Cable-stayed bridge steel main tower segment positioning device and positioning method

Abstract

The present invention discloses a segment positioning device and positioning method of a cable-stayed bridge steel main tower, comprising a supporting steel plate welded and fixed on the wall plate of the steel main tower; a main steel plate supported on the supporting steel plate; the main steel plates are four in number, and the four main steel plates are arranged around the steel main tower; a horizontal jack group and a vertical jack group are installed on the main steel plate; the steel main towers of two adjacent segments adjust their horizontal relative positions through the horizontal jack group; the steel main towers of two adjacent segments adjust their vertical relative positions through the vertical jack group. The positioning device of the present invention can be reused, easy to install, easy to disassemble, more stable, accurate in positioning, and fast in positioning; the device has strong flexibility and adaptability, and good applicability; each component of the positioning device of the present invention is made of the same steel material as the steel main tower itself, and is easy to install and disassemble, and easy to modify.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a segment positioning device and a positioning method for a steel main tower of a cable-stayed bridge. Background Art

[0002] The construction of the steel main tower of a cable-stayed bridge requires precise horizontal and vertical positioning of the steel main tower of each section. However, most of the positioning devices used in the existing technology cannot be recycled, and the positioning effect is poor and the operation is complicated, which greatly increases manpower and material resources.

[0003] Based on this technical problem, technicians in this field urgently need to develop a device that can be recycled, simplify the construction process, and accurately position. Summary of the invention

[0004] The purpose of the present invention is to provide a cable-stayed bridge steel main tower segment positioning device and a positioning method thereof which can be recycled, simplify the construction process and accurately position.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The cable-stayed bridge steel main tower segment positioning device of the present invention mainly comprises:

[0007] Supporting steel plates welded and fixed to the steel main tower wall panels;

[0008] A main steel plate supported on the supporting steel plate;

[0009] There are four main steel plates, which are arranged around the steel main tower;

[0010] A horizontal jack group and a vertical jack group installed on the main steel plate;

[0011] The horizontal relative positions of the steel main towers of two adjacent sections are adjusted by the horizontal jack group;

[0012] The vertical relative positions of the steel main towers of two adjacent sections are adjusted by the vertical jack group.

[0013] Furthermore, the main steel plate is a steel plate with a thickness of 50 mm, and both ends of the main steel plate extend to both sides of the steel main tower;

[0014] The adjacent main steel plates are arranged crosswise;

[0015] A jack platform is fixed at the main steel plate near the corner of the steel main tower;

[0016] The horizontal jack group and the vertical jack group are both installed on the jack platform.

[0017] Furthermore, the jack platform is formed on the main steel plate by welding a steel plate with a thickness of 30 mm;

[0018] The jack platform is formed with a horizontal jack group installation portion and a vertical jack group installation portion;

[0019] The horizontal jack group includes four horizontal jacks respectively installed in four directions of the steel main tower;

[0020] The vertical jack group includes four vertical jacks respectively installed in four directions of the steel main tower.

[0021] Furthermore, the maximum loads of the horizontal jack and the vertical jack are both 50T.

[0022] Furthermore, the maximum stress of the main steel plate and all steel plates of the jack platform is 1.129*105KN / ㎡=112.9MPa.

[0023] Furthermore, a precision-rolled threaded steel tie rod is stretched between the main steel plates on the opposite side.

[0024] Furthermore, the number of the high-precision rolled threaded steel tie rods is eight, and two high-precision rolled threaded steel tie rods are fixed on each side of the steel main tower, and the maximum stress of the high-precision rolled threaded steel tie rods is 1.9844*105KN / ㎡=198.4MPa.

