| 郝冬雪,陈榕,栾茂田,武科.自钻式旁压试验推求土性参数的研究进展[J].计算力学学报,2011,28(3):452~460 |
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| 自钻式旁压试验推求土性参数的研究进展 |
| Research development of estimation for soil properties from SBPT |
| 投稿时间：2010-01-23 修订日期：2010-05-04 |
| DOI：10.7511/jslx201103025 |
| 中文关键词: 自钻式旁压试验 柱孔扩张理论 土性参数 误差来源分析 本构模型参数 |
| 英文关键词:SBPT cylindrical cavity expansion parameters of soil property inaccuracy analysis model parameters |
| 基金项目:电力青年科技创新项目(2011); 东北电力大学博士科研启动基金(BSJXM-200917); 河海大学岩土力学与堤坝工程教育部重点实验室开放基金(GH200803); 中国博士后科学基金(200904501211)资助项目. |
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| 中文摘要: |
| 自钻式旁压试验(SBPT)因其具有扰动小,能同时测量土体应力、应变及孔隙水压力的变化,在确定地基土性参数上有广阔的应用前景,成为岩土工程测试中利用率最高的原位测试手段之一。由于试验挤土过程与孔扩张过程具有很好的相似性,故多采用柱形孔扩张理论对旁压试验机理进行分析。本文详细阐述了SBPT力学机理分析的难点及假设条件适用性,并以Yu一文为基础,总结了SBPT推求土性参数及本构模型参数的理论分析方法、土性参数估测的误差来源与误差修正研究,为SBPT在国内广泛应用提供理论参考,最后对SBPT的机理解释及应用研究趋势进行了讨论。 |
| 英文摘要: |
| Self-boring pressuremeter test (SBPT) has been effectively utilized to determine in-situ properties of soils and is one of the most potential in-situ tests in international geomechanical field because it can overcome disturbance for soil to a large extent during boring and obtain the data of stress, strain and pore pressure simultaneously. The process of soil-squeezing is similar to cylindrical cavity expansion so that most of interpretation for SBPT is based on the theory of cavity expansion. This paper illuminates the difficulties of theoretical analysis of SBPT, reviews and evaluates the current use of fundamental mechanics in developing rational interpretation methods for deriving soil properties and soil constitutive model parameters from in situ test results, possible sources of inaccuracy and corrections based on Yu’s review. It is expected to provide reference and guidance for wide application of SBPT in China. Also, some research trends in the field are discussed. |
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