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根据高应变法在大直径灌注桩上单桩承载力的检测结果,将实测曲线分为三种类别,采用静载试验分别对不同类别的桩进行承载力验证。三组对比结果表明,高应变法的检测结果中最佳波形拟合法检测精度相对高一些,对于嵌入基岩的灌注桩,高应变法可以达到甚至超过静载试验的检测效果,对于静载试验的Q-s曲线具有缓变型特征的大直径灌注桩,高应变法检测结果存在一定误差,但在有充分的动静试验对比资料的条件下,合理地调整拟合参数,可以作为大直径灌注桩承载力验收时静载试验的补充。
According to the testing results of single pile bearing capacity on large diameter bored pile with high strain method, the measured curves are divided into three categories. The static load test is used to verify the bearing capacity of different types of pile. The comparison results of the three groups show that the accuracy of the best waveform fitting method in the test results of high strain method is relatively high. For the bored pile embedded in bedrock, the high strain method can meet or even surpass the static load test results. For the static load test The Qs curve has the characteristics of slow-changing large-diameter cast-in-situ piles. There is some error in the test results of the high strain method. However, under the conditions of sufficient dynamic and static test data, the fitting parameters can be reasonably adjusted and can be used as the bearing capacity of large diameter cast- Acceptance static load test supplement.