In desert area of Jing-Yu Gas Pipeline of Second Shan-Jing Pipeline Project, soil layers belong tofine silty sand and have very low bearing capacity.

• 陕京二线靖榆输气管道工程沙漠地段,由于土壤层为细粉砂,承载力极低,给挖沟及管道下沟施工带来困难,采用双侧沉管施工方法,解决了这一难题。