WO2018098962A1

WO2018098962A1 - Anchor rod pulling resistance testing device

Info

Publication number: WO2018098962A1
Application number: PCT/CN2017/079280
Authority: WO
Inventors: 黄志忠
Original assignee: 广东中科华大工程技术检测有限公司
Priority date: 2016-12-02
Filing date: 2017-04-01
Publication date: 2018-06-07
Also published as: CN106442141A

Abstract

An anchor rod (500) pulling resistance testing device, used to carry out pulling testing on the anchor rod (500) which is mounted on an acting surface, comprising: a substrate (100) used for attaching to the acting surface, an adjustable base (200), a loading mechanism (300) and a beam (400). The adjustable base (200) is arranged on the substrate (100); the beam (400) is erectly provided on the adjustable base (200); and the loading mechanism (300) is provided on the beam (400), and is used for applying a load onto the anchor rod (500). When the anchor rod (500) pulling resistance testing device is used to carry out pulling testing on the anchor rod (500), the substrate (100) is placed on the acting surface, and the loading mechanism (300) is connected to the anchor rod (500) to apply a load onto the anchor rod (500), wherein the load may be transferred in a reverse direction to the adjustable base (200) and the substrate (100) by means of the beam (400). Various angles may be achieved by means of the adjustable base (200) to accommodate the various slope and angle of a location of the anchor rod (500), such as a side slope and a base pit, so as to prevent the anchor rod (500) from deviating under force or being damaged from being bent during the pulling resistance test. The substrate (100) is used to increase a force bearing area of the anchor rod (500) pulling resistance testing device on the acting surface, thus preventing a rock and soil body at the acting surface from being damaged and preventing the testing results from being distorted.

Description

Anchor rod pull-out detection device

Technical field

The present invention relates to the field of building engineering, and more particularly to a bolt pull-out detecting device.

Background technique

In the project, as a main reinforcement or support method, the bolt is widely used in slopes, foundation pits, tunnels, dams, coal mine roadways, etc. It is very important to test the effect of reinforcement. When the anchor is pulled out, the anchor rod is usually pulled out by using a combination of a piercing jack and a loading reaction device as a bolt pull-out detecting device. Since the bolt has a certain range of inclination angle, the angle is usually 15°-35°, and the existing bolt pull-out detecting device is difficult to ensure that the direction of the jack pushing force completely coincides with the central axis of the anchor rod, so that the bolt is pulled. The force is eccentric, the test load can not reflect the actual force of the anchor, and the anchor will also be damaged by a certain degree of bending. In addition, the existing bolt pull-out detection device has obvious effect on the compressive stress of the rock and soil around the anchor rod, which is easy to cause rock and soil damage and the test result is “distorted”.

Summary of the invention

Based on this, the present invention is to overcome the deficiencies of the prior art and to provide a bolt pull-out detecting device.

Its technical solutions are as follows:

The utility model relates to a bolt pull-out detecting device, which is used for pulling and detecting a bolt fixed on an active surface, comprising: a substrate for bonding with an active surface, an adjustable support, a loading mechanism and a beam; The adjustment seat is disposed on the substrate, the beam is mounted on the adjustable support, and the loading mechanism is disposed on the beam and used to apply a load to the anchor. When the anchor rod pull-out detecting device performs the pull-out detection on the anchor rod, the side wall surface of the slope, the foundation pit and the like serves as an action surface, the substrate is placed on the action surface, and the loading mechanism is connected with the anchor rod and applies a load to the anchor rod. The load is transmitted back through the beam to the adjustable support and the substrate. The adjustable support can adjust different angles to adapt to various slopes and angles of the slope, foundation pit, etc. where the anchor is located, avoiding The occurrence of force deviation and bending failure of the anchor-free rod in the pull-out test occurs, and the use of the substrate increases the force-receiving area of the action surface of the bolt pull-out detecting device, thereby avoiding the rock and soil body at the action surface. Destruction and "distortion" of test results.

In one embodiment, the base plate and the adjustable support are two sets, which are respectively disposed on two sides of the anchor rod, and the cross beam spans between the two sets of adjustable supports. The loading mechanism is placed on the symmetrical center of the beam, and the center of symmetry of the beam coincides with the central axis of the anchor.

In one of the embodiments, the distance between the center of the anchor and the side edge of the substrate adjacent to the anchor is greater than or equal to the width of the substrate and greater than 1 m, ensuring reliable detection testing.

In one embodiment, the adjustable support comprises a bottom plate, a carrier plate and a threaded rod, the first end of the bottom plate being rotatably coupled to the first end of the carrier plate, the second end of the bottom plate and the thread One end of the rod is rotatably connected, and the second end of the carrier plate is provided with a long hole, and the other end of the threaded rod passes through the long hole of the carrier plate and is fixed. According to the inclination angle of the anchor rod, the adjustment bearing plate is perpendicular to the central axis of the anchor rod, and the action line of the pulling force is coincident with the central axis of the anchor rod. The length of the elongated hole is greater than the diameter of the threaded rod such that the threaded rod can swing over a length of the elongated hole. After adjusting the angle, adjust the threaded rod perpendicular to the carrier plate and fasten the threaded rod to the carrier plate with a fastening nut.

