非开挖拉管工艺在市政排水管线中的应用

APPLICATION OF NON-EXCAVATED TUBE DRAWING PROCESSES IN MUNICIPAL DRAINAGE PIPELINE

青塔项目排水施工现场天燃气、给水、电信三种管线与排水设计管线位置冲突,不宜采用明开槽施工,因此选用非开挖拉管工艺进行排水。非开挖技术通过导向、定向钻进等手段,在地表极小部分开挖的情况下,敷设、更换和修复各种地下管线,对地表干扰较小,取得了良好的施工效果。但该技术仍存在一些局限性,如在重力流排水中存在缺陷,在今后的排水工程中有待解决。

Natural gas, water supply and telecommunication pipelines on the drainage construction site of Qingta Project affect the design position of drainage pipeline and open excavation construction should not be adopted, so non-excavated tube drawing processes are adopted for drainage construction. Non-excavation technique sets, changes and repairs various underground pipelines through guiding and directional drilling methods with excavation of only a small ground area. This technique produces a little influence on ground surface and ensures favorable construction effects. However, this technique still has some limitations, such as defects in gravity flow drainage, etc., and shall be further improved in future drainage projects.