WATERSTOP AND DRILLING METHOD USING IT

摘要

PROBLEM TO BE SOLVED: To provide a waterstop for preventing the return of underground water due to drilling, and preventing work space from submerging or earth and sand from being washed away simultaneously with the underground water for causing the sinking of the foundation, and to propose a drilling method for preventing the return of the underground water into the work space until injection is completed. SOLUTION: The waterstop used for drilling natural ground from the inside of a buried pipe comprises a base plate that is provided on the inner-wall surface of the buried pipe, a waterstop packing mounted to the base plate, and a guide plate mounted to the waterstop packing.