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路桥过渡段的不均匀沉降是引起桥头跳车的主要原因之一,利用压力灌浆技术对其进行处理是一种行之有效的方法。压力灌浆的关键是灌浆参数的选取,由于灌浆试验组数有限,所获取的灌浆参数一般只能视为一个小子样;这种情况下,如果不排除这些数据中的异常值,必然影响灌浆参数的可靠性,使用不当可能导致测试数据的判断失真。为此,文章运用Grubbs方法剔除样本中的异常数据,探讨了Grubbs方法在灌浆设计参数控制应用中存在的几个关键技术问题。
Uneven settlement of road-bridge transition is one of the main causes of bridgehead jumping. Using pressure grouting technology to treat it is an effective method. The key of pressure grouting is the selection of grouting parameters. Because of the limited number of grouting tests, the grouting parameters obtained are generally only considered as a small sample. In this case, if the abnormal values in these data are not excluded, the grouting parameters The reliability, improper use may lead to the distortion of the test data. Therefore, the article uses Grubbs method to eliminate the abnormal data in the sample, and discusses several key technical problems of the Grubbs method in the grouting design parameter control application.