A method for installing a steel truss member

Abstract

The present invention discloses a method for installing steel truss beam members. A turning device and a lifting device are pre-installed between the diagonal beam and the truss bridge segment. The lifting device drives the diagonal beam to offset at a certain angle relative to the truss bridge segment to avoid interference between a portion of the diagonal beam extending outside the truss bridge segment and another adjacent truss bridge segment. After two adjacent truss bridge segments are hoisted to the installation position, the lifting device releases the diagonal beam to complete the installation and fixation between the two ends of the diagonal beam and the two truss bridge segments, thereby achieving a one-time hoisting of the diagonal beam following the truss bridge segment to complete the hoisting operation without hoisting interference. This not only ensures the stability of the connection between the truss bridge segments under the premise of the size structure, but also improves the efficiency of assembling and connecting the truss bridge segments, avoids the need to set up an additional working platform, improves the applicability of the operation, and reduces the difficulty of hoisting.

Description

Technical Field

[0001] The present application relates to the technical field of steel structure bridge manufacturing and construction, and in particular to a method for installing steel truss beam members. Background Art

[0002] The proportion of steel structure bridges is getting higher and higher, and the application of various types of bridge steel structures is becoming more and more abundant. Among them, one type of truss bridge is affected by the capacity of the lifting equipment (cable-mounted crane) and the structural form, and the installation of the web members on both sides of the ring mouth of the truss bridge segment is difficult.

[0003] The conventional solution uses special lifting equipment (cable-mounted crane) for lifting. During the operation, the diagonal webs at the segment ring mouth exceed the displacement adjustment amount of the segment along the bridge direction due to their structure. The conventional solution is to lift the segment and then lift the diagonal webs for the second time. This is not only inefficient and costly, but the sizes of the diagonal webs are too tight and need to meet the requirements of the auxiliary working platform during the secondary lifting process before operation can be carried out, which has a high lifting safety risk. Summary of the invention

[0004] In view of the defects existing in the prior art, the present application provides a method for installing a steel truss beam member to solve the problem that the installation of the diagonal web members is difficult and the installation conditions are harsh during the hoisting of the truss bridge segment in the prior art.

[0005] The above-mentioned purpose of the present invention is mainly achieved through the following technical solutions:

[0006] A method for installing a steel truss member, the method comprising:

[0007] Take the truss bridge segment;

[0008] Making a flipping device, and using the flipping device to rotatably connect the diagonal web member to the truss bridge segment;

[0009] Taking a lifting device and installing it on the truss bridge segment;

[0010] Operating the lifting device to lift the end of the diagonal web member away from the flipping device, and causing the diagonal web member to rotate around the flipping device until the end of the diagonal web member away from the flipping device is vertically staggered with the segment ring of the adjacent truss bridge segment;

[0011] Lifting truss bridge segments to the bridge assembly position;

[0012] The lifting device is operated to release the diagonal web member, and after the diagonal web member is reversely rotated and reset, one end of the diagonal web member away from the flipping device is fixedly connected to the adjacent truss bridge segment.

[0013] Furthermore, after one end of the diagonal web member away from the flipping device is fixedly connected to the adjacent truss bridge segment, the other end of the diagonal web member is fixedly connected to the truss bridge segment, the flipping device is removed, and a fixed connector is installed at the installation position of the flipping device.

[0014] Furthermore, the turnover device is installed on the side wall of the diagonal web located on the outside of the bridge body.

[0015] Furthermore, the flipping device includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are rotatably connected, the first connecting part is used to be fixed to the diagonal web member through a plurality of positioning bolts, and the second connecting part is used to be fixed to the truss bridge segment through a plurality of positioning bolts.

[0016] Furthermore, a first support plate is vertically provided on the first connection portion, two second support plates are vertically provided on the second connection portion, and the two second support plates are clamped on both sides of the first support plate, and a rotating rod is penetrated through the first support plate and the second support plate.

