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1 前言钻孔灌注桩滞后压浆是提高灌注桩设计承载力的一种方法,是属于事后补强的一种方法,就是将按一定配合比配制的水泥浆用压浆泵通过成桩前预埋的压浆管压入桩侧或桩端,通过转换、扩渗、挤密、胶结等作用,使钻孔灌注桩承载力得以提高的一种方法。桩侧压浆是在桩周与桩周之间的某一深度内压浆,桩端压浆是在桩底部压浆。该技术虽已在工程中推广应用,但至今尚无成熟的施工模式。
1 Introduction Bored piles lagging grouting is to improve the design capacity of bored pile method is a post-reinforcement method is to press a certain mix of grout slurry pump with a pre-pile through the pre- Buried grouting pipe pressed into the pile side or pile end, through the conversion, expansion, compaction, cementation, etc., so that the bearing capacity of bored piles can be improved. Side pile grouting is grouted within a certain depth between the pile circumference and the pile circumference, grouting at the pile bottom. Although the technology has been popularized and applied in engineering, there is no mature construction mode so far.