Ground Protection Wall Grouting Packer and Grouting Method for Preventing Inflow of Contaminated Groundwater in Upper Water Wells

摘要

An underground protection wall grouting packer device for preventing polluted water from flowing into an underground well and a grouting method thereof are provided to seal the space between a well wall and the packer device tightly by installing a rubber tube to the packer device. An underground protection wall grouting packer device for preventing polluted water from flowing into an underground well(1) comprises a contraction unit(11), a rubber tube(30), and a safety unit. The contraction unit contracts due to external force, as entering the underground well. The rubber tube wraps the contraction unit to seal the clearance between a well wall and the packer device. The safety unit includes a locking plate, a safety pin(24), and a pulling wire(25). The locking plate is rotative on inner and outer contraction tubes. The safety pin passes through the locking plate and a pressing ring and prevents the contraction unit from contracting. The pulling wire is connected with the safety pin to allow a worker to pull the safety pin.