| 膨胀土边坡在干湿循环作用下的稳定性分析 |
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| 引用本文： | 左人宇,邓刚,陈锐,韩曦词,陆钊.膨胀土边坡在干湿循环作用下的稳定性分析[J].路基工程,2016,0(4):166-170. |
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| 作者姓名： | 左人宇 邓刚 陈锐 韩曦词 陆钊 |
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| 作者单位： | 1.深圳市工勘岩土集团有限公司岩土工程设计所 , 广东深圳 518026 |
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| 基金项目： | 深圳市科技研发资金（CXZZ20120829154820942） |
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| 摘 要： | 针对南阳膨胀土边坡在干湿循环下的稳定性会产生较大变化，运用Geo-Studio软件进行数值模拟，定量研究了该膨胀土边坡的水分运移和稳定问题。首先使用SEEP/W模块对膨胀土边坡的水分运移进行模拟，然后基于SEEP/W计算的孔隙水压力结果，采用SLOPE/W对各个重要工况的安全系数进行计算。研究结果表明:孔隙水压力对干湿循环的响应较为迅速，呈现明显的往复循环，但在干燥过程中边坡底部土体响应存在一定滞后性。同时，膨胀土边坡的安全系数随着干湿循环次数的增加而非线性减小，在干湿循环五次后最终减至0.6。
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| 关 键 词： | 膨胀土边坡 干湿循环 Geo-Studio 孔隙水压力 安全系数 |
| 收稿时间： | 2019-11-09 |
Stability Analysis of Expansive Soil Slope under Dry-wet Cycles |
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| Abstract: | As the stability of expansive soil slope in Nanyang has significant change under dry-wet cycles, the Geo-Studio software is adopted to do numerical simulation to quantitatively study the moisture movement and stability problems of expansive soil slope. Firstly, the SEEP/W module is adopted to simulate the moisture movement of expansive soil slope, and then, based on pore water pressure calculated by SEEP/W, the SLOPE/W is adopted to calculate safety factors for all important working conditions. The research result shows that the pore water pressure has quick response to dry-wet cycles and presents obvious reciprocating cycle. However, in the drying process, the slope soil response has certain hysteresis nature. Meanwhile, the safety factor of expansive soil slope decreases with the increase of dry-wet cycles nonlinearly. After five dry-wet cycles, it’s finally reduced to 0.6. |
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