Device for measuring porosity of rock-filled roadbed

The utility model discloses a rock-filled roadbed porosity measuring device which comprises two supporting cylinders and two telescopic cylinders, each supporting cylinder is correspondingly provided with two telescopic rods, the two corresponding telescopic rods are installed in the telescopic cylinders, the opposite sides of the two corresponding telescopic rods are provided with rack parts, and the rack parts are installed in the telescopic cylinders. Telescopic adjusting teeth meshed with the two rack parts are arranged in the telescopic cylinder. A water bucket mounting base and a water filling bucket are fixed to the two supporting cylinders, a bottom water outlet hole is formed in the bottom of the water filling bucket, and a water outlet control mechanism is arranged on the bottom water outlet hole. According to the utility model, the two supporting cylinders can be stretched or retracted at the same time, so that the adjustment of the distance between the two supporting cylinders is greatly facilitat