Core-pulling type horizontal sand well used for deep-seated landslide drainage

Abstract

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.

Description

technical field [0001] The invention relates to the field of landslide control engineering, in particular to a core-pulling horizontal sand well used for drainage of deep landslides. Background technique [0002] Landslide disasters are often closely related to groundwater dynamic conditions. Especially for wading landslides, the groundwater level has a great impact on the stability of landslides. For wading landslides, the greater the rate of river water level drop, the hysteresis effect of groundwater level The stronger it is, the less stable the landslide will be. How to quickly drain water and reduce the softening and seepage effects of groundwater on rock and soil is a hot topic in the rock and soil community. [0003] Landslide control projects generally focus on retaining works, supplemented by drainage, or with little consideration. According to the on-site investigation of landslide prevention projects in the Three Gorges Reservoir area and the Wenchuan earthquake...

AI Technical Summary

Problems solved by technology

[0005] (1) If it is difficult to excavate by machinery and labor during construction, blasting is required, which will greatly disturb the landslide;

[0006] (2) The construction cost is relatively high, so it is difficult to form a network drainage; the construction period is long

[0007] (3) People need to enter the corridor for construction. If the landslide is in the deformation stage, there will be safety hazards

[0008] (4) If only horizontal water collection holes are used instead of core-pulling structures, the drainage holes will often be blocked due to factors such as hole wall collapse and sediment influx.

Its maintenance is difficult and expensive

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