Positioning support for staged assembly of suspension bridge anchoring system and construction method of positioning support

Abstract

The invention relates to the technical field of bridge engineering construction, and particularly discloses a positioning support for staged assembly of a suspension bridge anchoring system and a construction method of the positioning support. The rear support and the middle support are fixedly installed on the fourth layer of anchorage concrete and connected into a whole through the rear connecting rod. The top end of the front bracket is connected with the top end of the middle bracket through a front connecting rod; a short supporting column; short supporting columns are distributed on the inclined faces of the same sides of the rear support, the middle support and the front support in an array mode, and the short supporting columns are sequentially increased along concrete pouring of each layer of anchorage. A double-arm beam; a plurality of double-arm beams are transversely and evenly distributed on the short supporting columns, the double-arm beams and the short supporting columns form a grid shape, and fixing devices are further arranged on the double-arm beams. Pre-stressed pipes; the fixing device and the double-arm beam are locked and fixed, so that the problem that the positioning precision of the prestressed pipeline is poor due to the fact that the front support is too high and is poor in stability, small in rigidity and prone to deformation is solved, and the construction period is greatly shortened.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering construction, in particular to a positioning bracket for assembling a suspension bridge anchoring system in stages and a construction method thereof. Background Art

[0002] In the construction of suspension bridges, the positioning brackets used for the installation of the anchoring system are usually erected at one time. In particular, the erection of the front bracket requires first casting a step in the anchor that is much higher than the foundations of the rear and middle brackets. This step is originally part of the anchor, so it is equivalent to adding several layers of layered casting time to the construction period. If the step is not set, the columns of the front bracket must be tall and strong to meet the deformation requirements, and this method is even less adopted.

[0003] The object of the present invention is to provide a positioning bracket for assembling a suspension bridge anchoring system in stages, so as to solve the problems mentioned in the above background technology. Summary of the invention

[0004] To achieve the above-mentioned purpose, the present invention provides a positioning bracket for a suspension bridge anchoring system assembled in stages, comprising a rear bracket, a middle bracket and a rear connecting rod; the rear bracket and the middle bracket are both fixedly installed on the top surface of the fourth layer of anchor concrete and are arranged parallel to each other, the rear connecting rod is fixedly installed between the rear bracket and the middle bracket, and the rear connecting rod and the middle bracket form a triangle;

[0005] Front bracket; the front bracket is fixedly mounted on the top surface of the seventh-layer anchor concrete, and the top end of the middle bracket is connected to the top end of the front bracket through a front connecting rod;

[0006] Short support columns; the short support columns are arranged in an array on the inclined surfaces on the same side of the rear support, the middle support and the front support, and the short support columns are added in sequence along the pouring of each layer of anchor concrete;

[0007] Double-bearing beams; a plurality of the double-bearing beams are evenly distributed laterally on the plurality of the short support columns, the double-bearing beams and the short support columns form a grid, and the double-bearing beams are also provided with a fixer;

[0008] Prestressed pipes; the prestressed pipes are evenly distributed in the grid formed by the double beams and the short support columns, and are locked and fixed to the double beams by the fixators;

[0009] The fixer includes a clamping screw, a small shoulder beam and a nut. The clamping screw is installed on the double shoulder beam. The small shoulder beam is transversely installed on the clamping screw to form a limiting space with the U-shaped groove of the clamping screw. The prestressed pipe is installed in the U-shaped groove. The clamping screw is threadedly connected with a nut. The nut is arranged to fit the outer wall of the small shoulder beam. The small shoulder beam is limited and fixed to the prestressed pipe by the nut.

[0010] As a further improvement of the present invention, the rear bracket, the middle bracket and the front bracket all include vertical rods and inclined rods, and the vertical rods and the inclined rods are arranged parallel to each other, the vertical rods of the rear bracket and the middle bracket are connected to the rear connecting rod, and the rear connecting rod is connected to the top end of the vertical rod of the rear bracket and the two ends of the vertical rod of the middle bracket to form a triangle, and each of the inclined rods is respectively connected to each of the short support columns.

