Vacuum drainage anchor rod and construction method thereof

Abstract

The invention provides a vacuum drainage anchor rod and a construction method thereof. The anchor rod is composed of an anchoring system and a vacuum drainage system; a thread is arranged at the frontend of each hollow anchor pipe, the middle rear part of each hollow anchor pipe is connected with a slurry outlet pipe, water permeable holes are formed in each hollow anchor pipe which is wrapped bya filter screen, a rubber sleeve valve and a geotextile bag sleeve an opening of each slurry outlet pipe, and each geotextile bag is clamped in the corresponding hollow anchor pipe through a hoop; the hollow anchor pipes are obliquely arranged in a slope, pressure grouting is conducted on the interior and the periphery of the front end of each hollow anchor pipe, and the hollow anchor pipes are anchored on backing plates through anchorage devices; a controller and a vacuum pump are installed outside the slope; moisture meters are embedded in the slope and connected with the controller; waterabsorbing pipes penetrate through sealing covers and are inserted into the hollow anchor pipes, connected with a drain pipe through sealing joints and connected with the vacuum pump; the controller and the vacuum pump are switched on, pumping starts to be conducted, a negative pressure zone is formed in each hollow anchor pipe, and the water in the slope enters a water suction pipe and then is discharged out of the slope. Accordingly, the structure is simple, anchorage and drainage can be achieved simultaneously, a good effect is achieved, construction is easy, and the manufacturing cost is low.

Description

technical field [0001] The invention belongs to the technical field of rock-soil anchoring engineering, and in particular relates to a vacuum drainage anchor rod and a construction method thereof, which are mainly applicable to slope and foundation pit engineering. Background technique [0002] Slope instability and landslides are likely to cause casualties and property losses, and are one of the three major geological disasters in the world. At present, anchor rods are widely used in the construction of roads, railways, foundation pits and other projects to strengthen rock and soil slopes. Rainfall or rising groundwater levels will cause water seepage in rock and soil, which not only reduces the strength of the soil, but also forms seepage force. The action of water greatly increases the probability of landslide disasters on slopes. For example, in rainy mountainous areas, various reservoir areas and valley irrigation areas, there are countless landslides caused by water s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a vacuum drainage anchor rod with pressurized drainage consolidation and anchoring functions to solve the problem of poor drainage and anchoring effects in deep slopes and low-permeability soils in the existing integrated technology of anchoring and drainage. Construction method

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