CN112376558A - Anchor rope and anchor backing plate and anchor rope construction method - Google Patents

Abstract

The present invention provides the anchor cable anchor plate and the anchor cable construction method provided by the present invention, wherein the anchor cable anchor plate includes an upper plate, a lower plate and a support bolt arranged between the upper plate and the lower plate; wherein , the upper backing plate is provided with a movable connecting piece that matches the supporting bolt, one end of the supporting bolt is fixedly connected with the lower backing plate, and the other end of the supporting bolt is movably connected with the upper backing plate through the movable connecting piece; A first guide hole is opened on the plate, and a second guide hole corresponding to the first guide hole is opened on the upper plate. The steel strand to be positioned passes through the first guide hole and the second guide hole in turn The anchor clips are connected. Using the above invention, the angle of the anchor plate can be adjusted according to the actual demand to make it perpendicular to the end of the anchor cable (steel strand); and the temporary anchor cable can also be recycled and reused after the project is completed, reducing the construction cost.

Description

Anchor cable anchor plate and anchor cable construction method

technical field

The invention relates to the field of anchor cable construction, and more particularly, to an anchor cable anchor pad and an anchor cable construction method.

Background technique

Anchor cables are anchor systems that transmit tension to stable rock or soil layers. It usually includes a cable body, a grouting body, an anchor, a casing and other connecting devices, wherein the anchor is used to fix the position of the cable body of the anchor cable. As a tension support structure, anchor cable is widely used in large and deep foundation pits. Especially in the water-stop curtain that doubles as a support, its application is particularly important.

The commonly used anchor cables at this stage mostly use OVM anchors, and the existing OVM anchors are composed of clips, anchor plates, spiral bars and corrugated pipes. The anchor plate is fixed on the anchor by the clip, and the force of the anchor is supported by the reaction force of the anchor plate, and the anchor plate must be perpendicular to the steel strand, so as to ensure the reasonable force of the steel strand and the anchor, and at the same time It can also avoid shear deformation of the anchor plate due to the extrusion force of the anchor, resulting in structural damage.

However, in the actual construction process, the concrete pads under the anchor pads are usually uneven; in addition, in deep foundation pit support or high slope support structures, the anchor cables often need to be adjusted according to actual needs The angle of the soil and rock, in this case, will also change the plane angle of the anchor plate. However, the current existing anchor plate has only one fixed structure, the angle cannot be adjusted, and it is one-time use and cannot be reused, which leads to the fact that the aligned anchor cables for deep foundation pit support cannot be recycled. , resulting in a serious waste of construction resources.

Based on the above technical problems, there is an urgent need for a method that can significantly improve the use efficiency of the anchor plate.

SUMMARY OF THE INVENTION

In view of the above problems, the purpose of the present invention is to provide a movable anchor cable anchor plate, which can adjust the angle of the anchor plate according to the actual demand to make it perpendicular to the end of the anchor cable (steel strand); It can also be recycled and reused after the project is completed, reducing construction costs.

In order to achieve the above object, the present invention provides an anchor cable anchor plate, comprising an upper plate, a lower plate and a support bolt arranged between the upper plate and the lower plate; wherein,

The upper backing plate is provided with a movable connecting piece adapted to the supporting bolt, one end of the supporting bolt is fixedly connected with the lower backing plate, and the other end of the supporting bolt passes through the movable connecting piece is movably connected with the top plate; and,

A first guide hole is formed on the lower backing plate, and a second guide hole corresponding to the first guide hole is formed on the upper backing plate, and the steel strand to be positioned passes through the first guide hole, The second guide hole is connected with the anchor clip above the upper backing plate.

In addition, a preferred solution is that a spherical sliding groove is opened in the upper backing plate, the movable connecting piece includes a spherical sliding block that is slidably limited in the spherical sliding groove, and a spherical sliding block is opened in the spherical sliding block. a first threaded hole adapted to the support bolt; wherein,

One end of the support bolt away from the lower backing plate is connected with the spherical slider through the first threaded hole, and the support bolt cooperates with the spherical sliding groove to move with the upper backing plate through the spherical slider connect.

In addition, a preferred solution is that the movable connecting piece further includes a nut seat integrally formed and fixed on the upper end of the spherical slider, and a second thread corresponding to the position of the first threaded hole is opened on the nut seat. hole; in which,

The nut seat extends to the outside of the spherical chute, and the end of the support bolt away from the lower backing plate passes through the first threaded hole and the second threaded hole in sequence and extends to the top of the upper backing plate .

