Most part of the North Trunk Line of WanjiaZhai Yellow River Delivery Project has to pass through the zone of collapsible loess, so the collapsibility of the loess foundation becomes the main engineering geological problem therein.

• 摘要山西省万家寨引黄工程北干线输水管线大部分地段通过黄土地区，黄土地基的湿陷性已成为主要的工程地质问题。