An assembling method for positioning of beam web reinforcement

Abstract

The present application belongs to the field of bridge construction technology, and discloses an assembly method for beam web reinforcement installation and positioning, comprising a plurality of support frames, a plurality of reinforcement positioning pins; further comprising the following steps: S1, adjusting the spacing of the support frames and the relative height difference of the plurality of support frames; S2, installing a hoisting device on the plurality of support frames; S3, installing a vertical non-adhesion force steel rod and a beam web vertical bar on the hoisting device; S4, pushing out the reinforcement positioning pin; S5, installing the longitudinal reinforcement of the beam web on the reinforcement positioning pin and binding and connecting with the beam web vertical bar; S6, withdrawing the reinforcement positioning pin; S7, integrally adjusting and installing the beam web reinforcement framework to the beam end; S8, connecting the beam web reinforcement framework with the bottom plate reinforcement. The present application can improve the installation efficiency of the beam web reinforcement framework, ensure the positioning accuracy, and adapt to the changes of the beam cross-sectional size and height size within a certain range, and realize repeated use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge construction, in particular to an assembly method for reinforcing bar installation and positioning of a beam web. BACKGROUND

[0002] In recent years, large-span variable cross-section prestressed beam bridges have been increasingly applied to the superstructure of domestic bridges. However, the installation and positioning process of the web vertical reinforcement and the web longitudinal reinforcement of the beam body has been carried out according to the traditional construction process, resulting in low installation efficiency and inaccurate positioning. The conventional support structure cannot be applied to the three-position changes of the continuous beam cross-section, beam height and vertical prestressed reinforcement. In addition, the continuous beam construction is affected by the construction operation surface during the concrete setting period, resulting in a large number of idle construction personnel and machinery, low construction utilization rate, and a large amount of waste of manpower and resources for construction progress. SUMMARY

[0003] In view of the technical problems in the prior art, the present application provides an assembly method for reinforcing bar installation and positioning of a beam web, which comprises a plurality of support frames, the plurality of support frames are arranged at intervals along the length direction of the beam body, the support frame comprises two upright columns arranged oppositely and a connecting cross beam connected between the two upright columns, a steel plate is installed at the bottom of the upright column, a plurality of long strip-shaped holes are arranged on the steel plate, a plurality of reinforcing bar positioning pins are arranged at intervals in the vertical direction on the support frame, and the reinforcing bar positioning pin is in sliding connection with the support frame.

[0004] Further comprising the following steps:

[0005] S1, determine the pre-assembled base thickness according to the full-bridge highest bottom plate thickness near the bridge site, embed the bolts in the pre-assembled base to form the pre-assembled base, install a jacking mechanism at the top center of the pre-assembled base, adjust the elevation of the support frame of different cross sections through the jacking mechanism, adjust the transverse distance between the two upright columns through the reserved space of the long strip-shaped hole, match the different segment beam height and web thickness changes by combining the length interval of the reinforcing bar positioning pin, and fasten the bolts to insert the connecting cross beam into the two upright columns of the same section after the adjustment of the support frame is completed.

[0006] S2, install a vertical unbonded prestressed steel rod overall lifting device on the connecting cross beam of the support frame, the vertical unbonded prestressed steel rod overall lifting device comprises two positioning perforated square steels and a through connecting rod, the two positioning perforated square steels are arranged according to the reinforcing bar spacing requirement, a plurality of vertical unbonded prestressed steel anchor boxes are arranged at intervals along the length direction between the two positioning perforated square steels, the through connecting rod penetrates one positioning perforated square steel, a vertical unbonded prestressed steel anchor box and another positioning perforated square steel in sequence, and connects the vertical unbonded prestressed steel anchor box with the two positioning perforated square steels to form an integral whole, and a plurality of positioning grooves are arranged at the top of the positioning perforated square steel along the length direction.