In addition, a preferred solution is that four support bolts are provided between the lower backing plate and the upper backing plate; and,

The four support bolts are respectively connected with the four corner positions of the lower backing plate and the upper backing plate.

In addition, a preferred solution is that one end of the support bolt away from the upper backing plate is fixed to the lower backing plate by welding or by screwing.

In addition, a preferred solution is that the cross-sections of the lower backing plate and the upper backing plate are circular structures or polygonal structures.

In addition, a preferred solution is that both the upper backing plate and the lower backing plate are made of high-strength steel.

In addition, a preferred solution is that the first guide hole is one or more uniformly distributed small holes corresponding to the small holes of the anchor set on the lower backing plate, and the second guide hole is on the upper One or more evenly distributed small holes are opened on the backing plate; and each first guide hole corresponds to the upper and lower positions of each second guide hole.

On the other hand, the present invention also provides an anchor cable construction method, which utilizes the aforementioned anchor cable anchor pad for anchor cable construction, and the construction method includes:

Opening an anchor cable hole at a preset position of the foundation pit rock and clearing the anchor cable hole;

The steel strand bundles at the ends of the anchor cable are passed through the anchor cable holes and then subjected to a splitting process to form at least two steel strands to be positioned;

Install the anchor cable anchor plate at the end of the anchor cable and adjust the position of the anchor cable and anchor plate, so that each steel strand to be positioned passes through the first guide hole and the second guide hole in sequence and then communicates with the upper plate. Perpendicular to each other;

Install anchor clips to clamp and fix each steel strand to be positioned;

The hole of the anchor cable is sealed to realize the fixed connection between the end of the anchor cable and the foundation pit rock.

In addition, a preferred solution is that a support ring beam is fixed on the side of the foundation pit rock close to the anchor cable and anchor plate; and, after the anchor cable and anchor plate is installed, the lower plate and the The support ring beam is extruded and fixed.

According to the above technical content, the anchor cable anchor plate provided by the present invention can realize the angle adjustment of the upper plate of the anchor cable anchor plate by setting the movable connector, and in the actual construction process, the anchor cable anchor plate can be adjusted according to actual needs. The angle of the upper backing plate of the backing plate makes it perpendicular to the end of the anchor cable (steel strand); and for the temporary anchor cable, it can also be recycled and reused after the project is completed, reducing the construction cost.

To achieve the above and related objects, one or more aspects of the present invention include the features hereinafter described in detail. The following description and accompanying drawings illustrate certain exemplary aspects of the invention in detail. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Furthermore, the present invention is intended to include all such aspects and their equivalents.

Description of drawings

Other objects and results of the present invention will become more apparent and readily understood by reference to the following description taken in conjunction with the accompanying drawings, and as the present invention is more fully understood. In the attached image:

1 is a schematic structural diagram of an anchor cable anchor pad according to an embodiment of the present invention;

2 is a cross-sectional view of an anchor cable anchor pad before position adjustment according to an embodiment of the present invention;

3 is a cross-sectional view of an anchor cable anchor pad after the position of the anchor plate is adjusted according to an embodiment of the present invention;

4 is an enlarged view of a construction part of an anchor cable anchor pad according to an embodiment of the present invention;

FIG. 5 is a flowchart of an anchor cable construction method according to an embodiment of the present invention.

The reference numerals include: lower backing plate 11, third threaded hole 111, first guide hole 112, support bolt 12, external thread 121, upper backing plate 13, spherical sliding groove 131, second guiding hole 132, spherical sliding Block 14 , nut seat 141 , steel strand to be positioned 15 , anchor clip 16 , support ring beam 17 , steel strand bundle 18 , foundation pit rock 19 .

The same reference numbers indicate similar or corresponding features or functions throughout the drawings.

Detailed ways

In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It will be apparent, however, that the embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 shows the structure of the cable anchor pad according to the embodiment of the present invention; Fig. 2 illustrates the cross-sectional structure of the cable anchor pad according to the embodiment of the present invention before the position adjustment; The cross-sectional structure of the anchor cable and anchor plate after the position adjustment of the embodiment of the invention; FIG. 4 shows the enlarged construction structure of the anchor cable and anchor plate according to the embodiment of the invention.

