A pressure-bearing plate anchor pile and its anchoring method

Abstract

The invention discloses a bearing plate type anchor pile and an anchoring method. The bearing plate type anchor pile comprises a bearing plate component and an anchor rod, wherein the bearing plate component is located at the depths of the stratum, the anchor rod is inserted in the stratum and is connected with the bearing plate component, the bearing plate component, the anchor rod and cement soil are combined to form the anchor pile, and the cement soil is formed by wrapping the anchor rod, being poured by cement paste or cement powder and being stirred by vanes of a drill rod. In the process of screwing in the drill rod, the paste is sprayed, the soil is stirred, the bearing plate component is pushed into the stratum and moves in place, then the anchor rod is inserted into an inner hole of the drill rod, the anchor rod is in threaded connection with the bearing plate component, then the drill rod is pulled out, and the bearing plate component, and the anchor rod and the cement soil wrapping the anchor rod are combined together to form the columnar drill rod inner rod embedded stirring type anchor pile; the construction difficulty caused to the hole-forming anchor rod by hole collapse in the processes of hole forming, installation of the anchor rod and the paste pouring is avoided. After the drill rod is pulled out, the next construction can be conducted.

Description

technical field [0001] The invention relates to the technical field of soil excavation, slope stability, and anti-floating and anti-lifting of underground structures, in particular to a drill pipe inner hole implantation and stirring for foundation pit enclosure, slope reinforcement, and anti-lifting and anti-floating of underground structures Anchor piles and anchoring methods. 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 a...

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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 the hole in the center, so the construction difficulty is high. Because the diameter of the steel bar or anchor bar used as the anchor is generally small, the anchoring body's holding force on the steel bar and the anchor bar is too small, and the friction between the anchor body and the soil cannot be fully exerted. , which requires a longer anchor pile length to meet the anchor pull force requirements, increasing the construction cost

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