填土基坑土钉墙设计与检测分析

Design and detection analysis for fill￣back trench soil nailing wall

为了了解土钉墙在填土基坑支护设计上的有何特殊之处,以及土钉在抗拔试验中的力学性能是否能够达到设计要求,以实际工程为依托,对土钉墙设计在整体稳定和内部稳定两方面进行了校核,并与工程实际进行对比,在土钉抗拔试验结果分析时着重分析了出现不合格的土钉的施工和设计的方面的因素,在土钉墙的整体工作状态方面有了比较详尽的论述,对不合格土钉的出现有了比较全面的阐述,提出了几点对土钉墙设计及施工方面的建议和意见,并提出了土钉设计安全系数修正的新概念.

In order to tell the particularity of soil nailing wall in design of fillback ditch shoring, if the mechanical performance of soil nailing in tensile strenth test can meet design requirement, this paper based on practice checks up the design of soim nailing in overall and inner stability which is compared with that in engineering practice. In the analysis of tensile strenth test result, factors on construction and design are specially analyzed when soil nailing is unqualified, integral inservice state and reason for the unqualification of soil nailing are discussed in detail, suggestions for the design and construction of soil nailing are given following, and new concept of soil nailing design safety coefficient modification is put forward.