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地表建筑物受井下开采引起地表移动的影响而产生变形乃至破坏的现象是普遍存在的,究其原因,主要是由变形土体对建筑物基础产生附加应力传递给上部结构,导致变形和破坏。因此,准确合理地计算地表变形区变形土体对基础产生的附加应力,是经济合理地设计煤矿新建建筑以及安全可靠地加固已有建筑的先决条件。就国内外的资料来看,目前计算采空区土体压力方法的主要缺陷是没有考虑土体的非线性应力应变特征,或是简单地按土体的极限状态计算。本文从土力学原理出发,寻求一种根据土工试验的结果来计算土体侧压力的途径。
The phenomenon of deformation or even damage caused by surface movement caused by underground mining is common. The reason for this is that additional stress is generated from the deformed soil body to the foundation of the building and is transmitted to the superstructure, resulting in deformation and damage. Therefore, the accurate and reasonable calculation of the additional stress on the foundations caused by deformed soil in the surface deformation area is a prerequisite for the economical and rational design of new buildings in coal mines and for the safe and reliable reinforcement of the existing buildings. According to the data both at home and abroad, the main shortcomings of the present method for calculating soil pressure in goaf are that it does not consider the nonlinear stress-strain characteristics of soil or simply calculate according to the limit state of soil. In this paper, starting from the principle of soil mechanics, we seek a way to calculate the lateral pressure of soil body based on the result of geotechnical test.