复杂施工空间条件下砂卵石地层联合降水控制

以成都地铁5号线中医大地铁站为切入点,地质情况复杂、异形深基坑开挖施工困难情况下,如何保证深基坑在干燥环境下施工和车站结构不发生渗漏是本工程的重点。通过理论分析和数值模拟方法,作出深基坑开挖前降水周边建筑的沉降云图,研究成都地铁中医大车站深基坑降水对周围环境的影响程度。针对性进行了复杂施工条件下深基坑降水对线路的影响分析及降水控制计算,得出了复杂施工空间条件下工程降水引起底面沉降的原因及联合降水控制方法,可为今后类似工程的施工提供借鉴。

Combined Dewatering Control in Sandy Gravel Stratum Under Complicated Construction Space Condition

This paper takes the TCM Station of Chengdu Metro Line 5 as the breakthrough point,aiming at the complicated geological conditions and difficulties in excavation of special-shaped deep foundation pit,there are some key points of ensuring the dry circumstance for construction and non-water leakage to suffer the station structure in this project.By theoretical analysis and numerical simulation,the cloud figure of surrounding buildings is made before deep foundation pit excavation to study the influence of deep foundation pit dewatering on the surrounding environment of Chengdu Metro TCM cart station,the influence analysis and control calculation of deep foundation pit dewatering on the line are carried out under complex construction conditions.The combined dewatering control method under complex construction space conditions is obtained to guide analogical engineering.