Pin hinge scissors type steel bar for hinge joint of hollow slab beam bridge and installation method thereof

Abstract

The application discloses a pin hinge scissors type steel bar for a hollow slab beam bridge hinge joint and a mounting method thereof, and relates to the technical field of bridge structures. The pin hinge scissors type steel bar comprises a first steel bar member, a second steel bar member and a third steel bar member. The third steel bar member comprises a first bar body and a second bar body which are hingedly connected at their ends. The middle parts of the first steel bar member and the second steel bar member are hingedly connected, and the lower ends of the first steel bar member and the second steel bar member are hingedly connected with the ends of the first bar body and the second bar body respectively. The scissors type hinge joint construction steel bar is divided into a plurality of steel bar members, the steel bar members are connected through a pin hinge assembly, and a hinge joint longitudinal steel bar is inserted into a hinge joint of the pin hinge assembly, so that a scissors type hinge joint construction steel bar which can rotate at the position of the pin hinge assembly is effectively formed. The hinge joint steel bar construction width at the bottom can be reduced through rotation, the hinge joint steel bar can be conveniently placed in the hinge joint as a whole, the position of the steel bar is relatively fixed, and adjustment of the position of the steel bar in the later stage is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge structure, in particular to a pin hinge shear type steel bar for hinge joint of hollow slab beam bridge and a mounting method thereof. BACKGROUND

[0002] Hollow slab beam bridge is widely used in small and medium span bridges in China due to its simple structure, low building height, good stress performance, good stability, prefabrication in factory, on-site assembly, convenient and fast construction and other advantages. Hollow slab beam is prefabricated in factory and transported to the site, and is erected on the pier by hoisting equipment. After the erection of each prefabricated hollow slab, the hinge joint between the prefabricated slabs is poured on site to form a whole. During the operation of the bridge, the live load is transmitted to each hollow slab beam through the hinge joint, so that the hinge joint transmits shear force and bending moment, mainly in shear, and thus the shear performance of the hinge joint determines the overall stress performance of the hollow slab beam bridge.

[0003] At present, in the hinge joint construction process, on the one hand, the bonding strength of new and old concrete is improved by chiseling the old concrete on the hinge joint surface, and on the other hand, the hinge joint force transmission is enhanced by hinge joint steel structure measures to improve the bonding strength and ductility of the contact surface. The contact surface can be chiseled before the prefabricated beam is hoisted, and the surface is cleaned before hoisting, while the hinge joint steel can only be installed after hoisting. The arrangement form of hollow slab beam hinge joint steel is given in the Highway Bridge General Atlas (see Figure 1 ). Among them: hinge joint structural steel N1: bears longitudinal tensile stress and plays a role in restraining hinge joint concrete shrinkage; shear type hinge joint structural steel N2: bears tensile stress and plays a role in lifting the steel; steel N3: mainly participates in shear to improve the shear strength of the hinge joint, and can constrain the pavement layer to a certain extent; steel N4: mainly bears tensile stress to improve the shear strength of the hinge joint.

[0004] The steel bars N3 and N4 are embedded steel bars in the hollow slab, after the hollow slab is hoisted on site, the steel bar N4 is pulled down, then the steel bar N1 is put into the steel bar N2 and put into the hinge joint together, finally the steel bar N3 is pulled down. In the actual installation process of the hinge joint steel bars N1 and N2, two steel bars N1 are first put into the steel bar N2, then the two steel bars N1 are put into the hinge joint, and a plurality of equidistant steel bars N2 form a hinge joint steel bar, which is put down on the hollow slab. During installation, the steel bar N2 is twisted and put into the hinge joint, and then the steel bar is adjusted and installed. However, there are the following problems in the installation process of the hinge joint steel bar: (1) the steel bar N1 is not fixed when being put into the steel bar N2, so it is difficult to ensure the spacing of the steel bar N1 during the pouring of the concrete; (2) the steel bar N2 is a scissors type steel bar formed by bending a steel bar, which may cause a large gap between the two limbs during the installation of the steel bar N2, and the two limbs are not in the same plane; (3) in order to facilitate the installation of the steel bar N2 into the hinge joint, the equidistant steel bars N2 are horizontally arranged on the side of the hinge joint structure steel bar N2 after passing through the two longitudinal steel bars N1, and the steel bars N1 are arranged closely to form a plane. After the hinge joint structure steel bar N2 is put into the hinge joint, the position of each steel bar needs to be adjusted, which is time-consuming and laborious. Therefore, on the basis of not changing the existing hinge joint steel bar structure arrangement, how to improve the connection form for the hinge joint steel bar construction and the pouring of the concrete to improve the construction quality and efficiency of the hinge joint of the slab beam is a technical problem to be solved by the person skilled in the art. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a pin hinge scissors type steel bar for a hollow slab beam bridge hinge joint and an installation method thereof.

