本演示记录了俄亥俄河一条输水干管的施工过程。这个项目是 在使用水平定向钻安装管道方面具有历史意义，因为它提供了 州际饮用水销售。该项目面临的最大技术挑战是安装 河对岸一条36英寸长的干管。水平定向钻进是一种非开挖施工技术 随着在供水行业中的使用越来越多。这个项目演示了 长距离安装大直径管道的技术。路线选择不仅要考虑最终的管道定线，还要考虑分段 焊接管道以准备将管柱拉入钻孔的区域。 在十字路口 位置，这条河有1800英尺宽。整个钻孔长度接近3000英尺。终点位置是 选择该选项以允许角孔向下和从交叉高程返回，并提供设置 河流两侧用于钻井设备和钻井泥浆处理系统的区域。这个 穿过桥梁下方的路线，需要精确控制钻削头才能穿过桩之间 这座桥的支架。 照片显示了管道分段和钻井作业。行动中遇到的挑战 并对定向钻井在水工业中的应用进行了讨论 假如包括数字。

This presentation chronicles the construction of a water main crossing of the Ohio River. The project is historic in the use of horizontal directional drilling to install the pipe in that it provides for the interstate sale of drinking water. The greatest technological challenge to the project was the installation of a 36-inch main across the river. Horizontal directional drilling is a trenchless construction technology with increasing use in the water supply industry. This project demonstrates the application of the technology for installing large diameter pipes over long distances. Route selection involved not only consideration of the final pipeline alignment but also the staging area where the pipe was to be welded to prepare the string to be pulled into the bore. At the crossing location, the river is 1,800 feet wide. The total bore length was nearly 3,000 feet. The end locations were selected to permit the angular bores down to and back up from the crossing elevation and to provide setup areas on either side of the river for the drilling equipment and the drilling mud handling systems. The route crossed beneath a bridge and required precise steering of the drilling head to pass between the pile supports for the bridge. Photographs show the pipe staging and drilling operations. Challenges encountered during the operation are discussed, and observations on the application of directional drilling in the water industry are provided. Includes figures.