It is difficult to use pre-stress anchor technique to the deep excavation pit on the coast, in which the stra-tum is highly filled with water and subjected to the penetration of sea water, therefore there is no suc-cessful experience.

• 濒临海边的深基坑，地层含水量高，渗透性大，易受海水渗透影响，在这类基坑中应用预应力锚杆技术困难极大，鲜有成功的工程经验。