桥梁注浆孔道中冲击弹性波波速特征检验研究

Tests on the Features of Elastic Wave Velocity in Bridge Grouting Tunnel

通过用JL-BPAC(A)检测仪对实际工程中预制箱梁的注浆孔道进行注浆饱满度检测,对检测的数据用χ~2检验法进行正态分布检验,并对结果检验其是否符合一致性。检验结果表明:冲击弹性波在正常的注浆孔道中服从正态分布的传播规律,故其数学平均值可以作为总体的数学期望,揭示了冲击弹性波在注浆孔道中的传播特性;同时也说明了这批孔道注浆属于正常施工的范畴。并根据实际工程中的实际情况,提出了提高孔道注浆饱满度的方法。

This paper checked prefabricated box beam grouting tunnels with JL-BPAC （A） in the actual project. Thenormal distribution of the original data was checked by using the X2 method, and the result consistency wasverified. The results indicate that the impact elastic wave in normal grout duct propagates the rule of normal distribu-tion. The mathematical average value in the tests can be used as an overall mathematical expectation for all the sam-ples, thus disclosing the propagation characteristics of impact elastic wave in grout duct meanwhile showing the nor-mal construction of current duct grouting. The method of improving the completeness of the tunnel grouting israised.