| 考虑桩身力学性能变化的复合地基沉降分析 |
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| 引用本文： | 杨奇斌,徐超.考虑桩身力学性能变化的复合地基沉降分析[J].勘察科学技术,2010(1). |
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| 作者姓名： | 杨奇斌 徐超 |
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| 作者单位： | 同济大学岩土及地下工程教育部重点实验室,上海市,200092 |
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| 摘 要： | 水泥搅拌桩复合地基作为处理软粘土地基一种有效方法,在常规的复合地基沉降计算时,假定搅拌桩的力学性能沿桩身是不变的。但从实际工程中桩身质量检测发现,桩身的力学性能沿深度是变化的,埋置越深强度和模量越低。结合204国道改造工程常熟段的工况和工程地质条件,在水泥搅拌桩桩身检测成果基础上,考虑水泥搅拌桩桩身压缩模量随深度变化的特点,对水泥土搅拌桩复合地基沉降分析方法进行了改进,与传统计算方法相比,新方法的计算结果更接近实际情况。
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| 关 键 词： | 水泥搅拌桩 复合地基 沉降计算 桩身力学特性 |
Composite Foundation Settlement Analysis Considering the Variation of Mechanical Properties of Soil-cement Mixing Column |
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| Yang Qibin,Xu Chao.Composite Foundation Settlement Analysis Considering the Variation of Mechanical Properties of Soil-cement Mixing Column[J].Site Investigation Science and Technology,2010(1). |
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| Authors: | Yang Qibin Xu Chao |
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| Affiliation: | Key Laboratory of Geotechnical Engineering and Underground Engineering of Ministry of Education;Tongji University |
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| Abstract: | Cement mixing composite foundation is an effective method dealing with soft foundation soil.It is assumed in the conventional calculation of composite foundation settlement that the mechanical properties of soil-cement mixing column are constant with depth.But these properties change with column depth as discovered in the column quality tests of practical projects,and show that the strength and modulus of column decrease with increasing depth.Under the geological engineering conditions of national road 204 ... |
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| Keywords: | cement mixing column composite foundation settlement calculation mechanical properties of column |
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