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一、前言随着我国经济建设的发展,大中城市高层建筑迅速增多。当地基承载力及地基沉降变形能满足要求时,大部分高层建筑基础可采用箱形基础或筏式基础。这类建筑由于荷载重,基础面积大,导致地基压缩层深度和影响范围大,基础埋置深。基坑开挖时地基回弹变形也是不可忽视的因素。因此该类地基沉降变形规律比一般中小型基础更为复杂。目前,我国《高层建筑箱形基础设计与施工规程》(JGJ6—80)的地基沉降变形计算方法仍采用分层总和法,并乘以沉降计算经验系数M_x,由于高层建筑实测沉降观测资料较少,而这些资料主
I. INTRODUCTION With the development of China’s economic construction, high-rise buildings in large and medium-sized cities have rapidly increased. When the local base bearing capacity and settlement deformation energy of the foundation meet the requirements, the foundation of most high-rise buildings can be box-shaped foundation or rake-type foundation. Because of the heavy load and large base area of this type of building, the depth and impact range of the compression layer of the foundation are large, and the foundation is buried deep. The rebound of foundation during excavation is also a factor that cannot be ignored. Therefore, the settlement and deformation laws of this type of foundation are more complex than the general medium and small scale foundations. At present, China’s “High-rise Building Box Foundation Design and Construction Regulations” (JGJ6-80) still uses the stratified summation method for the ground settlement deformation calculation method, and multiplied by the empirical calculation coefficient M_x for settlement calculation, because there are less observations of settlement observations in high-rise buildings. , and these data masters