[0011] As a further improvement of the present invention, an oblique brace is installed between the rear connecting rod and the vertical rod of the middle bracket, one end of the oblique brace is fixedly connected to the center of the vertical rod, and the other end is fixedly connected to the angle of the rear connecting rod.

[0012] As a further improvement of the present invention, two ends of the front connecting rod are respectively connected and fixed to the top ends of the vertical rods of the front bracket and the top ends of the vertical rods of the middle bracket.

[0013] As a further improvement of the present invention, the prestressed pipe includes a complete pipe and a segmented pipe. The complete pipe is installed after the seventh layer of anchoring concrete is poured and the segmented pipe is installed. The segmented pipe is installed during the construction process from the fourth layer of anchoring concrete to the seventh layer of anchoring concrete. The segmented pipe includes a first section of a prestressed pipe and a second section of a prestressed pipe. The first section of the prestressed pipe is installed on the double supports on the rear support and the middle branch, and the second section of the prestressed pipe is installed on the double support beam of the front support. The first section of the prestressed pipe, the second section of the prestressed pipe and the complete pipe are all locked and fixed by the fixer on the double support beam.

[0014] As a further improvement of the present invention, the prestressed pipe is installed in the U-shaped groove, and the small load beam is controlled by the nut to lock and fix the first section of the prestressed pipe, the second section of the prestressed pipe and the complete pipe.

[0015] As a further improvement of the present invention, the fastener also includes two clamps, spherical washers and nuts. Conical holes are symmetrically opened on the two clamps. The clamps are connected to the clamping screws through the conical holes. Spherical washers are provided on the clamping screws and are arranged on both sides of the conical holes. The two clamps are clamped on both sides of the double-bearing beam and are locked and fixed by nuts.

[0016] A construction method for a positioning bracket for assembling a suspension bridge anchoring system in stages, comprising the following steps:

[0017] Step 1: First, install the rear bracket and the middle bracket on the fourth layer of anchor concrete, and the two are arranged in parallel, and then install the rear connecting rod between the rear bracket and the middle bracket to form a stable frame;

[0018] Step 2, then install short support columns at the end of each inclined rod of the rear support and the middle support, and then install several double beams on the short support columns;

[0019] Step 3, installing the first section of the prestressed pipe on each double-bearing beam, and locking and fixing the first section of the prestressed pipe to the double-bearing beam through a fixer;

[0020] Step 4: Repeat steps 2 and 3 once;

[0021] Step 5: pouring the fifth to seventh layers of anchor concrete, repeating steps 2 and 3 for each layer of anchor concrete, until the seventh layer of anchor concrete is poured;

[0022] Step 6: Install the front bracket on the seventh layer of anchor concrete, and then install the front connecting rod between the top of the middle bracket and the top of the front bracket to form a stable frame;

[0023] Step 7, then install the short support column and the double beam, then install the second section of the prestressed pipe, lock and fix the second section of the prestressed pipe with the double beam through the fixer, then dock the first section of the prestressed pipe with the second section of the prestressed pipe, and gradually repeat the above steps until all the second sections of the prestressed pipe are installed;

[0024] Step 8, then install short support columns at the end of each inclined rod of the rear support, the middle support, and the front support, and then install a plurality of double beams on the short support columns;

[0025] Step nine, installing a prestressed pipe on each double-bearing beam, and locking and fixing the prestressed pipe to the double-bearing beam by a fixing device;

[0026] Step 10, repeat steps 8 and 9 once;

[0027] Then pour the eighth to tenth layers of anchor concrete, and repeat steps eight to ten for each layer of anchor concrete until all prestressed pipes are installed.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention adopts a staged installation for the positioning bracket of the suspension bridge anchoring system. First, the rear bracket and the middle bracket are installed on the 4th layer of anchoring concrete, and then the first anchor rod of the 1st section of the prestressed pipe is installed; after the 7th layer of anchoring concrete is poured, the front bracket is installed and the two sections of the bracket are connected, and the second anchor rod of the 2nd section of the prestressed pipe is installed at the same time. This scheme avoids the front bracket from being erected too high, solves the problems of poor stability, low rigidity and easy deformation, and poor positioning accuracy of the prestressed pipe, and greatly reduces the material consumption of the front bracket. Compared with the conventional construction scheme that requires additional pouring of high steps for installing the front bracket, this scheme eliminates the work of supporting formwork, pouring concrete, roughening, etc., and effectively shortens the construction period.

