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Comparative lab-testing of physical and mechanical properties of soft soil at different sampling diameter
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Affiliation:

Zhejiang Engineering Prospecting Institute,Zhejiang Engineering Prospecting Institute,Zhejiang Engineering Prospecting Institute,Zhejiang Engineering Prospecting Institute

Clc Number:

TU411

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    Abstract:

    Based on Ningbo rail transit Line 4 geotechnical investigation project, comparative lab-testing was conducted on soft soil taken at two different diameters (D= 75mm, D= 100mm)with the open thin wall samplers commonly used in soft soil areas. Based the test results, the differences of indexes of physical and mechanical properties of soft soil at two sampling diameters and their mechanism were analyzed; the additional volumetric strain method was used to analyze and evaluate the disturbance of soil samples at two different diameters. The results show that the water content and void ratio of the soil sample with the diameter of 75mm reduced to a certain extent with the reduction range of 9% compared with the soil sampler with the diameter of 100mm; the density, compressive modulus and shear strength index increased to a certain extent with the increasing of 2% to 21%; the average volumetric strain of soil samples was 6.4% and 6.6% respectively, and the degree of disturbance was very large; the soil samples which were obtained by the large diameter soil sampler was closer to the actual properties of soft soil than the small diameter soil sampler.

    Reference
    [1] 李广信.土力学[M].北京:清华大学出版社,2013
    [2] 高大钊,张少钦,姜安龙等. 取样扰动对土的工程性质指标影响的试验研究[J]. 工程勘察,2006(3): 6-10
    [3] 刘华清,赵春风,高大钊. 取样扰动对土天然强度指标的影响和处理方法[J].岩土工程技术,2002(3):158-162
    [4] 姜安龙,高大钊. 取土器直径对取样扰动的影响分析[J]. 工程勘察,2002(4):13-14
    [5] 王年香,魏汝龙.沿海软粘土取土质量的对比分析[J]. 工程地质学报,1994,2(1),66-75
    [6] 吕海波,宁世朝等. 两种浅海软土的取样质量评价[J]. 土工基础,2006,20(5),75-77
    [7] 邓永锋,刘松玉. 扰动对软土强度影响规律研究[J]. 岩石力学与工程学报,2007,26(9),1940-1944
    [8] 中华人民共和国国家标准.土工试验方法标准(GB/T 50123-1999)[S].北京:中国计划出版社,1999
    [9] 中华人民共和国国家标准.岩土工程勘察规范(2009年版)(GB50021—2001)[S].北京:中国建筑工业出版社,2009
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History
  • Received:July 15,2018
  • Revised:November 01,2018
  • Adopted:November 01,2018
  • Online: January 15,2019
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