| 公路软基超载预压卸荷时间确定的沉降速率法研究 |
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| 引用本文： | 杨涛,李国维.公路软基超载预压卸荷时间确定的沉降速率法研究[J].岩土工程学报,2006,28(11):1942-1946. |
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| 作者姓名： | 杨涛 李国维 |
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| 作者单位： | 上海理工大学城市建设与环境工程学院；河海大学岩土工程研究所 上海200093；江苏南京210098； |
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| 摘 要： | 推导出了超载沉降速率与等载工后沉降之间的关系式。该式表明,超载沉降速率控制标准不仅取决于允许的工后沉降,而且与土的固结性质、各级荷载增量的加荷速率和加荷起讫时间有关。基于分级加荷沉降预测理论,建立了超载卸荷时间快速预报方法。最后通过一工程实例,验证了方法的适用性。
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| 关 键 词： | 超载 预压 沉降速率 卸荷时间 |
| 文章编号： | 1000-4548（2006）11-1942-05 |
| 收稿时间： | 2005-09-13 |
| 修稿时间： | 2005-09-13 |
Settlement rate method for determining surcharge removal time for embankment on soft ground |
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| YANG Tao,LI Guo-wei.Settlement rate method for determining surcharge removal time for embankment on soft ground[J].Chinese Journal of Geotechnical Engineering,2006,28(11):1942-1946. |
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| Authors: | YANG Tao LI Guo-wei |
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| Affiliation: | 1.College of Urban Construction and Environment Engineering University of Shanghai for Science and Technology Shanghai 200093 China 2.Research Institute of Geotechnical Engineering Hohai University Nanjing 210098 China |
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| Abstract: | Preloading with surcharge is the most common technique of ground improvement used in highway engineering. An equation describing the relationship between the settlement rate during preloading with surcharge and the post-construction settlement under the conditions of equal loads was derived. The equation revealed that the control values of settlement rate under the conditions of overloading depended on not only the allowed post-construction settlements, but also the consolidation property of soil, the loading rate and the beginning and the end time for all load increments. By means of the theory of settlement prediction for stage constructed embankment on soft ground, the procedure to forecast the surcharge removal time was established. Finally, a case history was analyzed to verify the use of the proposed method. |
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| Keywords: | surcharge preloading settlement rate unloading time |
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