超深圆形基坑的力学监测与分析研究

在工业建筑的地下工程中,需开挖37.4 m深的圆形基坑,使用了内力与变形监测系统,以确保支护结构的稳定性.现场监测数据表明,以品字形分布的由排桩、冠梁、腰梁构成的支护结构措施与地下连续墙相似.由于该支护结构的刚度和强度均较高,因此由开挖基坑所造成的扰动在较小的变形范围内得到了控制.由于采取合理的加固措施并设置适当的施工工期,邻近的17m深矩形基坑对圆形基坑开挖带来的影响可控制在允许范围之内.

Mechanics monitoring and analysis on ultra-deep circular foundation pit

For the underground works of industrial buildings, a 37.4 m circular pit of should be excavated, where internal force and distortion monitoring system is employed to ensure the stability of retaining structures, it is shown by the site monitoring data that the retaining structure measures of row-piles,top beam and wale in distribution of deltatube type is similar to the underground diaphragm wall. As the stiffness and strength of the retaining structure are relatively high, the distortion range caused by the interference of pit excavation is under control. With appropriate reinforcement measures adopted and proper construction period set, the iulluenee on circular pit excavation brought by the adjacent 17 m rectangle pit is controlled within acceptable range.