| 临近基坑既有建筑物地基的抗剪强度指标取值问题 |
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| 引用本文： | 王红雨.临近基坑既有建筑物地基的抗剪强度指标取值问题[J].岩土力学,2008,29(8):2215-2220. |
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| 作者姓名： | 王红雨 |
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| 作者单位： | 宁夏大学,土木与水利工程学院,银川,750021 |
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| 摘 要： | 基坑开挖不仅改变了半无限空间体边界条件,卸载时还会引起周围地层移动,导致既有建筑物地基承载力的附加损失.在临近基坑既有建筑物地基承载力计算中,其抗剪强度参数的选取有别于斜坡上地基计算参数的常规取值方法.通过探讨临近基坑既有建筑物地基抗剪强度指标的取值问题,建议以地基土的完全软化强度与残余抗剪强度的平均值作为临近基坑既有建筑物地基抗剪强度指标,并据此估算了临近基坑既有建筑物地基承载力.所得结果与斜坡上地基承载力的试验值和理论解对比分析后显示出其具有一定的合理性.所建议的抗剪强度指标取值方法,还有待于试验的进一步验证.
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| 关 键 词： | 临近基坑 既有建筑物 地基土 抗剪强度指标 |
| 收稿时间： | 2006-12-25 |
Shear strength index of soils in bearing capacity analysis for existing footings near excavations |
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| WANG Hong-yu.Shear strength index of soils in bearing capacity analysis for existing footings near excavations[J].Rock and Soil Mechanics,2008,29(8):2215-2220. |
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| Authors: | WANG Hong-yu |
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| Institution: | College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China |
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| Abstract: | As excavations may cause change of the boundary conditions and the additional loss of bearing capacity of footings due to unloading induced lateral soil movement. Selection of shear strength parameters used in bearing capacity analysis for existing buildings near excavations is different from the one of general bearing capacity near slope. Those questions are discussed and the shear strength available corresponds to the average between the fully softened and residual shear strength is suggested. According to the idea, relevant bearing capacity for existing buildings near excavations is evaluated; and the results are compared with the test data and the theoretical solutions of bearing capacity near slope. Though present method is appropriate, it should be clarified by test as a strategy in design. |
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| Keywords: | adjacent to excavation existing building foundation soils shear strength index |
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