深厚卵砾石层冻结壁出水原因分析及治理

介绍了伊犁一矿副井冻结施工中冻结壁出水情况,为分析出水原因,进行了主圈冻结孔冻结器纵向测温;并根据单根冻土柱导热情况,建立了瞬时停冻后冻土柱内温度分布规律,借助Maple软件进行了分析计算。分析结果显示:副井存在一条由北侧流向南侧偏东的地下暗流,地下水的异常流动影响了冻结壁的交圈,而使冻结壁出现"窗口"。采用注浆降低地下水流速,并加强冻结的方式,有效地解决了地下水异常流动影响冻结壁交圈的事故,保证了冻结井筒施工安全。

Analysis and Treatment on Water Irruption of Freezing Shaft Lining in Thick Gravel Layer

Described the situation of water flowing through the freezing shaft lining in auxiliary shaft of YiLi’s First Core mine. In order to analyze the reason of streaming, measured the temperature along the freeze pipe of master circle. According to the heat-transfer law of a single frozen column, a mathematical model of single freezing soil pole was established in order to calculate transit rising temperature field. By using the modern software of the Maple, the formula is figured out with chart. The results showed that there is a stream from North to Southeast underground of auxiliary shaft, and freezing shaft lining was affected by unusually flowing of groundwater, which caused a “window” in the frozen wall. Use grouting to reduced the flow rate of groundwater, and reinforced freezing, resolved the incidents effectively affected by unusually flowing of groundwater, and ensured the security of freezing shaft construction .