For an excavation project, the existence of adjacent composite foundations influences the earth pressure on the retaining wall, which will have a significant implication for the design and construction of the excavation project. In this paper, a simplified method is proposed to assess the influence of an adjacent single pile composite foundation in the calculation of earth pressures on a retaining wall, in which the pile-soil interaction within the composite foundation is considered. Comparison was made between the proposed method and the existing methods where the pile-soil interaction is ignored, which shows that the existing methods can overestimate or underestimate the earth pressure to a large extent. For the excavation project considered in this research, when the pile-excavation distance exceeds seven times the pile diameter, the influence of the composite foundation can be reasonably ignored.

对于开挖工程来说，相邻复合地基的存在会影响挡土墙的土压力，这对开挖工程的设计和施工具有重要的意义。本文提出了一种简化的方法来评估挡土墙土压力计算中相邻单桩复合地基的影响，其中考虑了复合地基内的桩-土相互作用。将所提出的方法与忽略桩土相互作用的现有方法进行比较，结果表明现有方法会在很大程度上高估或低估土压力。对于本研究考虑的开挖工程，当桩-开挖距离超过桩径的7倍时，