The Research Of Bridge Pile Foundation In Karst Region Forming Processing Schemes

With the development of economy and the progress of science and technology at the present stage,the demand of the highway is increasing.With the rapid increase of highway mileage,it is inevitable to increase highway construction in karst area.This paper is mainly for the bridge foundation construction in karst area,how to solve the problem of pile foundation construction in karst area in the construction process,to ensure the safety and quality of pile foundation.Due to the construction of pile foundation in karst cave with unpredictable and dangerous.This thesis mainly through analysis of cave pile foundation in the construction process have features of karst caves,in view of the problems in the construction of the investigation and analysis,explore the cave in pile foundation in construction process to take effective measures is appropriate,karst area pile foundation construction is the key to bridge construction,pile foundation construction smoothly or not,to determine the engineering schedule,quality and cost.To achieve the economic maximization of the cave pile foundation,pile foundation construction in the karst cave construction and technical personnel first carefully read the design drawings and survey data,file,clear the basic situation of pile foundation cave,soil cave,optimization of construction technology of bridge foundation in karst area,at the same time,strengthen the monitoring of the geological changes in the construction process,key monitoring slurry consistency,layers of the cave and filling material forms,do a good job with borehole logs,abnormal situation to analyze the reasons and choose appropriate treatment and to provide the evidence for the According to different geological abnormal different treatment plan,avoid the pile foundation in karst area in the construction process may appear inclined pile,drill pipe sticking,hole collaps,reaming,drilling buried break even pile construction accident,provide the experience to the later construction.This thesis in Guangdong Province two broad highway of a bridge in bridge foundation design and construction as the object,through the karst development status and influences to the engineering design and construction analysis,refer to the previous foundation construction technology,equipment,quality management successful experience,combined with on-site punching sample and record,summary has been the construction of the cave pile foundation treatment experience,analysis the treatment of suitability.In order to provide reference for the foundation construction of complex karst area,the research and application of the technical personnel in the field,in the combination of theory and practice,made a new hint.