In one embodiment, the bottom plate and the carrier plate of the adjustable support are hollow rectangular parallelepiped structures, and the hollow rectangular parallelepiped structure is internally provided with ribs to reinforce the hollow rectangular parallelepiped structure and can withstand large loads.

In one embodiment, the long hole and the threaded rod are plural, and the long hole and the threaded rod are evenly spaced along the width direction of the bottom plate or the carrier plate, thereby improving the reliability of the device.

In one embodiment, the area of the substrate is larger than the area of the bottom plate of the adjustable support such that the bottom plate is completely on the substrate, and the bottom plate of the adjustable support is located at an intermediate position of the substrate.

In one embodiment, the beam is two pieces, and the two beams are spaced apart and parallel across the two sets of adjustable supports, and the two ends of the two beams are placed on the carrier plate of the adjustable support. The central axis of the anchor is located between the two beams.

In one embodiment, a pad is provided between the loading mechanism and the beam for transmitting the force, and the load applied by the loading mechanism is uniformly transmitted to the beam.

In one embodiment, the loading mechanism is a jack, and the lower end of the jack is coupled to the anchor.

The beneficial effects of the invention are:

When the anchor rod pull-out detecting device performs the pull-out detection on the anchor rod, the side wall surface of the slope, the foundation pit and the like serves as an action surface, the substrate is placed on the action surface, and the loading mechanism is connected with the anchor rod and applies a load to the anchor rod. The load is transmitted back through the beam to the adjustable support and the substrate. The adjustable support can adjust different angles to adapt to various slopes and angles of the slope, foundation pit, etc. where the anchor is located, and avoid the occurrence of force deviation and bending damage of the anchor in the pull-out test, and adopt The substrate increases the stress area of the action surface of the anchor pull-out detection device, and avoids the damage of the rock and soil at the action surface and the "distortion" of the test result.

The loading mechanism is placed on the symmetrical center of the beam, and the center of symmetry of the beam coincides with the central axis of the anchor. According to the inclination angle of the anchor rod, the adjustment bearing plate is perpendicular to the central axis of the anchor rod, and the action line of the pulling force is coincident with the central axis of the anchor rod. The length of the elongated hole is greater than the diameter of the threaded rod such that the threaded rod can swing over the length of the elongated hole. After adjusting the angle, adjust the threaded rod perpendicular to the carrier plate and fasten the threaded rod to the carrier plate with a fastening nut.

DRAWINGS

Figure 1 is a top plan view of the bolt pull-out detecting device of the present invention;

2 is a schematic view showing the structure of an adjustable support of the bolt pull-out detecting device of the present invention.

Description of the reference signs:

100, substrate; 200, adjustable support; 210, bottom plate; 220, carrier plate; 221, long hole; 230, threaded rod; 240, first hinge mechanism; 250, second hinge mechanism; 260, rib; Fastening Nut; 300, loading mechanism; 400, beam; 500, anchor; 600, pad.

detailed description

The present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of the invention.

As shown in FIG. 1 , a bolt pull-out detecting device is used for pulling and detecting a bolt 500 disposed at a slope, a foundation pit or the like. The anchor 500 has a certain inclination angle with the side wall surface of the slope, the foundation pit or the like. The bolt pull-out detecting device comprises a substrate 100, an adjustable support 200, a loading mechanism 300 and a beam 400. The adjustable support 200 is disposed on the substrate 100. The beam 400 is mounted on the adjustable support 200. The loading mechanism 300 is disposed on the beam 400 and used to apply a load to the anchor.

When the anchor rod pull-out detecting device performs the pull-out detection on the anchor rod 500, the side wall surface of the slope, the foundation pit or the like serves as an action surface, the substrate 100 is placed on the action surface, and the loading mechanism 300 is connected with the anchor rod 500 and the anchor The rod 500 applies a load that is reversely transmitted through the beam 400 to the adjustable support 200 and the substrate 100. The adjustable support 200 can adjust different angles to adapt to various slopes and angles of the slope, foundation pit and the like where the anchor 500 is located, and avoid the occurrence of force deviation and bending damage of the anchor 500 in the pull-out test. At the same time, the use of the substrate 100 increases the stress area of the action surface of the anchor pull-out detection device, thereby avoiding the damage of the rock and soil at the action surface and the "distortion" of the test result.

The substrate 100 and the adjustable support 200 are two sets, which are respectively disposed on two sides of the anchor 500, and the cross beam 400 spans between the two sets of adjustable supports 200. The loading mechanism 300 is disposed on the center of symmetry of the beam 400, and the center of symmetry of the beam 400 coincides with the central axis of the anchor 500.

The distance between the center of the anchor 500 and the side edge of the substrate 100 adjacent to the anchor 500 is greater than or equal to the width of the substrate 100 and greater than 1 m, so that the detection test is reliably performed.

