【摘要】 为了研究内河港口大直径嵌岩灌注桩在其荷载作用下的工作特性,结合重庆寸滩港三期工程中嵌岩桩布置特点,选取S1#、S2#桩进行原形试验,通过等效曲线转换对试验桩的受力机理及桩端阻力、桩侧土层和岩层摩阻力发挥过程进行分析;同时也利用室内模型试验进行受力机理研究。试验结果表明:桩侧土层摩阻力呈线性变化,桩土相对位移达8 mm时即能充分发挥作用;桩侧岩层摩阻力呈非线性,其最大值位置跟嵌岩部分岩层性质有很大关系,但一般处于岩层强度高且靠近桩端的位置。更多还原

【Abstract】 To research the work characteristics of the large-diameter rock-socketed cast-in-place pile under the load at river port and considering the layout features of the Cuntan phase Ⅲ project in Chongqing,we select the S1#and S2#to carry out in-situ pile tests, and analyze the mechanical mechanism, generation process of skin frictions and tip resistance of piles by the equivalent curve. Meanwhile,the indoor model test is made to study the stress mechanism. The test results show that skin frictions vary linearly,which will be produced when the pile-soil displacement reaches 8 mm,and frictions from rock vary nonlinearly,in which the maximum value is related to the characters of rocks,and generally locates at the place with high rock strength and near the pile tip.更多还原