金利华    （华东勘测设计研究院 杭州 310014）

[提要]  在现行地基基础规范的基础上，进行了超常规的设计尝试。根据工程地质特点，为充分利用不同深度的地基土承载力，在基础底下合理布置刚性长桩及柔性短桩，使桩分别落在不同的土层上，并满足复合地基承载力和变形要求，从而使桩身强度得到最大限度的利用，取得了很好的经济效益。通过实际工程设计表明，在一定地质条件下，刚柔性联合桩的应用不失为一种节约投资、行之有效的方法。可根据工程和地质特点，推广应用到其它桩型上。
[关键词]  基础处理  刚柔性联合桩  设计

In order to take full use of the space loading capacity of foundation soil, heighten the loading capacity of compound foundation soil and save the foundation treatment cost, the author has tried on a transnormal design on the existing foundation standards according to engineering characteristics. The rigid long piles and flexible short piles are reasonable arranged in the foundation. Thus the piles will be located at different soil layer,which meet requirements of compound foundation loading capacity and deformation. This design shows that the mix pile in certain geologic conditions is an effective method to save cost and can be widely used in other kind of piles according to engineering characteristics.
Keywords: foundation treatment; design; rigid-flexible pile; long-short-pile composite foundation