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软土地层条件下,超深基坑广泛采用地下连续墙作为围护结构,由于超深地下连续墙施工具有大型机械种类多、施工组织复杂、安全风险大、地质条件复杂、工期长和造价高等特点,解决关键技术问题是施工阶段的重中之重。文章以于家堡地下综合交通枢纽工程为背景,运用系统科学理论,通过槽壁的变形和稳定性分析、优化施工组织等方法,对施工质量影响重大的垂直度偏差、槽壁坍塌、抓斗卡埋、混凝土绕流和接缝渗漏问题进行研究,提出具体的预防措施和处理方案,完善了超深地下连续墙关键施工技术。
Under the conditions of soft ground, the underground continuous wall is widely used as the envelope for ultra-deep foundation pit excavation. Because of the large variety of mechanical construction, complex construction, high safety risk, complex geological conditions, long construction period and high cost Characteristics, to solve the key technical issues is the top priority during the construction phase. Based on the project of Jiajiabao Underground Comprehensive Transportation Hub, the article uses the theory of system science, through the analysis of deformation and stability of the tank wall, optimization of construction organization and other methods, which has great influence on the construction quality, vertical deviation, wall collapse, Card buried, concrete around the flow and leakage of joints to study, put forward specific preventive measures and treatment programs, improve the ultra-deep underground continuous wall key construction technology.