JP2017186858A - 凍結工法の凍結膨張圧算出方法 - Google Patents
凍結工法の凍結膨張圧算出方法 Download PDFInfo
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- freezing
- expansion pressure
- frozen
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- frozen soil
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
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但し、本発明の凍結工法の凍結膨張圧算出方法は、土木建築分野において凍結工法を用いるあらゆるケースに適用可能である。
ここで、凍結膨張解析は、凍結膨張圧の算出への適用が難しいレベルであるが、本願の発明者らは、モデル化により凍土膨張率の異方性や凍土成長段階の解析には凍結膨張解析を十分に適用できることを見出し、本実施形態の凍結工法の凍結膨張圧算出方法において、凍土成長段階に応じた凍結線膨張率を算出する手段としてのみ、この凍結膨張解析を適用することとした。
すなわち、実際の検討事例の凍土厚3.5m、ドーム型の凍土造成ケースにおいて、従来の高志による無限円筒の式による凍結膨張圧算出結果が1114kN/m2であるのに対し、本手法では凍結膨張圧668kN/m2という結果が得られ、合理的な施工を実現できることが実証されている。
2 ランプシールド
3 地中発進基地
4 外殻シールド
5 凍土壁
6 本設覆工
7 凍結管
10 凍土領域
11 凍土領域
12 凍土領域
13 凍土領域
14 凍土領域
Claims (1)
- 凍結工法を用いて地盤を凍結させる際の凍結膨張圧を算出する方法であって、
凍結運転開始から凍土が繋がり、凍土が繋がって必要な凍土厚に造成され、造成した凍土を維持するまでの凍土成長過程を段階的に分け、各凍土成長段階における線膨張率を求め、該線膨張率と高志による無限円筒の式とを用いて所望の位置の地盤の膨張圧を求めるようにしたこと特徴とする凍結工法の凍結膨張圧算出方法。
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Cited By (5)
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---|---|---|---|---|
JP2019143332A (ja) * | 2018-02-19 | 2019-08-29 | 清水建設株式会社 | 地盤の凍結膨張解析方法 |
JP2020041405A (ja) * | 2018-09-05 | 2020-03-19 | 前田建設工業株式会社 | 凍結地盤の評価方法、及び凍結地盤の評価装置 |
CN113468630A (zh) * | 2021-05-13 | 2021-10-01 | 海南大学 | 一种盾构隧道始发端头加固方案优化方法 |
JP2021534372A (ja) * | 2019-07-30 | 2021-12-09 | 中国鉱業大学 | 3軸加圧凍結製氷方法 |
CN115450642A (zh) * | 2022-11-08 | 2022-12-09 | 西南交通大学 | 一种基于大数据的盾构姿态控制方法及系统 |
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2016
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Non-Patent Citations (1)
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019143332A (ja) * | 2018-02-19 | 2019-08-29 | 清水建設株式会社 | 地盤の凍結膨張解析方法 |
JP7089891B2 (ja) | 2018-02-19 | 2022-06-23 | 清水建設株式会社 | 地盤の凍結膨張解析方法 |
JP2020041405A (ja) * | 2018-09-05 | 2020-03-19 | 前田建設工業株式会社 | 凍結地盤の評価方法、及び凍結地盤の評価装置 |
JP7273663B2 (ja) | 2018-09-05 | 2023-05-15 | 前田建設工業株式会社 | 凍結地盤の評価方法、及び凍結地盤の評価装置 |
JP2021534372A (ja) * | 2019-07-30 | 2021-12-09 | 中国鉱業大学 | 3軸加圧凍結製氷方法 |
JP7044418B2 (ja) | 2019-07-30 | 2022-03-30 | 中国鉱業大学 | 3軸加圧凍結製氷方法 |
CN113468630A (zh) * | 2021-05-13 | 2021-10-01 | 海南大学 | 一种盾构隧道始发端头加固方案优化方法 |
WO2022236955A1 (zh) * | 2021-05-13 | 2022-11-17 | 海南大学 | 一种盾构隧道始发端头加固方案优化方法 |
CN113468630B (zh) * | 2021-05-13 | 2023-08-25 | 海南大学 | 一种盾构隧道始发端头加固方案优化方法 |
CN115450642A (zh) * | 2022-11-08 | 2022-12-09 | 西南交通大学 | 一种基于大数据的盾构姿态控制方法及系统 |
CN115450642B (zh) * | 2022-11-08 | 2023-02-17 | 西南交通大学 | 一种基于大数据的盾构姿态控制方法及系统 |
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