A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
VERTICAL SHAFT CONSTRUCTION METHOD
PROBLEM TO BE SOLVED: To provide a vertical shaft construction method for readily constructing a vertical shaft under a low overhead clearance, while preventing collapsing of a borehole wall while constructing the vertical shaft.SOLUTION: A vertical shaft construction method includes the following steps for: forming a cylindrical underground continuous wall body 3 comprising a plurality of ground improvement bodies 3a, such that an outer peripheral edge L of a planned construction area of a side wall body 2 is positioned between an outer peripheral surface and an inner peripheral surface of the underground continuous wall body; excavating a portion inside of the outer peripheral edge L; and forming the side wall body 2 along an excavated surface W and constructing a vertical shaft 1. The step for forming the underground continuous wall body 3 includes the following steps for: forming a borehole in each of planned areas to construct the ground improvement bodies 3a; inserting a rod into the borehole, the rod including a tip rod, a nozzle, and an extension rod; and constructing a ground improvement body 3a having strength greater than a ground, by rotating and pulling up the rod while spraying a liquid containing a solidification material and water from the nozzle.SELECTED DRAWING: Figure 2
【課題】低空頭下において、立坑構築中における孔壁の崩壊を防止しつつ立坑を容易に構築可能な立坑構築方法を提供する。【解決手段】立坑構築方法であって、複数の地盤改良体３ａからなる筒状の地中連続壁体３をその外周面と内周面との間に側壁体２の構築予定領域の外周縁Ｌが位置するように形成することと、外周縁Ｌより内側に位置する部分を掘削することと、掘削面Ｗに沿って側壁体２を形成して立坑１を構築することと、を含み、地中連続壁体３を形成することは、一つの地盤改良体３ａの造成予定領域毎に、ボーリング孔を形成することと、先端ロッドとノズルと延長ロッドとを有するロッドをボーリング孔に挿入することと、固化材と水を含む液体をノズルから噴射しつつ、ロッドを回転させると共に引き上げて、地盤より強度の高い地盤改良体３ａを造成することと、を含む構成とする。【選択図】図２
VERTICAL SHAFT CONSTRUCTION METHOD
PROBLEM TO BE SOLVED: To provide a vertical shaft construction method for readily constructing a vertical shaft under a low overhead clearance, while preventing collapsing of a borehole wall while constructing the vertical shaft.SOLUTION: A vertical shaft construction method includes the following steps for: forming a cylindrical underground continuous wall body 3 comprising a plurality of ground improvement bodies 3a, such that an outer peripheral edge L of a planned construction area of a side wall body 2 is positioned between an outer peripheral surface and an inner peripheral surface of the underground continuous wall body; excavating a portion inside of the outer peripheral edge L; and forming the side wall body 2 along an excavated surface W and constructing a vertical shaft 1. The step for forming the underground continuous wall body 3 includes the following steps for: forming a borehole in each of planned areas to construct the ground improvement bodies 3a; inserting a rod into the borehole, the rod including a tip rod, a nozzle, and an extension rod; and constructing a ground improvement body 3a having strength greater than a ground, by rotating and pulling up the rod while spraying a liquid containing a solidification material and water from the nozzle.SELECTED DRAWING: Figure 2
【課題】低空頭下において、立坑構築中における孔壁の崩壊を防止しつつ立坑を容易に構築可能な立坑構築方法を提供する。【解決手段】立坑構築方法であって、複数の地盤改良体３ａからなる筒状の地中連続壁体３をその外周面と内周面との間に側壁体２の構築予定領域の外周縁Ｌが位置するように形成することと、外周縁Ｌより内側に位置する部分を掘削することと、掘削面Ｗに沿って側壁体２を形成して立坑１を構築することと、を含み、地中連続壁体３を形成することは、一つの地盤改良体３ａの造成予定領域毎に、ボーリング孔を形成することと、先端ロッドとノズルと延長ロッドとを有するロッドをボーリング孔に挿入することと、固化材と水を含む液体をノズルから噴射しつつ、ロッドを回転させると共に引き上げて、地盤より強度の高い地盤改良体３ａを造成することと、を含む構成とする。【選択図】図２
VERTICAL SHAFT CONSTRUCTION METHOD
立坑構築方法
TANAKA MAKOTO (author) / HAYAKAWA HIROHISA (author) / OHASHI MASAAKI (author) / ITO HIROYUKI (author) / FUJISAKI KATSUTOSHI (author) / MATSUI MASAKI (author) / SHIMAMURA JUN (author) / TANAKA SEIJI (author)
2017-05-25
Patent
Electronic Resource
Japanese
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