CN109208603B

CN109208603B - Underground tensile anchor rod removing method

Info

Publication number: CN109208603B
Application number: CN201811083660.5A
Authority: CN
Inventors: 林威; 苏利群
Original assignee: Tianjin Jianyan Rock And Soil Engineering Co ltd
Current assignee: Tianjin Jianyan Rock And Soil Engineering Co ltd
Priority date: 2018-09-18
Filing date: 2018-09-18
Publication date: 2020-11-10
Anticipated expiration: 2038-09-18
Also published as: CN109208603A

Abstract

The invention relates to the technical field of anchor rod clearing, in particular to a method for clearing an underground tensile anchor rod, which is characterized by comprising the following steps: the method comprises the following steps of firstly, ascertaining the position of an anchor rod; and step two, the clamping device is stretched into the anchor rod from the underground and clamps the anchor rod, the ground direction of the anchor rod is pulled, the anchor rod is bent, and the space bent below the anchor rod does not influence other constructions. By adopting the method, large-scale operation on the ground is not needed, only a plurality of holes are drilled on the ground by utilizing an excavator, after the position of the anchor rod is ascertained, the anchor rod is clamped by utilizing the clamping device, and then the anchor rod is bent by utilizing tools such as a steel wire rope tension machine and the like, other constructions are not affected in the bent area, and the anchor rod does not need to be pulled out of the ground completely.

Description

Underground tensile anchor rod removing method

Technical Field

The invention relates to the technical field of anchor rod clearing, in particular to a method for clearing an underground tensile anchor rod.

Background

At present, the anchoring technology in geotechnical engineering is to apply anchor rods or anchor cables to reinforce rock masses, fully exert the self-stability capability of the geotechnical masses, and is a reinforcing technology which has the advantages of small disturbance to the original rocks, high construction speed, safety, reliability, economy and effectiveness. The anchor rod can actively reinforce the rock-soil body, effectively control the deformation of the rock-soil body, prevent the collapse and the damage of the rock-soil body, and the anchor rod supporting technology has a plurality of advantages, so that the anchor rod supporting technology becomes a main supporting mode in the field of geotechnical engineering. A part of paddles are arranged on the anchor rod to generate side friction with soil, so that the anchor rod plays a role in fixing. After a building is built, an anchor rod is generally placed in the ground after being fixed and is not taken out under general conditions, but in some cases, for example, if a subway passes through the anchor rod position, the anchor rod needs to be removed.

Disclosure of Invention

The invention aims to overcome the defects of the technology and provide a method for removing an underground tensile anchor rod.

In order to achieve the purpose, the invention adopts the following technical scheme: the underground tensile anchor rod removing method is characterized by comprising the following steps: the method comprises the following steps:

step one, finding out the position of an anchor rod;

and step two, the clamping device is stretched into the anchor rod from the underground and clamps the anchor rod, the anchor rod is pulled towards the ground, the anchor rod is bent, and the space formed by bending the lower surface of the anchor rod does not influence other constructions.

Preferably, in the second step, the clamping device comprises a left clamping plate and a right clamping plate, the upper parts of the left clamping plate and the right clamping plate are hinged and tensioned through a tension spring, the lower parts of the left clamping plate and the right clamping plate are provided with cutting edges, and the inner sides of the left clamping plate and the right clamping plate are symmetrically provided with arc-shaped clamping grooves.

Preferably, in the step one, a probe is adopted for detection, a triangular groove is formed in the bottom of the probe, the top of the probe is connected with the front portion of a breaking hammer of the excavator, the probe enters the ground through vibration of the breaking hammer, and when the breaking hammer cannot continue to move downwards, the anchor rod is detected.

Preferably, in the second step, the position where the clamping device clamps the anchor rod is more than 4 meters and less than 6 meters away from the anchor rod head.

Preferably, in the second step, if the position where the clamping device clamps the anchor rod is the middle position of the anchor rod, the anchor rod needs to be sheared off.

Compared with the prior art, the method has the advantages that large-scale operation on the ground is not needed, only holes are drilled on the ground by using an excavator, after the position of the anchor rod is ascertained, the anchor rod is clamped by using the clamping device, and then the anchor rod is bent by using tools such as a steel wire rope tensile machine, and the like, so that other construction is not affected in the bent area, and the anchor rod does not need to be pulled out of the ground completely.

