CN214577013U

CN214577013U - Mud circulation, sediment and thick liquid level control system under TBM mode

Info

Publication number: CN214577013U
Application number: CN202023260341.2U
Authority: CN
Inventors: 罗淑仪; 陈乔松; 黄承泽; 李世佳; 梁红兵; 祝思然
Original assignee: GUANGZHOU MASS TRANSIT ENGINEERING CONSULTANT CO LTD
Current assignee: GUANGZHOU MASS TRANSIT ENGINEERING CONSULTANT CO LTD
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-11-02
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses a mud circulation, slag discharge and slurry liquid level control system under a TBM mode, wherein one end of a slurry discharge pipeline is communicated with a soil cabin, and the other end of the slurry discharge pipeline is sequentially provided with a pipeline switch valve I and a pressure control valve; the slurry discharge pipeline is communicated with a fragment intercepting and separating box which is communicated with one end of a slurry guiding pipe II, and the other end of the slurry guiding pipe II is communicated with the soil cabin; the fragment intercepting and separating box is also communicated with one end of a slurry guiding pipe I, the other end of the slurry guiding pipe I is communicated with one end of a slurry guiding pipe III, and the other end of the slurry guiding pipe III is communicated with the soil cabin; a slurry leading pipe switch valve is arranged on the slurry leading pipe I; the lower part of the soil cabin is also communicated with a spiral slag extractor; and a pipeline switch valve II is arranged on the slurry guiding pipe II. The utility model discloses utilize mud circulation mode mud discharging and spiral slag extractor to arrange sediment simultaneously, both prevented the jam possibility of mud discharging pipe, improved thick liquid discharging efficiency again, satisfy the requirement of arranging the sediment fast under the high-speed tunnelling of TBM mode.

Description

Mud circulation, sediment and thick liquid level control system under TBM mode

Technical Field

The utility model relates to a shield constructs technical field, concretely relates to novel mud circulation, row's sediment and thick liquid level control system under TBM rapid tunnelling mode.

Background

For a double-mold or three-mold shield machine (TBM + muddy water, soil pressure + TBM, muddy water + soil pressure + TBM), if a common soil pressure or muddy water shield mode is adopted, the abrasion loss of a cutter is very large, the cutter needs to be frequently changed under pressure or changed under pressure, the risk is extremely high, the construction progress is seriously influenced, and the engineering efficiency is greatly reduced. In a TBM (full face hard rock tunnel boring machine) mode, a hob on a rotary cutter disc is used for extruding and shearing broken rocks, rock debris is picked up through bucket teeth on the rotary cutter disc, falls onto a main belt conveyor and is conveyed backwards, and then the rock debris is conveyed out of the tunnel through a traction slag car or a tunnel continuous belt conveyor. Although the TBM mode has the characteristics of rapidness, high quality, safety, economy and the like for a hard rock stratum, the average construction month speed is only 500m, and for a long tunnel, if the tunneling efficiency is to be improved on the premise of ensuring safety, the slag discharge amount is greatly increased. Therefore, the existing method only depends on the traditional screw machine, slag car or tunnel continuous belt conveyor to discharge slag, the slag discharge rate is slow, the requirement of the slag discharge amount cannot be met, and the TBM tunneling rate is restricted by the near slag discharge rate. On the premise of keeping the stability of an excavation surface, the improvement of the high-speed cutting and high-speed tunneling efficiency of the TBM cutter head is especially important, and the improvement of the slag feeding and discharging efficiency in the TBM mode is especially important.

In addition, in the current shield tunneling slag discharge, the utilization efficiency of the slurry is low, the slurry is often discharged with a small amount of slag soil, the slurry is wasted, and the slag discharge system is easily blocked during slag discharge.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mud circulation, arrange sediment and thick liquid level control system under TBM mode to the not enough of prior art.