[0006] In order to solve the above technical problems, the technical scheme of the present application is as follows:

[0007] A pin hinge scissors type steel bar for a hollow slab beam bridge hinge joint, comprising: a first steel bar member; a second steel bar member; a third steel bar member comprising a first bar body and a second bar body which are hingedly connected at their ends;

[0008] The middle parts of the first steel bar member and the second steel bar member are hingedly connected, and the lower ends of the first steel bar member and the second steel bar member are hingedly connected with the ends of the first bar body and the second bar body, respectively.

[0009] As a preferred scheme of the pin hinge scissors type steel bar for a hollow slab beam bridge hinge joint, the middle parts of the first steel bar member and the second steel bar member are hingedly connected by a first pin hinge assembly, and the first pin hinge assembly comprises a first connecting member and a second connecting member which are hingedly connected at their middle parts.

[0010] The first reinforcing bar member comprises a third bar body and a fourth bar body, the second reinforcing bar member comprises a fifth bar body and a sixth bar body, one end of the third bar body and the fourth bar body is fixedly connected to the two ends of the second connecting piece respectively, and one end of the fifth bar body and the sixth bar body is fixedly connected to the two ends of the first connecting piece respectively; the lower end of the fourth bar body is hingedly connected to the end of the first bar body, and the lower end of the sixth bar body is hingedly connected to the end of the second bar body.

[0011] As a preferred scheme of the pin hinge scissors type reinforcing bar for the hinge joint of the hollow slab beam bridge, the lower end of the fourth bar body and the end of the first bar body, the lower end of the sixth bar body and the end of the second bar body, and the first bar body and the second bar body are hingedly connected through a second pin hinge assembly, and the second pin hinge assembly comprises a third connecting piece and a fourth connecting piece which are hingedly connected at the ends.

[0012] As a preferred scheme of the pin hinge scissors type reinforcing bar for the hinge joint of the hollow slab beam bridge, the first connecting piece comprises a first lug plate, and a first hinge hole is formed in the middle of the first lug plate.

[0013] The second connecting piece comprises a first lug seat, an insertion slot is formed in one end of the first lug seat for the first lug plate to extend into, a second hinge hole is formed in the middle of the first lug seat, and when the first lug plate extends into the insertion slot, the second hinge hole is aligned with the first hinge hole.

[0014] As a preferred scheme of the pin hinge scissors type reinforcing bar for the hinge joint of the hollow slab beam bridge, first connecting rods are fixedly arranged at the two ends of the first lug plate, second connecting rods are detachably mounted at the two ends of the first lug seat, and threaded holes are formed in the first connecting rods and the second connecting rods.

[0015] The ends of the third bar body and the fourth bar body connected to the second connecting piece and the ends of the fifth bar body and the sixth bar body connected to the first connecting piece are provided with external threads.

[0016] As a preferred scheme of the pin hinge scissors type reinforcing bar for the hinge joint of the hollow slab beam bridge, the third connecting piece comprises a second lug plate, and a third hinge hole is formed in one end of the second lug plate.

[0017] The fourth connecting piece comprises a second lug seat, an insertion slot is formed in one end of the second lug seat for the second lug plate to extend into, a fourth hinge hole is formed in the end of the second lug seat where the insertion slot is formed, and when the second lug plate extends into the insertion slot, the fourth hinge hole is aligned with the third hinge hole.

[0018] As a preferred scheme of the pin hinge scissors type steel bar for the hinge joint of the hollow slab beam bridge, one end of the third connecting rod is fixedly provided with a threaded hole.

[0019] The end of the fourth rod body, the sixth rod body, the first rod body and the second rod body connected with the second pin hinge assembly is provided with an external thread.

[0020] As a preferred scheme of the pin hinge scissors type steel bar for the hinge joint of the hollow slab beam bridge, one end of the third rod body and the fifth rod body away from the first pin hinge assembly is provided with a bending part.

[0021] The application further provides a mounting method of the pin hinge scissors type steel bar for the hinge joint of the hollow slab beam bridge, comprising:

[0022] The first rod body, the second rod body and the second pin hinge assembly are connected to form a third steel bar, then a plurality of third steel bars are arranged along the hinge joint in sequence at equal intervals in the longitudinal direction, and the hinge joint longitudinal steel bar is passed through the third hinge hole and the fourth hinge hole in the second pin hinge assembly in the plurality of third steel bars to form a fishbone-shaped arrangement.

[0023] The two ends of the third steel bar are connected with the third connecting piece in the second pin hinge assembly, respectively, then the second ear plate of the third connecting piece is inserted into the second ear seat of the fourth connecting piece in the second pin hinge assembly, the hinge holes are aligned, the hinge joint longitudinal steel bar is passed through the hinge holes of the second pin hinge assembly as a pin shaft, and is passed through the third steel bars arranged at equal intervals in the longitudinal direction in sequence, so that the fishbone-shaped arrangement forms a net-shaped arrangement.

[0024] On the basis of the net-shaped arrangement, the first connecting piece and the second connecting piece in the first pin hinge assembly are mounted to ensure that the hinge holes are aligned, then one end of the fourth rod body of the first steel bar is connected with the fourth connecting piece of the second pin hinge assembly, and the other end is connected with the second connecting piece of the first pin hinge assembly, one end of the sixth rod body of the second steel bar is connected with the fourth connecting piece of the second pin hinge assembly, and the other end is connected with the first connecting piece of the first pin hinge assembly, finally the hinge joint longitudinal steel bar is passed through the hinge holes of the first pin hinge assembly in sequence, the net-shaped arrangement forms a triangular steel cage arrangement, and the triangular steel cage arrangement can be stably placed on the bridge deck.

