A device and method for adjusting the horizontal angle of the cable of a variable-section π-shaped beam PC cable-stayed bridge cable hanging basket

Abstract

The present invention discloses a device and method for adjusting the horizontal angle of the inclined cable of the cable basket of a variable-section π-beam PC cable-stayed bridge; the device and method are provided with an adjustment system and a spherical pad system; the adjustment system on the adjustment beam and the spherical pad system work together to finally achieve precise adjustment of the horizontal angle of the inclined cable of the cable basket. The adjustment system is anchored on the arc-shaped bow web through the inclined cable; the adjustment system is composed of a main beam, a main beam leveling block, a main beam limit system and a pull rod adjustment system. The method sets an adjustment beam on the arc-shaped bow of the cable basket, and adjusts the adjustment system on the beam and the spherical pad system work together to finally achieve precise adjustment of the horizontal angle of the inclined cable of the cable basket. The method effectively solves the problem that the anchoring point at the end of the inclined cable beam of the ultra-wide variable-section PC cable-stayed bridge is constantly changing, and conventional angle adjustment methods are not applicable.

Description

Technical Field

[0001] The invention relates to the field related to cable-stayed bridge construction, and specifically to a device and method for adjusting the horizontal angle of a cable-stayed cable of a cable hanging basket of a PC cable-stayed bridge with a variable cross-section π-shaped beam. Background Art

[0002] At present, there are few variable-section π-beam PC cable-stayed bridges in China. The anchorage position of the ends of conventional equal-section space cable PC cable-stayed bridges is relatively fixed, and the horizontal angle of the cable is small. Usually, the horizontal angle can be adjusted by directly setting an adjustment pad on the arc head. However, for variable-section π-beam PC cable-stayed bridges, due to the widening of the main beam, the anchorage position of the cable beam end is constantly changing. Therefore, the design of the cable hanging basket needs to meet the two major problems of anchorage position change and horizontal angle change at the same time. However, there is currently a lack of systematic research on the horizontal angle adjustment method of the cable hanging basket of such cable-stayed bridges in China. Summary of the invention

[0003] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a device and method for adjusting the horizontal angle of the inclined cable of the cable hanging basket of a variable-section π-beam PC cable-stayed bridge. The method arranges an adjustment beam on the arc-shaped head of the cable hanging basket, and the adjustment system on the adjustment beam and the spherical pad system work together to finally achieve accurate adjustment of the horizontal angle of the inclined cable of the cable hanging basket. The method effectively solves the problem that the anchor point of the cable beam end of the ultra-wide variable-section PC cable-stayed bridge is constantly changing, and the conventional angle adjustment method is not applicable.

[0004] The present invention is implemented by constructing a variable-section π-shaped beam PC cable-stayed bridge cable hanging basket cable-stayed cable horizontal angle adjustment device, which is characterized by having an adjustment system and a spherical pad system;

[0005] By adjusting the adjustment system on the crossbeam and the spherical pad system, the horizontal angle of the inclined cable of the guying basket can be accurately adjusted.

[0006] The adjustment system is anchored on the arc-shaped bow web through the inclined cable;

[0007] The adjustment system consists of a main beam, a main beam leveling block, a main beam limiting system and a pull rod adjustment system.

[0008] According to the present invention, a device for adjusting the horizontal angle of the cable of a variable-section π-shaped beam PC cable-stayed bridge cable hanging basket is characterized in that: the main beam is welded from steel plates, and a cable construction space is reserved in the middle of the main beam; the main beam leveling block is welded from steel plates, the bottom curvature of the main beam leveling block is consistent with the first curvature of the arc, and the top is set to be horizontal to meet the main beam installation needs.

[0009] According to the present invention, a device for adjusting the horizontal angle of the cable of the cable-stayed bridge of a variable-section π-type beam is characterized in that: the main beam limiting system is composed of an arc-shaped first web limiting system and a spherical pad limiting system; the arc-shaped first web limiting system is composed of a web arc-shaped stopper, a main beam limiting stopper and a web limiting bolt; the web arc-shaped stopper is directly welded to the arc-shaped first web, and the main beam limiting stopper is welded to the main beam; and the web limiting bolts are installed after the adjustment system is adjusted into place to lock the vertical position of the adjustment system.

[0010] According to the invention, a device for adjusting the horizontal angle of the cable of a variable-section π-shaped beam PC cable-stayed bridge cable hanging basket is characterized in that the spherical pad limit system is composed of a spherical pad limit block and a limit bolt, and the spherical pad limit block is bolted to the main beam through the limit bolt.

