A fixing device for bridge group anchor and a construction method thereof

Abstract

The application relates to a fixing device for bridge group anchors and a construction method, which comprises steel strands and anchor pads, and further comprises a mounting frame comprising a back plate and a plurality of partitions, the back plate is fixedly provided with the plurality of partitions on the back surface, the plurality of partitions divide the back plate into a plurality of compartments, and a round hole is arranged on the back plate located in the middle of the compartments; a plurality of anchor boxes are fixedly arranged in the plurality of compartments, the mounting part of the anchor box penetrates through the round hole and is located on the front surface of the back plate and is suitable for penetrating and arranging the steel strands. The fixing device is provided with a mounting pipe on the fixing plate, the steel strands are arranged in the mounting pipe, the mounting part of the anchor box is provided with a pipe mounting hole for penetrating and arranging the mounting pipe; when the anchor box is installed, the angle of the anchor box is adjusted and fixed, then the mounting pipe and the steel strands are positioned and fixed, the installation angle of the steel strands is prevented from being affected in the subsequent construction process, the incident angle of the steel strands can be accurately controlled, and the fixing device is firm and reliable.

Description

TECHNICAL FIELD

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

[0002] The prestressed system is an important link in the bridge construction process, is widely used in domestic bridge construction, and effectively improves the structural strength, seismic and bearing capacity, quality safety and the like of highway bridge engineering; in the construction process of the post-tensioning prestressed system, the steel strand is directly fixed on the steel bar of the anchor pad plate, and displacement is prone to occur in the concrete pouring process, resulting in large installation position error of the steel strand and poor bridge construction quality, so that the accurate positioning of the end of the steel strand and the control of the incidence angle of the steel strand are difficult, and there are quality risks.

[0003] Therefore, the present application provides a fixing device for a group anchor of a bridge and a construction method to solve the above problems. SUMMARY

[0004] The present application aims to overcome the deficiencies of the prior art, and provides a fixing device for a group anchor of a bridge and a construction method which are accurate in positioning and convenient to install.

[0005] To solve the above problems, the technical scheme of the present application is as follows:

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

[0007] A mounting rack comprising a back plate and a plurality of partitions, the back plate has a plurality of partitions fixedly installed on the back surface, the plurality of partitions divide the back plate into a plurality of compartments, and the back plate in the middle of the compartment is provided with a circular hole;

[0008] A plurality of anchor boxes are fixedly installed in the plurality of compartments, the mounting portion of the anchor box passes through the circular hole and is located on the front surface of the back plate, and is suitable for wearing the steel strand.

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

[0010] In a further embodiment, the anchor box is of a rectangular structure, the side end portions of the anchor box are fixedly installed on the partition, and the middle portion of the anchor box is provided with a mounting portion.

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

[0012] In a further embodiment, a plurality of mounting grooves are formed on the front surface of the fixing plate at intervals, a mounting pipe is fixedly installed in the mounting groove, and a plurality of steel strands are installed in the mounting pipe.

[0013] In further embodiments, the fixing plate grouting hole is further provided in the installation groove, and is suitable for grouting into the installation pipe.

[0014] In further embodiments, the fixing plate grouting hole is respectively communicated with the grouting hole and the grouting hole of the anchor pad, and the grouting hole of the anchor pad is communicated with the installation pipe.

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

[0016] A construction method for bridge group anchors, the bridge group anchors are installed through a fixing device, and the method comprises the following steps:

[0017] Step S101, assembling the installation frame and the anchor box

[0018] A plurality of anchor boxes are fixedly installed on the installation frame.

[0019] During installation, the installation angle of the anchor box is adjusted, and the installation angle of the steel strand is adjusted.

[0020] Step S103, connecting the installation frame and the fixing plate

[0021] The installation part of the anchor box is fixedly installed on the fixing plate, and the anchor pad construction is performed.

[0022] Step S105, disassembling the anchor box

[0023] After the construction is completed, the plurality of anchor boxes are disassembled using a disassembling device.

[0024] In further embodiments, in the step S105 of disassembling the anchor box, the disassembling device comprises a connecting plate and a disassembling rod, the disassembling rod is arranged in the middle part of the connecting plate, a fixing nut is installed at the top end part of the disassembling rod, and a pin shaft is fixedly installed at the bottom end part of the disassembling rod.

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

[0026] In further embodiments, in the step S105 of disassembling the anchor box, the two side end parts of the anchor box are fixedly installed with an ear plate.

[0027] The two ends of the pin shaft are respectively arranged through the two ear plates, the connecting plate is arranged on the disassembling rod, the supporting legs are abutted against the partition plates on the side of the anchor box, and finally the fixing nut is arranged on the disassembling rod and is continuously rotated and tightened until the anchor box is separated from the fixing plate.

