粗颗粒土层组合中的超深基坑复合土钉墙支护的合理性分析及探讨

对粗颗粒土层组合的超深基坑,采用了复合土钉墙支护结构形式进行设计,并对该深基坑的开挖及支护过程进行了系统监测。主要监测项目有土钉钢筋受力、锚索轴力及坡顶水平位移,通过对监测结果进行系统分析,并与传统的受力模型进行对比,分析本基坑在此方面的普遍性与特殊性,找出成功点与失败点,为今后类似工程提供借鉴。

Analysis and Discussion about the Rationality of the Super-deep Foundation Pit Supported by Composite Soil Nailing Wall in the Coarse Granular Soil Layer

The composite soil nailing wall supporting structure has been used in the super-deep foundation pit at the coarse granular soil layer. Systematic monitoring was conducted on the excavation and supporting processes of the deep foundation pit. Main monitoring items are soil nail reinforcement stress, anchor axial force and displacement of the top of slope. By systematically analyzing of the monitoring results, and comparing them with the traditional mechanical model, the universality and particularity of this foundation pit are given in this paper. We try to nd the successful and failed aspects of this project to provide references for future similar projects.