论文部分内容阅读
碎石桩沿桩身围裹一圈土工格栅后成为筋箍碎石桩,其受力机理变得更加复杂,筋材特性必定会对桩体承载力产生影响。基于圆孔扩张理论,合理假设单桩有效加固范围边缘土压力为静止土压力,获得了可考虑筋箍与桩、土协调变形的筋箍碎石桩复合地基极限承载力计算方法,并结合工程实例与现有研究成果对该计算方法进行对比验证,结果表明该方法与实际工程吻合性更高,最后,在该方法的基础上,分析了各参数对筋箍碎石桩复合地基承载力的影响,分析结果表明:筋箍碎石桩的最优加筋深度不是一个定值,而是随着筋材性能和桩周土体条件的变化而变化。
The gravel pile becomes a tendon-gravel pile after encircling a circle of geogrids along the pile body. The stress mechanism becomes more complicated, and the characteristics of the tendon will definitely affect the bearing capacity of the pile. Based on the theory of circular hole expansion, it is reasonable to assume that the earth pressure at the edge of the effective reinforcement area of the single pile is the static earth pressure. The calculation method of the ultimate bearing capacity of the composite foundation of the rockbolt and stone piles considering the coordination of tendons, piles and soil is obtained. The results show that the method is more in agreement with the actual project. Finally, based on the method, the influence of various parameters on the bearing capacity of the composite foundation of the rockfill pile The results show that the optimal reinforcement depth of the reinforced concrete pile is not a fixed value, but changes with the performance of the reinforcement and the soil conditions around the pile.