Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
GROUND REINFORCEMENT METHOD USING PERFORATED STEEL PIPE WITH BLADE
PROBLEM TO BE SOLVED: To provide a ground improvement method that allows a construction condition of a perforated steel pipe to be set to suit a ground to be worked, the perforated steel pipe offering both a drainage function and a ground constraining function, and the selected steel pipe to be worked for certain on an artificial ground or a natural ground of any type of soil, including a viscous soil, a sandy soil, a gravel-mixed soil, or a combination of any of these.SOLUTION: A ground improvement method uses a perforated steel pipe with a blade having a spiral blade and a drain hole for discharging moisture in the ground formed on an outer periphery of a steel pipe body, and includes the following steps for: setting a ground constant for the ground to be worked; setting a current safety ratio and a planned safety ratio; calculating a necessary deterrent from the planned safety ratio, for both a normal condition and an earthquake disaster condition; calculating an installation length and an installation density of the perforated steel pipe with a blade; calculating a necessary tensile force and an allowable tensile force per perforated steel pipe with a blade; and driving the perforated steel pipe with a blade having the derived installation length into the ground at the installation density.SELECTED DRAWING: Figure 1
【課題】排水機能と地盤拘束機能を同時に有する有孔鋼管の施工条件を、施工する地盤に適応して決定し、決定された有孔鋼管を、粘性土、砂質土、礫混り土、それらの複合体等どのような土質の土で施工されていた人工地盤や自然地盤であっても、確実に施工できる工法を提供する。【解決手段】鋼製の管本体の外周に螺旋羽根と地盤内の水分を排出するための水抜き孔を設けた羽根付き有孔鋼管を用いた地盤補強工法であって、施工する地盤を対象に地盤定数を設定し、現況安全率、計画安全率を設定し、必要抑止力を、常時と地震時の各状態において、計画安全率から算定し、羽根付き有孔鋼管の設置長さ、設置密度を計算し、羽根付き有孔鋼管１本当たりの必要引張力、許容引張力を算定し、求められた設置長さを有する羽根付き有孔鋼管を、前記設置密度で当該地盤に捩じ込む。【選択図】図１
GROUND REINFORCEMENT METHOD USING PERFORATED STEEL PIPE WITH BLADE
PROBLEM TO BE SOLVED: To provide a ground improvement method that allows a construction condition of a perforated steel pipe to be set to suit a ground to be worked, the perforated steel pipe offering both a drainage function and a ground constraining function, and the selected steel pipe to be worked for certain on an artificial ground or a natural ground of any type of soil, including a viscous soil, a sandy soil, a gravel-mixed soil, or a combination of any of these.SOLUTION: A ground improvement method uses a perforated steel pipe with a blade having a spiral blade and a drain hole for discharging moisture in the ground formed on an outer periphery of a steel pipe body, and includes the following steps for: setting a ground constant for the ground to be worked; setting a current safety ratio and a planned safety ratio; calculating a necessary deterrent from the planned safety ratio, for both a normal condition and an earthquake disaster condition; calculating an installation length and an installation density of the perforated steel pipe with a blade; calculating a necessary tensile force and an allowable tensile force per perforated steel pipe with a blade; and driving the perforated steel pipe with a blade having the derived installation length into the ground at the installation density.SELECTED DRAWING: Figure 1
【課題】排水機能と地盤拘束機能を同時に有する有孔鋼管の施工条件を、施工する地盤に適応して決定し、決定された有孔鋼管を、粘性土、砂質土、礫混り土、それらの複合体等どのような土質の土で施工されていた人工地盤や自然地盤であっても、確実に施工できる工法を提供する。【解決手段】鋼製の管本体の外周に螺旋羽根と地盤内の水分を排出するための水抜き孔を設けた羽根付き有孔鋼管を用いた地盤補強工法であって、施工する地盤を対象に地盤定数を設定し、現況安全率、計画安全率を設定し、必要抑止力を、常時と地震時の各状態において、計画安全率から算定し、羽根付き有孔鋼管の設置長さ、設置密度を計算し、羽根付き有孔鋼管１本当たりの必要引張力、許容引張力を算定し、求められた設置長さを有する羽根付き有孔鋼管を、前記設置密度で当該地盤に捩じ込む。【選択図】図１
GROUND REINFORCEMENT METHOD USING PERFORATED STEEL PIPE WITH BLADE
羽根付き有孔鋼管を用いた地盤補強工法
MAEDA YOSHITO (Autor:in) / HAMAZAKI TOMOHIRO (Autor:in) / FUJIWARA MASARU (Autor:in) / MIZUTA TOMIHISA (Autor:in) / NAKAISHI TAKAHIRO (Autor:in)
21.04.2016
Patent
Elektronische Ressource
Japanisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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