岩溶区灌浆处理桩端缺陷及其质量判定方法研究

Based on the karst grouting treatment pile-end defects and quality decision method study

结合岩溶地质某高层建筑冲孔灌注桩工程实例,提出联合运用声波透射法、低应变法和钻芯法对基桩进行快速检测,并对桩端持力层强度不足的缺陷提出高压冲洗灌浆法及其配套判定处理后基桩质量的检测方法。对冲孔灌注桩桩端缺陷处理后采用声波透射法检测方便快捷,经济效益显著,适合工程需要,远远优于静载试验方法。

Combined with karst geological high-rise building bored pile engineering examples,proposed joint use of crosshole sonic logging, low strain integrity and core drilling method for rapid detection of engineering piles, and the pile-end bearing stratum strength deficiency proposed high pressure washing grouting method and related decision treated group pile quality test methods.Bored pile end defect treatment using crosshole sonic logging was convenient, economic benefits was remarkable, suitable for the needs of the project,was far superior to the static load test method.