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Details of Field Testing of Major Trenchless Technology Methods for Road Crossings

机译：道路交叉路口主要桥板技术方法的现场测试细节

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Ground displacements and borehole stability are always of prime concern during trenchless technology installations under pavements, and in close proximity to existing buried utilities and structures. Stable boreholes also relate to successful completion of the projects. The Missouri Department of Transportation (MoDOT), University of Missouri - Columbia, Michigan State University, and several industry participants have joined forces to conduct a research program to evaluate borehole stability. The objective of this research is to study the ground movements caused by pipe jacking, pipe ramming, guided boring (also known as pilot tube microtunneling), and horizontal directional drilling methods. The soil displacement in the vicinity of the cutterhead, reamer and at the ground surface will be examined. To conduct the research, several field installations were conducted at the University of Missouri's Capsule Pipeline Research Center during the summer of 2002. In addition, an actual road crossing with pipe jacking method was closely monitored. The results of these unique field evaluations were incorporated in the MoDOT specifications and guidelines and a summary will be presented in this paper. The results of this research show that, when properly used, trenchless construction methods can be cost saving options capable of installing utility and pipelines under roads and highways with minimum soil and ground movements.
机译：地面位移和钻孔稳定性始终是在路面下的挖沟技术安装过程中的主要关注，并且靠近现有的埋地公用事业和结构。稳定的钻孔也涉及成功完成项目。密苏里州立大学密苏里大学的密苏里州交通处（Modot）和几名行业参与者加入了开展研究计划以评估钻孔稳定的力量。本研究的目的是研究由管道顶板，管道夯，引导镗孔（也称为导频管Microtunneling）和水平定向钻孔方法引起的地面运动。将检查切割口，铰刀和地面附近的土壤位移。为了进行研究，在2002年夏季密苏里州的胶囊管道研究中心进行了几种现场设施。此外，密切监测与管道上的实际道路交叉。这些独特的现场评估的结果纳入了模式规范和准则中，并在本文中提出了摘要。该研究的结果表明，在适当使用的情况下，开挖施工方法可以是节省成本的选择，能够在道路和高速公路下安装公用事业和管道，具有最低土壤和地面运动。

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