COUNTERMEASURE METHOD FOR POLLUTED SOIL IN CLOSED TYPE SHIELD TUNNEL CONSTRUCTION

摘要

PROBLEM TO BE SOLVED: To provide a countermeasure method for treating heavy-metal polluted soil which achieves the prevention of secondary pollution and the reduction of construction cost and processes in a closed type shield tunnel construction. SOLUTION: An insolubilizing material is injected into the heavy-metal polluted soil in situ from the front surface of the excavated face of a closed type shield tunnel and agitated and mixed at a cutter surface. In addition, the standard of insolubilization is secured by promoting remixing and the reaction of insolubilization treatment in a pipe discharge pipe. COPYRIGHT: (C)2007,JPO&INPIT