[0007] S3, installing vertical unbonded prestressed steel rod on vertical unbonded prestressed steel anchor box, pushing out steel bar positioning plug, installing beam web longitudinal steel bar on steel bar positioning plug, clamping beam web vertical steel bar in positioning groove, and synchronously installing U-shaped steel anchor box support rod, binding and connecting beam web vertical steel bar and beam web longitudinal steel bar at contact point;

[0008] S4, withdrawing steel bar positioning plug to make beam web longitudinal steel bar loose from steel bar positioning plug;

[0009] S5, integrally lifting and installing vertical unbonded prestressed steel rod and beam web steel bar framework to beam end segment position, connecting beam web longitudinal steel bar with longitudinal steel bar of poured segment, and connecting beam web vertical steel bar with bottom plate steel bar;

[0010] S6, removing vertical unbonded prestressed steel rod integrally lifting device, retaining vertical unbonded prestressed steel anchor box, and supporting stress by U-shaped steel anchor box support rod on beam web vertical steel bar, and plugging hole on vertical unbonded prestressed steel anchor box;

[0011] S7, connecting top plate steel bar and chamfered steel bar with beam web steel bar framework, connecting prestressed pipe with reserved part of upper segment and limiting by steel bar, and pouring concrete after all processes are completed;

[0012] S8, pulling out vertical unbonded prestressed steel anchor box after concrete reaches certain strength, and reassembling vertical unbonded prestressed steel anchor box and vertical unbonded prestressed steel rod integrally lifting device for next segment.

[0013] Preferably, the jacking mechanism comprises a hydraulic cylinder, and an extension end of the hydraulic cylinder abuts against the steel plate.

[0014] Preferably, a plurality of the long strip-shaped holes are symmetrically arranged at corners of the steel plate, a length direction of the long strip-shaped hole is consistent with a length direction of the connecting cross beam, the bolt corresponds to the long strip-shaped hole one by one, and an end of the bolt away from the pre-piling base penetrates through the long strip-shaped hole.

[0015] Preferably, the steel bar positioning plug comprises a limiting plate and an L-shaped positioning plug rod, a long side of the L-shaped positioning plug rod is slidably connected with the stand, the limiting plate is fixedly installed on a side of the stand close to each other, a clamping groove matched with a short side of the L-shaped positioning plug rod is arranged on the limiting plate, and the L-shaped positioning plug rod is relatively fixed with the stand when the L-shaped positioning plug rod is matched with the clamping groove.

[0016] Preferably, the steel bar positioning plug further comprises a limiting pin, a limiting hole is arranged on the long side of the L-shaped positioning plug rod, the limiting pin is detachably installed in the limiting hole, and the limiting hole is located at an end away from the short side.

[0017] Preferably, the top of the positioning perforated square steel is provided with two lifting rings symmetrically along the length direction.

[0018] Preferably, the top of the vertical unbonded prestressed steel anchor box is provided with two lifting holes along the length direction of the beam web stud, and the two lifting holes are used for separating the vertical unbonded prestressed steel anchor box from the concrete.

[0019] Beneficial effects:

[0020] 1. In the present application, through the setting of the vertical unbonded prestressed steel rod whole lifting device, multiple groups of vertical unbonded force steel rods can be installed and positioned in advance, the positioning accuracy of the spacing between any two groups of vertical unbonded force steel rods is ensured, the installation efficiency and construction quality are improved, the problems of idle machinery and personnel during the concrete curing period are fully solved, the installation speed of the beam web stud can be accelerated by combining the positioning of the positioning groove, the spacing between the beam web studs and between the beam web studs and the vertical unbonded force steel rods can be locked, the vertical unbonded prestressed steel anchor box can be supported and stressed after the connecting rod is removed, the positioning perforated square steel can be reused, through the setting of multiple steel bar positioning pins, the installation and positioning of the beam web longitudinal steel bars can be realized, the beam web studs can be conveniently bound, the adjustment of the beam cross-sectional size can be realized by the cooperation of the different length positions of the beam web longitudinal steel bars and the steel bar positioning pins, the steel bar positioning pins can be conveniently separated from the beam web steel bar framework, the lifting of the vertical unbonded prestressed steel rod whole lifting device is facilitated, the support frame can be reused, through the setting of the jacking mechanism including the hydraulic cylinder, the height size of the support frame can be adjusted to match the beam height change, and the construction is facilitated.

[0021] 2. In the present application, through the setting of the long strip hole position and the length direction limitation, the column can be conveniently fixed, the spacing between the two columns can be finely adjusted, and the adjustment of the beam cross section is satisfied.

