TOP-DOWN CONSTRUCTION FOR TUNNEL PORTAL WALLS IN KARSTIC LIMESTONE

机译：岩溶石灰岩隧道门壁的自上而下施工

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A critical link for the Ohio River Bridges East End Crossing project features constructionrnof twin 1,680-foot highway tunnels. Top-down construction was employed for portal cutsrnthrough soil, shale, limestone, and dolomite to access tunnel drifts. This paper discussesrnthe design-build challenges of the permanent top-down portal walls for this highwayrntunnel project advanced under a Public-Private-Partnership contract with an aggressivernmining schedule. These include innovative ground-support systems for achievingrna 75-year service life, structural shotcrete reinforcement, design for karstic voids in pinnacledrnlimestone and groundwater, soil nail wall construction techniques, requirementsrnfor architectural shotcrete, and accommodating accelerated construction schedules.

机译：俄亥俄河桥梁东端穿越项目的关键环节是建设两条1,680英尺长的高速公路隧道。自上而下的构造被用于穿过土壤，页岩，石灰石和白云岩的门户切割，以进入隧道漂流。本文讨论了根据公共-私人-合作伙伴计划以积极的开采进度推进的该公路隧道项目的永久自上而下的门户墙的设计和建造挑战。这些措施包括可实现75年使用寿命的创新地面支撑系统，结构喷射混凝土加固，品尼高石灰石和地下水中的岩溶空隙设计，土钉墙施工技术，建筑喷射混凝土要求以及可适应的加速施工进度。

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来源
《Rapid Excavation and Tunneling Conference 2015 proceedings》|2015年|618-627|共10页
会议地点 Washington DC(US)
作者
Charles A. Stone; Eric C. Wang;
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Jacobs Engineering Group, Inc.;

Jacobs Engineering Group, Inc.;

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正文语种 eng
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1. Comparison of Tunnelling Methods in Granitic and Karstic Limestone Bedrock in Kuala Lumpur [J] . Ting Wen-Hui, Ooi Teik-Aun, Aminuddin Ahmad, Felsbau . 2005,第2期

机译：吉隆坡花岗岩和岩溶石灰岩基岩中掘进方法的比较
2. Hazard connected to railway tunnel construction in karstic area: applied geomorphological and hydrogeological surveys [J] . Casagrande G., Cucchi F., Zini L. Natural Hazards and Earth System Sciences Discussions . 2005,第2期

机译：卡斯蒂区铁路隧道建设的危险：应用地貌和水文地质调查
3. Karstic problems in the construction of Milwaukees Deep Tunnels [J] . M. J. Day Environmental Geology . 2004,第6期

机译：密尔沃基深水隧道施工中的岩溶问题
4. Design Considerations for Top-Down Wall Construction in Carbonate Rock for Ohio River Bridges-East End Crossing Tunnels [C] . Eric C. Wang, Charles A. Stone, Wern-Ping Nick Chen ITA-AITES world tunnel congress . 2016

机译：俄亥俄河桥梁-东端穿越隧道碳酸盐岩自上而下的墙体施工设计注意事项
5. Building structured Web community portals: A top-down, compositional, and incremental approach. [D] . DeRose, Pedro. 2009

机译：构建结构化的Web社区门户：自顶向下，组合和增量方法。
6. Risk Evaluation Model of Highway Tunnel Portal Construction Based on BP Fuzzy Neural Network [O] . Xianghui Deng, Tian Xu, Rui Wang 2018

机译：基于BP模糊神经网络的公路隧道门户施工风险评估模型。
7. Hazard connected to railway tunnel construction in karstic area: applied geomorphological and hydrogeological surveys [O] . Casagrande G., Cucchi F., Zini L. 2005

机译：岩溶地区铁路隧道建设的危害：应用的地貌和水文地质调查
8. Construction and Difficult Geology: Karstic Limestone, Permafrost, Wetlands, and Peat Deposits [R] . Adams, F. T. , Lovell, C. W. , Ruth, B. E. , 1984

机译：建设和困难的地质：岩溶石灰岩，永久冻土，湿地和泥炭沉积物

TOP-DOWN CONSTRUCTION FOR TUNNEL PORTAL WALLS IN KARSTIC LIMESTONE

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