[0017] Further, the length of the first support plate is greater than the length of the first connecting portion, and the length of the second support plate is greater than the length of the second connecting portion.

[0018] Furthermore, reinforcing ribs are provided between the first support plate and the first connecting portion, and between the second support plate and the second connecting portion, respectively.

[0019] Furthermore, two flipping devices are provided and are arranged on the same side of the diagonal web member and the truss bridge segment.

[0020] Furthermore, the lifting device is installed on the side wall of the truss bridge segment located outside the bridge body.

[0021] Furthermore, the lifting device adopts a hand winch.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] The present invention is based on the traditional technology and the structural characteristics of steel trusses. By pre-installing a turning device and a lifting device between the diagonal web member and the truss bridge segment, the turning device and the lifting device are used to temporarily fix the diagonal web member before the truss bridge segment is hoisted. When the truss bridge segment is hoisted as a whole, the lifting device drives the diagonal web member to deviate at a certain angle relative to the truss bridge segment until the diagonal web member is staggered with the segment ring opening of the adjacent truss bridge segment, so as to avoid the part of the diagonal web member extending outside the truss bridge segment from being offset from another adjacent truss bridge segment. Interference will not occur, and after two adjacent truss bridge segments are hoisted to the installation position, the lifting equipment releases the diagonal web, and the installation and fixation between the two ends of the diagonal web and the two truss bridge segments are completed, so that the diagonal web is hoisted once following the truss bridge segment, and the hoisting operation can be completed without hoisting interference. This not only ensures the stability of the connection between the truss bridge segments under the premise of this size structure, but also improves the efficiency of the assembly and connection of the truss bridge segments, avoids the need to set up an additional working platform, improves the applicability of the operation, and reduces the difficulty of hoisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A front view of a truss bridge segment provided by an embodiment of the present application;

[0026] Figure 2 A top view of a truss bridge segment during installation provided by an embodiment of the present application;

[0027] Figure 3 A front view of a truss bridge segment during installation provided by an embodiment of the present application;

[0028] Figure 4 A schematic diagram of the structure of a flip device provided in an embodiment of the present application;

[0029] Figure 5 A side view of a flipping device provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of a state where a front diagonal web member is installed in a truss bridge segment provided in an embodiment of the present application;

[0031] Figure 7 A schematic diagram of the state of the diagonal web member after the truss bridge segment provided in the embodiment of the present application is installed;

[0032] Figure 8A flow chart of a method for installing a steel truss member provided in an embodiment of the present application;

[0033] In the figure: 1. Truss bridge segment; 11. Segment ring; 2. Turning device; 21. First connection part; 22. Second connection part; 23. First support plate; 24. Second support plate; 25. Rotating rod; 3. Diagonal web member; 31. Temporary support member; 4. Lifting equipment. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0035] like Figure 1-8 As shown, a method for installing a steel truss member comprises:

[0036] Take truss bridge segment 1, prefabricate truss bridge segment 1 according to relevant requirements of bridge design, and hoist and connect them in sequence according to the installation sequence of truss bridge segment 1.

[0037] A flipping device 2 is manufactured, and the diagonal web member 3 is rotatably connected to the truss bridge segment 1 through the flipping device 2. Before the truss bridge segment 1 is installed, one end of the diagonal web member 3 is installed on the truss bridge segment 1 through the flipping device 2 so that it can be hoisted together with the truss bridge segment 1.

[0038] The lifting device 4 is installed on the truss bridge segment 1 , and the lifting end of the lifting device 4 is connected to the end of the diagonal web member 3 away from the turning device 2 .

