Journal of Changjiang River Scientific Research Institute ›› 2019, Vol. 36 ›› Issue (4): 129-134.DOI: 10.11988/ckyyb.20180907

• HE 28TH NATIONAL SYPOSIUM ON GEOTECHNICAL TESTING • Previous Articles     Next Articles

In-situ Test of Soft Soil in Pearl River Delta: Engineering Practices and Effect Analysis of Result Applications

CHEN Fu-qiang1,2,3, YANG Guang-hua1,2,3,4, SUN Shu-kai4, GUAN Da-shu5,6, ZHU Si-jun1,2,3   

  1. 1.Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510635, China;
    2.Geotechnical Engineering Technology Center of Guangdong Province, Guangzhou 510635, China;
    3.Research Center on Emergency Technology of Mountain Torrent Disasters in Guangdong Province, Guangzhou 510635, China;
    4.Department of Civil Engineering, South China University of Technology, Guangzhou 510641, China;
    5.Guangdong Technical College of Water Resources and Electric Engineering, Guangzhou 510925, China;
    6.State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
  • Received:2018-07-17 Revised:2018-09-26 Published:2019-04-01 Online:2019-04-01

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Abstract: 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.

Key words: soft soil engineering, in-situ test, cross plate shear test, shear strength, Pearl River Delta

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