Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
METHOD AND DEVICE FOR MEASURING SATURATION DEGREE OF SUBSOIL
To provide a method and a device for measuring a saturation degree of a subsoil which can directly measure a saturation degree of a subsoil with high accuracy.SOLUTION: A method for measuring a saturation degree of a subsoil comprises: a frozen soil sample collecting step 3 of freezing a sample in a subsoil and collecting the frozen sample; a first mass measuring step 4 of measuring a mass of the frozen soil sample; an ice film forming step 5 of covering an outer periphery of the frozen soil sample after measuring the mass with ice; a second mass measuring step 6 of measuring a mass of the frozen soil sample covered with the ice; a volume measuring step 8 of thawing the frozen soil sample covered with the ice at the outer periphery by sinking into water, storing air remaining in voids inside the frozen soil sample in the water, applying water pressure to the air so that the water pressure is substantially the same as that at the time of existing in the soil, and measuring volume of the air when the water pressure is applied; and a saturation degree calculating step 9 of, based on a void volume of the frozen soil sample calculated from a mass and a specific gravity of a soil particle in the thawed frozen soil sample and the volume of the air measured in the volume measuring step 8, calculating volume of the water existing in the voids in the frozen soil sample and calculating the saturation degree of the subsoil.SELECTED DRAWING: Figure 1
【課題】地盤の飽和度を直接的に高い精度で測定できる地盤の飽和度測定方法及び飽和度測定装置を提供する。【解決手段】地盤内の試料を凍結させ、凍結した試料を採取する凍土試料採取工程３と、凍土試料の質量を測定する第１質量測定工程４と、質量測定後の凍土試料の外周を氷で覆う氷皮膜作成工程５と、氷で覆われた凍土試料の質量を測定する第２質量測定工程６と、外周を氷で覆われた凍土試料を水中に沈めて解凍し、凍土試料の内部の間隙に残留していた空気を水中に留め、かつ、前記空気に対して土中に存在する時と略同圧力となるように水圧を付加し、その水圧を付加した時の前記空気の体積を測定する体積測定工程８と、前記解凍された凍土試料の土粒子の質量と比重から算出した凍土試料の間隙容積及び体積測定工程８で測定した空気の体積から、前記凍土試料の間隙に存在した水の容積を算出し、地盤の飽和度を算出する飽和度算出工程９とで構成される。【選択図】図１
METHOD AND DEVICE FOR MEASURING SATURATION DEGREE OF SUBSOIL
To provide a method and a device for measuring a saturation degree of a subsoil which can directly measure a saturation degree of a subsoil with high accuracy.SOLUTION: A method for measuring a saturation degree of a subsoil comprises: a frozen soil sample collecting step 3 of freezing a sample in a subsoil and collecting the frozen sample; a first mass measuring step 4 of measuring a mass of the frozen soil sample; an ice film forming step 5 of covering an outer periphery of the frozen soil sample after measuring the mass with ice; a second mass measuring step 6 of measuring a mass of the frozen soil sample covered with the ice; a volume measuring step 8 of thawing the frozen soil sample covered with the ice at the outer periphery by sinking into water, storing air remaining in voids inside the frozen soil sample in the water, applying water pressure to the air so that the water pressure is substantially the same as that at the time of existing in the soil, and measuring volume of the air when the water pressure is applied; and a saturation degree calculating step 9 of, based on a void volume of the frozen soil sample calculated from a mass and a specific gravity of a soil particle in the thawed frozen soil sample and the volume of the air measured in the volume measuring step 8, calculating volume of the water existing in the voids in the frozen soil sample and calculating the saturation degree of the subsoil.SELECTED DRAWING: Figure 1
【課題】地盤の飽和度を直接的に高い精度で測定できる地盤の飽和度測定方法及び飽和度測定装置を提供する。【解決手段】地盤内の試料を凍結させ、凍結した試料を採取する凍土試料採取工程３と、凍土試料の質量を測定する第１質量測定工程４と、質量測定後の凍土試料の外周を氷で覆う氷皮膜作成工程５と、氷で覆われた凍土試料の質量を測定する第２質量測定工程６と、外周を氷で覆われた凍土試料を水中に沈めて解凍し、凍土試料の内部の間隙に残留していた空気を水中に留め、かつ、前記空気に対して土中に存在する時と略同圧力となるように水圧を付加し、その水圧を付加した時の前記空気の体積を測定する体積測定工程８と、前記解凍された凍土試料の土粒子の質量と比重から算出した凍土試料の間隙容積及び体積測定工程８で測定した空気の体積から、前記凍土試料の間隙に存在した水の容積を算出し、地盤の飽和度を算出する飽和度算出工程９とで構成される。【選択図】図１
METHOD AND DEVICE FOR MEASURING SATURATION DEGREE OF SUBSOIL
地盤の飽和度測定方法及び飽和度測定装置
SAKAI KAZUO (Autor:in) / OKAMURA MITSU (Autor:in) / YUGAWA HIRONORI (Autor:in) / NAKAJIMA KEISUKE (Autor:in) / TACHIKAWA HIDEO (Autor:in) / TACHIKAWA TOMOKATSU (Autor:in)
24.01.2019
Patent
Elektronische Ressource
Japanisch
| Europäisches Patentamt | 2019
SUBSOIL MODIFICATION METHOD, AND SUBSOIL MODIFICATION BODY
| Europäisches Patentamt | 2021
SUBSOIL REINFORCEMENT METHOD AND CASING FOR SUBSOIL REINFORCEMENT
| Europäisches Patentamt | 2019
| Wiley | 2012
Wiley | 2015