CN215482933U - Integrated auxiliary device for anchor cable tensioning construction and acceptance check - Google Patents
Integrated auxiliary device for anchor cable tensioning construction and acceptance check Download PDFInfo
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- CN215482933U CN215482933U CN202121846278.2U CN202121846278U CN215482933U CN 215482933 U CN215482933 U CN 215482933U CN 202121846278 U CN202121846278 U CN 202121846278U CN 215482933 U CN215482933 U CN 215482933U
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Abstract
The utility model discloses an integrated auxiliary device for anchor cable tensioning construction and acceptance inspection, which comprises a steel pad pier (6) fixed above a concrete anchor pier (4), wherein a channel type bearing platform (9) is arranged above the steel pad pier (6), a feed-through type jack (10) is arranged above the channel type bearing platform (9), and a tool anchorage device (11) and a tool clamping piece (12) are arranged above the feed-through type jack (10); the bottom of the inner side of the channel type bearing platform (9) is provided with a working anchor (7) and a working clamping piece (8) which are fixed above the orifice of the steel pad pier (6); a limiting plate (13) matched with the channel type bearing platform (9) is further arranged above the working clamping piece (8); an anchor cable duct (1) is arranged below the concrete anchor pier (4), and a steel sleeve (3) fixed on the concrete anchor pier (4) is arranged in the anchor cable duct (1). The utility model has the characteristics of convenient operation, effective reduction of workload and efficiency improvement.
Description
Technical Field
The utility model relates to an anchor cable circular tensioning construction device, in particular to an anchor cable tensioning construction and acceptance inspection integrated auxiliary device.
Background
Currently, anchor cables are widely used in geotechnical anchoring engineering, which utilize the tensile force and prestress applied by the stratum bearing structure to reinforce unstable parts of rock mass or establish effective support for the structure. Before the anchor cable is formally tensioned, the single steel strand needs to be pre-tensioned, the pre-tensioning stress is 0.1 sigma con-0.2 sigma con (sigma con-design tensioning force), after the stress of each pre-stressed steel strand of the anchor cable is uniform, the cyclic tensioning acceptance check is carried out, and finally the formal tensioning is carried out to load the locking load.
Technical specification of supporting engineering of rock-soil anchor rods and sprayed concrete (GB50086-2015) requires that anchor cables are subjected to a cyclic tensioning acceptance test. At present, a single-cycle or multi-cycle test is carried out under the pre-tightening state of an anchor cable, a manual matching hoist is generally adopted, a front clamping type jack is used for carrying out single pre-tightening on a steel strand, and a through type jack is used for carrying out cyclic tensioning on the anchor cable. After the test is finished, the working clamping piece is required to be placed in the jacking process and after the pre-tightening stress is released, and the jack is reinstalled to perform single pre-tightening of the steel strand and formal tensioning construction of the anchor cable. The whole cycle tensioning acceptance and formal tensioning construction has large workload, difficult operation and low efficiency, and the pretensioning stress loss is caused after the cycle tensioning is withdrawn, the jack needs to be assembled and disassembled again for pretensioning and formal tensioning, so that the effective connection of the cycle tensioning and formal tensioning construction cannot be realized. Meanwhile, the conditions of falling off of the cable body, difficult jacking and the like easily occur in the operation processes of assembling and disassembling the jack and placing the working clamping piece, thereby causing test failure or casualty accidents. Therefore, the prior art has the problems of difficult operation, large operation workload and low safety.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an integrated auxiliary device for anchor cable tensioning construction and acceptance inspection. The utility model has the characteristics of convenient operation, effective reduction of workload and improvement of operation safety.
The technical scheme of the utility model is as follows: the integrated auxiliary device for anchor cable circular tensioning acceptance and formal tensioning construction comprises a steel pad pier fixed above a concrete anchor pier, wherein a channel-type bearing platform is arranged above the steel pad pier, a feed-through jack is arranged above the channel-type bearing platform, and a tool anchorage and a tool clamping piece are arranged above the feed-through jack; the bottom of the inner side of the channel type bearing platform is provided with a working anchorage and a working clamping piece which are fixed above the steel pad pier hole; a limiting plate matched with the channel type bearing platform is further arranged above the working clamping piece; and an anchor cable pore passage is arranged below the concrete anchor pier, and a steel sleeve fixed on the concrete anchor pier is arranged in the anchor cable pore passage.
