Karst Area Of ​​bored Pile Bearing Capacity Test

Thickness of supporting layer and depth of pile in the rock are two important aspects considered in pile design in karst area. But it is difficult to detect its exact position and scope in advance by existing method because of disordered distributing of cave. Which often produces some unexpected problems, such as prolonging time limit of project, increasing engineering quantities and cost, etc. Through test on the site, dynamic value analysis, finite element unit method, the paper researchs construction technology of in-situ pile, transfer theory , thickness of supporting layer of head slab and depth of pile in karst area, provides some important conclusions, directs effectively the design and construction of this kind of projects.