区域土体膨胀率空间变异特征分析与三维模拟

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摘要以土体膨胀率空间变异特征的定量分析为目标，利用收集到的钻孔资料和土样数据，分析合肥市滨湖新区土体膨胀率不同尺度、各向异性的变异规律；并以泛克里金方法为映射工具，在GSIS2.0平台上完成研究区膨胀率属性三维空间变异模型的构建；分析结果的有效性和正确性通过交叉验证的方法进行检验。在此基础上，结合滨湖新区气候变化规律和水系分布特征，对整个区域三维地下空间的膨胀土危害的强弱进行定量分析和评价，指明进行地下空间规划和开发所需采取的措施。研究结果表明，地质环境属性变异特征的三维分析与模拟是地下空间科学规划和开发的一种有效、科学、直观的方法体系，也是实现地质环境条件定量分析和评价的有效手段。

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关键词 ：土力学, 空间变异, 泛克里金方法, 变异函数, 地质属性模拟, 土体膨胀率

Abstract：Goal is to analysis and model the spatial variability of soil expansive property quantitatively. With the collected data of boreholes and soil samples，the spatial variability patterns of soil expansibility of Binhu District，Hefei City，are explored in different direction and scale. And then，the three-dimensional expansibility variation model is constructed by using universal Kriging method as the mapping tool through GSIS2.0. Analysis results are validated by cross-validation method. Based on the above results，taking the local weather and distribution of water system into account，quantitative analysis and assessment of potential hazard from expansive soil are performed and some suggestions were proposed for civil planning and developing of the underground space. The research showed that three-dimensional analysis and modeling of subsurface geological environmental attributes is an effective，scientific，intuitive methodology for underground space planning and development，and it is also an effective mean for the attributes? quantitative analysis and assessment.

Key words： soil mechanics spatial variability universal Kriging variogram geological property modeling soil expansibility

收稿日期: 2010-11-17

引用本文:

金毅1，2，平瑞1，潘懋2，乔金海2. 区域土体膨胀率空间变异特征分析与三维模拟[J]. 岩石力学与工程学报, 2011, 30(S2): 3811-3819.
JIN Yi1，2，PING Rui1，PAN Mao2，QIAO Jinhai2. ANALYSIS AND 3D MODELING OF REGIONAL SOIL EXPANSIBILITY?S SPATIAL VARIABILITY. , 2011, 30(S2): 3811-3819.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/IS2/3811

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