A construction platform and construction method for high pier or cable tower crossbeams

Abstract

This invention provides a construction platform and method for a high pier or cable tower crossbeam. The construction platform includes two pre-embedded bracket assemblies and a K-type support. The two pre-embedded bracket assemblies are respectively installed on the high piers or cable towers at both ends of the crossbeam to be constructed. Each pre-embedded bracket assembly includes a first pre-embedded bracket and a second pre-embedded bracket located above the first pre-embedded bracket. The K-type support includes a transverse rod, two diagonal rods, and several reinforcing rods. The opposite ends of the transverse rod are supported on the second pre-embedded bracket by a drop beam, which is fixed to the second pre-embedded bracket. The drop beam extends longitudinally along the bridge and at least one end extends to the outside of the high pier or cable tower. The two diagonal rods are respectively located at the opposite ends of the transverse rod. One end of each diagonal rod is fixed to the transverse rod, and the other ends of each diagonal rod extend toward the opposite ends of the transverse rod and are respectively fixed to the first pre-embedded bracket of the two pre-embedded bracket assemblies. The reinforcing rods are fixedly connected to the transverse rod and the diagonal rods. This facilitates the installation and dismantling of the K-type support.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge engineering, in particular to a high-pier or cable-tower beam construction platform and a construction method. BACKGROUND

[0002] Most high-pier or cable-tower beam construction platforms adopt steel truss, and during construction, the opposite ends of the steel truss are fixed to the high piers or cable towers at the two ends of the beam to be constructed through pre-embedded corbels, and then a distribution beam is built on the steel truss, a formwork is built on the distribution beam, and concrete is poured to complete the construction of the beam.

[0003] During the construction of the beam, the steel truss needs to be hoisted to the pre-embedded corbels in the air for installation, and after the construction of the beam is completed, the disassembled steel truss needs to be hoisted from the pre-embedded corbels to the ground to complete the disassembly of the construction platform. Since the high pier or cable tower has a certain length in the longitudinal direction of the bridge, multiple steel trusses are usually built along the longitudinal direction of the bridge. Due to the limitation of the high piers or cable towers at the two ends of the beam, the working area between the high piers or cable towers is small, making it difficult to hoist the steel truss installed in the middle of the two high piers or the middle of the two cable towers. In the prior art, a dismounting and hoisting hole or a dismounting pre-embedded part is reserved in the main body of the beam during construction to assist the hoisting of the steel truss, which makes the dismounting process of the steel truss complex and dangerous, and the reservation of the dismounting and hoisting hole in the main body of the beam will damage the structure of the beam and reduce the design strength of the beam. SUMMARY

[0004] The present application aims to solve at least one of the technical problems raised in the background, and provides a high-pier or cable-tower beam construction platform with a convenient support assembly and disassembly.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0006] A high-pier or cable-tower beam construction platform, comprising two pre-embedded corbel assemblies and a K-shaped support, the two pre-embedded corbel assemblies are respectively arranged on the high piers or cable towers at the two ends of the beam to be constructed, each pre-embedded corbel assembly comprises a first pre-embedded corbel and a second pre-embedded corbel arranged above the first pre-embedded corbel, the K-shaped support comprises a horizontal rod, two inclined rods and a plurality of reinforcing rods, the opposite ends of the horizontal rod are respectively supported on the second pre-embedded corbel through a dismounting beam, the dismounting beam is fixed to the second pre-embedded corbel, the dismounting beam extends along the longitudinal direction of the bridge and at least one end extends to the outside of the high pier or cable tower; the two inclined rods are respectively arranged at the opposite ends of the horizontal rod, one end of each inclined rod is fixed to the horizontal rod, and the other end of each inclined rod extends towards the opposite end of the horizontal rod and is fixed to the first pre-embedded corbel of the pre-embedded corbel assembly; the reinforcing rods are fixedly connected to the horizontal rod and the inclined rods.

[0007] Further, the first pre-embedded bracket, the second pre-embedded bracket and the K-shaped support are provided with a plurality of longitudinal bridges, and the K-shaped support is connected with the first pre-embedded bracket and the second pre-embedded bracket; the transverse rod, the oblique rod and at least part of the reinforcing rod of adjacent two K-shaped supports are fixedly connected by a plurality of connecting rods.

[0008] Further, the first pre-embedded bracket and the second pre-embedded bracket each comprise a pre-embedded box and an inserted steel plate, the pre-embedded box is used for pre-embedding on the corresponding side of the high pier or cable tower and is inserted into the gap of the steel bar in the cable tower or high pier, the first end of the inserted steel plate is inserted into the pre-embedded box, the second end of the inserted steel plate is located outside the pre-embedded box, and the second end of the inserted steel plate is fixed with a stiffened plate; the falling beam is fixed with the second end of the inserted steel plate in the second pre-embedded bracket; the other end of the oblique rod is fixed with the second end of the inserted steel plate in the first pre-embedded bracket.

[0009] Further, the number of the pre-embedded boxes is at least two, and one end of each pre-embedded box is provided with a socket; the first end of the inserted steel plate is inserted into the corresponding pre-embedded box through the socket.

