CN223675130U - Irregularly shaped multi-main-beam steel-concrete composite beam with counterweight adjustment - Google Patents
Irregularly shaped multi-main-beam steel-concrete composite beam with counterweight adjustmentInfo
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- CN223675130U CN223675130U CN202520245946.8U CN202520245946U CN223675130U CN 223675130 U CN223675130 U CN 223675130U CN 202520245946 U CN202520245946 U CN 202520245946U CN 223675130 U CN223675130 U CN 223675130U
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Abstract
本实用新型公开了一种配重调差的异形多主梁钢混组合梁，包括：变截面梁，架设于梁柱上，变截面梁两端固定安装于梁柱上，变截面梁中支点处放置于梁柱上，变截面梁包括：多个纵向设置的主梁以及多个横向设置的横梁，横梁的长度沿第一方向依次减短；顶升装置，设置于中支点处的梁柱与变截面梁之间，顶升装置用于对变截面梁进行顶升；桥面板，设置于变截面梁的正弯矩区；多个配重块，设置于桥面板上，配重块用于优化桥面板的应力分布。本申请使得整个桥面板的应力分配均匀可靠。
This utility model discloses a non-standard multi-main-beam steel-concrete composite beam with counterweight adjustment, comprising: a variable cross-section beam, erected on beam-columns, with both ends of the variable cross-section beam fixedly installed on the beam-columns, and the mid-support point of the variable cross-section beam placed on the beam-columns; the variable cross-section beam includes: multiple longitudinally arranged main beams and multiple transversely arranged crossbeams, the length of which decreases sequentially along a first direction; a lifting device, disposed between the beam-columns at the mid-support point and the variable cross-section beam, used to lift the variable cross-section beam; a bridge deck, disposed in the positive bending moment zone of the variable cross-section beam; and multiple counterweights, disposed on the bridge deck, used to optimize the stress distribution of the bridge deck. This application ensures a uniform and reliable stress distribution throughout the bridge deck.
Description
Technical Field
The utility model relates to the technical field of bridge construction equipment, in particular to a special-shaped multi-girder steel-concrete composite girder with balance weight adjustment.
Background
With the continuous development of modern bridge engineering construction, the performance requirements on bridge structures are increasingly improved. The steel-concrete composite beam is used as a common bridge structural form and is widely applied to large-span bridges. However, conventional steel-concrete composite beam structures increasingly expose some limitations in the face of complex stress conditions and specific design requirements.
Under the requirements of special terrains or traffic layout, the bridge needs to adopt a structural form of a special-shaped multi-girder. Compared with the common steel beam structure, the structure has more complex stress distribution. Under the action of various loads such as the self weight of the beam body, the load of the vehicle, the environmental factors and the like, the special-shaped multi-girder steel-concrete composite beam is easy to generate stress concentration phenomenon, especially in a positive bending moment area. Stress concentration can cause the bridge deck to crack, deform or even destroy prematurely, seriously affect the durability and safety of the bridge, and increase the later maintenance cost and difficulty.
To improve this situation, the prior art has tried various methods. For example, in the aspect of structural design, the stress distribution is adjusted by optimizing the sectional shapes and the sizes of the main beams and the cross beams, but the method is often limited by various aspects such as design specifications, construction process, material performance and the like, and the requirement of stress homogenization is difficult to completely meet. In the construction process, there are attempts to improve the stress condition by adjusting the concrete pouring sequence and the vibration mode, but the effect is not ideal.
Disclosure of utility model
The utility model aims to at least solve the technical problems in the prior art and provide a special-shaped multi-girder steel-concrete composite beam with a balance weight difference adjustment function, which can improve stress distribution.
The utility model provides a special-shaped multi-girder steel-concrete composite girder with balance weight adjustment, which comprises the following components:
The variable cross-section beam is erected on a beam column, two ends of the variable cross-section beam are fixedly arranged on the beam column, a fulcrum in the variable cross-section beam is arranged on the beam column, the variable cross-section beam comprises a plurality of longitudinally arranged main beams and a plurality of transversely arranged cross beams, and the lengths of the cross beams are sequentially shortened along a first direction;
The jacking device is arranged between the beam column at the middle pivot and the variable-section beam and is used for jacking the variable-section beam;
The bridge deck is arranged in the positive bending moment area of the variable cross-section beam;
The balancing weights are arranged on the bridge deck plate and are used for optimizing the stress distribution of the bridge deck plate.
The special-shaped multi-girder steel-concrete composite girder with the weight difference adjustment has the beneficial effects that:
The application relates to a special-shaped multi-girder steel-concrete composite girder with weight adjustment, wherein a jacking device is arranged between a girder column at a middle pivot and a variable-section girder and is cooperated with a balancing weight. The jacking device can accurately adjust the elevation of the beam body in the construction stage or the operation and maintenance process, and can effectively improve the stress balance state of the structure by combining with the optimization of the balancing weight on the stress distribution, and enhance the capability of the structure for resisting the destabilization damage such as overturning, sliding and the like. Particularly for bridges with large span and special-shaped structures, the improvement of the stability is important to ensure the safety of the bridge in complex environments and long-term use. Through set up a plurality of balancing weights on the decking, can carry out the stress adjustment with pertinence according to the actual stress condition of dysmorphism many girder steel-concrete composite beam under different operating modes (like different vehicle load distribution, dead weight distribution etc.). The position and the weight of the balancing weight can be flexibly configured, so that the stress concentration phenomenon in the positive bending moment area can be effectively relieved, and the stress distribution of the bridge deck plate is more uniform and reasonable. After the construction is completed, the configuration blocks can be taken down, the jacking device can be lowered to the designed elevation, and the bridge deck plate in the hogging moment area is poured, so that the stress distribution of the whole bridge deck plate is uniform and reliable.
