上海宝钢第三期工程1450毫米板坯连铸水处理区铁皮坑,直径为17.8米,深20.1米,采用地下连续墙护壁(图1)。连续墙的厚度为800毫米,高35.5米。地下连续墙槽段采用柔性接口,具体做法如图2所示。为了保证铁皮坑升挖时连续墙不出现 The pit of the 1450 mm slab continuous casting water treatment zone of Shanghai Baosteel’s third phase project is 17.8 meters in diameter and 20.1 meters deep, and it is protected by a continuous wall of underground walls (Figure 1). The continuous wall has a thickness of 800 mm and a height of 35.5 meters. The underground continuous wall slot section uses a flexible interface. The specific practice is shown in Figure 2. To ensure that the continuous wall does not appear when the pit is raised