论文部分内容阅读
针对嵌岩桩只适用于完整和较完整岩体,且往往被视为端承桩的情况,以贵州两个工程项目的软质较破白云岩嵌岩桩为研究对象,其持力层岩体均较破碎,通过锚桩横梁反力装置桩基静载荷试验,分析软质较破碎岩嵌岩桩竖向承载力,探讨此类地质条件下嵌岩桩承载特性。研究结果表明,该区软质较破碎白云岩嵌岩桩桩顶荷载-位移曲线主要呈缓变型,沉降由桩身压缩控制,嵌岩段桩侧摩阻力发挥较好,荷载分担比例在30%~50%之间。根据经验参数计算及实测对比研究,得出实测嵌岩桩竖向承载力比计算值高出数倍。
In view of the fact that the rock-socketed pile is only suitable for the intact and more intact rock mass and is often regarded as the end-bearing pile, taking the soft overbreaked dolomite embedded piles in two projects of Guizhou as the research object, The body is fragmented, and the vertical bearing capacity of the rock-socketed pile is analyzed by means of the static load test of pile foundation of the anti-pounding beam device. The bearing capacity of rock-socketed pile under such geological conditions is discussed. The results show that the load-displacement curve of rockfill pile with soft and broken dolomite in this area is mainly of a slowly changing type, the settlement is controlled by the compression of the pile body, and the lateral frictional resistance of the rock-socketed section plays a better role. The load-sharing ratio is 30% ~ 50%. According to the calculation of empirical parameters and comparison of measured results, it is concluded that the measured bearing capacity of rock-socketed pile is several times higher than the calculated value.