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| Study on the Random Field Characteristics of Soil Parameters for Jiangmen South Station of Coastal Railway in West Guangdong |
| WANG Ying-he |
| China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan, Hubei 430002, China |
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Abstract Research purposes：In the area of Jiangmen South Station of coastal railway in western part of Guangdong Province, there is a thick layer of soft soil mainly with silt clays and partially with gravel inter layer due to the alluvion by sea and land in Tanjiang estuary. In order to meet the requirements of bearing capacity and post-construction settlement, the foundation base of subgrade must be reinforced into composite foundation. The proper selection of soil parameters is crucial to the design of composite foundation. As the soil body has been formed under natural condition, the soil has a great variability in characteristics. Thus, it is reasonable to use the probability method to design the composite foundation. The study on the random field characteristics of soil parameters can provide the basis for design of the composite foundation with probability method. This paper studies the random field characteristics of soil parameters for Jiangmen South Station with the CPT data.
Research conclusions：The main reduction functions of variance of the main soil layers are obtained with systematic random field method. The average value and variance of compression modulus, bearing capacity and shear strength index are obtained with statistics. The reduction function of variance is used to modify the variance.
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Received: 18 November 2009
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[ 1 ] BEACHER G. Need for probabilistic characterization[C]//Prob Characterization of Soil Properties: Bridge Between Theory & Practice, New York, 1984:1 - 18.
[ 2 ] Vanmarcke, Erik H. Probabilistic Modeling of soil profiles. American Society of Civil Engineers, Journal of the Geotechnical Engineering Division, 1977 ( 11 ) :1227 - 1246.
[ 3 ] Fen ton, Gordon A. Vanmarcke, Erik H. Random field characterization of NGES data. Geotechnical Special Publication, n 121 SPEC., 2003: 61 - 78.
[ 4 ] Phoon, K. K. & Kulhawy, F. H. Characterization of geotechnical variability [J]. Canadian geotechnical Journal, 1999, 36: 612 - 624.
[ 5 ] Phoon, K. K. & Kulhawy, F. H. Evaluation of geotechnical property variability[ J]. Canadian geotechnical Journal, 1999, 36: 625 - 639.
[ 6 ] G. L. Sivakumar Babu, Am it Sriva stava, D. S. N. Murthy. Reliability analysis of the bearing capacity of a shallow foundation resting on cohesive soil [J]. Can. Geotech. 2006, 43: 217 - 223.
[ 7 ] M. UZ IELLI, G. VANNUCCHI, K. K. PHOON. Random field characteristic of stress-normalised cone penetration testing parameters[J]. Geotechnique, 2005( 1) : 3 - 20.
[ 8 ] 高新强 , 窦建平 , 张会斌. 静力触探曲线中异常数据的处理方法 [ J ]. 石家庄铁道学院学报 , 2002 (8) : 8 - 11.
Gao Xin-qiang, Du Jian-ping, Zhang Hui-bin. Mehod of Processing Abnormal Data of CPT Curve[J]. Journal of shijiazhuang Raiway Instutude, 2002(8): 8-11.
[ 9 ] Phoon, K K, Quek, S. T. & An, P. Identification of statistically homogenous soil layers using modified Bartlett statistics, J. Geotech. Geoenviron. Engng, 2003( 7) : 649 - 659.
[ 10 ] 汪莹鹤 , 王保田 , 安彦勇. 基于 CPT资料的土性参数随机场特性研究 [J]. 岩土力学 , 2009( 9) : 2753 - 2758.
Wang Yinghe, Wang Bao-tian, An Yan-yong. Study on the Random Field Characteristic of soil Parameter Based on CPT Measurements[J]. Rock and Soil Mechnics, 2009( 9) : 2753 - 2758.
[ 11 ] 闫澍旺 , 朱红霞 , 刘润. 关于随机场理论在土工可靠度计算中应用的研究 [J ]. 岩土工程学报 , 2006 (12) : 2053 -2059.
Yan Shu-wang, ZHU Hong-xia, L IU Run. Study on Application of Random Field Theory to Reliability Analysis[J]. Chinese Journal of Geotechnical Engineering, 2006( 12) : 2053 - 2059.
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2010, Vol. 27 