1 to 4 , the cable anchor pad provided by the present invention includes an upper pad 13 , a lower pad 11 , and a support bolt arranged between the upper pad 13 and the lower pad 11 . 12; wherein, the upper backing plate 13 is provided with a movable connecting piece that is adapted to the supporting bolt 12, one end of the supporting bolt 12 is fixedly connected to the lower backing plate 11, and the other end of the supporting bolt 12 is connected to the upper washer through the movable connecting piece. The plate 13 is movably connected; and a first guide hole 112 is formed on the lower backing plate 11 , and a second guiding hole 132 corresponding to the first guiding hole 112 is formed on the upper backing plate 13 .

During the actual installation process, the steel strand 15 to be positioned passes through the first guide hole 112 and the second guide hole 132 in sequence and is connected to the anchor clip 16 above the upper backing plate 13. At this time, the steel strand will be pulled The lower backing plate 11 will be squeezed and fixed with the supporting ring beam 17 (generally a reinforced concrete beam) on the foundation pit rock 19, the upper backing plate 13 will bear the reaction force of the anchor clip 16, and these upper backing plates 13 The upper reaction force is transmitted to the lower steel plate through the support bolts 12, and finally transmitted to the support ring beam 17 to realize the tension and fixation of the steel strand 15 to be positioned.

Specifically, in order to realize the position adjustment of the upper backing plate 13 (as shown in Fig. 2 before adjustment and as shown in Fig. 3 after adjustment), a spherical chute 131 is opened in the upper backing plate 13, and the movable connecting piece includes a sliding limit on the spherical chute. The spherical slider 14 in 131 is provided with a first threaded hole in the spherical slider 14 that is adapted to the support bolt 12; wherein, the end of the support bolt 12 away from the lower backing plate 11 passes through the first threaded hole and the spherical slider. 14 is connected, and the support bolt 12 is movably connected with the upper backing plate 13 through the spherical slider 14 and the spherical sliding groove 131 .

In the actual use process, due to different construction requirements, the corresponding construction angles of the steel strands are different. Adjust the angle and position of the upper backing plate 13 by adjusting the fitting position between the support bolt 12 and the first threaded hole (the specific adjustment process is determined according to the construction requirements, and will not be repeated here), so as to meet the corresponding construction requirements. Require.

Specifically, the nut seat 141 at the upper end of the spherical slider 14 is hexagonal or polygonal. During the actual adjustment process, the hexagonal nut seat 141 can be rotated to make the spherical slider 14 rotate around the support bolt 12, thereby realizing the up and down movement of the upper steel plate.

More specifically, the movable connecting piece further includes a nut seat 141 integrally formed and fixed on the upper end of the spherical slider 14, and a second threaded hole corresponding to the position of the first threaded hole is opened on the nut seat 141; wherein, the nut seat 141 Extending to the outside of the ball chute 131 , the end of the support bolt 12 away from the lower backing plate 11 passes through the first threaded hole and the second threaded hole in sequence and then extends to the upper side of the upper backing plate 13 . By fixing the nut seat 141 extending outside the ball sliding groove 131 at the upper end of the ball sliding block 14, not only the stability of the connection between the support bolt 12 and the ball sliding block 14 can be improved, but also the ball sliding block 14 can be prevented from being trapped in the ball sliding groove. Excessive rotation occurs in 131, so that the first threaded hole corresponding to the position of the support bolt 12 cannot be found when assembling the anchor cable anchor plate.

Preferably, four support bolts 12 are provided between the lower backing plate 11 and the upper backing plate 13 ; and the four supporting bolts 12 are respectively connected to four corners of the lower backing plate 11 and the upper backing plate 13 . This design can further improve the support effect of the support bolts 12, prevent the single support bolt 12 from being overstressed and reduce its service life.

It should be noted that the end of the support bolt 12 away from the upper backing plate 13 is fixedly connected to the lower backing plate 11 . Only in this way can the stability of the entire anchor cable anchor backing plate be ensured. Specifically, the supporting bolt 12 is kept away from the upper backing plate 13 . One end of the lower backing plate 11 can be welded and fixed with the lower backing plate 11 or screwed through the third threaded hole 111. This design can ensure that the lower backing plate 11 is uniformly stressed, so as to reduce stress concentration and shear deformation, resulting in the lower backing plate. 11 boards destroyed.