[0039] Operate the lifting device 4 to pull the diagonal brace 3 and rotate the diagonal brace 3 around the flipping device 2 until the end of the diagonal brace 3 away from the flipping device 2 is staggered in the vertical direction with the segment ring 11 of the adjacent truss bridge segment 1, effectively avoiding interference between one end of the diagonal brace 3 and another truss bridge segment 1 to be spliced ​​during the lifting process, affecting the lifting process and the alignment of the two truss bridge segment 1 brackets. In order to ensure the stability of the diagonal brace 3 during the lifting of the truss bridge segment 1, after the diagonal brace 3 is rotated a certain angle by the lifting device 4, a temporary support 31 can be set between the end of the diagonal brace 3 away from the flipping device 2 and the truss bridge segment 1 where the diagonal brace 3 is located, so as to avoid uncontrollable swinging of the diagonal brace 3 between the flipping device 2 and the truss bridge segment 1, thereby improving the stability and safety of the lifting process. The temporary support 31 can temporarily fix the diagonal brace 3 and the truss bridge segment 1 by electric welding.

[0040] Lift truss bridge segment 1 to the bridge assembly position.

[0041] Operate the lifting device 4 to release the diagonal web member 3, and the diagonal web member 3 rotates in the opposite direction and resets under the action of gravity, so that the end of the diagonal web member 3 away from the flipping device 2 is located at the connection position of another adjacent truss bridge segment 1, and the end of the diagonal web member 3 away from the flipping device 2 is fixedly connected to the adjacent truss bridge segment 1.

[0042] The operating principle of this embodiment is: based on the traditional process and the structural characteristics of the steel truss, by pre-installing the turning device 2 and the lifting device 4 between the diagonal web member 3 and the truss bridge segment 1, before the truss bridge segment 1 is hoisted, the turning device 2 and the lifting device 4 are used to temporarily fix the diagonal web member 3, and when the truss bridge segment 1 is hoisted as a whole, the lifting device 4 drives the diagonal web member 3 to deviate at a certain angle relative to the truss bridge segment 1 until the diagonal web member 3 is staggered with the segment ring 11 of the adjacent truss bridge segment 1, so as to avoid the part of the diagonal web member 3 extending outside the truss bridge segment 1 from colliding with the other adjacent truss bridge segment 1. Interference occurs between the truss bridge segments 1, and after two adjacent truss bridge segments 1 are hoisted to the installation position, the lifting equipment 4 releases the diagonal web 3, and completes the installation and fixation between the two ends of the diagonal web 3 and the two truss bridge segments 1, so that the diagonal web 3 follows the truss bridge segment 1 for one hoisting, and the hoisting operation can be completed without hoisting interference. This not only ensures the stability of the connection between the truss bridge segments 1 under the premise of this size structure, but also improves the efficiency of the assembly and connection of the truss bridge segments 1, avoids the need to set up an additional working platform, improves the applicability of the operation, and reduces the difficulty of hoisting.

[0043] Furthermore, on the basis of the above embodiment, after one end of the diagonal web member 3 away from the flipping device 2 is fixedly connected to the adjacent truss bridge segment 1, the other end of the diagonal web member 3 is fixedly connected to the truss bridge segment 1, the flipping device 2 is removed, and a fixed connecting piece is installed at the installation position of the flipping device 2.

[0044] The flipping device 2 is installed at the installation position of the diagonal member 3 and the installation position on the truss bridge segment 1, avoiding the need to open additional installation holes on the diagonal member 3 and the truss bridge segment 1, maintaining the structural strength of the diagonal member 3 and the truss bridge segment 1, saving processing steps and reducing costs. The flipping device 2 can only be used as a connecting piece during the rotation of the diagonal member 3, reducing the strength requirement of the flipping device 2, and using a special connecting piece for fixed connection to maintain the stability of the force during long-term connection.

[0045] Furthermore, on the basis of the above-mentioned embodiment, the flipping device 2 is installed on the side wall of the diagonal web member 3 located on the outside of the bridge body. When the diagonal web member 3 is rotated relative to the truss bridge segment 1 through the flipping device 2, the diagonal web member 3 has a certain thickness so that the diagonal web member 3 can be rotated toward the outside of the bridge body, thereby avoiding interference with the internal structure of the truss bridge segment 1 after the diagonal web member 3 is rotated toward the inside of the bridge body, thereby improving operational convenience.