[0028] Compared with the prior art, the beneficial effects of the present application are:

[0029] 1. The fixing device is fixed on the front of the mounting frame A plurality of anchor boxes are provided, the mounting part of the anchor box protrudes forward and penetrates through the back plate, the mounting part is fixed on the fixing plate by bolts, and then the mounting frame is fixed on the fixing plate; the fixing plate is fixed with a pipe, the steel strand is installed in the pipe, a pipe installation hole is provided on the mounting part of the anchor box for installing the pipe; when the anchor box is installed, the angle of the anchor box is adjusted and fixed, and then the installation pipe 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 to accurately control the incidence angle of the steel strand, which is firm and reliable.

[0030] 2. The fixing device can maximize the guarantee of the concrete appearance quality at the anchor box, avoid the damage of the concrete corners at the anchor box, improve the construction quality of the anchor pad, reduce the rework probability, save time and effort; and the anchor box is removed by the removing device, which has small damage, simple structure and convenient use, and improves the removing efficiency.

[0031] 3. The fixing device reduces the volume of the anchor pad tensioning slot and the conflict range of the anchor pad end reinforcement, thereby reducing the operation difficulty of the anchor concrete construction in the later stage and improving the construction quality of the anchor concrete; and the anchor box and the mounting frame are rigidly connected by bolts, compared with the traditional construction method, the stability of the entire prestressed system is enhanced, and the disturbance to the prestressed system during concrete pouring is reduced.

[0032] 4. The mounting frame and the anchor box of the fixing device are designed in a split type, have high modularization degree, are convenient to install and remove, shorten the construction period, have low operation difficulty, and have low technical level requirement for the operator; the components of the mounting frame, the anchor box and the removing device are common and easy to obtain, and are simple and fast to manufacture, which is convenient for large-scale popularization and use; and it is convenient for classification and storage, can be repeatedly used, and reduces the material cost. BRIEF DESCRIPTION OF DRAWINGS

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

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

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

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

[0037] Figure 5 It is a schematic view of a removing device of a fixing device for bridge group anchor;

[0038] Figure 6 A flow chart of a construction method for a bridge group anchor.

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

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0041] Example 1:

[0042] A fixing device for a bridge group anchor, as shown in Figures 1 to 4 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. The mounting frame 1 is clamped between the anchor pad plate and the fixing plate 4. A plurality of anchor boxes 2 are fixed on one side surface of the mounting frame 1 at intervals. Part of the anchor box 2 penetrates through the mounting frame 1 and protrudes from the other side surface of the mounting frame 1, is adapted to be fixed on the fixing plate 4, and invades the concrete member.

[0043] As shown in Figure 2As shown, the mounting rack 1 comprises a back plate 15 and a plurality of partition plates 14, a plurality of partition plates 14 are fixedly installed on the front surface of the back plate 15, the plurality of partition plates 14 are vertically arranged and horizontally arranged, the plurality of partition plates 14 form a grid structure, and a plurality of compartments 13 are formed on the front surface of the back plate 15, and a plurality of anchor boxes 2 are fixedly installed in the plurality of compartments 13; a plurality of connecting holes 11 are formed on the plurality of partition plates 14, a plurality of connecting bolts 12 are installed in the plurality of connecting holes 11, and the plurality of anchor boxes 2 can be fixedly installed in the plurality of compartments 13; a plurality of circular holes are formed on the back plate 15 in the middle of the plurality of compartments 13, and are used for penetrating the protruding mounting portion 22 of the anchor box 2. Preferably, the plurality of partition plates 14 and the back plate 15 are detachably connected; the partition plate 14 and the back plate 15 are both made of Q235 steel.

[0044] As shown in Figure 2 , Figure 3 , the anchor box 2 is a rectangular structure, a plurality of connecting holes 11 are formed on at least two side ends of the anchor box 2, the plurality of connecting holes 11 on the anchor box 2 correspond to the plurality of connecting holes 11 on the partition plate 14, so that the connecting holes 11 of the anchor box 2 and the connecting holes 11 of the partition plate 14 can be connected together through the connecting bolts 12, and then the anchor box 2 is fixedly installed on the mounting rack 1; the ear plates 21 are fixedly installed on the two side ends of the anchor box 2, and a circular hole for disassembly is formed on the ear plate 21; the mounting portion 22 is formed on the middle of the anchor box 2, the mounting portion 22 is a circular truncated cone structure, the mounting portion 22 is penetrated into the circular hole in the middle of the back plate 15, the outer end of the mounting portion 22 protrudes from the back surface of the back plate 15, and the mounting portion 22 is fixedly installed on the fixing plate 4, a pipeline installation hole 222 is formed on the middle of the outer end surface of the mounting portion 22, and is used for penetrating the installation pipe 42, a grouting hole 221 is also formed on the outer end surface of the mounting portion 22, and is used for grouting into the installation pipe 42, so as to facilitate the fixation of the steel strand; a plurality of anchor box installation holes 223 are also formed on the outer end surface of the mounting portion 22, and are used for penetrating the bolts to fixedly install the anchor box 2 and the fixing plate 4 together.

