| 摘要 |
PROBLEM TO BE SOLVED: To delicately, easily and surely inject chemicals for coping with properties of surrounding bedrock. SOLUTION: This chemical injection set has: a multi-passage injection pipe body; and a partition support for supporting the pipe body in a concentrically circular shape in a perforated long size buried pipe and partitioning the multi-passage injection pipe body and the perforated long size buried pipe. The set is assembled at a job site by selecting a using passage, opening a chemical blowout hole, determining the number of partition supports and a fitting installing position and fitting and installing the partition support to and in the multi-passage injection pipe body on the basis of bedrock information, and is loaded inside the perforated long size buried pipe in a bedrock excavating hole. The multi-passage injection pipe body is supported in a concentrically circular shape by the partition support, and an annular space between an outer peripheral surface of the multi-passage injection pipe body and an inner peripheral surface of the perforated long size buried pipe is partitioned by the partition support. Afterwards, the chemicals are fed in a prescribed passage, and are delivered, exuded, hardened and consolidated toward the surrounding bedrock from the chemical blowout hole, the annular space and a peripheral wall hole of the perforated long size buried pipe. COPYRIGHT: (C)2004,JPO
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