[0010] Further, the inserted steel plate comprises at least two inserted legs and a connecting plate fixedly connected to the top of the at least two inserted legs, one end of the at least two inserted legs is inserted into the corresponding pre-embedded box through the corresponding socket, and the other end of the at least two inserted legs is located outside the pre-embedded box and is fixed with the stiffened plate; the connecting plate is located outside the pre-embedded box; the falling beam is fixed on the connecting plate of the corresponding inserted steel plate; one end of the oblique rod is fixed on the connecting plate of the corresponding inserted steel plate.

[0011] Further, the first pre-embedded bracket further comprises a hoop plate, one side of the hoop plate is used for pre-embedding on the high pier or cable tower at both ends of the to-be-constructed beam, at least two fixing openings are provided on the hoop plate, and one end of the pre-embedded box of the first pre-embedded bracket provided with the socket is fixed at the corresponding fixing opening, so that the hoop plate is connected to the outer periphery of the socket.

[0012] Further, the stiffened plates of the first pre-embedded bracket and the second pre-embedded bracket each comprise two groups of side rib plates and a connecting rib plate fixedly connected between adjacent two inserted legs, the two groups of side rib plates are respectively fixed on the two outermost inserted legs and are fixed on the side of the corresponding inserted leg away from the remaining inserted legs.

[0013] Further, the stiffened plate of the first pre-embedded bracket further comprises a lower pasting plate and a plurality of force transmission plates, which are all located outside the pre-embedded box, the lower pasting plate is fixed on the bottom of the at least two inserted legs of the first pre-embedded bracket; the plurality of force transmission plates are arranged below the lower pasting plate along a straight line and fixedly connect the hoop plate and the lower pasting plate.

[0014] The application also provides a construction method of a high pier or cable tower beam, comprising the following steps:

[0015] S1, erecting the high pier or cable tower beam construction platform, comprising the following steps:

[0016] S11, embedding two pre-embedded bracket assemblies on the high pier or cable tower at the two ends of the beam to be constructed;

[0017] S12, installing the unloading beam: fixing the unloading beam on the second pre-embedded bracket;

[0018] S13, installing the K-shaped support: hoisting the K-shaped support to the end of the unloading beam located outside the high pier or cable tower, supporting the opposite ends of the transverse rod of the K-shaped support on the unloading beam of the two pre-embedded bracket assemblies respectively, moving the K-shaped support along the unloading beam, and fixing the free ends of the two inclined rods of the K-shaped support on the first pre-embedded bracket of the two pre-embedded bracket assemblies when the K-shaped support is moved into position;

[0019] S2, installing the unloading device: installing a plurality of unloading devices on the top of the transverse rod of the K-shaped support;

[0020] S3, installing the distribution beam: installing the distribution beam on the plurality of unloading devices;

[0021] S4, installing the formwork: installing the formwork on the distribution beam, and pouring concrete on the formwork to form the beam;

[0022] S5, after the beam is completed, separating the inclined rods of the K-shaped support from the second pre-embedded bracket, then sliding the K-shaped support along the unloading beam to the outside of the high pier or cable tower, and hoisting the K-shaped support to the preset position.

[0023] Further, the first pre-embedded bracket and the second pre-embedded bracket each comprise a pre-embedded box and an inserted steel plate, the pre-embedded box is used for being pre-embedded on the corresponding side of the high pier or cable tower and being inserted into the gap of the steel bars in the cable tower or high pier, the first end of the inserted steel plate is inserted into the pre-embedded box, the second end of the inserted steel plate is located outside the pre-embedded box, and the second end of the inserted steel plate is fixed with a stiffened plate; step S11 comprises:

[0024] S111, when constructing the high pier or cable tower, pre-embedding the pre-embedded box of the first pre-embedded bracket and the pre-embedded box of the second pre-embedded bracket on the corresponding side of the high pier or cable tower and inserting them into the gap of the steel bars in the cable tower or high pier;

[0025] S112, installing the inserted steel plate: inserting the first end of the inserted steel plate into the pre-embedded box, and locating the second end of the inserted steel plate outside the pre-embedded box;

[0026] In step S12, the unloading beam is fixed to the second end of the steel plate inserted in the second pre-embedded bracket;

[0027] In step S13, the other end of the diagonal rod is fixed to the second end of the inner steel plate of the first pre-embedded bracket.

[0028] By adopting the above technical solution, the present invention has the following beneficial effects:

[0029] The aforementioned construction platform and method for the crossbeam of the high pier or pylon includes a drop beam fixed on the second pre-embedded bracket. The drop beam extends longitudinally along the bridge and at least one end extends to the outside of the high pier or pylon. When installing the K-type bracket, a crane can be used to lift the K-type bracket to the end of the drop beam located outside the high pier or pylon. Then, the K-type bracket is slid along the drop beam to the predetermined installation position. After the crossbeam is poured, the diagonal rod of the K-type bracket is separated from the inner steel plate. Then, the K-type bracket is slid along the drop beam to the outside of the high pier or pylon, and a crane is used to lift the K-type bracket to the preset position. This ensures that the lifting of the K-type bracket by the crane is carried out in the area outside the pylon or high pier, avoiding lifting in the small working area between the high pier or pylon. This makes the installation and dismantling of the K-type bracket more convenient. Compared with the conventional drop method, it avoids reserving drop holes in the main structure of the crossbeam, optimizes the installation and dismantling operation, and reduces the risk of installing and dismantling the bracket. Attached Figure Description

[0030] Figure 1 This is a front view structural schematic diagram of a high pier or cable tower beam construction platform according to a preferred embodiment of the present invention;

[0031] Figure 2 for Figure 1 A schematic diagram of the right-side structure of the construction platform for the high pier or cable tower beam shown.