[0025] On the basis of the triangular steel cage, the third rod body of the first steel bar and the fifth rod body of the second steel bar are connected with the second connecting piece and the first connecting piece of the first pin hinge assembly, respectively, and finally a hinge joint steel structure arrangement is formed.

[0026] Lifting the hinge joint longitudinal steel bar in the first pin hinge assembly, under the weight of the steel bar, the second pin hinge assembly in the middle of the third steel bar rotates and folds down, reducing the bottom width of the scissors type hinge joint structure steel bar, at the same time, the third bar body and the fifth bar body approach each other, so that the transformed "X" shaped scissors type structure steel bar forms a "T" shaped scissors type structure steel bar, and then the hinge joint structure steel bar is put into the hinge joint;

[0027] The hinge joint steel bar is put into the hollow slab beam hinge joint, when the hinge joint longitudinal steel bar in the middle of the third steel bar touches the bottom of the hinge joint, under the support of the hinge joint bottom, the folded third steel bar is unfolded, so that the included angle between the first bar body and the second bar body is 180°, at the same time, the third bar body and the fifth bar body move away from each other, so that the "T" shaped scissors type structure steel bar forms an "X" shaped scissors type structure steel bar;

[0028] The upper end bending part of the third bar body and the fifth bar body is bound and connected with the pre-buried bent steel bar on both sides of the top of the hollow slab beam.

[0029] The beneficial effects of the present application are:

[0030] (1) The present application splits the traditional scissors type hinge joint structure steel bar into multiple steel bar bodies, the steel bar body is simple and convenient to manufacture, improves the manufacturing precision and efficiency of the scissors type hinge joint structure steel bar, four pin hinge assemblies are arranged to connect the steel bar bodies together, in addition, the hinge joint longitudinal steel bar is inserted into the hinge joint hole of the pin hinge assembly as a pin shaft, so that all the steel bar bodies in the scissors type hinge joint structure steel bar can rotate in the same plane around the hinge joint longitudinal steel bar at the pin hinge position, thereby the bottom width of the scissors type hinge joint structure steel bar can be adjusted, the hinge joint steel bar is conveniently put into the hollow slab beam hinge joint, the installation and construction efficiency is improved, and the construction time is saved.

[0031] (2) The scissors type hinge joint structure steel bar and the hinge joint longitudinal steel bar in the present application are convenient to assemble and relatively fixed in position, after the hinge joint longitudinal steel bar is inserted, the pin hinge assemblies of the scissors type hinge joint structure steel bar are arranged at equal intervals, after the whole is quickly installed on the site beam body, when the hinge joint steel bar is installed, the scissors type hinge joint steel bar changes from "X" shape to "T" shape, and then changes from "T" shape to "X" shape, which can be quickly and accurately put into the hinge joint, avoids the position adjustment of the traditional installed steel bar, effectively reduces the construction time, and improves the hinge joint steel bar construction quality.

[0032] (3) Compared with the traditional scissors type hinge joint structure steel bar, three hinge joint longitudinal steel bars are arranged at the bottom, the bottom hinge joint longitudinal steel bar mainly bears tensile stress. According to the principle of equivalent reinforcement, the diameter of the three hinge joint longitudinal steel bars can be appropriately reduced. At the same time, a hinge joint longitudinal steel bar is arranged in the middle of the scissors type hinge joint structure steel bar, so that it can participate in the compression of the upper part, improve the stress of the hinge joint steel bar concrete, and improve the working performance of the hollow slab beam hinge joint.

[0033] (4) The hinge joint steel bar installation difficulty is effectively reduced, the hinge joint steel bar installation precision is improved, and the construction time is saved. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Figure 1 It is a schematic diagram of arrangement of hinge joint steel bars of a traditional hollow slab beam;

[0036] Figure 2 It is a schematic diagram of arrangement of hinge joint steel bars of a traditional hollow slab beam;

[0037] Figure 3 It is a schematic diagram of structure of hinge joint steel bars of a traditional hollow slab beam;

[0038] Figure 4 It is a schematic diagram of structure of pin hinge scissors type steel bars for a hinge joint of a hollow slab beam bridge provided by the present application;

[0039] Figure 5 It is a schematic diagram of structure of a first pin hinge assembly in pin hinge scissors type steel bars for a hinge joint of a hollow slab beam bridge provided by the present application;

[0040] Figure 6 It is a schematic diagram of structure of a first connecting piece in a first pin hinge assembly in pin hinge scissors type steel bars for a hinge joint of a hollow slab beam bridge provided by the present application;

[0041] Figure 7 It is a schematic diagram of structure of a second connecting piece in a first pin hinge assembly in pin hinge scissors type steel bars for a hinge joint of a hollow slab beam bridge provided by the present application;

[0042] Figure 8 It is a schematic diagram of structure of a second pin hinge assembly in pin hinge scissors type steel bars for a hinge joint of a hollow slab beam bridge provided by the present application;

[0043] Figure 9 It is a schematic diagram of structure of a second pin hinge assembly in pin hinge scissors type steel bars for a hinge joint of a hollow slab beam bridge provided by the present application;

[0044] Figure 10 It is a schematic diagram of flow of a mounting method of pin hinge scissors type steel bars for a hinge joint of a hollow slab beam bridge provided by the present application;

[0045] Figure 11The assembly schematic diagram of the pin hinge scissors type steel bar and the hinge longitudinal steel bar for the hollow slab beam bridge hinge joint is provided for the present application.

