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Method for solving HBW-rich grease mud cake in sandy gravel stratum shield tunneling

A technology of oil mud and sand and pebbles, which can be used in earth-moving drilling, mining equipment, tunnels, etc., and can solve problems such as enrichment

Inactive Publication Date: 2020-06-19
BEIJING MUNICIPAL CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the mud cake in shield tunneling in sand and pebble stratum, this invention configures special A and B liquids to solve the problem of rich HBW mud cake in shield tunneling in sand and pebble stratum. The method that is rich in HBW mud cake in stratum shield tunneling, to solve the problem that raises in the above-mentioned background technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method to solve the problem of HBW-rich grease mud cake in sand and pebble formation shield excavation. Due to the occurrence of HBW-rich grease mud cake in sand and pebble formation under special circumstances, it is difficult to carry out shield tunneling. First, the shield machine Select 2 of the 4 HBW injection ports to be connected to a tee as a pressure relief ball valve, and select one of the 4 EP2 injection ports to be connected to a tee as a pressure relief ball valve for sealing and decompression.

[0030] Add a high-pressure water gun to the inside of the soil tank in the mud cake detection hole of the soil tank and the ball valve of the breast plate of the soil tank, and use the high-pressure water gun to cut the mud cake rich in HBW oil in the soil tank.

[0031] Inject liquid A into the interior of the soil tank through the mud cake detection hole of the soil tank to rotate the cutter head, and after a certain period of time, inject liquid B through the b...

Embodiment 2

[0039] A method for solving the problem of HBW-rich grease mud cake in shield excavation of sand and pebble stratum, adding liquids A and B one by one, and the rest of the steps are the same as in Example 1.

[0040] Composed of the following components by mass percentage:

[0041] Liquid A: alkaline aqueous solution (35%), catalyst (0.5%), wherein the molar ratio of alkaline aqueous solution to catalyst is 1:0.05.

[0042] Liquid B: dispersant (3‰), water.

[0043] First inject the prepared A liquid 0.9m through the mud cake detection hole of the soil tank for the first time 3 , rotate the cutter head, and after 5 to 30 minutes, inject the prepared B liquid 0.9m for the first time through the chest plate ball valve. 3 , continue to rotate the cutter head.

[0044] After injecting the prepared B liquid for the first time, inject 0.9m through the mud cake detection hole for the second time 3 A liquid, continue to rotate the cutter head, inject B liquid 0.9m after 5 to 30 mi...

Embodiment 3

[0047] A method for solving the problem of HBW-rich grease mud cake in shield excavation of sand and pebble stratum, adding liquids A and B one by one, and the rest of the steps are the same as in Example 1.

[0048] Composed of the following components by mass percentage:

[0049] Liquid A: alkaline aqueous solution (50%), catalyst (0.8%), wherein the molar ratio of alkaline aqueous solution to catalyst is 1:0.05.

[0050] Liquid B: dispersant (5‰), water.

[0051]First inject the prepared A liquid 0.9m through the mud cake detection hole of the soil tank for the first time 3 , rotate the cutter head, and after 5 to 30 minutes, inject the prepared B liquid 0.9m for the first time through the chest plate ball valve. 3 , continue to rotate the cutter head.

[0052] After injecting the prepared B liquid for the first time, inject 0.9m through the mud cake detection hole for the second time 3 A liquid, continue to rotate the cutter head, inject B liquid 0.9m after 5 to 30 min...

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PUM

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Abstract

The invention discloses a method for solving a HBW-rich grease mud cake in sandy gravel stratum shield tunneling, which belongs to the field of subway shield tunneling mud cakes and solves the problemof the HBW-rich grease mud cakes. The technical key point is that liquor A containing an alkaline solution and a catalyst and liquor B containing a dispersing agent are used for treating the HBW-richgrease mud cake according to certain construction process. A shield tunneling machine stops to perform depressurization treatment, a high-pressure water gun is additionally arranged inside a soil cabin at a soil cabin mud cake detecting hole and a soil cabin sternal plate ball valve for cutting the mud cake; the prepared liquor A is injected through the sternal plate ball valve, a cutter disc isrotated, liquor B is injected 5-30 minutes later through the mud cake detecting hole, and the cutter disc is continuously rotated for mixing. The method solves the problem of clearing the HBW-rich mudcake in a case that an underground shield is inconvenient for breaking the cabin.

Description

technical field [0001] The invention relates to the field of shield tunneling in sand and pebble formations, in particular to a method for solving the problem of HBW-rich grease mud cake in shield tunneling in sand and pebble formations. Background technique [0002] With the rapid development of my country's economy, infrastructure construction such as railways, highways, rail transit, and water conservancy has also been accelerated. As the most advanced and safest construction method in the field of underground engineering, the shield tunneling method has been widely used. Since the shield method was adopted for construction, the problem of mud cake formation on the cutter head has always been a difficult problem. In recent years, a series of solutions have been invented at home and abroad to solve the phenomenon of mud cake formation on the cutter head in the clay layer containing more minerals. Research and treatment of cutter head mud cake phenomenon in sand and pebble ...

Claims

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Application Information

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IPC IPC(8): E21D9/06E21D9/08
CPCE21D9/08E21D9/0642
Inventor 孔恒郭飞赵欣徐鹏飞张咪张春发赵晨阳樊雅丽于春波张宝亮姜瑜田治州高胜雷刘海健吴钦刚刘小龙
Owner BEIJING MUNICIPAL CONSTR