[0022] 3. In the present application, through the setting of the limiting plate and the L-shaped positioning plug rod, the L-shaped positioning plug rod can be conveniently limited, and the beam web longitudinal steel bars are prevented from falling off due to the sliding of the L-shaped positioning plug rod; through the cooperation of the limiting pin and the limiting hole, the beam web longitudinal steel bars are prevented from falling off from the end of the L-shaped positioning plug rod.

[0023] 4. In the present application, through the symmetrical setting of the two lifting rings, the installation and fixation of the lifting hook during lifting are facilitated, and the lifting process is more stable; through the setting of the two lifting holes, the vertical unbonded prestressed steel anchor box can be conveniently demolded, and the reuse is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the schematic diagram of the whole structure of the present application;

[0025] Figure 2 It is the schematic diagram of the installation structure of the steel bar positioning bolt in the withdrawn state of the present application;

[0026] Figure 3 It is the schematic diagram of the installation structure of the steel bar positioning bolt in the withdrawn state of the present application;

[0027] Figure 4 It is Figure 2 It is the schematic diagram of the detailed structure at A in the present application;

[0028] Figure 5 It is Figure 2 It is the schematic diagram of the detailed structure at B in the present application;

[0029] Figure 6 It is the schematic diagram of the steel plate structure of the present application;

[0030] Figure 7 It is the schematic diagram of the installation structure of the vertical unbonded prestressed steel rod overall lifting device of the present application;

[0031] Figure 8 It is Figure 7 It is the A-A partial sectional view in the present application;

[0032] Figure 9 It is Figure 7 It is the B-B partial sectional view in the present application.

[0033] In the figure: 1, support frame; 11, stand column; 12, connecting cross beam; 2, steel bar positioning bolt; 21, limiting plate; 22, L-shaped positioning plug rod; 23, limiting pin; 3, vertical unbonded prestressed steel rod overall lifting device; 31, positioning perforated square steel; 32, vertical unbonded prestressed steel anchor box; 321, lifting hole; 33, positioning groove; 34, through connecting rod; 35, U-shaped steel anchor box support rod; 41, hydraulic cylinder; 42, steel plate; 421, long strip-shaped hole; 43, bolt; 5, vertical unbonded prestressed steel rod; 6, beam body web stand bar; 7, beam body web longitudinal steel bar; 8, lifting ring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the present application.

[0035] The present application provides an assembly method for beam body web steel bar installation and positioning, such as Figures 1 to 9As shown, it comprises a plurality of support frames 1, a plurality of the support frames 1 are arranged at intervals along the length direction of the beam body, the support frame 1 comprises two oppositely arranged columns 11 and a connecting beam 12 connected between the two columns 11, the bottom of the column 11 is provided with a steel plate 42, a plurality of long strip-shaped holes 421 are arranged on the steel plate 42, a plurality of steel bar positioning pins 2 are arranged at intervals in the vertical direction on the support frame 1, and the steel bar positioning pin 2 is in sliding connection with the support frame 1;

[0036] Further comprising the following steps:

[0037] S1, determine the pre-assembled base thickness near the bridge position with the full-bridge maximum bottom plate thickness, embed the bolt 43 in the pre-assembled base to form the concrete, install the jacking mechanism on the top center of the pre-assembled base, adjust the elevation of the support frame 1 of different cross sections through the jacking mechanism, adjust the transverse spacing between the two columns 11 through the reserved space of the long strip-shaped hole 421, match the different segment beam height and web thickness changes in combination with the length interval of the steel bar positioning pin 2, and fasten the bolt 43 to insert the connecting beam 12 from one side into the two columns 11 of the same section after the adjustment of the support frame 1 is completed;

[0038] S2, install the vertical unbonded prestressed steel rod integral lifting device 3 on the connecting beam 12 of the support frame 1, the vertical unbonded prestressed steel rod integral lifting device 3 comprises two positioning perforated square steels 31 and a through connecting rod 34, the two positioning perforated square steels 31 are arranged according to the steel bar spacing requirement, a plurality of vertical unbonded prestressed steel anchor boxes 32 are arranged at intervals along the length direction between the two positioning perforated square steels 31, two through holes are arranged on the side surface of the specific vertical unbonded prestressed steel anchor box 32, and the two through holes are symmetrically arranged about the center of the vertical unbonded prestressed steel anchor box 32, the positioning perforated square steel 31 is provided with a connecting hole matched with the through hole, the through connecting rod 34 penetrates a positioning perforated square steel 31, a vertical unbonded prestressed steel anchor box 32 and another positioning perforated square steel 31 in sequence, and connects the vertical unbonded prestressed steel anchor box 32 and the two positioning perforated square steels 31 to form an integral whole, and a plurality of positioning grooves 33 are arranged on the top of the positioning perforated square steel 31 along the length direction;

