A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PNEUMATIC CAISSON METHOD
PROBLEM TO BE SOLVED: To enhance working efficiency by properly managing a saturation degree of the excavation object ground in a pneumatic caisson method.SOLUTION: An unsaturate region is formed by injecting gas toward the ground of existing under a cutting edge 30 of a caisson skeleton 10, and the unsaturated region is formed in the peripheral ground of the caisson skeleton 10 in response to sinking of the caisson skeleton 10, so that an underground water inflow quantity into a caisson work chamber 20 is reduced. In the ground where a water permeable layer exists above and below by sandwiching a hardly water permeable layer, the gas is injected in advance into the water permeable layer of existing in a lower part of the hardly water permeable layer, and the unsaturated region is formed in the peripheral ground of the water permeable layer of existing in the lower part of the hardly water permeable layer.SELECTED DRAWING: Figure 1
【課題】 ニューマチックケーソン工法において、掘削対象地盤の飽和度を適正に管理することにより、作業効率を高める。【解決手段】 ケーソン躯体１０の刃口３０の下方に存在する地盤へ向かって気体を注入して不飽和領域を形成し、当該ケーソン躯体１０の沈設に伴い、ケーソン躯体１０の周辺地盤に不飽和領域を形成することにより、ケーソン作業室２０内への地下水流入量を低減させる。難透水性層を挟んで上下に透水性層が存在する地盤では、予め難透水性層の下部に存在する透水性層へ気体を注入して、難透水性層の下部に存在する透水性層の周辺地盤に不飽和領域を形成する。【選択図】図１
PNEUMATIC CAISSON METHOD
PROBLEM TO BE SOLVED: To enhance working efficiency by properly managing a saturation degree of the excavation object ground in a pneumatic caisson method.SOLUTION: An unsaturate region is formed by injecting gas toward the ground of existing under a cutting edge 30 of a caisson skeleton 10, and the unsaturated region is formed in the peripheral ground of the caisson skeleton 10 in response to sinking of the caisson skeleton 10, so that an underground water inflow quantity into a caisson work chamber 20 is reduced. In the ground where a water permeable layer exists above and below by sandwiching a hardly water permeable layer, the gas is injected in advance into the water permeable layer of existing in a lower part of the hardly water permeable layer, and the unsaturated region is formed in the peripheral ground of the water permeable layer of existing in the lower part of the hardly water permeable layer.SELECTED DRAWING: Figure 1
【課題】 ニューマチックケーソン工法において、掘削対象地盤の飽和度を適正に管理することにより、作業効率を高める。【解決手段】 ケーソン躯体１０の刃口３０の下方に存在する地盤へ向かって気体を注入して不飽和領域を形成し、当該ケーソン躯体１０の沈設に伴い、ケーソン躯体１０の周辺地盤に不飽和領域を形成することにより、ケーソン作業室２０内への地下水流入量を低減させる。難透水性層を挟んで上下に透水性層が存在する地盤では、予め難透水性層の下部に存在する透水性層へ気体を注入して、難透水性層の下部に存在する透水性層の周辺地盤に不飽和領域を形成する。【選択図】図１
PNEUMATIC CAISSON METHOD
ニューマチックケーソン工法
TEZUKA HIROAKI (author) / MORITA ATSUSHI (author) / OGUMA NOBORU (author) / GOTO NOBUO (author) / YAMAUCHI TAKAHIRO (author)
2017-05-25
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
Engineering Index Backfile | 1907
TELPHER CRANE FOR PNEUMATIC CAISSON AND CONSTRUCTION METHOD OF PNEUMATIC CAISSON
| European Patent Office | 2015