Pile foundation bearing capacity detection device and detection method thereof

The invention relates to the technical field of pile foundation detection, in particular to a pile foundation bearing capacity detection device. The pile foundation bearing capacity detection device comprises a pile foundation body and a clamping sleeve, the top end of the pile foundation body is clamped with the interior of the clamping sleeve, a connecting seat is bolted to the top of the clamping sleeve, a main water tank is clamped to the top of the connecting seat, the top of the main water tank communicates with a water injection pipe, the top end of the water injection pipe communicates with a water pump, and connecting rings are bolted to the periphery of the bottom of the connecting seat. According to the pile foundation bearing capacity detection device, the main water tank and a plurality of branch water tanks are used as containers for accommodating counterweights, water is injected into the main water tank and the branch water tanks to increase the weight of the device for detection, the water ca