Drawings

FIG. 1 is a schematic view of a probe according to the present invention;

FIG. 2 is a split view of the clamping device of the present invention;

FIG. 3 is an assembled view of the clamping device of the present invention;

FIG. 4 is a schematic view of the construction of the anchor of the present invention buried in the ground;

fig. 5 is a schematic structural view of the invention after removal of the anchor.

Detailed Description

The following detailed description of the preferred embodiments will be made with reference to the accompanying drawings. As shown in fig. 1 to 5, a method for removing an underground tensile anchor rod includes the following steps:

step one, finding out the position of an anchor rod; adopt probe rod 1 to survey, the bottom of probe rod is equipped with triangle-shaped recess 2, the top of probe rod is connected with the front portion of excavator quartering hammer, utilizes the vibration of quartering hammer to make the probe rod get into the below ground, and when the quartering hammer can't continue downwards, explains and detects stock 8. Because the probe rod bottom sets up triangular recess, has increased the area of surveying, and the probe rod is being played next with one row's mode, so can not lose.

And step two, the clamping device is stretched into the anchor rod from the underground and clamps the anchor rod, the ground direction of the anchor rod is pulled, the anchor rod is bent, and the space bent below the anchor rod does not influence other constructions. Clamping device includes left splint 3 and right splint 4, and the upper portion of left splint and right splint is articulated and taut through extension spring 5, and the lower part of left splint and right splint has sword foot 6, and the inboard symmetry of left splint and right splint is equipped with arc and presss from both sides groove 7. The traction mode adopts a winch or a steel wire rope tension machine to pull the clamping device upwards through a cable. The clamping device enters along the circular hole of the probe rod, the left clamping plate and the right clamping plate are in a closed state in the initial state, when the front end of the probe rod touches the anchor rod, the front parts of the left clamping plate and the right clamping plate overcome the tension of the tension springs to open, the anchor rod enters the two arc-shaped clamping grooves, and therefore the anchor rod is clamped tightly. And after clamping, the anchor rod is pulled upwards, and in the invention, the distance between the position where the clamping device clamps the anchor rod and the anchor rod head is more than 4 meters and less than 6 meters. About five meters, when upwards pulling, the pulling force is greater than the frictional force of stock expansion end, so the stock can become flexible, can the rebound, and the stock just does not influence the passing through of subway with the bottom like this.

In the second step, if the position of the anchor rod clamped by the clamping device is the middle position of the anchor rod, the anchor rod needs to be sheared off. Since the friction of the anchor rod is large if it is sandwiched, the other end of the anchor rod needs to be fused to enable the anchor rod to be picked out.

Compared with the prior art, the method does not need to operate on the ground on a large scale, only needs to use an excavator to drill holes on the ground, clamps the anchor rod by using the clamping device after the position of the anchor rod is ascertained, and then bends the anchor rod by using tools such as a steel wire rope tension machine and the like, so that other constructions are not affected in the bending area, and the anchor rod does not need to be pulled out of the ground completely.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The underground tensile anchor rod removing method is characterized by comprising the following steps: the method comprises the following steps:

step one, detecting the position of an anchor rod, detecting by adopting a probe rod, wherein a triangular groove is formed in the bottom of the probe rod, the top of the probe rod is connected with the front part of a breaking hammer of an excavator, the probe rod enters the ground by utilizing the vibration of the breaking hammer, and when the breaking hammer cannot continue to move downwards, the anchor rod is detected;

step two, the clamping device is stretched into the anchor rod from the underground and clamps the anchor rod, the anchor rod is pulled towards the ground, the anchor rod is bent, and the space formed by bending the lower surface of the anchor rod does not affect other constructions; the clamping device comprises a left clamping plate and a right clamping plate, the upper parts of the left clamping plate and the right clamping plate are hinged and tensioned through a tension spring, the lower parts of the left clamping plate and the right clamping plate are provided with cutting edges, and arc-shaped clamping grooves are symmetrically formed in the inner sides of the left clamping plate and the right clamping plate; the distance between the position where the clamping device clamps the anchor rod and the anchor rod head is more than 4 meters and less than 6 meters; if the position that clamping device presss from both sides tight stock is the intermediate position of stock, need cut the stock, the mode of tractive adopts hoist engine or wire rope pulling force machine to pass through the hawser and is pulling clamping device upwards, clamping device gets into along the round hole of probe rod, initial state left splint and right splint are closed state, when the stock was touchhed to clamping device front end, the pulling force of left and right splint anterior portion overcoming the extension spring opened, the stock enters into two arc clamp grooves, just so press from both sides the stock tightly, it can to pull upwards after pressing from both sides tightly.