Research And Analysis Of Dewatering Technology For Foundation Pits Of Pumping Stations In Zhenxing Irrigation District

In recent years,heilongjiang province has attached great importance to the development of water conservancy,constructing large-scale water conservancy projects such as flood control and disaster reduction,rural water conservancy,water resources protection,water and soil conservation and river ecological restoration.How to effectively dewatering in the construction of large hydraulic structures is the key to ensure safe construction.Foundation pit dewatering,as one of the very important links in the construction of large-scale water conservancy building projects,can prevent the generation of quicksand,reduce the uplift of foundation soil,and has a significant effect on increasing the stability of slope and base.This paper takes the foundation pit dewatering project of zhenxing irrigation station as an example,takes the deep well dewatering method of foundation pit as the research object,carries out the design of deep well dewatering of foundation pit through the parameters determined by the well pipe dewatering pumping test,and determines the feasibility of the dewatering design scheme.Combined with the actual situation of the site,the construction technology of dewatering well is studied,which provides a scientific basis for the dewatering design scheme of deep well of foundation pit.The main research contents of this paper include the following two parts:(1)combining with the actual geological conditions,hydrological conditions and the target requirements to be achieved by engineering precipitation,the reasonable structure type and plane layout of the dewatering well are designed based on the "big well method" as the theoretical basis and the hydrogeological parameters determined by field tests as the design calculation parameters.(2)study the construction technology and construction method of well point precipitation,and strictly control its quality index with relevant specifications asconstraint conditions.To ensure the construction quality of foundation pit dewatering project and provide favorable conditions for the normal operation of foundation pit dewatering.Through the research of this paper and the feedback of the actual operation of the project.The foundation pit dewatering project was successfully completed without any adverse factors affecting the foundation pit dewatering.