| 黄土边坡开挖后强度变化规律研究 |
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| 引用本文： | 刘强,谢婉丽,温笃武.黄土边坡开挖后强度变化规律研究[J].地下水,2012(3):208-210. |
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| 作者姓名： | 刘强 谢婉丽 温笃武 |
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| 作者单位： | 西北大学地质学系/大陆动力学国家重点试验室 |
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| 基金项目： | 陕西省教育厅专项科研计划项目(09JK780);国家自然科学基金青年科学基金项目(40502028);长安大学中央高校基本科研业务费专项资金项目(开放基金:CHD2010JC142) |
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| 摘 要： | 在室内对52个原状土样进行卸荷条件下的直剪试验,测定不同先期固结压力下卸荷土体在不同滞留时间的抗剪强度值,试验结果表明:不同先期固结压力下原状土体卸荷后,在相同的卸荷滞留时间下卸荷后土体的抗剪强度随着先期固结压力的增大而增大;当先期固结压力为200 KPa时,土体的抗剪强度是随着滞留时间的增加而减小的,在卸荷5～7 d后强度就不再明显下降。利用试验结果以某高速公路高边坡为研究对象进行了稳定性分析。
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| 关 键 词： | 黄土 开挖 卸荷 强度 稳定性 |
Variation Regulation of Strength in the Loess Slope Excavation |
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| LIU Qiang,XIE Wan-li,WEN Du-wu.Variation Regulation of Strength in the Loess Slope Excavation[J].Groundwater,2012(3):208-210. |
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| Authors: | LIU Qiang XIE Wan-li WEN Du-wu |
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| Institution: | (State key laboratory for Continental Dynamics/Department of Geology,Northwest University,Xi’an710068,Shaanxi) |
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| Abstract: | Direct shear tests under unloading conditions are based on 52 undisturbed soil samples indoor,determination of the shear strength values at different retention time of the unloading soil at different pre-consolidation pressure,the result show that the different pre-consolidation pressure under the status quo-soil unloading,the residence time of the same unloading the shear strength of the soil mass with pre-consolidation pressure increases with increasing soil shear;preconsolidation pressure 200K Paintensity decreases with increasing residence time in the intensity of the 5-7 days of unloading no longer decreased.Test results to study the stability analysis to the high slope of a highway. |
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| Keywords: | Loess excavation to unload strength and stability |
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