砂卵石地层冻结施工联络通道的钻孔工艺研究

摘要

In order to research the common tube breakage of the freezing construction’ s contact passage in the sandy cobble stratum, analyzes the difficulties in the drilling construction of the contact passage, points out some improvement approaches by altering the sizes of the freezing pipe and adjusting the weak zone interface, so as to lower the risks of the breakage accidents according to the site calculation and numeric simulation.%为了研究冻结法施工联络通道在砂卵石地层中常见的断管现象，对联络通道钻孔施工的难点进行了分析，提出了改变冻结管尺寸，调整薄弱区域界面的改进方式，并通过现场验证以及数值模拟计算，最终降低了断管事故的发生风险。