在进行桥梁结构检测时,采用胶粘拔出法进行混凝土强度测试,不但可以避免破损检测法对结构造成的严重破损,还能够弥补常规非破损法,如回弹法等测试精度不高等缺点。为了便于实际操作,通过比对试验,将一种有机植筋胶作为胶粘拔出法的锚固胶,并设计出了一套可重复利用的钢质锚固件的拉拔系统。比较结果表明,该方法可取得较好效果。在对一批双向钢筋混凝土板的拔出力及其对应的混凝土立方体试块抗压强度进行统计研究分析的基础上,运用最小二乘法,绘制出胶粘拔出法的桥梁结构混凝土强度与拔出力的测强曲线,曲线相关性较好,且相对标准差较小。最后,运用测强曲线,对野外暴露试验站的2片预应力混凝土梁进行胶粘拔出法试验研究,计算值与试验值吻合较好,为胶粘拔出法在桥梁结构混凝土强度测试工程实践中的应用奠定了基础。

In the inspection of bridge structures, the use of the gluing pull-out method for the concrete strength can avoid not only the serious damage to the structures as would occur by using the structural damage detection method, but also the disadvantages of the conventional nondestructive methods, such as the rebound law, such as poor precision. In order to use the gluing pull-out method in the real structures more conveniently, an organic anchorage is employed as the anchoring gum and through comparison, a reusable tensile steel anchoring pull system is designed. The results show that better precision results can be obtained by using this method. Using the statistical analysis method and the least squares method for the pulling forces for a number of two-way reinforced concrete slab and for the corresponding compressive strength of concrete test cubes, the curves of strength against pulling force for the bridge structure are obtained. The results show that better correlations and smaller relative standard deviations can be achieved. The gluing pull-out method is also used in the field exposure tests of two prestressed concrete beams by using the strength curves. The results show that the calculated values are in good agreement with the experimental values.