[0032] Figure 3 for Figure 1 An enlarged view of the construction platform for the high pier or cable tower beam at point A;

[0033] Figure 4 for Figure 3 The diagram shows the right view of the structure of the first embedded bracket hoop plate and the embedded box.

[0034] Figure 5 for Figure 3 A schematic cross-sectional view of the first pre-embedded bracket along line II;

[0035] Figure 6 for Figure 3 The diagram shows a cross-sectional view of the first pre-embedded bracket along line II-II.

[0036] Figure 7 for Figure 1An enlarged view of the high pier or cable tower beam construction platform at B;

[0037] Figure 8 As Figure 7 A cross-sectional view of the second pre-embedded bracket along line III-III;

[0038] Figure 9 As Figure 7 A cross-sectional view of the second pre-embedded bracket along line IV-IV;

[0039] Figure 10 As Figure 1 A partial structural schematic view of the high pier or cable tower beam construction platform;

[0040] Figure 11 As Figure 10 A front structural schematic view of the K-shaped support in the high pier or cable tower beam construction platform;

[0041] Figure 12 As Figure 10 A cross-sectional structural schematic view of the K-shaped support along line D-D;

[0042] Figure 13 As Figure 10 A cross-sectional structural schematic view of the K-shaped support along line E-E;

[0043] Explanation of main element symbols

[0044] 10, pre-embedded bracket assembly; 11, first pre-embedded bracket; 13, second pre-embedded bracket; 140, pre-embedded box; 141, hoop plate; 142, fixing port; 144, insertion port; 145, connecting steel bar; 15, inner insertion steel plate; 151, insertion leg; 152, steel plate; 153, connecting plate; 16, stiffening plate; 161, side rib plate; 162, connecting rib plate; 163, vertical rib plate; 164, horizontal rib plate; 165, lower sticking plate; 166, force transmission plate; 20, K-shaped support; 21, transverse rod; 23, oblique rod; 25, reinforcing rod; 261, first connecting rod; 262, second connecting rod; 263, intermediate connecting rod; 264, side connecting rod; 265, third connecting rod; 30, unloading beam; 40, unloading device; 50, distribution beam; 200, high pier or cable tower; 300, densified steel mesh. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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 other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0046] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] Please see also Figure 1 and Figure 2 A preferred embodiment of the present invention provides a construction platform for a high pier or cable tower beam, including two pre-embedded bracket components 10 and a K-type bracket 20. The two pre-embedded bracket components 10 are respectively used to be installed on the high piers or cable towers 200 at both ends of the beam to be constructed, and the K-type bracket 20 is fixed on the two pre-embedded bracket components 10.

[0049] Please see also Figures 3 to 9 Each pre-embedded bracket assembly 10 includes a first pre-embedded bracket 11 and a second pre-embedded bracket 13 disposed above the first pre-embedded bracket 11. In this embodiment, multiple first pre-embedded brackets 11 and second pre-embedded brackets 13 are arranged along the longitudinal direction of the bridge, such as... Figure 2 As shown. Both the first embedded bracket 11 and the second embedded bracket 13 include an embedded box 140 and an inner steel plate 15 with one end inserted into the embedded box 140.

[0050] The embedded box 140 is used to be embedded in the high pier or cable tower 200 on the corresponding side and inserted into the gap of the steel bars (not shown in the figure) in the cable tower or high pier 200. One end of the embedded box 140 is provided with a socket 144. In the embodiment, the embedded box 140 of the first embedded bracket 11 and the second bracket 13 is provided with at least two, and the at least two embedded boxes 140 are distributed along the longitudinal bridge direction. The first embedded bracket 11 further comprises a hoop plate 141, which is used to be fixed on the steel bars in the cable tower or high pier and is embedded in the surface of the high pier or cable tower 200; in the embodiment, the hoop plate 141 is fixed on the steel bars in the cable tower or high pier 200 through the connecting steel bars 145. The hoop plate 141 is provided with at least two fixing openings 142, and in the embodiment, the at least two fixing openings 142 are arranged along the longitudinal bridge direction. The embedded box 140 of the first embedded bracket 11 is fixed on one side of the hoop plate 141, and the end of the embedded box 140 of the first embedded bracket 11 provided with the socket 144 is fixed on the inner wall of the corresponding fixing opening 142, so that the hoop plate 141 surrounds the periphery of the socket 144 of the embedded box 140.

