淮河方邱湖大堤地质勘察与空间结构分析  

A geologic survey and spatial structure analysis of Fang Qiu Hu dike along the Huaihe River

作　　者：何秉顺[1] 王玉杰[2] 孙东亚[1] 

机构地区：[1]中国水利水电科学研究院防洪抗旱减灾研究所,北京100038 [2]中国水利水电科学研究院岩土工程研究所,北京100048

出　　处：《中国水利水电科学研究院学报》2010年第2期114-120,共7页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家科技支撑计划(2006BAC05805)

摘　　要：利用RI型静力触探设备,对淮河方邱湖段堤防进行了地质勘察,提出了堤防各土层大量物理与力学指标,并通过钻孔取土室内试验与常规静力触探对测试数据进行了对比验证。在地质勘察分层的基础上,利用地质统计学理论,对锥尖阻力、摩阻比、干密度、孔隙比4参数进行了空间结构分析,发现球形模型可较好模拟堤身、堤基土层参数空间变异性,土层顺堤轴线方向变程在30～50m之间,深度方向变程在0.2～0.8m之间。物理指标变程略小于强度指标,与多数文献提供的变程范围一致,该分析结果为进一步的土工参数估值与模拟提供了基础依据。The RI type cone penetration test （CPT） equipment was adopted in a geologic survey at Fang Qiu Hu dike, along the Huaihe River. Sets of data of physical and mechanical parameters of the dyke material were collected. The data were tested by means of the traditional CPT approach and also in indoor test on bored soil, and they were compared and verified. Based on the geostatistics theory, a spatial structure analysis was performed in terms of the cone resistance, sleeve frictional ratio, dry density and void ratio. The result revealed that the spherical model was better to well simulate the spatial variability of the soil in both dike body and dike foundation. The range of soil parameters along the dike axis is 30m to 50m, and the range along the depth direction is about 0.2m to 0.8m. The range of physical parameters is a little smaller than that of the strength parameters, this is in accordance with most references. The result would provide a fundamental basis for future estimation and simulation of soil parameters.

关 键 词：地质勘察 静力触探 变程 地质统计学 

分 类 号：TV871[水利工程—水利水电工程]