As shown in FIG. 2, the adjustable support 200 includes a bottom plate 210, a carrier plate 220 and a threaded rod 230. The first end of the bottom plate 210 and the first end of the carrier plate 220 are rotatably connected by a first hinge mechanism 240. The second end of the bottom plate 210 is rotatably connected to one end of the threaded rod 230 by a second hinge mechanism 250. In this embodiment, the second hinge mechanism 250 is a hinge support, and the support of the hinge support is fixed on the bottom plate 210. The second end of the support plate 220 is provided with a long hole 221, and one end of the threaded rod 230 and the bottom plate 210 The second hinge mechanism 250 of the second end is hinged, and the other end passes through the long hole 221 of the carrier plate 220 and is fixed. According to the inclination angle of the anchor 500, the adjustment carrier plate 220 is perpendicular to the central axis of the anchor 500, and the action line of the pulling force is coincident with the central axis of the anchor 500.

The bottom plate 210 and the carrier plate 220 of the adjustable support 200 are hollow rectangular parallelepiped structures in which the top surface and the bottom surface are steel plates, and the hollow rectangular parallelepiped structure is internally provided with rib plates 260. The top surface and the bottom surface of the rectangular parallelepiped structure are steel plates, and rib plates 260 are evenly spaced between the steel plates of the top surface and the bottom surface, and the rib plates 260 are arranged in a trapezoidal shape or a mesh shape to reinforce the rectangular parallelepiped structure. Withstand large loads.

The area of the substrate 100 is larger than the area of the bottom plate 210 of the adjustable support 200 such that the bottom plate 210 is completely located on the substrate 100, and the bottom plate 210 of the adjustable support 200 is located at an intermediate position of the substrate 100.

In this embodiment, the length of the long hole 221 is larger than the diameter of the threaded rod 230, so that the threaded rod 230 can swing around the length of the long hole 221 around the second hinge mechanism 250. After the angle is adjusted, the adjustment threaded rod 230 is perpendicular to the carrier plate 220, and the threaded rod 230 is fixed to the carrier plate 220 by a fastening nut 270.

There are a plurality of first hinge mechanism 240, second hinge mechanism 250, long hole 221 and threaded rod 230. In one embodiment, the first hinge mechanism 240, the second hinge mechanism 250, the long hole 221 and the threaded rod 230 are both Three sets, and the first hinge mechanism 240, the second hinge mechanism 250, the long hole 221 and the threaded rod 230 are evenly spaced along the width direction of the bottom plate 210 or the carrier plate 220, thereby improving the reliability of the device.

In one embodiment, the beam 400 is two pieces, and the two beams 400 are spaced apart and parallel across the two sets of adjustable supports 200. The two ends of the two beams 400 are placed on the support of the adjustable support 200. Board 220 Upper, the central axis of the anchor 500 is located between the two beams 400.

In one embodiment, a pad 600 is disposed between the loading mechanism 300 and the beam 400 for transmitting the force, and the load applied by the loading mechanism 300 is uniformly transmitted to the beam 400.

In one embodiment, the loading mechanism 300 is a jack, and the lower end of the jack is connected to the anchor 500. A load is applied to the anchor 500 by the jack, and the beam 400 transmits the load reaction force to the adjustable support 200 and the substrate 100 and the surrounding rock layer.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

The utility model relates to a bolt pull-out detecting device, which is used for pulling and detecting a bolt fixed on an active surface, and is characterized in that: a substrate for adapting to an action surface, an adjustable support, a loading mechanism and a beam The adjustable support is disposed on the substrate, the beam is mounted on the adjustable support, and the loading mechanism is disposed on the beam and used to apply a load to the anchor.
The bolt pull-out detecting device according to claim 1, wherein the base plate and the adjustable support are two groups, which are respectively disposed on two sides of the anchor rod, and the cross beam spans two sets of adjustable support bases. between.
The bolt pull-out detecting device according to claim 2, wherein a distance between a center of the anchor and a side edge of the substrate adjacent to the anchor is greater than or equal to a width of the substrate and greater than 1 m.
The bolt pull-out detecting device according to claim 1, wherein the adjustable support comprises a bottom plate, a carrier plate and a threaded rod, and the first end of the bottom plate is rotatably connected to the first end of the carrier plate, The second end of the bottom plate is rotatably connected to one end of the threaded rod, and the second end of the carrying plate is provided with an elongated hole, and the other end of the threaded rod passes through the long hole of the carrying plate and is fixed.
The bolt pull-out detecting device according to claim 4, wherein the bottom plate and the carrier plate of the adjustable support are hollow rectangular parallelepiped structures, and the hollow rectangular parallelepiped structure is internally provided with ribs.
The bolt pull-out detecting device according to claim 4, wherein the long hole and the threaded rod are plural, and the long hole and the threaded rod are evenly spaced along the width direction of the bottom plate or the carrier plate.
The bolt pull-out detecting device according to claim 4, wherein an area of the substrate is larger than an area of the bottom plate of the adjustable support.
The bolt pull-out detecting device according to any one of claims 2-7, wherein the beam is two pieces, and the two beams are spaced apart and parallel across the two sets of adjustable supports, the anchor rod The central axis is located between the two beams.
The bolt pull-out detecting device according to claim 8, wherein the loader