岭脚隧道涌水突泥段结构受力与变形特性分析

发布时间：2018-05-23 14:24

本文选题：涌水突泥段 + 监控量测　；参考：《长安大学》2014年硕士论文

【摘要】：随着我国公路交通业的快速发展，兴建的道路越来越多，，而在山区，隧道成了很多设计者的首选，但是复杂地质条件给隧道的设计施工带来了很多困难一些隧道处于断层破碎带，岩体的承载能力低，稳定性差，加之有地下水等汇集，很容易发生涌水突泥塌方等灾害，不同程度的影响工程进度，严重的造成施工安全，不但当前工程质量不能保证，甚至对后期的运营产生造成影响因此对涌水突泥等不良地质段隧道结构受力与变形进行研究是有必要的本文以岑（溪）水（汶）高速岭脚隧道为依托，对其涌水突泥段围岩结构的受力与变形特性进行分析研究，最后结合测试值计算值与材料的设计值进行对比来评价隧道围岩以及支护结构的安全性首先，对涌水突泥段工程概况和处治措施进行介绍，对隧道结构的位移受力进行了现场测试：选取涌水突泥段典型断面埋设压力盒表面应变计混凝土应变计和钢筋计等测试元件，量测内容包括拱顶下沉周边收敛，围岩压力钢架应力锚杆应力初期支护与二次衬砌间的接触压力二次衬砌应力等通过对测试数据的分析，得出围岩支护系统的受力与变形特性，计算初期支护和二次衬砌的荷载分担比其次，利用MIDAS/GTS有限元分析软件进行三维数值模拟计算，从理论上分析初期支护结构的受力及变形，并且通过现场监控量测数据同数值模拟的计算结果进行对比分析论证最后，对隧道支护结构进行安全性评价监测及计算结果表明，岭脚隧道涌水突泥段采用的处理措施满足隧道施工要求，该区域拱顶下沉及周边收敛在合理范围内，初期支护和二次衬砌各部位受力良好，材料未破坏，整个结构安全可靠
[Abstract]:With the rapid development of highway transportation industry in China, more and more roads are being built, and in mountainous areas, tunnels have become the first choice for many designers. But the complex geological conditions bring many difficulties to the design and construction of the tunnel. Some tunnels are in the fault broken zone, the bearing capacity of the rock mass is low, the stability is poor, and there is groundwater gathering, so it is easy to happen the disasters such as water gushing, mud inrush and collapse, etc. Affecting the progress of the project to varying degrees, causing serious construction safety, not only cannot the quality of the current project be guaranteed, So it is necessary to study the stress and deformation of tunnel structure in bad geological section, such as water gushing and mud outburst. Based on Cen (Xi) water (Wen) high speed Lingqiao tunnel, this paper analyzes and studies the stress and deformation characteristics of surrounding rock structure of water gushing mud section. Finally, the safety of surrounding rock and supporting structure of tunnel is evaluated by comparing the calculated value of test value with the design value of material. First of all, the general situation and treatment measures of water gushing mud section are introduced. The displacement force of tunnel structure is tested on the spot: the pressure box surface strain gauge, concrete strain gauge and steel bar gauge are embedded in typical sections of water gushing mud section. The measuring contents include the convergence of the circumference of the dome subsidence. Contact pressure secondary lining stress between initial stress support and secondary lining of surrounding rock pressure steel frame the stress and deformation characteristics of surrounding rock support system are obtained through analysis of test data. Calculation of load-sharing ratio for primary support and secondary lining Secondly, the three-dimensional numerical simulation is carried out by using MIDAS/GTS finite element analysis software, and the stress and deformation of the initial supporting structure are analyzed theoretically, and the results of field monitoring and measurement are compared with the results of numerical simulation. Finally, the safety evaluation of tunnel support structure is carried out. The results of monitoring and calculation show that the treatment measures adopted in the water gushing and mud-bursting section of Lingjiao tunnel meet the requirements of tunnel construction, the dome subsidence and circumference converge within a reasonable range, the initial support and secondary lining are well loaded, and the materials are not destroyed. The whole structure is safe and reliable
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U452.1

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