开拓应用HDD下水道更换市场

Horizontal Directional Drilling Used for Sewer Replacement

面对巨大的管道修复市场，市场占有率呈下滑趋势的HDD技术应开发新技术，拓展其应用领域，应用HDD进行下水道更换是一个突破点。本文重点在于论述HDD更换管道施工过程及其怎样成功和经济地应用在管线更换工程。本文也探讨了应用HDD进行有坡度下水道管线铺设和更换，以及应用HDD更换管线的优势。

Facing the measureless pipelines replacement market, HDD should be exploit new technology and develop application field with the occupation falling. Using HDD to replace sewer is a breakthrough point. The emphases of this paper is the process of HDD for line replacement and how it can be used for line replacement. Using HDD for on-grade pipelines installation and replacement and benefits of HDD are also studied in this paper.