[0030] 2. In the present invention, since most prestressed pipes have a spatial angle with the double-beam, and the clamp needs to be installed vertically with the prestressed pipe, the fixture needs to have multi-directional adjustment capabilities. The upper part of the clamp screw of the fixture clamps the prestressed pipe with the small beam and the nut, and the lower part clamps the upper and lower edges of the double beam through the clamp with a tapered hole, a spherical washer and a nut. The spherical washer is used to adjust the angle between the clamp screw and the clamp. A common solution is to use a small steel frame for fixing. When measuring and positioning, it is difficult for the hoisting equipment to fine-tune the position of the prestressed pipe, and welding is required after adjustment, which is time-consuming and labor-intensive. The present fixture does not require welding. The prestressed pipe is placed in an approximate position, and the clamp can be slightly rotated and translated by hammering. The height can be accurately adjusted by tightening the nut. After positioning, the installation can be completed by tightening the nut. The process is easy, fast and material-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the positioning bracket of the present invention;

[0032] Figure 2 It is a schematic diagram of the rear support and the middle support of the present invention being installed on the fourth-layer anchor concrete;

[0033] Figure 3 It is a schematic diagram of the installation of the first anchor rod in the prestressed pipe of the present invention;

[0034] Figure 4 This is a schematic diagram of pouring the fifth layer of anchor concrete according to the present invention;

[0035] Figure 5 This is a schematic diagram of the installation of the front bracket of the present invention;

[0036] Figure 6 It is a schematic diagram of the installation of the second anchor rod in the prestressed pipe of the present invention;

[0037] Figure 7 This is a schematic diagram of the installation of the 6th and 7th layers of prestressed pipes of the present invention;

[0038] Figure 8 This is a schematic diagram of pouring the eighth layer of anchor concrete according to the present invention;

[0039] Fig. 9 This is a schematic diagram of the prestressed pipe of the present invention after installation;

[0040] Fig.10 It is a schematic diagram of the structure of the fixer of the present invention.

[0041] In the figure: 1. rear bracket; 2. middle bracket; 3. rear connecting rod; 4. front bracket; 5. front connecting rod; 6. short support column; 7. double beam; 8. fixer; 801. clamp screw; 802. small beam; 803. clamp; 804. spherical washer; 805. nut; 9. prestressed pipe; 91. first section of prestressed pipe; 92. second section of prestressed pipe; 10. fourth layer anchor concrete; 11. seventh layer anchor concrete. DETAILED DESCRIPTION

[0042] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0045] Embodiment 1:

[0046] See also Figure 1-10 The present invention provides a positioning bracket for a suspension bridge anchoring system assembled in stages, comprising a rear bracket 1, a middle bracket 2 and a rear connecting rod 3; the rear bracket 1 and the middle bracket 2 are both fixedly installed on the top surface of the fourth layer of anchor concrete 10, and are arranged parallel to each other, the rear connecting rod 3 is fixedly installed between the rear bracket 1 and the middle bracket 2, and the rear connecting rod 3 and the middle bracket 2 form a triangle;

[0047] The front bracket 4 is fixedly mounted on the top surface of the seventh-layer anchor concrete 11, and the top of the middle bracket 2 is connected to the top of the front bracket 4 through a front connecting rod 5;

[0048] Short support columns 6; the short support columns 6 are arranged in an array on the inclined surfaces on the same side of the rear support 1, the middle support 2 and the front support 4, and the short support columns 6 are added in sequence along the pouring of each layer of anchor concrete 10;

[0049] Double beam 7; a plurality of the short support columns 6 are evenly distributed laterally with a plurality of the double beams 7, the double beams 7 and the short support columns 6 forming a grid, the double beams 7 are also provided with a fixer 8;

[0050] Prestressed pipe 9; the prestressed pipe 9 is evenly distributed in the grid formed by the double beam 7 and the short support column 6, and is locked and fixed to the double beam 7 by the fixer 8;

[0051] The fixer 8 includes a clamping screw 801, a small shoulder beam 802 and a nut. The clamping screw 801 is installed on the double shoulder beam 7. The small shoulder beam 802 is transversely installed on the clamping screw 801 to form a limiting space with the U-shaped groove of the clamping screw 801. The prestressed pipe 9 is installed in the U-shaped groove. The clamping screw 801 is threadedly connected with a nut. The nut is arranged to fit the outer wall of the small shoulder beam 802. The small shoulder beam is limited and fixed to the prestressed pipe 9 by the nut.