[0025] The present invention discloses a method for positioning a cable-stayed bridge steel main tower segment, which mainly includes the following steps:

[0026] S101, make four main steel plates, and connect and fix the jack platform to the main steel plates;

[0027] S102. Weld and fix the supporting steel plate on the front section of the steel main tower;

[0028] S103, supporting the manufactured main steel plate on the supporting steel plate;

[0029] S104. Install the finished rolled threaded steel tie rod and tighten it by hand;

[0030] S105, installing four horizontal jacks and four vertical jacks on the jack platform;

[0031] S106. Lift the next section of the steel main tower to the top of the previous section and stabilize it initially using a deck or temporary support;

[0032] S107. Welding a stress-bearing steel plate above the vertical jack;

[0033] S108, using the horizontal jack to adjust the plane position of the next segment and the coordinates of the four corner points at the bottom; using the vertical jack to adjust the elevation of the next segment and the elevation of the left side of the four corner points at the top and the entire segment;

[0034] S109, after positioning, weld the welds of the two steel main tower segments, and after meeting the requirements for crane unhooking, remove the jack and main steel plate;

[0035] S110. Carry out positioning construction of the next section of the steel main tower in a cycle.

[0036] Furthermore, in the step S109, before removing the main steel plate, eight precision-rolled threaded steel tie rods are first removed, and then the main steel plate is lifted up and removed.

[0037] In the above technical solution, the cable-stayed bridge steel main tower segment positioning device and positioning method provided by the present invention have the following beneficial effects:

[0038] The positioning device of the present invention can be reused, is easy to install and disassemble, is more stable, has accurate positioning, and has fast positioning; the device has strong flexibility and adaptability, and has good applicability;

[0039] All parts of the positioning device of the present invention are made of the same steel material as the steel main tower itself, and are easy to install and disassemble, and easy to modify;

[0040] The device becomes a closed system with strong stability and anti-overturning performance; it has high beam lifting efficiency and is easy to use, and can meet the precise positioning requirements of multi-segment steel main towers.

[0041] The device can realize multi-angle adjustment, the adjustment effect is more precise, and the adjustment process is controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0043] Figure 1 A structural schematic diagram of a construction state of a cable-stayed bridge steel main tower segment positioning device provided by an embodiment of the present invention;

[0044] Figure 2 A schematic structural diagram of a main steel plate of a cable-stayed bridge steel main tower segment positioning device provided by an embodiment of the present invention;

[0045] Figure 3 for Figure 2 A partial enlarged view of middle A;

[0046] Figure 4 for Figure 3 Sectional view in III-III;

[0047] Figure 5 for Figure 3 Sectional view at IV-IV.

[0048] Description of reference numerals:

[0049] 1. Support steel plate; 2. Main steel plate; 3. Fine-rolled threaded steel tie rod; 4. Jack platform; 5. Jack. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0051] See also Figure 1 to Figure 5 As shown;

[0052] The cable-stayed bridge steel main tower segment positioning device of the present invention mainly comprises:

[0053] A supporting steel plate 1 welded and fixed to the steel main tower wall plate;

[0054] A main steel plate 2 supported on a supporting steel plate 1;

[0055] There are four main steel plates 2, which are arranged around the steel main tower;

[0056] A horizontal jack group and a vertical jack group installed on the main steel plate 2;

[0057] The horizontal relative positions of two adjacent segments of steel main towers are adjusted by a horizontal jack group;

[0058] The vertical relative positions of two adjacent sections of the steel main tower are adjusted by a vertical jack group.

[0059] Specifically, this embodiment discloses a positioning device used in the construction of a steel main tower of a cable-stayed bridge, which is mainly used for the positioning construction of two adjacent segments of a steel main tower. It mainly includes support steel plates 1 fixed to adjacent steel main towers, respectively, a lower support steel plate fixed to the steel main tower of the previous segment, and an upper support steel plate fixed to the steel main tower of the next segment. At the same time, four main steel plates 2 are supported on the lower support steel plate, and a jack group is installed at the designed position of the main steel plate 2, respectively, a horizontal jack group and a vertical jack group, wherein the horizontal jack group is used to adjust the horizontal relative position of adjacent steel main tower segments, and the vertical jack group is used to adjust the vertical relative position of adjacent steel main tower segments.

