水泥混凝土路面板底脱空检测方法研究

Research on Method of Void Identification Beneath Concrete Slabs

FWD检测混凝土板底脱空是国内外广泛使用的方法,但目前我国公路管养部门极少配备这种仪器。为满足目前水泥混凝土路面养护的需要,本文探索用贝克曼梁检测混凝土板横缝处和板中弯沉,应用Winkeler地基板的弯沉与荷载关系式,反算板中和板边处地基反应模量,通过对比该模量判定混凝土板底是否脱空。该法得到了现场验证。

FWD,widely used to identify voids beneath concrete slabs in developed countries,only a few Chinese highway maintenance administrative departments are equipped with this kind of instrument.In the paper based on the deflection at the transverse joint and the center of slabs measured with Beckelman Beam,the method of void identification is established by comparing the back-calculated Winkeler foundation reaction modulus at the edge of transverse joint and the center of slabs.And it was experimentally verified by the field test.