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Oxidative digestion method for treating mud cake on shield cutter head

A technology of shield cutter head and mud formation, which is applied in earthwork drilling, mining equipment, tunnels, etc. It can solve problems such as ineffective construction response methods, decreased propulsion speed, and increased cutter head torque, and achieves pressure injection mode Safe and convenient effect

Active Publication Date: 2020-08-11
SHANGHAI TUNNEL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the shield cutter head is caked with mud, the torque of the cutter head will increase, and the advancing speed will decrease, which will reduce the tunneling efficiency and affect the construction progress
[0003] There has been no effective construction solution to the problem of mud buildup on the shield cutter head

Method used

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  • Oxidative digestion method for treating mud cake on shield cutter head
  • Oxidative digestion method for treating mud cake on shield cutter head
  • Oxidative digestion method for treating mud cake on shield cutter head

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Embodiment Construction

[0026] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0027] When the shield cutter head is constructed in strata with high clay content such as mudstone, shale, sandy mudstone, clay, etc., the sticky mineral particles in the stratum are easy to hydrate, which makes the muck and soil easily stick to each other and easily Attached to the cutter head and cutter, resulting in mud cake formation on the cutter head and cutter, the cutter’s ability to effectively cut the soil is low, and the mu...

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Abstract

The invention provides an oxidation digestion method for treating forming of mud cakes of a shield cutter head. When the mud cakes are formed, a shield machine shuts down, a decomposition solution isinjected into a shield excavation cabin and the shield cutter head, the formed mud cakes are soaked and decomposed, when the decomposition is completed, the construction of the shield machine is resumed, wherein the decomposition solution is an oxidant solution; and an exhaust outlet is formed in the upper part of the shield excavation cabin, and gas generated from the oxidant solution in the process of decomposing the mud cakes is discharged. The oxidation digestion method is a chemical treatment method for forming of the mud cakes of a shield without opening the cabin, the method can automatically remove the mud cakes without opening the cabin, manual treatment is not required, investment and construction time are saved, meanwhile, the safety risk of personnel can be avoided, and the oxidant solution mainly generates water after the reaction and does not cause damage to the surrounding environment.

Description

technical field [0001] The invention relates to the field of tunnel construction by shield tunneling method, in particular to an oxidation and digestion method for processing mud cake on a shield cutterhead. Background technique [0002] In recent years, with the rapid development of urban infrastructure, the construction of shield tunnels has become more and more popular, and the construction of tunnels has gradually developed in the direction of large diameter and large buried depth. The geological conditions in the tunneling section of the shield machine are becoming more and more complex, and the occurrence of mud cake formation on the cutter head of the shield machine frequently occurs. Once the shield cutter head is caked with mud, the torque of the cutter head will increase, and the advancing speed will decrease, which will reduce the tunneling efficiency and affect the construction progress. [0003] There has been no effective construction solution to the problem o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/08
CPCE21D9/0678E21D9/08
Inventor 董明钢李鸿倪正茂裘华邵金洪袁风波范杰黄德中孙晗徐辰春何国军夏源思郑宜枫胡群辉杨建平钱凯赵阳孙振东何昀王志华罗赛楠左志学杨燚傅晓瑞倪博炜韩嘉臻
Owner SHANGHAI TUNNEL ENG CO LTD
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