土钉墙地基承载力问题探讨

发布时间：2018-06-09 15:30

本文选题：地基承载力 + 土钉墙　；参考：《岩土力学》2014年S2期

【摘要】：土钉墙墙底地基土的承载力验算是土钉墙支护设计的一项重要内容。国内的工程实践中,通常将土钉墙地基承载力与坑底土抗隆起验算合并考虑。针对具体案例,通过Plaxis3D有限元数值模拟,分析研究了土钉墙底部土体发生地基承载力失稳的破坏模式、破坏荷载以及土钉墙墙底应力分布特点等,探讨了依据我国相关规程进行土钉墙坑底隆起或地基承载力计算可能存在的问题。借鉴国外加筋土挡墙地基承载力计算的一般方法,将土钉墙作为荷载倾斜、偏心的刚性基础对待,利用荷载倾斜、偏心条件下传统刚性浅基础的地基承载力的Meyerhof解和Vesic解,对土钉墙地基承载力进行了计算和对比,通过对比发现,Meyerhof解更接近实际,据此,提出了土钉墙地基承载力计算的合理模式。
[Abstract]:Checking calculation of soil bearing capacity of soil nailing wall is an important part of soil nailing wall supporting design. In domestic engineering practice, the bearing capacity of soil nailing wall foundation is usually considered in combination with the check calculation of soil uplift resistance at the bottom of the pit. In this paper, through finite element simulation of Plaxis 3D, the failure mode, failure load and stress distribution of soil bearing capacity at the bottom of soil nailing wall are analyzed and studied. The problems of soil nailing wall uplift or foundation bearing capacity calculation according to relevant regulations in China are discussed. Referring to the general calculation method of foundation bearing capacity of reinforced earth retaining wall in foreign countries, soil nailing wall is treated as load inclined, eccentric rigid foundation, Meyerhof solution and Vesic solution of foundation bearing capacity of traditional rigid shallow foundation under eccentric condition. The bearing capacity of soil nailing wall foundation is calculated and compared. It is found that the Meyerhof solution is closer to the actual situation. Based on this, a reasonable model for calculating the bearing capacity of soil nailing wall foundation is put forward.
【作者单位】：中国建筑股份有限公司技术中心;郑州大学综合设计研究院;郑州大学土木工程学院;中国建筑西南勘察设计研究院有限公司;
【基金】：中建股份科技资助(No.CSCEC-2010-Z-01)
【分类号】：TU470;TU476

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