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| 扁铲侧胀试验在浅海钙质土力学特性评价中的应用 | |
| 引用本文： | 孟庆山,黄超强,李晓辉,汪稔,张家铭.扁铲侧胀试验在浅海钙质土力学特性评价中的应用[J].岩土力学,2006,27(5):769-772. |
| 作者姓名： | 孟庆山 黄超强 李晓辉 汪稔 张家铭 |
| 作者单位： | 1. 中国科学院岩土力学重点实验室,武汉,430071 2. 中交第二公路勘察设计研究院,武汉,430052 3. 西藏自治区重点水利建设项目管理中心,拉萨,850000 |
| 基金项目： | 科技部南沙群岛及其邻近海区综合调查项目;科技部社会公益研究专项基金;湖北省自然科学基金;中国科学院科研项目 |
| 摘 要： | 利用扁铲侧胀仪对海底浅层钙质土进行原位测试，能够一次获得多个评价土性的试验参数。试验表明，由于波浪循环动荷载的作用使得海底表层（深1～2 m）钙质砂的密实度比其紧邻的下部偏大，以珊瑚礁为主要胶结物的钙质土，内部具有大的孔隙或松散堆积体结构是造成海底浅层钙质砂表层与浅部土体的扁铲侧胀压力明显变化的主要原因。扁铲试验结果与现场标准贯入试验具有较好的相关性，基于Seed公式推导的适合于计算水下平均动应力比的简化公式能够较好地用于对不同地震烈度下海底浅层钙质土液化可能性的判别。 |
| 关 键 词： | 扁铲侧胀试验 钙质土 原位测试 力学特性 |
| 文章编号： | 1000-7598-（2006）05-0769-04 |
| 收稿时间： | 2004-09-13 |
| 修稿时间： | 2004-09-132005-04-12 |
Application of flat dilatometer test to mechanical characteristics evaluation of calcareous soil in shallow water |
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| MENG Qing-shan,HUANG Chao-qiang,LI Xiao-hui,WANG Ren,ZHANG Jia-ming.Application of flat dilatometer test to mechanical characteristics evaluation of calcareous soil in shallow water[J].Rock and Soil Mechanics,2006,27(5):769-772. | |
| Authors: | MENG Qing-shan HUANG Chao-qiang LI Xiao-hui WANG Ren ZHANG Jia-ming |
| Institution: | 1.Key Laboratory of Rock and Soil Mechanics, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. China Communications Second Highway Survey, Design & Research Institute, Wuhan 430052, China; 3. Management Center of Major Projects of Water Conservancy Construction, Tibet Autonomous Region, Lhasa 850000, China |
| Abstract: | Several experimentation parameters which for evaluating soil indexes were obtained based on the flat dilatometer test of calcareous soil in shallow water. The reasons of the calcareous soil density at surface layer in shallow water is bigger than that of deep-sited soil are not only the wave cycle dynamic loading, but also because calcareous soil were made of coral reef cementation material; and it has big pore and relax deposit material. So the flat dilatometer pressure is obviously different between surface layer calcareous soil and that of deep-sited soil. Also it has preferable correlativity between flat dilatometer test results and on-site standard penetration test results. Liquefaction estimation of calcareous soil in shallow water under different earthquake intensity can be obtained utilizing Seed simplified eouafion which is fit for calculating under-water mean dynamic stress ratio. |
| Keywords: | flat dilatometer test(DMT) calcareous soil in-situ testing mechanical characteristics |
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