Landscape bridge steel tower closure method

Abstract

The invention provides a landscape bridge steel tower closure method, and relates to the technical field of bridge construction, and the landscape bridge steel tower closure method comprises the following steps: continuously measuring real-time air temperature and the distance between two tower columns of a steel tower for multiple days; selecting the temperature when the measured distance is closest to the width of the closure section as the closure temperature; at the closure temperature, a flexible opposite-pulling device is arranged between the two tower columns, and the distance between the two tower columns is shortened through the flexible opposite-pulling device, so that the distance between the two tower columns is equal to the width of the closure section; and the closure section is installed and welded to the two tower columns. According to the invention, closure is carried out when the distance between the two tower columns is closest to the width of the closure section, and then the distance between the two tower columns is adjusted by using the flexible opposite-pulling device, so that the two tower columns can be aligned with the closure section, the closure difficulty is reduced, and the closure precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a method for closing steel towers of a landscape bridge. Background Art

[0002] Bridges generally refer to structures built on rivers, lakes, and seas to allow vehicles and pedestrians to pass smoothly. On a viewing bridge with cable-stayed cables and steel towers, the steel towers are an important component that provides tension for the cable-stayed cables. The steel towers are composed of two vertical towers and a joint section connected between the tops of the two towers. During construction, due to the high height of the steel towers and the complex structure, the installation of the two towers is affected by factors such as installation accuracy and welding shrinkage deformation. The towers will deflect outward during the construction process, resulting in the joints at the tops of the two towers being unable to match the pre-designed joint sections, making it difficult to weld the joint sections to the tops of the two towers, and making it difficult to join the steel towers. Summary of the invention

[0003] The problem to be solved by the present invention is how to provide a method for facilitating the closure of steel towers.

[0004] To this end, the present invention provides a method for closing a steel tower of a landscape bridge, comprising the following steps:

[0005] S1. Continuously measure the real-time air temperature and the distance between the two columns of the steel tower for several consecutive days;

[0006] S2, selecting the temperature when the measured spacing is closest to the width of the joint section as the joint closing temperature;

[0007] S3, at the closure temperature, setting a flexible tensioning device between the two tower columns, using the flexible tensioning device to shorten the distance between the two tower columns so that the distance between the two tower columns is equal to the width of the closure section;

[0008] S4, installing and welding the joint section on the two tower columns.

[0009] Optionally, the flexible pulling device includes a steel strand and a through-hole jack connected to one end of the steel strand, and the steel strand and the through-hole jack are respectively detachably connected to opposite side walls of two tower columns.

[0010] Optionally, the flexible pulling device also includes an anchor box, and the end of the steel strand away from the through-hole jack and the through-hole jack are respectively arranged in the two anchor boxes, and the opposite ends of the two anchor boxes are provided with ear plates, and the opposite sides of the two towers are provided with ear seats, and the adjacent ear seats and ear plates are detachably connected.

[0011] Optionally, the ear plate and the ear seat are connected via a pin shaft, the pin shaft extends in a horizontal direction, and the ear plate and the ear seat are used to rotate relative to each other around the pin shaft.

[0012] Optionally, the S4 includes:

[0013] S41, providing matching pieces at the ends of the two tower columns and at the two ends of the joint section;

[0014] S42, hoisting and placing the two ends of the joint section on the end faces of the two tower columns respectively, and adjusting the position of the joint section until the two matching pieces at the same end are aligned with each other;

[0015] S43, connecting the matching parts that fit each other together;

[0016] S44, welding the two ends of the joint section to the two tower columns respectively.

[0017] Optionally, the matching piece is an annular structure, which is used to be sleeved on the circumferential surface of the tower column or the joint section. A perforated plate is vertically extended on the circumferential outer surface of the annular structure, and the perforated plates of the two matching pieces that fit together are used to be connected by pins.

[0018] Optionally, the S44 includes the following steps:

[0019] S441, selecting a plurality of welding points evenly distributed around the ends of the joint section, and spot-welding the two ends of the joint section to the two tower columns respectively;

[0020] S442, welding the parts between the adjacent welding points.

