Temporary locking and fine tuning system for large-span steel truss arch closure gap
By using chord locking and longitudinal and transverse fine-tuning devices, the problem of high-precision adjustment of the closure joint of a long-span steel truss arch bridge was solved, achieving efficient and precise adjustment of the closure joint and improving construction efficiency and accuracy.
Patent Information
- Application Number
- CN202423267445.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-27
AI Technical Summary
During the closure of a long-span steel truss arch bridge, existing technologies struggle to achieve high-precision adjustment of the closure joint, resulting in the upper and lower chords and diagonal members of the closure joint not meeting connection requirements, insignificant adjustment of longitudinal and transverse spacing, low construction efficiency, and long construction period.
The device employs a chord locking mechanism and longitudinal, lateral, and vertical fine-tuning devices, including locking components, jacks, steel strands, reaction components, and steel wire ropes. By precisely adjusting the longitudinal and lateral height differences of the closing chords, temporary locking and fine-tuning are achieved.
It improved the efficiency and precision of the closure joint adjustment, simplified the operation process, and enhanced construction efficiency and precision.
Smart Images
Figure CN223675164U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of closure construction of large-span steel truss arch bridges, and particularly relates to a temporary locking and fine adjustment system for a closure opening of a large-span steel truss arch. BACKGROUND
[0002] The steel truss arch is the main load-bearing structure of a large-span steel truss arch bridge. The most commonly used steel truss arch is a planar truss arch frame composed of upper chord bars, lower chord bars and diagonal bars, and most structural forms adopt a lattice type.
[0003] At present, in the installation process of a closure opening of a large-span steel truss arch, when the linear shape of the steel truss beam is fine-adjusted, the spacing of the closure opening is generally adjusted by using a method of pressing a weight or manually adjusting. In the actual closure process, the linear shape of the butt-jointed closure chord bar in the steel truss arch cannot be accurately adjusted by using the above conventional adjustment method, and therefore the following actual problems often occur before the closure of the closure opening of the steel truss arch: first, the upper chord, the lower chord and the diagonal bar of the closure opening section do not meet the actual connection requirements of the closure chord bar; second, the adjustment effect of the longitudinal and transverse spacing of the closure opening is not obvious, or the adjustment of the spacing of the closure opening is difficult to achieve high accuracy; third, the construction efficiency is low, and the construction period is long. SUMMARY
[0004] The embodiment of the present application provides a temporary locking and fine adjustment system for a closure opening of a large-span steel truss arch, which is simple to operate and has good use effect, and can greatly improve the adjustment efficiency and accuracy of the closure opening.
[0005] The embodiment of the present application provides a temporary locking and fine adjustment system for a closure opening of a large-span steel truss arch, which comprises:
[0006] The chord bar locking device comprises a plurality of locking assemblies, each of the locking assemblies comprises two connecting plates respectively used for being mounted on the erected chord bar and the closure chord bar, a splicing plate and a bolt, and the two connecting plates are connected to two ends of the splicing plate by the bolt.
[0007] The longitudinal fine adjustment device comprises a first jacking mechanism and two counterforce assemblies respectively used for being mounted on the erected chord bar and the closure chord bar, and the first jacking mechanism is connected to the two counterforce assemblies.
[0008] In some embodiments, the first jacking mechanism comprises a jack and a steel strand, one end of the steel strand is connected to one of the counterforce assemblies, the other end of the steel strand passes through the other counterforce assembly and is connected to the jack, and the counterforce assembly and the jack abut.
[0009] In some embodiments, the counterforce assembly comprises a counterforce beam and a plurality of first counterforce seats used for being mounted on the erected chord bar or the closure chord bar, the first counterforce seats are arranged along the transverse bridge direction, and are fixedly connected to the counterforce beam.
[0010] In some embodiments, the system further comprises a lateral fine adjustment device, the lateral fine adjustment device comprising a second jacking mechanism and a second counter-force seat, the second counter-force seat being located on a jacking path of the second jacking mechanism, one of the second jacking mechanism and the second counter-force seat being configured to be installed in the in-box of the erected chord, and the other being configured to be installed in the in-box of the closing-in chord.
[0011] In some embodiments, the second jacking mechanism is a screw jack.
[0012] In some embodiments, the system further comprises a lateral fine adjustment device, the lateral fine adjustment device comprising a first steel wire rope and a first chain, the first steel wire rope and the first chain being connected, one of the first steel wire rope and the first chain being configured to be installed in the in-box of the erected chord, and the other being configured to be installed in the in-box of the closing-in chord.
[0013] In some embodiments, the system further comprises a vertical fine adjustment device for adjusting the height difference of the closing-in chord.