[0046] Furthermore, based on the above embodiment, the flipping device 2 includes a first connection part 21 and a second connection part 22, and the first connection part 21 and the second connection part 22 are rotatably connected. The first connection part 21 is used to be fixed to the diagonal web member 3 through a plurality of positioning bolts, and the second connection part 22 is used to be fixed to the truss bridge segment 1 through a plurality of positioning bolts. Relatively speaking, the flipping device 2 can adopt a rotating connection structure of another structural form, and no specific structural limitation is made here.

[0047] Further, on the basis of the above embodiment, a first support plate 23 is vertically provided on the first connecting portion 21, two second support plates 24 are vertically provided on the second connecting portion 22, and the two second support plates 24 are clamped on both sides of the first support plate 23, and a rotating rod 25 is penetrated through the first support plate 23 and the second support plate 24.

[0048] In order to further improve the structural stability of the flipping device 2, after the first connection part 21 is stably connected to the diagonal web member 3 and the second connection part 22 is stably connected to the truss bridge segment 1, the first support plate 23 and the second support plate 24 are connected between the first connection part 21 and the second connection part 22, and the rotating rod 25 simultaneously penetrates the first connection part 21 and the second connection part 22 to realize relative rotation. The two second support plates 24 are clamped on both sides of the first support plate 23 to avoid axial displacement of the first support plate 23 and the second support plate 24 along the rotating rod 25, thereby maintaining a stable relative position.

[0049] Further, based on the above embodiment, the length of the first supporting plate 23 is greater than the length of the first connecting portion 21 , and the length of the second supporting plate 24 is greater than the length of the second connecting portion 22 .

[0050] When the first connection part 21 and the second connection part 22 are located on the same plane, one end of the first support plate 23 and the second support plate 24 extend to the outside of the first connection part 21 and the second connection part 22 respectively, avoiding contact and interference between the first connection part 21 and the second connection part 22, and ensuring that the diagonal web member 3 will not be scratched by the truss bridge segment 1 during rotation.

[0051] Furthermore, based on the above embodiment, reinforcing ribs are respectively provided between the first support plate 23 and the first connecting portion 21 and between the second support plate 24 and the second connecting portion 22 to improve the connection strength between the first connecting portion 21 and the first support plate 23 and the connection strength between the second connecting portion 22 and the second support plate 24.

[0052] Furthermore, based on the above embodiment, two flipping devices 2 are provided and are arranged on the same side of the diagonal web member 3 and the truss bridge segment 1 at the same time, so as to maintain the stability of the diagonal web member 3 during the rotation process, avoid the flipping device 2 from being torn, and maintain the effectiveness of the connection during the installation process.

[0053] Furthermore, on the basis of the above-mentioned embodiment, the lifting device 4 is installed on the side wall of the truss bridge segment 1 located on the outside of the bridge body, that is, in the vertical direction, the lifting device 4 is located on the outside of the center line of the diagonal web member 3, so that the diagonal web member 3 can be rotated toward the outside of the bridge body, avoiding interference with the internal structure of the truss bridge segment 1 after the diagonal web member 3 is rotated toward the inside of the bridge body, thereby improving the convenience of operation.

[0054] Furthermore, on the basis of the above-mentioned embodiment, the lifting device 4 adopts a hand chain hoist. As an upgraded version of the fixed pulley, the hand chain hoist completely inherits the advantages of the fixed pulley, and adopts a combination of a reducer with a reverse check brake and a chain pulley set, and a symmetrically arranged secondary spur gear rotation structure, which is simple, durable and efficient. In the actual lifting operation, the hand chain hoist pulls the manual chain and the hand chain wheel to rotate, and the friction plate ratchet and the brake seat are pressed into one body and rotated together, and the tooth major axis rotates the plate gear, the tooth minor axis and the spline hole gear. In this way, the lifting sprocket installed on the spline hole gear drives the lifting chain, thereby lifting the heavy object smoothly. The ratchet friction plate one-way brake is adopted, which can brake automatically under load, and the ratchet engages with the ratchet under the action of the spring, and the brake works safely.

