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工事中の中間漂流なしのダブルアーチトンネルの機械反応機構とパラメータ最適化
Junwu Chen1,2, Feng Huang3,4, Song Wang5,6
1School of Civil Engineering, Beijing Jiaotong University, Beiijing, 100044, China.
Scientific reports
|September 2, 2025
まとめ
真ん中のドリフトなしの二次トンネルを掘削すると,前方のトンネルの変形と裏面のストレスが著しく増加します. 掘削方法の最適化と 12mの距離のような顔の揺れが これらの悪影響を軽減します
科学分野:
- 地理工学
- トンネル工学
- 土木工学
背景:
- 中央のドリフトのないダブルアーチトンネルは,建設効率とコストの利点を提供します.
- 隣接するトンネルの掘削は,既存のトンネル内部の構造的な混乱と不安定性を引き起こします.
- トンネルを安全に建設するには 連続掘削中の機械反応を理解することが重要です
研究 の 目的:
- 構造的な機械的反応と,中間漂流のない二重アーチトンネルの建設中の故障の進化を調査する.
- 前方のトンネルのストレスメカニズムに対する二次トンネル掘削の影響を明らかにする.
- 異なる掘削方法,映像,面のオフセットの構造的ストレスへの影響を比較する.
主な方法:
- 中国におけるシンマジェトンネルプロジェクトのケーススタディ
- 物理モデルの実験
- 有限要素シミュレーション分析
- 掘削パラメータの比較分析
主要な成果:
- 周囲の岩石の変形は 3段階のパターンである.急速な増加,急速な減少,そして緩やかな増加である.
- 二次トンネルの掘削により,前方のトンネルのアーチ冠の沈殿量が25.56%増加しました.
- 腰の右側が 最大の軸の力と 屈折モントムを示し ストレスの濃度を示した.
- 壁面の亀裂は 主にアーチ・ショルダーやアーチ・クラウンや 逆向きのアーチといった 弱い部位で発生しました
結論:
- 掘削方法 (左から右) と小さな掘削映像は,干渉とストレス濃度を減らす.
- トンネル面の間の 12 m の分岐距離は,沈殿とプラスチックゾーンの拡張を制御するために最適です.
- これらの発見は,同様のトンネル設計と建設のための貴重なパラメータ参照を提供します.
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