[0039] S3, install vertical unbonded prestressed steel anchor box 32 on the vertical unbonded prestressed steel anchor box 32, specifically through the reserved hole and connecting bolt provided at the bottom of the vertical unbonded prestressed steel anchor box 32, realize the detachable connection of the vertical unbonded prestressed steel anchor box 32, push out the steel bar positioning pin 2, install the beam web longitudinal steel bar 7 on the steel bar positioning pin 2, and insert the beam web vertical steel bar 6 in the positioning groove 33, and synchronously install the U-shaped steel anchor box support rod 35, wherein the vertical unbonded prestressed steel anchor box 32 is installed at the bottom end of the U-shaped steel anchor box support rod 35, and the two ends of the U-shaped steel anchor box support rod 35 are located on the beam web vertical steel bar 6, and the beam web vertical steel bar 6 and the beam web longitudinal steel bar 7 are bound and connected at the contact point.

[0040] S4, pull out the steel bar positioning pin 2, so that the beam web longitudinal steel bar 7 is loosened from the steel bar positioning pin 2.

[0041] S5, the vertical unbonded prestressed steel rod overall lifting device 3 and the beam web steel bar framework overall positioning and installation are installed to the beam end segment position, the beam web longitudinal steel bar 7 is connected with the longitudinal steel bar of the poured segment, and the beam web vertical steel bar 6 is connected with the bottom plate steel bar.

[0042] S6, remove the vertical unbonded prestressed steel rod overall lifting device 3, retain the vertical unbonded prestressed steel anchor box 32, and support the stress by the U-shaped steel anchor box support rod 35 on the beam web vertical steel bar 6, and block the hole on the vertical unbonded prestressed steel anchor box 32.

[0043] S7, connect the top plate steel bar and the chamfered steel bar with the beam web steel bar framework, connect the prestressed pipe with the reserved part of the upper segment and limit with steel bars, and pour concrete after all processes are completed.

[0044] S8, after the concrete reaches a certain strength, pull out the vertical unbonded prestressed steel anchor box 32, reassemble the vertical unbonded prestressed steel anchor box 32 and the vertical unbonded prestressed steel rod overall lifting device 3 for use in the next segment.

[0045] Wherein the jacking mechanism comprises a hydraulic cylinder 41, the bottom of the two vertical columns 11 is provided with a hydraulic cylinder 41, the telescopic end of the hydraulic cylinder 41 abuts against the steel plate 42, the height of the two vertical columns 11 is adjusted through the two hydraulic cylinders 41, and then the height of the overall support frame 1 is adjusted, and in addition, the beam web longitudinal steel bar 7 and the beam web vertical steel bar 6 form a beam web steel bar framework.

[0046] In the embodiment, through the arrangement of the vertical unbonded prestressed steel rod overall lifting device 3, the multiple groups of vertical unbonded prestressed steel rods 5 can be installed and positioned in advance, the positioning accuracy of the spacing between any two groups of vertical unbonded prestressed steel rods 5 is ensured, the installation efficiency and construction quality are improved, the problem of idle machinery and personnel during the concrete curing period is solved, the positioning groove 33 is combined to accelerate the installation speed of the beam web stud 6, the spacing between the beam web studs 6 and between the beam web stud 6 and the vertical unbonded prestressed steel rod 5 is locked, the U-shaped steel anchor box support rod 35 is combined to support the vertical unbonded prestressed steel anchor box 32 after the connecting rod 34 is removed, the positioning perforated square steel 31 is reused, through the arrangement of the multiple steel bar positioning pins 2, the installation and positioning of the beam web longitudinal steel bars 7 are realized, the beam web longitudinal steel bars 7 and the steel bar positioning pins 2 are conveniently bound with the beam web stud 6, the cooperation of the different lengths of the beam web longitudinal steel bars 7 and the steel bar positioning pins 2 can realize the adjustment of the beam cross-sectional size, the steel bar positioning pin 2 is conveniently separated from the beam web steel reinforcement framework through the arrangement of the sliding connection between the steel bar positioning pin 2 and the stand column 11, the lifting of the vertical unbonded prestressed steel rod overall lifting device 3 is facilitated, the support frame 1 is reused, and the height of the support frame 1 is adjusted through the arrangement of the jacking mechanism including the hydraulic cylinder 41 to match the change of the beam height, and the construction is facilitated.

