Connecting structure for front and rear lower cross beam trusses of rear fulcrum hanging basket of ultra-wide and variable-width PC cable-stayed bridge

Abstract

The utility model discloses a connecting structure for a front lower cross beam truss and a rear lower cross beam truss of a rear fulcrum hanging basket of an ultra-wide and variable-width PC cable-stayed bridge. Comprising a front cross beam frame, a cross beam frame connecting system and a rear cross beam frame, the three groups of cross beam frame connecting systems are used for connecting a front cross beam frame and a rear cross beam frame into a whole to form a bottom basket system; the rear cross beam frame is parallel to the front cross beam frame, and the rear cross beam frame and the front cross beam frame are connected with the hanging basket main truss system through the anchoring suspension system. The bottom basket system has the advantages that the front lower cross beam and the rear lower cross beam are connected into a whole, so that the overall stability of the bottom basket system is improved. The structure is constructed in an assembled mode, integral hoisting is conducted on site after machining is completed, and installation is convenient and fast. The truss structure can adapt to a high-load working environment, and the local bearing capacity of the bottom basket platform is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of cable-stayed bridge construction, in particular to a front and rear lower crossbeam truss connection structure of a rear support hanging basket of an ultra-wide variable-width PC cable-stayed bridge. Background Art

[0002] During the construction of the hanging basket of an ultra-wide PC cable-stayed bridge, excessive deformation of the front side of the bottom basket system will bring greater construction risks to the main beam. In existing operations, the lower crossbeam of a conventional hanging basket is generally made of I-beams. When the pouring load increases, the deflection of the mid-span of the lower crossbeam increases, so the lower crossbeam often adopts the form of a truss. However, the front and rear lower crossbeams are generally connected only by the lower longitudinal beam, which makes the overall structural stability of the bottom basket system worse. Utility Model Content

[0003] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a front and rear lower cross beam truss connection structure of the rear support basket of an ultra-wide variable-width PC cable-stayed bridge. This structure increases the overall stability of the bottom basket system by connecting the front and rear lower cross beams into a whole.

[0004] The utility model is realized by constructing a front and rear lower cross beam truss connection structure of an ultra-wide variable width PC cable-stayed bridge rear support basket, characterized in that it comprises a front cross beam frame (310), a cross beam frame connection system (320) and a rear cross beam frame (330); the cross beam frame connection system (320) is composed of three groups, so as to connect the front cross beam frame (310) and the rear cross beam frame (330) into a whole to form a bottom basket system (300); the rear cross beam frame (330) is arranged parallel to the front cross beam frame (310), and the rear cross beam frame (330) and the front cross beam frame (310) are connected to the basket main truss system (200) through an anchoring suspension system (400).

[0005] Further, the front crossbeam frame (310) includes

[0006] A front upper chord rod (311), wherein the front upper chord rod is provided in a single group; and

[0007] A front lower chord bar (312), wherein two groups of the front lower chord bars (312) are arranged parallel to the front upper chord bar (311) on both sides below the front upper chord bar, and the two groups of the front lower chord bars (312) are connected to the front upper chord bar (311) via a first web bar (314) to form a front upper cross beam frame of a triangular structure.

[0008] Furthermore, the front crossbeam frame (310) also includes

[0009] A truss horizontal rod (316), the truss horizontal rod being parallel to the front lower chord rod (312) and being arranged below the front lower chord rod (312);

[0010] A truss upright (315), wherein the truss upright (315) is vertically arranged between the truss horizontal rod and the front lower chord rod, and the truss horizontal rod and the front lower chord rod are fixedly connected via the truss upright (315); and

[0011] A truss diagonal rod (313), one end of which is fixedly connected to the truss horizontal rod, and the other end of which extends obliquely upward toward the outside of the truss horizontal rod and is connected to the front lower chord rod;

[0012] The truss horizontal rods, truss vertical rods, truss diagonal rods and the front lower chord rods form a trapezoidal truss.

[0013] Further, the rear crossbeam frame (330) includes

[0014] A rear upper chord rod (331), wherein both ends of the rear upper chord rod are locally linearly lowered; and

[0015] A rear lower chord (332), wherein the rear lower chord (332) is connected to the rear upper chord (331) via a second web member (333) to form a single-frame truss structure.

