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 work efficiency of a pneumatic caisson method by setting a working air pressure lower than normally planned values, made possible by appropriately managing saturation degree of construction ground.SOLUTION: Prior to installing a caisson 10, air is injected into a ground for desaturating the ground, thereby reducing an amount of groundwater flowing into a caisson work room. Specifically, an air feed pipe 20 having an air supply port 21 is inserted into a ground near the location to install the caisson 10, and air is injected into the ground while raising pressure of the supplied air as a depth of the air supply port 21 increases.SELECTED DRAWING: Figure 1
【課題】 ニューマチックケーソン工法において、施工地盤の飽和度を適正に管理することにより、一般的な計画値よりも作業気圧を低く設定して、作業効率を高める。【解決手段】 ケーソン１０の沈設に先行して、地盤中に気体を注入することにより当該地盤を不飽和化し、ケーソン作業室内への地下水流入量を低減させる。具体的には、ケーソン１０を沈設する周囲の地盤中に、送気口２１を有する送気管２０を挿入し、送気口２１の深度が大きくなるに従って、送気する気体圧力を高めながら地盤中に気体を注入する。【選択図】図１
PNEUMATIC CAISSON METHOD
PROBLEM TO BE SOLVED: To enhance work efficiency of a pneumatic caisson method by setting a working air pressure lower than normally planned values, made possible by appropriately managing saturation degree of construction ground.SOLUTION: Prior to installing a caisson 10, air is injected into a ground for desaturating the ground, thereby reducing an amount of groundwater flowing into a caisson work room. Specifically, an air feed pipe 20 having an air supply port 21 is inserted into a ground near the location to install the caisson 10, and air is injected into the ground while raising pressure of the supplied air as a depth of the air supply port 21 increases.SELECTED DRAWING: Figure 1
【課題】 ニューマチックケーソン工法において、施工地盤の飽和度を適正に管理することにより、一般的な計画値よりも作業気圧を低く設定して、作業効率を高める。【解決手段】 ケーソン１０の沈設に先行して、地盤中に気体を注入することにより当該地盤を不飽和化し、ケーソン作業室内への地下水流入量を低減させる。具体的には、ケーソン１０を沈設する周囲の地盤中に、送気口２１を有する送気管２０を挿入し、送気口２１の深度が大きくなるに従って、送気する気体圧力を高めながら地盤中に気体を注入する。【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) / YAMAUCHI TAKAHIRO (author) / HOTATE YUTAKA (author) / KAWANISHI ATSUSHI (author) / ARITA JUN (author)
2016-05-19
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
TELPHER CRANE FOR PNEUMATIC CAISSON AND CONSTRUCTION METHOD OF PNEUMATIC CAISSON
| European Patent Office | 2015
Engineering Index Backfile | 1907