[0052] The rear bracket 1, the middle bracket 2 and the front bracket 4 all include vertical rods and inclined rods, and the vertical rods and the inclined rods are arranged parallel to each other. The vertical rods of the rear bracket 1 and the middle bracket 2 are connected to the rear connecting rod 3. The rear connecting rod 3 is connected to the top of the vertical rod of the rear bracket 1 and the two ends of the vertical rod of the middle bracket 2 to form a triangle. Each of the inclined rods is connected to each of the short support columns 6 one by one.

[0053] An oblique brace is also installed between the rear connecting rod 3 and the vertical rod of the middle bracket 2, one end of the oblique brace is fixedly connected to the center of the vertical rod, and the other end is fixedly connected to the angle of the rear connecting rod 3.

[0054] The two ends of the front connecting rod 5 are respectively connected and fixed to the top ends of the vertical rods of the front bracket 4 and the top ends of the vertical rods of the middle bracket 2 .

[0055] The prestressed pipe 9 includes a complete pipe and a segmented pipe. The complete pipe is installed after the seventh layer of anchoring concrete is poured and the segmented pipe is installed. The segmented pipe is installed during the construction process from the fourth layer of anchoring concrete to the seventh layer of anchoring concrete. The segmented pipe includes a first section 91 of a prestressed pipe and a second section 92 of a prestressed pipe. The first section 91 of the prestressed pipe is installed on the double-bearing beam 7 on the rear support 1 and the middle support 2, and the second section 92 of the prestressed pipe is installed on the double-bearing beam 7 of the front support. The first section 91 of the prestressed pipe, the second section 92 of the prestressed pipe and the complete pipe are all locked and fixed by the fixer 8 on the double-bearing beam 7.

[0056] The first section 91 of the prestressed pipe, the second section 92 of the prestressed pipe and the complete pipe are installed in the U-shaped groove, and the small load beam 802 is controlled by the nut to lock and fix the first section 91 of the prestressed pipe, the second section 92 of the prestressed pipe and the complete pipe.

[0057] During construction, first accurately install the rear support 1 and the middle support 2 on the fourth layer of anchor concrete 10, install the rear connecting rod 3 to form a stable triangular support structure, install short support columns 6 at the ends of the inclined rods of the rear support 1 and the middle support 2, and install double beams 7 on the short support columns 6. The double beams 7 are made of steel beams of appropriate specifications to ensure that their strength can support the subsequent installation of prestressed pipes 9. Place two fixtures 8 at the corresponding positions of the first section 91 of the prestressed pipe, and tighten the nuts under the small beams 802 to lock the two fixtures 8 in the first section 91 of the prestressed pipe. On a section 91, the prestressed pipe equipped with the fixture 8 is placed on the double-bearing beam 7. At this time, the fixture 8 is only installed with a clamping plate 803 and a nut 805 on the upper edge of the double-bearing beam 7. After precise positioning, the clamping plate 803 is installed on the lower edge of the double-bearing beam 7, and the nut 805 under the clamping plate 803 is tightened to complete the installation of the first section 91 of the prestressed pipe. Repeat the above steps to complete the installation of the first section 91 of the 2-layer prestressed pipe. With the layered pouring of the fifth to seventh layers of anchor concrete 11, the above installation steps are strictly repeated for each layer. After the seventh layer of anchor concrete 11 is poured, After the installation of the second section 92 of the prestressed pipe, the eighth to tenth layers of anchor concrete are poured in layers. Each time a layer is poured, the installation steps of the first section 91 of the prestressed pipe are strictly repeated to complete the installation of all non-segmented prestressed pipes 9. The entire construction process is smooth, and the positioning bracket effectively ensures the stability of the anchor. The installation accuracy of the anchoring system. In this embodiment, the positioning bracket of the suspension bridge anchoring system is installed in stages. First, the rear bracket 1 and the middle bracket 2 are installed on the 4th layer of anchoring concrete 10, and then the first section 91 of the prestressed pipe is installed; after the 7th layer of anchoring concrete 10 is poured, the front bracket 4 is installed and connected to the previous bracket, and then the second section 92 of all prestressed pipes and the complete pipe are installed. This solution avoids the front bracket 4 from being erected too high, solves the problems of poor stability, low rigidity and easy deformation, and poor positioning accuracy of the prestressed pipe 9, and greatly reduces the material consumption of the front bracket 4. Compared with the conventional construction plan that requires additional high steps to be poured for the installation of the front bracket 4, this solution eliminates the work of supporting formwork, pouring concrete, and roughening, effectively shortening the construction period.