In addition, it should be noted that the cross-sections of the lower backing plate 11 and the upper backing plate 13 may be circular structures and/or polygonal structures or other structures, as long as the corresponding support effects are satisfied in actual use.

In addition, in order to improve the support strength of the upper backing plate 13 and the lower backing plate 11 , the upper backing plate 13 and the lower backing plate 11 are both made of high-strength steel. Of course, the four supporting bolts 12 of the anchor cable and anchor plate also need to be high-strength bolts to ensure that the anchor cable and anchor plate can work safely under the action of the huge tension force of the anchor cable, and to avoid the damage of the anchor cable and anchor plate and the occurrence of safety accidents.

It should be noted that the steel strands 15 to be positioned are formed after the anchor cable steel strand bundles 18 are divided into bundles. Therefore, there are generally multiple strands at the same time. In order to realize the simultaneous fixation of these steel strands, the first guide hole 112 At least two second guide holes 132 are formed on the backing plate 11 , and at least two second guide holes 132 are formed on the upper backing plate 13 ; During actual use, each steel strand 15 to be positioned passes through the first guide hole 112 and the second guide hole 132 corresponding to its position to achieve position fixation.

In the actual production process, it can be manufactured by local materials. For example, the upper backing plate 13 and the lower backing plate 11 are made of Q235 high-strength steel, wherein the size of the upper steel plate is 200*200*40mm, and the size of the lower steel plate is 250 mm. *250*30mm; Support bolt 12 adopts M20 high-strength bolts, and the bolt length is 150mm. The threads on the support bolt 12 are generally set as external threads 121, and the threads of the first threaded hole, the second threaded hole and the third threaded hole 111 are generally set as internal threads.

On the other hand, in order to realize the fixing of the anchor cable through the anchor cable and anchor plate provided by the present invention, the present invention also provides an anchor cable construction method, and FIG. 5 shows the flow of the anchor cable construction method according to an embodiment of the present invention. , using the anchor cable anchor plate as mentioned above to carry out the anchor cable construction, and the specific construction methods include:

S110: opening an anchor cable hole at a preset position of the foundation pit rock 19 and cleaning the anchor cable hole;

S120: The steel strand bundles 18 at the ends of the anchor cables are passed through the anchor cable holes and then subjected to a splitting process to form at least two steel strands 15 to be positioned;

S130: Install the anchor cable anchor plate at the end of the anchor cable and adjust the position of the anchor cable anchor plate, so that the steel strands 15 to be positioned pass through the first guide hole 112 and the second guide hole 132 in sequence and then connect with the upper cushion plate. The plates 13 are perpendicular to each other;

S140: Install the anchor clips 16 to clamp and fix the steel strands 15 to be positioned;

S150: Sealing the anchor cable hole to realize the fixed connection between the end of the anchor cable and the foundation pit rock 19; wherein, in the hole sealing process, grouting the anchor cable hole, and after the edge of the cement slurry reaches the preset scale, Tensioning the anchor cable causes the anchor clip 16 and the anchor cable anchor plate to be stressed. After reaching the preset tension, the tension is stopped. After the cement slurry solidifies, the fixed connection between the end of the anchor cable and the foundation pit rock 19 can be realized. It should be emphasized that the length of the exposed steel strand should not be cut off first, and it should be reserved for the subsequent withdrawal of the anchor.

In addition, in order to improve the support stability of the lower backing plate 11, a supporting ring beam 17 is fixed on the side of the foundation pit rock 19 close to the anchor cable and anchoring plate; The beam 17 is extruded and fixed. Grout the anchor cable hole. After the edge of the cement slurry reaches the scale, tension the anchor cable to make the anchor and anchor plate stress. After reaching the design paper tension, stop tensioning. Do not cut off the working length of the exposed steel strand and keep it. Subsequent use of anchor withdrawal.

It should be noted that, for some temporary anchor cables, after the construction of the water-stop curtain supported by the deep foundation pit is completed, the adjustable structure of the anchor cable and anchor plate provided by the present invention can be used (the steel strands can be realized by rotating the support bolts 12). Looseness of the wire) to recover the parts of the anchor and the anchor plate for future use, so as to reduce the construction cost and save resources. The specific anchor withdrawal process is as follows: after the completion of the project in the deep foundation pit, use the exposed steel strands of the jack to tension the anchor cable to withdraw the anchor, remove the anchor clip 16 and the anchor pad for recycling, so as to reduce the construction cost.