[0014] In some embodiments, the vertical fine adjustment device comprises a third jacking mechanism and a third counter-force seat, the third counter-force seat being located on a jacking path of the third jacking mechanism, one of the third jacking mechanism and the third counter-force seat being configured to be installed in the in-box of the erected chord, and the other being configured to be installed in the in-box of the closing-in chord.
[0015] In some embodiments, the third jacking mechanism is a screw jack.
[0016] In some embodiments, the vertical fine adjustment device comprises a second steel wire rope and a second chain, the second steel wire rope and the second chain being connected, one of the second steel wire rope and the second chain being configured to be installed on a chord locking device of a closing-in chord, and the closing-in chord being a closing-in lower chord, and the other being configured to be installed on a chord locking device of another closing-in chord, and the closing-in chord being a closing-in upper chord.
[0017] The technical scheme provided by the application has the beneficial effects of:
[0018] The utility model discloses simple structure, reasonable in design, processing and simple and easy to operate, and the use effect is good, can improve the large -span steel truss arch closing -in mouth adjustment efficiency and adjustment precision greatly. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating labor.
[0020] Figure 1 The large-span steel truss arch closure mouth temporary locking and fine adjustment system arrangement provided by the embodiment of the application;
[0021] Figure 2 The longitudinal fine adjustment device arrangement provided by the embodiment of the application;
[0022] Figure 3 The transverse fine adjustment device arrangement provided by the embodiment of the application;
[0023] Figure 4 The transverse fine adjustment device arrangement provided by another embodiment of the application;
[0024] Figure 5 The vertical fine adjustment device arrangement provided by the embodiment of the application.
[0025] In the figure: 1, locking assembly; 10, connecting plate; 11, splicing plate; 2, erected chord; 3, closure chord; 4, first pushing mechanism; 40, jack; 41, steel strand; 5, counterforce assembly; 50, counterforce beam; 51, counterforce seat; 6, transverse fine adjustment device; 60, second pushing mechanism; 61, second counterforce seat; 62, first steel wire rope; 63, first chain; 7, vertical fine adjustment device; 70, third pushing mechanism; 71, third counterforce seat; 72, second steel wire rope; 73, second chain. DETAILED DESCRIPTION
[0026] To make the purpose, technical solutions and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are some but not all of the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the application.
[0027] Referring to Figure 1 As shown in the figure, the embodiment of the application provides a large-span steel truss arch closure mouth temporary locking and fine adjustment system, which comprises a chord locking device and a longitudinal fine adjustment device. The chord locking device comprises a plurality of locking assemblies 1, and each locking assembly 1 comprises two connecting plates 10 and a splicing plate 11 for being mounted on an erected chord 2 and a closure chord 3 respectively, and a bolt, wherein the closure chord 3 can be a closure upper chord or a closure lower chord, just as shown in the figure. Figure 1A locking assembly 1 is mounted on the closing upper chord and the closing lower chord, and a bolt can be used friction bolt, two connecting plates 10 are connected to the two ends of the spliced plate 11 through the bolt; the longitudinal fine adjustment device comprises a first pushing mechanism 4 and two counterforce assemblies 5 respectively used for being mounted on the erected chord 2 and the closing chord 3, and the first pushing mechanism 4 is connected with the two counterforce assemblies 5.
[0028] There are erected chords on both sides of the closure gap, the closing chord 3 is matched with the erected chord on one side of the closure gap first, then the ring gap welding is carried out in advance, and then the system provided in the embodiment is installed between the closing chord 3 and the erected chord 2 on the other side, specifically: the connecting plates 10 are mounted on the closing chord 3 and the erected chord 2 respectively, then the spliced plate 11 is mounted between the two connecting plates 10 by using the bolt, and temporary locking is realized; the two counterforce assemblies 5 are mounted on the erected chord 2 and the closing chord 3 respectively, and the first pushing mechanism 4 is assembled, the longitudinal distance is adjusted by pushing along the longitudinal direction through the first pushing mechanism 4, and compared with the temporary adjustment of the weight or manual adjustment, the system is easy to operate and has good use effect, and the adjustment efficiency and the adjustment accuracy of the closure gap can be greatly improved.
[0029] In order to improve the temporary locking effect, the locking assembly 1 can be provided with multiple, for example, four, which are located on the top plate, the bottom plate and the two web plates of the chord.
[0030] In order to realize the pushing and thus realize the accurate adjustment of the longitudinal distance, the embodiment of the application further provides the specific structure of the first pushing mechanism 4, which is shown in Figure 2 The first pushing mechanism 4 comprises a jack 40 and a steel strand 41, the jack 40 is a through jack, one end of the steel strand 41 is connected to one counterforce assembly 5, the other end of the steel strand 41 passes through the other counterforce assembly 5 and is connected to the jack 40, and the counterforce assembly 5 abuts against the jack 40. The steel strand 41 is pulled by the jack 40, so that the adjustment of the longitudinal distance is realized.
