CN220057937U - Secondary tensioning device for side slope anchor cable - Google Patents

Abstract

The utility model relates to a secondary tensioning device for a slope anchor cable, and belongs to the field of slope protection and retaining engineering. The structure comprises an anchor cable tension member (4) and an auxiliary member (3), wherein the auxiliary member (3) comprises an upper base plate, a lower base plate (33) and a connecting member (32), through holes are formed in the upper base plate (31) and the lower base plate (33), the upper base plate (31) and the lower base plate (33) are arranged at intervals and are connected into a whole through the connecting member (32), one end of the auxiliary member (3) is abutted against the anchor base plate (1), the other end of the auxiliary member is abutted against the anchor cable tension member (4), and a steel strand (2) passes through the auxiliary member (3) along the through holes and is connected with the anchor cable tension member (4). The structure can maximize the utilization of the existing prestressed anchor cable support in the reinforcement scheme, saves the slope disposal cost, is simple and quick, and saves time for secondary slope disposal. The problem that the outer side of the working anchor ring and the anchor backing plate are not on the same plane after the anchor cable is tensioned is solved, and the secondary tensioning difficulty is high is solved.

Description

Secondary tensioning device for side slope anchor cable

Technical Field

The utility model relates to a secondary tensioning device for a slope anchor cable, and belongs to the field of slope protection and retaining engineering.

Background

The existing prestress side slope supporting technology of anchor ropes and double I-steel beams is mature and applied to the side slope reinforcement fields of side slope supporting of deep foundation pits, high side slope supporting of deep cutting, landslide control and the like.

After the construction unit utilizes the anchor cable and the double-word steel beam to perform grouting, tensioning and reinforcing on the side slope according to the design requirement, local developmental micro cracks are likely to occur at the top of the side slope due to the reasons of heavy rainfall, mechanical vibration of the slope toe of the side slope, external disturbance of the side slope and the like for part of the section with poor geology of the side slope.

After the development cracks are generated on the side slope, the detection of the effective drawing force value of the constructed prestressed anchor cable at the weak point of the side slope is a serious issue of the secondary design and reinforcement scheme of the side slope. Because the anchor cable is already stretched, the clamping piece of the anchor cable and the working anchor ring are meshed, and in a secondary anchor cable stretching test pulling force test, the outer side of the working anchor ring is not in the same plane with the anchor backing plate, and the thicknesses of the working anchor rings of different types are different, so that the stretching difficulty is extremely high when the secondary stretching test is performed to measure the pulling force value.

Disclosure of Invention

The utility model aims to solve the technical problems that after the anchor cable is tensioned, the outer side of the working anchor ring and the anchor backing plate are not in the same plane, and the secondary tensioning difficulty is high.

The technical scheme adopted for solving the technical problems is as follows: the secondary stretching device for the side slope anchor cable comprises an anchor cable stretching piece and an auxiliary piece, wherein the auxiliary piece comprises an upper base plate, a lower base plate and a connecting piece, through holes are formed in the upper base plate and the lower base plate, the upper base plate and the lower base plate are arranged at intervals and are connected into a whole through the connecting piece, one end of the auxiliary piece is abutted against the anchor base plate, the other end of the auxiliary piece is abutted against the anchor cable stretching piece, and the anchor cable penetrates through the auxiliary piece along the through holes and is connected with the anchor cable stretching piece.

Wherein, in the above-mentioned structure anchor rope tensioning member is the perforating jack.

Wherein, in the above-mentioned structure, the connecting piece is tubular structure.

Further, in the structure, the connecting piece comprises a plurality of supporting steel bars which are arranged at intervals in the circumferential direction, and two ends of the supporting steel bars are respectively connected with the upper base plate and the lower base plate opposite to the side wall.

Further, in the structure, through holes of the upper base plate and the lower base plate are opposite to each other, and the supporting steel bars are arranged on the outer edge side of the through holes at intervals.

Wherein, the upper backing plate and the lower backing plate in the structure are made of steel plates with the thickness of 10mm to 15 mm.

The beneficial effects of the utility model are as follows: the auxiliary part of the structure is simple and convenient to manufacture, and can be locally obtained and processed in a construction reinforcing steel bar processing field. Under the condition that the end anchor cable is not cut off after the anchor cable is tensioned, the side slope generates crack deformation and the like due to various external reasons, through the auxiliary piece, the penetrating jack and the oil pump can be matched, the residual anchoring force of the anchor cable can be rapidly measured, reliable data support is provided for the side slope reinforcement scheme, the reinforcement scheme can maximally utilize the existing prestress anchor cable support, the side slope treatment cost is saved, and meanwhile, the side slope secondary treatment is simple, convenient and rapid, and the time is saved.

Drawings

Fig. 1 is a schematic structural diagram of the present utility model in practical use.

Fig. 2 is a bottom view of the structure of the auxiliary member of the present utility model.

FIG. 3 is a schematic view of the connection structure of the anchor pad prior to secondary tensioning of the present utility model.

Fig. 4 is a schematic view of the secondary tensioning structure of the present utility model.

