Method for welding and laying large-diameter spiral steel pipes in different geological environments

The invention relates to the technical field of building engineering construction, in particular to a method for welding and laying large-diameter spiral steel pipes in different geological environments. The method comprises the steps of (1) trench excavation, (2) pipeline foundation and foundation construction, (3) pipeline laying and (4) pipeline protection and backfilling. By means of the method, the problems that the buried large-diameter spiral steel pipe leaks and leaks in underground water for a long time, the service life of the steel pipe is affected due to corrosion, and the manufacturing cost is too high under complex geological conditions can be solved. 本发明涉及建筑工程施工技术领域，尤其涉及一种不同地质环境大口径螺旋钢管焊接敷设方法。该方法包括(1)开挖沟槽、(2)管道地基与基础、(3)管道敷设、(4)管道保护与回填。该方法可避免埋地大口径螺旋钢管长期在地下水中出现跑冒滴漏、钢管受腐蚀影响使用寿命、复杂地质条件造价过高的难题。