CN219490918U

CN219490918U - Side slope anchor rod pulling resistance test positioning device

Info

Publication number: CN219490918U
Application number: CN202320569007.XU
Authority: CN
Inventors: 张鹏; 赵元科; 王军军
Original assignee: Gansu Academy Of Transportation Sciences Group Co ltd
Current assignee: Gansu Academy Of Transportation Sciences Group Co ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-08-08
Anticipated expiration: 2033-03-22

Abstract

The utility model discloses a positioning device for a side slope anchor rod pulling resistance test, belongs to the technical field of test detection, and aims to solve the problem that eccentric tension of an anchor rod is easy to occur in the side slope anchor rod pulling resistance test. The device comprises a bottom plate and a hollow jack, wherein the bottom plate is erected on a side slope, a bottom anchor rod hole is formed in the bottom plate, an anchor rod extending out of the ground is embedded in the side slope, the device further comprises a top plate and an angle adjusting device, the top plate is arranged on the bottom plate, a top anchor rod hole is formed in the top plate, and the anchor rod sequentially penetrates through the bottom anchor rod hole, the top anchor rod hole and the jack; the angle adjusting device comprises a support which is arranged on two circular shafts and can rotate, the first circular shaft can freely slide back and forth along the top surface of the bottom plate, the two ends of the top plate are respectively hinged with the bottom plate and the other end of the support, and the first circular shaft can drive the support and the top plate to adjust the angle when sliding back and forth along the top surface of the bottom plate. The utility model has simple structure, convenient processing and controllable cost, and can ensure that the anchor rod is always axially pulled in the pulling resistance test process and cannot be bent and deformed.

Description

Side slope anchor rod pulling resistance test positioning device

Technical Field

The utility model belongs to the technical field of test detection, and particularly relates to a positioning device for a side slope anchor rod pulling resistance test.

Background

The anchor rod reinforcement technology is widely applied to reinforcement engineering of various unstable slopes, and the axial pulling resistance of the anchor rod is one of core parameters of anchor rod design. Whether the slope engineering can keep stable and safe for a long time or not, the function of the anchor rod is important. Therefore, the pulling resistance of the anchor rod is also a key detection index in the detection of engineering construction quality.

The most common method for detecting the pulling resistance of the anchor rod at present is an anchor rod pulling resistance test, and the main test steps are as follows: 1. leveling the surface of a rock-soil body near the installation of the anchor rod; 2. penetrating the pre-buried anchor rod through the test steel backing plate to ensure that the steel backing plate is well contacted with the surface of the rock-soil body; 3. installing a hollow jack, enabling the anchor rod to pass through the jack, and enabling the bottom surface of the jack to be in contact with the steel backing plate; 4. and the hydraulic pump is connected to apply pressure to the jack.

The anchor rod is not perpendicular to the rock body surface but is in an oblique relation with the rock body surface at a certain angle when being designed, and the anchor rod is bent due to the eccentricity between the anchor rod and the jack in the process of applying the tensile force by adopting the anti-pulling force test method. On the one hand, the bending deformation can damage the anchor rod to a certain extent, and on the other hand, the eccentric tension state of the anchor rod cannot be regarded as the actual working state of the anchor rod, so that the measured pulling resistance is not the actual and accurate axial pulling resistance of the anchor rod.

In order to ensure that the true and reliable axial pulling resistance of the anchor rod can be measured in the test, the axial centers of the anchor rod and the jack are required to be ensured to be the same, and a side slope anchor rod pulling resistance test positioning device is provided by a tester aiming at the field protrusion problem.

Disclosure of Invention

The utility model aims to provide a positioning device for a side slope anchor rod pulling resistance test, which is used for solving the problem that the anchor rod is easy to eccentrically pull in the side slope anchor rod pulling resistance test.

In order to solve the problems, the technical scheme of the utility model is as follows:

the side slope anchor rod pulling resistance test positioning device comprises a bottom plate and a hollow jack, wherein the bottom plate and the hollow jack are erected on a side slope, a bottom anchor rod hole is formed in the bottom plate, an anchor rod extending out of the ground is embedded in the side slope, the side slope pulling resistance test positioning device further comprises a top plate and an angle adjusting device, wherein the top plate and the angle adjusting device are arranged on the bottom plate, a top anchor rod hole is formed in the top plate, and the anchor rod sequentially penetrates through the bottom anchor rod hole, the top anchor rod hole and the jack; the device comprises a support, wherein two ends of the support are hinged to a first round shaft and a second round shaft, the first round shaft can freely slide back and forth along the top surface of a bottom plate, two ends of a top plate are respectively hinged to the bottom plate and the other end of the support, and the first round shaft can drive the support and the top plate to adjust angles when sliding back and forth along the top surface of the bottom plate.

Further, the round shaft I is connected with a corresponding threaded push rod through a group of three-hole push heads, push rod limiting parts are arranged on three sides of the bottom plate, the round shaft I freely slides back and forth in a group of symmetrical push rod limiting part grooves, and the other end of the threaded push rod penetrates out of the unilateral push rod limiting part.