In the integrated auxiliary device for cyclic tensioning acceptance and formal tensioning construction of the anchor cable, the channel type bearing platform comprises a steel ring stand column, an upper bearing plate is arranged at the upper end of the steel ring stand column, a lower bearing plate is arranged at the lower end of the steel ring stand column, and a stiffening rib is arranged on the outer side of the steel ring stand column; the steel ring stand lateral wall still is equipped with perpendicular guide slot, is equipped with on the lower bolster with perpendicular guide slot matched with opening, is equipped with the spacing groove on the perpendicular guide slot, is equipped with spacing fixture block in the spacing inslot.
In the integrated auxiliary device for anchor cable cyclic tensioning acceptance and formal tensioning construction, the stiffening rib is further provided with a lifting lug.
In the integrated auxiliary device for anchor cable circulating tension acceptance and formal tension construction, the limiting plate comprises a circular plate body matched with the channel-type bearing platform, limiting plate anchor holes are formed in the circular plate body, and limiting guide blocks are arranged at two ends of the circular plate body.
In the integrated auxiliary device for anchor cable circular tensioning acceptance and formal tensioning construction, the limiting groove is positioned at the lower part of the vertical guide groove, and the width of the limiting groove is greater than that of the vertical guide groove.
Compared with the prior art, the utility model consists of a steel pad pier, a channel type bearing platform, a feed-through jack, a tool anchor, a tool clamping piece, a working anchor, a working clamping piece, a limiting plate, an anchor cable pore channel and a steel sleeve; the channel type bearing platform is simple in structural design and flexible to operate, a working anchorage device, a working clamping piece and the steel strand in a fastening state can synchronously move in the steel ring stand column, the purposes of cyclic loading and unloading are met, and the technical problems that the existing cyclic tension test is difficult to withdraw the jack, the pre-tightening stress loss after withdrawing the jack and the like are successfully solved. Meanwhile, the channel type bearing platform is provided with the guide groove and the limiting groove, the movement of the working clamp and the working clamping piece can be limited by matching with the limiting plate, the seamless connection of the circulating tensioning acceptance and the formal tensioning of the prestressed anchor cable is realized, the device dismounting and re-pre-tightening links before the subsequent formal tensioning are reduced, the situations that a cable body is easy to fall off, the roof is difficult to retreat and the like in the jack loading and unloading and working clamping piece laying operation process are avoided, the operation safety risk is effectively reduced, and the channel type bearing platform is particularly suitable for the acceptance of the large-inclination-angle threaded anchor cable. In conclusion, the utility model has the characteristics of convenient operation, capability of effectively reducing the workload and improving the operation safety.
Drawings
FIG. 1 is a schematic view of the installation of the present invention;
FIG. 2 is a schematic cross-sectional view A-A of the channel platform;
FIG. 3 is a schematic cross-sectional view B-B of the channel platform;
FIG. 4 is a schematic view of a limiting clip;
FIG. 5 is a three-dimensional perspective view of the channel cap;
fig. 6 is a three-dimensional perspective view of the stopper plate.
The labels in the figures are: 1-anchor cable duct, 2-steel strand, 3-steel sleeve, 4-concrete anchor pier, 5-bolt, 6-steel pad pier, 7-working anchor, 8-working clip, 9-channel bearing platform, 10-penetrating jack, 11-tool anchor, 12-tool clip, 13-limiting plate, 901-upper bearing plate, 902-steel ring upright post, 903-stiffening rib, 904-lower bearing plate, 905-vertical guide groove, 906-limiting groove, 907-limiting fixture block, 908-lifting lug, 131-circular plate body, 132-limiting plate anchor hole and 133-limiting guide block.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not to be construed as limiting the utility model.
