直接铺管施工技术研究——以陕京四线无定河穿越工程为例

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

直接铺管施工技术具有设备施工占地少,施工周期短的特点,可以一次性完成大口径管道施工,能适应较复杂地质情况,施工可靠性较高.以陕京四线无定河穿越工程为例,介绍了直接铺管施工技术在工程中的应用,克服了穿越管道42m大落差、富含水松散细砂地层、-20℃低温条件下施工等诸多困难.

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 pipe-line could be completed in one time and it was suitable for complex geological conditions and re-liable 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℃.