未冻水仓影响深厚冻结壁安全的探讨

Research of unfrozen water storehouse for the safety of deep-thick frozen wall

指出随着表土层厚度的逐渐增大,冻结法凿井工程中多圈冻结管设计越来越多,多圈冻结工程中,极有可能在两排冻结管交圈以后两者之间形成未冻土夹层,在适宜的工程地质条件下,甚至有可能形成密闭的水仓,这是冻结工程的重大安全隐患,针对这个问题,探讨了形成密闭水仓的可能条件、危害及施工处理对策,以期为深厚表土层冻结法凿井工程提供指导。

With the depth gradually augment of alluvium,there are more and more design of three circle freezing pipes in freezing sinking shaft engineering.However,the unfrozen soil interlayer fearfully maybe formed after the freezing pipe circle-crossing,and obturating water storehouse also maybe formed in seemly engineering geological condition,which will be the important safety hidden trouble.The forming conditions,disadvantages and engineering disposal countermeasures of obturating water storehouse are discussed in this paper,and which are provided references for freezing sinking shaft engineering in deep alluvium.