layer, and the drain hole is used for draining water overflowing from the leading drain hole.
The utility model enables the underground water in the water-rich rock mass in front of the tunnel driving direction to seep out from the advanced drain hole and be discharged through the drain hole; because groundwater has certain pressure, consequently the utility model discloses can realize the groundwater in the rich water rock mass from discharging. And the underground water in the rock mass is discharged from the rock mass at one side of the tunnel, so that the construction in the tunnel is not disturbed. Simultaneously, the prevention of seepage water layer in the drainage hole can prevent that groundwater from oozing the rock mass of tunnel side, ensures tunnel construction safety.
Furthermore, a drain pipe is matched in the drain hole, the length of the drain pipe is larger than the depth of the drain hole, and therefore the drain hole is further prevented from being washed by underground water and the underground water is prevented from flowing out of rock masses around the drain hole.
Preferably, the drain pipe is connected with a flowmeter, so that the drainage flow of the underground water can be monitored in real time.
Preferably, the drain pipe is further connected with a pressure gauge and a switch valve, and the switch valve is located behind the pressure gauge. The discharge of controllably launching by the ooff valve is stifled, and the pressure gauge can real-time detection drainage intraductal water pressure, by water pressure and discharge with the accurate groundwater information who judges tunnel the place ahead.
Preferably, the end of the drain pipe is also provided with a water collecting container for storing the groundwater flowing out of the drain pipe.
Preferably, the water collecting container is connected with a water pumping device, so that the water flow can be accelerated to be discharged and can be conveniently discharged to a specified position.
Preferably, the inner diameter of the drain pipe is larger than the diameter of the advanced drain hole, so that the underground water is prevented from acting on the end faces of the drain pipe and the impermeable layer and entering between the drain hole and the impermeable layer.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the utility model is provided with a drain hole and an advanced drain hole in the rock mass at the side of the tunnel along the tunneling direction of the tunnel in sequence, and the inner side wall of the drain hole is provided with a water seepage prevention layer; the underground water in the water-rich rock mass in front of the tunneling direction of the tunnel seeps out of the advanced drain hole and is drained through the drain hole. Because groundwater has certain pressure, consequently the utility model discloses can realize the groundwater in the rich water rock mass from discharging. And the underground water in the rock mass is discharged from the rock mass at one side of the tunnel, so that the construction in the tunnel is not disturbed. Simultaneously, the prevention of seepage water layer in the drainage hole can prevent that groundwater from oozing the rock mass of tunnel side, ensures tunnel construction safety. Therefore the utility model discloses can avoid taking place to gush the safety risk and the loss of property that the gushing water brought when the face excavation, have simple structure, convenient construction, safe and reliable's characteristics.
2. The drainage pipe is provided with a flowmeter, a switch valve and a pressure gauge, and the underground water pressure of the water-rich rock mass can be acquired and monitored through the water pressure gauge under the condition that the switch valve is closed; and under the condition that the water pipe valve is opened, the underground water discharge flow of the water-rich rock mass can be obtained and monitored through the flowmeter. Therefore, the groundwater parameters such as groundwater pressure, water flow velocity and the like can be obtained so as to accurately judge the groundwater characteristics in the water-rich rock mass.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the plane a-a of fig. 1.
Reference numbers and corresponding part names in the drawings:
1-advanced drain hole, 2-drain hole, 3-impermeable layer, 4-drain pipe, 5-flowmeter, 6-pressure gauge, 7-switch valve, 8-water collecting container, 10-rock mass and 11-tunnel.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Examples
The utility model provides a water-rich tunnel construction advanced drainage structures, includes advanced wash port 1, advanced wash port 1 extends to rock mass 10 groundwater along the 11 tunnelling directions in the tunnel, just advanced wash port 1 is located the rock mass of 11 sides in the tunnel. The drainage hole 2 is further included, the drainage hole 1 is located in a rock body 10 on the side of the tunnel 11, and the drainage hole 2 is communicated with the advanced drainage hole 1. The drain hole 2 and the advanced drain hole 1 are sequentially arranged along the tunneling direction of the tunnel, that is, the advanced drain hole 1 is positioned in front of the drain hole 2 (taking the tunneling direction as the front). And the inner side wall of the drain hole 2 is provided with an impermeable layer 3, and the drain hole 2 is used for draining water overflowing from the leading drain hole 1 so as to prevent underground water from flowing into cracks of a rock body 10 from the drain hole 2 and influencing the normal construction and construction safety of a tunnel.
The utility model discloses can make the tunnel 11 tunnel dig in the groundwater in the rich water rock mass in direction the place ahead, ooze through wash port 2 by leading wash port 1 and discharge. Because groundwater has certain pressure, consequently the utility model discloses can realize the groundwater in the rich water rock mass from discharging. Furthermore, the groundwater in the rock mass is discharged from the rock mass 10 on the tunnel 11 side, so that the construction in the tunnel 11 is not disturbed. Meanwhile, the seepage-proof layer 3 in the drain hole 2 can prevent underground water from seeping out of the rock mass 10 on the side surface of the tunnel 11, so that the safety of tunnel construction is ensured.
Furthermore, a drain pipe 4 is fitted in the drain hole 2, that is, the drain hole 2 is used as a mounting hole for the drain pipe 4. Further preventing underground water from permeating into the rock body 10 from the drain hole 2 and preventing underground water from flowing out of the rock body 10 around the drain hole 2, and ensuring the safety of tunnel construction. The length of the drain pipe 4 is larger than the depth of the drain hole 2 so as to prevent underground water from washing the rock body 10.
Preferably, the drainage pipe 4 is connected with a flow meter 5, so as to monitor the drainage flow of the underground water in real time.
