昔格达岩层中灌注桩承载力试验分析和计算

Testing Study on Bearing Capacity of Cast-in-situ Pile in Xigeda-terrain

昔格达岩层的工程性质极为特殊,位于该岩层中的灌注桩的承载特性有着自身的特点,根据攀枝花地区新九试验工地的灌注桩轴向静载荷试验资料,分析了昔格达岩层中灌注桩轴向力、侧摩阻和端阻力的分布和发挥规律,得出昔格达岩层中灌注桩的承载性状,并结合以往该岩层中灌注桩的静载荷试验资料和本次试验,对现行规范中的计算公式进行修正,提出灌注桩轴向承载力的经验计算公式,为在该地层中灌注桩的设计和施工提供依据。

The engineering properties of the Xigeda-terrain are extremely special. The bearing properties of cast - in situ pile in this kind of terrain have their traits. On the grounds of vertical static test data, it analyses the working hales of axial pressure, side friction and tip resistance of cast-in-situ pile and summarizes the bearing properties of cast-in-situ pile in Xigeda-terrain. Furthermore, combining the previous vertical static tests data and this test result, the authors put forward a calculating formula for the axial bearing capacity of cast - in - situ pile, which will provide the reference for the design and construction of cast-in-situ pile in this kind of terrain.