[0011] According to the present invention, a device for adjusting the horizontal angle of the cable of a variable-section π-shaped beam PC cable-stayed bridge cable hanging basket is characterized in that the tie rod adjustment system consists of an adjusting tie rod, an adjusting tie rod reaction block and a tie rod articulated joint; the adjusting tie rod reaction block is welded to the main beam, and a tie rod articulated joint is arranged at the end of the adjusting tie rod to be connected to the spherical pad.

[0012] According to the variable-section π-beam PC cable-stayed bridge cable hanging basket cable horizontal angle adjustment device described in the present invention, it is characterized in that the spherical pad system consists of a spherical pad base and a spherical pad slider; the spherical pad base and the spherical pad slider are both made of cast steel.

[0013] A method for adjusting the horizontal angle of the cable of a variable-section π-shaped beam PC cable-stayed bridge, characterized in that the operating steps are as follows:

[0014] Step 1, move the guy rope basket forward into position;

[0015] Step 2, adjust the vertical position of the adjustment system, and install the web limit bolts after the adjustment is in place to lock the vertical position of the adjustment system;

[0016] Step 3: accurately calculate the anchoring position of the inclined cable, and move the horizontal position of the spherical pad system by adjusting the pull rod, so that the extension line of the inclined cable passes through the middle of the spherical pad system. After moving into place, lock the adjusting pull rod to achieve preliminary adjustment of the horizontal position;

[0017] Step 4, initially tensioning the cable. After the cable is stressed, the horizontal angle of the cable is automatically and accurately adjusted through the spherical pad slider in the spherical pad adjustment system.

[0018] The present invention has the following advantages: The advantages and beneficial effects of this patent are embodied in: effectively realizing the precise adjustment of the horizontal angle of the cable hanging basket of the variable-section π-type beam PC cable-stayed bridge, with high adjustment efficiency and safe and reliable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the elevation structure of the device of the present invention;

[0020] Figure 2 It is a schematic diagram of the planar structure of the device of the present invention;

[0021] Figure 3 It is a schematic diagram of the side structure of the device of the present invention;

[0022] Figure 4 It is a schematic diagram of the overall elevation arrangement position of the adjustment beam;

[0023] Figure 5 It is the main beam limit system large-scale drawing;

[0024] Figure 6 This is a schematic diagram of the main beam leveling block;

[0025] Figure 7 It is a schematic diagram of the web arc stop;

[0026] Figure 8 is a schematic diagram of a spherical pad base;

[0027] Fig. 9 It is a schematic diagram of a spherical pad slider. DETAILED DESCRIPTION

[0028] The following will be combined with the attached Figure 1-Figure 9 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The present invention provides a variable-section π-shaped beam PC cable-stayed bridge cable hanging basket cable horizontal angle adjustment device through improvement, which is implemented in the following manner; it has an adjustment system and a spherical pad system;

[0030] By adjusting the adjustment system on the crossbeam and the spherical pad system, the horizontal angle of the inclined cable of the guying basket can be accurately adjusted.

[0031] The adjustment system is anchored on the arc-shaped bow web 6 through the inclined cable;

[0032] The adjustment system consists of a main beam 1, a main beam leveling block 2, a main beam limiting system and a pull rod adjustment system.

[0033] When the present invention is implemented; the main beam 1 is welded from steel plates, and a cable construction space is reserved in the middle of the main beam; the main beam leveling block 2 is welded from steel plates, the bottom curvature of the main beam leveling block is consistent with the first curvature of the arc, and the top is set to be horizontal to meet the main beam installation needs.

[0034] When the present invention is implemented, the main beam limiting system is composed of an arc-shaped first web limiting system and a spherical pad limiting system; the arc-shaped first web limiting system is composed of a web arc stopper 3, a main beam limiting stopper 4 and a web limiting bolt 5; the web arc stopper 3 is directly welded to the arc-shaped first web 6, and the main beam limiting stopper 4 is welded to the main beam 1; after the adjustment system is adjusted into place, the web limiting bolts are installed to realize locking of the vertical position of the adjustment system.

[0035] When the present invention is implemented, the spherical pad limit system is composed of a spherical pad limit block 11 and a limit bolt 7 , and the spherical pad limit block 11 is bolted to the main beam 1 through the limit bolt 7 .

