Technology for Direct Pipeline Laying Construction——By Taking 4-Line Wudinghe Crossing Project of Shaanxi-Beijing Pipeline Project for Example

Abstract

The construction technology of direct pipe laying had the characteristics of less land occupation of equipment in construction and short construction period, the construction of large-caliber pipeline could be completed in one time and it was suitable for complex geological conditions and reliable in construction. By taking Shaanxi-Beijing Four-line Wudinghe Crossing Project for example, the application of direct pipe laying technology in pipeline project was introduced. It is used to overcome the difficulties in the construction of pipeline crossing under the conditions of 42 m large drop, rich-water and loose fine sand formation at low temperature of −20˚C.