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强风化岩石地基相对一般地基土承载力高,压缩变形小,当强风化岩层较厚,地下水位很高,可采用柱下梁式基础。根据梁的架越作用,要使梁底压力较均匀分布,必须加大梁高,提高梁的相对刚度。因强风化岩石地基有一定的压缩性,考虑沿深度及沿梁长方向风化程度的不均匀性采用有限压缩层地基模型,并根据梁高不同分别按一般弹性地基浅梁、深梁理论,采用有限元法求得基底压力、梁的变形及内力。
Strong weathered rock foundation relative to the general bearing capacity of high foundation soil, compressive deformation is small, when the strong weathering rock is thick, high groundwater level, the column beam can be used under the foundation. According to the role of the beam frame, to make the beam bottom pressure is more evenly distributed, we must increase the beam height and increase the relative stiffness of the beam. Due to the compressibility of the strongly weathered rock foundation, the finite compressive layer foundation model is considered considering the depth and the non-uniform weathering along the length of the beam. Based on the theory of shallow and deep beams of general elastic foundation, Finite element method to calculate the base pressure, beam deformation and internal force.