Sand sampler for geotechnical investigation

The utility model discloses a geotechnical investigation sand sampler, which comprises a base and a sand sampling cylinder, a screening mechanism is arranged on the base, a moving component is arranged on the base, the screening mechanism comprises a mounting plate which is fixedly arranged in the sand sampling cylinder, a double-shaft motor is fixedly arranged at the bottom of the mounting plate, and the moving component is arranged on the mounting plate. A first rotating rod and a second rotating rod are fixedly mounted at the output end of the double-shaft motor, a drill bit is fixedly mounted at the bottom of the first rotating rod, a remote controller is fixedly mounted at the bottom of the mounting plate, and a sieve plate fixedly connected with the top of the second rotating rod is rotatably mounted in the sand taking cylinder. And sliding blocks are fixedly mounted on the two sides of the sieve plate. According to the rock and soil investigation sand taking device, by installing the screening mechanis