| 深圳软土变形特性与工后沉降 |
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| 引用本文： | 张惠明,徐玉胜,曾巧玲.深圳软土变形特性与工后沉降[J].岩土工程学报,2002,24(4):509-514. |
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| 作者姓名： | 张惠明 徐玉胜 曾巧玲 |
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| 作者单位： | 铁道部科学研究院深圳研究设计院；北方交通大学 广东深圳518034；广东深圳518034；北京100044； |
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| 摘 要： | 根据软基处理工程实测资料研究深圳软土的固结变形特性 ,给出了深圳粘土卸载后的次固结系数的计算式。结合一系列次固结试验提出了卸除超载后软基在永久荷载下的工后沉降的分析方法。结果表明 ,对于深圳软土 ,室内试验得到的固结系数和压缩指数与实测推算的相关指标是相近的。超载预压通过减小次固结系数和推迟次固结发生时间来减少一定时间内软基的次固结沉降
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| 关 键 词： | 软土 工后沉降 现场试验 压缩指数 固结系数 次固结变形 |
| 文章编号： | 1000-4548(2002)04-0509-06 |
| 修稿时间： | 2001年9月20日 |
Deformation behavior of Shenzhen soft clay and post-construction settlement |
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| ZHANG Huiming,XU Yusheng,ZENG Qiaoling.Deformation behavior of Shenzhen soft clay and post-construction settlement[J].Chinese Journal of Geotechnical Engineering,2002,24(4):509-514. |
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| Authors: | ZHANG Huiming XU Yusheng ZENG Qiaoling |
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| Affiliation: | 1.Shenzhen Research and Design Institute China Academy of Railway Sciences Shenzhen 518034 China 2.North Jiaotong University Beijing 100044 China |
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| Abstract: | Based on the field data measured from several projects of soft ground improvement in Shenzhen city,as well as the test data from a serial of tests of secondary compression on the soft clay,the behavior of consolidation and deformation of Shenzhen soft clay was studied and a method to estimate the post construction settlement and the equation to estimate the coefficient of secondary compression after the removal of surcharge are proposed.It was found that its coefficient of consolidation and compression index obtained from lab are close to that calculated from the field data.Surcharge can reduce the secondary settlement of a soft foundation by decreasing the coefficient of secondary compression and by delaying the occurrence of secondary compression. |
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| Keywords: | soft clay post construction settlement field test compression index coefficient of consolidation secondary compression |
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