[0046] Figure 12 The installation flow schematic diagram of the pin hinge scissors type steel bar for the hollow slab beam bridge hinge joint is provided for the present application.

[0047] Wherein: 1, first rod body; 2, second rod body; 3, first pin hinge assembly; 4, first connecting piece; 5, second connecting piece; 6, third rod body; 7, fourth rod body; 8, fifth rod body; 9, sixth rod body; 10, second pin hinge assembly; 11, third connecting piece; 12, fourth connecting piece; 13, first lug plate; 14, first hinge hole; 15, first lug seat; 16, insertion slot; 17, second hinge hole; 18, first connecting rod; 19, second connecting rod; 20, threaded hole; 21, second lug plate; 22, third hinge hole; 23, second lug seat; 24, fourth hinge hole; 25, third connecting rod; 26, bending part. DETAILED DESCRIPTION

[0048] In order to make the content of the present application more easily understood, the present application is further described in detail below according to the specific embodiments and in combination with the drawings.

[0049] Figure 4 The structure schematic diagram of the pin hinge scissors type steel bar for the hollow slab beam bridge hinge joint is provided for the present application. The device comprises a first steel bar rod piece, a second steel bar rod piece, a third steel bar rod piece, a first pin hinge assembly 3 and a second pin hinge assembly 10. The middle parts of the first steel bar rod piece and the second steel bar rod piece are hinged through the first pin hinge assembly 3. The third steel bar rod piece comprises a first rod body 1 and a second rod body 2 which are hinged at the ends through the second pin hinge assembly 10. The lower ends of the first steel bar rod piece and the second steel bar rod piece are hinged with the ends of the first rod body 1 and the second rod body 2 through the second pin hinge assembly 10. The scissors type hinge joint construction steel bar is transformed into a construction steel bar structure which can rotate through the pin hinge mode at the intersection point and the bottom connection position of the scissors type hinge joint construction steel bar, so that the scissors type construction steel bar is convenient to install.

[0050] Specifically, the first pin hinge assembly 3 comprises a first connecting piece 4 and a second connecting piece 5 which are hinged at the middle parts. Referring to Figure 6 . The first connecting piece 4 comprises a first lug plate 13, and the middle part of the first lug plate 13 is provided with a first hinge hole 14. The first connecting rod 18 is fixedly arranged at both ends of the first lug plate 13 in the length direction, and the threaded hole 20 is arranged in the first connecting rod 18. Referring to Figure 6The second connecting member 5 comprises a first lug 15, one end of which is provided with a slot 16 for the first lug 13 to extend into. A second hinge hole 17 is provided in the middle of the first lug 15. When the first lug 13 extends into the slot 16, the first hinge hole 14 can be aligned with the second hinge hole 17. Then, when a pin is inserted into the first hinge hole 14 and the second hinge hole 17, the first connecting member 4 and the second connecting member 5 can rotate around the pin. Second connecting rods 19 are screwed into both ends of the first lug 15, and threaded holes 20 are provided in the second connecting rods 19.

[0051] Preferably, in the embodiment, the first lug 13 is flat, and its thickness is smaller than the diameter of the first connecting rod 18. The inner clearance of the slot 16 in the first lug 15 is slightly larger than the thickness of the first lug 13, and smaller than the diameter of the first connecting rod 18. In this way, when the first lug 13 extends into the slot 16, and the second connecting rods 19 are screwed into both ends of the first lug 15, the first connecting rods 18 at both ends of the first lug 13 and the second connecting rods 19 at both ends of the first lug 15 can function as limiting rods, limiting the first lug 13 in the slot 16 of the first lug 15.

[0052] Referring to Figure 4 The first reinforcing bar member comprises a third bar body 6 and a fourth bar body 7. The second reinforcing bar member comprises a fifth bar body 8 and a sixth bar body 9. The upper ends of the third bar body 6 and the fifth bar body 8 are provided with bent portions 26 away from each other. The lower ends of the third bar body 6 and the fifth bar body 8 and the upper ends of the fourth bar body 7 and the sixth bar body 9 are provided with external threads. The lower end of the third bar body 6 and the upper end of the fourth bar body 7 can be screwed into the threaded holes 20 in the first connecting rod 18, and the lower end of the fifth bar body 8 and the upper end of the sixth bar body 9 can be screwed into the threaded holes 20 in the second connecting rod 19, forming an "X"-shaped reinforcing structure.

