水文地质工程地质2026，Vol.53Issue(2)：95-104,10.DOI:10.16030/j.heg.202502011
浙江沿海平原承压含水层监测井建设洗井技术示范研究
Research and application of well flushing technology for confined aquifers in groundwater monitoring wells in the Zhejiang coastal plain
摘要
Abstract
Groundwater monitoring wells tapping deep confined aquifers in the Zhejiang coastal plain commonly suffer from low flushing efficiency,limited effective cleaning range,and incomplete removal of deep clogging materials.This study aims to improve the precision and efficiency of well flushing through technological innovation.Based on the limitations of traditional piston flushing techniques,such as significant energy attenuation and aquifer disturbance,an innovative oscillating well flushing technology integrating a section-sealed piston and mud pump is proposed.This approach combines the mechanisms of section isolation,water hammer effect,and seepage synergy.Expandable rubber packers are utilized to precisely isolate target well segments,while the synergistic interaction of high-frequency suction(-0.3--0.2 MPa)from the mud pump and piston pulling(0.6-1.2 m/s)generates alternating positive-negative pressure oscillations.Optimized dynamic segment isolation(2- 4 m per segment)and three-stage pressure regulation(0.2-2.0 MPa)effectively remove wellbore mud cake and filter layer clogging materials.Field validation via the Jiaxing groundwater monitoring network project demonstrates that the improved technology reduces flushing time by 40%-50%,increases permeability coefficient by 15%-35%,and enhances single-well yield by 20%-30%.Flushing fluid recycling efficiency is improved to 60%-65%.Moreover,the segment isolation design reduces hydrogeological parameter inversion errors from 15%-25%to 5%-8%,significantly improving groundwater model calibration accuracy.The technology integrating mechanical disturbance with dynamic negative pressure regulation,reduces carbon emissions by 35%-40%.The method provides critical technical support for coastal groundwater monitoring well construction,resource management,and land subsidence control,and presents strong potential for broad application in deep confined aquifers.关键词
浙江沿海平原/监测井/承压含水层/分段封隔/泥浆泵/振荡洗井/渗透系数/涌水量Key words
Zhejiang coastal plain/groundwater monitoring well/confined aquifer/segmented isolation piston/mud pump/oscillation well washing/permeability coefficient/well yield分类
天文与地球科学引用本文复制引用
杜常春,蒋建良,庄晓明,李建,武维勇..浙江沿海平原承压含水层监测井建设洗井技术示范研究[J].水文地质工程地质,2026,53(2):95-104,10.基金项目
中央资金补助地方财政专项(JXSJ-2023-58) （JXSJ-2023-58）
