Construction method for mechanical hole reaming of anchor rod

A technology of reaming bolt and construction method, which is applied in drilling equipment and methods, earthwork drilling, infrastructure engineering and other directions, can solve the problem of large reaming randomness of blasting method, irregular shape of water scouring reaming, mechanical parameters problems such as decline, to achieve the effect of significant economic benefits, protection of inherent strength, and small support resistance

Inactive Publication Date: 2007-05-16
CHINA JINGYE ENG
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AI Technical Summary

Problems solved by technology

However, the shape of the hole reaming by water scouring is very irregular, and the erosion weakens the rock and soil itself, and its mechanical parameters decrease; w

Method used

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  • Construction method for mechanical hole reaming of anchor rod
  • Construction method for mechanical hole reaming of anchor rod
  • Construction method for mechanical hole reaming of anchor rod

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Embodiment Construction

[0025] In the steps of the mechanical reaming anchor bolt construction method of the present invention, it can be seen that the primary problem is to expand one or a plurality of conical anchor bolt holes at the bottom or sequentially expand a plurality of conical anchor bolt holes at different heights on the basis of the cylindrical anchor bolt holes. While reaming, the water supply system feeds water, flushes the cuttings and cleans the hole wall, and then adds prestressed tendons to the anchor hole, and then pours cement mortar into the anchor hole with a grouting pump and a grouting pipe connected to it. Pure cement slurry makes the slurry and the prestressed tendons hold and wrap together, and anchor together with the surrounding rock and soil strata or structures to form a hard anchor.

[0026] The structure of the mechanical reamer used in the present invention is shown in Figure 1, and it comprises the central cylinder 2 of sliding sleeve and hollow central shaft 3, and...

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Abstract

The invention involves an anchorage method to reinforcing and maintaining the layer of rock and soil, namely the construction method of producing the prestress anchor bolt using the mechanical reaming reamer. It includes drilling, reaming, washing and slip casting, the slurries are wrapped with the prestress dabber together and are solidified to forming the anchor bolt. The second slip casting is needed after the first slip casting according the design requirements; the second slip casting adopts high pressure splitting casting pipe or many pipes. The construction method of the invention applies to ground layers with different soil strata, it can work in the direction of horizontal angle is 0~90degree, it is equipped with cylinderin volumes and conical reaming volumes along the length of the anchor bar; it can ream only once, and can ream many times or for many volumes, and they are connected with each other for a whole to increasing the contact area between the anchor bolt and the rock or soil. Because of the combination of the effect of anchor bolt end bearing and the effect of friction, it doubles the carrying capacity of anchor bolt and correspondingly shortens the length of the anchor bolt, so it has significant economic benefits.

Description

technical field [0001] The invention relates to an anchoring method for reinforcing and maintaining rock and soil layers, in particular to a construction method for making prestressed anchor rods by using a mechanical reamer. Background technique [0002] In geotechnical engineering, prestressed bolt technology is the most vital new technology. One end of the prestressed anchor rod is connected to the rock and soil mass or structure, and the other end is anchored in the rock and soil, and prestressed to it, and becomes an anchoring system that transmits tension to a stable rock and soil mass to withstand rock and soil pressure, The structural tension generated by water pressure, anti-floating, anti-overturning, etc. is used to maintain the stability of rock and soil and structures. However, the straight-hole cylindrical bolt commonly used in the engineering field has the fatal weakness of low bearing capacity. In order to improve the bearing capacity of the bolt, the rock a...

Claims

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Application Information

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IPC IPC(8): E02D5/74E02D15/04E21B7/28
Inventor 刘波杨松胡建林柳建国程良奎张培文
Owner CHINA JINGYE ENG
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