[0036] When the present invention is implemented, the tie rod adjustment system consists of an adjusting tie rod 8, an adjusting tie rod reaction block 9 and a tie rod articulated joint 10; the adjusting tie rod reaction block 9 is welded to the main beam 1, and a tie rod articulated joint 10 is provided at the end of the adjusting tie rod 8 to connect with the spherical pad.

[0037] When the present invention is implemented, the spherical pad system is composed of a spherical pad base and a spherical pad slider; the spherical pad base and the spherical pad slider are both made of cast steel.

[0038] A method for adjusting the horizontal angle of the cable of a variable-section π-shaped beam PC cable-stayed bridge, the operation steps are as follows:

[0039] Step 1, move the guy rope basket forward into position;

[0040] Step 2, adjust the vertical position of the adjustment system, and install the web limit bolts after the adjustment is in place to lock the vertical position of the adjustment system;

[0041] Step 3: accurately calculate the anchoring position of the inclined cable, and move the horizontal position of the spherical pad system by adjusting the pull rod, so that the extension line of the inclined cable passes through the middle of the spherical pad system. After moving into place, lock the adjusting pull rod to achieve preliminary adjustment of the horizontal position;

[0042] Step 4, initially tensioning the cable. After the cable is stressed, the horizontal angle of the cable is automatically and accurately adjusted through the spherical pad slider in the spherical pad adjustment system.

[0043] The advantages and beneficial effects of this patent are as follows: it effectively realizes the precise adjustment of the horizontal angle of the cable hanging basket of the variable-section π-beam PC cable-stayed bridge, with high adjustment efficiency and safe and reliable structure.

[0044] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for adjusting the horizontal angle of the cable of a PC cable-stayed bridge with a variable cross-section π-shaped beam, characterized in that: With adjustment system and spherical pad system; By adjusting the adjustment system on the crossbeam and the spherical pad system, the horizontal angle of the inclined cable of the guying basket can be precisely adjusted. The adjustment system is anchored on the arc-shaped bow web (6) via a stay cable; The adjustment system is composed of a main beam (1), a main beam leveling block (2), a main beam limiting system and a pull rod adjustment system; The main beam (1) is welded from steel plates, and a cable construction space is reserved in the middle of the main beam; the main beam leveling block (2) is welded from steel plates, the bottom curvature of the main beam leveling block is consistent with the first curvature of the arc, and the top is set to be horizontal to meet the main beam installation requirements; The main beam limiting system is composed of an arc-shaped first web limiting system and a spherical pad limiting system; the arc-shaped first web limiting system is composed of a web arc stopper (3), a main beam limiting stopper (4) and a web limiting bolt (5); the web arc stopper (3) is directly welded to the arc-shaped first web (6), and the main beam limiting stopper (4) is welded to the main beam (1); after the adjustment system is adjusted into place, the web limiting bolt is installed to achieve locking of the vertical position of the adjustment system; The spherical pad limit system consists of a spherical pad limit block (11) and a limit bolt (7), and the spherical pad limit block (11) is bolted to the main beam (1) via the limit bolt (7); The tie rod adjustment system is composed of an adjustment tie rod (8), an adjustment tie rod reaction block (9) and a tie rod hinge joint (10); the adjustment tie rod reaction block (9) is welded to the main beam (1), and a tie rod hinge joint (10) is provided at the end of the adjustment tie rod (8) to be connected to the spherical pad; The spherical pad system consists of a spherical pad base and a spherical pad slider; the spherical pad base and the spherical pad slider are both made of cast steel.

2. A method for adjusting the horizontal angle adjustment device of the cable hanging basket of the variable-section π-shaped beam PC cable-stayed bridge as claimed in claim 1, characterized in that; The steps are as follows: Step 1, move the guy rope basket forward into position; Step 2, adjust the vertical position of the adjustment system, and install the web limit bolts after the adjustment is in place to lock the vertical position of the adjustment system; Step 3: accurately calculate the anchoring position of the inclined cable, and move the horizontal position of the spherical pad system by adjusting the pull rod, so that the extension line of the inclined cable passes through the middle of the spherical pad system. After moving into place, lock the adjusting pull rod to achieve preliminary adjustment of the horizontal position; Step 4, initially tensioning the cable. After the cable is stressed, the horizontal angle of the cable is automatically and accurately adjusted through the spherical pad slider in the spherical pad adjustment system.

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