[0021] Optionally, symmetrical welding is adopted when welding the parts between adjacent welding points.

[0022] Optionally, a floating crane is used to hoist the joint section.

[0023] Optionally, measuring the distance between two tower columns of the steel tower includes: selecting the closest points on the end faces of the two tower columns, namely a first measuring point and a second measuring point, and measuring the distance between the first measuring point and the second measuring point.

[0024] Compared with the prior art, the method for closing the steel tower of a landscape bridge of the present invention has the following beneficial effects:

[0025] The present invention takes into account the influence of temperature on the internal temperature stress of the steel structure, first continuously measures the real-time air temperature for several consecutive days, and the distance between the two tower columns at the corresponding air temperature; according to the measurement results, the temperature when the measured distance between the two tower columns is closest to the width of the joint section is selected as the joint temperature, and when the air temperature reaches the joint temperature, a flexible pulling device is set between the two tower columns. The flexible pulling device can pull the two tower columns relative to each other and shorten the distance between the two tower columns until the distance between the two tower columns is equal to the width of the joint section. The joint is closed at the joint temperature, and the distance the tower columns need to move is minimized. The joint section is installed and welded to the top of the two tower columns to complete the joint. The present invention closes the two tower columns when the distance between the two tower columns is closest to the width of the joint section, and then uses the flexible pulling device to adjust the distance between the two tower columns so that the two tower columns can be aligned with the joint section, thereby reducing the difficulty of the joint and improving the accuracy of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of the method for closing the steel tower of a landscape bridge according to an embodiment of the present invention;

[0027] Figure 2 It is a flow chart of the method for closing the steel tower of a landscape bridge according to an embodiment of the present invention;

[0028] Figure 3 It is a flow chart of the method for closing the steel tower of a landscape bridge according to an embodiment of the present invention;

[0029] Figure 4 It is a structural schematic diagram of a tower column according to an embodiment of the present invention;

[0030] Figure 5 It is a structural schematic diagram of a tower column and a joint section according to an embodiment of the present invention;

[0031] Figure 6 It is a schematic structural diagram of the flexible tensioning device according to an embodiment of the present invention;

[0032] Figure 7 It is a structural schematic diagram of a matching component according to an embodiment of the present invention;

[0033] Figure 8 It is a structural schematic diagram of the welding surface of the tower column and the joint section according to an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1-tower column; 2-joint section; 3-flexible tensioning device; 31-steel strand; 32-through-core jack; 33-anchor box; 331-ear plate; 34-ear seat; 35-pin shaft; 4-matching piece; 41-bottom plate; 42-perforated plate. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] It should be noted that in the description of the present invention, the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “top”, “bottom”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as limiting the scope of protection of the present invention.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0039] Moreover, although the present invention is described with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features of the various dependent claims and herein may be combined in a manner not described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other embodiments.

[0040] To solve the above problems, Figure 1 and Figure 5 As shown, the present invention provides a method for closing a steel tower of a landscape bridge, comprising the following steps:

[0041] S1, continuously measure the real-time air temperature and the distance between the two tower columns 1 of the steel tower for several consecutive days;

[0042] S2, selecting the temperature when the measured spacing is closest to the width of the closure section 2 as the closure temperature;

[0043] S3, at the closure temperature, setting a flexible tensioning device 3 between the two tower columns 1, using the flexible tensioning device 3 to shorten the distance between the two tower columns 1, so that the distance between the two tower columns 1 is equal to the width of the closure section 2;

[0044] S4, installing and welding the joint section 2 on the two tower columns 1.