[0053] Referring to Figure 4 In the embodiment, three second pin hinge assemblies 10 are provided. The three second pin hinge assemblies 10 are respectively provided between the lower end of the fourth bar body 7 and the end of the first bar body 1, between the lower end of the sixth bar body 9 and the end of the second bar body 2, and between the first bar body 1 and the second bar body 2. Figure 8The second pin hinge assembly 10 comprises a third connecting piece 11 and a fourth connecting piece 12 which are hingedly connected at the ends. The third connecting piece 11 comprises a second lug 21. The second lug 21 is provided with a third hinge hole 22 at one end. The fourth connecting piece 12 comprises a second lug seat 23. The second lug seat 23 is provided with a slot 16 into which the second lug 21 extends at one end, and is provided with a fourth hinge hole 24 at the end. When the second lug 21 extends into the slot 16, the fourth hinge hole 24 can be aligned with the third hinge hole 22. When a pin is inserted into the first hinge hole 14 and the second hinge hole 17, the first connecting piece 4 and the second connecting piece 12 can rotate around the pin. A third connecting rod 25 is fixedly arranged at the other end of the second lug 21 and the second lug seat 23, and a threaded hole 20 is arranged in the third connecting rod 25.

[0054] Correspondingly, external threads are arranged at the lower ends of the fourth rod body 7 and the sixth rod body 9 and at the two ends of the first rod body 1 and the second rod body 2. The lower ends of the fourth rod body 7 and the sixth rod body 9 and the two ends of the first rod body 1 and the second rod body 2 can be threadedly installed in the threaded holes 20 in the corresponding third connecting rods 25.

[0055] It can be understood that the modified scissors-type hinge construction steel bar is split into a plurality of steel rod pieces from the conventional scissors-type hinge construction steel bar, and the steel rod pieces are simple and convenient to manufacture. Meanwhile, the four pin hinge assemblies are arranged to connect the steel rod pieces together, and the scissors-type hinge construction steel bar can be freely folded and unfolded.

[0056] In the embodiment, the hinge longitudinal steel bar is used as a pin shaft, and is inserted into the aligned hinge holes in the first pin hinge assembly 3 and the aligned hinge holes in the second pin hinge assembly 10, so that the scissors-type hinge construction steel bar and the hinge longitudinal steel bar form a whole, and all the steel rod pieces of the scissors-type hinge construction steel bar can rotate around the longitudinal steel bar at the pin hinge position in the same plane, thereby reducing the bottom width of the scissors-type hinge construction steel bar, facilitating the placement of the hinge steel bar into the hollow slab beam hinge, improving the installation and construction efficiency, and saving the construction time.

[0057] In addition, a second pin hinge assembly 10 is arranged at the middle position of the third steel rod piece of the scissors-type hinge construction steel bar, and a hinge longitudinal steel bar is arranged as a pin shaft, so that the middle position of the third steel rod piece can also rotate, thereby realizing that when the hinge longitudinal steel bar is lifted, the hinge longitudinal steel bar at the middle position of the third steel rod piece falls under the action of gravity, the two ends of the bottom of the scissors-type hinge construction steel bar move towards the middle, and the third rod body 6 and the fifth rod body 8 at the top also move towards each other. The final degree of convergence depends on the rotation degree of the first pin hinge assembly 3 at the middle of the scissors-type hinge construction steel bar.

[0058] It can be understood that the modified scissors type hinge joint structure steel bar is provided with three hinge joint longitudinal steel bars at the bottom compared with the traditional scissors type hinge joint structure steel bar, and the bottom hinge joint longitudinal steel bars mainly bear tensile stress. According to the reinforcement equivalent principle, the diameter of the three hinge joint longitudinal steel bars can be appropriately reduced. Meanwhile, a hinge joint longitudinal steel bar is arranged at the middle of the scissors type hinge joint structure steel bar, so that it can participate in the compression of the upper part, improve the stress of the hinge joint reinforced concrete, and improve the working performance of the hinge joint of the hollow slab beam.

[0059] Referring to Figure 10 , the embodiment of the present application also provides a mounting method of the pin hinge scissors type steel bar for the hinge joint of the hollow slab beam bridge. The mounting method comprises steps S101-S107. Referring to Figure 12 , the specific steps are as follows:

[0060] Step S101: connecting the first rod body 1, the second rod body 2 and the second pin hinge assembly 10 to form a third steel bar rod piece, then arranging a plurality of third steel bar rod pieces along the longitudinal direction of the hinge joint in sequence at equal intervals, and passing the hinge joint longitudinal steel bar through the third hinge joint hole 22 and the fourth hinge joint hole 24 in the second pin hinge assembly 10 in the plurality of third steel bar rod pieces.

[0061] Specifically, the threaded end of the first rod body 1 is screwed into the threaded hole 20 of the third connecting piece 11 of the second pin hinge assembly 10, the threaded end of the second rod body 2 is screwed into the threaded hole 20 of the fourth connecting piece 12 of the second pin hinge assembly 10, and the first rod body 1 and the second rod body 2 are connected to form a third steel bar rod piece through the second pin hinge assembly 10. Finally, the hinge joint longitudinal steel bar N1 is passed through the hinge joint hole as a pin shaft, and the third steel bar rod piece is arranged longitudinally at equal intervals according to the steps to form a fishbone type arrangement.

