stub cutoff wall

But the deep foundation in excess of 50m is a technically difficult problem in constructing the underground stub cutoff wall. In recent years it has been improved on equipment,techniques and materials,and breakthrough progress has been made.
超過(guò)50m的深地基是該項(xiàng)技術(shù)在搆築地下防滲牆時(shí)難以跨越的技術(shù)難題。