Design and Construction of Radial Well for Water Intake Project near River in Yellow River Beach of Zhongning County

Abstract:

Zhongning County is located in the middle Yellow River. Yellow River beach groundwater is supplied by Yellow River, which has great potential for mining water. For the riverside well field in the Quaternary clay sand gravel stratum of Zhongning Yellow River beach， radial well was selected to be water conservancy building and 5 wells were completed. The collecting well was constructed with reverse circulation method and special bit was equipped to fish the boulders in aquifer with particle size more than 200mm, the horizontal radiation tube was constructed by full hydraulic horizontal drilling rig with torque, thrust force, pulling force and vibro-compaction. The “equivalent big diameter well” was used to calculate pumping capacity of radial well. The data of pumping test and related information were analyzed to compare the stable water yield and drawdown of radial well, tubular well and large diameter well, the results show that the radial well is an effective way for the exploitation in the similar water resources.

Key words:riverside well field; the Yellow River beach; sand and gravel aquifer; radial well; pumping test; water intake project