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西部含水软岩地层建井人工冻结法中冻结器与围岩间环形空间的有效封堵,是防止冻结壁解冻后沿冻结器漏水的关键。当前主要采用缓凝水泥浆置换技术。通过对该区域3个冻结工程总结,分析了影响置换高度的各影响因素,如承压水层压力水头、冻结器底端距最近的承压水层底板的距离及底板岩性、承压水水质、冻结深度及冻结管下放时间。
The effective blockage of the annular space between the freezer and the surrounding rock by artificially freezing method in the western soft rock formation wells is the key to prevent water leakage along the freezer after thawing the frozen wall. The current main use of slow water slurry replacement technology. By summarizing the three freezing projects in this area, the influencing factors such as the pressure head of confined aquifer, the distance from the bottom of the freezer to the nearest confined aquifer floor, the lithology of bottom plate, the pressure of confined water Water quality, freezing depth and freezing pipe down time.