A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
GROUND IMPROVEMENT METHOD AND GROUND IMPROVEMENT SYSTEM
PROBLEM TO BE SOLVED: To provide a ground improvement method and a ground improvement system that ensure water drainage from an improved ground, without banking.SOLUTION: A ground improvement method is for an improvement area with a silt layer covered with a sandy soil layer, and includes the following steps for: building a cut-off wall surrounding the improvement area, to a depth reaching a bottom part of the sandy soil layer; installing a vertical drain inside the improvement area, to a depth reaching inside of the silt layer; installing an auxiliary drain inside the improvement area, for draining water inside the sandy soil layer; covering a surface of the improvement area in which the vertical drain and the auxiliary drain have been installed, with an air-tight sheet material; connecting a vacuum pump to the auxiliary drain; and starting the vacuum pump for draining water from the sandy soil layer through the auxiliary drain and from the silt layer through the vertical drain.SELECTED DRAWING: Figure 6
【課題】盛土を盛ることなく、改良地盤の排水を確実に行うことができる地盤改良工法及び地盤改良システムを提供する。【解決手段】砂質土層で覆われたシルト層を含む改良区の地盤改良工法であって、前記改良区の周囲を囲むように、前記砂質土層の底部にまで届く深さの止水壁を形成する工程と、前記改良区の内側に、前記シルト層の内部に到達する深さの鉛直ドレインを打設する工程と、前記改良区の内側に、前記砂質土層内の水を排水する補助排水ドレインを打設する工程と、前記鉛直ドレイン及び前記補助排水ドレインが設置された前記改良区の表面を気密性を有するシート材で覆う工程と、前記補助排水ドレインに真空ポンプを接続する工程と、前記真空ポンプを作動させて、前記補助排水ドレインを通じて前記砂質土層の排水を行うとともに、前記鉛直ドレインを通じて前記シルト層の排水を行う工程と、を有する地盤改良工法による。【選択図】図６
GROUND IMPROVEMENT METHOD AND GROUND IMPROVEMENT SYSTEM
PROBLEM TO BE SOLVED: To provide a ground improvement method and a ground improvement system that ensure water drainage from an improved ground, without banking.SOLUTION: A ground improvement method is for an improvement area with a silt layer covered with a sandy soil layer, and includes the following steps for: building a cut-off wall surrounding the improvement area, to a depth reaching a bottom part of the sandy soil layer; installing a vertical drain inside the improvement area, to a depth reaching inside of the silt layer; installing an auxiliary drain inside the improvement area, for draining water inside the sandy soil layer; covering a surface of the improvement area in which the vertical drain and the auxiliary drain have been installed, with an air-tight sheet material; connecting a vacuum pump to the auxiliary drain; and starting the vacuum pump for draining water from the sandy soil layer through the auxiliary drain and from the silt layer through the vertical drain.SELECTED DRAWING: Figure 6
【課題】盛土を盛ることなく、改良地盤の排水を確実に行うことができる地盤改良工法及び地盤改良システムを提供する。【解決手段】砂質土層で覆われたシルト層を含む改良区の地盤改良工法であって、前記改良区の周囲を囲むように、前記砂質土層の底部にまで届く深さの止水壁を形成する工程と、前記改良区の内側に、前記シルト層の内部に到達する深さの鉛直ドレインを打設する工程と、前記改良区の内側に、前記砂質土層内の水を排水する補助排水ドレインを打設する工程と、前記鉛直ドレイン及び前記補助排水ドレインが設置された前記改良区の表面を気密性を有するシート材で覆う工程と、前記補助排水ドレインに真空ポンプを接続する工程と、前記真空ポンプを作動させて、前記補助排水ドレインを通じて前記砂質土層の排水を行うとともに、前記鉛直ドレインを通じて前記シルト層の排水を行う工程と、を有する地盤改良工法による。【選択図】図６
GROUND IMPROVEMENT METHOD AND GROUND IMPROVEMENT SYSTEM
地盤改良工法及び地盤改良システム
ICHIKAWA HIROSHI (author)
2016-05-09
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
GROUND IMPROVEMENT DEVICE, GROUND IMPROVEMENT SYSTEM, AND GROUND IMPROVEMENT METHOD
| European Patent Office | 2019
GROUND IMPROVEMENT DEVICE, GROUND IMPROVEMENT SYSTEM, AND GROUND IMPROVEMENT METHOD
| European Patent Office | 2020