[0051] The first end of the inserted steel plate 15 is inserted into the embedded box 140, the second end of the inserted steel plate 15 is located outside the embedded box 140, and the second end of the inserted steel plate 15 is fixed with the stiffening plate 16. In the embodiment, the first end of the inserted steel plate 15 is inserted into the corresponding embedded box 140 through the socket 144. The inserted steel plate 15 of the first embedded bracket 11 and the second embedded bracket 13 comprises at least two inserted legs 151 and a connecting plate 153 fixed on the top of the at least two inserted legs 151. Each inserted leg 151 comprises at least one steel plate 152, one end of the at least two inserted legs 151 is inserted into the corresponding embedded box 140 through the corresponding socket 144, and the other end of the at least two inserted legs 151 is located outside the embedded box 140 and is fixed with the stiffening plate 16. The connecting plate 153 is fixed on the top of the steel plates 152 of the at least two inserted legs 151 and is located outside the embedded box 140. In the embodiment, the number of steel plates 152 constituting the inserted leg 151 is two, the two steel plates 152 are arranged in a longitudinal bridge direction, and the first end of the two steel plates 152 is inserted into the corresponding embedded box 140 through the corresponding socket 144; the second end of the two steel plates 152 is located outside the embedded box 140 and is fixed with the stiffening plate 16.

[0052] In the embodiment, the stiffening plates 16 of the first pre-embedded bracket 11 and the second pre-embedded bracket 13 each include two groups of side edge rib plates 161 and a connecting rib plate 162 fixed between two adjacent legs 151. The two groups of side edge rib plates 161 are respectively fixed on the two outermost legs 151 and fixed on the side of the corresponding leg 151 away from the other legs 151. The side edge rib plates 161 of the first pre-embedded bracket 11 and the second pre-embedded bracket 13 each include at least one vertical rib plate 163 vertically arranged and fixed on the side of the corresponding leg 151. The side edge rib plates 161 of the first pre-embedded bracket 11 further include a plurality of horizontal rib plates 164 horizontally arranged and spaced apart in the vertical direction, the plurality of horizontal rib plates 164 are respectively arranged between two adjacent vertical rib plates 163 and fixed on the sides of the two adjacent vertical rib plates 163 and the corresponding leg 151. In the embodiment, the stiffening plate 16 of the first pre-embedded bracket 11 further includes a lower pasting plate 165 and a plurality of force transmission plates 166, both of which are located outside the pre-embedded box 140. The lower pasting plate 165 is fixed on the bottom of at least two legs 151 of the first pre-embedded bracket 11. The plurality of force transmission plates 166 are arranged below the lower pasting plate 165 in the longitudinal direction and fixedly connected to the hoop plate 141 and the lower pasting plate 165.

[0053] Preferably, the length of the first end of the inner steel plate 15 inserted into the pre-embedded box 140 is not less than the length of the second end of the inner steel plate 15 located outside the pre-embedded box 140, so as to avoid excessive force concentration on the first pre-embedded bracket 11 and the second pre-embedded bracket 13, which is not conducive to the high pier or the tower 200. In the embodiment, to prevent excessive force concentration on the high pier or the tower 200 at the pre-embedded bracket, a dense steel mesh 300 is pre-embedded around the pre-embedded bracket in the high pier or the tower 200. In addition, when the first pre-embedded bracket 11 or the second pre-embedded bracket 13 is used to support other supports, and if the supported support has a pulling force at the pre-embedded bracket, if the length of the first end of the inner steel plate 15 inserted into the pre-embedded box 140 is too small, the inner steel plate 15 may be pulled out. Preferably, the width w of the pre-embedded box 140 is not greater than 10 cm, so that it can be arranged in the steel reinforcement gap in the high pier or the tower 200.

[0054] In the embodiment, a plurality of K-shaped supports 20 are arranged in the longitudinal direction of the bridge, and the K-shaped supports 20 are connected with the corresponding first pre-embedded bracket 11 and the second pre-embedded bracket 13. Please see Figures 10 to 13, the K-shaped support 20 comprises a transverse rod 21, two inclined rods 23 and a plurality of reinforcing rods 25. The opposite ends of the transverse rod 21 are respectively supported on the second embedded corbel 13 through a dismounting beam 30. Specifically, the dismounting beam 30 is fixed with the connecting plate 153 on the second end of the embedded steel plate 15 in the second embedded corbel 13. The dismounting beam 30 extends along the longitudinal direction of the bridge and at least one end extends to the outside of the high pier or cable tower 200. In the embodiment, the dismounting beam 30 is formed by welding at least two I-shaped steel. The opposite ends of the dismounting beam 30 extend to the outside of the high pier or cable tower 200. The opposite ends of the transverse rod 21 are respectively supported on the dismounting beam 30 at the top of the two embedded corbel assemblies 10. The transverse rod 21 and the dismounting beam 30 are detachable. The two inclined rods 23 are respectively arranged at the opposite ends of the transverse rod 21. One end of the two inclined rods 23 is fixed with the transverse rod 21. The other end of the two inclined rods 23 respectively extends towards the opposite ends of the transverse rod 21 and is respectively fixed on the second end of the first embedded corbel 11 in the two embedded corbel assemblies 10 by welding or other methods. In the embodiment, the other end of the inclined rod 23 is fixed on the connecting plate 153 on the second end of the embedded steel plate 15 in the first embedded corbel 11. The reinforcing rods 25 are fixedly connected with the transverse rod 21 and the inclined rod 23. In the embodiment, two reinforcing rods 25 are fixed on each inclined rod 23. One end of the two reinforcing rods 25 is fixed at the substantially middle position of the corresponding inclined rod 23. The other end of the two reinforcing rods 25 is arranged along the length direction of the transverse rod 21 and is fixed with the transverse rod 21. The arrangement of the reinforcing rods 25 can improve the overall strength of the K-shaped support 20.

