| 土钉墙地基承载力问题探讨 |
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| 引用本文： | 秦会来,周同和,郭院成,杜超.土钉墙地基承载力问题探讨[J].岩土力学,2014,35(Z2):393-397. |
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| 作者姓名： | 秦会来 周同和 郭院成 杜超 |
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| 作者单位： | 1. 中国建筑股份有限公司技术中心，北京101300；2. 郑州大学 综合设计研究院，郑州 450002； 3. 郑州大学 土木工程学院，郑州 450002；4. 中国建筑西南勘察设计研究院有限公司，成都 610081 |
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| 基金项目： | 中建股份科技资助（No. CSCEC-2010-Z-01）。 |
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| 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。
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| 关 键 词： | 地基承载力 土钉墙 有限元法 |
| 收稿时间： | 2014-06-14 |
Study of basal bearing capacity for soil nailing walls |
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| QIN Hui-lai,ZHOU Tong-he,GUO Yuan-cheng,DU Chao.Study of basal bearing capacity for soil nailing walls[J].Rock and Soil Mechanics,2014,35(Z2):393-397. |
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| Authors: | QIN Hui-lai ZHOU Tong-he GUO Yuan-cheng DU Chao |
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| Institution: | 1. Technical Center, China State Construction Engineering Corporation, Beijing 101300, China； 2. Comprehensive Design Institute，Zhengzhou University, Zhengzhou 450002, China； 3. School of Civil Engineering, Zhengzhou University, Zhengzhou 450002, China； 4. China Southwest Geotechnical Investigation & Design Institute Co.,Ltd.,Chengdu 610081, China |
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| Abstract: | Basal bearing capacity calculation is one of the important issues for soil nailing wall design. In Chinese excavation engineering, the bearing capacity of soil nailing walls is usually taken into consideration with the basal stability analysis. Soil nailing wall models are established in the Plaxis3D. Finite element method is employed to study the foundation soil′s failure mode, the failure loads and the basal stress distribution of the soil nailing wall. The analysis mode in Chinese excavation codes for bearing capacity of soil nailing walls is examined based on the results from the finite element method; and some problems are detected. Referring to the bearing capacity calculation mode for the mechanically stabilized earth walls, and based on the stress distribution under the soil nailing wall, the soil nailing walls are considered as rigid footings with inclined and eccentric loads. The solutions for rigid footings with inclined and eccentric loads proposed by Meyerhof and Vesic are used to calculate the bearing capacity of soil nailing walls. Calculation results show that the solutions by Meyerhof are more consistent with the truth; so that the bearing capacity analysis mode for soil nailing walls is presented. |
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| Keywords: | bearing capacity soil nailing walls finite element method |
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