1工程概况该扩建工程是一大酒店的一个附属配套工程,该工程与原工程设一连廊相连,故设计在原紧邻大酒店的旁边布置了两根直径为1.0m桩长为47.8m的钻孔灌注桩。但在实际施工中由于种种原因:(①原大酒店地下室围护支撑拆除时可能未彻底清除,遗留有钢筋混凝土梁等结构; 1 Project Overview The expansion project is an ancillary supporting project of a large hotel. The project is connected with a corridor of the original project. Therefore, two holes with a diameter of 1.0m and a pile length of 47.8m are arranged next to the original hotel. Pouring pile. However, due to various reasons in actual construction: (1) The original Grand Hotel basement support may not be completely removed in the demolition, leaving the structure of reinforced concrete beams;