正交体系下隧道与滑带相交力学模型与加固研究

发布时间：2018-04-14 12:32

本文选题：隧道 + 滑坡　；参考：《科学技术与工程》2017年09期

【摘要】：在山区修建高速铁路或公路时,为了保证线路的顺直性,选线难以对所有滑坡都进行避绕,导致隧道穿越大型滑坡的情况经常发生。在修建以及线路运营过程中,时常发生隧道拱顶开裂、隧道支护鼓胀、隧道变形严重侵限等问题。结合三个典型隧道-滑坡正交体系的具体实例,通过其施工监测变形,剖析了正交体系下隧道-滑坡在单滑面的变形特征,并分析了其受力模式。结合数值模拟和受力模式,提出了一体化加固方式,并以实例分析了其加固效果。研究结论:①在单滑面情况下,总结了滑带与隧道相互作用下的变形特征:当滑带作用于隧道边墙,其破坏类型为剪切破坏;当滑带作用于拱顶时,隧道破坏类型为挤压剪切破坏,隧道以拱部变形为主;②简化了滑带作用于隧道边墙的受力计算模型,利用数值计算验证了计算模型简化的合理性;③对滑带作用于隧道边墙的相互作用模式,提出了合理的加固方式,并通过计算表明隧道的变形得到了较好的控制。
[Abstract]:When constructing high speed railway or highway in mountainous area, in order to ensure the straightness of the line, it is difficult to avoid all the landslides, which leads to the tunnel passing through the large landslide.In the process of construction and line operation, tunnel vault cracking, bulging of tunnel support and serious tunnel deformation are often occurred.Combined with the concrete examples of three typical tunnel landslide orthogonal systems, the deformation characteristics of tunnel landslide on single slide surface under orthogonal system are analyzed through monitoring deformation in construction, and its stress mode is analyzed.Combined with numerical simulation and stress mode, an integrated reinforcement method is proposed, and its effect is analyzed with an example.It is concluded that in the case of single slip surface, the deformation characteristics of the interaction between slip zone and tunnel are summarized: when the slip zone acts on the side wall of the tunnel, the failure type is shear failure, and when the slip zone acts on the vault,The tunnel failure type is extruded shear failure, the tunnel is dominated by arch deformation to simplify the force calculation model of slip zone acting on the side wall of the tunnel, and the rationality of the simplified calculation model is verified by numerical calculation.(3) for the interaction mode of slip zone acting on the side wall of tunnel, a reasonable reinforcement method is put forward, and the calculation results show that the deformation of the tunnel is well controlled.
【作者单位】：中国铁道科学研究院研究生部;中铁西北科学研究院有限公司;兰州交通大学;
【基金】：铁道部科技研究开发计划重点课题(2010G018-C-3-1) 甘肃省交通建设科研项目(200813) 中国中铁股份公司科技开发计划(20160203)资助
【分类号】：U451

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