在城市大型建筑中，大部分采用了地下室和局部地下室结构。在局部地下室建筑物的施工中，采用工字钢做挡土结构，利用周边承台及工程桩做锚桩，解决局部深基础土方开挖边坡稳定性效果好及场地占用小等优点，具有明显的经济效果和社会效果。 In large-scale urban buildings, most of the basement and partial basement structures are used. In the construction of local basement buildings, the use of I-beam as a retaining structure, the use of surrounding pile caps and engineering piles as anchor piles, to solve the local deep foundation earth excavation slope stability and small site occupancy advantages, etc. Obvious economic and social effects.