【作者】 苏在林；

【导师】 黄醒春； 岳祖润；

【作者基本信息】 上海交通大学 ， 建筑与土木工程， 2005， 硕士

【摘要】 针对雁门关隧道复杂地质条件以及工期要求紧的实际情况,采用地层-结构模式,应用同济曙光软件就不同开挖方法对隧道围岩稳定性的影响进行了模拟分析。通过拱顶下沉、周边收敛以及塑性区的范围来评价围岩的稳定性,验证了雁门关隧道快速施工的可行性,所得结果可为后续工程提供一定的参考。对于地质条件比较差的围岩而言,由于其自稳能力非常差,故开挖过程会对周围岩体产生不利影响,为了保证隧道围岩的稳定性,开挖前需要对洞室周边围岩进行加固。通过技术、经济的综合比较,根据不同的围岩雁门关隧道分别采用大管棚、小导管和系统锚杆支护对围岩进行了加固,效果良好。采用“穿行式液压大模板整体式衬砌台车、泵送混凝土施工,分节间隔跳仓灌注”的快速衬砌施工技术,提高了工效,确保了混凝土的灌注质量,为工程创优打下了坚实的基础。对三维非接触围岩净空位移量测技术进行了详细的分析研究,并在雁门关隧道位移量测中应用,结果证明全站仪系统精度高,能够满足隧道量测要求。通过建立隧道围岩理论模型以及对施工过程进行数值模拟,揭示施工工况对围岩稳定性的影响,对施工作业和工序安排、确保工程质量有指导作用。更多还原

【Abstract】 Based on the characteristics of geological condition and construction period of Yanmenguan tunnel, this paper analyzes the influence rules of tunnel construction on surrounding rock stability using finite element program—Tongjishuguang by individual body model. The stability of surrounding rock can be valued by vault settlement, horizontal displacement and range of plastic zone, the results not only can provide the feasibility of quick construction in Yanmenguan tunnel, but also can act as theoretic basis and reference for the design and construction of similar projects later.The bad stability or non-stability of worse geological condition rock will bring disadvantage to rock around tunnel. Reinforcing measures to rock must be taken in order to make construction gauge of tunnel reach the applying requirement during construction. According to analyze different operating plans by technology and economy, large pipes, small ducts and systematic bolts are used to reinforced soft ground in Yanmenguan tunnel, which is high praised by engineers. The technologies of telescopic hydraulic form work and pumped concrete construction and interval grouting are used during quick lining construction, which can improve the efficiency and can ensure the quality of grouting concrete.The technology of 3 dimensional non-contact displacement measuring is analyzed and studied in detail, and put into use in Yanmenguan tunnel. A lot of significant results are gained, which can provide that the precision of total station instrument is very high and can satisfied with the requirement of displacement measuring.The establishment of the theoretic model of surrounding rock and the numerical simulation of construction can discover the rules of the surrounding rock stability and concrete values, which can provide a guidance to the construction work and arrangement and the ensurence of the project quality.更多还原