Study on Mechanical Characteristics of Single Pile Through Karst Development and Disposal Measures of Karst Cave
For the engineering geological background of single pile crossing karst development,Using numerical simulations,This paper discusses the influence rules of karst cave existence conditions,size,position and filling characteristics on pile deformation,formation deformation and formation stress,Provide the disposal measures,The main conclusions are as follows:(1)with the increase of the pile top load,Pile roof settlement,pile compression and formation settlement are all linear increase,The settlement of the lower pile top of the karst cave is relatively small,But the pile body deformation is large;(2)The maximum deformation resistance ability of the formation without karst cave,After a large deformation,The overall deformation of the formation is in a"funnel"shape,The surrounding rock at the top of the dissolution cavity is greatly deformed,Local tension of the bottom of the pile and the bottom of the cave,The compressive stress near the karst cave is large;(3)It is proposed that the small karst cave,the medium karst cave with buried depth more than 10 m adopt pouring cement mixture,low grade concrete and steel cylinder,and the full rotary drill in the area with strong karst development.The study conclusion can provide a reference for similar projects.
万方数据
维普