[0062] Step S102: connecting the two ends of the third steel bar rod piece to the third connecting piece 11 in the second pin hinge assembly 10 respectively, then inserting the second ear plate 21 of the third connecting piece 11 into the second ear seat 23 of the fourth connecting piece 12 in the second pin hinge assembly 10, aligning the hinge joint holes, passing the hinge joint longitudinal steel bar N1 through the hinge joint holes of the second pin hinge assembly 10 as a pin shaft, and sequentially passing through the third steel bar rod pieces arranged longitudinally at equal intervals to form a mesh arrangement in the fishbone shape.

[0063] Specifically, on the basis of the fishbone arrangement, the other side threaded end of the first rod body 1 is screwed into the threaded hole 20 of the third connecting piece 11 of the second pin hinge assembly 10, and the other side threaded end of the second rod body 2 is screwed into the threaded hole 20 of the third connecting piece 11 of the second pin hinge assembly 10. Then the second lug 21 of the third connecting piece 11 is inserted into the second lug seat 23 of the fourth connecting piece 12 in the second pin hinge assembly 10, and after the hinge hole 22 of the third connecting piece 11 is aligned with the hinge hole 24 of the fourth connecting piece 12, the pin shaft (hinge joint longitudinal steel bar N1) is passed through the hinge hole and sequentially passed through the third steel bar member arranged in equal intervals in the longitudinal direction, so that the upper and lower sides of the fishbone arrangement are connected by the hinge joint steel bar N1 to form a mesh arrangement shape.

[0064] Step S103: On the basis of the mesh arrangement shape, the first connecting piece 4 and the second connecting piece 5 in the first pin hinge assembly 3 are installed, and the hinge holes are aligned. Then the fourth rod body 7 of the first steel bar member is connected to the fourth connecting piece 12 of the second pin hinge assembly 10 at one end and to the second connecting piece 5 of the first pin hinge assembly 3 at the other end. The sixth rod body 9 of the second steel bar member is connected to the fourth connecting piece 12 of the second pin hinge assembly 10 at one end and to the first connecting piece 4 of the first pin hinge assembly 3 at the other end. Finally, after the pin shaft (hinge joint longitudinal steel bar N1) is passed through the hinge hole of the first pin hinge assembly 3, it is sequentially passed through the first pin hinge assembly arranged in equal intervals in the longitudinal direction, and the mesh arrangement forms a triangular steel cage arrangement.

[0065] Specifically, the first pin hinge assembly 3 is installed first, the first lug 13 of the first connecting piece 4 is inserted into the first lug seat 15 in the second connecting piece 5, and the first hinge hole 14 of the first lug 13 is aligned with the second hinge hole 17 of the first lug seat 15. Then the second connecting rod 19 of the second connecting piece 5 is connected to the two ends of the first lug seat 15, respectively. Then the fourth rod body 7 of the first steel bar member is connected to the fourth connecting piece 12 of the second pin hinge assembly 10 at one end and to the second connecting piece 5 of the first pin hinge assembly 3 at the other end. The sixth rod body 9 of the second steel bar member is connected to the fourth connecting piece 12 of the second pin hinge assembly 10 at one end and to the first connecting piece 4 of the first pin hinge assembly 3 at the other end. Finally, after the pin shaft (hinge joint longitudinal steel bar N1) is passed through the hinge hole of the first pin hinge assembly 10, it is sequentially passed through the first pin hinge assembly arranged in equal intervals in the longitudinal direction, and the mesh arrangement forms a triangular steel cage arrangement, which can be stably placed on the bridge deck.

[0066] Step S104: On the basis of the triangular steel cage, the third rod body 6 of the first steel bar member and the fifth rod body 8 of the second steel bar member are connected to the second connecting piece 5 and the first connecting piece 4 of the first pin hinge assembly 3, respectively, to finally form a hinge joint steel bar structure arrangement, as shown in Figure 11 .

[0067] Specifically, the threaded end of the third rod body 6 of the first steel bar member is screwed into the threaded hole 20 of the second connecting rod 19 in the first pin hinge assembly 3, and the threaded end of the fifth rod body 8 of the second steel bar member is screwed into the threaded hole 20 of the first connecting rod 18 in the first pin hinge assembly 3, and finally the bent part of the hinge joint steel bar is installed to form the hinge joint steel bar structure arrangement.

[0068] Step S105: Lift the hinge joint longitudinal steel bar N1 in the first pin hinge assembly 3, and under the weight of the steel bar, the second pin hinge assembly 10 in the middle of the third steel bar member rotates and folds down, reducing the bottom width of the scissors-type hinge joint structure steel bar, while the third rod body 6 and the fifth rod body 8 approach each other, making the modified "X" structure scissors-type structure steel bar N2 into a "T" type structure scissors-type structure steel bar N2, and then the hinge joint structure steel bar is placed into the hinge joint.