[0016] Further; the above beam frame connection system (320) includes

[0017] Platform longitudinal beams (320A), which are distributed at the upper part of the front and rear beam frames according to the designed spacing, in order to place the formwork truss platform on the upper part for the erection and installation of the formwork and to bear the construction pouring load; and

[0018] The longitudinal beam truss (320B) is respectively placed on both sides and the middle between the front and rear cross beam frames, and is mainly used to longitudinally connect the front and rear cross beam frames to connect the bottom basket system into a whole, thereby improving the stability of the structure.

[0019] The utility model has the advantages:

[0020] 1. This structure increases the overall stability of the bottom basket system by connecting the front and rear lower cross beams into a whole.

[0021] 2. This structure is assembled and constructed. After processing, it will be hoisted as a whole on site, which makes installation convenient and quick.

[0022] 3. This structure adopts a truss structure that can adapt to high-load working environments and enhance the local bearing capacity of the bottom basket platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the implementation of the beam-truss connection structure of the present application;

[0024] Figure 2-Figure 3 It is the front crossbeam frame of this application;

[0025] Figure 4 This application is the rear beam frame

[0026] Figure 5 This is a schematic diagram of the coordination between the rear crossbeam frame and the beam body.

[0027] Figure 6-Figure 7 It is a schematic diagram of the beam frame connection system;

[0028] Figure 8-Figure 9 It is a schematic diagram of the implementation of the rear support hanging basket of the π-shaped beam of an ultra-wide variable-width PC cable-stayed bridge. DETAILED DESCRIPTION

[0029] The following will be combined with the attached Figure 1-Figure 9 The utility model is described in detail, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] During the construction of the hanging basket of an ultra-wide PC cable-stayed bridge, excessive deformation of the front side of the bottom basket system will bring greater construction risks to the main beam. Therefore, in order to solve this technical problem, this application proposes a front and rear lower crossbeam truss connection structure of the rear support hanging basket of an ultra-wide variable-width PC cable-stayed bridge; including a front crossbeam frame 310, a crossbeam frame connection system 320 and a rear crossbeam frame 330; the crossbeam frame connection system 320 is three groups, which realizes connecting the front crossbeam frame 310 and the rear crossbeam frame 330 into a whole to form a bottom basket system 300; the rear crossbeam frame 330 is arranged parallel to the front crossbeam frame 310, and the rear crossbeam frame 330 and the front crossbeam frame 310 are connected to the hanging basket main truss system 200 through an anchoring suspension system 400.

[0031] In the present application, the front cross beam frame 310 includes

[0032] A front upper chord rod 311, wherein the front upper chord rod is provided in a single group; and

[0033] The front lower chord bar 312 is provided with two groups, which are arranged on both sides below the front upper chord bar 311 in parallel with the front upper chord bar 311, and the two groups of the front lower chord bars 312 are connected to the above-mentioned front upper chord bar 311 through the first web bar 314 to form a front upper cross beam frame with a triangular structure.

[0034] In the present application, the front cross beam frame 310 also includes

[0035] A truss horizontal bar 316, which is parallel to the front lower chord bar 312 and is arranged below the front lower chord bar 312;

[0036] A truss upright 315, wherein the truss upright 315 is vertically disposed between the truss horizontal bar and the front lower chord bar, and the truss horizontal bar and the front lower chord bar are fixedly connected by the truss upright 315; and

[0037] A truss diagonal rod 313, one end of which is fixedly connected to the truss horizontal rod, and the other end of which extends upward and obliquely toward the outside of the truss horizontal rod and is connected to the front lower chord rod;

[0038] The truss horizontal rods, truss vertical rods, truss diagonal rods and the front lower chord rods form a trapezoidal truss.

[0039] In the present application, the rear cross beam frame 330 includes

[0040] A rear upper chord rod 331, the two ends of which are locally linearly lowered; and

[0041] The rear lower chord 332 is connected to the rear upper chord 331 through a second web member 333 to form a single truss structure.

[0042] The front and rear cross beam frames are all formed by connecting 6 single frames by pins. In addition, the rear upper chord 203 of the rear cross beam frame is characterized by local linear lowering on both sides of the beam body, which is to facilitate the installation of the anchor block at the bottom of the PC cable-stayed bridge body.

[0043] In the present application, the above-mentioned beam frame connection system 320 includes

[0044] The platform longitudinal beam 320A is distributed at the upper part of the front and rear beam frames according to the designed spacing, so as to place the formwork truss platform on the upper part for the erection and installation of the formwork 800 and to bear the construction pouring load; and

[0045] The longitudinal beam trusses 320B are respectively placed on both sides and in the middle between the front and rear cross beam frames, and are mainly used to longitudinally connect the front and rear cross beam frames to connect the bottom basket system into a whole, thereby improving the stability of the structure.