Examples are given. An integrated auxiliary device for anchor cable tensioning construction and acceptance inspection is formed as shown in figures 1 to 6 and comprises a steel pad pier 6 fixed above a concrete anchor pier 4, a channel type bearing platform 9 is arranged above the steel pad pier 6, a feed-through type jack 10 is arranged above the channel type bearing platform 9, and a tool anchorage 11 and a tool clamping piece 12 are arranged above the feed-through type jack 10; the bottom of the inner side of the channel type bearing platform 9 is provided with a working anchor 7 and a working clamping piece 8 which are fixed above the orifice of the steel pad pier 6; a limiting plate 13 matched with the channel type bearing platform 9 is further arranged above the working clamping piece 8; an anchor cable duct 1 is arranged below the concrete anchor pier 4, and a steel sleeve 3 fixed on the concrete anchor pier 4 is arranged in the anchor cable duct 1.
The channel type bearing platform 9 comprises a steel ring upright post 902, an upper bearing plate 901 is arranged at the upper end of the steel ring upright post 902, a lower bearing plate 904 is arranged at the lower end of the steel ring upright post 902, and a stiffening rib 903 is arranged on the outer side of the steel ring upright post 902; the side wall of the steel ring upright post 902 is further provided with a vertical guide groove 905, the lower bearing plate 904 is provided with an opening matched with the vertical guide groove 905, the vertical guide groove 905 is provided with a limit groove 906, and the limit groove 906 is internally provided with a limit fixture block 907.
The limiting plate 13 comprises a circular plate body 131 matched with the channel-type bearing platform 9, limiting plate anchor holes 132 are formed in the circular plate body 131, and limiting guide blocks 133 are arranged at two ends of the circular plate body 131.
And the concrete anchor pier 4 and the steel pad pier 6 are fixedly connected through a bolt 5.
The limiting groove 906 is located at the lower position of the vertical guide groove 905, and the width of the limiting groove 906 is larger than that of the vertical guide groove 905.
During construction, the working anchorage device, the working clamping piece, the limiting plate, the channel type bearing platform, the feed-through jack, the tool anchorage device and the tool clamping piece are sequentially arranged on the steel strand in a penetrating mode. The steel pad pier is fixedly connected to the concrete anchor pier through a bolt, a working anchorage and a working clamping piece are sequentially installed on the upper portion of a steel pad pier hole, and the working anchorage, the working clamping piece and the steel strand are in a locking state under the action of 0.1 sigma con-0.2 sigma con pre-tightening stress. The channel type bearing platform is arranged on the steel pad pier, the lower bearing plate is in direct contact with an upper bearing plate of the steel pad pier, the working anchorage device and the limiting plate are covered in the channel of the steel ring upright post, and the upper part of the upper bearing plate is provided with the feed-through jack. The upper part of the piston of the feed-through jack is sequentially provided with a tool anchorage and a tool clamping piece.
The channel type bearing platform is composed of an upper bearing plate, a steel ring upright post, a stiffening rib, a lower bearing plate, a guide groove, a limiting fixture block and a lifting lug. All the components are welded and manufactured by high-strength steel plates with the thickness of about 2cm, wherein the thicknesses of the stiffening ribs and the limiting clamping blocks can be properly increased. The steel ring upright is cylindrical, and stiffening ribs are uniformly distributed outside the steel ring upright and welded on the steel ring upright in equal length; the two ends of the steel ring upright post and the stiffening rib are respectively connected with the upper bearing plate and the lower bearing plate; 2 vertical guide grooves are symmetrically arranged on the steel ring upright post and the lower bearing plate between the adjacent stiffening ribs; a limiting groove is arranged at the lower part of the vertical guide groove; the lifting lugs are axially arranged on the stiffening ribs or the upper and lower bearing plates.
The concrete anchor pier, the steel pad pier, the working anchor, the limiting plate, the channel type bearing platform, the feed-through jack and the tool anchor are coaxially and centrally installed with the anchor cable duct.
The steel ring inner diameter of the steel sleeve and the steel pad pier is consistent, and the steel sleeve and the steel pad pier are embedded in the concrete anchor pier and the anchor cable duct after being coaxially welded.
