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针对位于黏土地基中的建筑基础是否存在浮力折减的问题和争议,本文提出直观易懂的地下水浮力模型试验方法,不需借助任何测试仪器,直接将4个不同重量的基础模型埋置于黏土地基中,观察其上浮情况,并找出浮起的最重基础模型和不浮起的最轻基础模型以确定折减系数的范围,进而通过严格的受力分析计算得出确切的地下水浮力折减系数值。通过3组不同埋深的模型试验,得出黏土地基中的水浮力存在折减,且由试验现象初步估算出的综合折减系数在0.41～0.58之间,经严格受力分析计算得到浮力折减系数为0.73。
In order to solve the problems and controversies about the buoyancy reduction of the foundations located in the clay foundation, this paper presents an intuitive and understandable test method for the groundwater buoyancy model. Without using any testing equipment, four foundation models of different weights are directly embedded in clay Foundation, observe its floating situation, and find the longest floating base model and the longest base model does not float to determine the scope of the reduction factor, and then through rigorous stress analysis calculated the exact groundwater buoyancy fold Decrease the value. Through the three groups of model tests with different depths, it can be concluded that the water buoyancy in the clay foundation is reduced, and the comprehensive reduction coefficient preliminarily estimated from the test phenomenon is between 0.41 and 0.58. The buoyancy fold The reduction factor is 0.73.