【作者】 龚志红；

【导师】 李天斌；

【作者基本信息】 成都理工大学 ， 岩土工程， 2007， 硕士

【摘要】 黄草坪隧道位于Ⅸ度高烈度地震区，并且距离深大活动断裂之近(300～400m)，国内外实属罕见，成为隧道建设史上的一个典型，从而引发了对其安全性的顾虑。为了全面掌握该隧道建成后的安全状况，以便采取相应的措施，对已建的黄草坪隧道抗震安全性进行研究和评价是非常必要的。同时，研究成果也能更好的指导隧道的抗震设计和施工。本文针对目前隧道抗震安全性评价的需要，采用现场地质调查，国内外相关资料收集整理和分析，结合现场监测试验、数值模拟计算和物理模拟试验等分析方法和手段，构建了地震区隧道抗震安全性评价指标体系，运用模糊数学方法建立了综合评价模型。最后，对黄草坪隧道的抗震安全性进行了评价，获得如下认识和成果：1．详细分析了黄草坪隧道的工程地质条件，对隧址区内主要断裂活动性和特征进行了归纳，对国内外有关隧道及地下结构的震害资料进行分类、整理和研究，分析了山岭隧道的震害破坏形式和震害影响因素，为隧道抗震安全性评价指标体系的确定提供了依据。2．提出以安全系统工程的思想和方法对隧道进行安全性评价，阐述了安全系统工程以及安全评价的基本内容，介绍了多因素的模糊综合评判法用于隧道安全评价的具体评价步骤和计算方法。3．构建了山岭隧道抗震安全性评价的指标体系，包括隧道地质条件、隧道设计施工情况、地震及其动力效应和隧道结构的受力状态等四个主要方面及其下属的二级评价指标，详细分析和阐述了各指标对隧道抗震安全性的影响。4．综合运用层次分析法和模糊综合评判法，建立了隧道抗震安全的模糊综合评价模型。其中，层次分析法用于确定评价指标的权重，评价模型为二级模糊综合评价模型。5．运用建立的隧道安全性模糊综合评价模型，对黄草坪2号隧道的抗震安全性进行了计算和评价。评价结果表明，该隧道洞口段抗震安全性处于较危险等级，洞身浅埋段处于较安全状态，这与隧道所处的实际环境和地下结构震害的调查规律较吻合，验证了评价方法和评判模型的合理性。更多还原

【Abstract】 Huangcaoping tunnel lies in high earthquake intensity ofⅨdegree seismic area, it is very close to deep activity rupture zone (about 300 to 400 m), which is really rare at home and abroad, and became a representative engineering in tunnel construction history, thereby caused the apprehension to its safety.In order to grasp the safety state of Hcaoping tunnel after building up, so that take the corresponding measures, it is very essential that carry on study and evaluation of the aseismatic safety on the completed tunnel. Meanwhile, the research results can be the good guidance for the aseismatic design and construction.Aim for the need of the tunnel evaluation at present, the index system of aseismatic safety evaluation was established by using method of comprehensive research means combined by geological survey, field monitoring test, indoor physical modeling test as well as numerical simulation analysis, the comprehensive evaluation model was established by using the method of fuzzy mathematics. Finally, Huangcaoping tunnel was evaluated by using the fuzzy comprehensive evaluation modle established. Following the works, acquire the understanding and results in the below:1. Analyzing geological conditions of Huangcaoping Tunnel in detail, and summarizing the main fracture activity as well as site seismic dynamic characteristics around the location district of the tunnel. Studying and classifying the data of earthquake damages of tunnels at home and abroad, analyzing the destroy forms and the influencing factors of earthquake damages of mountain tunnels, according to all this, the index of tunnel aseismatic safety evaluation was established.2. Presented the means by using the ideas and the methods of safety system engineering to tunnel safety evaluation, expatiated the basic content of the safety system engineering and safety evaluation, introduced the analysis procedure and calculate measures of multi-factor fuzzy comprehensive evaluation.3. Established aseismatic safety evaluation index system of mountain tunnel, it contains four important aspects of geological conditions, the situation of design and construction, earthquake and it dynamic effects, and the stress state of tunnel structures. Every aspect of the four has its secondary-level factors. Analyzed and expatiated the influence of every factor on tunnel aseismatic safety in detail. 4. Established fuzzy comprehensive evaluation model of tunnel aseismatic safety by using AHP and fuzzy comprehensive evaluation method. It is secondary-level of Fuzzy comprehensive evaluation model, AHP was used for the weight calculation of evaluation factors.5. Calculated and evaluated the aseismatic safety of Huangcaoping Tunnel No.2 by using established evaluation model. The evaluation results indicated that the aseismatic safety of the opening section is in the danger state, the section of shallow-buried is in relatively safe state. The result is according with the actual environment of the tunnel, and according with the research law for the earthquake disaster of underground structures too. It validated the rationality of the evaluation method and model.更多还原