Variable-rigidity cemented soil core-inserting composite pile and design method

The invention discloses a variable-rigidity cemented soil core-inserting composite pile and a design method. The variable-rigidity cemented soil core-inserting composite pile comprises a peripheral cemented soil pile, a strong core pile section, a concrete prefabricated core pile section, a connecting disc, a quick-connection clamping groove and a quick-connection clamping protrusion. The concreteprefabricated core pile section and the strong core pile section are arranged in the peripheral cemented soil pile, a connecting disc is arranged at the bottom of the strong core pile section, a clamping protrusion is arranged on the connecting disc, and a clamping groove is formed in the top of the concrete prefabricated core pile section. The two sides of the clamping protrusion and the clamping groove are clamped through a springback device, and rapid connection and clamping of the two sections of core piles can be achieved. 本发明公开了一种变刚度水泥土插芯组合桩及设计方法，包括外围水泥土桩、强芯桩段、混凝土预制芯桩段、连接盘、快接卡紧凹槽和快接卡紧凸起；混凝土预制芯桩段和强芯桩段设置在外围水泥土桩内，