[0045] In this embodiment, considering the influence of temperature on the internal temperature stress of the steel structure, the real-time air temperature and the distance between the two tower columns 1 at the corresponding air temperature are first measured continuously for several days; according to the measurement results, the temperature when the measured distance between the two tower columns 1 is closest to the width of the joint section 2 is selected as the joint temperature, and when the air temperature reaches the joint temperature, a flexible pulling device 3 is set between the two tower columns 1. The flexible pulling device 3 can pull the two tower columns 1 relative to each other to shorten the distance between the two tower columns 1 until the distance between the two tower columns 1 is equal to the width of the joint section 2. The joint is closed at the joint temperature, and the distance that the tower columns 1 need to move is the smallest. The joint section 2 is installed and welded to the top of the two tower columns 1 to complete the joint. The present invention performs the joint when the distance between the two tower columns 1 is closest to the width of the joint section 2, and then uses the flexible pulling device 3 to adjust the distance between the two tower columns 1 so that the two tower columns 1 can be aligned with the joint section 2, thereby reducing the difficulty of the joint and improving the accuracy of the joint.

[0046] Specifically, the real-time temperature and the distance between the tower columns 1 may be measured every two hours five days before the closure.

[0047] Alternatively, if Figure 5 and Figure 6 As shown, the flexible tensioning device 3 includes a steel strand 31 and a through-hole jack 32 connected to one end of the steel strand 31 , and the steel strand 31 and the through-hole jack 32 are detachably connected to opposite side walls of two tower columns 1 .

[0048] In this embodiment, the flexible tensioning device 3 is configured as a through-hole jack 32 and a steel strand 31 connected to each other, the through-hole jack 32 is detachably connected to the side wall of one of the tower columns 1, and the end of the steel strand 31 away from the through-hole jack 32 is detachably connected to the side wall of the other tower column 1. The two side walls are arranged opposite to each other. When the two tower columns 1 need to be closed, the through-hole jack 32 and the steel strand 31 are connected to the two tower columns 1, and the through-hole jack 32 works to pull the steel strand 31 to contract, so that the two tower columns 1 move relative to each other, shortening the distance between the two tower columns 1 until the distance between the two tower columns 1 is equal to the width of the closing section 2.

[0049] Alternatively, if Figure 6 As shown, the flexible tensioning device 3 also includes an anchor box 33, one end of the steel strand 31 away from the through-hole jack 32 and the through-hole jack 32 are respectively arranged in the two anchor boxes 33, and the opposite ends of the two anchor boxes 33 are provided with ear plates 331, and the opposite sides of the two tower columns 1 are provided with ear seats 34, and the adjacent ear seats 34 and the ear plates 331 are detachably connected.

[0050] In this embodiment, the through-hole jack 32 and the end of the steel strand 31 away from the through-hole jack 32 are both arranged in the anchor box 33, and ear plates 331 are arranged at the ends of the two anchor boxes 33 facing the adjacent tower columns 1, and ear seats 34 are arranged on the opposite side walls of the two tower columns 1. The ear plates 331 and the ear seats 34 are used in conjunction with each other and are detachably connected. The anchor box 33 can be connected to the tower column 1, providing a connection structure for the through-hole jack 32, the steel strand 31 and the tower column 1.

[0051] Specifically, the ear seats 34 on the two tower columns 1 are located at the same height, so that the two tower columns 1 are only subjected to horizontal tension.

[0052] Alternatively, if Figure 6 As shown, the ear plate 331 and the ear seat 34 are connected by a pin shaft 35 , and the pin shaft 35 extends in a horizontal direction. The ear plate 331 and the ear seat 34 are used to rotate relative to each other around the pin shaft 35 .

[0053] In this embodiment, the ear plate 331 is connected to the ear seat 34 by the pin 35. For example, a connecting hole extending in the horizontal plane is provided on the ear plate 331 and the ear seat 34. The pin 35 passes through the connecting hole to connect the ear plate 331 and the ear seat 34 together. The pin 35 also extends in the horizontal direction, that is, extends in the Y-axis direction. The ear plate 331 and the ear seat 34 can both rotate around the pin 35. In the process of pulling the two tower columns 1, since the bottom of the tower column 1 cannot move, the top of the tower column 1 is pulled, causing the angle between the tower column 1 and the anchor box 33 and the steel strand 31 to change. The rotation of the ear plate 331 and the ear seat 34 makes the steel strand 31 and the anchor box 33 always extend in the horizontal direction, and the tower column 1 is always only subjected to horizontal tension.

