东京地表多是火山灰质粘土层,地耐力不高,但是,在基础处理上却比较简单,大开挖的基础不多。不设地下室的楼房有的基础只挖下去几十厘米,这可能与建筑的自重轻、体形细高、刚度好等原因有关。在一些开挖较深的基础中,为了保护近在咫尺的毗邻建筑,开挖前先用挖掘机的铲头将5毫米厚钢板制 The surface of Tokyo is mostly a volcanic gray clay layer, and the ground endurance is not high. However, the foundation treatment is relatively simple and the foundation for large excavation is not much. The foundations of buildings without a basement are digging down a few tens of centimeters, which may be related to the reasons such as light weight, high profile, and good rigidity. In some deep excavation foundations, in order to protect adjacent buildings in close proximity, excavator shovel heads are used to make 5 mm thick steel plates before excavation.