Fixing device for bridge group anchor and construction method

Abstract

The invention relates to a fixing device for bridge group anchors and a construction method, the fixing device for bridge group anchors comprises a plurality of steel strands and anchor bearing plates, and further comprises a mounting frame, the mounting frame comprises a back plate and a plurality of partition plates, the partition plates are fixedly mounted on the back face of the back plate, the partition plates divide the back plate into a plurality of compartments, and round holes are formed in the portions, in the middles of the compartments, of the back plate; and the anchor boxes are fixedly installed in the compartments, and installation parts of the anchor boxes penetrate through the round holes, are located on the front face of the back plate and are suitable for steel strands to penetrate through. According to the fixing device, an installation pipe is fixedly installed on a fixing plate, a steel strand penetrates through the installation pipe, and a pipeline installation hole is formed in an installation part of an anchor box and used for installing the installation pipe in a penetrating mode; the angle of the anchor box is adjusted and fixed when the anchor box is mounted, then the mounting pipe and the steel strand are positioned and fixed, the influence on the mounting angle of the steel strand in the subsequent construction process is avoided, the incident angle of the steel strand can be accurately controlled, and firmness and reliability are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and relates to a group anchor of a bridge, in particular to a fixing device and a construction method for the group anchor of a bridge. Background Art

[0002] The prestressed system is an important part of the bridge construction process and has been widely used in domestic bridge construction, which has effectively improved the structural strength, earthquake resistance, bearing capacity, quality and safety of highway bridge projects. In the construction process of the post-tensioned prestressed system, the steel strands are directly fixed on the steel bars of the anchor plate, which are prone to displacement during the concrete pouring process, resulting in large errors in the installation position of the steel strands and poor bridge construction quality. Therefore, the accurate positioning of the steel strand ends and the control of the incident angle of the steel strands are relatively difficult, posing quality risks.

[0003] To this end, we propose a fixing device and a construction method for bridge group anchors to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a fixing device and a construction method for bridge group anchors which are accurate in positioning and easy to install.

[0005] To solve the above problems, the technical solution of the present invention is:

[0006] A fixing device for bridge group anchors, comprising a plurality of steel strands and anchor pads, and further comprising:

[0007] The mounting frame comprises a back plate and a plurality of partition plates, wherein the plurality of partition plates are fixedly mounted on the back of the back plate, the plurality of partition plates divide the back plate into a plurality of compartments, and a circular hole is formed on the back plate located in the middle of the compartment;

[0008] A plurality of anchor boxes are fixedly installed in a plurality of compartments. The installation parts of the anchor boxes pass through the round holes and are located on the front side of the back plate, and are suitable for passing the steel strands.

[0009] In a further embodiment, a fixing plate is clamped between the mounting frame and the anchor plate, and the mounting frame is fixedly mounted on the fixing plate through a mounting portion of the anchor box.

[0010] In a further embodiment, the anchor box is a rectangular structure, the side ends of the anchor box are fixedly mounted on the partition, and a mounting portion is formed in the middle of the anchor box.

[0011] In a further embodiment, the mounting portion is a cylindrical structure, and a grouting hole, a pipeline mounting hole and a plurality of anchor box mounting holes are formed on the outer end surface of the mounting portion.

[0012] In a further embodiment, a plurality of installation grooves are formed at intervals on the front side of the fixing plate, installation tubes are fixed in the installation grooves, and a plurality of steel strands are passed through the installation tubes.

[0013] In a further embodiment, a fixing plate grouting hole is also formed in the installation groove, suitable for grouting into the installation pipe.

[0014] In a further embodiment, the grouting holes of the fixing plate are respectively connected to the grouting holes and the grouting holes of the anchor plate, and the grouting holes of the anchor plate are connected to the installation pipe;

[0015] The two ends of the installation pipe are fixedly installed in the anchor plate and the pipeline installation hole respectively.

