通过工程实例和对同一承台下长短桩各断面的轴力量测,研究我国沿海城市具有两个或多个较硬的持力层的软土地区,当上持力层变形模量大于下持力层时,长短桩桩基与长桩桩基的变形性状机理,得出在该类地基中,长短桩桩基的沉降小于长桩桩基,且工程造价更低。该研究对我国沿海地区在该类地基工程中降低基础造价、减少建筑物沉降有一定的借鉴作用。 Through engineering examples and axial force measurements on each section of long-short-piled piles under the same pile, the soft-soil areas in China’s coastal cities with two or more hard bearing layers are studied. When the upper bearing layer has a higher modulus of deformation than the lower one In the force layer, the deformation mechanism of the long-short pile foundation and the long pile pile foundation shows that in this kind of foundation, the settlement of the long-short pile foundation is less than the long pile foundation, and the construction cost is lower. The study has a certain reference for China’s coastal areas to reduce basic construction costs and reduce building settlement in such foundation projects.