Steel box girder temporary locking device capable of being adjusted in self-adaptive mode

Abstract

The invention discloses a steel box girder temporary locking device capable of being adjusted in a self-adaptive mode, and relates to the field of suspension bridge steel girder construction, the device comprises at least one locking piece and at least two restraining devices, one end of the locking piece is used for being fixedly connected with the top of a secondary end beam, and the other end of the locking piece is used for extending in the direction of the end beam; the at least two restraining devices are used for being arranged at the top of the end beam at intervals, the two restraining devices have set heights in the vertical direction so as to form a sliding way allowing the other end of the locking piece to slide in the vertical direction, and the locking piece and the restraining devices are fixed in the relative position in the longitudinal bridge direction. The locking piece and the restraining device are fixed to the end beam and the secondary end beam respectively, and the restraining device and the locking piece can slide relatively in the vertical direction and keep fixed in the longitudinal bridge direction, so that the connecting stability of the end beam and the secondary end beam can be guaranteed, and meanwhile the restraining device and the locking piece are fixed. And self-adaptive adjustment can be carried out when the height difference between the beam sections of the end beam and the secondary end beam is gradually reduced along with continuous erection of the midspan.

Description

Technical Field

[0001] The invention relates to the technical field of suspension bridge steel beam construction, and in particular to a temporary locking device for a steel box beam which can be adjusted adaptively. Background Art

[0002] Normally, after the steel box girder section of a suspension bridge is hoisted into place, it is necessary to make a temporary connection with the adjacent beam sections, use pins to adjust the plates to the wrong sides, and tighten the top plate temporary connection tension screws to the designed seam width before fixing.

[0003] However, after a certain section of the steel box girder on the middle span side is erected, the main cable line shape does not reach the designed line shape. At this time, there will be a certain height difference between the end beam on the tower side and the secondary end beam, which makes it impossible to use pins and tension screws for temporary connection between the beam sections. After the secondary end beam is connected to the sling, it will overturn due to the shift of the center of gravity; and the height difference between the end beam and the secondary end beam will gradually decrease as the middle span continues to be erected. The traditional temporary locking cannot meet the function of adjusting with the change of height difference. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide an adaptively adjustable temporary locking device for steel box beams to solve the problems in the prior art that temporary locking of end beams and secondary end beams is inconvenient and the locking cannot be adjusted according to changes in height differences.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] The present application provides a temporary locking device for a steel box beam that can be adjusted adaptively, comprising:

[0007] at least one locking member, one end of which is used to be fixedly connected to the top of the secondary end beam, and the other end of which is used to extend toward the end beam;

[0008] At least two restraining devices are arranged at intervals on the top of the end beam, and the two restraining devices have a set height in the vertical direction to form a slideway for the other end of the locking member to slide in the vertical direction, and the relative positions of the locking member and the restraining device in the longitudinal bridge direction are fixed.

[0009] In some optional embodiments, the locking member includes:

[0010] A tensioning screw rod, one end of which is used for fixed connection with the top of the secondary end beam, and the other end of which passes through the above-mentioned slideway;

[0011] The locking nut is threadably matched with the other end of the tension screw rod and abuts against the side of the restraining device away from the secondary end beam.

[0012] In some optional embodiments, a limiting mechanism is further included, which is used to be fixedly arranged on the top of the end beam and to be pressed on the top of the secondary end beam.

[0013] In some optional embodiments, the above-mentioned limiting mechanism includes:

[0014] A support member, which is used to be vertically set up on the top of the end beam;

[0015] A holding member, one end of which is connected to the supporting member, and the other end of which is used to extend toward the secondary end beam;

[0016] A cushion block assembly is cushioned between the holding member and the top of the secondary end beam.

[0017] In some optional embodiments, the above-mentioned limiting mechanism also includes a limiting diagonal brace and a holding diagonal brace, one end of the above-mentioned limiting diagonal brace is connected to the above-mentioned support member, and the other end is used to connect to the top of the above-mentioned end beam, one end of the above-mentioned holding diagonal brace is connected to the above-mentioned support member, and the other end is connected to the above-mentioned holding member.

[0018] In some optional embodiments, the pad assembly includes a plurality of pads of different thicknesses, and the pads are used to adapt according to the distance between the holding member and the top of the secondary end beam and to be cushioned between the holding member and the top of the secondary end beam.