[0016] A construction method for a bridge anchor group, installing the bridge anchor group by a fixing device, comprises the following steps:

[0017] Step S101: Assemble the mounting frame and anchor box

[0018] A plurality of anchor boxes are fixedly installed on the mounting frame;

[0019] During installation, the installation angle of the anchor box is adjusted, which is suitable for adjusting the installation angle of the steel strand;

[0020] Step S103: Connect the mounting frame and the fixing plate

[0021] The installation part of the anchor box is fixedly mounted on the fixing plate, and the anchor pad is constructed;

[0022] Step S105: Disassemble the anchor box

[0023] After the construction is completed, several anchor boxes are removed using a disassembly device.

[0024] In a further embodiment, in step S105 of disassembling the anchor box, the disassembly device includes a connecting plate and a disassembly rod, the disassembly rod is passed through the middle of the connecting plate, a fixing nut is installed at the top end of the disassembly rod, and a pin is fixedly installed at the bottom end of the disassembly rod;

[0025] A plurality of legs are fixedly mounted on the bottom end surface of the connecting plate.

[0026] In a further embodiment, in step S105 of disassembling the anchor box, ear plates are fixedly mounted on both ends of the anchor box;

[0027] Pass the two ends of the pin shaft through the two ear plates respectively, then install the connecting plate on the disassembly rod, and the support legs rest against the partitions around the anchor box. Finally, install the fixing nut on the disassembly rod and continuously rotate and tighten it until the anchor box is separated from the fixing plate.

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

[0029] 1. This fixing device fixes and installs several anchor boxes on the front of the mounting frame. The mounting part of the anchor box protrudes forward and passes through the back plate. The mounting part is fixedly installed with the fixing plate by bolts, and then the mounting frame is fixedly installed on the fixing plate; the fixing plate is fixedly installed with a mounting tube, and the steel strand is passed through the mounting tube. The mounting part of the anchor box is provided with a pipe mounting hole for passing the mounting tube; when installing the anchor box, the angle of the anchor box is adjusted and fixed, and then the mounting tube and the steel strand are positioned and fixed, so as to avoid affecting the installation angle of the steel strand in the subsequent construction process, and can realize precise control of the incident angle of the steel strand, which is firm and reliable.

[0030] 2. This fixing device first removes the anchor box and then removes the template of the anchor pad, which can maximize the appearance quality of the concrete at the anchor box, avoid damage to the edges and corners of the concrete at the anchor box, improve the construction quality of the anchor pad, reduce the probability of rework, and save time and effort; and the anchor box is removed using a removal device, which is less destructive, simple in structure, easy to use, and improves removal efficiency.

[0031] 3. This fixing device reduces the volume of the tensioning groove of the anchor plate and the conflict range of the steel bars at the end of the anchor plate, thereby reducing the operational difficulty of the later anchor concrete construction and improving the construction quality of the anchor concrete; and the anchor box and the mounting frame, as well as the anchor box and the fixing plate are rigidly connected by bolts. Compared with the traditional construction method, it enhances the stability of the entire prestressed system and reduces the disturbance to the prestressed system during the concrete pouring process.

[0032] 4. The mounting frame and anchor box of the fixing device adopt a split design, which has a high degree of modularization, is easy and quick to install and dismantle, shortens the construction period, has low operating difficulty, and has low technical requirements for operators; the components of the mounting frame, anchor box, and removal device are common and easy to obtain, and the production is simple and quick, which is convenient for large-scale promotion and use; and it is easy to classify and store, and can be used repeatedly, reducing material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a side cross-sectional view of a fixing device for a bridge group anchor;

[0034] Figure 2 It is a front view of a mounting frame of a fixing device for bridge group anchors;

[0035] Figure 3 A rear view of a mounting frame for a fixing device for a bridge group anchor;

[0036] Figure 4 It is a front view of a fixing plate of a fixing device for a bridge group anchor;

[0037] Figure 5 A schematic diagram of a disassembly device for a fixing device of a bridge group anchor;

[0038] Figure 6 The present invention is a flow chart of a construction method for bridge group anchors.

