基本解釋[土木建筑工程]防滲墻專業(yè)釋義土木建筑工程防滲墻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50m的深地基是該項技術在構筑地下防滲墻時難以跨越的技術難題。