Survey Methods And Pile Construction Technology Of Bridge In Karst Region

China is a relatively developed karst areas.With the economic development , there are more and more projects of engineering construction in the karst area.This would trigger the karst geologieal issues such as the stability of karst foundation, karst leakage, karst eave, which is attracting more concern from people. Therefore , a comprehensive and accurate survey of the karst area of the engineering geological conditions, the application of the correct approach on the ground it is very important. At present, although the experts and scholars at home and abroad have made the many studies and has achieved many accomplishments and achievements in karst developmental conditions, causes, mechanisms, types, impact factors, karst topography, karst cave in, but studying engineering karst is still relatively weak.With the development of construction techniques, it's also important to put more emphasis on study of construction techniques.Based on the field investigation, the paper uses the latest theoretical basis karst geology to study survey methods in karst areas and notes, measures to deal with karst, bridge pile foundation construction and problems in the foundation construction process in karst; gain some achievements.Finally study on the quality detection of pile foundations in karst region is made from which specific requirements and implementary methods are proposed for the detection of piles.