[0039] In the figure: 1. mounting frame; 11. connecting hole; 12. connecting bolt; 13. compartment; 14. partition; 15. back plate; 2. anchor box; 21. ear plate; 22. mounting portion; 221. grouting hole; 222. pipe mounting hole; 223. anchor box mounting hole; 3. disassembly device; 31. disassembly rod; 311. pin shaft; 32. support leg; 321. pad; 33. connecting plate; 34. fixing nut; 4. fixing plate; 41. mounting groove; 42. mounting pipe; 43. grouting hole of fixing plate. DETAILED DESCRIPTION

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] Embodiment 1:

[0042] A fixing device for bridge group anchors, such as Figures 1 to 4 As shown, the group anchor includes a plurality of steel strands, and the fixing device includes a mounting frame 1 and a plurality of anchor boxes 2. A fixing plate 4 is clamped between the mounting frame 1 and the anchor pad. A plurality of anchor boxes 2 are fixedly installed at intervals on one side surface of the mounting frame 1. Parts of the anchor boxes 2 pass through the mounting frame 1 and protrude from the other side surface of the mounting frame 1, and are suitable for being fixedly installed on the fixing plate 4 and intruding into the concrete member.

[0043] like Figure 2As shown, the mounting frame 1 includes a back plate 15 and a plurality of partitions 14. The front of the back plate 15 is fixedly mounted with the plurality of partitions 14. The plurality of partitions 14 are arranged vertically and horizontally. The plurality of partitions 14 form a grid structure, and a plurality of compartments 13 are formed on the front of the back plate 15. The anchor boxes 2 are fixedly mounted in the plurality of compartments 13. The plurality of partitions 14 are arranged with a plurality of connection holes 11. The connection bolts 12 are installed in the plurality of connection holes 11, so that the anchor boxes 2 can be fixedly mounted in the compartments 13. The back plate 15 located in the middle of the plurality of compartments 13 is provided with a circular hole for passing the protruding mounting portion 22 of the anchor box 2. Preferably, the plurality of partitions 14 are detachably connected to the back plate 15. The partitions 14 and the back plate 15 are both made of Q235 steel.

[0044] like Figure 2 , Figure 3 As shown, the anchor box 2 is a rectangular structure, and the anchor box 2 is provided with a plurality of connection holes 11 at intervals at least on the two side ends. The plurality of connection holes 11 on the anchor box 2 correspond to the plurality of connection holes 11 on the partition 14, so that the connection holes 11 of the anchor box 2 and the connection holes 11 of the partition 14 can be connected together by connecting bolts 12, and then the anchor box 2 is fixedly installed on the mounting frame 1; ear plates 21 are fixedly installed on the two side ends of the anchor box 2, and circular holes for disassembly are formed on the ear plates 21; a mounting portion 22 is formed in the middle of the anchor box 2, and the mounting portion 22 is a truncated cone structure. 22 is inserted into the circular hole in the middle of the back plate 15, the outer end of the mounting part 22 protrudes from the back of the back plate 15, and the mounting part 22 is fixedly mounted on the fixing plate 4. A pipe mounting hole 222 is formed in the middle of the outer end surface of the mounting part 22 for inserting the mounting pipe 42, and a grouting hole 221 is also formed on the outer end surface of the mounting part 22 for grouting into the mounting pipe 42 to facilitate fixing the steel strand; a plurality of anchor box mounting holes 223 are also formed at intervals on the outer end surface of the mounting part 22, and the anchor box mounting holes 223 are used to insert bolts to fix the anchor box 2 and the fixing plate 4 together.

[0045] like Figure 1 , Figure 4As shown, a plurality of mounting grooves 41 are formed at intervals on the front side of the fixing plate 4. The mounting grooves 41 are truncated cone-shaped structures, and the positions of the plurality of mounting grooves 41 correspond one to one with the plurality of anchor boxes 2. A circular hole is formed in the middle of the mounting groove 41 and a mounting tube 42 is fixedly installed. A plurality of steel strands are passed through the mounting tube 42. The position of the mounting tube 42 corresponds to the position of the pipe mounting hole 222 of the mounting portion 22. One end of the mounting tube 42 is fixedly installed in the pipe mounting hole 222, and the other end of the mounting tube 42 is fixedly installed on the anchor pad, so as to facilitate positioning of the mounting tube 42 through the anchor box 2, and then positioning the incident angle of the steel strand; a fixing plate grouting hole 43 is also formed on the mounting groove 41, and the fixing plate grouting hole 43 is respectively connected with the grouting hole 221 of the anchor box 2 and the grouting hole of the anchor pad, and the grouting hole of the anchor pad is communicated with the mounting tube 42, so as to facilitate grouting into the mounting tube 42, and then fix a plurality of steel strands.