[0047] Preferably, as shown in Figure 2 、 Figure 4 、 Figure 6 A plurality of long strip-shaped holes 421 are symmetrically arranged at the corners of the steel plate 42, preferably four, the length direction of the long strip-shaped hole 421 is consistent with the length direction of the connecting cross beam 12, the bolt 43 corresponds to the long strip-shaped hole 421 one by one, and the end of the bolt 43 away from the pre-assembled base passes through the long strip-shaped hole 421.

[0048] In the embodiment, through the arrangement of the long strip-shaped hole 421 position and the length direction limitation, the stand column 11 can be conveniently fixed, and the spacing between the two stand columns 11 can be finely adjusted to meet the adjustment of the beam cross section.

[0049] Preferably, as shown in Figure 2 、 Figure 5As shown, the reinforcing steel positioning bolt 2 comprises a limiting plate 21 and an L-shaped positioning plug 22, the long side of the L-shaped positioning plug 22 is in sliding connection with the stand 11, the limiting plate 21 is fixedly installed on the side of the stand 11 close to each other, the limiting plate 21 is provided with a clamping groove matched with the short side of the L-shaped positioning plug 22, when the L-shaped positioning plug 22 is matched with the clamping groove, the L-shaped positioning plug 22 is relatively fixed with the stand 11; the reinforcing steel positioning bolt 2 further comprises a limiting pin 23, the long side of the L-shaped positioning plug 22 is provided with a limiting hole, the limiting pin 23 is detachably installed in the limiting hole, and the limiting hole is located at the end away from the short side.

[0050] In the embodiment, through the setting of the limiting plate 21 and the L-shaped positioning plug 22, the L-shaped positioning plug 22 can be conveniently limited, and the beam web longitudinal reinforcement 7 is prevented from falling off due to the sliding of the L-shaped positioning plug 22; in combination with the matched setting of the limiting pin 23 and the limiting hole, the beam web longitudinal reinforcement 7 is prevented from falling off from the end of the L-shaped positioning plug 22.

[0051] Preferably, as shown in the drawings, Figure 7 As shown, the top of the positioning perforated square steel 31 is provided with two lifting rings 8 symmetrically along the length direction.

[0052] In the embodiment, through the symmetrical setting of the two lifting rings 8, the installation and fixation of the lifting hook during hoisting can be facilitated, and the hoisting process is more stable.

[0053] Preferably, as shown in the drawings, Figure 8 As shown, the vertical unbonded prestressed steel anchor box 32 is provided with two lifting holes 321 at the top along the length direction of the beam web vertical stud 6, and the two lifting holes 321 are used for separating the vertical unbonded prestressed steel anchor box 32 from the concrete.

[0054] In the embodiment, through the setting of the two lifting holes 321, the vertical unbonded prestressed steel anchor box 32 can be conveniently demolded, and is convenient for repeated use.

[0055] As shown in the drawings, Figures 1 to 9As shown, the specific assembly process is: first, set the number of support frames 1 according to the construction length of the beam body, and set the spacing between adjacent support frames 1 according to the size of the cross-section change, and fix it with the support mechanism through the bolt 43 and the hydraulic cylinder 41. In this process, the height or inclination of the beam body can be adjusted by the extension and retraction of the hydraulic cylinder 41. The height of different support frames 1 can be the same or different, which is confirmed according to the actual situation. After adjustment, lock it through the bolt 43, then place the vertical unbonded prestressed steel rod integral lifting device 3 above the multiple connecting beams 12. In order to avoid the interference between the beam web stand bar 6 on the vertical unbonded prestressed steel rod integral lifting device and the L-shaped positioning plug rod 22, the L-shaped positioning plug rod 22 can be first slid between the two vertical columns 11 until the limit pin 23 just contacts the vertical column 11 to stop. Specifically, first rotate the L-shaped positioning plug rod 22 by 90° to disengage from the clamping groove on the limiting plate 21. After the vertical unbonded prestressed steel rod integral lifting device 3 is placed, then slide the L-shaped positioning plug rod 22 in the opposite direction and rotate it by 90° to cooperate with the clamping groove. At this time, the L-shaped positioning plug rod 22 will be in a relatively fixed state with the vertical column 11. The beam web longitudinal reinforcement 7 is placed on the long side of the L-shaped positioning plug rod 22 in turn. According to the size of the cross-section, the position of the beam web longitudinal reinforcement 7 will be different, and it will be tied with the beam web stand bar 6 at the corresponding position. Finally, rotate the L-shaped positioning plug rod 22 again and slide it between the two vertical columns 11, so that the limit pin 23 is disengaged from the beam web reinforcement cage. The vertical unbonded prestressed steel rod integral lifting device 3 and the beam web reinforcement cage are hoisted by the crane to the beam end of the bridge. After the beam web stand bar 6 and the beam web longitudinal reinforcement 7 are connected with the bottom plate reinforcement to form a support system, the vertical unbonded prestressed steel rod integral lifting device 3 is removed.

