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Fiberglass Pipe Market for Trenchless Applications

机译：无沟槽应用的玻璃纤维管市场

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The first trenchless installation with a fiberglass pipe that I can point to in the United States was a project for the City of Houston in 1986 and 1987 .The project was constructed using both direct bury and jacking installations. The purpose of the new line was to improve treatment efficiency by diverting a 10.2 MGD flow from the separate treatment facilities of four recently annexed Alief area MUDs to the City of Houston's Beltway Treatment Plant. The consulting engineer, Gerry E. Pate Consulting Engineers, considered corrosion resistance of upmost importance and specified only PVC lined concrete and fiberglass pipes. The general contractor Jalco Construction Co., of Houston, selected fiberglass pipes, imported from Europe, based on a lower installed cost despite a slightly higher purchase price. Jalco based the cost-savings on the fact that fiberglass was less expensive to handle and join because it is lightweight and available in 20-ft sections. The installer also noted that the smooth exterior of the fiberglass pipes reduces friction in the soil which reduces loads. The longest bore distance of 560 ft of 60-in. diameter was easily completed with loads of up to 150 tons. So much has changed since this first installation.
机译：我可以在美国提到的第一个无玻璃纤维管道非开挖安装项目是1986年和1987年的休斯敦市项目，该项目同时采用直接埋入和顶进安装。新生产线的目的是通过将10.2 MGD流量从四个最近并入的Alief地区MUD的单独处理设施中转移到休斯顿市的Beltway处理厂，以提高处理效率。咨询工程师Gerry E. Pate咨询工程师认为耐蚀性是最重要的，因此仅指定了PVC衬里混凝土和玻璃纤维管。休斯顿的总承包商Jalco Construction Co.选择了从欧洲进口的玻璃纤维管，尽管购买价格略高，但安装成本较低。 Jalco之所以能够节省成本，是因为玻璃纤维重量轻且可在20英尺的区域中使用，因此其处理和连接的成本较低。安装人员还注意到，玻璃纤维管的光滑外部减少了土壤中的摩擦，从而减少了负荷。最长孔距为60英寸（560英尺）。直径高达150吨的负载很容易完成。自首次安装以来，已经发生了很大的变化。

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