Marked in the figure as: 1. an anchor backing plate; 2. steel strand; 3. an auxiliary member; 31. an upper backing plate; 32. a connecting piece; 33. a lower backing plate; 4. an anchor cable tension member; 5. and (5) a tool anchor.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the secondary tensioning device for the side slope anchor cable of the utility model comprises an anchor cable tensioning piece 4 and an auxiliary piece 3, wherein the auxiliary piece 3 comprises an upper base plate 31, a lower base plate 33 and a connecting piece 32, through holes are formed in the upper base plate 31 and the lower base plate 33, the upper base plate 31 and the lower base plate 33 are arranged at intervals and are connected into a whole through the connecting piece 32, one end of the auxiliary piece 3 is abutted against the anchor base plate 1, the other end is abutted against the anchor cable tensioning piece 4, and a steel strand 2 passes through the auxiliary piece 3 along the through holes and is then connected with the anchor cable tensioning piece 4. As will be appreciated by those skilled in the art, the secondary tensioning of the anchor cable is achieved by the anchor cable tensioning member 4 and the auxiliary member 3, the anchor pad 1 is attached to the lower pad 33 by penetrating the tensioned working anchor ring and the redundant steel strands 2 into the through holes of the lower pad 33 of the auxiliary member 3, and the anchor cable tensioning member 4 is attached to the upper pad 31, so that the anchor cable tensioning member 4 contracts to automatically take out the clamping pieces when the anchor cable is tensioned for the second time, and the effect of the pulling force value of the clamping pieces is measured.

Preferably, the anchor cable tension member 4 in the above structure is a penetrating jack. It will be appreciated by those skilled in the art that, for convenience in connecting the steel strand 2 with the anchor cable tension member 4, the anchor cable tension member 4 is preferably a penetration jack, and this structure arrangement allows the redundant steel strand 2 to pass through the penetration jack, so that the front end of the penetration jack is attached to the upper pad 31, and the steel strand 2 at the rear end of the penetration jack is fixed to the tool anchor 5. Simultaneously, the anchor cable is tensioned through the secondary of the penetrating jack, the clamping piece in the working anchor ring is automatically taken out, the deformation amount of the anchor cable is recorded, the numerical value of the drawing force value is converted through the oil pump reading matched with the penetrating jack, and the reading is the residual anchoring force value of the anchor cable in the effective deformation range. Meanwhile, reliable data support is provided for the slope reinforcement scheme, the reinforcement scheme can maximally utilize the existing prestressed anchor cable support, the slope treatment cost is saved, and meanwhile, the method is simple, convenient and quick, and the time is saved for secondary treatment of the slope.

Preferably, the connector 32 has a cylindrical structure. It will be appreciated by those skilled in the art that, for ease of fixing and limiting the steel strand 2, the present structure preferably has a cylindrical structure for the connecting member 32, ensuring that the steel strand 2 uniformly passes through the auxiliary member 3, and ensuring that the secondary tension stress is uniform.

Preferably, the connecting member 32 in the above structure includes a plurality of supporting bars circumferentially spaced apart, and two ends of the supporting bars are respectively connected to the upper pad 31 and the lower pad 33 opposite to the side walls. It will be appreciated by those skilled in the art that the preferred connector 32 comprises a plurality of supporting bars arranged at intervals in the circumferential direction, and both ends of the supporting bars are respectively connected with the upper pad 31 and the lower pad 33 opposite to the side wall, so that the upper pad 31 and the lower pad 33 are arranged at intervals and connected into a whole through the supporting bars, thereby ensuring the structural strength of the auxiliary member 3. Meanwhile, when the number of the steel strands 2 is large and the drawing force is large, the supporting steel bars can be arranged in an encrypted mode.

Preferably, in the above structure, the through holes of the upper pad 31 and the lower pad 33 are disposed opposite to each other, and the supporting bars are disposed at intervals on the outer sides of the through holes. As will be appreciated by those skilled in the art, in order to facilitate the passage of the anchor cable through the auxiliary member 3 during the secondary tensioning, the through holes of the upper and lower tie plates 31 and 33 are preferably disposed opposite each other, and the supporting bars are disposed at intervals on the outer edge sides of the through holes, so that the steel strands 2 pass through the through holes and the connecting members 32.

Preferably, the upper and lower mats 31 and 33 in the above structure are made of steel plates of 10mm to 15 mm. It will be appreciated by those skilled in the art that, in order to facilitate the manufacture of the auxiliary member 3 and reduce the manufacturing cost, the present structure is preferably made of steel plates having 10mm to 15mm for the upper and lower backing plates 31 and 33, and may be actually manufactured by locally available materials at the construction reinforcing bar processing site.

Claims (6)

1. Side slope anchor rope secondary tensioning device, its characterized in that: including anchor rope tensioning member (4) and auxiliary member (3), auxiliary member (3) are including upper padding plate (31), lower bolster (33) and connecting piece (32), be provided with the through-hole on upper padding plate (31) and lower bolster (33), upper padding plate (31) and lower bolster (33) interval set up, and link into an integrated entity through connecting piece (32), auxiliary member (3) one end is in close proximity with anchor backing plate (1), and the other end is in close proximity with anchor rope tensioning member (4), and steel strand wires (2) are connected with anchor rope tensioning member (4) after passing auxiliary member (3) along the through-hole.

2. The secondary slope cable tensioning device of claim 1, wherein: the anchor cable stretching piece (4) is a penetrating jack.

3. The secondary slope cable tensioning device of claim 1, wherein: the connecting piece (32) is of a cylindrical structure.

4. A secondary slope cable tensioning device as in claim 3 wherein: the connecting piece (32) comprises a plurality of supporting steel bars which are circumferentially arranged at intervals, and two ends of each supporting steel bar are respectively connected with the upper backing plate (31) and the lower backing plate (33) opposite to the side wall.

5. The secondary slope cable tensioning device of claim 4, wherein: the through holes of the upper backing plate (31) and the lower backing plate (33) are opposite to each other, and the supporting steel bars are arranged on the outer edge side of the through holes at intervals.

6. The secondary slope cable tensioning device of claim 1, wherein: the upper pad (31) and the lower pad (33) are made of steel plates with the thickness of 10mm to 15 mm.