超声波检测注浆效果的研究

ULTRASONIC DETECTION OF GROUTING EFFECT

用超声波进行了模拟砂岩单孔、岩石灌浆结石体和井筒壁后注浆测试，得出了声速ｖｐ与裂隙宽度Ｂ之间为指数函数关系，ｖｐ与单轴抗压强度Ｒ、灌浆后时间ｔ成幂函数关系．提出了用声速提高值Ｔｖ来评价注浆质量和效果的新论断，建立了评价注浆质量和效果的标准，即Ｔｖ＞５０％为注浆较佳段；Ｔｖ＝５％～５０％为合格段；０＜Ｔｖ＜５％为一般段；Ｔｖ＜０为较差段。

Ultrasonic technique is applied to check the result of simulation test of a single hole in sandstone, the grouting of snake stone test, and the result of shaft grouting. It is found the relation between sound velocity,υ_p,width of cracks, B is an exponential function. And the relation among v_p, uniaxial compressive strength, R and time after grouting, t, is a power function. It is proposed to use the increment of sound velocity , T_v, to evaluate the quality and result of grouting. A criterion is established for evaluation of the quality and result of grouting.That is, when Tv> 50%, it is the best section of grouting, Tv= 5%～50%, qualified section, 0<Tv<5%, fairly good section, Tv<0, worse section.