Recoverable type anchor rod, pressure-bearing plate type anchor pile and anchoring method

Abstract

The invention discloses a recoverable type anchor rod, a pressure-bearing plate type anchor pile and an anchoring method. The recoverable type anchor rod comprises an anchor rod body, wherein a sleeve is sleeved on a whole section of the anchor rod body, an anchor head at the tail portion of the anchor rod body and the head portion of the anchor rod body are exposed out of the sleeve, two ends of the sleeve are in fixedly sealing connection with the anchor rod body, a gap is reserved between the sleeve and the anchor rod, and threads are machined on the head portion of the anchor rod body. The anchor pile comprises a pressure-bearing plate assembly and the anchor rod body, wherein the pressure-bearing plate assembly is arranged deep in a ground layer, the anchor rod is inserted in the ground layer and in thread connection with the pressure-bearing plate assembly, the anchor rod body is integrally a free section, and the pressure-bearing assembly and cement soil arranged on the periphery of the anchor rod body in a wrapping mode are combined to form the anchor pile. During construction, a drill rod is screwed inside to stir soil and push the pressure-bearing plate assembly into the ground layer simultaneously, the anchor rod body is then inserted into an inner hole in the drill rod to be in thread connection with the pressure-bearing plate assembly, and the drill rod can be pulled out. The anchor rod body can be retracted and cannot be reserved in the ground as an obstacle, and social resources can be saved.

Description

technical field [0001] The invention relates to the technical field of soil excavation, slope stability and underground structure anti-floating and anti-lifting, in particular to a recyclable bolt and anchor for foundation pit enclosure, slope reinforcement and underground structure anti-lifting and anti-floating Pile and anchoring method. Background technique [0002] Soil nail support and bolt support are widely used in foundation pit enclosure engineering and slope stabilization engineering. The cost of soil nail support is low and the construction is convenient, but the length and diameter of the soil nail are small, and the average pullout force is small. , is only applicable to general strata, so the scope of application is small, and often cannot meet the design requirements, and this kind of soil nails cannot be prestressed well, and the pull-out resistance is not strong, so they cannot play a good role; The length, diameter and pullout resistance are greater than t...

AI Technical Summary

Problems solved by technology

[0002] Soil nail support and bolt support are widely used in foundation pit enclosure engineering and slope stabilization engineering. The cost of soil nail support is low and the construction is convenient, but the length and diameter of the soil nail are small, and the average pullout force is small. , is only applicable to general strata, so the scope of application is small, and often cannot meet the design requirements, and this kind of soil nails cannot be prestressed well, and the pull-out resistance is not strong, so they cannot play a good role; The length, diameter and pullout resistance are greater than those of soil nails, but their cost is relatively high. The construction needs to go through two processes of drilling first, then inserting metal materials, and then grouting, which cannot be completed at one time, which increases the cost; Filling soil, soft soil, silt, silt, and sand and pebbles are easy to collapse holes, making it difficult to form holes. Generally, full-sleeve hole forming is used to form holes. It is easy to collapse holes in the middle, so the construction is difficult

[0003] Because the steel bar or anchor bar used as the anchor rod is generally small in diameter, the anchoring body has a small grip on the steel bar and anchor bar, and the friction between the anchor body and the soil cannot be fully exerted, so a longer anchor pile length is required. It can meet the requirements of anchor tension and increase the construction cost

Furthermore, after the existing anchor rods and cement soil are solidified into piles, when the construction is completed, especially after the support function is completed as a part of the support structure, they usually cannot be recycled and become underground obstacles, which is also a waste to a certain extent. The material is increased, the cost is increased, and the recyclable anchor is the development trend of the anchor

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