地下结构浮力与埋深高度关系试验研究

Experimental Study on Relationship between Buoyancy and Depth of Underground Structure

摘要: 本文根据地下水在静水条件下对地下结构产生浮力的影响特点，在消除侧壁力影响的情况下，研制出一套地下结构抗浮模型。确定模型基本参数后，针对砂土质土壤结构进行一系列实验，通过水位的变化来研究地下结构在不同埋深时浮力的变化规律。试验结果表明，在本试验装置可行性平均误差为0.45%的情况下，饱和砂土中，模型底板受到实际浮力与理论值差异随埋深的增大而变大。

Abstract: According to the influence of underground water on the underground structure, the anti-floating model of underground structure is developed under the condition of neglecting the effect of side wall force. After determining the basic parameters of the model, a series of experiments are carried out to study the structure of sandy soil, and the variation law of the buoyancy of the underground structure at different burial depth is studied by the change of water level. The experimental results show that the difference between the actual buoyancy and the theoretical value increases with the increase of the buried depth in the saturated sand soil under the condition of the average error of 0.45%.