Sand taking device for geotechnical exploration

The utility model relates to the technical field of geotechnical exploration, and discloses a geotechnical exploration sand taking device which comprises a supporting frame, a sampling barrel and a bearing sleeve, inserting rods are connected to the two sides of the front face of the supporting frame in a penetrating mode, rotating shafts are fixedly connected to the two sides of the sampling barrel, and one end of each rotating shaft is rotationally connected to the inner wall of a penetrating hole. A nut seat is fixedly connected to the top of the sampling barrel, a spiral blade shaft is fixedly connected to the bottom end of a threaded rod, sand outlet pipes communicate with the two sides of a bearing sleeve, the upper side of an inner ring of the bearing sleeve is fixedly connected to the outer side wall of the sampling barrel, and a guide barrel is fixedly connected to the bottom of the bearing sleeve; a connecting bearing is installed on the outer side of the sand outlet pipe, and an L-shaped pipe is in