- 摘 要
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马石城 邹银生 王贻荪
(湖南大学土木工程学院 长沙 410082)[提要] 将基坑隔水土层简化为一有预压力的受均布荷载的四边固支板,假设土体为弹性和理想弹塑性体,分别进行了弹性和弹塑性分析,以土体不能受拉为条件,求出了基坑隔水土层的临界厚度。计算结果比传统方法的计算结果更符合实际情况,特别是弹塑性分析所得结果接近真实的临界厚度;对于条形基坑,所得临界厚度远比传统方法所得结果为低。
[关键词] 基坑 承压水 隔水土层 临界厚度The layer of soil withstanding pressure water is simplified as a fixed four edged plate with a uniform load and lateral force. Assuming that the soil is an elastic and completely elastic-plastic body, and that the tension strength of soil is zero, we can obtain the critical thickness of the layer of soil withstanding pressure water. The calculated result tallies with actual situation better than the result derived through the old method.
Keywords: pit; pressure water; the layer; soil; withstanding; critical thickness