[0058] Embodiment 2:

[0059] See also Figure 1 , Fig.10 The fixer 8 includes a clamping screw 801, a small shoulder beam 802 and a nut. The clamping screw 801 is installed on the double shoulder beam 7. The small shoulder beam 802 is horizontally installed on the clamping screw 801 to form a limiting space with the U-shaped groove of the clamping screw 801. The clamping screw 801 is threadedly connected with a nut, and the nut is arranged to fit the outer wall of the small shoulder beam 802. The first anchor rod or the second anchor rod is inserted into the U-shaped groove. The small shoulder beam 802 is controlled by the nut to lock and fix the first anchor rod or the second anchor rod.

[0060] The fixer 8 also includes two clamps 803, a spherical washer 804 and a nut. The two clamps 803 are symmetrically provided with tapered holes. The clamps 803 are connected to the clamping screw 801 through the tapered holes. The clamping screw 801 is provided with a spherical washer 804 and is arranged on both sides of the tapered hole. The two clamps 803 are clamped on both sides of the double-bearing beam 7 and are locked and fixed by nuts.

[0061] When in use, the prestressed pipe 9 (the first section 91 of the prestressed pipe and the second section 92 of the prestressed pipe) is placed in the U-shaped groove of the clamp screw 801, and then the two nuts on the clamp screw 801 are tightened to lock the small beam 802 to the prestressed pipe 9. Since the two clamps 803 clamp the two sides of the double-bearing beam 7, the sliding clamp 803 can be slightly rotated and translated on the double-bearing beam 7 by hammering with a hammer. The height of the prestressed pipe 9 can be accurately adjusted by screwing the nut on the clamp screw 801 that fits with the clamp 803. After positioning, tighten the bottom two nuts on the clamp screw 801. The prestressed pipe 9 of different spatial angles can be fixed on the double-bearing beam 7 by a nut 805. In this embodiment, the angle of the clamp screw 801 and the clamp plate 803 can be adjusted by using a spherical washer 804. The common solution is to use a small steel frame for fixing. When measuring and positioning, it is difficult for the lifting equipment to fine-tune the position of the prestressed pipe 9, and welding is required after adjustment, which is time-consuming and labor-intensive. The fixer 8 does not require welding. The prestressed pipe 9 is placed in the approximate position. The clamp plate 803 can be slightly rotated and translated by hammering. The height can be accurately adjusted by tightening the nut. After positioning, the installation can be completed by tightening the nut. The process is easy, fast and saves materials.

[0062] A construction method for a positioning bracket for assembling a suspension bridge anchoring system in stages, comprising the following steps:

[0063] Step 1: First, install the rear support 1 and the middle support 2 on the fourth layer of anchor concrete 10, and the two are arranged in parallel, and then install the rear connecting rod 3 between the rear support 1 and the middle support 2 to form a stable frame;

[0064] Step 2, then install a short support column 6 at the end of each inclined rod of the rear support 1 and the middle support 2, and then install a plurality of double beams 7 on the short support column 6;

[0065] Step 3: Install the first section 91 of the prestressed pipe on each double-bearing beam 7, and lock and fix the first section 91 of the prestressed pipe to the double-bearing beam 7 through the fixing device 8;

[0066] Step 4: Repeat steps 2 and 3 once;