[0060] Preferably, in this embodiment, the main steel plate 2 is a steel plate with a thickness of 50 mm, and both ends of the main steel plate 2 extend to both sides of the steel main tower;

[0061] Two adjacent main steel plates are arranged crosswise;

[0062] A jack platform 4 is fixed to the main steel plate 2 near the corner of the steel main tower;

[0063] The horizontal jack group and the vertical jack group are both installed on the jack platform 4.

[0064] The jack platform 4 is formed on the main steel plate 2 by welding a steel plate with a thickness of 30 mm;

[0065] The jack platform 4 is formed with a horizontal jack group installation portion and a vertical jack group installation portion;

[0066] The horizontal jack group includes four horizontal jacks respectively installed in four directions of the steel main tower;

[0067] The vertical jack group includes four vertical jacks respectively installed in four directions of the steel main tower.

[0068] More specifically: the jack platform 4 in this embodiment is fixed to the main steel plate 2 by welding with a 30mm rear steel plate. Taking into account the jack installation requirements and the direction in which each jack needs to be adjusted, the jack platform 4 in this embodiment has at least a horizontal jack group installation portion extending horizontally and used to install the horizontal jack, and a vertical jack group installation portion extending obliquely and used to install the vertical jack.

[0069] Preferably, in the above embodiment, the maximum loads of the horizontal jack and the vertical jack are both 50T.

[0070] Preferably, the maximum stress of the main steel plate and all the steel plates of the jack platform in the above embodiment is 1.129*105KN / ㎡=112.9MPa.

[0071] Preferably, in the above embodiment, a precision-rolled threaded steel tie rod 3 is stretched between the main steel plates 2 on opposite sides.

[0072] Preferably, in the above embodiment, the number of the fine-rolled threaded steel tie rods 3 is eight, and two fine-rolled threaded steel tie rods 3 are fixed on each side of the steel main tower, and the maximum stress of the fine-rolled threaded steel tie rods 3 is 1.9844*105KN / ㎡=198.4MPa.

[0073] The present invention discloses a method for positioning a cable-stayed bridge steel main tower segment, which mainly includes the following steps:

[0074] S101, make four main steel plates 2, and connect and fix the jack platform 4 on the main steel plates 2;

[0075] S102, welding and fixing the supporting steel plate 1 on the front segment of the steel main tower;

[0076] S103, supporting the manufactured main steel plate 2 on the supporting steel plate 1;

[0077] S104, install the finished rolled threaded steel tie rod 3 and tighten it by hand;

[0078] S105, installing four horizontal jacks and four vertical jacks on the jack platform 4;

[0079] S106. Lift the next section of the steel main tower to the top of the previous section and stabilize it initially using a deck or temporary support;

[0080] S107. Welding a stress-bearing steel plate above the vertical jack;

[0081] S108, using the horizontal jack to adjust the plane position of the next segment and the coordinates of the four corner points at the bottom; using the vertical jack to adjust the elevation of the next segment and the elevation of the left side of the four corner points at the top and the entire segment;

[0082] S109, after positioning, weld the welds of the two steel main tower segments, and after meeting the requirements for crane unhooking, remove the jack and main steel plate 2;

[0083] S110. Carry out positioning construction of the next section of the steel main tower in a cycle.

[0084] Preferably, in the present embodiment, before removing the main steel plate 2 in step S109, eight precision-rolled threaded steel tie rods 3 are first removed, and then the main steel plate 2 is lifted up and removed.

[0085] In the above technical solution, the cable-stayed bridge steel main tower segment positioning device and positioning method provided by the present invention have the following beneficial effects:

[0086] The positioning device of the present invention can be reused, is easy to install and disassemble, is more stable, has accurate positioning, and has fast positioning; the device has strong flexibility and adaptability, and has good applicability;

[0087] All parts of the positioning device of the present invention are made of the same steel material as the steel main tower itself, and are easy to install and disassemble, and easy to modify;

[0088] The device becomes a closed system with strong stability and anti-overturning performance; it has high beam lifting efficiency and is easy to use, and can meet the precise positioning requirements of multi-segment steel main towers.