[0056] The specific installation process of the vertical unbonded prestressed steel rod overall lifting device 3 is as follows: first, the distance between the positioning groove 33 and the vertical unbonded prestressed steel anchor box 32 is confirmed according to the design requirement; then the vertical unbonded prestressed steel anchor box 32 is fixed and installed between the two positioning perforated square steels 31 through the through connecting rod 34, and is connected to form an integral whole; after the vertical unbonded prestressed steel rod 5 is installed, the beam web vertical reinforcement 6 is directly clamped into the positioning groove 33 with the confirmed distance, the U-shaped steel anchor box support rod 35 is connected with the beam web vertical reinforcement 6, and finally the lifting installation is performed through the lifting ring 8 at the top of the positioning perforated square steel 31; at this time, the vertical unbonded prestressed steel anchor box 32 is supported through the through connecting rod 34 and the positioning perforated square steel 31, when the lifting is completed, the beam web vertical reinforcement 6 is connected with the bottom plate steel reinforcement to form a support system, and then the through connecting rod 34 and the positioning perforated square steel 31 can be removed; at this time, the vertical unbonded prestressed steel anchor box 32 is supported by the U-shaped steel anchor box support rod 35 and the beam web vertical reinforcement 6, and the positioning perforated square steel 31 is reused; in addition, the hole of the vertical unbonded prestressed steel anchor box 32 is reserved before the concrete is poured, the perforation is plugged, and after the pouring is completed, the lifting hole 321 is used for lifting and demolding.

