A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
GROUND IMPROVING METHOD AND GROUND IMPROVING SYSTEM
PROBLEM TO BE SOLVED: To reduce effect on operation period of excavation works in a ground improvement works by reducing operation cost of the ground improvement works.SOLUTION: There is provided a ground improvement method in which the ground comprising a water permeable layer 2 below an improvement target layer 1 consisting of a viscosity soil layer inside of an earth retaining wall 12 is improved by discharging underground water. The method comprises the steps of: constructing the earth retaining wall 12 so that it reaches the water permeable layer 2; digging a hole 34 on the ground inside of the earth retaining wall 12 so that it reaches the water permeable layer 2; inserting a middle pile 32 into the hole 34; filling up a gap between the middle pile 32 and a hole wall in the hole 34 with a drain material 36; establishing a pumping well 20 draining water from the water permeable layer 2 on the ground inside of the earth retaining wall 12; and discharging underground water in the improvement target layer 1 via the water permeable layer 2 and the hole 34 filled up with the drain material 36 with the pumping well 20.
【課題】地盤改良工事の施工コストを抑え、地盤改良工事による開削工事の工期に及ぶ影響を減らす。【解決手段】土留め壁１２の内側の粘性土層である改良対象層１の下に透水層２が存在する地盤を、地下水を排水することにより改良する地盤改良工法であって、土留め壁１２を透水層２に達するように構築する工程と、土留め壁１２の内側の地盤に孔３４を透水層２に達するように掘削する工程と、孔３４に中間杭３２を挿入する工程と、孔３４の中間杭３２と孔壁との間にドレーン材３６を充填する工程と、土留め壁１２の内側の地盤に透水層２から揚水する揚水井戸２０を設置する工程と、揚水井戸２０により透水層２及びドレーン材３６を充填した孔３４を通して改良対象層１の地下水を排水する工程とを備える。【選択図】図１
GROUND IMPROVING METHOD AND GROUND IMPROVING SYSTEM
PROBLEM TO BE SOLVED: To reduce effect on operation period of excavation works in a ground improvement works by reducing operation cost of the ground improvement works.SOLUTION: There is provided a ground improvement method in which the ground comprising a water permeable layer 2 below an improvement target layer 1 consisting of a viscosity soil layer inside of an earth retaining wall 12 is improved by discharging underground water. The method comprises the steps of: constructing the earth retaining wall 12 so that it reaches the water permeable layer 2; digging a hole 34 on the ground inside of the earth retaining wall 12 so that it reaches the water permeable layer 2; inserting a middle pile 32 into the hole 34; filling up a gap between the middle pile 32 and a hole wall in the hole 34 with a drain material 36; establishing a pumping well 20 draining water from the water permeable layer 2 on the ground inside of the earth retaining wall 12; and discharging underground water in the improvement target layer 1 via the water permeable layer 2 and the hole 34 filled up with the drain material 36 with the pumping well 20.
【課題】地盤改良工事の施工コストを抑え、地盤改良工事による開削工事の工期に及ぶ影響を減らす。【解決手段】土留め壁１２の内側の粘性土層である改良対象層１の下に透水層２が存在する地盤を、地下水を排水することにより改良する地盤改良工法であって、土留め壁１２を透水層２に達するように構築する工程と、土留め壁１２の内側の地盤に孔３４を透水層２に達するように掘削する工程と、孔３４に中間杭３２を挿入する工程と、孔３４の中間杭３２と孔壁との間にドレーン材３６を充填する工程と、土留め壁１２の内側の地盤に透水層２から揚水する揚水井戸２０を設置する工程と、揚水井戸２０により透水層２及びドレーン材３６を充填した孔３４を通して改良対象層１の地下水を排水する工程とを備える。【選択図】図１
GROUND IMPROVING METHOD AND GROUND IMPROVING SYSTEM
地盤改良工法、及び地盤改良システム
MATSUMOTO SHIN (author) / SUGIE SHIGEHIKO (author)
2015-08-20
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
GROUND IMPROVING ADDITIVE, GROUND IMPROVING COMPOSITION AND GROUND IMPROVING METHOD
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