[0045] As shown in Figure 1 , Figure 4As shown, a plurality of installation grooves 41 are spaced apart on the front surface of the fixing plate 4, the installation grooves 41 are circular truncated cone structures, and the positions of the plurality of installation grooves 41 correspond to the plurality of anchor boxes 2 one by one, the middle part of the installation groove 41 is provided with a circular hole and is fixedly installed with an installation pipe 42, the installation pipe 42 is provided with a plurality of steel strands, the position of the installation pipe 42 corresponds to the position of the pipeline installation hole 222 of the installation part 22, one end of the installation pipe 42 is fixedly installed in the pipeline installation hole 222, and the other end of the installation pipe 42 is fixedly installed on the anchor pad, so as to facilitate positioning of the installation pipe 42 through the anchor box 2, and then positioning the incident angle of the steel strands; the fixing plate grouting hole 43 is further provided on the installation groove 41, the fixing plate grouting hole 43 is connected with the grouting hole 221 of the anchor box 2 and the grouting hole of the anchor pad respectively, the grouting hole of the anchor pad is communicated with the installation pipe 42, so as to facilitate grouting into the installation pipe 42, and then fixing the plurality of steel strands.

[0046] Embodiment 2

[0047] A construction method for bridge group anchors, as shown in Figure 5 、 Figure 6 The method further comprises the following steps:

[0048] Step S101, assembling the mounting frame 1 and the anchor box 2

[0049] According to the design drawing and the number of steel strands, a plurality of partition plates 14 are fixedly installed on the front surface of the back plate 15, circular holes are formed in the plurality of compartments 13 and the anchor boxes 2 are embedded, and the installation angle of the anchor box 2, i.e. the installation angle of the installation part 22, is adjusted through the connecting bolt 12 according to the designed incident angle of the steel strands. After adjustment, the connecting bolt 12 is tightened to fix the anchor box 2.

[0050] Step S103, connecting the mounting frame 1 and the fixing plate 4

[0051] The back plate 15 is fixedly installed on the back surface of the fixing plate 4, a bolt is threaded through the anchor box installation hole 223 of the installation part 22, and a nut is screwed from the inside of the anchor box 2 to fasten it, so as to fix the anchor box 2 on the fixing plate 4, and then the fixing plate 4 is fixedly installed on the back surface 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 threaded between the pipeline installation hole 222 of the anchor box 2, the installation groove 41 of the fixing plate 4, and the anchor pad, a plurality of steel strands are threaded in the installation pipe 42, and grouting is performed into the installation pipe 42 through the grouting hole 221 of the anchor box 2, the fixing plate grouting hole 43, and the grouting hole of the anchor pad, so as to fix the plurality of steel strands, and then construction of other components is performed.

[0053] Step S105, disassembling the anchor box 2

[0054] As shown in Figure 5As shown, after the construction is completed, the outer surface of the mounting portion 22 of the anchor box 2 is fixed on the fixed plate 4 by the concrete, so when the anchor box 2 is removed, the bolts connecting the anchor box 2 and the fixed plate 4 are first removed, and the anchor box 2 is separated from the fixed plate 4 by using the dismounting device 3; the dismounting device 3 comprises a dismounting rod 31, a plurality of supporting legs 32 and a connecting plate 33, the connecting plate 33 is circular in structure and has a circular hole in the middle for passing the dismounting rod 31, the bottom end of the connecting plate 33 is fixedly installed with the top end of the plurality of supporting legs 32 at intervals around the side, and the bottom end of the plurality of supporting legs 32 is fixedly installed with a pad 321; the upper end of the dismounting rod 31 is provided with a thread, a fixed nut 34 is installed at the thread, the bottom end of the dismounting rod 31 is fixedly installed with a pin shaft 311, the pin shaft 311 is cylindrical in structure, the length of the pin shaft 311 is greater than the distance between the two side ears 21 of the anchor box 2, and the diameter of the pin shaft 311 corresponds to the diameter of the circular hole of the ear plate 21, so that the two ends of the pin shaft 311 are respectively inserted into the two ear plates 21 during dismounting. Preferably, the pad 321 is a rubber plate, the dismounting rod 31 is a finished rolling thread rod with a diameter of 28 mm, and the diameter of the circular hole in the middle of the connecting plate 33 is 30 mm; the length of the pin shaft 311 is 45 cm, and the diameter of the pin shaft 311 is 10 cm.

