A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
MAINTENANCE METHOD OF FROZEN SOIL AND CONSTRUCTION METHOD OF FROZEN SOIL
To provide a maintenance method of frozen soil and a construction method of frozen soil which can construct frozen soil in a short period and which can properly maintain frozen soil thickness by preventing thawing and excessive formation of a frozen soil.SOLUTION: A plurality of freezing pipes 5 are arranged on a freezing pipe arrangement line 3 on a ground 1. A horizontal freezing pipe 15 is disposed on a ground surface 1a near the freezing pipe arrangement line 3 as freezing promotion means for preventing temperature increase in the vicinity of the ground surface 1a, and a heat insulation material 17 is laid thereon. A freezing coolant is circulated inside the plurality of freezing pipes 5 with using the freezing promotion means, and frozen soil 11 is constructed so as to construct a frozen soil type impervious wall. Then, a thickness of the frozen soil 11 is estimated based on an underground temperature measured at a position of a temperature measuring pipe 7, and the frozen soil type impervious wall 9 is maintained and managed by using freezing suppression means such as an intermittent operation of the freezing pipe 5 in a section where the thickness is determined to be larger than a predetermined thickness 18 and using the freezing promotion means in a section where the thickness is determined to be smaller than the predetermined thickness..SELECTED DRAWING: Figure 2
【課題】短期間で凍土を造成するとともに、凍土の融解や過剰生成を防止して凍土厚を適切に維持することができる凍土の維持方法および凍土の造成方法を提供すること。【解決手段】地盤１の凍結管配置ライン３上に複数の凍結管５を配置する。また、地表面１ａ近傍の温度上昇を防止するための凍結推進手段として、凍結管配置ライン３付近の地表面１ａ上に水平凍結管１５を設置し、その上から断熱材１７を敷設する。そして、凍結推進手段を用いつつ、複数の凍結管５の内部に凍結冷媒を循環させて凍土１１を造成して凍土方式遮水壁を構築する。その後、測温管７の位置で計測した地中温度に基づいて凍土１１の厚さを推定し、厚さが所定厚さ１８より大きいと判断された区間に凍結管５の間欠運転等の凍結抑制手段を用い、厚さが所定厚さより小さいと判断された区間に凍結推進手段を用いて、凍土方式遮水壁９を維持管理する。【選択図】図２
MAINTENANCE METHOD OF FROZEN SOIL AND CONSTRUCTION METHOD OF FROZEN SOIL
To provide a maintenance method of frozen soil and a construction method of frozen soil which can construct frozen soil in a short period and which can properly maintain frozen soil thickness by preventing thawing and excessive formation of a frozen soil.SOLUTION: A plurality of freezing pipes 5 are arranged on a freezing pipe arrangement line 3 on a ground 1. A horizontal freezing pipe 15 is disposed on a ground surface 1a near the freezing pipe arrangement line 3 as freezing promotion means for preventing temperature increase in the vicinity of the ground surface 1a, and a heat insulation material 17 is laid thereon. A freezing coolant is circulated inside the plurality of freezing pipes 5 with using the freezing promotion means, and frozen soil 11 is constructed so as to construct a frozen soil type impervious wall. Then, a thickness of the frozen soil 11 is estimated based on an underground temperature measured at a position of a temperature measuring pipe 7, and the frozen soil type impervious wall 9 is maintained and managed by using freezing suppression means such as an intermittent operation of the freezing pipe 5 in a section where the thickness is determined to be larger than a predetermined thickness 18 and using the freezing promotion means in a section where the thickness is determined to be smaller than the predetermined thickness..SELECTED DRAWING: Figure 2
【課題】短期間で凍土を造成するとともに、凍土の融解や過剰生成を防止して凍土厚を適切に維持することができる凍土の維持方法および凍土の造成方法を提供すること。【解決手段】地盤１の凍結管配置ライン３上に複数の凍結管５を配置する。また、地表面１ａ近傍の温度上昇を防止するための凍結推進手段として、凍結管配置ライン３付近の地表面１ａ上に水平凍結管１５を設置し、その上から断熱材１７を敷設する。そして、凍結推進手段を用いつつ、複数の凍結管５の内部に凍結冷媒を循環させて凍土１１を造成して凍土方式遮水壁を構築する。その後、測温管７の位置で計測した地中温度に基づいて凍土１１の厚さを推定し、厚さが所定厚さ１８より大きいと判断された区間に凍結管５の間欠運転等の凍結抑制手段を用い、厚さが所定厚さより小さいと判断された区間に凍結推進手段を用いて、凍土方式遮水壁９を維持管理する。【選択図】図２
MAINTENANCE METHOD OF FROZEN SOIL AND CONSTRUCTION METHOD OF FROZEN SOIL
凍土の維持方法および凍土の造成方法
TAMAI TAKESHI (author) / KATO HIROYUKI (author) / KONO ICHIRO (author) / YOSHIDA TERU (author) / KIDA HIROMITSU (author) / FUKADA ATSUHIRO (author) / WATANABE KENJI (author) / EZAKI TAICHI (author)
2019-07-04
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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