| 水泥土强度室内与芯样试验结果对比分析 |
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| 引用本文： | 许崧,阎长虹,夏文俊,赵阳.水泥土强度室内与芯样试验结果对比分析[J].地质灾害与环境保护,2012,23(3):64-67. |
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| 作者姓名： | 许崧 阎长虹 夏文俊 赵阳 |
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| 作者单位： | 1. 南京大学地球科学与工程学院,南京,210093
2. 江苏省交通工程建设局,南京,210093 |
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| 基金项目： | 2008年度高等学校科技创新工程重大项目培育资金项目(708043) |
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| 摘 要： | 连临高速路江苏段地基土层为滨海相软土,路基采用水泥土搅拌桩加固.现场取土进行室内水泥土改性试验发现,水泥土强度随水泥掺量和龄期的增加而增大.现场水泥土搅拌桩抽芯样试验发现,相同龄期条件下,水泥土室内试验强度一般要比抽芯样强度高0.2至0.8兆帕.两种实验中,该地基第一层土的水泥土强度均大于第二层土,表明土层性质对水泥土强度影响很大.受搅拌不均匀影响,芯样试验强度比较离散,随芯样夹土厚度增加,水泥土芯样波速和强度下降.
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| 关 键 词： | 连临高速 搅拌桩 水泥土强度 芯样 |
COMPARING THE RESULTS OF INDOOR AND CORE SAMPLE EXPERIMENTS WITH CEMENT-SOIL STRENGTH |
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| Xu Song
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Yan Chang-hong
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Xia Wen-jun
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Zhao Yang.COMPARING THE RESULTS OF INDOOR AND CORE SAMPLE EXPERIMENTS WITH CEMENT-SOIL STRENGTH[J].Journal of Geological Hazards and Environment Preservation,2012,23(3):64-67. |
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| Authors: | Xu Song Yan Chang-hong Xia Wen-jun Zhao Yang |
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| Institution: | 1.School of Earth Science & Engineering of Nanjing University,Nanjing 210093,China; 2.Headquarters of Highway of Jiangsu,Nanjing 210093,China) |
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| Abstract: | The foundation of the Jiangsu section of the Lianlin highway is made up of marine soft soil.It is strengthened by cement mixing piles.The indoor modification experiment results indicate that the strength of cement-soil increases with the mixed cement amount and age.With the same age,the cement-soil strength in the indoor experiment is bigger by 0.2~0.8 MPa than that in the core sample test.The results also show the nature of soil layers has great influence on the strength of cement-soil.Under the influence of uneven mixing,the strength of the core samples is very discrete,their strength and wave velocity decrease as the thickness of the intercalated soil increases. |
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| Keywords: | Lian-lin highway mixing cement pile strength of cement-soil core sample |
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