[0046] The present application avoids excessive deflection caused by the large width of the front and rear lower crossbeams of the hanging basket by designing the bottom basket as a truss structure. A trapezoidal truss is set under the front lower crossbeam to balance the large bending moment and deflection caused by the width, so that the hanging basket structure tends to be stable. The front and rear crossbeam frames are connected by a crossbeam frame connection system to connect the bottom basket system 300 into a whole, thereby improving the stability of the structure. In order to improve reusability, the front and rear crossbeam frames are both composed of 6 single frames connected by pins. In addition, if Figure 5 As shown, the rear upper chord of the rear cross beam frame has a local linear lowering feature on both sides of the beam body, the purpose of which is to facilitate the installation of the lower anchor block of the PC cable-stayed bridge body.

[0047] Figure 8-Figure 9 The present invention is a schematic diagram of an implementation of a π-beam rear support hanging basket of an ultra-wide variable-width PC cable-stayed bridge, wherein the π-beam 100, a hanging basket main truss system 200, a bottom basket system 300, and an anchor suspension system 400.

[0048] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection structure of front and rear lower cross beam trusses of rear support basket of ultra-wide variable width PC cable-stayed bridge, characterized in that; The invention comprises a front cross beam frame (310), a cross beam frame connection system (320) and a rear cross beam frame (330); the cross beam frame connection system (320) is composed of three groups, which realizes connecting the front cross beam frame (310) and the rear cross beam frame (330) into a whole, thereby forming a bottom basket system (300); the rear cross beam frame (330) is arranged parallel to the front cross beam frame (310), and the rear cross beam frame (330) and the front cross beam frame (310) are connected to the main truss system (200) of the hanging basket via an anchoring suspension system (400).

2. According to claim 1, the front and rear lower cross beam truss connection structure of the rear support basket of the ultra-wide variable width PC cable-stayed bridge is characterized in that; The front crossbeam frame (310) includes A front upper chord rod (311), wherein the front upper chord rod is provided in a single group; as well as A front lower chord bar (312), wherein two groups of the front lower chord bars (312) are arranged parallel to the front upper chord bar (311) on both sides below the front upper chord bar, and the two groups of the front lower chord bars (312) are connected to the front upper chord bar (311) via a first web bar (314) to form a front upper cross beam frame of a triangular structure.

3. According to claim 2, the front and rear lower cross beam truss connection structure of the rear support basket of the ultra-wide variable width PC cable-stayed bridge is characterized in that; The front crossbeam frame (310) also includes A truss horizontal rod (316), the truss horizontal rod being parallel to the front lower chord rod (312) and being arranged below the front lower chord rod (312); A truss upright (315), wherein the truss upright (315) is vertically arranged between the truss horizontal rod and the front lower chord rod, and the truss horizontal rod and the front lower chord rod are fixedly connected via the truss upright (315); and A truss diagonal rod (313), one end of which is fixedly connected to the truss horizontal rod, and the other end of which extends obliquely upward toward the outside of the truss horizontal rod and is connected to the front lower chord rod; The truss horizontal rods, truss vertical rods, truss diagonal rods and the front lower chord rods form a trapezoidal truss.

4. According to claim 1, the front and rear lower cross beam truss connection structure of the rear support basket of the ultra-wide variable width PC cable-stayed bridge is characterized in that; The rear cross beam frame (330) includes A rear upper chord rod (331), wherein both ends of the rear upper chord rod are locally linearly lowered; as well as A rear lower chord (332), wherein the rear lower chord (332) is connected to the rear upper chord (331) via a second web member (333) to form a single-frame truss structure.

5. According to claim 1, the front and rear lower cross beam truss connection structure of the rear support basket of the ultra-wide variable width PC cable-stayed bridge is characterized in that; The above-mentioned beam frame connection system (320) includes Platform longitudinal beams (320A), which are distributed at the upper part of the front and rear beam frames according to the designed spacing, in order to place the formwork truss platform on the upper part for the erection and installation of the formwork and to bear the construction pouring load; and The longitudinal beam truss (320B) is respectively placed on both sides and the middle between the front and rear cross beam frames, and is mainly used to longitudinally connect the front and rear cross beam frames to connect the bottom basket system into a whole, thereby improving the stability of the structure.

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