Water drainage anchor rod and construction method

Abstract

The invention discloses a water drainage anchor rod which has the water drainage function and can protect a metal anchor bar or a metal anchor cable from corroding at the same time. The water drainage anchor rod comprises the anchor bar or the anchor cable which is connected with an outer anchor steel plate, and is characterized in that the anchor bar or the anchor cable is sleeved with a soil engineering bag, impervious concrete and pervious concrete are poured inside the soil engineering bag and outside the soil engineering bag respectively, and the water drainage anchor rod comprising an impervious reinforced concrete anchoring body and a pervious plain concrete anchoring body is formed. An outer anchoring pier is formed in the mode that the impervious concrete and the pervious concrete are poured on the end portion of the outer anchoring steel plate and the end portion of the anchor bar or the anchor cable. A construction method of the water drainage anchor rod comprises the steps of making construction preparation, drilling holes, conducting slip casting and pouring the outer anchoring pier. According to the construction method, the anchor rod construction and the water drainage system construction are combined together. The construction method is simple, the time limit for a project is short, the cost is low, the adopting of the soil engineering bag can effectively control the diameters or the wall thicknesses of the impervious reinforced concrete anchoring body and the pervious plain concrete anchoring body, a bloating bag is arranged, after the impervious concrete is poured, an expanding disc is formed, and the biting force between the anchoring bodies and a rock and earth mass can be effectively increased.

Description

technical field [0001] The invention relates to the technical field of geotechnical anchoring engineering, in particular to a drainage anchor and a construction method. Background technique [0002] The reinforcement of rock and soil slopes with anchor bolts is one of the important methods commonly used in the engineering field; seepage water in rock and soil is often the culprit of landslide damage in rock and soil slopes. In actual engineering, affected by factors such as irregular construction and soil deposition, the drainage holes of the slope retaining structure and the filter layer behind the structure are prone to clogging, resulting in the failure of the drainage function of the filter drainage system of the slope retaining project; The contact surface between the anchor rod and the rock-soil body often becomes a permeable water channel, resulting in corrosion damage to the anchor rod, loss of anchoring force, and finally causing engineering accidents such as slope ...

AI Technical Summary

Problems solved by technology

However, in the current existing technologies that combine drainage channels and bolt reinforcement and support, they are basically at the expense of weakening the anchoring force, and the influence of water on the corrosion of the bolt has not been considered.

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