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Method for anchor bolt construction by double sleeve

A technology of bolt construction and double casing, which is applied in the directions of bolt installation, earthwork drilling, infrastructure engineering, etc., can solve the problems of high cost, long construction period, poor safety, etc., so as to reduce construction cost, shorten construction period and improve construction. safety effect

Inactive Publication Date: 2004-03-10
贾金青
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above method has the disadvantages of high cost, long construction period and poor safety during construction.

Method used

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  • Method for anchor bolt construction by double sleeve
  • Method for anchor bolt construction by double sleeve

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Embodiment Construction

[0014] The construction schematic diagram of the inventive method is as figure 1 As shown, first use a drill bit larger than the design diameter of the bolt to percussion drill a large hole to a certain depth, and drive the outer pipe 2 with an outer diameter smaller than or equal to the diameter of the above-mentioned large hole and an inner diameter larger than the designed diameter of the bolt into the large hole 1. The top of the pipe 2 is 10 to 20 cm above the ground, and then the outer pipe is fixed with the fixing rib 3; use a drilling rig to drill the anchor hole 4 through the outer pipe 3 to the design depth according to the designed hole diameter of the anchor, and in the above-mentioned anchor hole 4 Put in the inner tube 5, the diameter of the inner tube is slightly smaller than the design aperture of the anchor rod, and the insertion depth is slightly deeper than the gravel layer, and the upper end of the inner tube is fixed on the outer tube 2 with a fixed bracket...

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Abstract

A method for constructing anchor rod by dual-casing method includes drilling a big hole, driving an external pipe into said big hole, fixing it with fixing bars, drilling hole for anchor rod via the external pipe, inserting internal pipe in it, fixing its upper end to said external pipe, inserting reinforcing bars for anchor rod, pouring cement mortar, and pulling the internal and external pipes out. Its advantages are short period, low cost and high safety. It is suitable for macadam stratum.

Description

technical field [0001] The invention relates to a method for bolt construction using a double-casing method, which belongs to the technical field of foundation and foundation engineering, and in particular to a construction method for an anti-floating bolt and a foundation pit support bolt. Background technique [0002] The construction method of current anti-floating anchor and foundation pit support anchor is to drill to the design depth according to the design aperture of the anchor, and then lay anchor tendons and pour mortar to form the anchor. However, if the anchor bolt encounters a gravel layer, it will be difficult to form a hole or even fail to construct. Therefore, in gravel strata, large-diameter reinforced concrete anti-floating piles are usually used for anti-floating problems of underground buildings; cast-in-situ piles with large pile diameters, small spacing, and large amount of reinforcement are used for foundation pit support. The above method has the dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/80E21D20/00
Inventor 贾金青王福全
Owner 贾金青
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