Construction method of prestressed anchor cable through anchor cable hole

Abstract

The application discloses a construction method for prestressed anchor cable passing through an anchor cable hole, and comprises the following steps: using a construction protection tool for the prestressed anchor cable passing through the anchor cable hole; a hollow roller rolling provides axial rolling support for anchor cable swinging; the elastic force of the hollow roller provides radial rolling buffering for the anchor cable; the hollow roller can provide radial displacement compensation for the anchor cable around the radial outer periphery of the steel sleeve, so that the anchor cable swinging impact on the steel sleeve is avoided and damage is prevented, and the problem that the swinging radial impact of the anchor cable lowering cannot be reduced is solved, and the swinging of the non-lowered section of the anchor cable is reduced.

Description

Technical Field

[0001] This invention relates to a construction method for prestressed anchor cables passing through anchor cable holes, belonging to the field of foundation pile anchor cable construction technology. Background Technology

[0002] When reinforcing slopes with anchor cables, the anchor cables need to be lowered into the anchor cable holes drilled in the anti-slide piles and the slope rock strata. In order to facilitate the workers' operation of lowering the anchor cables, a steel sleeve is inserted into the opening of the anchor cable hole and is suspended in the air at a distance from the anti-slide pile. However, as the anchor cables are lowered into the downward-sloping anchor cable holes, they will swing and impact the steel sleeve, causing damage.

[0003] Existing technologies employ rolling contact to reduce damage to the anchor cable outer sheath. For example, Chinese Patent Publication No. CN212803285U discloses an auxiliary anchor cable installation device in which the anchor cable is placed on a plastic roller. As the plastic roller rolls along the roller shaft, the anchor cable can move forward along the rolling of the plastic roller. Although the rolling plastic roller can reduce the axial impact damage at the steel sleeve opening when the anchor cable is lowered, it cannot reduce the radial impact caused by the swinging of the anchor cable during lowering. The radial impact force is the main factor causing the swaying of the unlowered section of the anchor cable in the steel sleeve. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a construction method for prestressed anchor cables passing through anchor cable holes.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a construction method for prestressed anchor cables passing through anchor holes, comprising: using construction protection fixtures for prestressed anchor cables passing through anchor holes.

[0007] The construction process is as follows: the anchor cable is lowered into the steel casing with the support of hollow rollers and then further lowered into the anti-slide piles and the downward-sloping anchor cable holes of the rock slope. When the anchor cable swings, the hollow rollers can rotate on the force ring, providing axial rolling support for the anchor cable swing. The elastic force of the hollow rollers provides radial rolling buffer for the anchor cable. Based on the fact that the hollow rollers can rotate around the steel casing on the force ring, the hollow rollers provide radial displacement compensation for the anchor cable, avoiding the anchor cable swinging and impacting the steel casing and causing damage. This solves the problem of not being able to reduce the radial impact of the anchor cable swinging during lowering and reduces the swing generated in the unlowered section of the anchor cable.

[0008] The construction protection fixtures for the prestressed anchor cable through the anchor cable hole include: When in use, insert the steel sleeve installed in the downward-sloping anchor cable hole; Hollow rollers are installed at the opening of the steel casing, where they roll along the axial line of the anchor cable and can rotate radially around the outer circumference of the steel casing.

[0009] The hollow rollers are a plurality of circumferentially spaced rollers, and the spacing between the hollow rollers is less than that between the anchor cables.

[0010] The steel sleeve is rotatably mounted with a steel sleeve; a force-bearing ring is mounted on the steel sleeve via a support rod, the force-bearing ring being larger than the outer diameter of the steel sleeve and spaced at the opening end of the steel sleeve.

[0011] The steel sleeve is rotatably installed on the steel casing via bearings.

[0012] The hollow roller is mounted on the force-bearing ring, based on a steel sleeve, and can rotate around the radial outer circumference of the steel sleeve.

[0013] The force-bearing ring is fixed with spacer rings to space out the multiple hollow rollers from each other.

[0014] The support rods are arranged in a circumferentially spaced array, and both ends of the support rods are fixed to the force ring and the steel sleeve.

[0015] The hollow roller is made of elastic rubber and can provide elastic force; the hollow roller has a central gap inside and can be rotatably mounted on the force-bearing ring.

[0016] The beneficial effects of this invention are as follows: the rolling hollow roller provides axial rolling support for the anchor cable swing, the elastic force of the hollow roller provides radial rolling buffer for the anchor cable, and the hollow roller can provide radial displacement compensation for the anchor cable around the radial outer circumference of the steel sleeve, avoiding the anchor cable swinging and impacting the steel sleeve and causing damage. This solves the problem of not being able to reduce the radial impact of the anchor cable swing during lowering, and reduces the swing generated in the section of the anchor cable before lowering. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the construction protection tooling used in this invention on anti-slide piles; Figure 2 This is a schematic diagram of the construction protection tooling of the present invention; In the diagram: 1-steel sleeve; 11-anti-slide pile; 12-rock slope; 13-anchor cable hole; 2-steel sleeve; 3-support rod; 4-force ring; 5-hollow roller; 6-anchor cable. Detailed Implementation

[0018] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0019] like Figures 1 to 2 As shown.