[0057] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, and other modifications or equivalent replacements to the technical solutions of the present application made by those skilled in the art should be covered in the scope of the claims of the present application, as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. An assembling method for positioning of beam web reinforcement, comprising a plurality of support frames (1) arranged at intervals along the length of the beam, the support frame (1) comprising two uprights (11) arranged opposite to each other and a connecting cross beam (12) connected between the two uprights (11), characterized in that, The bottom of the column (11) is provided with a steel plate (42) provided with a plurality of long strip-shaped holes (421), and a plurality of steel bar positioning pins (2) are arranged on the support frame (1) in the vertical direction and are in sliding connection with the support frame (1); Further comprising the following steps: S1, determining the pre-assembled base thickness near the bridge position with the full-bridge maximum bottom plate thickness, pre-burying bolts (43) in the pre-assembled base to form the pre-assembled base by pouring concrete, installing a jacking mechanism at the top center of the pre-assembled base, adjusting the elevations of the support frames (1) with different cross sections through the jacking mechanism, adjusting the lateral spacing between the two columns (11) through the reserved space of the long strip-shaped holes (421), matching the different segment beam heights and the thickness changes of the webs by combining the length intervals of the steel bar positioning pins (2), and fastening the bolts (43) to insert the connecting beams (12) from one side into the two columns (11) with the same section after the adjustment of the support frames (1) is completed; S2, installing a vertical unbonded prestressed steel bar overall lifting device (3) on the connecting beam (12) of the support frame (1), the vertical unbonded prestressed steel bar overall lifting device (3) comprising two positioning perforated square steels (31) and a through connecting rod (34), the two positioning perforated square steels (31) are arranged according to the steel bar spacing requirement, a plurality of vertical unbonded prestressed steel anchor boxes (32) are arranged between the two positioning perforated square steels (31) in the length direction of the positioning perforated square steels (31), the through connecting rod (34) penetrates one positioning perforated square steel (31), a vertical unbonded prestressed steel anchor box (32) and the other positioning perforated square steel (31) in sequence, and connects the vertical unbonded prestressed steel anchor box (32) and the two positioning perforated square steels (31) to form an integral whole, and a plurality of positioning grooves (33) are arranged on the top of the positioning perforated square steel (31) in the length direction; S3, installing a vertical unbonded force steel bar (5) on the vertical unbonded prestressed steel anchor box (32), pushing out the steel bar positioning pin (2), installing a beam web longitudinal steel bar (7) on the steel bar positioning pin (2), clamping a beam web stud (6) in the positioning groove (33), and synchronously installing a U-shaped steel anchor box support rod (35) to connect the beam web stud (6) and the beam web longitudinal steel bar (7) at the contact point; S4, pulling back the steel bar positioning pin (2) to release the beam web longitudinal steel bar (7) from the steel bar positioning pin (2); S5, placing and installing the vertical unbonded prestressed steel bar overall lifting device (3) and the beam web steel bar framework integral whole to the beam end segment position, connecting the beam web longitudinal steel bar (7) with the longitudinal steel bar of the already poured segment, and connecting the beam web stud (6) with the bottom plate steel bar; S6, removing the vertical unbonded prestressed steel bar overall lifting device (3) and retaining the vertical unbonded prestressed steel anchor box (32), supporting the stress on the beam web stud (6) by the U-shaped steel anchor box support rod (35), and plugging the holes on the vertical unbonded prestressed steel anchor box (32). S7, connect the top plate reinforcement with the chamfer reinforcement and the beam web reinforcement framework, connect the prestressed pipe with the reserved part of the upper segment and limit it with the reinforcement, and pour the concrete after all the processes are completed; S8, after the concrete reaches a certain strength, pull out the vertical unbonded prestressed steel anchor box (32), reassemble the vertical unbonded prestressed steel anchor box (32) and the vertical unbonded prestressed steel rod integral lifting device (3) for use in the next segment.

2. The assembly method for positioning of reinforcement in the web of a beam according to claim 1, wherein, The jacking mechanism comprises a hydraulic cylinder (41), and the telescopic end of the hydraulic cylinder (41) is in abutment with a steel plate (42).

3. The assembly method for positioning of reinforcement in the web of a beam according to claim 1, wherein, A plurality of long strip-shaped holes (421) are symmetrically arranged at the corners of the steel plate (42), the length direction of the long strip-shaped holes (421) is consistent with the length direction of the connecting cross beam (12), the bolts (43) correspond to the long strip-shaped holes (421) one by one, and the ends of the bolts (43) away from the pre-piling base pass through the long strip-shaped holes (421).

4. The assembly method for positioning the reinforcing bars in the web of the beam according to any one of claims 1 to 3, characterized in that, The steel bar positioning bolt (2) comprises a limiting plate (21) and an L-shaped positioning plug rod (22), the long side of the L-shaped positioning plug rod (22) is in sliding connection with the stand column (11), the limiting plate (21) is fixedly installed on the side of the stand column (11) close to each other, the limiting plate (21) is provided with a clamping groove matched with the short side of the L-shaped positioning plug rod (22), and the L-shaped positioning plug rod (22) is relatively fixed with the stand column (11) when the L-shaped positioning plug rod (22) is matched with the clamping groove.

5. The assembly method for positioning of reinforcement in a beam web according to claim 4, wherein, The steel bar positioning bolt (2) further comprises a limiting pin (23), the long side of the L-shaped positioning plug rod (22) is provided with a limiting hole, the limiting pin (23) is detachably installed in the limiting hole, and the limiting hole is located at the end away from the short side.

6. The assembly method for beam web reinforcement installation positioning according to claim 1, characterized in that, The top of the positioning perforated square steel (31) is symmetrically provided with two lifting rings (8) along the length direction.

7. The assembly method for beam web reinforcement installation positioning according to claim 1, characterized in that, The top of the vertical unbonded prestressed steel anchor box (32) is provided with two lifting holes (321) along the length direction of the beam web vertical reinforcement (6), and the two lifting holes (321) are used for separating the vertical unbonded prestressed steel anchor box (32) from the concrete.

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