【摘要】 随着高层建筑和大型桥梁的兴建,钻孔灌注桩在工程中已得到了极为广泛的应用。但是,钻孔灌注桩的固有缺陷,例如孔底沉渣、孔壁泥浆、端阻力、侧阻力发挥不同步等,限制了其承载力的发挥并且沉降较大。由此,钻孔灌注桩压力注浆技术应运而生,并被逐渐应用于工程实践中。所以,对桩的后压浆施工工艺、受力机理等技术问题进行研究是非常重要的。在国内外现有的理论研究和工程应用基础上,通过对苏通大桥Ⅱ期的试桩工程施工,详细阐述了桩端后压浆技术的具体应用。同时,利用钻孔取心及CT检测技术分析后压浆的施工效果。更多还原

【Abstract】 The bored piling technology was widely used in the construction of high buildings and bridges.The original limitations of the bored piles like bottom sediments,slurry on the hole wall,and non-synchronized exertion of end and side resistances restricted its play of bearing capacity.So,the bored pile pressure grouting technology was evolved and put into practice,and the studies on the post grouting technique and force mechanism became very important.On the bases of the available theories and engineering applications both home and abroad,the second phase trial pile construction of Sutong Yangtze River Bridge,the authors depicted the detailed application of post grouting technology,hole coring usage and CT detection technology.更多还原