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CHEMICAL INJECTION METHOD AND UNDERGROUND CHEMICAL INJECTION STRUCTURE WHEN INJECTING CHEMICAL
PROBLEM TO BE SOLVED: To provide a chemical injection method and an underground chemical injection structure when injecting chemical capable of injecting the chemical depending on a ground depth.SOLUTION: A chemical injection method comprises: a drilling process to construct a hole H by pressing a casing pipe 10 into the ground G; a layered body construction process to install a chemical injection pipe 20 having a plurality of chemical discharge ports 21 in the hole H, to construct a layered body 30 around the chemical injection pipe 20 by alternately layering an impermeable layer 31 preventing the chemical from permeating therethrough and a permeable layer 32 allowing the chemical to permeate therethrough in a vertical direction around the chemical injection pipe 20 in the hole H, and to pull out the casing pipe 10; and a chemical injection process to inject the chemical into the ground G through the permeable layer 32 with the chemical discharged through the plurality of discharge ports 21. The impermeable layer 31 is constructed of a material including solid bentonite and the permeable layer 32 is constructed of the material including at least sand or gravel and a foam body or cavities.
【課題】地盤の深度に応じて薬液を注入することができる薬液注入工法及び薬液注入時の地盤中の薬液注入構造を提供する。【解決手段】薬液注入工法は、ケーシングパイプ１０を地盤Ｇに貫入して孔Ｈを形成する削孔工程と、孔Ｈ内に、薬液の排出口２１を複数有する薬液注入管２０、及び、薬液注入管２０の周囲に設けられ、薬液の透水を防止する不透水層３１と薬液の透水を可能とする透水層３２とを孔Ｈの上下方向に交互に形成した積層体３０を設けるとともに、ケーシングパイプ１０を引き抜く積層体形成工程と、複数の排出口２１より薬液を排出させ、透水層３２を介して地盤Ｇ中に薬液を注入する薬液注入工程と、を含む。不透水層３１は、固形状のベントナイトを含む材料から形成され、透水層３２は、砂及び礫の少なくとも一方を含む材料、発泡体、又は空洞により形成される。【選択図】図１
CHEMICAL INJECTION METHOD AND UNDERGROUND CHEMICAL INJECTION STRUCTURE WHEN INJECTING CHEMICAL
PROBLEM TO BE SOLVED: To provide a chemical injection method and an underground chemical injection structure when injecting chemical capable of injecting the chemical depending on a ground depth.SOLUTION: A chemical injection method comprises: a drilling process to construct a hole H by pressing a casing pipe 10 into the ground G; a layered body construction process to install a chemical injection pipe 20 having a plurality of chemical discharge ports 21 in the hole H, to construct a layered body 30 around the chemical injection pipe 20 by alternately layering an impermeable layer 31 preventing the chemical from permeating therethrough and a permeable layer 32 allowing the chemical to permeate therethrough in a vertical direction around the chemical injection pipe 20 in the hole H, and to pull out the casing pipe 10; and a chemical injection process to inject the chemical into the ground G through the permeable layer 32 with the chemical discharged through the plurality of discharge ports 21. The impermeable layer 31 is constructed of a material including solid bentonite and the permeable layer 32 is constructed of the material including at least sand or gravel and a foam body or cavities.
【課題】地盤の深度に応じて薬液を注入することができる薬液注入工法及び薬液注入時の地盤中の薬液注入構造を提供する。【解決手段】薬液注入工法は、ケーシングパイプ１０を地盤Ｇに貫入して孔Ｈを形成する削孔工程と、孔Ｈ内に、薬液の排出口２１を複数有する薬液注入管２０、及び、薬液注入管２０の周囲に設けられ、薬液の透水を防止する不透水層３１と薬液の透水を可能とする透水層３２とを孔Ｈの上下方向に交互に形成した積層体３０を設けるとともに、ケーシングパイプ１０を引き抜く積層体形成工程と、複数の排出口２１より薬液を排出させ、透水層３２を介して地盤Ｇ中に薬液を注入する薬液注入工程と、を含む。不透水層３１は、固形状のベントナイトを含む材料から形成され、透水層３２は、砂及び礫の少なくとも一方を含む材料、発泡体、又は空洞により形成される。【選択図】図１
CHEMICAL INJECTION METHOD AND UNDERGROUND CHEMICAL INJECTION STRUCTURE WHEN INJECTING CHEMICAL
薬液注入工法及び薬液注入時の地盤中の薬液注入構造
MATSUNAGA TAKAYOSHI (author) / TSUKAMOTO NOBUO (author)
2015-07-06
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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