In order to realize the technical purpose, the utility model adopts the following technical scheme:

the utility model provides a mud circulation, slag discharging and slurry liquid level control system under TBM mode, which comprises a fragment intercepting separation box, a slurry discharging pipeline, a slurry leading pipe I, a pipeline switch valve I, a pressure control valve, a slurry inlet pipeline, a slurry leading pipe II, a slurry leading pipe III, a slurry leading pipe switch valve and a pipeline switch valve II; the slurry inlet pipeline is communicated with a soil cabin of the shield tunneling machine; one end of the slurry discharge pipeline is communicated with the soil cabin, and the other end of the slurry discharge pipeline is sequentially provided with a pipeline switch valve I and a pressure control valve; the slurry discharge pipeline is communicated with a fragment intercepting and separating box, the fragment intercepting and separating box is communicated with one end of a second slurry guiding pipe, and the other end of the second slurry guiding pipe is communicated with the soil cabin; the fragment intercepting and separating box is also communicated with one end of a first slurry guiding pipe, the other end of the first slurry guiding pipe is communicated with one end of a third slurry guiding pipe, and the other end of the third slurry guiding pipe is communicated with the soil cabin; a slurry leading pipe switch valve is arranged on the first slurry leading pipe; the lower part of the soil cabin is also communicated with a spiral slag extractor; and a pipeline switch valve II is arranged on the slurry guiding pipe II.

Furthermore, in the system, the other end of the slurry guiding pipe III is respectively communicated with the plurality of shunt slurry guiding pipes, and all the shunt slurry guiding pipes are communicated with the middle part of the soil cabin.

Further, in the system, the slurry inlet pipeline is communicated with the lower part of the soil cabin of the shield tunneling machine.

Further, in the above system, one end of the slurry discharge pipeline is communicated with the lower part of the soil cabin.

Further, in the system, the other end of the slurry guide pipe II is communicated with the lower part of the soil cabin.

The beneficial effects of the utility model reside in that:

1. the utility model discloses in, under the TBM tunnelling mode, utilize mud circulation mode to tunnel, advance simultaneously that the thick liquid pipeline directly advances thick liquid from lower part position in the shield constructs the machine and get into the soil cabin mud thick liquid, roll the thick liquid from the bottom, improve the efficiency of slagging tap, abolish lower advancing, arrange the restriction of sediment speed to the high-speed of tunnelling of TBM mode.

2. Utilize the utility model discloses can have comparatively stable adjustment to the mud liquid level, mud thick liquid level keeps 1/3 to 1/2 departments of mud liquid level in the soil cabin.

3. The utility model discloses utilize mud circulation mode mud discharging and spiral slag extractor to arrange sediment simultaneously, both prevented the jam possibility of mud discharging pipe, improved thick liquid discharging efficiency again, satisfy the requirement of arranging the sediment fast under the high-speed tunnelling of TBM mode.

Drawings

Fig. 1 is a schematic structural diagram of a system in embodiment 1 of the present invention;

FIG. 2 is a schematic view of the slurry trend when the slurry level is lower than 1/3 in embodiment 2 of the present invention;

fig. 3 is a schematic diagram of the slurry trend when the slurry level is higher than 1/2 in embodiment 2 of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. It should be noted that the present embodiment is premised on the technical solution, and detailed description and specific implementation are given, but the scope of the present invention is not limited to the present embodiment.

