摘要
Abstract
Retaining structure construction was a key challenge in project implementation,because ultra-long metro station foundation pits had these characteristics such as large spans,complex geological conditions,and stringent deformation control requirements.Based on a soft soil foundation pit with a total length of 810.0 m and a depth of 23.9 m,a diaphragm wall was adopted as the retaining structure.In combination with the site's geological and hydrogeological conditions and technical challenges,this study systematically reviewed key technologies such as guide wall construction,slurry preparation,trench excavation and bottom cleaning,reinforcement cage hoisting,and concrete pouring.Emphasis was placed on quality control and safety measures under soft soil conditions.Monitoring results show a maximum wall top displacement of 28 mm and a seepage rate of less than 0.3%,with all indicators meeting design and code requirements.The study confirms that this set of construction and risk control technologies can effectively ensure the construction quality of diaphragm walls for ultra-long foundation pits in soft soil areas.关键词
软土地区/深基坑/地下连续墙/关键工序/监控量测/沉降控制/风险防控Key words
soft soil areas/deep foundation pit/diaphragm wall/key technologies/monitoring and measurement/settlement control/risk prevention and control分类
建筑与水利
