| 广州市南沙区软土物理力学指标统计分析 |
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| 引用本文： | 姜燕,杨光华,孙树楷,贾恺,李泽源. 广州市南沙区软土物理力学指标统计分析[J]. 长江科学院院报, 2019, 36(9): 99-103. DOI: 10.11988/ckyyb.20171485 |
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| 作者姓名： | 姜燕 杨光华 孙树楷 贾恺 李泽源 |
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| 作者单位： | 广东省水利水电科学研究院,广州510610;广东省岩土工程技术研究中心,广州510610;华南理工大学土木与交通学院,广州,510641 |
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| 基金项目： | 国家自然科学基金项目(51778152);广东省水利科研及技术推广项目(2005-06) |
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| 摘 要： | 根据广州市南沙区实际工程中收集到的共计299组软土试验成果,针对软土不同含水率区间,对南沙区软土基本物理力学指标进行了分区统计和分析,给出了软土强度指标、变形指标与含水率的关系,并与珠海横琴新区软土的相关力学特性进行了对比分析。结果表明:在相同含水率情况下,横琴新区软土压缩模量、直接快剪黏聚力、直接快剪内摩擦角等指标均低于南沙区软土指标,横琴新区软土指标相对更差;随含水率的增加,南沙区与横琴新区软土的压缩模量、直接快剪黏聚力呈较一致的递减趋势;直接快剪内摩擦角呈不同的变化趋势,南沙区软土直接快剪内摩擦角呈上下波动的趋势,无明显增减规律,横琴新区软土直接快剪内摩擦角指标呈递减趋势。研究结果给出了不同含水率区间软土指标的统计范围,可供南沙区及横琴新区的软土工程设计与施工参考或借鉴。
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| 关 键 词： | 软土 强度指标 变形指标 含水率 南沙区 横琴新区 统计分析 |
| 收稿时间： | 2017-12-25 |
| 修稿时间： | 2018-04-03 |
Statistic Analysis of Physical and Mechanical Indexes of Soft Soil in Nansha of Guangzhou City |
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| JIANG Yan,YANG Guang-hua,SUN Shu-kai,JIA Kai,LI Ze-yuan. Statistic Analysis of Physical and Mechanical Indexes of Soft Soil in Nansha of Guangzhou City[J]. Journal of Yangtze River Scientific Research Institute, 2019, 36(9): 99-103. DOI: 10.11988/ckyyb.20171485 |
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| Authors: | JIANG Yan YANG Guang-hua SUN Shu-kai JIA Kai LI Ze-yuan |
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| Affiliation: | 1.Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China;2.Geotechnical Engineering Technology Center of Guangdong Province, Guangzhou 510610, China;3.School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China |
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| Abstract: | According to a total of 299 sets of soft soil test results collected from actual projects in Nansha District of Guangzhou, the basic physical and mechanical indexes of soft soil in Nansha are analyzed and classified corresponding to different moisture content intervals of soft soil. The relationships of strength index and deformation index against moisture content of soft soil are given and the results are compared with those of soft soil in Hengqin area, Zhuhai City. Results reveal that at given moisture content, the compressive modulus, direct shear cohesion and direct shear internal friction angle of soft soil from Hengqin are lower than those from Nansha, indicating that the indexes of soft soil in Nansha are superior. With the increase of moisture content, the compressive modulus and direct shear cohesion of soft soils both from Nansha and Hengqin display a consistent decreasing trend; however, direct shear internal friction angle exhibits different trends — direct shear internal friction angle of soft soil from Nansha fluctuates with no obvious reduction, while that from Hengqin declines evidently. In addition, the statistical ranges of soft soil indexes in different moisture content intervals are also given for reference for soft soil engineering design in Nansha and Hengqin. |
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| Keywords: | soft soil strength index deformation index moisture content Nansha District Hengqin of Zhuhai statistical analysis |
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