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本文用土体内空穴球形扩张模型和源-源影射的方法，根据土塑性力学的基本原理，推得了粘性土地基上单桩及群桩施工产生周围土体内各点位移的表达式。并用工程实例进行对比，初步探讨了群桩施工产生位移场的一些规律。
Based on the principle of soil plasticity mechanics, the spherical cavity expansions model and the source-source projection method are used in this paper to derive the expressions of displacement of each point in the surrounding soil due to the construction of single pile and group pile on the cohesive soil foundation. And compared with engineering examples, some rules of displacement field of pile group construction are discussed preliminarily.