叶新—大叶公路路基土抗剪强度试验研究
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摘要
为保障叶新—大叶公路改造工程的顺利进行,以压实度和初始含水率作为试验分组依据,对叶新-大叶公路路基粉质粘土开展直接剪切试验。试验结果表明:初始含水率越高,路基土的抗剪强度越差,当初始含水率处于27%～29%时,初始含水率的改变对抗剪强度影响最大;压实度越高,路基土抗剪强度越好,当初始压实度处于90%～94%时,压实度的改变对抗剪强度影响最大。试验结果以及结论可为叶新-大叶公路改造工程的设计和施工提供参考。
In order to guarantee the smooth reconstruction project of Yexin-Daye Highway, taking the compactness and initial water content as the grouping basis of test, the direct shear test is carried out for the silt clay of the subgrade of Yexin-Daye Highway. The test results show that the higher the initial water content is, the worse the shear strength of subgrade soil is. The change of initial water content has the largest impact on the shear strength when the initial water content is in 27%～29%. The higher the compactness is, the better the shear strength of subgrade soil is. The change of compactness has a largest impact on the shear strength when the initial compactness is in 90%～94%. The test result and conclusion can be referred for the design and construction of Yexin-Daye Highway Reconstruction Project.
In order to guarantee the smooth reconstruction project of Yexin-Daye Highway, taking the compactness and initial water content as the grouping basis of test, the direct shear test is carried out for the silt clay of the subgrade of Yexin-Daye Highway. The test results show that the higher the initial water content is, the worse the shear strength of subgrade soil is. The change of initial water content has the largest impact on the shear strength when the initial water content is in 27%～29%. The higher the compactness is, the better the shear strength of subgrade soil is. The change of compactness has a largest impact on the shear strength when the initial compactness is in 90%～94%. The test result and conclusion can be referred for the design and construction of Yexin-Daye Highway Reconstruction Project.
引文
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[2]王宇辉,张强,施风英,等.上海奉贤区淤泥质粉质粘土工程性质指标的统计分析[J].土工基础,2009,23(1):29-31.
[3]董建国,李蓓,袁聚云,等.上海浅层褐黄色粉质粘土剪切带形成的试验研究[J].岩土工程学报,2001(1):23-27.
[4]祝艳波.宜巴高速公路巴东组软岩碎屑土夹层的非饱和特性研究[D].北京:中国地质大学,2014.
[5]骆圣明.非饱和粉质粘土抗剪强度特性试验研究及其对边坡稳定性的影响分析[D].浙江杭州:浙江工业大学,2012.
[6]张存根,张怀静.粉质粘土含水量与抗剪强度参数关系的试验研究[J].华北科技学院学报,2011,8(2):27-29.
[7]王丽,梁鸿.含水率对粉质粘土抗剪强度的影响研究[J].内蒙古农业大学学报(自然科学版),2009,30(1):170-174,195.