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Slurry circulation system of slurry balance shield and slurry balance shield

A mud-water balance and circulation system technology, which is applied in mining equipment, earthwork drilling, tunnels, etc., can solve problems affecting the mud-water balance shield construction efficiency, ground collapse in front of the cutterhead, and inability to dredge the mud door, so as to prevent landmark settlement or uplift phenomenon, reduce slurry pressure, prevent surface subsidence or uplift effect

Pending Publication Date: 2017-08-01
CHINA RAILWAY TUNNEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the mud-water balance shield is in the clay stratum, sandy pebble stratum and when passing through obstacles, the mud door will be blocked. Once the mud door is blocked, it will not only affect the construction efficiency of the mud-water balance shield, but also cause the following dangerous situations: 1. The pressure of the excavation chamber suddenly rises, which may cause the ground to bulge or be broken down
2. It is not easy to dredge after the excavation chamber is blocked, and it needs a long cycle, which may lead to the collapse of the ground in front of the cutter head
3. After the excavation bin is blocked, the normal circulation cannot dredge the mud door. At this time, it needs to be manually processed under pressure. The risk of entering the bin under pressure is high and the cost is high
4. After the warehouse is blocked, the cutter head may be stuck

Method used

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  • Slurry circulation system of slurry balance shield and slurry balance shield
  • Slurry circulation system of slurry balance shield and slurry balance shield
  • Slurry circulation system of slurry balance shield and slurry balance shield

Examples

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Embodiment 1

[0028] join figure 1 , a mud-water balance shield mud circulation system, including a slurry inlet pipe 1 and a slurry discharge pipeline 2, and also includes a The slurry return circulation pipeline 3 of the slurry discharge pipeline 2, a flow divider 4 is set at the connection between the slurry return circulation pipeline 3 and the slurry discharge pipeline 2 to facilitate the smooth return of the slurry to the return circulation pipeline 1 Inside, a booster pump 5 is arranged on the mud return pipeline, and the first end of the slurry inlet pipeline and the second end of the slurry discharge pipeline of the booster pump 5 are respectively provided with valves.

[0029] The booster pump 5 is a centrifugal pump, which is used for pumping and discharging mud and pressurizing pipelines, which can increase the slurry feeding pressure, increase the slurry feeding flow rate, enhance the slag-carrying capacity of the slurry, and further enhance the excavation chamber 8. Increased...

Embodiment 2

[0032] join figure 2 , a mud-water balance shield, comprising a cutter head 7, an excavation chamber 8, an air cushion chamber 9, a mud door 10, a stone crushing device 11, a gas pressure maintaining device 12, an excavation chamber pressure detection device, an electric control system 13 and a mud Circulation system, wherein the mud circulation system includes a slurry inlet pipeline 1, a slurry discharge pipeline 2 and a mud return pipeline 3, and the mud return circulation pipeline 3 is arranged between the slurry inlet pipeline 1 and the slurry discharge pipe The slurry inlet pipeline 1 and the slurry discharge pipeline 2 are connected between the pipelines 2, and a flow divider 4 is set between the slurry return circulation pipeline 3 and the slurry discharge pipeline 2 to facilitate the smooth return of the slurry to the slurry discharge pipeline. In the circulation pipeline 1, a booster pump 5 is arranged on the mud return pipeline 3, and valves are respectively set at...

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Abstract

The invention discloses a slurry circulation system of a slurry balance shield. The slurry circulation system comprises a slurry inlet pipeline and a slurry outlet pipeline and further comprises a slurry return-stirring circulation pipeline which is arranged between the slurry inlet pipeline and the slurry outlet pipeline and communicates with the slurry inlet pipeline and the slurry outlet pipeline; a flow dividing device is arranged between the slurry return-stirring circulation pipeline and the slurry outlet pipeline; a booster pump is arranged on the slurry return-stirring circulation pipeline; and valves are arranged at the slurry inlet pipeline end and the slurry outlet pipeline end of the booster pump correspondingly. The invention further discloses the slurry balance shield. The slurry circulation system comprises the slurry return-stirring circulation pipeline which is arranged between the slurry inlet pipeline and the slurry outlet pipeline and communicates with the slurry inlet pipeline and the slurry outlet pipeline; the flow dividing device is arranged between the slurry return-stirring circulation pipeline and the slurry outlet pipeline; the booster pump is arranged on the slurry return-stirring circulation pipeline; and the valves are arranged at the slurry inlet pipeline end and the slurry outlet pipeline end of the booster pump correspondingly. According to the slurry circulation system of the slurry balance shield and the slurry balance shield, occurrence of excavation bin blockage in the tunnelling process can be reduced, and the tunnelling efficiency is improved.

Description

technical field [0001] The invention relates to a mud-water shield machine for underground engineering, in particular to a mud-water balance shield mud circulation system and a mud-water balance shield. Background technique [0002] With the continuous growth of my country's infrastructure, the use of underground space is also the key direction of domestic construction research, and with the introduction of shield tunneling, the development of underground space has become more and more convenient and safe. Shields are mainly divided into earth pressure balance shields and mud-water balance shields. Among them, the mud-water balance shield stabilizes the front soil through the mud with adjustable pressure when the shield is cutting the soil in front of it, and because the mud-water balance shield is completely sealed during the entire excavation process, its stability to the stratum is better than that of the soil. Therefore, mud-water balance shields are becoming more and mo...

Claims

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Application Information

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IPC IPC(8): E21D9/12E21D9/08
CPCE21D9/08E21D9/12
Inventor 王延辉叶康慨王超锋叶忠夏站辉王云峰闫谋权李浩磊郑勇宋健李结元邹晓艳
Owner CHINA RAILWAY TUNNEL
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