Example 1

The embodiment provides a slurry circulation, slag discharge and slurry liquid level control system in a TBM mode, as shown in FIGS. 1 to 3, which comprises a fragment intercepting and separating box 6, a slurry discharge pipeline 7, a slurry guide pipe I8, a pipeline switch valve I9, a pressure control valve 10, a slurry inlet pipeline 11, a slurry guide pipe switch valve 16 and a pipeline switch valve II 17; the slurry inlet pipeline 11 is communicated with the lower part of the soil cabin 3 of the shield machine; one end of the slurry discharge pipeline 7 is communicated with the lower part of the soil cabin 3, and the other end of the slurry discharge pipeline is sequentially provided with a pipeline switch valve I9 and a pressure control valve 10; the slurry discharge pipeline 7 is communicated with a fragment intercepting and separating box 6, the fragment intercepting and separating box 6 is communicated with one end of a second slurry guiding pipe 14, and the other end of the second slurry guiding pipe 14 is communicated with the lower part of the soil cabin 3; the fragment intercepting and separating box 6 is also communicated with one end of a slurry guiding pipe I8, the other end of the slurry guiding pipe I8 is communicated with one end of a slurry guiding pipe III 15, a slurry guiding pipe switch valve 16 is arranged on the slurry guiding pipe I8, and the slurry guiding pipe switch valve 16 is in a normally closed state; the other end of the slurry guide pipe III 15 is communicated with the middle part of the soil cabin 3; the lower part of the soil cabin 3 is also communicated with a spiral slag extractor 12; and a second pipeline switch valve 17 is arranged on the second slurry guiding pipe 14.

Further, the other end of the slurry guiding pipe III 15 is respectively communicated with a plurality of shunt slurry guiding pipes 18, and all the shunt slurry guiding pipes 18 are communicated with the middle part of the soil cabin 3. In this embodiment, the diversion slurry introducing pipe 18 includes four.

Example 2

The present embodiment provides a method using the system described in embodiment 1, which includes the following specific steps:

in the TBM mode, as shown in FIG. 1, the slurry enters the soil chamber 3 from the slurry inlet pipeline 11, and the liquid level of the slurry 5 is controlled at 1/3-1/2 of the height of the soil chamber, so that the liquid level covers one end of the slurry discharge pipeline 7; the slurry inlet pipeline 11 is used for feeding slurry from the bottom of the slurry and rolling the slurry at the bottom of the soil cabin, so that the slag carrying efficiency of the slurry discharge pipeline 7 is improved, the dilution of the slag soil is facilitated, and the risk of mud cakes is reduced; the slurry is discharged simultaneously by the slurry discharge pipeline 7 and the spiral slag extractor 12.

When the tunnel is tunneled in the TBM mode, most of hard rocks 1 are cut into small fragments due to the high rotating speed and high torque characteristics of the cutter head 2, and it can be considered that when the strength of the hard rocks exceeds 200MPa or the shield machine is tunneled for a long time in the TBM mode, the abrasion amount of the hob is greatly increased, and phenomena such as eccentric wear and rollback can be generated, so that the rock breaking capacity of the hob in the TBM mode is greatly reduced, and rock gravels with larger particle sizes can be generated due to the insufficient rock fragment cutting capacity of the hob after tunneling. If only the slurry discharge line 7 is used for discharging slurry, the discharged slurry contains gravels with certain larger particle size, because the slurry discharge line has oneThe size limitation is determined, so that the blockage of the mud pipe is easily caused, and a large amount of mud is easily blocked because the mud cannot be discharged in time. At this moment, if adopt spiral slag extractor 12 to discharge the great rock gravel of particle size simultaneously, then just can solve the large granule footpath problem, make the thick liquid pipeline of row not have large granule stone, can effectively reduce the load and the pipe wear of management, reduce the plant maintenance cost, improve slag tapping system's safety and stability. Slurry circulation system combined with large flow (maximum slurry circulation flow 1200m of slurry inlet and discharge pipeline)³And h), the problem that the slurry circulating system still has large-particle-size rock gravels due to limited slag discharge capacity of the shield machine screw machine can be avoided, the problem of low construction efficiency is solved, and the construction capacity of the shield machine and the geological adaptability of the shield machine are effectively improved.