Further, a first plate connecting piece and a second plate connecting piece are arranged on the top plate, a bottom connecting piece is arranged on the bottom plate, and the first plate connecting piece is hinged with the bottom connecting piece; the second plate connecting piece is hinged with the other end of the bracket through a second round shaft.

Further, an angle pointer is arranged on the first plate connecting piece, an angle scale is arranged on the bottom connecting piece, and the angle pointer and the angle scale are mutually matched. The angle indication can accurately control the angle of the device, so that the acting direction of the jack is completely consistent with the axial direction of the anchor rod, the axial tension of the anchor rod is ensured, the actual axial pulling resistance of the anchor rod is measured, and the engineering construction quality is accurately judged. The adjustable angle of the combined structure ranges from 0 degrees to 60 degrees, and the combined structure is basically suitable for all common anchor rod reinforcement side slope protection projects.

Further, a fastening nut is arranged at one end and the other end of the round shaft; a fastening nut is arranged at the hinge joint of the first plate connecting piece and the bottom connecting piece; a fastening nut is arranged at the hinge joint of the second plate connecting piece and the bracket; a fastening nut is arranged at the positions of the threaded push rod and the unilateral push rod limiting piece. The screw is used for unscrewing when adjusting the angle and fastening when testing.

Further, a group of handles are arranged on the top plate. Can be disassembled and carried on site, and is convenient to reuse.

The beneficial effects of the utility model are as follows:

(1) The combination of the top plate, the bottom plate and the angle adjusting device replaces a steel backing plate in a conventional anchor rod pulling resistance test, and the round shaft I freely slides back and forth along the top surface of the bottom plate to drive the bracket and the top plate to adjust the angle, so that the top plate is perpendicular to the anchor rod included angle, and further the jack and the anchor rod are ensured not to generate any eccentricity. The axial tension of the anchor rod is ensured, the actual axial pulling resistance of the anchor rod is measured, and the engineering construction quality is accurately judged.

(2) The utility model has simple structure, convenient processing and controllable cost, is prepared from Q235A steel, has enough rigidity and stability, can ensure that the anchor rod is always axially pulled in the pulling resistance test process, and can not be bent and damaged due to eccentric pulling.

Drawings

FIG. 1 is a schematic diagram of the working state of a slope anchor rod pulling resistance test positioning device;

FIG. 2 is a three views of a roof in a slope anchor rod pullout resistance test positioning device;

FIG. 3 is a three views of a bottom plate of a slope anchor rod pullout resistance test positioning device;

fig. 4 is a three views of an angle adjusting device in a slope anchor rod pulling resistance test positioning device.

The reference numerals are as follows: 1-a top plate; 11-jacking the anchor rod hole; 12-first plate connector; 13-plate connector two; 14-angle pointer; 15-a handle; 2-a bottom plate; 21-bottom anchor holes; 22-bottom connection; 23-push rod limiting piece; 24-angle scale; 3-an angle adjusting device; 31-circle axis I; 32-a second round shaft; 33-a scaffold; 34-three-hole push head; 35-a threaded push rod; 4-anchor rod; 5-jack; 6-slope.

Detailed Description

As shown in figures 1-4, the positioning device for the side slope anchor rod pulling resistance test is arranged below an anchor rod 4 pre-buried in a side slope 6 and a hollow jack 5 for the pulling resistance test. The device specifically comprises a top plate 1, a bottom plate 2 and an angle adjusting device 3.

A roof bolt hole 11 is formed in the center of the roof plate 1, a group of first plate connecting pieces 12, second plate connecting pieces 13 and a handle 15 are arranged on the roof plate 1, and an angle pointer 14 is arranged on the first plate connecting pieces 12.

A bottom anchor rod hole 21 is formed in the center of the bottom plate 2, a group of bottom connecting pieces 22 are arranged at one end of the bottom plate 2, the bottom connecting pieces 22 are hinged with the first plate connecting piece 12, a fastening nut is arranged at the hinged position, an angle scale 24 is arranged on the bottom connecting pieces 22, and the angle pointer 14 is matched with the angle scale 24; the rest three sides of the bottom plate 2 are provided with push rod limiting pieces 23.

The angle adjusting device 3 comprises a rotatable bracket 33 arranged on a first round shaft 31, the other end of the bracket 33 is respectively hinged with a second group of plate connecting pieces 13 through two ends of a second round shaft 32, a fastening nut is arranged at the hinge position, the first round shaft 31 can freely slide back and forth along the top surface of the bottom plate 2, and the bracket 33 and the top plate 1 can be driven to adjust the angle during sliding.

In this embodiment, the structure for adjusting the angle between the bracket 33 and the top plate 1 is:

the round shaft I31 is connected with a corresponding threaded push rod 35 through a group of three-hole push heads 34, fastening nuts are arranged at two ends of the round shaft I31, the round shaft I31 freely slides back and forth in a group of symmetrical push rod limiting piece 23 slots, and the other end of the threaded push rod 35 penetrates out of the unilateral push rod limiting piece 23 and is provided with a fastening nut.

