Dewatering Technology under Emergency State of Groundwater Level Rise in Excavated Deep Foundation Pits
High water level deep foundation pit has a high permeability of sand and gravel formation.The completion and sealing of dewatering wells in the foundation pit require construction in a watery environment,which is diffi-cult to complete.The quality of dewatering well sealing directly affects the overall waterproof effect of the proj-ect,and it is difficult to control groundwater in the foundation pit.Combined with engineering practice proj-ects,it has been proven that the innovative use of hydraulic down-hole drilling rig completion technology and water swelling water blocking wooden plug dewatering well composite sealing technology can overcome con-struction difficulties such as large construction difficulties in water operating environments,large drilling diffi-culties in sandy gravel formation at the base layer,and large well sealing difficulties.The dewatering well com-pletion is effective,the construction efficiency is high,the well sealing quality is excellent,and the leakage prevention is effective.
excavated foundation pitpile-anchor support structuresand pebble foundationdown-hole drilldewater-ing well closure
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