[0089] The device can realize multi-angle adjustment, the adjustment effect is more precise, and the adjustment process is controllable.

[0090] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cable-stayed bridge steel main tower segment positioning device, characterized in that: The positioning device mainly includes: A supporting steel plate (1) welded and fixed to the steel main tower wall plate; A main steel plate (2) supported on the supporting steel plate (1); There are four main steel plates (2), and the four main steel plates (2) are arranged along the periphery of the steel main tower; A horizontal jack group and a vertical jack group installed on the main steel plate (2); The horizontal relative positions of the steel main towers of two adjacent sections are adjusted by the horizontal jack group; The vertical relative positions of the steel main towers of two adjacent sections are adjusted by the vertical jack group; The main steel plate (2) is a steel plate with a thickness of 50 mm, and both end portions of the main steel plate (2) extend to both sides of the steel main tower; The adjacent main steel plates (2) are partially arranged crosswise; A jack platform (4) is fixed to the main steel plate (2) at a position close to the corner of the steel main tower; The horizontal jack group and the vertical jack group are both installed on the jack platform (4); The jack platform (4) is formed on the main steel plate (2) by welding a steel plate with a thickness of 30 mm; The jack platform (4) is formed with a horizontal jack group mounting portion and a vertical jack group mounting portion; The horizontal jack group includes four horizontal jacks respectively installed in four directions of the steel main tower; The vertical jack group includes four vertical jacks respectively installed in four directions of the steel main tower; The maximum load of the horizontal jack and the vertical jack are both 50T; A precision-rolled threaded steel tie rod (3) is stretched between the main steel plates (2) on the opposite side.

2. The cable-stayed bridge steel main tower segment positioning device according to claim 1 is characterized in that: The maximum stress of the main steel plate and all steel plates of the jack platform is 1.129*105KN / ㎡=112.9MPa.

3. The cable-stayed bridge steel main tower segment positioning device according to claim 1, characterized in that: The number of the fine-rolled threaded steel tie rods (3) is eight, and two fine-rolled threaded steel tie rods (3) are fixed on each side of the steel main tower. The maximum stress of the fine-rolled threaded steel tie rods (3) is 1.9844*105KN / ㎡=198.4MPa.

4. The cable-stayed bridge steel main tower segment positioning method of the cable-stayed bridge steel main tower segment positioning device according to claim 1, characterized in that: The positioning method mainly includes the following steps: S101, manufacturing four main steel plates (2), and welding and fixing the jack platform (4) on the main steel plates (2); S102, welding and fixing the supporting steel plate (1) on the front segment of the steel main tower; S103, supporting the manufactured main steel plate (2) on the supporting steel plate (1); S104, install the finished rolled threaded steel tie rod (3) and tighten it by hand; S105, installing four horizontal jacks and four vertical jacks on the jack platform (4); S106. Lift the next section of the steel main tower to the top of the previous section and stabilize it initially using a deck or temporary support; S107. Welding a stress-bearing steel plate above the vertical jack; S108, using the horizontal jack to adjust the plane position of the next segment and the coordinates of the four corner points at the bottom; using the vertical jack to adjust the elevation of the next segment and the elevation of the left side of the four corner points at the top and the entire segment; S109, after positioning, weld the welds of the two steel main tower segments, and after the crane unhooking requirements are met, remove the jack and the main steel plate (2); S110. Carry out positioning construction of the next section of the steel main tower in a cycle.

5. The method for positioning a cable-stayed bridge steel main tower segment according to claim 4, characterized in that: In the step S109, before removing the main steel plate (2), the eight precision-rolled threaded steel tie rods (3) are first removed, and then the main steel plate (2) is lifted up and removed.

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