[0046] Embodiment 2:

[0047] A construction method for bridge group anchors, such as Figure 5 , Figure 6 As shown, the following steps are also included:

[0048] Step S101: Assemble the mounting frame 1 and the anchor box 2

[0049] According to the design drawings and the number of steel strands, a number of partitions 14 are fixedly installed on the front of the back plate 15, circular holes are opened in a number of compartments 13 and anchor boxes 2 are embedded. According to the designed incident angle of the steel strands, the installation angle of the anchor box 2, that is, the installation angle of the mounting part 22, is adjusted by connecting bolts 12. After adjustment, tighten the connecting bolts 12 to fix the anchor box 2.

[0050] Step S103: Connect the mounting frame 1 and the fixing plate 4

[0051] The back plate 15 is fixedly mounted on the back of the fixing plate 4, bolts are inserted into the anchor box mounting holes 223 of the mounting portion 22, and nuts are screwed in from the inside of the anchor box 2 to tighten the anchor box 2, so as to fix the anchor box 2 on the fixing plate 4, and then the fixing plate 4 is fixedly mounted on the back of the anchor pad. Preferably, the hexagonal head of the bolt faces the inside of the component.

[0052] After the back plate 15 is fixed, the installation pipe 42 is passed through the pipe installation hole 222 of the anchor box 2, the installation groove 41 of the fixing plate 4, and the anchor pad, and a number of steel strands are passed through the installation pipe 42. Grouting is performed into the installation pipe 42 through the grouting holes 221 of the anchor box 2, the grouting holes 43 of the fixing plate, and the grouting holes of the anchor pad, thereby fixing a number of steel strands, and then constructing other components.

[0053] Step S105: Disassemble anchor box 2

[0054] like Figure 5As shown, after the construction is completed, the outer surface of the mounting portion 22 of the anchor box 2 is fixed to the fixing plate 4 by concrete. Therefore, when dismantling, the bolts connecting the anchor box 2 and the fixing plate 4 are first removed, and the dismantling device 3 is used to separate the anchor box 2 from the fixing plate 4; the dismantling device 3 includes a dismantling rod 31, a plurality of legs 32 and a connecting plate 33. The connecting plate 33 is a circular structure, and a circular hole is formed in the middle part for passing the dismantling rod 31. The top ends of the plurality of legs 32 are fixedly installed at intervals around the bottom end of the connecting plate 33, and the bottom ends of the plurality of legs 32 are fixedly installed with a pad 321; the upper end of the dismantling rod 31 is formed with a thread, and a fixing nut 34 is installed at the thread. The bottom end of the dismantling rod 31 is fixedly installed with a pin shaft 311, which is a cylindrical structure. The length of the pin shaft 311 is greater than the spacing between the ear plates 21 on both sides of the anchor box 2. The diameter of the pin shaft 311 corresponds to the diameter of the circular hole of the ear plate 21, which is suitable for inserting the two ends of the pin shaft 311 into the two ear plates 21 respectively when dismantling. Preferably, the pad 321 is a rubber plate, the disassembly rod 31 is a precision-rolled threaded screw with a diameter of 28 mm, the diameter of the circular hole in the middle of the connecting plate 33 is 30 mm; the length of the pin 311 is 45 cm, and the diameter of the pin 311 is 10 cm.

[0055] When in use, first pass the two ends of the pin shaft 311 through the ear plates 21 on both sides of the anchor box 2 respectively, then install the connecting plate 33 on the disassembly rod 31, and the supporting leg 32 and the pin shaft 311 are located on the same side of the connecting plate 33, so that the bottom end of the supporting leg 32 is against the partition 14 on the side of the anchor box 2, and finally, the gasket and the fixing nut 34 are installed on the disassembly rod 31, and the fixing nut 34 is continuously rotated and tightened until the anchor box 2 is separated from the fixing plate 4; after the anchor box 2 is separated from the fixing plate 4, remove the connecting bolt 12, remove the anchor box 2 from the mounting frame 1, and store the mounting frame 1 and the anchor box 2 separately for next use.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fixing device for bridge anchors, comprising a plurality of steel strands and anchor pads, characterized in that: Also includes: The mounting frame (1) comprises a back plate (15) and a plurality of partition plates (14), wherein the plurality of partition plates (14) are fixedly mounted on the front surface of the back plate (15), the plurality of partition plates (14) divide the back plate (15) into a plurality of compartments (13), and a circular hole is formed on the back plate (15) located in the middle of the compartments (13); A plurality of anchor boxes (2) are fixedly installed in a plurality of the compartments (13); the mounting portion (22) of the anchor box (2) passes through the circular hole and is located on the back side of the back plate (15), and is suitable for installing the steel strand.

