沉管隧道差异沉降容许值的计算
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摘要
作为一种重要的跨越交通工具,沉管隧道逐渐被广泛采用。由于其结构的特殊性,管节接头是整个沉管隧道的薄弱环节,在地基刚度不均匀变化、上部不均匀载荷等因素的共同作用和影响下,沉管隧道不可避免地会发生差异沉降,并且过大的差异沉降对沉管隧道安全造成直接威胁。通过弹性地基梁的沉管隧道纵向计算理论,结合沉管隧道各管节沉降监测数据,计算出沉管隧道各管节的容许差异沉降值。结果表明各值均在容许值之内,说明该沉管隧道结构目前处于安全状态。
The immersed tunnel is gradually being widely adopted as an important cross-vehicle. Due to the special structure of a immersed tunnel,the pipe joint becomes a weak link of the whole immersed tunnel. Under the joint action and influence of unevenness of foundation stiffness and uneven upper load,immersed tunnels generally have differential settlement,and excessive differential settlement directly threatens the safety of the immersed tunnel. Based on the longitudinal calculation theory of immersed tunnels of elastic foundation beams,and combined with the monitoring data of the settlements of the immersed tunnel,the allowable differential settlement values of the various pipe segments of the immersed tunnel are calculated. The results show that the values are within the allowable value,indicating that the immersed tunnel structure is currently in a safe state.
The immersed tunnel is gradually being widely adopted as an important cross-vehicle. Due to the special structure of a immersed tunnel,the pipe joint becomes a weak link of the whole immersed tunnel. Under the joint action and influence of unevenness of foundation stiffness and uneven upper load,immersed tunnels generally have differential settlement,and excessive differential settlement directly threatens the safety of the immersed tunnel. Based on the longitudinal calculation theory of immersed tunnels of elastic foundation beams,and combined with the monitoring data of the settlements of the immersed tunnel,the allowable differential settlement values of the various pipe segments of the immersed tunnel are calculated. The results show that the values are within the allowable value,indicating that the immersed tunnel structure is currently in a safe state.
引文
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[4]本刊编辑部.港珠澳大桥开通历时15年完成创下6项世界之最[J].隧道建设(中英文),2018,38(10):1602.
[5]张庆贺,高卫平.水域沉管隧道基础处理方法的对比分析[J].岩土力学,2003(S2):349-352.
[6]李剑,李清富,李冰.沉管隧道沉降控制的计算分析[J].郑州大学学报(工学版),2002(3):94-97.
[7]谢雄耀,王培,李永盛,等.甬江沉管隧道长期沉降监测数据及有限元分析[J].岩土力学,2014,35(8):2314-2324.
[8] Grantz W C. Immersed tunnel settlements:Part 2:Case Histories[J]. Tunnelling&Underground Space Technology,2001,16(3):203-210.
[9]潘永仁,彭俊,Naotake Saito.上海外环沉管隧道管段基础压砂法施工技术[J].现代隧道技术,2004(1):41-45.
[10]梁禹.广州地铁一号线越江隧道运营期结构变形监测[J].现代隧道技术,2008(3):84-87.
[11]徐国平,李毅,付佰勇,等.沉管隧道纵向差异沉降容许值的简化计算方法[J].公路,2015,60(4):22-27.
[12]龙驭球.弹性地基梁的计算[M].北京:人民教育出版社,1982.
[2] Grantz W C. Immersed Tunnel Settlements. Part 1:Nature of Settlements[J]. Tunnelling and Underground Space Technology,2001,16(3):195-201.
[3]张秀振.港珠澳大桥沉管隧道最终接头测控技术[J].中国港湾建设,2018,38(10):60-64.
[4]本刊编辑部.港珠澳大桥开通历时15年完成创下6项世界之最[J].隧道建设(中英文),2018,38(10):1602.
[5]张庆贺,高卫平.水域沉管隧道基础处理方法的对比分析[J].岩土力学,2003(S2):349-352.
[6]李剑,李清富,李冰.沉管隧道沉降控制的计算分析[J].郑州大学学报(工学版),2002(3):94-97.
[7]谢雄耀,王培,李永盛,等.甬江沉管隧道长期沉降监测数据及有限元分析[J].岩土力学,2014,35(8):2314-2324.
[8] Grantz W C. Immersed tunnel settlements:Part 2:Case Histories[J]. Tunnelling&Underground Space Technology,2001,16(3):203-210.
[9]潘永仁,彭俊,Naotake Saito.上海外环沉管隧道管段基础压砂法施工技术[J].现代隧道技术,2004(1):41-45.
[10]梁禹.广州地铁一号线越江隧道运营期结构变形监测[J].现代隧道技术,2008(3):84-87.
[11]徐国平,李毅,付佰勇,等.沉管隧道纵向差异沉降容许值的简化计算方法[J].公路,2015,60(4):22-27.
[12]龙驭球.弹性地基梁的计算[M].北京:人民教育出版社,1982.