[0031] The number of the first pushing mechanism 4 can be determined according to the actual pushing requirement, for example, two first pushing mechanisms 4 are shown in Figure 2
[0032] In order to realize the pushing and thus realize the accurate adjustment of the longitudinal distance, the embodiment of the application further provides the specific structure of the first pushing mechanism 4, which is shown in Figure 2 The counterforce assembly 5 comprises a counterforce beam 50 and a plurality of first counterforce seats 51 used for being mounted on the erected chord 2 or the closing chord 3, the first counterforce seats 51 are arranged along the transverse bridge direction and are fixedly connected with the counterforce beam 50.
[0033] Further, in order to realize the accurate adjustment of the transverse distance, the system further comprises a transverse fine adjustment device 6, and the transverse fine adjustment device 6 has multiple types, for example,Figure 3 As shown, as an example, the lateral fine adjustment device 6 comprises a second jacking mechanism 60 and a second counter-force seat 61, the second counter-force seat 61 is located on the jacking path of the second jacking mechanism 60, wherein the jacking path can be along the lateral direction or at an acute angle with the lateral direction, one of the second jacking mechanism 60 and the second counter-force seat 61 is used to be installed in the inner box of the erected chord 2, and the other is used to be installed in the inner box of the closure chord 3. In order to better realize jacking, see Figure 3 As shown, the second jacking mechanism 60 is installed in the inner box of the erected chord 2, and the second counter-force seat 61 is installed in the closure chord 3.
[0034] Among them, the second jacking mechanism 60 can adopt a screw jack.
[0035] For example, see Figure 4 As shown, as another example, the system further comprises a lateral fine adjustment device 6, the lateral fine adjustment device 6 comprises a first steel wire rope 62 and a first chain block 63, the first steel wire rope 62 and the first chain block 63 are connected, and one of the first steel wire rope 62 and the first chain block 63 is used to be installed in the inner box of the erected chord 2, and the other is used to be installed in the inner box of the closure chord 3.
[0036] Further, in order to realize the accurate adjustment of the height difference, the system further comprises a vertical fine adjustment device 7 for adjusting the height difference of the closure chord 3, and the vertical fine adjustment device 7 has many kinds, such as, see Figure 5 As shown, as an example, the vertical fine adjustment device 7 comprises a third jacking mechanism 70 and a third counter-force seat 71, the third counter-force seat 71 is located on the jacking path of the third jacking mechanism 70, and one of the third jacking mechanism 70 and the third counter-force seat 71 is used to be installed in the inner box of the erected chord 2, and the other is used to be installed in the inner box of the closure chord 3.
[0037] In order to better realize jacking, see Figure 5 As shown, the third counter-force seat 71 is installed in the inner box of the erected chord 2, and the third jacking mechanism 70 is installed in the closure chord 3.
[0038] Among them, the third jacking mechanism 70 adopts a screw jack.
[0039] For example, see Figure 1 As shown, as another example, the vertical fine adjustment device 7 comprises a second steel wire rope 72 and a second chain block 73, the second steel wire rope 72 and the second chain block 73 are connected, and one of the second steel wire rope 72 and the second chain block 73 is used to be installed on the chord locking device of a closure chord 3, and the closure chord 3 is a closure lower chord, and the other is used to be installed on the chord locking device of another closure chord 3, and the closure chord 3 is a closure upper chord.
[0040] For the two examples of the vertical fine adjustment device 7 described above, no matter whether the closure chord 3 is a closure lower chord or a closure upper chord, the structure form of the third pushing mechanism 70 and the third counter-force seat 71 can be adopted, and when the height difference of the closure lower chord is adjusted, the structure form of the second steel wire rope 72 and the second chain block 73 needs to be adopted for the vertical fine adjustment device 7.
[0041] It should be noted that since the steel truss arch adopts the planar truss arch frame composed of upper chords, lower chords and diagonal rods, and is divided into upstream and downstream, the closure chord of the closure gap includes one upper chord and one lower chord in the upstream, and one upper chord and one lower chord in the downstream.
[0042] Based on this, the large-span steel truss arch closure gap temporary locking and fine adjustment system provided by the present application can include one chord locking device and corresponding one longitudinal fine adjustment device, one transverse fine adjustment device and one vertical fine adjustment device, at this time, the system can be constructed chord by chord.