[0069] Specifically, since the first pin hinge assembly 3 and the second pin hinge assembly 10 are provided in the traditional scissors-type hinge joint structure steel bar N2, the steel bar members in the modified scissors-type hinge joint structure steel bar N2 can rotate in the same plane, and the bottom width of the scissors-type hinge joint structure steel bar N2 is reduced by rotating the steel bar members to approach each other, facilitating the placement of the scissors-type hinge joint structure steel bar N2 into the hinge joint.

[0070] Step S106: Place the hinge joint steel bar into the hollow slab beam hinge joint, and when the hinge joint longitudinal steel bar N1 in the middle of the third steel bar member touches the bottom of the hinge joint, under the support of the hinge joint bottom, unfold the folded third steel bar member, making the included angle between the first rod body 1 and the second rod body 2 180°, while the third rod body 6 and the fifth rod body 8 move away from each other, making the "T" type structure scissors-type structure steel bar N2 into an "X" type structure scissors-type structure steel bar N2.

[0071] Specifically, after the improved scissors-type hinge joint structure steel bar N2 is placed into the hollow slab beam hinge joint, when the hinge joint longitudinal steel bar N1 in the middle of the third steel bar member touches the bottom of the hinge joint, under the resistance of the hinge joint bottom, the folded third steel bar member is opened, making the included angle between the first rod body 1 and the second rod body 2 180°, while the third rod body 6 and the fifth rod body 8 move away from each other, and the "T" type structure becomes a scissors-type "X" structure. At this time, the placement of the modified scissors-type hinge joint structure steel bar N2 is completed.

[0072] Step S107: Bind and connect the upper ends of the third rod body 6 and the fifth rod body 8 with the pre-buried inverted plate steel bars at the top of the two side hollow slab beams.

[0073] Specifically, the several reconstructed scissors type hinge joint construction steels N2 arranged equidistantly along the hinge joint longitudinal direction are sequentially bound and connected with the pre-buried inverted plate steels N3 at the top of the two side hollow slab beams, and when the binding and connection is performed, the pre-buried inverted plate steels N3 at the top of the two side hollow slab beams are respectively bound on the bent portions of the upper ends of the third rod bodies 6 and the fifth rod bodies 8 of each scissors type hinge joint construction steel N2, so that the connection stability of the scissors type hinge joint construction steel N2 and the pre-buried inverted plate steel N3 can be ensured.

[0074] Therefore, the technical scheme of the present application does not change the construction form of the conventional hinge joint steel, only optimizes the hinge joint steel on the basis, facilitates the installation construction of the hinge joint steel on site, improves the installation precision of the hinge joint steel, and can achieve popularization and use.

[0075] In addition to the above-mentioned embodiments, the present application can also have other implementation manners; any technical scheme formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present application.

Claims

1. A pin hinge shear type steel bar for hinge joint of a hollow slab beam bridge, characterized in that: Comprise: ​ First steel bar member; Second steel bar member; And third steel bar member, comprising first rod body (1) and second rod body (2) with end interlinked; Wherein, the middle part of the first steel bar member and the second steel bar member are interlinked, and the lower end of the first steel bar member and the second steel bar member are respectively hinged with the end of the first rod body (1) and the end of the second rod body (2); The middle part of the first steel bar member and the second steel bar member are hinged by first pin hinge assembly (3), and the first pin hinge assembly (3) comprises first connecting piece (4) and second connecting piece (5) with middle part interlinked; The first steel bar member comprises third rod body (6) and fourth rod body (7), and the second steel bar member comprises fifth rod body (8) and sixth rod body (9), one end of the third rod body (6) and the fourth rod body (7) is respectively fixedly connected at both ends of the second connecting piece (5), one end of the fifth rod body (8) and the sixth rod body (9) is respectively fixedly connected at both ends of the first connecting piece (4), the lower end of the fourth rod body (7) is hinged with the end of the first rod body (1), and the lower end of the sixth rod body (9) is hinged with the end of the second rod body (2); The lower end of the fourth rod body (7) and the end of the first rod body (1), the lower end of the sixth rod body (9) and the end of the second rod body (2), and the first rod body (1) and the second rod body (2) are all hinged by second pin hinge assembly (10), and the second pin hinge assembly (10) comprises third connecting piece (11) and fourth connecting piece (12) with end interlinked.

2. The pin hinge shear type steel bar for hinge joint of hollow slab beam bridge according to claim 1, characterized in that: The first connecting piece (4) comprises first ear plate (13), and the middle part of the first ear plate (13) is provided with first hinge hole (14); The second connecting piece (5) comprises first ear seat (15), one end of the first ear seat (15) is provided with insertion slot (16) for the first ear plate (13) to extend into, the middle part of the first ear seat (15) is provided with second hinge hole (17), and when the first ear plate (13) extends into the insertion slot (16), the second hinge hole (17) is aligned with the first hinge hole (14).