[0055] It should be understood that the terms first, second, etc. are only used to distinguish descriptions and should not be understood as indicating or suggesting relative importance. Although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit may be referred to as the second unit, and similarly, the second unit may be referred to as the first unit without departing from the scope of the exemplary embodiments of the present invention.

[0056] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another relationship between associated objects, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0057] It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside" and the like indicate orientations or positional relationships that are customarily placed when the disclosed product is used, or are orientations or positional relationships that are customarily understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] The terms used herein are only used to describe specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates the opposite meaning. It should also be understood that the terms "include", "comprising", "including", and / or "comprising" when used herein specify the existence of the claimed features, integers, steps, operations, units, and / or components, and do not exclude the existence or increase of one or more other features, quantities, steps, operations, units, components, and / or their combinations.

[0060] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, it should be understood by those of ordinary skill in the art that the exemplary embodiments may be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid making the exemplary embodiments unclear.

[0061] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for installing a steel truss member, characterized in that: The installation method comprises: Take the truss bridge segment; Making a flipping device, and using the flipping device to rotatably connect the diagonal web member to the truss bridge segment; Taking a lifting device and installing it on the truss bridge segment; Operating the lifting device to lift the end of the diagonal web member away from the flipping device, and causing the diagonal web member to rotate around the flipping device until the end of the diagonal web member away from the flipping device is vertically staggered with the segment ring of the adjacent truss bridge segment; Hoisting truss bridge segments to the bridge assembly position; The lifting device is operated to release the diagonal web member, and after the diagonal web member is reversely rotated and reset, one end of the diagonal web member away from the flipping device is fixedly connected to the adjacent truss bridge segment.

2. The method for installing a steel truss member according to claim 1, characterized in that: After one end of the diagonal web member away from the flipping device is fixedly connected to the adjacent truss bridge segment, the other end of the diagonal web member is fixedly connected to the truss bridge segment, the flipping device is removed, and a fixed connector is installed at the installation position of the flipping device.

3. The method for installing a steel truss member according to claim 1, characterized in that: The turning device is installed on the side wall of the diagonal web member located outside the bridge body.

4. The method for installing a steel truss member according to claim 1, characterized in that: The flipping device includes a first connection part and a second connection part, the first connection part and the second connection part are rotatably connected, the first connection part is used to be fixed to the diagonal web member through a plurality of positioning bolts, and the second connection part is used to be fixed to the truss bridge segment through a plurality of positioning bolts.

5. The method for installing a steel truss member according to claim 4, characterized in that: A first support plate is vertically disposed on the first connection portion, two second support plates are vertically disposed on the second connection portion, and the two second support plates are clamped on both sides of the first support plate, and a rotating rod is penetrated through the first support plate and the second support plate.

6. The method for installing a steel truss member according to claim 5, characterized in that: The length of the first support plate is greater than the length of the first connecting portion, and the length of the second support plate is greater than the length of the second connecting portion.

7. The method for installing a steel truss member according to claim 5, characterized in that: Reinforcement ribs are respectively provided between the first support plate and the first connection portion and between the second support plate and the second connection portion.

8. The method for installing a steel truss member according to claim 1, characterized in that: The flipping devices are provided with two and are arranged on the same side of the diagonal web member and the truss bridge segment.

9. The method for installing a steel truss member according to claim 1, characterized in that: The lifting device is installed on the side wall of the truss bridge segment located outside the bridge body.

10. The method for installing a steel truss member according to claim 1, characterized in that: The lifting device adopts a hand chain hoist.

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