[0067] Step 5: pouring the fifth to seventh layers of anchor concrete 11, and repeating steps 2 and 3 for each layer of anchor concrete, until the seventh layer of anchor concrete 11 is poured;

[0068] Step 6: Install the front bracket 4 on the seventh layer of anchor concrete 11, and then install the front connecting rod 5 between the top of the middle bracket 2 and the top of the front bracket 4 to form a stable frame;

[0069] Step 7, then install the short support column 6 and the double-bearing beam 7, then install the second section 92 of the prestressed pipe, lock and fix the second section 92 of the prestressed pipe with the double-bearing beam 7 through the fixer 8, then dock the first section 91 of the prestressed pipe with the second section 92 of the prestressed pipe, and gradually repeat the above steps until all the second sections 92 of the prestressed pipe are installed;

[0070] Step 8, then install a short support column 6 at the end of each inclined rod of the rear support 1, the middle support 2, and the front support 4, and then install a plurality of double beams 7 on the short support column 6;

[0071] Step nine, installing a prestressed pipe 9 on each double-bearing beam 7, and locking and fixing the prestressed pipe 9 and the double-bearing beam 7 with a fixer 8;

[0072] Step 10, repeat steps 8 and 9 once;

[0073] Then, the eighth to tenth layers of anchor concrete are poured, and steps eight to ten are repeated for each layer of anchor concrete poured until all prestressed pipes 9 are installed.

[0074] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A positioning bracket for assembling a suspension bridge anchoring system in stages, characterized in that: The invention comprises a rear support (1), a middle support (2) and a rear connecting rod (3); the rear support (1) and the middle support (2) are both fixedly mounted on the top surface of the fourth layer of anchor concrete (10) and are arranged parallel to each other; the rear connecting rod (3) is fixedly mounted between the rear support (1) and the middle support (2); the rear connecting rod (3) and the middle support (2) form a triangle; The front bracket (4) is fixedly mounted on the top surface of the seventh layer of anchor concrete (11), and the top end of the middle bracket (2) is connected to the top end of the front bracket (4) via a front connecting rod (5); Short support columns (6); the short support columns (6) are arranged in an array on the inclined surfaces on the same side of the rear support (1), the middle support (2) and the front support (4), and the short support columns (6) are added in sequence along the pouring of each layer of anchor concrete (10); Double-bearing beams (7); a plurality of the double-bearing beams (7) are evenly distributed laterally on the plurality of the short support columns (6), a grid is formed between the double-bearing beams (7) and the short support columns (6), and a fixer (8) is provided on the double-bearing beams (7); Prestressed pipe (9); the prestressed pipe (9) is evenly distributed in the grid formed by the double-bearing beam (7) and the short support column (6), and is locked and fixed to the double-bearing beam (7) by the fixer (8); The fixer (8) comprises a clamping screw (801), a small shoulder beam (802) and a nut. The clamping screw (801) is mounted on the double shoulder beam (7). The small shoulder beam (802) is transversely mounted on the clamping screw (801) to form a limiting space with the U-shaped groove of the clamping screw (801). The prestressed pipe (9) is installed in the U-shaped groove. The clamping screw (801) is threadedly connected with a nut. The nut is arranged to fit the outer wall of the small shoulder beam (802). The small shoulder beam (802) is limited and fixed to the prestressed pipe (9) by the nut.

2. The positioning bracket for assembling the anchoring system of a suspension bridge in stages according to claim 1, characterized in that: The rear bracket (1), the middle bracket (2) and the front bracket (4) all include vertical rods and inclined rods, and the vertical rods and the inclined rods are arranged parallel to each other. The vertical rods of the rear bracket (1) and the middle bracket (2) are connected to the rear connecting rod (3), and the rear connecting rod (3) is connected to the top of the vertical rod of the rear bracket (1) and the two ends of the vertical rod of the middle bracket (2) to form a triangle, and each of the inclined rods is connected to each of the short support columns (6) one by one.

3. The positioning bracket for assembling the anchoring system of a suspension bridge in stages according to claim 2, characterized in that: An oblique brace is also installed between the rear connecting rod (3) and the vertical rod of the middle bracket (2), one end of the oblique brace is fixedly connected to the center of the vertical rod, and the other end is fixedly connected to the angle of the rear connecting rod (3).