2. The fixing device for bridge anchor groups according to claim 1, characterized in that: A fixing plate (4) is clamped between the mounting frame (1) and the anchor pad, and the mounting frame (1) is fixedly mounted on the fixing plate (4) via a mounting portion (22) of the anchor box (2).

3. The fixing device for bridge anchor group according to claim 2, characterized in that: The anchor box (2) is a rectangular structure, the side ends of the anchor box (2) are fixedly mounted on the partition (14), and the mounting portion (22) is formed in the middle of the anchor box (2).

4. The fixing device for bridge anchor groups according to claim 3, characterized in that: The mounting portion (22) is a cylindrical structure, and a grouting hole (221), a pipeline mounting hole (222) and a plurality of anchor box mounting holes (223) are formed on the outer end surface of the mounting portion (22).

5. The fixing device for bridge anchor groups according to claim 4, characterized in that: The front surface of the fixing plate (4) is provided with a plurality of installation grooves (41) at intervals, the installation grooves (41) are fixed with installation pipes (42), and the installation pipes (42) are passed through the installation pipes (42).

6. The fixing device for bridge anchor groups according to claim 5, characterized in that: A fixing plate grouting hole (43) is also formed in the installation groove (41) and is suitable for injecting grout into the installation pipe (42).

7. The fixing device for bridge anchor groups according to claim 6, characterized in that: The fixing plate grouting holes (43) are respectively connected to the grouting holes (221) and the grouting holes of the anchor plate, and the grouting holes of the anchor plate are connected to the installation pipe (42); The two ends of the installation pipe (42) are fixedly installed in the anchor plate and the pipeline installation hole (222) respectively.

8. A construction method for bridge anchor groups, characterized in that: Installing the bridge anchor group by the fixing device according to any one of claims 1 to 7 comprises the following steps: Step S101: Assembling the mounting frame (1) and the anchor box (2) A plurality of anchor boxes (2) are fixedly mounted on the mounting frame (1); During installation, the installation angle of the anchor box (2) is adjusted, which is suitable for adjusting the installation angle of the steel strand; Step S103: Connect the mounting frame (1) and the fixing plate (4) The mounting portion (22) of the anchor box (2) is fixedly mounted on the fixing plate (4) to carry out the anchor pad construction; Step S105: Disassembling the anchor box (2) After the construction is completed, a disassembly device (3) is used to dismantle the plurality of anchor boxes (2).

9. The construction method for bridge anchor groups according to claim 8, characterized in that: In the step S105 of disassembling the anchor box (2), the disassembly device (3) comprises a connecting plate (33) and a disassembly rod (31), the disassembly rod (31) is passed through the middle of the connecting plate (33), a fixing nut (34) is installed at the top end of the disassembly rod (31), and a pin shaft (311) is fixedly installed at the bottom end of the disassembly rod (31); A plurality of supporting legs (32) are fixedly mounted on the bottom end surface of the connecting plate (33).

10. The construction method for bridge anchor groups according to claim 9, characterized in that: In the step S105 of disassembling the anchor box (2), both side ends of the anchor box (2) are fixedly mounted with ear plates (21); The two ends of the pin shaft (311) are respectively passed through the two ear plates (21), and then the connecting plate (33) is installed on the disassembly rod (31), and the supporting legs (32) are pressed against the partition plate (14) on the side of the anchor box (2). Finally, the fixing nut (34) is installed on the disassembly rod (31) and is continuously rotated and tightened until the anchor box (2) is separated from the fixing plate (4).

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