[0055] In the embodiment, the transverse rod 21, the inclined rod 23 and at least part of the reinforcing rods 25 of the adjacent two K-shaped supports 20 are fixedly connected together through a plurality of connecting rods (not shown) to further improve the overall strength of the high pier or cable tower beam construction platform. In the embodiment, the connecting rods include a first connecting rod 261 ( Figure 2 ), a second connecting rod 262 and a third connecting rod 265. The first connecting rod 261 is fixedly connected with the transverse rods 21 of a plurality of K-shaped supports 20. The second connecting rod 262 is fixedly connected with the inclined rods 23 of a plurality of K-shaped supports 20. In the embodiment, the second connecting rod 262 comprises a middle connecting rod 263 and two side edge connecting rods 264. The middle connecting rod 263 is fixedly connected with the substantially middle position of the inclined rod 23 in the adjacent K-shaped supports 20. The two side edge connecting rods 264 are respectively arranged on the opposite sides of the middle connecting rod 263. The two side edge connecting rods 264 are respectively fixed with the inclined rods 23 in a plurality of K-shaped supports 20. Each side edge connecting rod 264 is substantially a V-shaped rod member concave towards the middle connecting rod 263. The reinforcing rods 25 closer to the second embedded corbel 13 in the adjacent two K-shaped supports 20 are fixedly connected together through a plurality of third connecting rods 265. The plurality of third connecting rods 265 are arranged in a substantially wave shape along the longitudinal direction of the bridge.

[0056] The embodiment of the present application also provides a high pier or cable tower beam construction method, comprising the following steps:

[0057] S1, the high pier or cable tower beam construction platform is built, comprising the following steps:

[0058] S11, two embedded bracket assemblies 10 are embedded on the high pier or cable tower 200 at the two ends of the beam to be constructed respectively; in the embodiment, step S11 comprises:

[0059] S111, when the high pier or cable tower 200 is constructed, the embedded box 140 and the hoop plate 141 of the first embedded bracket 11 and the embedded box 140 of the second embedded bracket 13 are fixed with the steel bars inside the high pier or cable tower 200, the embedded box 140 is inserted into the gap of the steel bars inside the high pier or cable tower 200; when the high pier or cable tower 200 is constructed by pouring concrete, one side of the embedded box 140 and the hoop plate 141 is embedded in the corresponding side of the high pier or cable tower 200, and the spigot 144 of the embedded box 140 is exposed outside the high pier or cable tower 200 to facilitate the insertion of the inner insertion steel plate 15;

[0060] S112, the installation of the inner insertion steel plate 15: the first end of the inner insertion steel plate 15 is inserted into the embedded box 140, the second end of the inner insertion steel plate 15 is located outside the embedded box 140, and the second end of the inner insertion steel plate 15 is fixed with the stiffening plate 16.

[0061] S12, the installation of the unloading beam 30: the unloading beam 30 is fixed on the second embedded bracket 13; in the embodiment, the unloading beam 30 is fixed with the connecting plate 153 on the second end of the inner insertion steel plate 15 in the second embedded bracket 13.

[0062] S13, the installation of the K-shaped support 20: the K-shaped support 20 is hoisted to the end of the unloading beam 30 located outside the high pier or cable tower 200, the opposite ends of the transverse rod 21 of the K-shaped support 20 are supported on the unloading beam 30 of the second embedded bracket 13 in the two embedded bracket assemblies 10 respectively, the K-shaped support 20 is moved along the unloading beam 30, and the free ends of the two inclined rods 23 of the K-shaped support 20 are fixed on the connecting plate 153 of the first embedded bracket 11 in the two embedded bracket assemblies 10 respectively after the K-shaped support 20 is moved into position; in the embodiment, after a plurality of K-shaped supports 20 are moved into position, the plurality of K-shaped supports 20 are fixed and connected together through the connecting rod 26.

[0063] S2, the installation of the unloading device 40: a plurality of unloading devices 40 are installed on the top of the transverse rod 21 of the K-shaped support 20.

[0064] S3, the installation of the distribution beam 50: the distribution beam 50 is installed on the plurality of unloading devices 40.

[0065] S4: Template installation: install the template (not shown in the figure) on the distribution beam 50, and pour concrete on the template to form the cross beam.

[0066] The function of the unloading device 40 is to facilitate the leveling and unloading of the template support, i.e. the installation of the distribution beam 50, in the cross beam construction process of the bridge engineering. The structure of the unloading device 40 in the embodiment can adopt the unloading device in the prior art, for example, the self-made wedge-shaped unloading device disclosed in the Chinese utility model patent with the application number 202020952667.2. The steps S2-S4 in the embodiment belong to the prior art, and for the sake of brevity, they will not be described here.