[0019] In some optional embodiments, a connecting mechanism is further included, which is used to connect the above-mentioned limiting mechanism with all the above-mentioned restraining devices.

[0020] In some optional embodiments, a connecting brace is further provided between the restraining device and the top of the end beam, one end of which is connected to the restraining device and the other end is used to be connected to the top of the end beam.

[0021] In some optional embodiments, two adjacent restraint devices are connected in series via a shoulder strap to fix the relative positions of the two adjacent restraint devices.

[0022] In some optional embodiments, the above-mentioned limiting mechanisms are provided with two groups, which are respectively arranged on both sides of the transverse bridge direction of all the above-mentioned restraining devices.

[0023] On the basis of the above technical solution, compared with the prior art, the advantages of the present invention are:

[0024] By fixing the locking part and the restraining device on the end beam and the secondary end beam respectively, and the restraining device and the locking part can slide relative to each other in the vertical direction and remain fixed in the longitudinal direction of the bridge, it is possible to ensure the connection stability of the end beam and the secondary end beam while making it possible to make adaptive adjustments when the height difference between the end beam and the secondary end beam section gradually becomes smaller as the middle span continues to be erected. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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.

[0026] Figure 1 It is a top view schematic diagram of a temporary locking device for a steel box girder that can be adjusted adaptively according to the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the longitudinal bridge structure;

[0028] Figure 3 for Figure 1 Schematic diagram of the cooperation between the middle locking member and the restraining device;

[0029] Figure 4 for Figure 1 Schematic diagram of the structure of the middle limit mechanism.

[0030] In the figure: 1. Locking part; 11. Tension screw; 12. Locking nut; 2. Restraining device; 21. Connecting brace; 3. Limiting mechanism; 31. Support member; 32. Holding member; 33. Pad; 34. Limiting brace; 35. Holding brace; 4. End beam; 5. Secondary end beam; 6. Connecting mechanism; 7. Shoulder strap. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0033] like Figure 1 and Figure 3As shown, the present application provides an adaptively adjustable temporary locking device for a steel box girder, comprising at least one locking member 1 and at least two restraining devices 2, wherein the locking member 1 and the restraining devices 2 are respectively fixed on the end beam 4 and the secondary end beam 5, and after the restraining device 2 is connected to the locking member 1, the locking member 1 can slide relative to the restraining device 2 in the vertical direction and remain fixed in the longitudinal direction of the bridge, thereby ensuring the connection stability between the end beam 4 and the secondary end beam 5 while being able to perform adaptive adjustment when the height difference between the end beam and the secondary end beam section gradually becomes smaller as the middle span continues to be erected.

[0034] Specifically, there is at least one locking member 1, one end of which is used to be fixedly connected to the top of the secondary end beam 5, and the other end is used to extend in the direction of the end beam 4; there are at least two restraining devices 2, which are used to be arranged at intervals on the top of the end beam 4, and the two restraining devices 2 have a set height in the vertical direction to form a slide for the other end of the locking member 1 to slide in the vertical direction, and the relative positions of the locking member 1 and the restraining device 2 in the longitudinal bridge direction are fixed.

[0035] It can be understood that two adjacent restraining devices 2 are arranged at intervals in the transverse direction of the bridge, and the gap formed between the two restraining devices 2 is a slideway for the locking member 1 to slide in the vertical direction. The other end of the locking member 1 away from the secondary end beam 5 can slide along the slideway in the vertical direction, and the other end of the locking member 1 away from the secondary end beam 5 is fixed relative to the restraining device 2 in the longitudinal direction of the bridge.

[0036] In some optional embodiments, the locking member 1 includes a tension screw 11 and a locking nut 12, one end of the tension screw 11 is used to be fixedly connected to the top of the secondary end beam 5, and the other end passes through the slideway; the locking nut 12 is threadedly matched with the other end of the tension screw 11, and is abutted against the side of the restraint device 2 away from the secondary end beam 5.

[0037] That is to say, the tension screw 11 cooperates with the locking nut 12 to make the locking nut 12 abut against the side of the constraint device 2 away from the secondary end beam 5. This can not only provide a pulling force to bring the end beam 4 and the secondary end beam 5 closer to each other and play a locking role in the longitudinal direction of the bridge, but at the same time, the locking nut 12 and the tension screw 11 slide along the slideway together with the change in the height of the secondary end beam 5.

