Press-in gravity sampler for sludge storage yards and dredge fill fields and sampling method

The invention provides a press-in gravity sampler structure for acquiring a high-water content flow state soft soil or sludge undisturbed sample in a sludge field or dredge fill field and an installation and using method. The press-in gravity sampler structure can sample according to the conditions of soft flow state soil in the depth direction of the sludge storage yards and dredge fill fields. The whole structure of the sampler comprises three parts: 1) a fixed semi-cylinder, 2) a sliding semi-cylinder, and 3) an internal transverse separation insert piece. The sampler adopts modular designand can control sample separation length as well as the size of a sampling region and sampling precision. During use, the sampler is simple, light, simple and convenient in operation, high in efficiency and low in sampling cost.