A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
POSITION DETERMINATION SYSTEM OF GROUND SUPPORT LAYER, AND GROUND IMPROVEMENT METHOD
To provide a position determination system of a ground support layer requiring no complicated processing to a construction facility and capable of more securely grasping a depth position of a ground support layer, and to provide a ground improvement method using the system.SOLUTION: In a ground improvement device 7 in which a plurality of shafts 8A, 8B, ... comprising a stirring blade 9 are made adjacent to each other and are moved vertically in an erected state, a probe 2a is disposed inside a guide pipe 4 above each stirring blade 9. Based on a position of the stirring blade 9 of the shafts 8A, 8B in plan view grasped by a stirring blade monitor portion 3, so as to form a movement area where the probe 2a can move downwardly without interference with each stirring blade 9 provided on the shafts 8A, 8B: a rotation angle position of at least one of the shafts 8A, 8B is controlled by a control portion 6; the probe 2a is made to pass a stirring range of an object ground B by the stirring blade 9 and move downwardly, to perform a cone penetration test; and an improved ground is formed on a support layer B1 whose depth position is grasped based on the test result using the ground improvement device 7.SELECTED DRAWING: Figure 1
【課題】施工設備に対して複雑な加工が無く、より確実に地盤支持層の深さ位置を把握できる地盤支持層の位置判断システムとこのシステムを用いた地盤改良方法を提供する。【解決手段】撹拌翼９を備えた複数本のシャフト８Ａ、８Ｂ、・・・を隣接させて立設状態で上下移動させる地盤改良装置７に対し、プローブ２ａを各撹拌翼９よりも上方のガイドパイプ４内に配置し、撹拌翼モニタ部３により把握されたシャフト８Ａ、８Ｂの撹拌翼９の平面視の位置に基づいて、プローブ２ａがシャフト８Ａ、８Ｂに備わる各撹拌翼９に干渉せずに下方移動できる移動領域を形成するように、少なくともシャフト８Ａ、８Ｂの一方の回転角度位置を制御部６により制御し、プローブ２ａを撹拌翼９による対象地盤Ｂの撹拌範囲を通過させて下方移動させてコーン貫入試験を実施し、この試験結果に基づいて深さ位置を把握した支持層Ｂ１の上に地盤改良装置７を用いて改良地盤を形成する。【選択図】図１
POSITION DETERMINATION SYSTEM OF GROUND SUPPORT LAYER, AND GROUND IMPROVEMENT METHOD
To provide a position determination system of a ground support layer requiring no complicated processing to a construction facility and capable of more securely grasping a depth position of a ground support layer, and to provide a ground improvement method using the system.SOLUTION: In a ground improvement device 7 in which a plurality of shafts 8A, 8B, ... comprising a stirring blade 9 are made adjacent to each other and are moved vertically in an erected state, a probe 2a is disposed inside a guide pipe 4 above each stirring blade 9. Based on a position of the stirring blade 9 of the shafts 8A, 8B in plan view grasped by a stirring blade monitor portion 3, so as to form a movement area where the probe 2a can move downwardly without interference with each stirring blade 9 provided on the shafts 8A, 8B: a rotation angle position of at least one of the shafts 8A, 8B is controlled by a control portion 6; the probe 2a is made to pass a stirring range of an object ground B by the stirring blade 9 and move downwardly, to perform a cone penetration test; and an improved ground is formed on a support layer B1 whose depth position is grasped based on the test result using the ground improvement device 7.SELECTED DRAWING: Figure 1
【課題】施工設備に対して複雑な加工が無く、より確実に地盤支持層の深さ位置を把握できる地盤支持層の位置判断システムとこのシステムを用いた地盤改良方法を提供する。【解決手段】撹拌翼９を備えた複数本のシャフト８Ａ、８Ｂ、・・・を隣接させて立設状態で上下移動させる地盤改良装置７に対し、プローブ２ａを各撹拌翼９よりも上方のガイドパイプ４内に配置し、撹拌翼モニタ部３により把握されたシャフト８Ａ、８Ｂの撹拌翼９の平面視の位置に基づいて、プローブ２ａがシャフト８Ａ、８Ｂに備わる各撹拌翼９に干渉せずに下方移動できる移動領域を形成するように、少なくともシャフト８Ａ、８Ｂの一方の回転角度位置を制御部６により制御し、プローブ２ａを撹拌翼９による対象地盤Ｂの撹拌範囲を通過させて下方移動させてコーン貫入試験を実施し、この試験結果に基づいて深さ位置を把握した支持層Ｂ１の上に地盤改良装置７を用いて改良地盤を形成する。【選択図】図１
POSITION DETERMINATION SYSTEM OF GROUND SUPPORT LAYER, AND GROUND IMPROVEMENT METHOD
地盤支持層の位置判断システムおよび地盤改良方法
SAEGUSA HIROYUKI (author) / NISHIDA KOTA (author) / FUJIYAMA EI (author) / OGAWA KAZUKI (author) / FUKUDA AKIHIRO (author) / OGAWA KOJI (author)
2021-05-20
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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