The blanking length of the steel strand can ensure that the length of the steel strand exposed by the tool anchor is about 20-30 cm after the tool anchor is installed, so that smooth installation and tensioning, loading and unloading operations of the device are ensured.
The working anchorage device and the tool anchorage device are all cylindrical steel bodies, wherein the relation between the diameter of the working anchorage device and the size of other components is as follows: the diameter of the steel pier orifice is less than the diameter of the working anchorage device, less than the diameter of the limiting plate and less than the inner diameter of the channel type bearing platform steel ring upright post; the shape and size of the tool anchorage device are matched with the model of the through jack for use.
The inner diameter of the upper bearing plate of the channel type bearing platform is less than that of the lower bearing plate, namely the inner diameter of the steel ring upright post, and the upper bearing plate is not in contact with the steel strand; the inner diameter of the lower bearing plate and the inner diameter of the steel ring upright post are slightly larger than the diameters of the working anchorage device and the limiting plate; the external diameter of the lower bearing plate is slightly smaller than the external diameter of the upper base plate of the steel pad pier, so that the stress of the channel type bearing platform is uniformly transmitted to the steel pad pier and the concrete anchor pier.
The height of a steel ring upright post of the channel type bearing platform is equal to the sum of 1.3-1.5 times of a theoretical elongation value of an anchor rope calculated under 1.2 sigma con (permanent anchor rope) or 1.1 sigma con (temporary anchor rope) (considering that the maximum deviation of an actual measurement elongation value of a rock-soil body anchor rope and the theoretical elongation value is 10% is 3-5 times), the height of a working anchorage device and the height of a limiting plate. In the loading and unloading process of cyclic tensioning, the working anchorage, the working clamping piece and the steel strand in a fastening state and the limiting plate which is not limited to be clamped move synchronously in the channel type bearing platform steel ring upright column without touching the upper bearing plate.
The limiting plate is a cylindrical steel body with the same thickness, the thickness of the limiting plate is about 3-5 cm, and 2 limiting guide blocks are symmetrically arranged on the limiting plate. The width of the limiting guide block is slightly smaller than the width of the guide groove, and the diameter of the limiting plate is smaller than the inner diameter of the steel ring upright post of the channel type bearing platform, so that the limiting plate and the limiting guide block can smoothly move in the steel ring upright post along the guide groove. The limiting plate is evenly provided with anchor holes corresponding to the number and the positions of the steel strands, and the aperture of each anchor hole is larger than the diameter of a single steel strand but smaller than the diameter of the anchor hole of the working anchorage device.
The limiting groove is arranged at the lower part of the guide groove, and the width of the limiting groove is greater than that of the guide groove; the height of the bottom edge is equal to the sum of the installation heights of the pre-tightened working anchorage device, the working clamping piece and the limiting plate, namely the lower edge of the limiting groove is flush with the upper edge of the limiting guide block; the height of the limiting groove is equal to the thickness of the limiting fixture block, so that the limiting fixture block is inserted into the limiting groove in a sealing manner, and the limiting plate, the working anchorage device at the lower part of the limiting plate and the working clamping piece are limited to move.
The through jack is used for carrying out graded loading and unloading, so that the working clamp and the working clamping piece in a locking state and the limiting plate which is not limited to be clamped are synchronously moved in the channel of the channel type bearing platform steel ring upright post channel along with the release and the expansion of the steel strand without contacting with the upper bearing plate, and the graded loading and unloading of the prestress anchor cable circular tensioning are realized.
The loading stage number of the circular tensioning is not less than 5, and the initial load and the final pressure relief holding load are equal to the pre-tightening stress before the circular tensioning of 0.1 sigma con-0.2 sigma con. The maximum test load of the permanent anchor cable is 1.2 sigma con, and the maximum test load of the temporary anchor cable is 1.1 sigma con times. The tensioning loading and unloading are slow and stable, the loading speed is controlled to be 50-100 KN/min, the unloading speed is controlled to be 100-200 KN/min, and the pressure stabilizing time of each level of load is not lower than the design and specification requirements.
