自适应调节下广义复合基础设计方法与工程实践  

Design method and practice of generalized composite foundation by use of self-adaptable adjustor

作　　者：宰金珉[1] 周峰[1] 梅国雄[1] 王旭东[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009

出　　处：《岩土工程学报》2008年第1期93-99,共7页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(50678083);国家青年自然科学基金资助项目(50608038);江苏省六大人才高峰资助项目

摘　　要：差异沉降是导致基础内力和上部结构次应力增大、基础板厚与配筋增加的根源,因此,保证筏板的零差异沉降是建筑物结构体系保持最优状态的根本措施,而实现这一措施最有效的方法就是合理布置与调整地基与桩基的支承刚度。另外,端承桩基础如何充分利用良好的地基土承载力仍然是桩土共同作用理论应用的一大难题。为此,专门研制了置于桩顶的变形调节器,并报导了它的构造和工作特性,通过它对桩土支承体系支承刚度进行人为干预下的自适应调节,提出了广义复合基础的设计方法。一项工程实践表明:本方法不仅成功解决了上述问题,而且取得了良好的经济效益。Difference settlement is the root which causes the increase of the internal force of foundation and the substress in superstructure as well as the increase of the thickness of raft and the steel. So minimizing raft difference settlement is the most essential measure that makes the working state of buildings keep optimizational. Then in order to realize the goal, the most effective measure is to disposal and adjust the bearing stiffness of subsoils and/or pile foundations. Otherwise, how to make use of the baering capacity of soil foundation for end-bearing pile foundation is a difficult problem for the application of pile-soil interaction theory. Consequently, a kind of settlement adjustor installed at the top of piles was studied, and its constitution and work characteristics were reported. Under artificial controlling by using settlement adjustors, through self-adaptation of bearing stiffness of piles and soil, the design method of the generalized composite foundation was put forward. The design method has been proved to be successful by a practical project.

关 键 词：自适应调节器 差异沉降控制 广义复合基础 支承刚度调整 

分 类 号：TU473.1[建筑科学—结构工程]