The invention relates to a core-pulling type horizontal sand well used for deep-seated
landslide drainage. The core-pulling type horizontal sand well comprises a sand well main body, wherein the sandwell main body has a slope, a
retaining wall is arranged on the
front edge of the slope, a drilling hole is formed in the slope, a core-pulling type horizontal sand well structure is embedded in the drilling hole, and the core-pulling type horizontal sand well structure at least comprises a PVC
pipe, a geotechnical cloth bag, main reinforcements, dual-ring shaped hoopings, sand, a drainage
pipe and a well lid; the geotechnical cloth bag is longitudinally provided with the two dual-ring shaped hoopings; every two adjacent dual-ring shaped hoopings are connected with each other in series by three main reinforcements; one end of the drainage
pipe penetrates through the well lid and is exposed outside; a gap between two
layers of geotechnical cloth is filled with the sand; a drainage hole is formed in the wall of the PVC pipe; the well lid is used for sealing the drilling hole and is flush with the
retaining wall. In the core-pulling type horizontal sand well, the core-pulling type horizontal sand well structure can be connected with the drainage hole in the wall surface of the
retaining wall, so as to form a complete drainage
system, so that the deep-seated
landslide drainage rate isincreased, and the affection on the
landslide stability of underground water is reduced to the maximum extent.