Design of multi-segment in situ soil sampler testing bulk density

To improve efficiency and veracity of soil sampling in testing bulk density, the cutting ring method and in situ soil tube method were combined and a multi-segment in situ soil sampler was designed. This soil sampler was composed of sampling device and sampler separation device. The results show that the method of multi-segment in situ soil tube can effectively guarantee undisturbed sampling soil and improve sampling efficiency by 400%～800% compared with cutting ring method.