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桩土的支承刚度通常存在数量级上的差异,因此实现桩土共同作用的关键是保证桩土的变形协调,对于摩擦桩可通过“塑性支承桩”的概念来实现,对于端承桩则需通过专门的变形调节装置来实现。对该装置进行了研究,研制成功的变形调节装置具有根据荷载自动调节自身变形的特点,并且支承刚度和变形调节范围均可事先人为设定。工程实践表明,研制的变形调节装置成功实现了端承桩的桩土共同作用,取得了显著的经济效益,该研究是正确、合理的,其工程实践也是成功的。
The bearing stiffness of pile-soil usually varies by an order of magnitude. Therefore, the key to achieve the mutual action of pile-soil is to ensure the coordination of pile-soil deformation. For the friction pile, the concept of “plastic support pile” Need through a special deformation control device to achieve. The device was studied, developed a successful deformation control device has its own characteristics according to the load to adjust their own deformation, and support the stiffness and deformation adjustment range can be set in advance. The engineering practice shows that the deformation control device developed successfully realized the mutual action of pile-soil of the end-bearing pile and achieved remarkable economic benefits. The research is correct and reasonable, and the engineering practice is also successful.