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地处闹市区的超深基坑开挖至十几米时,遇大范围较严重的流砂和管涌。通过采取基坑外多排双液注浆,同时坑内围护桩间喷射混凝土密封,结合监测信息对周围道路压密注浆回填、居民楼周边压密注浆回填等措施,确保了基坑和周围环境的安全,并使基坑开挖达到设计标高。
Located in the downtown area of ultra-deep foundation pit excavation to more than ten meters, the case of a larger range of more serious sand and piping. By adopting multi-row double-liquid grouting outside the foundation pit and injecting concrete seal between the retaining piles in the pit, measures such as compaction grouting and backfilling of surrounding roads and compaction grouting and backfill around the residential building are combined with the monitoring information to ensure that the foundation pit and The safety of the surrounding environment, and excavation of the foundation pit to achieve the design elevation.