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Use of Cut-and-Cover Method for Pipeline Installation in Underground Freight Transportation

机译:地下货运管道安装中的“覆盖”方法

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This paper presents selection criteria for using cut-and-cover methods for pipeline installation in a proposed Underground Freight Transportation (UFT) system from the Port of Houston to a distribution center in south of Dallas, Texas. UFT uses close-fitting vehicles carrying freight through underground pipelines and tunnels between terminals. For this project, cut-and-cover method is used in rural areas where there are fewer limitations for trench excavation and temporary soil stockpiling. Different trench cross sections are compared to follow Occupational Safety and Health Administration (OSHA) regulations. To decide which trench cross section is more applicable, a comparison is performed for different trench geometry and construction cost based on equipment used for excavation and spoil hauling. In this paper, three trench types were compared in terms of volume of excavation, constructability and cost. It can be concluded that trench Types 2 (combination trench) and 3 (bench cut) have approximately 40% and 50% higher cost than trenches Type 1 (sloped trench) respectively, but trench Type 2 is the best option as it meets the construction space requirements.
机译:本文介绍了在从休斯敦港到德克萨斯州达拉斯南部的配送中心的拟议地下货运(UFT)系统中,采用截留式方法进行管道安装的选择标准。 UFT使用紧密配合的车辆,通过地下管道和航站楼之间的隧道运送货物。对于本项目,在沟渠开挖和临时性土壤堆放限制较少的农村地区使用了“掩埋法”。比较不同的沟槽横截面以遵循职业安全与健康管理局(OSHA)法规。为了确定哪个沟槽横截面更合适,基于挖掘和弃土运输设备对不同的沟槽几何形状和建造成本进行了比较。在本文中,从开挖量,可施工性和成本方面比较了三种沟槽类型。可以得出结论,类型2的沟槽(组合沟槽)和类型3的沟槽(基准切口)分别比类型1的沟槽(倾斜沟槽)高40%和50%,但是类型2的沟槽是最佳选择,因为它可以满足施工要求空间要求。

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