[0054] Alternatively, if Figure 2 As shown, the S4 includes:

[0055] S41, providing matching pieces 4 on the ends of the two tower columns 1 and the two ends of the joint section 2;

[0056] S42, hoisting and placing the two ends of the joint section 2 on the end faces of the two tower columns 1 respectively, and adjusting the position of the joint section 2 until the two matching pieces 4 at the same end are aligned with each other;

[0057] S43, connecting the matching parts 4 that fit each other together;

[0058] S44, welding the two ends of the joint section 2 to the two tower columns 1 respectively.

[0059] In this embodiment, matching parts 4 are provided at both ends of the joint section 2 and the ends of the two tower columns 1, and then the joint section 2 is hoisted above the two tower columns 1, and is further hoisted until the end of the joint section 2 is placed on the end of the tower column 1, and the position of the joint section 2 is fine-tuned until the matching parts 4 at the end of the joint section 2 are aligned with the matching parts 4 at the end of the tower column 1, and the two fitted matching parts 4 are connected together, and the joint section 2 and the tower column 1 are pre-fixed to avoid positional displacement of the joint section 2 and the tower column 1 during subsequent welding, and finally the joint section 2 and the tower column 1 are welded together to complete the joint.

[0060] Specifically, the matching piece 4 can be welded to the end of the joint section 2 or the end of the tower column 1 .

[0061] Alternatively, if Figure 7 As shown, the matching piece 4 is an annular structure, which is used to be sleeved on the circumferential surface of the tower column or the joint section. A perforated plate 42 is vertically extended from the circumferential outer surface of the annular structure, and the perforated plates 42 of the two matching pieces 4 that fit together are used to be connected by pins.

[0062] In this embodiment, the matching piece 4 is set as an annular structure, which can be sleeved on the circumferential side surface of the end of the tower column 1 or the joint section 2. A perforated plate 42 extending in the horizontal plane is provided on the circumferential side of the annular structure. When the joint section 2 is placed on the tower column 1, the perforated plates 42 of the two matching pieces 4 abut against each other, and the holes on the perforated plates 42 are aligned. A pin can be used to pass through the holes on the perforated plates 42 to connect the two matching pieces 4 together, thereby pre-fixing the joint section 2 and the tower column 1.

[0063] Specifically, the annular structure may be provided with a plurality of perforated plates 42 evenly distributed along its circumference.

[0064] Alternatively, if Figure 3 As shown, the S44 includes the following steps:

[0065] S441, selecting a plurality of welding points evenly distributed around the end of the joint section 2, and spot-welding the two ends of the joint section 2 to the two tower columns 1 respectively;

[0066] S442, welding the parts between the adjacent welding points.

[0067] In this embodiment, a plurality of welding points are evenly distributed in the circumferential direction on the end of the joint section 2, and these welding points are first welded to perform preliminary welding on the joint section 2 and the tower column 1. The preliminary welding serves as a pre-fixing function to reduce the welding deformation, and then welding is performed on adjacent positions between the welding points to complete the welding of the joint section 2 and the tower column 1.

[0068] Alternatively, if Figure 8 As shown, symmetrical welding is adopted when welding the parts between adjacent welding points.

[0069] In this embodiment, symmetrical welding is adopted between adjacent welding points. For example, c is a welding point. After the six welding points c are all welded, the d1 area is welded first, and then the d2 area which is symmetrical with the center of the d1 area is welded. Then the d3, d4, d5, and d6 areas are welded in sequence. Such symmetrical welding can reduce the welding deformation and improve the welding quality.

[0070] Optionally, the closure section 2 is hoisted by a floating crane.

[0071] In this embodiment, the closure section 2 is hoisted by a floating crane of a crane ship, so as to facilitate closure when building a bridge on waters.

