Spatial heterogeneity of engineering properties of Zhuhai soft soils
SONG Xu-gen1, WANG Zhi-yong1, BAI Wei-wei1, WANG Zhe1, XIE Shu-meng1, XIA Kai-zong2
1. Institute of Road Planning and Design, China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, China; 2. Stake Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
Abstract：The physical and mechanical parameters of soft soils are the fundamental basis for the design of soft roadbeds. Based on the analysis of amounts of test data in the central area of western Zhuhai, the distribution of soft soils and the laws of spatial anisotropy of parameters are discussed. The distribution contour map of the soft soils is obtained. The pre-consolidation pressure and the unconfined compressive strength increase with depth. The sensitivity and organic matter content are not affected by the change of depth. The water content, liquid limit, plastic limit and plasticity index changing with depth increase first and then decrease. The laws of direct shear strength indexes changing with depth are opposite to those with the water content, liquid limit and plastic limit, and they decrease first and then increase. The results of the in-situ tests are consistent with those obtained by the laboratory experiments, and there are also differences. When using the intensity indexes of laboratory experiments in design, the in-situ test results should be referred to.
宋许根, 王志勇, 柏威伟, 王哲, 谢书萌, 夏开宗. 珠海软土工程特性空间异性规律研究[J]. 岩土工程学报, 2019, 41(S1): 25-28.
SONG Xu-gen, WANG Zhi-yong, BAI Wei-wei, WANG Zhe, XIE Shu-meng, XIA Kai-zong. Spatial heterogeneity of engineering properties of Zhuhai soft soils. Chinese J. Geot. Eng., 2019, 41(S1): 25-28.
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