珠三角软土原位测试的工程实践及成果应用效果分析

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英文篇名：In-situ Test of Soft Soil in Pearl River Delta: Engineering Practices and Effect Analysis of Result Applications 作者：陈富强 ; 杨光华 ; 孙树楷 ; 官大庶 ; 朱思军 英文作者：CHEN Fu-qiang;YANG Guang-hua;SUN Shu-kai;GUAN Da-shu;ZHU Si-jun;Guangdong Research Institute of Water Resources and Hydropower;Geotechnical Engineering Technology Center of Guangdong Province;Research Center on Emergency Technology of Mountain Torrent Disasters in Guangdong Province;Department of Civil Engineering, South China University of Technology;Guangdong Technical College of Water Resources and Electric Engineering;State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology; 关键词：软土工程 ; 原位测试 ; 十字板剪切试验 ; 抗剪强度 ; 珠三角地区 英文关键词：soft soil engineering;;in-situ test;;cross plate shear test;;shear strength;;Pearl River Delta 中文刊名：CJKB 英文刊名：Journal of Yangtze River Scientific Research Institute 机构：广东省水利水电科学研究院;广东省岩土工程技术研究中心;广东省山洪灾害突发事件应急技术研究中心;华南理工大学土木工程系;广东水利电力职业技术学院;中国矿业大学深部岩土力学与地下工程国家重点实验室; 出版日期：2019-01-31 11:49 出版单位：长江科学院院报 年：2019 期：v.36;No.246 基金：国家自然科学基金项目(51778152);; 广东省省级科技计划项目(2014B070706008) 语种：中文; 页：CJKB201904029 页数：6 CN：04 ISSN：42-1171/TV 分类号：133-138

摘要

为了扩大原位测试技术在珠三角软土工程中的应用和验证用十字板剪切试验推算软土的抗剪强度指标计算方法的可行性,以珠海某软土填方边坡和广州南沙某基坑工程中软土原位测试与工程应用为例,开展了原位测试结果与室内指标的对比分析和成果应用效果分析。结果表明:原位测试能较好地反映软土的实际状态,用十字板剪切试验推算的软土抗剪强度参数值大于室内土工试验得到的参数值;在珠三角地区用《港口工程地基规范》(JTS 147-1—2010)中附录J方法推算得到的软土的黏聚力偏大,超出经验范围值,所以尚不宜直接用于工程设计。建议进一步对原位测试数据的应用开展相关理论研究,以扩大应用范围。
        In order to expand the application of in-situ testing technology in soft soil projects in the Pearl River Delta and to verify the feasibility of using cross plate shear test result to calculate the shear strength of soft soil, we compared in-situ test results with indoor test results, and analyzed the application effects. We took the in-situ test and its engineering application in a soft soil fill slope in Zhuhai and a foundation pit engineering in Nansha, Guangzhou as engineering examples. Results unveil that in-situ test could well reflect the actual state of soft soil, and the shear strength parameter of soft soil calculated via vane shear test result is greater than those obtained by laboratory soil test. However,in Pearl River Delta region, the cohesion of soft soil calculated by method in Appendix J of Code for Foundation of Port Engineering(JTS 147-1—2010) exceeds empirical range, hence is not suitable for direct use in engineering design. We suggest that further theoretical research on the application of in-situ test data should be conducted to expand its application scope.

引文

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