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近年来我国的高层建筑迅猛发展,对地基承载力的要求越来越高,其基础形式一般采用灌注桩基础。为了满足设计要求,灌注桩的持力层要求是较为完整的岩石层,桩长和桩径尺寸往往很大,使得地下部分的造价在整个工程总造价中占较大的比例:同时,由于桩长很长,也给施工造成很大的困难。本文笔者经过多年的探索和实践,总结了一套灌注桩后压浆法桩端地基加固的施工技术可供类似工程参考。
In recent years, the rapid development of China's high-rise buildings, the bearing capacity requirements of the foundation is getting higher and higher, the basic form of the general use of piles foundation. In order to meet the design requirements, the bearing layer of bored pile requires a more complete rock layer, the pile length and pile diameter are often large, making the cost of the underground part account for a large proportion of the total project cost: at the same time, Long and long, but also to construction caused great difficulties. After years of exploration and practice, the author summarizes a set of post-grouting pile grouting method of reinforcement of the foundation for the construction of similar projects for reference.