[0038] In some optional embodiments, such as Figure 4 As shown, the above-mentioned adaptively adjustable steel box beam temporary locking device also includes a limiting mechanism 3, which is used to be fixedly arranged on the top of the end beam 4 and used to be pressed on the top of the secondary end beam 5.

[0039] It can be understood that since the secondary end beam 5 may overturn due to the shift of the center of gravity after being connected to the sling, the limiting mechanism 3 is used to provide a load to press on the top of the secondary end beam 5 through the end beam 4 to prevent the secondary end beam 5 from overturning.

[0040] Optionally, the limiting mechanism 3 is a hydraulic jack, whose fixed end is fixedly connected to the top of the end beam 4, and whose telescopic end extends along the longitudinal bridge direction toward the secondary end beam 5, and is used to press the top of the secondary end beam 5. The telescopic end of the hydraulic jack is extended and retracted in the vertical direction to cooperate with the height difference of the secondary end beam 5 relative to the end beam 4, so as to adapt to the height change of the secondary end beam 5 while preventing the secondary end beam 5 from overturning.

[0041] Preferably, a pressure sensor is provided at the holding end of the hydraulic jack and is connected to the extension and retraction start and stop signal of the hydraulic jack.

[0042] When the pressure sensor measures that the pressure at the holding end is less than or equal to the first set pressure value, the hydraulic jack starts and retracts until the pressure at the holding end is greater than or equal to the second set pressure value.

[0043] The purpose of such arrangement is to be able to make real-time adjustments as the height of the secondary end beam 5 changes, thereby improving construction efficiency.

[0044] Of course, in places where construction conditions are limited and cost issues are also taken into consideration, the limiting mechanism 3 adopts a purely mechanical adjustment method. Specifically, the limiting mechanism 3 includes a support member 31, a holding member 32 and a cushion block assembly. The support member 31 is used to be vertically set up on the top of the end beam 4; one end of the holding member 32 is connected to the support member 31, and the other end is used to extend toward the direction of the secondary end beam 5; the cushion block assembly is cushioned between the holding member 32 and the top of the secondary end beam 5.

[0045] It can be understood that the relative position between the holding member 32 and the supporting member 31 remains unchanged, and how to adjust to the height difference between the secondary end beam 5 and the end beam 4 depends on the padding of the pad assembly. For example, when the height of the secondary end beam 5 is gradually reduced, and the holding member 32 is no longer pressed on the top of the secondary end beam 5, the gap between the holding member 32 and the top of the secondary end beam 5 can be filled by the pad assembly, ensuring that the upward force generated by the imbalance of the secondary end beam 5 is transmitted to the end beam 4 through the pad assembly, the holding member 32 and the supporting member 31.

[0046] The materials used for the pad block assembly can be the on-site own materials, such as wood blocks or steel plates, etc., which are easy to obtain and low in cost, and can adapt to any construction environment.

[0047] In some optional embodiments, the limiting mechanism 3 further includes a limiting diagonal brace 34 and a holding diagonal brace 35, one end of the limiting diagonal brace 34 is connected to the support member 31, and the other end is used to connect to the top of the end beam 4, one end of the holding diagonal brace 35 is connected to the support member 31, and the other end is connected to the holding member 32.

[0048] It can be understood that the limiting diagonal brace 34, the support member 31 and the top surface of the end beam form a triangular structure to improve the structural strength of the support member 31. Similarly, the holding diagonal brace 35, the support member 31 and the holding member 32 form a triangular structure to improve the structural strength of the holding member 32 and the support member 31.

[0049] In this example, the support member 31 , the holding member 32 , the limiting diagonal brace 34 and the holding diagonal brace 35 are all made of steel material and fixed by welding, which is simple to manufacture.

[0050] In some optional embodiments, the pad assembly includes a plurality of pads 33 with different thicknesses, and the pads 33 are used to adapt according to the distance between the holding member 32 and the top of the secondary end beam 5 and to be cushioned between the holding member 32 and the top of the secondary end beam 5.

[0051] It can be understood that in order to better adapt to the height difference between the secondary end beam 5 and the end beam 4, the pad assembly includes a plurality of pads 33 of different thicknesses, so that pads 33 of corresponding thicknesses can be selected as needed and placed between the holding piece 32 and the top surface of the secondary end beam 5.

