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后压浆钻孔灌注桩可以大大改善桩体的受力性能,提高单桩承载力,是对传统工法的一项重大突破。在桩基设计中,单桩竖向承载力的确定影响到整个设计方案的科学性及合理性,决定着方案实施的成败。某后压浆钻孔灌注桩试验工程采用单桩竖向静载荷试验和高应变动测技术进行单桩承载力测试,通过对动静试验数据进行对比分析发现,两种试验方法测得的总阻力基本一致,而桩侧摩阻力及端阻力的试验结果稍有偏差,对存在的差异进行了合理的分析,从而可以更准确地确定单桩承载力,大大提高了试验的精度。
Post-grouting bored piles can greatly improve the performance of the pile and improve the bearing capacity of the pile, which is a major breakthrough in the traditional method. In the design of pile foundation, the determination of the vertical bearing capacity of single pile affects the scientificity and rationality of the whole design scheme and determines the success or failure of the scheme implementation. After a post-mortar grouting pile test project using single pile vertical static load test and high-strain dynamic testing technology for single pile bearing capacity test, through the static and dynamic test data comparison analysis found that the total resistance measured by the two test methods The results of pile friction and end resistance are slightly deviated, and the differences are analyzed reasonably, so that the bearing capacity of single pile can be more accurately determined and the precision of the test is greatly improved.