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盾构工程中始发是技术重点难点并且是事故多发地带,始发井止水帷幕施工技术是盾构始发、到达重要技术环节,始发井围护结构加固是为了保证地层稳定、防止地下水流入到工作井区域。广州某地铁工程的搅拌桩施工过程受到车站围护结构钢花管的限制,采取了旋喷桩施工法加固。本文结合工程实例介绍旋喷桩加固方法,为类似工程提供参考。
Shielding project is the starting point of technical difficulties and is the accident zone, the starting well water curtain construction technology is the shield origin, to reach the important technical aspects, the initial well retaining structure reinforcement is to ensure stratum stability, prevent groundwater Flow into the working well area. The construction process of the mixing pile in a metro project in Guangzhou is limited by the steel pipe of the station envelope structure and the construction of the jet grouting pile is adopted to reinforce it. In this paper, examples of engineering examples of jet grouting pile reinforcement methods for similar projects provide a reference.