【摘要】 广州某电缆隧道始发井采用地下连续墙内支撑支护形式,该场地地质条件相对复杂,开挖深度超过21m。监测数据分析结果表明,底板的浇筑有利于围护结构的侧向变形减小;地下连续墙的侧向变形受2个因素影响:一是内支撑的间隔,二是基坑的开挖深度;支撑的不合理布置使得支撑的内力分布不均等。同时总结了基坑开挖过程中异常数据的分析及安全预测,以确保施工现场和周围环境的安全。更多还原

【Abstract】 The diaphragm wall with inside supporting type is used for original well of some cable tunnel in Guangzhou,and the geological conditions in the site are relatively complex,the excavation depth is more than 21m. The results of the monitoring data show that bottom slab pouring can reduce the lateral deformation of retaining structure. There are two factors influencing the lateral deformation for the diaphragm wall, one is the inner support interval, the other is the foundation excavation depth, unreasonable layout of the inner support makes internal force distribution unequal. At the same time,the analysis of the abnormal data in the process of excavation is summed up,and safety precautions are adopted in time to ensure that the construction site and the surrounding environment are safe.更多还原