[0067] S5: After the cross beam is completed, the inclined rod 23 of the K-shaped support 20 is separated from the inner insertion steel plate 15, for example, the inclined rod 23 can be separated from the inner insertion steel plate 15 by cutting or the like, and then the K-shaped support 20 is slid along the unloading beam 30 to the outside of the high pier or cable tower 200, and then the K-shaped support 20 is hoisted to the ground or other predetermined position.

[0068] The above-mentioned high pier or cable tower cross beam construction platform and construction method has the unloading beam 30 fixed on the second pre-buried corbel 13, the unloading beam 30 extends along the longitudinal direction of the bridge and at least one end extends to the outside of the high pier or cable tower 200. When installing the K-shaped support 20, the K-shaped support 20 can be first hoisted to the end of the unloading beam 30 located outside the high pier or cable tower 200 by using a crane or the like, and then the K-shaped support 20 is slid along the unloading beam 30 to the predetermined installation position. After the cross beam is completed, the inclined rod 23 of the K-shaped support 20 is separated from the inner insertion steel plate 15, and then the K-shaped support 20 is slid along the unloading beam 30 to the outside of the high pier or cable tower 200, and then the K-shaped support 20 is hoisted to the predetermined position by using a crane or the like. Therefore, the hoisting of the K-shaped support 20 by the crane or the like is carried out in the area outside the cable tower or high pier 200, avoiding hoisting in the smaller working area between the high pier or cable tower 200, making the installation and removal process of the K-shaped support 20 more convenient, and compared with the conventional unloading method, avoiding reserving unloading holes in the main structure of the cross beam, optimizing the installation and removal operation, and reducing the risk of installing and removing the support.

[0069] The high pier or cable tower beam construction platform and construction method, the K-shaped support 20 is used instead of the steel truss in the prior art, the transverse rod 21 of the K-shaped support 20 is supported on the second pre-buried bracket 13, the inclined rod 23 of the K-shaped support 20 is supported on the first pre-buried bracket 11, the K-shaped support 20 is supported by the first pre-buried bracket 11 and the second pre-buried bracket 13 at the same time, the vertical load generated during beam pouring can be dispersed, the stress at the pre-buried bracket is avoided to be too large, the stress of the construction platform is more reasonable, the deformation of the K-shaped support 20 is less than that of the ordinary truss support, and the risk of pouring construction cracks caused by the deflection of the beam pouring concrete is reduced.

[0070] The high pier or cable tower beam construction platform and construction method, the two pre-buried brackets, i.e., the first pre-buried bracket 11 and the second pre-buried bracket 13, are arranged in the height direction to support the K-shaped support 20, the stress at the pre-buried bracket is avoided to be too large, and the number of pre-buried brackets used is reasonable: if three or more pre-buried brackets are arranged in the height direction to support the support, the difficulty of pre-buried accuracy of the pre-buried bracket is increased.

[0071] The pre-buried bracket in the prior art is usually a component with a square frame-shaped cross section formed by welding a steel plate. The pre-buried bracket functions to transmit the vertical load during beam construction. In order to improve the support force of the pre-buried bracket and prevent the pre-buried bracket from falling off under stress, one end of the pre-buried bracket is usually inserted into the concrete of the high pier or cable tower 200 during installation of the pre-buried bracket. Because the concrete volume is large during beam pouring, the pre-buried bracket as a support component bears a large load during construction. Therefore, the shear performance requirement of the pre-buried bracket for the beam construction platform is high. In order to improve the shear performance of the pre-buried bracket, the cross-sectional area of one end of the pre-buried bracket embedded in the concrete structure is usually large in the prior art, and a tensioning screw rod needs to be arranged. For example, a prefabricated steel bracket disclosed in a Chinese utility model patent with the publication number CN201095811Y. However, the cross-sectional area of the pre-buried bracket used in most beam construction platforms in the prior art is usually large, and part of the main reinforcement in the high pier or cable tower 200 needs to be cut off during pre-buried installation in the high pier or cable tower 200, which causes great damage to the main reinforcement of the high pier and the cable tower, and causes damage to the design strength of the high pier or cable tower 200 structure, resulting in a decrease in the design strength of the high pier or cable tower 200.

[0072] The first pre-buried bracket 11 and the second pre-buried bracket 13 each include a pre-buried box 140 and an inserted steel plate 15. The pre-buried box 140 can be pre-buried on the corresponding side of the high pier or the cable tower 200 and inserted into the gap of the steel bars in the cable tower or the high pier 200, thereby avoiding conflict with the main steel bars of the high pier or the cable tower. Compared with the pre-buried bracket in the prior art, the pre-buried bracket does not need to cut the main steel bars in the cable tower or the high pier during installation, thereby avoiding local damage to the cable tower or the high pier and ensuring the design strength of the high pier and the cable tower. The inserted steel plate 15 is connected to the pre-buried box 140 in a plug-in manner. After the construction of the cross beam is completed, the inserted steel plate 15 can be taken out of the pre-buried box 140 for reuse, thereby saving production costs.

