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首页> 外文会议>UMN annual geotechnical engineering conference >Geotechnical Construction on the Central Corridor Light Rail Transit (CCLRT) Project, Minneapolis-St. Paul, Minnesota
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Geotechnical Construction on the Central Corridor Light Rail Transit (CCLRT) Project, Minneapolis-St. Paul, Minnesota

机译：明尼阿波利斯街中央走廊轻轨交通（CCLRT）项目的岩土工程施工。明尼苏达州的保罗

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摘要

The Central Corridor Light Rail Transit (CCLRT) Project (a.k.a. Metro Green Line) has been constructed along 11 miles of right-of-way between the Union Depot Station in downtown St. Paul and the multimodal station (The Interchange) at the west end of downtown Minneapolis. Construction of the rail line began in 2010; trains are scheduled to begin running on the Green Line in 2014. Construction of the CCLRT Project required extensive utility relocation, grade separation, and bridge retrofitting to accommodate the double track rail line. To allow construction of a project of this magnitude in an urban setting such as this, several earth retention systems, both permanent and temporary, were required along the corridor. This paper presents a summary of a few select earth retention systems used during construction of various portions of the CCLRT Project. The types of earth retention systems used on this project included permanent anchored soldier pile and lagging walls, permanent soil nail walls, and temporary internally braced, anchored, and cantilevered soldier pile and lagging walls. Geotechnical construction was complicated by the presence of abundant underground utilities, overhead obstructions, vibration sensitive buildings, historic structures, and the need to maintain vehicle and pedestrian traffic adjacent to the work areas. To further complicate construction, the geology along the corridor varies significantly, including shallow limestone and sandstone bedrock, alluvial sand and gravel, dense / very stiff glacial till, and relatively thick deposits of urban fill, soft clay, and organic soils. In some areas, such as downtown St. Paul, the geology varies rapidly over relatively short distances requiring multiple different earth retention systems.
机译：中央走廊轻轨交通（CCLRT）项目（又称地铁绿线）是沿着圣保罗市中心的联合仓库站与西端的多式联运站（交汇处）之间的11英里的路程建造的明尼阿波利斯市中心。铁路线的建设始于2010年。火车计划于2014年开始在绿线上运行。CCLRT项目的建设要求广泛的公用事业搬迁，坡度分离和桥梁翻新，以适应双轨铁路线。为了在这样的城市环境中建设如此规模的项目，沿走廊需要几个永久性和临时性的挡土系统。本文总结了在CCLRT项目各个部分的施工过程中使用的一些精选的土石保持系统。该项目使用的土石保持系统的类型包括永久性的锚固士兵桩和防护墙，永久性的土钉墙以及临时的内部支撑，锚固和悬臂式士兵土桩和防护墙。由于存在大量地下公用设施，高架障碍物，对振动敏感的建筑物，历史建筑以及需要在工作区域附近保持车辆和行人通行的情况，岩土工程施工变得复杂。进一步使施工复杂化的是，沿走廊的地质情况发生了巨大变化，包括浅层石灰岩和砂岩基岩，冲积砂和砾石，致密/非常坚硬的冰川土层以及相对较厚的城市填充物，软土和有机土壤。在某些地区，例如圣保罗市中心，在相对较短的距离内，地质情况发生了迅速变化，需要多种不同的地球固位系统。

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