3. The pin hinge shear steel bar for hinge joint of hollow slab beam bridge according to claim 2, characterized in that: Both ends of the first ear plate (13) are fixedly provided with first connecting rod (18), both ends of the first ear seat (15) are detachably provided with second connecting rod (19), and the first connecting rod (18) and the second connecting rod (19) are both provided with threaded hole (20); The end of the third rod body (6) and the fourth rod body (7) connected with the second connecting piece (5) and the end of the fifth rod body (8) and the sixth rod body (9) connected with the first connecting piece (4) are all provided with external threads.

4. The pin hinge shear steel bar for hinge joint of hollow slab beam bridge according to claim 3, characterized in that: The third connecting piece (11) comprises second ear plate (21), and one end of the second ear plate (21) is provided with third hinge hole (22) The fourth connecting piece (12) comprises a second lug seat (23), one end of the second lug seat (23) is provided with a slot (16) for the second lug plate (21) to extend into, one end of the second lug seat (23) provided with the slot (16) is provided with a fourth hinge hole (24), and when the second lug plate (21) extends into the slot (16), the fourth hinge hole (24) is aligned with the third hinge hole (22).

5. The pin hinge shear steel bar for hinge joint of hollow slab beam bridge according to claim 4, characterized in that: The other end of the second lug plate (21) and the second lug seat (23) is fixedly provided with a third connecting rod (25), and the third connecting rod (25) is provided with a threaded hole (20) therein. The end of the fourth rod body (7), the sixth rod body (9), the first rod body (1) and the second rod body (2) connected with the second pin hinge assembly (10) is provided with an external thread.

6. The pin hinge shear steel bar for hinge joint of hollow slab beam bridge according to claim 5, characterized in that: The end of the third rod body (6) and the fifth rod body (8) away from the first pin hinge assembly (3) is provided with a bending part (26).

7. A method for installing pin-hinged scissors-type reinforcement for hinge joints of hollow slab beam bridges, based on the pin-hinged scissors-type reinforcement for hinge joints of hollow slab beam bridges according to claim 6, characterized in that: Comprise: Connect the first rod body (1), the second rod body (2) and the second pin hinge assembly (10) to form a third steel bar piece, then arrange a plurality of third steel bar pieces along the longitudinal direction of the hinge joint in sequence at equal intervals, and pass the hinge joint longitudinal steel through the third hinge hole (22) and the fourth hinge hole (24) in the second pin hinge assembly (10) in a plurality of third steel bar pieces to form a fishbone-shaped arrangement; Connect the two ends of the third steel bar piece with the third connecting piece (11) in the second pin hinge assembly (10) respectively, then insert the second lug plate (21) of the third connecting piece (11) into the second lug seat (23) of the fourth connecting piece (12) in the second pin hinge assembly (10), align the hinge holes, pass the hinge joint longitudinal steel through the hinge holes of the second pin hinge assembly (10), and then through the third steel bar pieces arranged at equal intervals in the longitudinal direction, so that the fishbone-shaped arrangement forms a net-shaped arrangement; On the basis of the net-shaped arrangement, install the first connecting piece (4) and the second connecting piece (5) in the first pin hinge assembly (3) to ensure that the hinge holes are aligned, then connect one end of the fourth rod body (7) of the first steel bar piece with the fourth connecting piece (12) of the second pin hinge assembly (10) and the other end with the second connecting piece (5) of the first pin hinge assembly (3), connect one end of the sixth rod body (9) of the second steel bar piece with the fourth connecting piece (12) of the second pin hinge assembly (10) and the other end with the first connecting piece (4) of the first pin hinge assembly (3), and finally pass the hinge joint longitudinal steel through the hinge holes of the first pin hinge assembly (3) and then through the first pin hinge assemblies (3) arranged at equal intervals in the longitudinal direction, so that the net-shaped arrangement forms a triangular steel cage arrangement which can be stably placed on the bridge deck; On the basis of the triangular steel cage, connect the third rod body (6) of the first steel bar piece and the fifth rod body (8) of the second steel bar piece with the second connecting piece (5) and the first connecting piece (4) of the first pin hinge assembly (3) respectively, and finally form the hinge joint steel structure arrangement. Lifting the hinge joint longitudinal steel in the first pin hinge assembly (3), under the weight of the steel, the second pin hinge assembly (10) in the middle of the third steel bar rotates and folds down, reducing the bottom width of the scissors type hinge construction steel, while the third bar (6) and the fifth bar (8) are close to each other, so that the scissors type hinge construction steel of the transformed "X" structure forms the scissors type hinge construction steel of "T" structure, and then the hinge construction steel is put into the hinge; The hinge steel is put into the hollow slab beam hinge, and when the hinge longitudinal steel in the middle of the third steel bar touches the bottom of the hinge, the folded third steel bar is unfolded under the support of the hinge bottom, so that the included angle between the first bar (1) and the second bar (2) is 180°, and at the same time, the third bar (6) and the fifth bar (8) are away from each other, so that the scissors type hinge construction steel of "T" structure forms the scissors type hinge construction steel of "X" structure; The upper end bending part (26) of the third bar (6) and the fifth bar (8) is connected with the pre-buried bent steel on both sides of the top of the hollow slab beam by binding.

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