- 摘 要
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馬石城 鄒銀生 王貽蓀
（湖南大學土木工程學院 長沙 410082）[提要] 將基坑隔水土層簡化為一有預壓力的受均布荷載的四邊固支板，假設土體為彈性和理想彈塑性體，分別進行了彈性和彈塑性分析，以土體不能受拉為條件，求出了基坑隔水土層的臨界厚度。計算結果比傳統(tǒng)方法的計算結果更符合實際情況，特別是彈塑性分析所得結果接近真實的臨界厚度；對于條形基坑，所得臨界厚度遠比傳統(tǒng)方法所得結果為低。
[關鍵詞] 基坑 承壓水 隔水土層 臨界厚度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
