MOUTH PIPE FOR HIGH PRESSURE JET MIXING METHOD, AND HIGH PRESSURE JET MIXING METHOD

• Main Authors: SHIOJIRI DAISUKE, TANAKA HIROYUKI, KITAZUME MASAYOSHI, OKADA HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 02.07.2015
• Subjects: DISPOSAL OF SOLID WASTE; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; PERFORMING OPERATIONS; RECLAMATION OF CONTAMINATED SOIL; RECLAMATION OF CONTAMINED SOIL SOIL; SOIL SHIFTING; TRANSPORTING; UNDERGROUND OR UNDERWATER STRUCTURES

PROBLEM TO BE SOLVED: To make an agent reach within a wide range in the ground, reduce surplus material's amount of leakage to the non-contaminated ground or ground surface, and shorten a construction period.SOLUTION: A mouth pipe 100 comprises an upper packer 101 and a lower packer 102. The mouth pipe 100's lower part is inserted into a mouth pipe insertion hole obtained by drilling from the ground surface 200 to a predetermined depth (for example, to the contaminated ground). A jet pipe for jetting an agent under high pressure into an agent injection region in the contaminated ground is inserted into the inside of the mouth pipe 100. A lower part packer 102 is arranged at the lower end of the mouth pipe 100, and occludes a gap between the outer peripheral surface of the mouth pipe 100 and the mouth pipe insertion hole by expanding during construction. The upper packer 101 is arranged at the upper end of the mouth pipe 100, and occludes a gap between the outer peripheral surface of the jet pipe and the inner peripheral surface of the mouth pipe 100 by expanding during the construction. 【課題】地盤中の広い範囲に薬剤を到達させ、余剰物の非汚染地盤や地表への漏出量を減少させ、施工期間を短縮する。【解決手段】口元管１００は、上部パッカ１０１と、下部パッカ１０２とを備える。口元管１００は、地表２００から所定の深さまで（例えば、汚染地盤に達するまで）削孔された口元管挿入穴にその下部が挿入される。口元管１００は、その内部に、汚染地盤内の薬剤注入領域に薬剤を高圧で噴射するための噴射管が挿入される。下部パッカ１０２は、口元管１００の下端部に配置されている。下部パッカ１０２は、施工時に膨張して口元管１００の外周面と口元管挿入穴との間の隙間を閉塞する。また、上部パッカ１０１は、口元管１００の上端部に配置されている。上部パッカ１０１は、施工時に膨張して噴射管の外周面と口元管１００の内周面の間の隙間を閉塞する。【選択図】図１