研究目的:研究倾斜基岩上柔性条形基础总沉降和不均匀沉降的计算方法,减少地基不均匀沉降。
研究结论:(1)沿着地基表面,基岩倾斜对地基总沉降的影响随之变化,对地基中心处的影响最小;当基 岩倾角小于45°时,不均匀沉降受倾斜基岩的影响非常显著;(2)在倾斜基岩影响下的沉降影响系数和不均 匀沉降影响系数的建议值,可用于路堤等柔性浅条形基础的沉降计算,也可供下部存在基岩的竖向条形荷载 下可压缩土体的沉降计算;(3)由于倾斜基岩的普遍存在,为了避免因忽视倾斜基岩引起的地基不均匀沉降, 而造成柔性基础设计上的失误,应加强这方面的研究。
Research purposes: The researches are done on the computing methods of the total subsidence volume and uneven subsidence volume of flexible strip foundation on tilted foundation for the purpose of reducing uneven subsidence.
Research conclusions: (1)The influence of tilted foundation rock on the subsidence of flexible strip foundation changes with the change of ground surface, the influence on central area of the foundation is the smallest. When the gradient of foundation rock is leas than 450,the influence on uneven subsidence by tilted foundation rock is notable.(2)The proposed values of subsidence influencing coefficient and uneven subsidence influencing coefficient under effects of tilted foundation rock can be used for calculation of the subsidence of flexible strip foundation for embankment and it also can be used for calculation of subsidence of the compacted soil on the bottom under vertical strip load of foundation rock. ( 3 ) The research on this field should be strengthened for keeping mistaken design of flexible foundation away because of neglecting the uneven subsidence of foundation caused by tilted foundation rock.