The limiting plate, the working anchorage and the working clamping piece after the circular tensioning and unloading are retracted to the initial position along with the steel strand, but the anchor cable is still in a pre-tightening state of 0.1 sigma con-0.2 sigma con, and the pre-tightening stress is not lost. The lower edge of the limiting groove is flush with the upper edge of the limiting guide block, and the two limiting fixture blocks are closely inserted into the limiting groove to limit the limiting plate, the lower working anchorage device and the working clamping piece of the limiting plate to move along with the stretching of the steel strand, so that the subsequent formal tensioning loading and locking can be carried out.
And (3) gradually loading according to design and standard requirements in the formal tensioning process, controlling the maximum load of the rock anchor rope to be 1.05 sigma con-1.10 sigma con, and enabling the over-tensioning force to be not greater than a design allowable value. The tensioning loading and unloading are slow and stable, the loading speed does not exceed 0.1 sigma con, the unloading speed does not exceed 0.2 sigma con, and the load holding and pressure stabilizing time of each stage is not lower than the design and specification requirements.
Claims (5)
1. Anchor rope stretch-draw construction, the integrated auxiliary device who checks and accept, its characterized in that: the device comprises a steel pad pier (6) fixed above a concrete anchor pier (4), wherein a channel-type bearing platform (9) is arranged above the steel pad pier (6), a feed-through jack (10) is arranged above the channel-type bearing platform (9), and a tool anchorage device (11) and a tool clamping piece (12) are arranged above the feed-through jack (10); the bottom of the inner side of the channel type bearing platform (9) is provided with a working anchor (7) and a working clamping piece (8) which are fixed above the orifice of the steel pad pier (6); a limiting plate (13) matched with the channel type bearing platform (9) is further arranged above the working clamping piece (8); an anchor cable duct (1) is arranged below the concrete anchor pier (4), and a steel sleeve (3) fixed on the concrete anchor pier (4) is arranged in the anchor cable duct (1).
2. The anchor cable tensioning construction and acceptance integrated auxiliary device of claim 1, which is characterized in that: the channel type bearing platform (9) comprises a steel ring upright post (902), an upper bearing plate (901) is arranged at the upper end of the steel ring upright post (902), a lower bearing plate (904) is arranged at the lower end of the steel ring upright post (902), and a stiffening rib (903) is arranged on the outer side of the steel ring upright post (902); the steel ring stand (902) lateral wall still is equipped with perpendicular guide slot (905), is equipped with on lower carrier plate (904) with perpendicular guide slot (905) matched with opening, is equipped with spacing groove (906) on perpendicular guide slot (905), is equipped with spacing fixture block (907) in spacing groove (906).
3. The anchor cable tensioning construction and acceptance integrated auxiliary device according to claim 2, characterized in that: lifting lugs (908) are further arranged on the stiffening ribs (903).
4. The anchor cable tensioning construction and acceptance integrated auxiliary device according to claim 2, characterized in that: the limiting plate (13) comprises a circular plate body (131) matched with the channel-type bearing platform (9), limiting plate anchor holes (132) are formed in the circular plate body (131), and limiting guide blocks (133) are arranged at two ends of the circular plate body (131).
5. The anchor cable tensioning construction and acceptance integrated auxiliary device according to claim 2, characterized in that: the limiting groove (906) is positioned at the lower part of the vertical guide groove (905), and the width of the limiting groove (906) is larger than that of the vertical guide groove (905).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121846278.2U CN215482933U (en) | 2021-08-09 | 2021-08-09 | Integrated auxiliary device for anchor cable tensioning construction and acceptance check |
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| CN202121846278.2U CN215482933U (en) | 2021-08-09 | 2021-08-09 | Integrated auxiliary device for anchor cable tensioning construction and acceptance check |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565091A (en) * | 2021-08-09 | 2021-10-29 | 国网新源控股有限公司 | Anchor rope circulation stretch-draw is checked and is accepted and formal stretch-draw construction's integration auxiliary device |
-
2021
- 2021-08-09 CN CN202121846278.2U patent/CN215482933U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565091A (en) * | 2021-08-09 | 2021-10-29 | 国网新源控股有限公司 | Anchor rope circulation stretch-draw is checked and is accepted and formal stretch-draw construction's integration auxiliary device |
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