[0055] In use, the two ends of the pin shaft 311 are respectively inserted through the two side ear plates 21 of the anchor box 2, the connecting plate 33 is then passed on the dismounting rod 31, and the supporting legs 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 abuts against the partition plate 14 on the side of the anchor box 2, finally the gasket and the fixed nut 34 are passed on the dismounting rod 31, the fixed nut 34 is continuously rotated and tightened until the anchor box 2 is separated from the fixed plate 4; after the anchor box 2 is separated from the fixed plate 4, the connecting bolts 12 are removed, the anchor box 2 is taken off from the mounting rack 1, and the mounting rack 1 and the anchor box 2 are respectively stored for next use.

[0056] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A fixing device for a group of bridge anchors comprising several strands of steel wire and an anchor bed plate, characterized in that, Also include: The mounting frame (1) comprises a back plate (15) and a plurality of partitions (14), a plurality of partitions (14) are fixedly installed on the front surface of the back plate (15), and a plurality of partitions (14) divide the back plate (15) into a plurality of compartments (13). A circular hole is formed in the middle of the back plate (15) in the compartment (13); A plurality of anchor boxes (2) are fixedly installed in a plurality of compartments (13), the installation part (22) of the anchor box (2) passes through the circular hole and is located on the back surface of the back plate (15), and is suitable for wearing the steel strand; The mounting frame (1) and the anchor pad are clamped and fixed between the fixed plate (4), and the mounting frame (1) is fixedly installed on the fixed plate (4) through the installation part (22) of the anchor box (2); The front surface of the fixed plate (4) is spaced apart and a plurality of installation grooves (41) are formed, the installation pipe (42) is fixedly installed in the installation groove (41), and the steel strand is installed in the installation pipe (42).

2. The fixing device for bridge group anchors according to claim 1, characterized in that, The anchor box (2) is a rectangular structure, the side end of the anchor box (2) is fixedly installed on the partition (14), and the middle part of the anchor box (2) is provided with the installation part (22).

3. The anchoring device for a bridge group according to claim 2, characterized in that, The installation part (22) is a cylindrical structure, the outer end surface of the installation part (22) is provided with a grouting hole (221), a pipeline installation hole (222) and a plurality of anchor box installation holes (223).

4. The anchoring device for a bridge group according to claim 3, characterized in that, The installation groove (41) is also provided with a fixed plate grouting hole (43), which is suitable for grouting into the installation pipe (42).

5. The anchoring device for a bridge group according to claim 4, characterized in that, The fixed plate grouting hole (43) is respectively communicated with the grouting hole (221), the grouting hole of the anchor pad, and the grouting hole of the anchor pad is communicated with the installation pipe (42); Both ends of the installation pipe (42) are respectively fixedly installed in the anchor pad and the pipeline installation hole (222).

6. A method for construction of a bridge group anchor, characterized by The bridge group anchor is installed by the fixing device according to any one of claims 1 to 5, comprising the following steps: Step S101, assembling the mounting frame (1) and the anchor box (2) A plurality of anchor boxes (2) are fixedly installed on the mounting frame (1); Adjust the installation angle of the anchor box (2) during installation, and adjust the installation angle of the steel strand; Step S103, connecting the mounting frame (1) and the fixed plate (4) The installation part (22) of the anchor box (2) is fixedly installed on the fixed plate (4), and the anchor pad construction is carried out; Step S105, disassembling the anchor box (2) After the construction is completed, a plurality of anchor boxes (2) are removed by using a disassembling device (3).

7. The method for construction of a bridge group anchor according to claim 6, characterized in that, In the step S105 of disassembling the anchor box (2), the disassembling device (3) comprises a connecting plate (33) and a disassembling rod (31), the connecting plate (33) is provided with the disassembling rod (31) in the middle, the top end of the disassembling rod (31) is provided with a fixed nut (34), and the bottom end of the disassembling rod (31) is provided with a pin shaft (311); A plurality of supporting legs (32) are fixedly installed on the bottom end surface of the connecting plate (33).

8. The method for construction of a bridge group anchor according to claim 7, characterized in that, In the step S105 of disassembling the anchor box (2), the both side ends of the anchor box (2) are fixedly installed with an ear plate (21); Two ends of the pin shaft (311) are respectively inserted through two of the ear plates (21), the connecting plate (33) is then sleeved on the dismounting rod (31), the supporting leg (32) is abutted against the partition plate (14) on the periphery of the anchor box (2), finally the fixing nut (34) is sleeved on the dismounting rod (31) and is continuously screwed until the anchor box (2) is separated from the fixing plate (4).

Images