[0072] Alternatively, if Figure 4 As shown, the measuring distance between two tower columns 1 of the steel tower includes: selecting the closest points on the end faces of the two tower columns 1, namely the first measuring point and the second measuring point, and measuring the distance between the first measuring point and the second measuring point.

[0073] In this embodiment, by selecting the closest points on the end faces of the two tower columns 1 , as well as the first measuring point a and the second measuring point b, the distance between a and b is measured to be the distance between the two tower columns 1 .

[0074] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A method for closing a steel tower of a landscape bridge, characterized in that: The steps include: S1, continuously measuring the real-time air temperature and the distance between the two tower columns (1) of the steel tower for several consecutive days; S2, selecting the temperature at which the measured spacing is closest to the width of the closure section (2) as the closure temperature; S3, at the closure temperature, a flexible tensioning device (3) is arranged between the two tower columns (1), and the flexible tensioning device (3) is used to shorten the distance between the two tower columns (1), so that the distance between the two tower columns (1) is equal to the width of the closure section (2); S4, installing and welding the joint section (2) on the two tower columns (1).

2. The method for closing the steel tower of a landscape bridge according to claim 1, characterized in that: The flexible tensioning device (3) comprises a steel strand (31) and a through-hole jack (32) connected to one end of the steel strand (31); the steel strand (31) and the through-hole jack (32) are respectively detachably connected to opposite side walls of the two tower columns (1).

3. The method for closing the steel tower of a landscape bridge according to claim 2 is characterized in that: The flexible tensioning device (3) also includes an anchor box (33), one end of the steel strand (31) away from the through-hole jack (32) and the through-hole jack (32) are respectively arranged in two of the anchor boxes (33), and the two ends of the two anchor boxes (33) facing away from each other are provided with ear plates (331), and the opposite sides of the two tower columns (1) are provided with ear seats (34), and the adjacent ear seats (34) and the ear plates (331) are detachably connected.

4. The method for closing the steel tower of a landscape bridge according to claim 3 is characterized in that: The ear plate (331) and the ear seat (34) are connected via a pin shaft (35). The pin shaft (35) extends in a horizontal direction. The ear plate (331) and the ear seat (34) are used to rotate relative to each other around the pin shaft (35).

5. The method for closing the steel tower of a landscape bridge according to claim 1, characterized in that: The S4 includes: S41, providing matching pieces (4) on the ends of the two tower columns (1) and the two ends of the joint section (2); S42, hoisting and placing the two ends of the joint section (2) on the end faces of the two tower columns (1) respectively, and adjusting the position of the joint section (2) until the two matching pieces (4) at the same end are aligned and fitted; S43, connecting the matching parts (4) that fit each other together; S44, welding the two ends of the joint section (2) to the two tower columns (1) respectively.

6. The method for closing the steel tower of a landscape bridge according to claim 5, characterized in that: The matching piece (4) is an annular structure, which is used to be sleeved on the peripheral surface of the tower column (1) or the joint section (2), and a perforated plate (42) is vertically extended on the peripheral outer surface of the annular structure. The perforated plates (42) of the two matching pieces (4) that are fitted together are used to be connected by pins.

7. The method for closing the steel tower of a landscape bridge according to claim 6, characterized in that: The S44 comprises the following steps: S441, selecting a plurality of welding points evenly distributed around the circumference of the end of the joint section (2), and spot-welding the two ends of the joint section (2) to the two tower columns (1) respectively; S442, welding the parts between the adjacent welding points.

8. The method for closing the steel tower of a landscape bridge according to claim 7, characterized in that: Symmetrical welding is adopted when welding the parts between the adjacent welding points.

9. The method for closing the steel tower of a landscape bridge according to claim 6, characterized in that: The joint section (2) is hoisted by a floating crane.

10. The method for closing the steel tower of a landscape bridge according to claim 1, characterized in that: The measuring of the distance between two tower columns (1) of the steel tower comprises: selecting points on the end faces of the two tower columns (1) that are closest to each other, namely a first measuring point and a second measuring point, respectively, and measuring the distance between the first measuring point and the second measuring point.

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