北京地区某复杂条件下深基坑变形控制

Deformation Control in Deep Excavation Supporting System in Beijing Soils

以北京某基坑工程为例,根据基坑周边条件、变形要求、施工荷载及后期建设需要,分别选用桩锚、土钉墙加桩锚的支护形式进行设计,在满足安全、稳定的前提下,做到了经济、可行、易实施。在施工过程中,以监测数据为依据,以护坡桩、土方开挖、锚杆等多种方式控制基坑总变形。工程监测数据及现场情况表明,基坑最大变形控制在要求范围以内,为后期类似工程的处理提供了借鉴实例。

Two cost effective,common and safe deep excavation support systems were used in a deep excavation deformation control in Beijing.The soldier pile and lagging wall with ground anchors as well as soil nailed wall with soldier pile and ground anchors were selected based on the adjacent conditions of the excavation areas,deformation requirements;construction as well as post construction loading conditions.During the construction,various construction elements were monitored.The deformations in the soldier pile,amount of soil excavated and the ground anchors were used for the overall deep excavation control.The results indicated that total deformation control were successful.