[0052] Optionally, the cushion block 33 is a wooden block, which has certain structural strength and deformation capacity, and can also prevent the pressing member 32 from causing structural damage when pressing the secondary end beam 5.

[0053] In some optional embodiments, the above-mentioned adaptively adjustable steel box girder temporary locking device also includes a connecting mechanism 6, which is used to connect the above-mentioned limiting mechanism 3 with all the above-mentioned restraining devices 2.

[0054] It can be understood that the connection mechanism 6 connects the limiting mechanism 3 and all the restraining devices 2 to form a whole, thereby enhancing the structural stability of the entire temporary locking device.

[0055] Specifically, the connection mechanism 6 is a channel steel, which connects all the restraining devices 2 and the support members 31 of the limiting mechanism 3 along the transverse bridge direction. The connection method is preferably welding, or through holes are opened at the same height on the restraining device 2 and the support member 31, and one channel steel passes through the through holes on all the restraining devices 2 and the support member 31 at the same time to achieve connection.

[0056] In this example, three restraining devices 2 are provided at intervals in the transverse direction of the bridge, and two locking members 1 are provided accordingly, and the end of the locking member 1 away from the secondary end beam 5 is located between two gaps formed by the three restraining devices 2. Two limiting mechanisms 3 are provided, which are respectively located on both sides of the transverse direction of all restraining devices 2. The connecting mechanism 6 is a plurality of channel steels, which respectively connect two adjacent structural members.

[0057] In some optional embodiments, a connecting brace 21 is further provided between the restraining device 2 and the top of the end beam 4 , one end of which is connected to the restraining device 2 , and the other end is used to be connected to the top of the end beam 4 .

[0058] Similarly, the purpose of connecting the diagonal braces 21 is to improve the structural strength of the restraint device 2 .

[0059] In some optional embodiments, two adjacent restraint devices 2 are connected in series via a shoulder strap 7 to fix the relative positions of the two adjacent restraint devices 2 .

[0060] During processing, all the restraint devices 2 can be connected in series through the straps 7 to form a whole, which is convenient for transportation and installation.

[0061] The restraint device 2 and the shoulder strap 7 are both made of steel material and connected by welding. The shoulder strap 7 is made of industrial steel as the main body and the channel steel as the auxiliary steel frame system.

[0062] In some optional embodiments, the adaptively adjustable steel box girder temporary locking device of the present application is arranged in plurality along the transverse direction of the bridge, thereby further locking the end beam 4 and the secondary end beam 5.

[0063] The working principle of the embodiment of the present application is as follows: at least two restraint devices 2 are connected in series through the shoulder strap 7 to form a whole, and then transported to the construction site, and the whole is hoisted to the top surface of the end beam 4 by using a lifting device, and welded and fixed. Then, after the secondary end beam 5 is lifted into place, the tension screw 11 fixed on the top of the secondary end beam 5 is passed between two adjacent restraint devices 2, and the tension screw 11 and the restraint device 2 are fixed in the relative position in the longitudinal bridge direction by the locking nut 12. The limiting mechanism 3 is fixed to the top of the end beam 4, and the cushion block 33 is cushioned so that the holding member 32 is pressed on the top of the secondary end beam 5 through the cushion block 33 to prevent the secondary end beam from overturning. Finally, the above-mentioned limiting mechanism 3 is connected to all the restraint devices 2 by using the connecting mechanism 6. When the height between the secondary end beam 5 and the end beam 4 gradually becomes smaller as the middle span continues to be erected, the corresponding cushion block 33 is replaced so that the holding member 32 always provides a holding force for the secondary end beam 5.