[0043] In order to improve the construction efficiency, the large-span steel truss arch closure gap temporary locking and fine adjustment system provided by the present application can include two chord locking devices and corresponding two longitudinal fine adjustment devices, two transverse fine adjustment devices and two vertical fine adjustment devices, at this time, the upstream upper chord and the upstream lower chord can be constructed first, and then the downstream upper chord and the downstream lower chord can be constructed, or the downstream upper chord and the downstream lower chord can be constructed first, and then the upstream upper chord and the upstream lower chord can be constructed.
[0044] In order to further improve the construction efficiency, the large-span steel truss arch closure gap temporary locking and fine adjustment system provided by the present application can include four chord locking devices and corresponding four longitudinal fine adjustment devices, four transverse fine adjustment devices and four vertical fine adjustment devices, at this time, the upstream upper chord and the upstream lower chord, and the downstream upper chord and the downstream lower chord can be constructed simultaneously.
[0045] In the description of the present application, it should be noted that the terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0046] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.
[0047] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.
Claims
1. A large-span steel truss arch splicing temporary locking and fine-tuning system, characterized in that, It comprises: a chord locking device comprising several locking assemblies (1), each locking assembly (1) comprising two connecting plates (10) for mounting on the erected chord (2) and the closure chord (3) respectively, a splice plate (11), and bolts, the two connecting plates (10) connecting the two ends of the splice plate (11) by bolts respectively; a longitudinal fine adjustment device comprising a first jacking mechanism (4) and two counterforce assemblies (5) for mounting on the erected chord (2) and the closure chord (3) respectively, the first jacking mechanism (4) being connected to the two counterforce assemblies (5).
2. The temporary locking and fine adjustment system for the closure gap of a large-span steel truss arch according to claim 1, characterized in that: the first jacking mechanism (4) comprises a jack (40) and a steel strand (41), one end of the steel strand (41) being connected to one of the counterforce assemblies (5), the other end of the steel strand (41) passing through the other counterforce assembly (5) and being connected to the jack (40), and the counterforce assembly (5) abutting against the jack (40).
3. The temporary locking and fine adjustment system for the closure gap of a large-span steel truss arch according to claim 1, characterized in that: the counterforce assembly (5) comprises a counterforce beam (50) and several first counterforce seats (51) for mounting on the erected chord (2) or the closure chord (3), the first counterforce seats (51) being arranged along the transverse bridge direction and being fixedly connected to the counterforce beam (50).
4. The temporary locking and fine adjustment system for the closure gap of a large-span steel truss arch according to claim 1, characterized in that: the system further comprises a transverse fine adjustment device (6), the transverse fine adjustment device (6) comprising a second jacking mechanism (60) and a second counterforce seat (61), the second counterforce seat (61) being located on the jacking path of the second jacking mechanism (60), one of the second jacking mechanism (60) and the second counterforce seat (61) being used for mounting in the inner box of the erected chord (2), and the other being used for mounting in the inner box of the closure chord (3).
5. The system for temporary locking and fine tuning of the closure gap of long-span steel truss arches as claimed in claim 4 wherein: the second jacking mechanism (60) adopts a screw jack.
6. The temporary locking and fine adjustment system for the closure gap of a large-span steel truss arch according to claim 1, characterized in that: the system further comprises a transverse fine adjustment device (6), the transverse fine adjustment device (6) comprising a first steel wire rope (62) and a first chain (63), the first steel wire rope (62) and the first chain (63) being connected, one of the first steel wire rope (62) and the first chain (63) being used for mounting in the inner box of the erected chord (2), and the other being used for mounting in the inner box of the closure chord (3).
7. The temporary locking and fine adjustment system for the closure gap of a large-span steel truss arch according to claim 1, characterized in that: the system further comprises a vertical fine adjustment device (7) for adjusting the height difference of the closure chord (3).
8. The temporary locking and fine adjustment system for the closure gap of a large-span steel truss arch according to claim 7, characterized in that: The vertical fine adjustment device (7) comprises a third jacking mechanism (70) and a third counter-force seat (71), the third counter-force seat (71) is located on the jacking path of the third jacking mechanism (70), one of the third jacking mechanism (70) and the third counter-force seat (71) is used to be installed in the box in the erected chord (2), and the other is used to be installed in the box in the closure chord (3).
9. The large-span steel truss arch splicing temporary locking and fine-tuning system of claim 8, wherein: The third jacking mechanism (70) adopts a screw jack.
10. The temporary locking and fine adjustment system for closure gap of large-span steel truss arches according to claim 7, characterized in that: The vertical fine adjustment device (7) comprises a second steel wire rope (72) and a second chain block (73), the second steel wire rope (72) and the second chain block (73) are connected, one of the second steel wire rope (72) and the second chain block (73) is used to be installed on the chord locking device of a closure chord (3), and the closure chord (3) is a lower closure chord, and the other is used to be installed on the chord locking device of another closure chord (3), and the closure chord (3) is an upper closure chord.