采用将集中受力变为分散均匀受力的方法，设计了一种薄壁轻型组合结构作为软地基上的预应力先张法合座，以克服软地基承载力低、滑移量大的缺点。另外，结构中若干道薄壁坎墙，可使薄长底座保持稳定。这种台座埋置浅、易施工、用料少。 By adopting a method of concentrating forces into uniformly distributed forces, a thin-wall lightweight composite structure is designed as a pre-stressed pre-tensioning seat on soft foundations to overcome the shortcomings of low bearing capacity and large slip of soft foundations. In addition, the structure of a number of thin walled wall, thin long base can be stabilized. This pedestal shallow, easy construction, materials used less.