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A platform for research: civil engineering, architecture and urbanism
GROUND IMPROVEMENT METHOD AND IMPROVED GROUND
PROBLEM TO BE SOLVED: To solve at least a part of a problem in a conventional liquefaction countermeasure technology.SOLUTION: In a ground improvement method, a plurality of low void-ratio regions which are formed into an island shape when viewed from above on the ground whose underground water level is 1,300 mm or deeper, and which are covered with a first water non-permeable sheet at bottom faces and side faces, and high void-ratio regions which are formed into a net shape so as to surround the low void-ratio regions when viewed from above, and higher in void ratios than the low void-ratio regions are formed so that depths from the uppermost part of the low-void-ratio regions and the uppermost part of the high void-ratio regions up to the ground surface are deeper than 500 mm, and depths from the lowermost part of the low-void-ratio regions and the lowermost part of the high void-ratio regions up to the ground surface are shallower than 1,300 mm, after that, a second water non-permeable sheet is arranged on a clearance between a plurality of the low void-ratio regions and the high void-ratio regions so as to water-tightly cover a plurality of the low void-ratio regions and the high void-ratio regions, and water is made to pass between the first water non-permeable sheet and the second water non-permeable sheet.SELECTED DRAWING: Figure 1
【課題】従来の液状化対策技術が有する問題の少なくとも一部を軽減する。【解決手段】地下水位が１３００ｍｍ以深の土地において、上方から見て島状に形成され、かつ、底面および側面を第１非透水性シートで覆われた、複数の低空隙率領域と、上方から見て低空隙率領域を取り囲むように網状をなし、かつ、低空隙率領域よりも空隙率の高い、高空隙率領域とを、低空隙率領域の最上部および高空隙率領域の最上部の地面からの深さが５００ｍｍより深く、かつ、低空隙率領域の最下部および高空隙率領域の最下部の地面からの深さが１３００ｍｍより浅くなるように、形成し、その後、複数の低空隙率領域と高空隙率領域との上に、複数の低空隙率領域と高空隙率領域とを水密に覆うように、第２非透水性シートを配置し、第１非透水性シートと第２非透水性シートとの間を水が通過可能とする、地盤改良工法。【選択図】図１
GROUND IMPROVEMENT METHOD AND IMPROVED GROUND
PROBLEM TO BE SOLVED: To solve at least a part of a problem in a conventional liquefaction countermeasure technology.SOLUTION: In a ground improvement method, a plurality of low void-ratio regions which are formed into an island shape when viewed from above on the ground whose underground water level is 1,300 mm or deeper, and which are covered with a first water non-permeable sheet at bottom faces and side faces, and high void-ratio regions which are formed into a net shape so as to surround the low void-ratio regions when viewed from above, and higher in void ratios than the low void-ratio regions are formed so that depths from the uppermost part of the low-void-ratio regions and the uppermost part of the high void-ratio regions up to the ground surface are deeper than 500 mm, and depths from the lowermost part of the low-void-ratio regions and the lowermost part of the high void-ratio regions up to the ground surface are shallower than 1,300 mm, after that, a second water non-permeable sheet is arranged on a clearance between a plurality of the low void-ratio regions and the high void-ratio regions so as to water-tightly cover a plurality of the low void-ratio regions and the high void-ratio regions, and water is made to pass between the first water non-permeable sheet and the second water non-permeable sheet.SELECTED DRAWING: Figure 1
【課題】従来の液状化対策技術が有する問題の少なくとも一部を軽減する。【解決手段】地下水位が１３００ｍｍ以深の土地において、上方から見て島状に形成され、かつ、底面および側面を第１非透水性シートで覆われた、複数の低空隙率領域と、上方から見て低空隙率領域を取り囲むように網状をなし、かつ、低空隙率領域よりも空隙率の高い、高空隙率領域とを、低空隙率領域の最上部および高空隙率領域の最上部の地面からの深さが５００ｍｍより深く、かつ、低空隙率領域の最下部および高空隙率領域の最下部の地面からの深さが１３００ｍｍより浅くなるように、形成し、その後、複数の低空隙率領域と高空隙率領域との上に、複数の低空隙率領域と高空隙率領域とを水密に覆うように、第２非透水性シートを配置し、第１非透水性シートと第２非透水性シートとの間を水が通過可能とする、地盤改良工法。【選択図】図１
GROUND IMPROVEMENT METHOD AND IMPROVED GROUND
地盤改良工法および改良地盤
IHARA TAKESHI (author) / IHARA TENRIYOKU (author)
2017-02-16
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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