When the slurry is discharged from the slurry discharge pipeline 7, in order to improve the utilization rate of the slurry, the fragment intercepting and separating box 6 is arranged on the slurry discharge pipeline 7, the slurry is injected back into the second slurry guide pipe 14 after the fragment intercepting and separating box 6 intercepts the fragments of the slurry, and is injected back into the soil cabin 3 through the second slurry guide pipe 14, and the slurry guide pipe switch valve 16 is in a closed state. Through the process, the slurry inlet amount of about 500 to 800 cubic meters can be additionally increased, the circulating force of the slurry is increased, the beaten slurry enters from the middle lower part of the soil cabin 3, the circulating force of the slurry in the soil cabin is increased, and the probability of muck stagnation and discharge and cutter head mud cakes is reduced.

When the liquid level of the slurry 5 is less than 1/3 of the height of the soil cabin 3, as shown in fig. 2, the pipeline switch valve II 17 is in a closed state, the slurry guide pipe switch valve 16 is in an open state, the slurry enters the slurry guide pipe III 15 from the slurry guide pipe I8, and then is respectively driven into the soil cabin 3 through the shunt slurry guide pipes 18 until the liquid level of the slurry 5 rises to 1/3 of the height of the soil cabin 3; when the liquid level of the slurry 5 is higher than 1/2 of the height of the soil cabin 3, as shown in fig. 3, the pipeline switch valve II 17 is in a closed state, the slurry guide pipe switch valve 16 is in an open state, the slurry enters each diversion slurry guide pipe 18 respectively, flows back to the fragment intercepting and separating box 6 through the slurry guide pipe III 15 and the slurry guide pipe I8 in sequence, and is discharged through the other end of the slurry discharge pipeline 7 (the pipeline switch valve I9 is in an open state, and the pressure control valve 10 is used for regulating the pressure).

The flow of control thick liquid that sets up a plurality of reposition of redundant personnel slurry guide pipes can be better to and adjust the mud liquid level more accurately, avoid mud liquid level to change too greatly, thereby influence the pressure balance of excavation tunnel face.

Various other changes and modifications may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such changes and modifications should fall within the scope of the present invention.

Claims

1. A slurry circulation, slag discharge and slurry liquid level control system in a TBM (tunnel boring machine) mode is characterized by comprising a fragment intercepting and separating box, a slurry discharge pipeline, a slurry guiding pipe I, a pipeline switch valve I, a pressure control valve, a slurry inlet pipeline, a slurry guiding pipe II, a slurry guiding pipe III, a slurry guiding pipe switch valve and a pipeline switch valve II; the slurry inlet pipeline is communicated with a soil cabin of the shield tunneling machine; one end of the slurry discharge pipeline is communicated with the soil cabin, and the other end of the slurry discharge pipeline is sequentially provided with a pipeline switch valve I and a pressure control valve; the slurry discharge pipeline is communicated with a fragment intercepting and separating box, the fragment intercepting and separating box is communicated with one end of a second slurry guiding pipe, and the other end of the second slurry guiding pipe is communicated with the soil cabin; the fragment intercepting and separating box is also communicated with one end of a first slurry guiding pipe, the other end of the first slurry guiding pipe is communicated with one end of a third slurry guiding pipe, and the other end of the third slurry guiding pipe is communicated with the soil cabin; a slurry leading pipe switch valve is arranged on the first slurry leading pipe; the lower part of the soil cabin is also communicated with a spiral slag extractor; and a pipeline switch valve II is arranged on the slurry guiding pipe II.

2. The system of claim 1, wherein the other end of the slurry guiding pipe III is respectively communicated with a plurality of shunt slurry guiding pipes, and all the shunt slurry guiding pipes are communicated with the middle part of the soil cabin.

3. The system of claim 1, wherein the slurry inlet line communicates with a lower portion of a soil chamber of the shield machine.

4. The system of claim 1, wherein one end of the slurry discharge line communicates with a lower portion of the soil chamber.

5. The system of claim 1, wherein the other end of the slurry guide pipe II is communicated with the lower part of the soil cabin.