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发明公开
CN103075161A 一种泥水盾构施工地下障碍物快速清除方法 无效 - 撤回

一种泥水盾构施工地下障碍物快速清除方法
摘要：
本发明属于地铁盾构隧道施工技术领域，具体涉及一种泥水盾构施工地下障碍物快速清除方法。该方法对需清障地层区域采用液氮进行冷冻，然后带压进仓清除地下障碍物。本发明有如下优点：1、快速有效，本方法只需先进行冷冻孔施工，然后快速冷冻，在短时间内能达到清除地下障碍物的目的，能有效节省工期；2、安全性高，本方法采用液氮进行冷冻，冷冻时间短，对周边环境造成的影响较小，同时冷冻后地层强度高，为人工带压进仓作业提供了可靠的安全保障。
摘要（英）：

The invention belongs to the technical field of subway shield tunnel construction, and particularly relates to a quick underground obstacle clearing method for slurry shield construction. According to the method, liquid nitrogen is used for refrigerating a stratum region with an obstacle clearing requirement, and an underground obstacle in a chamber is cleared under pressure. The method has the advantages that 1, the method is quick and effective, namely only a refrigeration hole is required to be constructed for quick refrigeration, the aim of clearing the underground obstacle within a short time can be fulfilled, and a construction period can be effectively shortened; and 2, the method is high in safety, namely the liquid nitrogen is used for refrigeration, so that the refrigeration time is short, influence on an ambient environment is small, a refrigerated stratum is strong in strength, and the safety of manual operation under pressure in the chamber is reliably ensured.

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