In addition, since the cable anchor plate provided by the present invention has a spatial structure (the upper plate 13, the lower plate 11 and the supporting bolts 12 in between), for the permanent engineering anchor cable, after the steel strand tensioning is completed, it can be The anchoring treatment of the anchor cable and anchor pad with concrete can permanently protect the anchor cable, anchor pad and anchor, and prevent them from being corroded and damaged and the tensile force of the steel strand will fail.

As described above with reference to FIGS. 1 to 5 , the anchor cable anchor pad and the anchor cable construction method according to the present invention are described by way of example. However, those skilled in the art should understand that various improvements can also be made to the anchor cable anchor pad and the anchor cable construction method provided by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the contents of the appended claims.

Claims (10)

1. An anchor rope and anchor backing plate is characterized by comprising an upper backing plate, a lower backing plate and a support bolt arranged between the upper backing plate and the lower backing plate; wherein,

the upper backing plate is provided with a movable connecting piece matched with the supporting bolt, one end of the supporting bolt is fixedly connected with the lower backing plate, and the other end of the supporting bolt is movably connected with the upper backing plate through the movable connecting piece; and,

the steel strand positioning device comprises a lower base plate, an upper base plate and a steel strand to be positioned, wherein the lower base plate is provided with a first guide hole, the upper base plate is provided with a second guide hole corresponding to the first guide hole, and the steel strand to be positioned sequentially passes through the first guide hole and the second guide hole and is connected with an anchorage device clamping piece above the upper base plate.

2. The anchor cable pad of claim 1,

a spherical sliding groove is formed in the upper base plate, the movable connecting piece comprises a spherical sliding block which is limited in the spherical sliding groove in a sliding mode, and a first threaded hole matched with the supporting bolt is formed in the spherical sliding block; wherein,

one end, far away from the lower base plate, of the support bolt is connected with the spherical sliding block through the first threaded hole, and the support bolt is matched with the spherical sliding groove and movably connected with the upper base plate through the spherical sliding block.

3. The anchor cable pad of claim 2,

the movable connecting piece also comprises a nut seat which is integrally fixed at the upper end of the spherical sliding block, and a second threaded hole corresponding to the first threaded hole is formed in the nut seat; wherein,

the nut seat extends to the outside of the spherical sliding groove, and one end, far away from the lower base plate, of the support bolt sequentially passes through the first threaded hole and the second threaded hole and then extends to the position above the upper base plate.

4. The anchor cable pad of claim 3,

four support bolts are arranged between the lower base plate and the upper base plate; and,

the four supporting bolts are respectively connected with the four corner positions of the lower cushion plate and the upper cushion plate.

5. The anchor cable pad of claim 4,

and one end of the support bolt, which is far away from the upper backing plate, is welded and fixed with the lower backing plate or is fixed through threads.

6. The anchor cable pad of claim 5,

the cross sections of the lower backing plate and the upper backing plate are of circular structures and/or polygonal structures.

7. The anchor cable pad of claim 6,

the upper backing plate and the lower backing plate are both made of high-strength steel.

8. The anchor cable pad of claim 7,

the first guide holes are formed in the lower base plate in at least two, and the second guide holes are formed in the upper base plate in at least two; and,

the upper and lower positions of each first guide hole correspond to those of each second guide hole.

9. A method of constructing a cable using the cable tie plate of any one of claims 1 to 8, the method comprising:

forming anchor cable holes at a preset position of the foundation pit rock and cleaning the anchor cable holes;

enabling the steel strand bundle at the end part of the anchor cable to pass through the anchor cable hole and then performing beam splitting treatment to form at least two steel strands to be positioned;

installing an anchor cable and anchor backing plate at the end part of the anchor cable and adjusting the position of the anchor cable and anchor backing plate so that each steel strand to be positioned is mutually vertical to the upper backing plate after passing through the first guide hole and the second guide hole in sequence;

mounting an anchorage device clamping piece to clamp and fix each steel strand to be positioned;

and hole sealing treatment is carried out on the anchor cable holes so as to realize the fixed connection of the end parts of the anchor cables and the foundation pit rocks.

10. A cable bolt working method as defined in claim 9,

a supporting ring beam is fixed on one side of the foundation pit rock close to the anchor rope and anchor backing plate; and,

and after the anchor rope and anchor backing plate is installed, the lower backing plate and the support ring beam are extruded and fixed.

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