CN211666718U

CN211666718U - Be used for effective precipitation system of subway shield end

Info

Publication number: CN211666718U
Application number: CN201921886370.4U
Authority: CN
Inventors: 金亚伟
Original assignee: Xintai Geotextile Material Co ltd
Current assignee: Xintai Geotextile Material Co ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-10-13
Anticipated expiration: 2029-11-05

Abstract

The utility model provides a system and a method for subway shield end effective precipitation, wherein a vertical shaft is arranged on the ground, one side wall of the vertical shaft is a concrete wall, a shield end face is arranged on the concrete wall, a plurality of counter bores are arranged outside the area of the shield end face on the side wall of the concrete wall, a water filtering rod is arranged in the counter bore, and the water filtering rod is connected with a vacuum prepressing tumbler type water collecting device; the utility model also provides a method that is used for effective precipitation of subway shield end, the subaerial shield of top at concrete wall rear side constructs the machine advancing direction's of machine outside the region and sets up a plurality of No. two counter bores, is equipped with the drainage stick in No. two counter bores, and the drainage stick links to each other with vacuum pre-compaction with tumbler formula water-collecting device, pump in proper order. The utility model discloses reduced the pressure of concrete wall rear side, effectively avoided the damage of shield structure machine, reduced the risk of mud spun behind the concrete wall, the utility model discloses the filter rod in well No. two counter bores sets up the inner tube in the filter rod, from inner tube bottom suction filtration for the drainage position of filter rod is lower.

Description

Be used for effective precipitation system of subway shield end

Technical Field

The utility model belongs to soil layer tunnel shield field among the civil engineering especially relates to a be used for effective precipitation system in subway shield end and method.

Background

With the rapid development of the subway industry in China, the adoption of the shield method has increased day by day, and in the shield method subway construction, when a shield machine directly shields a concrete wall in a vertical shaft, the shield machine can be damaged due to overlarge pressure at the rear side of the concrete wall, and a large amount of mud is flushed out to cause safety accidents; a method for reducing the rear side pressure of a concrete wall needs to be found.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: an object of the utility model is to provide a be used for effective precipitation system of subway shield end and setting method to prior art's not enough.

The utility model discloses an innovation point lies in can effectively reducing the pressure of concrete wall rear side, risk when reducing shield machine shield.

The technical scheme is as follows: a system for effectively dewatering an end of a subway shield is characterized in that a vertical shaft is arranged on the ground, one side wall of the vertical shaft is a concrete wall, a shield end face is arranged on the concrete wall, a plurality of counter bores are arranged outside the area of the shield end face on the side wall of the concrete wall, a water filtering rod is arranged in each counter bore, the water filtering rod is connected with a vacuum prepressing tumbler type water collecting device, the vacuum prepressing type water collecting device is arranged at the bottom end of the vertical shaft, the water filtering rod comprises a main pipe, a pointed cone connected to the bottom end of the main pipe, a transition joint connected to the top end of the main pipe and a branch pipe connected with the transition joint, the main pipe comprises a spiral steel wire framework and a filter screen cloth coated on the spiral steel wire framework, and the; the tumbler type water collecting device for vacuum preloading comprises a tank body buried underground below the ground, at least one submersible pump arranged at the bottom of the tank body, a liquid level controller arranged in the tank body and an automatic control electric box, wherein the tank body is a tumbler type cylinder body with a large upper end and a small lower end, a pipeline connection vacuum pump is arranged at the position, exposed out of the ground, of the upper end of the tank body, at least one water collecting port is formed in the wall of the middle part of the tank body, the submersible pump is connected with a water outlet pipe, the water outlet pipe extends out of the tank body, the liquid level controller is provided with at least one. The method comprises the following steps that a plurality of first counter bores are formed in the side wall of the concrete wall outside the area of the shield end face, water of mud on the rear side of the concrete wall is firstly pumped out after a water filtering rod is inserted, and pressure on the rear side of the concrete wall is reduced; the spiral steel wire framework of the water filtering rod continuously shakes in the operation process of the water filtering rod, so that the water filtering rod can be prevented from being blocked.

Furthermore, an inner pipe is inserted in the main pipe and is communicated with the branch pipe. On the one hand, the strength of the water filtering rod is increased, and on the other hand, the lower part of the inner pipe shakes during operation and the spiral steel wire framework impacts to prevent the water filtering rod from being blocked.

Furthermore, a plurality of water permeable holes are formed in the surface of the inner pipe. Water can be filtered out again through the water permeable holes.

Further, the first counter bores are arranged at four corners outside the shield end face area.

