Drilling rig for geotechnical investigation

The invention relates to a drilling rig for geotechnical investigation, and relates to the technical field of investigation equipment, the drilling rig comprises a tank body, a sampler, a driving assembly and a positioning assembly, the driving assembly and the positioning assembly are both arranged on the tank body, and the driving assembly is connected with the sampler and used for driving the sampler to rotate and move in the vertical direction for sampling; the positioning assembly is used for connecting the tank body with the stratum, and the higher the sampling depth of the sampler entering the stratum is, the larger the contact area between the positioning assembly and the stratum is. The soil sampling device can improve the soil sampling efficiency. 本申请涉及一种岩土勘察用钻探装置，涉及勘察设备的技术领域，其包括罐体、取样器以及均设置在罐体上的驱动组件和定位组件，驱动组件与取样器连接且用于驱使取样器转动且沿竖直方向移动进行取样；定位组件用于对罐体与地层进行连接，且取样器进入地层取样的深度越高，定位组件与地层之间的接触面积越大。本申请能够提高土壤取样效率。