The jack 5 is vertically arranged on the top plate 1, and the anchor rod 4 sequentially passes through the bottom anchor rod hole 21, the top anchor rod hole 11 and the jack 5.

When the anchor rod 4 and the jack 5 are eccentric, the angle of the bracket 33 can be adjusted by adjusting the extension and withdrawal of the threaded push rod 35 in the push rod limiting piece 23, so as to drive the angle of the top plate 1.

In the embodiment, the top plate 1, the bottom plate 2 and the angle adjusting device 3 are all made of Q235A steel, and the maximum bearing load is designed to be 200KN.

The operation process of the utility model is as follows:

1. leveling the surface of the rock-soil body of the side slope 6 around the anchor rod 4 to be measured, and measuring the slope gradient alpha and the anchor rod inclination angle beta.

2. The anchor rod 4 is passed through the bottom anchor rod hole 21 and the top anchor rod hole 11 of the present utility model from bottom to top. The fastening nuts of all the connecting parts are loosened, the threaded push rod 35 is pushed to push the round shaft I31 forwards or backwards, and then the top plate 1 is slowly lifted or lowered until the nuts of all the parts are screwed when the angle of the angle pointer 14 on the angle scale 24 is theta=90 degrees- (alpha+beta).

3. The hollow jack 5 is penetrated through the anchor rod 4, the bottom of the hollow jack is seated on the top plate 1, at this time, the jack 5 is vertical to the top plate 1, and the anchor rod 4 is coaxial with the jack 5. And (3) connecting a jack oil pump, and applying a pulling force which is 5% of the designed pulling resistance of the anchor rod 1 to pretension so as to enable the jack 5 to be in close contact with the slope surface.

4. The formal loading process takes care of observing whether the angle theta of the angle pointer 14 on the angle scale 24 changes or not, if the change happens, the fastening nut of the device is not screwed, the device is unloaded, and the angle is adjusted and then the test is carried out again.

5. Notice that: the maximum bearing load of the device is 200KN, and the load is not more than 160KN in actual use. The nut and the screw rod should be maintained frequently, rust damage is avoided, and if the phenomenon of sliding wire damage is found, replacement is performed in time.

It should be noted that the structure of the present utility model is also applicable to other loads, and additional materials need to be determined. And will not be described in detail.

Claims

1. The utility model provides a side slope stock resistance to plucking test positioner, includes bottom plate (2) and hollow jack (5) of erectting on side slope (6), be equipped with on bottom plate (2) bottom stock hole (21), side slope (6) pre-buried have stock (4) that stretch out ground, its characterized in that: the novel anchor rod device is characterized by further comprising a top plate (1) and an angle adjusting device (3) which are arranged on the bottom plate (2), wherein a top anchor rod hole (11) is formed in the top plate (1), and the anchor rod (4) sequentially penetrates through the bottom anchor rod hole (21), the top anchor rod hole (11) and the jack (5); the angle adjusting device (3) comprises a support (33) with two ends hinged to a first round shaft (31) and a second round shaft (32), the first round shaft (31) can freely slide back and forth along the top surface of the bottom plate (2), two ends of the top plate (1) are hinged to the bottom plate (2) and the other end of the support (33) respectively, and the first round shaft (31) can drive the support (33) and the top plate (1) to adjust the angle when sliding back and forth along the top surface of the bottom plate (2).

2. The slope anchor rod pullout resistance test positioning device as claimed in claim 1, wherein: the round shaft I (31) is connected with a corresponding threaded push rod (35) through a group of three-hole push heads (34), push rod limiting parts (23) are arranged on three sides of the bottom plate (2), the round shaft I (31) freely slides back and forth in a group of symmetrical push rod limiting parts (23) grooving, and the other end of the threaded push rod (35) penetrates out of the unilateral push rod limiting parts (23).

3. The slope anchor rod pulling resistance test positioning device as defined in claim 2, wherein: the top plate (1) is provided with a group of first plate connecting pieces (12) and second plate connecting pieces (13), the bottom plate (2) is provided with a group of bottom connecting pieces (22), and the corresponding first plate connecting pieces (12) are hinged with the bottom connecting pieces (22); the corresponding second plate connecting piece (13) is hinged with the other end of the bracket (33) through a second round shaft (32).

4. A slope anchor rod pullout resistance test positioning apparatus as claimed in claim 3, wherein: an angle pointer (14) is arranged on the first plate connecting piece (12), an angle scale (24) is arranged on the bottom connecting piece (22), and the angle pointer (14) is matched with the angle scale (24).

5. The slope anchor rod pulling resistance test positioning device as defined in claim 4, wherein: fastening nuts are arranged at two ends of the first round shaft (31); a fastening nut is arranged at the hinge joint of the first plate connecting piece (12) and the bottom connecting piece (22); a fastening nut is arranged at the hinge joint of the second plate connecting piece (13) and the second round shaft (32) and the bracket (33); the screw thread push rod (35) and the unilateral push rod limiting piece (23) are provided with fastening nuts.

6. The slope anchor rod pullout resistance test positioning device as claimed in claim 1, wherein: a group of handles (15) are arranged on the top plate (1).