武汉江底高承压水联络通道施工风险控制

Construction Risk Control on Connected Aisle Under High Pressure Water in Wuhan

联络通道施工风险较高,是地铁建设风险控制的关键点。2号联络通道位于长江江底的高承压水粉细砂层中,采用冻结法施工。详细介绍了联络通道冻结法施工的风险,提出了相应的预防措施和事后处理措施,结合监测数据得出一些规律,提出冻结法施工关键在于综合考虑确定各项施工参数,及时注浆,及时监测测温孔、泄压孔、去回盐液温差的数据变化。

The construction risk of connected aisle is higher, and it is the key point of the subway construction risk control. No. 2 connecting passage under high pressure water was constructed by freezing method in the fine sand layer in the Yangtze River. This paper introduces the risk of freezing method construction of connecting aisle under the top pressure underwater fine sand layer, puts forward the preventive measures and treatment measures. Combined with the monitoring data, this paper gets some rules and suggests that comprehensive consideration of various construction parameters, such as grouting in time, timely monitoring of the thermometer hole and pressure relief hole, the data changes of salt liquid temperature, is the key of high pressure water freezing method construction of connecting passage.