地铁车站大断面隧道预留T型岩梁开挖方法研究
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摘要
依托重庆轨道交通四号线虾子蝙地铁工程,对预留T型岩梁开挖方法开展研究。采用数值模拟方法,分别对双侧壁导坑法、预留十字岩梁法和预留T型岩梁法进行了模拟,分析了隧道开挖支护后产生的拱顶沉降、净空收敛、地表沉降和初期支护弯矩值。结果表明:预留T型岩梁开挖方法能有效控制开挖过程围岩位移变化和隧道初支在开挖期间承受的弯矩,更适合用于大断面隧道的施工。研究成果对虾子蝙隧道及类似工程具有一定参考价值。
In this paper,the research on the excavation method of T-type rock beam is carried out relying on xiazibian subway station. The excavation process of the cross-type rock beam method,the double-side-drift method and the reserved T-rock pillar method are simulated by using numerical simulation method. By analyzing the settlement value of the tunnel vault,tunnel clearance convergence,the surface subsidence value and the bending moments of the initial support,the research results show that the reserved T-rock pillar method is more suitable for the construction of large-section tunnel. The research results have certain reference value for xiazibian tunnel and similar project.
In this paper,the research on the excavation method of T-type rock beam is carried out relying on xiazibian subway station. The excavation process of the cross-type rock beam method,the double-side-drift method and the reserved T-rock pillar method are simulated by using numerical simulation method. By analyzing the settlement value of the tunnel vault,tunnel clearance convergence,the surface subsidence value and the bending moments of the initial support,the research results show that the reserved T-rock pillar method is more suitable for the construction of large-section tunnel. The research results have certain reference value for xiazibian tunnel and similar project.
引文
[1]晋学辉.红旗河沟大型暗挖车站施工力学研究[D].重庆:重庆交通大学,2012.
[2]徐强.礼嘉车站大断面小净距隧道进洞施工技术[J].现代隧道技术,2011,48(6):146-149.
[3]邓治纲,吴敏慧,张庆贺.大型地铁十字换乘车站施工阶段变形预测[C].岩土工程数值方法与高性能计算学术研讨会暨中国岩石力学与工程学会岩体物理与数学模拟专委会年会.2007.
[4]刘新荣,孙翔,蒋树屏,等.四车道公路隧道特点及其所需解决的几个问题[J].地下空间与工程学报,2003,23(4):437-439.
[5]施仲衡.浅埋暗挖法设计理论论述[J].现代隧道技术,2005,42(2):37-39.
[6]刘惠敏,赵月,吴波.CRD法不同施工工序的比较与分析[J].隧道建设,2005,25(5):6-10.
[7]岳广学,何平,蔡炜.隧道开挖过程中地层变形的统计分析[J].岩石力学与工程学报,2007,26(S2):3793-3803.
[8]吴秋良,王翔.IV级围岩地铁暗挖车站开挖工法探讨[J].重庆建筑2014(7):23-25.
[9]周晓陵,鲁治,丁卫中,等.大断面老山隧道洞身开挖施工工艺分析[J].公路隧道,2007(1):30-35.
[10]黄明利,谭忠盛,郭家,等.特大断面超浅埋隧道预留十字岩梁岩柱开挖技术[J].岩石力学与工程学报,2013,32(2):299-307.
[11]屈铁军,徐建,石云兴.同受力状态的钢筋混凝土构件的等效弹性模量[J].混凝土,2016(11):119-122.
[2]徐强.礼嘉车站大断面小净距隧道进洞施工技术[J].现代隧道技术,2011,48(6):146-149.
[3]邓治纲,吴敏慧,张庆贺.大型地铁十字换乘车站施工阶段变形预测[C].岩土工程数值方法与高性能计算学术研讨会暨中国岩石力学与工程学会岩体物理与数学模拟专委会年会.2007.
[4]刘新荣,孙翔,蒋树屏,等.四车道公路隧道特点及其所需解决的几个问题[J].地下空间与工程学报,2003,23(4):437-439.
[5]施仲衡.浅埋暗挖法设计理论论述[J].现代隧道技术,2005,42(2):37-39.
[6]刘惠敏,赵月,吴波.CRD法不同施工工序的比较与分析[J].隧道建设,2005,25(5):6-10.
[7]岳广学,何平,蔡炜.隧道开挖过程中地层变形的统计分析[J].岩石力学与工程学报,2007,26(S2):3793-3803.
[8]吴秋良,王翔.IV级围岩地铁暗挖车站开挖工法探讨[J].重庆建筑2014(7):23-25.
[9]周晓陵,鲁治,丁卫中,等.大断面老山隧道洞身开挖施工工艺分析[J].公路隧道,2007(1):30-35.
[10]黄明利,谭忠盛,郭家,等.特大断面超浅埋隧道预留十字岩梁岩柱开挖技术[J].岩石力学与工程学报,2013,32(2):299-307.
[11]屈铁军,徐建,石云兴.同受力状态的钢筋混凝土构件的等效弹性模量[J].混凝土,2016(11):119-122.