沉积岩地区不同桩径桩长的桩基承载力分析

Analysis on Bearing Capacity of Pile Foundation with Different Diameter and Length in Sedimentary Rock Areas

计算分析中采用了同一地质岩层条件,分别得到不同桩基直径及桩长的极限承载力,其中包括了摩擦桩和嵌岩桩,同时也考虑了在摩擦桩情况下的大直径桩尺寸效应。分析结果表明,嵌岩桩单桩极限承载力显著高于摩擦桩;嵌岩桩可不考虑大直径桩基的尺寸效应,但摩擦桩不可忽视该影响,增加桩基直径对摩擦桩极限承载力的提高会打折扣。

The same geological and rock formation conditions are used in the calculation and analysis, and the ultimate bearing capacity of different pile diameters and pile lengths are obtained respectively, including friction piles and rock-socketed piles, and the size effect of large-diameter piles in the case of friction piles is also considered. The analysis results show that the ultimate bearing capacity of the rock-socketed pile is significantly higher than that of the friction pile;the size effect of the large-diameter pile foundation may not be considered for the rock-socketed pile, but the effect cannot be ignored for the friction pile. Increasing the pile diameter will reduce the improvement of the ultimate bearing capacity of friction piles.