[0064] The present invention provides an adaptively adjustable temporary locking device for a steel box beam. The locking member 1 and the restraining device 2 are respectively fixed on the end beam 4 and the secondary end beam 5. The restraining device 2 and the locking member 1 can slide relative to each other in the vertical direction and remain fixed in the longitudinal direction of the bridge. This ensures the connection stability of the end beam 4 and the secondary end beam 5. The height difference between the end beam and the secondary end beam section gradually decreases as the middle span continues to be erected. This allows adaptive adjustment. The tension screw 11 cooperates with the locking nut 12 to make the locking nut 12 abut against the side of the restraining device 2 away from the secondary end beam 5. This can not only ensure the connection stability of the end beam 4 and the secondary end beam 5, but also allow adaptive adjustment when the height difference between the end beam and the secondary end beam section gradually decreases as the middle span continues to be erected. A pulling force is provided to bring the end beam 4 and the secondary end beam 5 closer to each other, which plays a locking role in the longitudinal direction of the bridge. At the same time, the locking nut 12 and the tension screw 11 slide along the slideway as the height of the secondary end beam 5 changes. By setting a limiting mechanism 3, a load is provided to be pressed on the top of the secondary end beam 5 to prevent the secondary end beam 5 from overturning due to the shift of the center of gravity after being connected to the sling. By setting a plurality of pads 33 with different thicknesses, they can be adapted according to the distance between the above-mentioned holding piece 32 and the top of the above-mentioned secondary end beam 5 and can be padded between the above-mentioned holding piece 32 and the top of the above-mentioned secondary end beam 5, which is convenient for obtaining materials and saves costs.

[0065] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0066] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0067] The above description 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. An adaptively adjustable temporary locking device for steel box beams, characterized in that: include: At least one locking member (1), one end of which is used for fixed connection with the top of the secondary end beam (5), and the other end of which is used for extending in the direction of the end beam (4); At least two restraining devices (2) are arranged at intervals on the top of the end beam (4), and the two restraining devices (2) have a set height in the vertical direction to form a slideway for the other end of the locking member (1) to slide in the vertical direction, and the relative positions of the locking member (1) and the restraining device (2) in the longitudinal bridge direction are fixed.

2. The adaptively adjustable temporary locking device for steel box beams according to claim 1, characterized in that: The locking member (1) comprises: A tensioning screw rod (11), one end of which is used for fixed connection with the top of the secondary end beam (5), and the other end of which passes through the slideway; A locking nut (12) is threadably matched with the other end of the tensioning screw rod (11) and abuts against a side of the restraining device (2) away from the secondary end beam (5).

3. The adaptively adjustable temporary locking device for steel box beams according to claim 1, characterized in that: It also includes a limiting mechanism (3), which is used to be fixedly arranged on the top of the end beam (4) and used to be pressed on the top of the secondary end beam (5).

4. The adaptively adjustable temporary locking device for steel box beams according to claim 3, characterized in that: The limiting mechanism (3) comprises: A support member (31) is used to be vertically erected on the top of the end beam (4); A holding member (32), one end of which is connected to the supporting member (31), and the other end of which is used to extend toward the secondary end beam (5); A cushion block assembly is cushioned between the holding member (32) and the top of the secondary end beam (5).

5. The adaptively adjustable temporary locking device for steel box beams according to claim 4, characterized in that: The limiting mechanism (3) further comprises a limiting diagonal brace (34) and a holding diagonal brace (35); one end of the limiting diagonal brace (34) is connected to the support member (31), and the other end is used to be connected to the top of the end beam (4); one end of the holding diagonal brace (35) is connected to the support member (31), and the other end is connected to the holding member (32).

6. The adaptively adjustable temporary locking device for steel box beams according to claim 4, characterized in that: The pad block assembly comprises a plurality of pad blocks (33) of different thicknesses, wherein the pad blocks (33) are adapted according to the distance between the holding member (32) and the top of the secondary end beam (5) and are cushioned between the holding member (32) and the top of the secondary end beam (5).

7. The adaptively adjustable temporary locking device for steel box beams according to claim 3, characterized in that: It also comprises a connecting mechanism (6) for connecting the limiting mechanism (3) with all the restraining devices (2).

8. The adaptively adjustable temporary locking device for steel box beams according to claim 1, characterized in that: A connecting brace (21) is also provided between the restraining device (2) and the top of the end beam (4), one end of which is connected to the restraining device (2) and the other end of which is used to connect to the top of the end beam (4).

9. The adaptively adjustable temporary locking device for steel box beams according to claim 6, characterized in that: Two adjacent restraining devices (2) are connected in series via a shoulder strap (7) to fix the relative positions of the two adjacent restraining devices (2).

10. The adaptively adjustable temporary locking device for steel box beams according to claim 3, characterized in that: The limiting mechanisms (3) are provided in two groups, which are respectively arranged on both sides of the transverse bridge direction of all the restraining devices (2).

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