As the deep trench is being excavated by means of a special grab operated by an electric-powered winch, the mud is poured in. In this way, the excavation is stabilized and held open until the diaphragm walling has been placed in position in the trench.

• 电动卷扬机控制的专用抓斗挖掘机挖掘地槽时,将泥浆注入,槽壁土方由此固定,槽口保持敞开,确保地槽中连续墙施工就位完毕。