Further, the first counter bore is horizontally arranged. The drilling is convenient and the water filtration is easy.

Further, the aperture of the first counter bore is 32-40 mm.

For realizing the purpose of the utility model, the utility model adopts the following technical proposal: a system for effectively dewatering an end of a subway shield is characterized in that a vertical shaft is arranged on the ground, one side wall of the vertical shaft is a concrete wall, a shield end face is arranged on the concrete wall, a shield machine advances along the shield end face, a plurality of second counter bores are arranged outside the area of the advancing direction of the shield machine on the ground above the rear side of the concrete wall, water filtering rods are arranged in the second counter bores, and the water filtering rods are sequentially connected with a vacuum prepressing tumbler type water collecting device and a pump; the water filtering rod comprises a main pipe, a pointed conical head connected to the bottom end of the main pipe, a transition joint connected to the top end of the main pipe and a branch pipe connected with the transition joint, wherein the main pipe comprises a spiral steel wire framework and a filtering mesh cloth coated on the spiral steel wire framework, the branch pipe is a steel wire hose, an inner pipe is inserted in the main pipe, a gap is formed in the side wall of the bottom of the inner pipe, and the inner pipe is communicated with the branch pipe; the vacuum preloading tumbler type water collecting device is arranged at the bottom end of the vertical shaft; the pump is arranged on the ground. Set up a plurality of No. two counter bores through the above subaerial shield structure machine advancing direction's of concrete rear side outside the region, insert and establish the drainage stick after, take out the water of concrete wall rear side mud earlier, reduce the pressure of concrete wall rear side, set up the inner tube in the drainage stick, increase the intensity of drainage stick on the one hand, on the other hand makes water get into from the inner tube bottom, can filter the water drainage of concrete wall rear side bottom.

Further, the second counter bore is arranged perpendicular to the horizontal plane. The drilling is convenient and the water filtration is easy.

Further, the depth of the second counter bore is 18 m. The vacuum preloading is realized pumping water by the siphon principle above the tumbler type water collecting device, and the vacuum preloading is realized pumping water by the vacuumizing principle below the tumbler type water collecting device, so that the water filtering position is reduced to a position 18 meters away from the ground.

Further, the aperture of the second counter bore is 32-40 mm.

The utility model has the advantages that: compared with the prior art, the utility model has the advantages of as follows:

1. the utility model discloses well logical water rod and vacuum for pre-compaction tumbler formula water-collecting device filter out the water in the mud of concrete wall rear side in with the shaft, reduced the pressure of concrete wall rear side, effectively avoided the damage of shield structure machine, reduced behind the concrete wall mud spun risk.

2. The utility model discloses the filter rod in well No. two counter bores sets up the inner tube in the filter rod, from inner tube bottom suction filtration for the drainage level of filter rod is lower.

Drawings

FIG. 1 is a schematic view of example 1.

FIG. 2 is a schematic view of example 2.

Fig. 3 is a schematic structural view of the water filter rod in example 1.

Fig. 4 is a schematic structural view of a water filter rod in example 2.

Fig. 5 is a schematic structural view of a tumbler type water collecting device for vacuum preloading.

Detailed Description

Embodiment 1, as shown in fig. 1, 3, and 5, a method for effective precipitation of a metro shield end includes forming a vertical shaft 1 on the ground, forming a concrete wall 2 on a sidewall of the vertical shaft 1, forming a plurality of counter bores 3 outside a shield end face 8 region on the sidewall of the concrete wall 2, the counter bores 3 being preferably arranged at four corners outside the shield end face 8 region, the counter bores 3 being horizontally arranged, the counter bores having a bore diameter of 32-40mm, providing a water filtering rod 4 in the counter bores 3, connecting the water filtering rod 4 with a vacuum preloading tumbler type water collecting device 5, providing the vacuum preloading tumbler type water collecting device 5 at the bottom end of the vertical shaft 1, the water filtering rod 4 including a main pipe 4.1, a pointed cone 4.2 connected to the bottom end of the main pipe 4.1, a transition joint 4.3 connected to the top end of the main pipe 4.1, and a branch pipe 4.4 connected to the transition joint 4.3, wherein the main pipe 4.1 includes a spiral steel wire skeleton, a spiral steel wire, The filter screen cloth is coated on the spiral steel wire framework, the branch pipe is a steel wire hose, an inner pipe 4.5 is inserted in the main pipe 4.1, the inner pipe 4.5 is communicated with the branch pipe 4.4, and the surface of the inner pipe 4.5 is provided with a plurality of water permeable holes 4.5.1; the tumbler type water collecting device 5 for vacuum preloading comprises a tank body 5.1 buried underground, at least one submersible pump 5.2 arranged at the bottom of the tank body 5.1, a liquid level controller 5.3 arranged in the tank body 5.1 and a self-control electric box 5.4, wherein the tank body 5.1 is a tumbler type cylinder body with a large top and a small bottom, a pipeline connection vacuum pump 5.5 is arranged at the position, exposed out of the ground, of the upper end of the tank body 5.1, at least one water collecting port 5.7 is formed in the middle cylinder wall of the tank body 5.1, the submersible pump 5.7 is connected with a water outlet pipe 5.6, the water outlet pipe 5.6 is deep out of the tank body 5.1, the liquid level controller 5.3 is provided with at least one mercury float liquid.

Example 2: as shown in fig. 2, 4 and 5, the method for effectively dewatering the end of the subway shield comprises the steps of forming a vertical shaft 1 on the ground, wherein one side wall of the vertical shaft 1 is a concrete wall 2, the concrete wall 2 is provided with a shield end face 8, the shield machine advances along the shield end face 8, a plurality of second counter bores 6 are formed outside the area of the advancing direction of the shield machine on the ground above the rear side of the concrete wall 2, the second counter bores 6 are arranged perpendicular to the horizontal plane, the depth of the second counter bores 6 is 18m, and the aperture of the second counter bores 6 is 32-40 mm; be equipped with water filtering rod 4 in No. two counter bores 6, water filtering rod 4 in proper order with vacuum preloading with tumbler formula water-collecting device 5, the pump is 7 continuous mutually, vacuum preloading sets up in shaft 1 bottom with tumbler formula water-collecting device 5, pump 7 sets up subaerial, water filtering rod 4 is including being responsible for 4.1, connect in the pointed cone head 4.2 of being responsible for 4.1 bottom, connect in the transition joint 4.3 of being responsible for 4.1 top, the branch pipe 4.4 of being connected with transition joint 4.3, be responsible for 4.1 and include heliciform steel wire framework, the screen cloth of cladding on heliciform steel wire framework filters, branch pipe 4.4 is the steel wire hose, be responsible for 4.1 interpolation and be equipped with inner tube 4.5, be equipped with breach 4.5.2 on the bottom lateral wall of inner tube 4.5, inner tube 4.5 and branch pipe 4..

Claims

1. The utility model provides an effective precipitation system for subway shield end, its characterized in that sets up the shaft subaerial, and a shaft lateral wall is the concrete wall, is equipped with a shield and constructs the terminal surface on the concrete wall, sets up a plurality of counter bores outside the region of shield terminal surface on the lateral wall of concrete wall, is provided with the water filtering rod in the counter bore, and water filtering rod and vacuum preloading link to each other with tumbler formula water collecting device, tumbler formula water collecting device for the vacuum preloading sets up in the shaft bottom, the water filtering rod is responsible for, connect in the pointed cone head of being responsible for the bottom, connect in the transition joint who is responsible for the top, with the branch pipe of transition joint connection, is responsible for including heliciform steel wire framework, cladding filter screen cloth on heliciform steel wire framework, and the branch pipe is the flexible steel wire.

2. The subway shield end effective precipitation system according to claim 1, wherein the tumbler type water collection device for vacuum preloading comprises a tank body buried underground, at least one submersible pump arranged at the bottom of the tank body, a liquid level controller arranged in the tank body and a self-control electric box, the tank body is a tumbler type cylinder with a large top and a small bottom, a pipeline connection vacuum pump is arranged at the position, exposed out of the ground surface, of the upper end of the tank body, at least one water collection port is formed in the middle wall of the tank body, the submersible pump is connected with a water outlet pipe, the water outlet pipe extends out of the tank body, the liquid level controller is provided with at least one mercury float level switch, and the tank body is made of polypropylene.

3. The system of claim 1, wherein an inner pipe is inserted into the main pipe and is communicated with the branch pipe.

4. The system of claim 3, wherein the inner pipe is provided with a plurality of water permeable holes on the surface.

5. The system for effectively lowering the water level at the end of the subway shield according to claim 1, wherein the first counter bore is arranged at four corners outside the end face area of the shield.

6. The system for effectively lowering the water level at the end of the subway shield according to claim 1, wherein the first counter bore is horizontally arranged.

7. The system for effectively lowering the level of precipitation at the shield end of a subway according to claim 1, wherein the diameter of the first counter bore is 32-40 mm.