管廊接头变形对接头防渗性能的影响
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摘要
针对地下综合管廊渗漏规律不明确的现状,文中建立有限差分模型,首先对相邻两节段管廊施加荷载,对比分析单舱、双舱、三舱管廊在不同接头构造下、不同止水橡胶垫初始应力情况下,管廊接头渗漏的临界转角规律。结果表明,无论预应力钢筋连接还是螺栓连接,单舱、双舱、三舱管廊的连接处转角都与荷载成正比例关系,且预应力钢筋连接比螺栓连接防水性能好。沉降缝处的转角也与荷载成正比例关系,并且防水性能主要取决于止水橡胶垫的初始应力,与管片结构刚度关系不大。最后,以上海某隧道实际沉降数据为依据,研究管廊在不同沉降阶段止水橡胶垫和接头螺栓的受力,分析管廊沉降破坏模式。
The leakage of the utility tunnel joint has not been well studied. A series numerical models were developed to investigate the waterproof performance of the deformed joints. Two adjacent rings of utility tunnel was applied uniformly distributed load to obtain the critical opening angle of leakage for the joints in utility tunnels with single cabin, double cabins and three cabins, under different joint style and initial stress of waterproof rubber. The results show that the deformation angles of joint in utility tunnel without single cabin,double cabins and three cabins are all proportional to the applied load linearly, despite of the different joint styles(prestressed-steel-bar connection and bolt connection). The waterproof performance of the joint with prestressed-steel-bar connection is better than that with the bolt connection. Waterproof performance mainly depends on the initial stress of the rubber, and is slightly influenced by the segment stiffness. The deformation angle of the settlement joint is also proportional to the load. Based on the settlement curve of a tunnel in Shanghai, the stress of the waterproof rubber and joint bolts were analyzed and the failure mode of tunnel joint were also investigated.
The leakage of the utility tunnel joint has not been well studied. A series numerical models were developed to investigate the waterproof performance of the deformed joints. Two adjacent rings of utility tunnel was applied uniformly distributed load to obtain the critical opening angle of leakage for the joints in utility tunnels with single cabin, double cabins and three cabins, under different joint style and initial stress of waterproof rubber. The results show that the deformation angles of joint in utility tunnel without single cabin,double cabins and three cabins are all proportional to the applied load linearly, despite of the different joint styles(prestressed-steel-bar connection and bolt connection). The waterproof performance of the joint with prestressed-steel-bar connection is better than that with the bolt connection. Waterproof performance mainly depends on the initial stress of the rubber, and is slightly influenced by the segment stiffness. The deformation angle of the settlement joint is also proportional to the load. Based on the settlement curve of a tunnel in Shanghai, the stress of the waterproof rubber and joint bolts were analyzed and the failure mode of tunnel joint were also investigated.
引文
[1]GB 50838-2015城市综合管廊工程技术规范[S].北京:中国计划出版社,2015(GB 50838-2015 Technical code for urban utility tunnel engineering[S].Beijing:China Planning Press,2015(in Chinese))
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[9]王如路.上海地铁盾构隧道纵向变形分析[J].地下工程与隧道,2009,4(5):1-6(Wang Rulu.Longitudinal deformation analysis for Shanghai subway tunnel constructed by shield method[J].Underground Engineering and Tunnels,2009,4(5):1-6(in Chinese))
[10]王如路.上海软土地铁隧道变形影响因素及变形特征分析[J].地下工程与隧道,2009,1(5):1-6(Wang Rulu.Factors influencing deformation of Shanghai soft soil metro tunnel and deformation analysis[J].Underground Engineering and Tunnels,2009,4(5):1-6(in Chinese))
[11]Wang Z,Wang L Z,Li L L,et al.Failure mechanism of tunnel lining joints and bolts with uneven longitudinal ground settlement[J].Tunnelling and Underground Space Technology,2014,40:300-308
[2]张冬梅,黄宏伟,杨峻.衬砌局部渗流对软土隧道地表长期沉降的影响研究[J].岩土工程学报,2005,27(12):1430-1436(Zhang Dongmei,Huang Hongwei,Yang Jun.Influence of partial drainage of linings on long-term surface settlement over tunnels in soft soils[J].Chinese Journal of Geotechnical Engineering,2005,27(12):1430-1436(in Chinese))
[3]Mair R J.Tunnelling and geotechnics:new horizons[J].Geotechnique,2008,58(9):695-736
[4]Shin J H.A numerical study of the effect of groundwater movement on long-term tunnel behavior[J].Geotechnique,2002,52(6):391-403
[5]郑永来,李美利,王明洋,等.软土隧道渗漏对隧道及地面沉降影响研究[J].岩土工程学报,2005,27(2):243-247(Zheng Yonglai,Li Meili,Wang Mingyang,et al.Study on influence of seepage of metro tunnels in soft soil on the settlements of tunnels and ground[J].Chinese Journal of Geotechnical Engineering,2005,27(2):243-247(in Chinese))
[6]湘2015SZ102-4城市综合管廊-预制拼装工程[S].长沙:湖南科学技术出版社,2016(Hunan Province2015SZ102-4 Urban utility tunnel-Prefabricated assembly engineering[S].Changsha:Hunan Science and Technology Press,2016(in Chinese))
[7]严佳梁.盾构隧道管片接头性态研究[D].上海:同济大学,2006(Yan Jialiang.Research on the behavior of the segment joint in shield tunnel[D].Shanghai:Tongji University,2006(in Chinese))
[8]葛世平,谢东武,丁文其,等.盾构管片接头简化数值模拟方法[J].岩土工程学报,2013,35(9):1600-1605(Ge Shiping,Xie Dongwu,Ding Wenqi,et al.Simplified numerical simulation method for segment joints of shield tunnels[J].Chinese Journal of Geotechnical Engineering,2013,35(9):1600-1605(in Chinese))
[9]王如路.上海地铁盾构隧道纵向变形分析[J].地下工程与隧道,2009,4(5):1-6(Wang Rulu.Longitudinal deformation analysis for Shanghai subway tunnel constructed by shield method[J].Underground Engineering and Tunnels,2009,4(5):1-6(in Chinese))
[10]王如路.上海软土地铁隧道变形影响因素及变形特征分析[J].地下工程与隧道,2009,1(5):1-6(Wang Rulu.Factors influencing deformation of Shanghai soft soil metro tunnel and deformation analysis[J].Underground Engineering and Tunnels,2009,4(5):1-6(in Chinese))
[11]Wang Z,Wang L Z,Li L L,et al.Failure mechanism of tunnel lining joints and bolts with uneven longitudinal ground settlement[J].Tunnelling and Underground Space Technology,2014,40:300-308