[0020] This application discloses a construction protection fixture for prestressed anchor cables passing through anchor holes, comprising: A steel sleeve 1 is inserted into the downwardly inclined anchor cable hole 13 in the anti-slide pile 11 and the rock slope 12; The steel sleeve 2 is rotatably mounted on the steel sleeve 1 via the tapered roller bearing. The steel sleeve 2 can only be taken out from the steel sleeve 1 away from the anti-slip pile 11 and ends at the tapered roller bearing. The steel sleeve 1 is provided with a step and the inner ring of the tapered roller bearing is installed through key matching, so that it will not slide down and approach the anti-slip pile 11. The steel sleeve 2 is fitted on the outer ring of the tapered roller bearing. A force-bearing ring 4 is installed at the opening of the steel sleeve 2 via an inclined support rod 3. The support rod 3 consists of multiple rods arranged in a circumferentially spaced array, and both ends of the support rod 3 are welded and fixed to the force-bearing ring 4 and the steel sleeve 2, respectively.

[0021] A hollow roller 5 made of elastic rubber is rotatably mounted on the force-bearing ring 4, so that the hollow roller 5 can provide elastic force.

[0022] The hollow roller 5 has a central gap inside and can be rotatably mounted on the force-bearing ring 4. The hollow roller 5 is rotatably mounted on the force-bearing ring 4 at multiple intervals.

[0023] The spacing between the force-bearing rings 4 is smaller than that between the anchor cables 6, so as to prevent the anchor cables 6 from swinging and getting stuck between the hollow rollers 5.

[0024] This application discloses a construction method for passing a prestressed anchor cable through an anchor cable hole, comprising: using a construction protection fixture for passing a prestressed anchor cable through an anchor cable hole.

[0025] The construction process is as follows: the anchor cable 6 is lowered into the steel sleeve 1 with the hollow roller 5 as support, and then further lowered into the downwardly inclined anchor cable hole 13 of the anti-slide pile 11 and the rock slope 12. When the anchor cable 6 swings, the hollow roller 5 can rotate on the force ring 4, providing axial rolling support for the swing of the anchor cable 6. The elastic force of the hollow roller 5 provides radial rolling buffer for the anchor cable 6. The hollow roller 5 provides radial displacement compensation for the anchor cable 6 based on the fact that the steel sleeve 2 can rotate around the steel sleeve 1 on the force ring 4, thus avoiding the anchor cable 6 swinging and impacting the steel sleeve 1 and causing damage. This solves the problem of not being able to reduce the radial impact of the anchor cable swinging during lowering, and reduces the swing generated in the unlowered section of the anchor cable 6.

Claims

1. A construction method for threading prestressed anchor cables through anchor holes, characterized in that, include: Construction protective equipment for using prestressed anchor cables through anchor holes; The construction protection fixtures for the prestressed anchor cable through the anchor cable hole include: When in use, insert the steel sleeve (1) into the downwardly inclined anchor cable hole (13); Hollow roller (5) is installed at the opening of steel sleeve (1) and can roll along the axial line of anchor cable (6) and rotate around the radial outer circumference of steel sleeve (1). The hollow rollers (5) are a plurality of circumferentially spaced arrays, and the spacing between the hollow rollers (5) is less than that between the anchor cables (6); The steel sleeve (1) is rotatably mounted with a steel sleeve (2); a force-bearing ring (4) is mounted on the steel sleeve (2) via a support rod (3), the force-bearing ring (4) being larger than the outer diameter of the steel sleeve (2) and spaced at the opening end of the steel sleeve (2); The hollow roller (5) is made of elastic rubber and can provide elastic force; the hollow roller (5) has a central gap inside and can be rotatably mounted on the force ring (4); The construction process is as follows: the anchor cable (6) is lowered into the steel sleeve (1) with the hollow roller (5) as support and then lowered into the anti-slide pile (11) and the downward inclined anchor cable hole (13) of the rock slope (12). When the anchor cable (6) swings, the hollow roller (5) can rotate on the force ring (4) to provide axial rolling support for the swing of the anchor cable (6). The elastic force of the hollow roller (5) provides radial rolling buffer for the anchor cable (6). The hollow roller (5) can rotate around the steel sleeve (1) on the force ring (4) to provide radial displacement compensation for the anchor cable (6) and avoid the anchor cable (6) from swinging and impacting the steel sleeve (1) and breaking.

2. The construction method for prestressed anchor cables passing through anchor holes as described in claim 1, characterized in that: The hollow roller (5) is mounted on the force ring (4) with the steel sleeve (2) as the base and can rotate around the radial outer circumference of the steel sleeve (1).

3. The construction method for prestressed anchor cables passing through anchor holes as described in claim 1, characterized in that: The force-bearing ring (4) is fixed with a spacer ring to space the multiple hollow rollers (5) from each other.

4. The construction method for passing prestressed anchor cables through anchor holes as described in claim 1, characterized in that: The support rods (3) are arranged in a circular array with multiple rods spaced apart. The two ends of the support rods (3) are fixed to the force ring (4) and the steel sleeve (2).

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