某连拱隧道在中导洞施工时出现坍方。
During construction of the middle drift of a multi-arch tunnel, collapse accident occurred.
在连拱隧道施工中，中隔墙扮演着至关重要的角色。
During the construction of double-arched tunnel, the role of center pillar is of great importance.
双跨连拱隧道以设置地基梁的方式穿过大型溶槽地段。
The double-arch tunnel passes through a big water-eroded groove by setting foundation beam method.
建立破碎围岩的力学模型，求破碎围岩中连拱隧道荷载的理论解。
Their related mechanical models are established and theoretical solutions to the calculation of chain tunnel load inside broken rock mass are obtained.
离石隧道是我国第一座黄土连拱隧道，是交通部科研项目的实体工程。
Lishi tunnel is the first loess multi-arch tunnel in our country, which is a solid engineering of scientific research projects belonging to the Ministry of Communications.
从总体上分析结果可知，双侧壁导坑法更适合于双向八车道连拱隧道施工。
It can be concluded that from overall analysis the double-side-drift method is more suitable than the CRD method in multiple-arch tunnel with eight traffic lanes.
最后提出了最佳的黄土仰拱一次性开挖长度，并应用于黄土连拱隧道的施工。
According to the final results of analysis, a reasonable excavation length of inverted arch in one step was put forward and applied to the construction of multi-arch tunnel in loess.
介绍了该断面初期支护参数、由区间标准断面转换到三连拱隧道的工法及工程效果。
Primary supporting parameters, construction method transformation from the normal route tunnel to the three-connected-arch tunnel, and engineering practice effects are introduced respectively.
④对于浅埋大断面大跨度连拱隧道，应及早施作二衬，封闭成环，以改善结构受力。
The secondary support structure and the enclosing of the lining must be established in time to improve the performance of the lining.
本文就修建岵岫岭双线连拱隧道过程中开展的施工技术研究成果和应用情况做了介绍。
In this article, authors state construction technology study achievements gained in construction of the Huxiuling double lines multi-arch tunnel and their application.
大跨连拱隧道受结构和跨度的影响，其初期支护与二次衬砌各自承受不同的围岩压力。
As the large spanned arch tunnel is influenced by the structure and span, the loads on initial support and secondary lining are different.
曲中墙连拱隧道，是在对当前连拱隧道修建过程中进行总结论证基础上提出的一种新型构造形式。
At present, there is a lack of construction technology research on the curved middle wall twin-arch tunnel.
介绍和总结了近年来浙江省连拱隧道修建过程中的施工方法、防排水设计等方面的一些经验教训。
The article expounds and summarizes some experience and lesson achieved in the process of multi-arch tunnel design and construction in Zhejiang Province.
公路双线连拱隧道以其占地少、与线路连接方便等突出优势在高等级公路建设中被越来越多的采用。
The road double lines multi-arch tunnel has such advantages as low ground area, easy connection with other lines and so forth, and is adopted more and more widely in high grade road construction.
文章介绍了练江连拱短隧道在勘测设计阶段进行多方案比选研究的情况及施工过程中方案调整的情况。
This paper describes the alignment alteration of Lianjiang tunnel with continous arches in the planning phase and the solution modification during construction.
最后，对无中墙连拱隧道的施工方案进行了比选，即对交叉中隔壁工法的两种施工工序进行比较分析。
Finally, the construction plans of the double-arch tunnel without middle-wall are compared, that is, two construction process engineering methods of CRD construction method are compared.
离石隧道是我国第一座黄土连拱隧道，简要介绍了该隧道的衬砌结构、防排水处理、施工工序等的设计概况。
Lishi tunnel is the first loess multi-arch tunnel in China. The designs of the tunnel are briefly introduced, including lining structure, prevention drainage treatments and construction process.
由于黄土具有结构性、欠压密性和土结构性受损易发生湿陷等特性，再加上会路连拱隧道施工开挖工序多，结构受力复杂。
Loess has the characteristics of structural properties, such as incomplete consolidation, collapsibility; and the multi-arch tunnel of highway has complex excavation steps and structure stress.
小净距隧道是介于分离式隧道和连拱隧道之间的隧道结构形式，该结构形式比连拱隧道施工工艺更简单，且易于防水处理和造价控制。
Small clearance tunnel is a tunnel form between separated tunnel and multi-arch tunnel. It is much easier to construct, waterproof and control the cost.
研究结果表明：连拱隧道内侧断裂带、上方松散层等不良地质条件和不合理的施工方案是导致隧道衬砌严重破坏和山体地表开裂的主要原因。
The research results indicate that the top inclined fault and the loose rock strata and the unreasonable construction project are the main causes to induce these defects.
研究结果表明：连拱隧道内侧断裂带、上方松散层等不良地质条件和不合理的施工方案是导致隧道衬砌严重破坏和山体地表开裂的主要原因。
The research results indicate that the top inclined fault and the loose rock strata and the unreasonable construction project are the main causes to induce these defects.
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