[0073] The high pier or cable tower cross beam construction platform and the construction method convert part of the vertical pressure generated during pouring of the cross beam into horizontal thrust towards the side of the high pier or the cable tower through the K-shaped support 20 and the inclined rod 23. During use, the horizontal thrust pushes the inserted steel plate 15 against the corresponding pre-buried box 140, thereby preventing the inserted steel plate 15 from being separated from the pre-buried box 140. The stiffener plate 16 locally strengthens the inserted steel plate 15, thereby making the force more reasonable and improving the shear resistance of the pre-buried bracket. The cross-sectional area of the pre-buried bracket at one end of the pre-buried bracket in the concrete structure, i.e., the cross-sectional area of each pre-buried box 140, is reduced, and the shear resistance meets the requirements. The pre-buried bracket does not need to use a tension screw to provide support for the pre-buried bracket, thereby making the construction more convenient. During construction, the pre-buried bracket does not need to reserve a tension hole for the tension screw to pass through in the high pier or the cable tower 200, thereby not damaging the structure of the high pier or the cable tower 200 and ensuring the design strength of the high pier or the cable tower 200.

[0074] The construction platform of the embodiment is used for concrete pouring construction of the cross beam. Since the first embedded corbel 11 shares a larger force range than the second embedded corbel 13 during the concrete pouring of the cross beam, the stress at the first embedded corbel 11 is greater than that at the second embedded corbel 13. In the embodiment, the stiffening plates 16 on the first embedded corbel 11 and the second embedded corbel 13 are different in structure due to the different stresses. For the second embedded corbel 13 with smaller stress, only vertical rib plates 163 are arranged thereon to prevent local instability of the second embedded corbel 13, which can meet the use requirement, has a simpler structure, requires less steel material, and is beneficial to cost reduction. For the first embedded corbel 11 with greater stress, a hoop plate 141 is further arranged, which is fixedly connected to the periphery of the socket 144 of the embedded box 140. The hoop plate 141 can not only connect at least two embedded boxes 140 together, but also optimize the force transmission of the inserted leg 151 to the hoop plate 141 to prevent cracking of the contact part between the corbel and the concrete of the high pier or cable tower 200. The stiffening plate 16 of the first embedded corbel 11 includes horizontal rib plates 164 and vertical rib plates 163. The horizontal rib plates 164 can prevent the overall instability of the embedded corbel, and the vertical rib plates 163 can prevent the local instability of the embedded corbel, thereby improving the stability of the first embedded corbel 11. Meanwhile, the bottom of at least two inserted legs 151 of the first embedded corbel 11 is further fixed with a lower sticking plate 165. The arrangement of the lower sticking plate 165 can strengthen the integrity of the inner inserted steel plate 15 to form an overall force transmission structure. The force transmission plate 166 connects the inserted leg 151 of the inner inserted steel plate 15 and the hoop plate 141, which can optimize the force transmission of the inner inserted steel plate 15 to the hoop plate 141 to further reduce stress concentration.

[0075] The high pier or cable tower cross beam construction platform and the construction method adopt the K-shaped support 20 instead of the steel truss of the prior art. Compared with the steel truss of the prior art, the K-shaped support 20 of the embodiment has a simpler structure, is easier to assemble and disassemble, has fewer welding nodes, has a lower difficulty in welding quality control, requires less steel material for manufacturing, and can further save costs.

[0076] The first embedded corbel 11, the second embedded corbel 13, and the K-shaped support 20 of the high pier or cable tower cross beam construction platform and the construction method can be welded and assembled on a factory to realize assembly construction, guarantee the processing quality of the key structure and the welding quality of the key part, greatly reduce high-altitude operation, reduce high-altitude quality and safety risks, and accelerate the construction progress.

[0077] The above description is a detailed description of the preferred and feasible embodiments of the application, but the embodiments are not used to limit the scope of the patent application of the application. Any equivalent changes or modifications made under the technical spirit of the application should belong to the patent scope covered by the application.

Claims

1. A high pier or pylon beam construction platform, characterized in that, The application relates to a K-shaped support structure for a constructional beam, which comprises two embedded bracket assemblies and a K-shaped support, the two embedded bracket assemblies are respectively arranged on high piers or cable pylons at two ends of a to-be-constructed beam, each embedded bracket assembly comprises a first embedded bracket and a second embedded bracket arranged above the first embedded bracket, the K-shaped support comprises a horizontal rod, two inclined rods and a plurality of reinforcing rods, opposite ends of the horizontal rod are respectively supported on the second embedded bracket through a falling-off beam, the falling-off beam is fixed with the second embedded bracket, the falling-off beam extends along the longitudinal direction of the bridge and at least one end extends to the outside of the high pier or the cable pylon, the two inclined rods are respectively arranged at opposite ends of the horizontal rod, one end of each inclined rod is fixed with the horizontal rod, the other end of each inclined rod extends towards the opposite end of the horizontal rod and is fixed on the first embedded bracket of the corresponding embedded bracket assembly, and the reinforcing rods are fixedly connected with the horizontal rod and the inclined rods.

2. The high pier or pylon beam construction platform of claim 1, wherein, A plurality of the first embedded brackets, the second embedded brackets and the K-shaped supports are arranged along the longitudinal direction of the bridge, and the K-shaped supports are connected with the corresponding first embedded brackets and second embedded brackets, and the horizontal rods, the inclined rods and at least part of the reinforcing rods of adjacent two K-shaped supports are fixedly connected together through a plurality of connecting rods.

