回弹和弹性波专用测强曲线比较研究

Comparative Study of Special Strength Curves for Rebound Method and Elastic Wave Method

试验的原材料是在施工工地现场进行取样,对成型好的试块在三种养护条件下进行养护.室内试块按设计龄期进行弹性波法测试、回弹法测试以及抗压强度测试,得出数据,绘制出专用测强曲线.现场试验是在隧洞左右侧墙进行弹性波法和回弹法测试,并在所测测区进行现场芯样的钻取,得出测试数据,并与专用测强曲线进行比较,得出修正距离.选取50个测区,分别利用两种专用公式计算出强度,最后依据修正距离进行强度修正,从而分析两种方法修正后的强度差值.

The raw materials of test were extraced at the construction site,and the well-formed concrete blocks were cured under three curing conditions. Concrete blocks were subjected to test at the age of design. The test contents included elastic wave method test,rebound method test and compressive strength test,and finally the data were obtained and special strength curve were drawed. The construction site test on the left and right side walls of the tunnel,which included elastic method test and rebound method test,field core samples were drilled in area of test,the data were obtained,and correction distance were obtained as compared to the special strength curve. The strength data were got at50 test areas,which were obtained by using two special strength formulas. Finally,the strength were amended on the basis of corrected distance,the difference of corrected strength were analyzed between two methods.