Preferably, the water discharge pipe 4 is further connected with a pressure gauge 6 and a switch valve 7, wherein the switch valve 7 is located behind the pressure gauge 6, so that after the switch valve 7 is closed, the pressure gauge 6 can still detect the groundwater pressure. Simultaneously by the row stifled of the controllable sewer of ooff valve 7, and pressure gauge 6 can the real-time detection drain pipe 4 in water pressure, consequently can accurately judge the groundwater information in tunnel 11 the place ahead by water pressure and discharge to timely taking counter-measure ensures constructor safety and property safety.
Preferably, the end of the drain pipe 4 is further provided with a water collecting container 8, such as a water collecting tank, etc., for storing the groundwater flowing out of the drain pipe 4. On one hand, the underground water can be temporarily stored to deposit silt in the underground water; on the other hand, the directional discharge of the underground water is convenient.
Preferably, the water collecting container 8 is connected with a pumping device, such as a siphon, a suction pump, etc., by which the discharge of groundwater can be accelerated and the flow of water can be easily discharged to a designated position.
Preferably, the inner diameter of the drain pipe 4 is larger than the diameter of the leading drain hole 1, so that the groundwater pressure is prevented from acting on the end faces of the drain pipe 4 and the impermeable layer 3, and the groundwater is prevented from entering between the drain hole 2 and the impermeable layer 3.
The aperture of the advanced drain hole 1 is determined according to the predicted groundwater quantity, and the depth is determined according to the depth of the main groundwater burial position of the water-rich rock mass; the hole diameter and the hole depth of the drain hole 2 are determined according to the hole diameter of the leading drain hole 1 and the outer diameter of the drain pipe 4. If the length of the water discharge pipe 4 is too long, a plurality of sections of pipes connected by screw threads can be adopted.
The utility model discloses a construction method:
before construction, detecting the underground water burying position of the water-rich rock mass;
if the underground water burying position is close to the outer side of the mountain body, a water drainage hole extending to the front end of the underground water burying position is directly formed (drilled) in the rock body on the side of the tunnel digging position from the outside of the mountain body along the tunnel digging direction;
for the condition that the underground water burying position of the rock mass is positioned at the middle section of the tunnel or the underground water burying position of the rock mass is far away from the tunnel portal, the tunneling is suspended when the tunnel is tunneled to the front end of the underground water burying position, and a branch hole (digging/drilling) is arranged at one side of the tunnel so as to conveniently build a drain hole and an advanced drain hole;
arranging a drain pipe in the drain hole, injecting anti-seepage cement mortar into a gap between the drain pipe and the drain hole to fix the drain pipe, and forming a compact anti-seepage layer on the inner side wall of the drain hole;
at the bottom end of the drainage pipe, an advanced drainage hole extending to the underground water burying position is formed (drilled) along the tunneling direction of the tunnel, at the moment, a large amount of drainage water is drained, and temporary plugging needs to be carried out at the opening of the drainage pipe;
a flow meter, a switch valve and a pressure gauge are arranged on the drain pipe;
the tail end of the drain pipe is provided with a water collecting container and is connected with a water pumping device.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The utility model provides a drainage structures in advance of rich water tunnel construction, includes advanced wash port (1), advanced wash port (1) extend to rock mass (10) groundwater along tunnel (11) tunnelling direction in, its characterized in that: the advanced drain hole (1) is positioned in a rock body (10) on the side of the tunnel (11);
the tunnel is characterized by further comprising drain holes (2), wherein the drain holes (2) are located in rock bodies (10) on the side of the tunnel (11), the drain holes (2) are communicated with the advanced drain holes (1), and the drain holes (2) and the advanced drain holes (1) are sequentially arranged along the tunneling direction of the tunnel (11);
the inner side wall of the drain hole (2) is provided with an impermeable layer (3), and the drain hole (2) is used for draining water overflowing from the leading drain hole (1).
2. The advanced drainage structure for water-rich tunnel construction of claim 1, wherein: a drain pipe (4) is matched in the drain hole (2), and the length of the drain pipe (4) is larger than the depth of the drain hole (2).
3. The advanced drainage structure for water-rich tunnel construction according to claim 2, wherein: the water discharge pipe (4) is connected with a flowmeter (5).
4. The advanced drainage structure for water-rich tunnel construction according to claim 3, wherein: the drain pipe (4) is further connected with a pressure gauge (6) and a switch valve (7), and the switch valve (7) is located behind the pressure gauge (6).
5. The advanced drainage structure for water-rich tunnel construction according to claim 4, wherein: the tail end of the drain pipe (4) is also provided with a water collecting container (8).
6. The advanced drainage structure for water-rich tunnel construction according to claim 5, wherein: the water collecting container (8) is connected with a water pumping device.
7. The advanced drainage structure for water-rich tunnel construction according to claim 2, wherein: the inner diameter of the drain pipe (4) is larger than the diameter of the advanced drain hole (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921356662.7U CN210289836U (en) | 2019-08-20 | 2019-08-20 | Advanced drainage structure of rich water tunnel construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921356662.7U CN210289836U (en) | 2019-08-20 | 2019-08-20 | Advanced drainage structure of rich water tunnel construction |
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| CN210289836U true CN210289836U (en) | 2020-04-10 |
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| CN201921356662.7U Active CN210289836U (en) | 2019-08-20 | 2019-08-20 | Advanced drainage structure of rich water tunnel construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344880A (en) * | 2019-08-20 | 2019-10-18 | 中国电建集团成都勘测设计研究院有限公司 | A kind of rich water tunnel construction advance water discharge structure and construction method |
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2019
- 2019-08-20 CN CN201921356662.7U patent/CN210289836U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344880A (en) * | 2019-08-20 | 2019-10-18 | 中国电建集团成都勘测设计研究院有限公司 | A kind of rich water tunnel construction advance water discharge structure and construction method |
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