3. The high pier or pylon beam construction platform of claim 1, wherein, The first embedded bracket and the second embedded bracket each comprise an embedded box and an inserted steel plate, the embedded box is used for being embedded on the corresponding high pier or cable pylon and being inserted into the gap of the steel bars in the cable pylon or high pier, the first end of the inserted steel plate is inserted into the embedded box, the second end of the inserted steel plate is located outside the embedded box, a stiffening plate is fixed on the second end of the inserted steel plate, the falling-off beam is fixed with the second end of the inserted steel plate in the second embedded bracket, and the other end of the inclined rod is fixed with the second end of the inserted steel plate in the first embedded bracket.

4. The high pier or pylon beam construction platform of claim 3, wherein, The number of the embedded boxes is at least two, and one end of each embedded box is provided with a socket, and the first end of the inserted steel plate is inserted into the corresponding embedded box through the socket.

5. The high pier or pylon beam construction platform of claim 4, wherein, The inserted steel plate comprises at least two inserted legs and a connecting plate fixedly connected to the top of the at least two inserted legs, one end of each inserted leg is inserted into the corresponding embedded box through the corresponding socket, the other end of each inserted leg is located outside the embedded box and is fixed with the stiffening plate, the connecting plate is located outside the embedded box, the falling-off beam is fixed on the connecting plate of the corresponding inserted steel plate, and one end of the inclined rod is fixed on the connecting plate of the corresponding inserted steel plate.

6. The high pier or pylon beam construction platform of claim 5, wherein, The first embedded bracket further comprises a hoop plate, one side of the hoop plate is used for being embedded on the high pier or cable pylon at two ends of the to-be-constructed beam, at least two fixing openings are formed in the hoop plate, and the end of the embedded box of the first embedded bracket provided with the socket is fixed at the corresponding fixing opening, so that the hoop plate is connected to the outer periphery of the socket in a surrounding manner.

7. The high pier or pylon beam construction platform of claim 6, wherein, The stiffening plates of the first embedded bracket and the second embedded bracket each comprise two groups of side edge rib plates and a connecting rib plate fixedly connected between adjacent two inserted legs, the two groups of side edge rib plates are respectively fixed on the two outermost inserted legs and are fixed on the side surfaces of the corresponding inserted legs away from the remaining inserted legs.

8. The high pier or pylon beam construction platform according to claim 7, wherein, The stiffened plate of the first pre-embedded bracket further comprises a lower plate and a plurality of force transmission plates, the lower plate is fixed to the bottom of at least two legs of the first pre-embedded bracket, and the plurality of force transmission plates are arranged below the lower plate in a straight line and fixedly connected to the hoop plate and the lower plate.

9. A method of constructing a high pier or pylon beam, characterized by, The method comprises the following steps: S1, erecting the high pier or cable-stayed tower beam construction platform according to claim 1, which comprises the following steps: S11: embedding two pre-embedded bracket assemblies on the high pier or cable-stayed tower at the two ends of the beam to be constructed; S12: installing the landing beam: fixing the landing beam to the second pre-embedded bracket; S13: installing the K-shaped support: hoisting the K-shaped support to the end of the landing beam outside the high pier or cable-stayed tower, supporting the opposite ends of the transverse rod of the K-shaped support on the landing beams of the two pre-embedded bracket assemblies, moving the K-shaped support along the landing beam, and fixing the free ends of the inclined rods of the K-shaped support to the first pre-embedded brackets of the two pre-embedded bracket assemblies when the K-shaped support is in place; S2: installing the landing device: installing a plurality of landing devices on the top of the transverse rod of the K-shaped support; S3: installing the distribution beam: installing the distribution beam on the plurality of landing devices; S4: installing the formwork: installing the formwork on the distribution beam and pouring concrete on the formwork to form the beam; S5: after the beam is completed, separating the inclined rods of the K-shaped support from the second pre-embedded bracket, then sliding the K-shaped support to the outside of the high pier or cable-stayed tower along the landing beam, and hoisting the K-shaped support to the preset position.

10. The method of claim 9, wherein the method further comprises: The first pre-embedded bracket and the second pre-embedded bracket each comprise a pre-embedded box and an inserted steel plate, the pre-embedded box is used for pre-embedding on the corresponding side of the high pier or cable-stayed tower and penetrating into the gap of the steel bars in the cable-stayed tower or high pier, the first end of the inserted steel plate is inserted into the pre-embedded box, the second end of the inserted steel plate is located outside the pre-embedded box, and the second end of the inserted steel plate is fixed with a stiffened plate; step S11 comprises: S111: when constructing the high pier or cable-stayed tower, pre-embedding the pre-embedded boxes of the first pre-embedded bracket and the second pre-embedded bracket on the corresponding side of the high pier or cable-stayed tower and penetrating into the gap of the steel bars in the cable-stayed tower or high pier; S112: installing the inserted steel plate: inserting the first end of the inserted steel plate into the pre-embedded box, and locating the second end of the inserted steel plate outside the pre-embedded box; In step S12, the landing beam is fixed with the second end of the inserted steel plate in the second pre-embedded bracket, and in step S13, the other end of the inclined rod is fixed to the second end of the inserted steel plate of the first pre-embedded bracket.

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