div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: Section A-A Downward excavation Downward excavation src=https:reader030vdocumentssitereader030viewer202201270161a4277f4f76e54bc92b19dehtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv