| 南京河西地区软土卸荷状态下的强度特性研究 |
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| 引用本文： | 侯晓亮,赵晓豹,李晓昭,周建华.南京河西地区软土卸荷状态下的强度特性研究[J].工程勘察,2011(10):14-18,79. |
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| 作者姓名： | 侯晓亮 赵晓豹 李晓昭 周建华 |
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| 作者单位： | 南京大学—华东有色地勘局地下空间与地质环境研究所;南京大学地球科学与工程学院;合肥工业大学资源与环境工程学院; |
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| 基金项目： | 合肥工业大学校基金(2009HGXJ0060) |
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| 摘 要： | 以大量的室内抗剪强度试验为基础,分析了南京河西地区软土深基坑开挖时,坑底被动区土体在卸荷条件下的抗剪强度变化规律。通过研究分析表明：坑底被动区土体在卸荷状态下的抗剪强度指标和加荷状态下差别明显,有一定的残留强度;土体卸荷时抗剪强度受卸荷比的影响明显;随着卸荷滞留时间的延长,初期土体抗剪强度损失明显,后期逐渐不显著。最后...
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| 关 键 词： | 卸荷 强度残留率 软土 深基坑 抗剪强度 |
Study on shear strength of the soft soil in Nanjing Hexi under unloading state |
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| Hou Xiaoliang ,Zhao Xiaobao ,Li Xiaozhao ,Zhou Jianhua.Study on shear strength of the soft soil in Nanjing Hexi under unloading state[J].Geotechnical Investigation & Surveying,2011(10):14-18,79. |
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| Authors: | Hou Xiaoliang Zhao Xiaobao Li Xiaozhao Zhou Jianhua |
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| Affiliation: | Hou Xiaoliang 1,2,Zhao Xiaobao 1,Li Xiaozhao 1,Zhou Jianhua 1(1.NJU-ECE Institute for Underground Space and Geo-environment,School of Earth Science and Engineering,Nanjing University,Nanjing 210093,China,2.Institute of Resources and Environment Engineering,Hefei University,Hefei 230009,China) |
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| Abstract: | Through a lot of direct shearing tests,the strength variation of the soft soils in passive areas under the unloading condition was analyzed when the deep pit in the soft soil was excavated in Nanjing Hexi.The results show that the indices of shear strength have the clear differences under the conditions of unloading or loading and there is some residual strength in soil samples.The shear strength under unloading condition is affected greatly by the unloading ratio.With the increase of the residence time,the... |
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| Keywords: | unloading residual strength rate soft soil deep excavation shear strength |
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