4. The positioning bracket for assembling the anchoring system of a suspension bridge in stages according to claim 2, characterized in that: The two ends of the front connecting rod (5) are respectively connected and fixed to the top of the vertical rod of the front bracket (4) and the top of the vertical rod of the middle bracket (2).

5. The positioning bracket for assembling the anchoring system of a suspension bridge in stages according to claim 1, characterized in that: The prestressed pipe (9) comprises a complete pipe and a segmented pipe. The complete pipe is installed after the seventh layer of anchoring concrete is poured and the segmented pipe is installed. The segmented pipe is installed during the construction process from the fourth layer of anchoring concrete to the seventh layer of anchoring concrete. The segmented pipe comprises a first section (91) of a prestressed pipe and a second section (92) of a prestressed pipe. The first section (91) of the prestressed pipe is installed on the double beam (7) on the rear support (1) and the middle support (2). The second section (92) of the prestressed pipe is installed on the double beam (7) of the front support. The first section (91) of the prestressed pipe, the second section (92) of the prestressed pipe and the complete pipe are all locked and fixed by the fixer (8) on the double beam (7).

6. The positioning bracket for assembling the anchoring system of a suspension bridge in stages according to claim 5, characterized in that: The prestressed pipe (9) is installed in the U-shaped groove, and the small load beam (802) is controlled by the nut to lock and fix the first section (91) of the prestressed pipe, the second section (92) of the prestressed pipe and the complete pipe.

7. The positioning bracket for assembling the anchoring system of a suspension bridge in stages according to claim 1, characterized in that: The fixer (8) further comprises two clamping plates (803), a spherical washer (804) and a nut (805). The two clamping plates (803) are symmetrically provided with tapered holes. The clamping plates (803) are connected to the clamping screw (801) via the tapered holes. The clamping screw (801) is provided with a spherical washer (804) which is arranged on both sides of the tapered holes. The two clamping plates (803) are clamped on both sides of the double-bearing beam (7) and are locked and fixed by nuts (805).

8. A method for constructing a positioning bracket for assembling a suspension bridge anchoring system in stages, characterized in that: The method comprises the following steps: Step 1, firstly installing a rear support (1) and a middle support (2) on the fourth layer of anchor concrete (10), and the two are arranged in parallel, and then installing a rear connecting rod (3) between the rear support (1) and the middle support (2) to form a stable frame; Step 2, then install a short support column (6) at the end of each inclined rod of the rear support (1) and the middle support (2), and then install a plurality of double beams (7) on the short support column (6); Step three, installing the first section (91) of the prestressed pipe on each double-bearing beam (7), and locking and fixing the first section (91) of the prestressed pipe to the double-bearing beam (7) by a fixer (8); Step 4: Repeat steps 2 and 3 once; Step 5, then pouring the fifth to seventh layers of anchor concrete (11), repeating steps 2 and 3 for each layer of anchor concrete, until the seventh layer of anchor concrete (11) is poured; Step 6: Install the front bracket (4), install the front bracket (4) on the seventh layer of anchor concrete (11), and then install the front connecting rod (5) between the top of the middle bracket (2) and the top of the front bracket (4) to form a stable frame; Step seven, then install the short support column (6) and the double-bearing beam (7), then install the second section (92) of the prestressed pipe, lock and fix the second section (92) of the prestressed pipe with the double-bearing beam (7) through the fixer (8), then connect the first section (91) of the prestressed pipe with the second section (92) of the prestressed pipe, and repeat the above steps step by step until all the second sections (92) of the prestressed pipe are installed. Step 8, then install a short support column (6) at the end of each inclined rod of the rear support (1), the middle support (2), and the front support (4), and then install a plurality of double beams (7) on the short support column (6); Step nine, installing a prestressed pipe (9) on each double-bearing beam (7), and locking and fixing the prestressed pipe (9) and the double-bearing beam (7) by a fixing device (8); Step 10, repeat steps 8 and 9 once; Then, the eighth to tenth layers of anchor concrete are poured, and steps eight to ten are repeated for each layer of anchor concrete poured until all prestressed pipes (9) are installed.

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