Climate-Controlled Soil Design Parameters for Mat Foundations
Climate-Controlled Soil Design Parameters for Mat Foundations
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DOI：
10.1061/(asce)0733-9410(1990)116:7(1073
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发表时间：
1990-07
期刊：
影响因子：
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通讯作者：
R. G. McKeen;L. Johnson
中科院分区：
文献类型：
--
作者：
R. G. McKeen;L. Johnson
Mat foundation design requires an analysis of the mat when subjected to unsupported regions due to swelling or shrinkage of expansive soils. A study was conducted to investigate simple rational methods for calculating the active zone depth (\Iz\N) and from it the edge moisture penetration distance (\IL\dm\N) in expansive soils. Analysis of soil moisture diffusion assuming a periodic variation in surface-soil suction indicated that \Iz\N can be a function of the maximum suction change imposed minimum suction change considered significant, climate frequency, and field diffusion coefficient. The \IL\dm\N may be given by \Iz\N-\ID\N where \ID\N is the depth of the foundation or perimeter stiffening beam below ground surface. Data required to evaluate \Iz\N and \IL\dm\N were obtained from field observations made during an 18-month study on airport pavements on expansive soils. These climatic parameters may also be used in design of mat foundations supporting structures.
