摘要
岩溶地区采用桩板结构进行处理时,设计的关键是如何合理确定桩长。而桩长的确定应同时满足最小嵌岩深度以及最小溶洞顶板厚度要求。文章根据岩溶地区桩板结构桩基工程的特点,考虑桩基承载力及稳定性要求,并考虑倾斜岩层对桩基影响、提出了岩溶地区桩板结构桩基嵌岩深度的确定方法,基于溶洞顶板抗弯、抗剪要求,提出了岩溶地区桩基下伏溶洞顶板厚度的确定方法,通过工程实例,探讨了岩溶地区桩板结构桩基桩长的一般设计流程。
If the pile-slab structure is adopted in karst area, the key to the design is how to determine a reasonable length of pile, which shall at the same time meet the requirements of the minimum rock-socketed depth and the minimum thickness of roof for karst cave. According to the characters of pile foundation with pile-slab structure in karst area, and considering the requirments of bearing capacity and stability of pile foundation and the influence of inclined rock stratum on pile foundation, this paper presents a method to determine rock-socketed depth, based on the bending and shear requirments of cave roof, proposes a method to determine the thickness of roof for karst cave underneath of pile foundation in the karst area. In this paper, a discussion is made on general design flow of length of pile foundation with pile-slab structure in the karst area by citing an engineering case as example.
出处
《高速铁路技术》
2012年第4期28-31,共4页
High Speed Railway Technology
关键词
岩溶地区
桩板结构
嵌岩深度
溶洞顶板厚度
karst area
pile-slab structure
rock-socketed depth
thickness of roof for karst cave