According to the utility model, the balancing weight is a bar block and is arranged right above the main beam.
According to the present utility model, the jacking device includes:
the capping beam is arranged on the beam column;
the cushion block is arranged on the cover beam and used for dispersing pressure on the cover beam;
The jack is arranged on the cushion block and is used for jacking the variable-section beam;
And the distribution beam is arranged between the jack and the variable cross-section beam and is used for dispersing the pressure on the variable cross-section beam.
According to the utility model, the deck slab is a cement concrete deck slab.
According to the utility model, the cross beams at the two ends of the variable-section beam are end reinforcing beams.
According to the utility model, the middle supporting point of the variable-section beam is provided with a middle reinforcing beam.
According to the utility model, the jacking height is in the range of 20cm to 40cm.
According to the utility model, the configuration load of the balancing weight is 100kg/m-200kg/m.
According to the utility model, the number of the main beams is 4-8.
Drawings
The utility model is further described below with reference to the drawings and examples;
FIG. 1 is a schematic view of a multi-girder steel-concrete composite beam with special-shaped balance weight adjustment according to an embodiment of the utility model;
FIG. 2 is a diagram of the structure of a steel beam of the special-shaped multi-girder steel-concrete composite girder with weight adjustment according to the embodiment of the utility model;
FIG. 3 is a diagram of a jacking device of a special-shaped multi-girder steel-concrete composite girder with weight adjustment according to the embodiment of the utility model;
FIG. 4 is a deck slab effect diagram of a multi-girder steel-concrete composite beam with special-shaped balance weight adjustment according to an embodiment of the utility model;
Fig. 5 is a diagram showing the effect of the balance weight of the special-shaped multi-girder steel-concrete composite girder with the balance weight adjustment according to the embodiment of the utility model.
Reference numerals illustrate the variable cross-section beam 101, main beam 102, cross beam 103, jacking device 104, bridge deck 105, counterweight 106, capping beam 107, spacer 108, jack 109, distribution beam 110, end reinforcing beam 111, middle reinforcing beam 112.
Detailed Description
Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 5, fig. 1 is a schematic view of a multi-girder steel-concrete composite girder with special-shaped weight adjustment according to an embodiment of the present utility model, fig. 2 is a steel girder structure diagram of a multi-girder steel-concrete composite girder with special-shaped weight adjustment according to an embodiment of the present utility model, fig. 3 is a lifting device diagram of a multi-girder steel-concrete composite girder with special-shaped weight adjustment according to an embodiment of the present utility model, fig. 4 is a bridge deck diagram of a multi-girder steel-concrete composite girder with special-shaped weight adjustment according to an embodiment of the present utility model, and fig. 5 is a weight diagram of a multi-girder steel-concrete composite girder with special-shaped weight adjustment according to an embodiment of the present utility model.
In an embodiment, the special-shaped multi-girder 102 reinforced concrete composite girder with the weight adjustment comprises a variable cross-section girder 101, a jacking device 104, a bridge deck 105 and a plurality of balancing weights 106, wherein the variable cross-section girder 101 is erected on a girder column, two ends of the variable cross-section girder 101 are fixedly installed on the girder column, a middle pivot point of the variable cross-section girder 101 is placed on the girder column, the variable cross-section girder 101 comprises a plurality of longitudinally arranged girders 102 and a plurality of transversely arranged cross beams 103, the length of the cross beams 103 is sequentially shortened along a first direction, namely a bridge deck narrowing direction, the jacking device 104 is arranged between the girder column at the middle pivot point and the variable cross-section girder 101, the jacking device 104 is used for jacking the variable cross-section girder 101, the bridge deck 105 is arranged in a positive bending moment area of the variable cross-section girder 101, the balancing weights 106 are arranged on the bridge deck 105, and the balancing weights 106 are used for optimizing stress distribution of the bridge deck 105.
By arranging the plurality of balancing weights 106 on the bridge deck 105, the stress can be adjusted in a targeted manner according to the actual stress conditions of the special-shaped multi-girder 102 steel-concrete composite girder under different working conditions (such as different vehicle load distribution, dead weight distribution and the like). Because the position and the weight of the balancing weight 106 can be flexibly configured, the stress concentration phenomenon in the positive bending moment area can be effectively relieved, and the stress distribution of the bridge deck 105 is more uniform and reasonable.
The design that the length of the special-shaped multi-girder 102 structure and the length of the cross beam 103 are sequentially shortened along the first direction makes the girder body stressed complex and changeable. The balancing weight 106 is matched with the special structure, so that the cooperative stress relation between the main beams 102 and the cross beams 103 can be fully considered, and the stress system of the whole variable cross-section beam 101 can be optimized. The mechanical properties of each structural component can be better exerted under the static load or dynamic load effect, the stress singular point caused by irregular structure is reduced, and the stability and reliability of the whole reinforced concrete composite beam structure are improved.
The jacking device 104 is arranged between the beam column at the middle pivot point and the variable cross-section beam 101 and cooperates with the balancing weight 106. The jacking device 104 can accurately adjust the elevation of the beam body in the construction stage or the operation and maintenance process, and the stress balance state of the structure can be effectively improved by combining the optimization of the counterweight 106 on the stress distribution, so that the capability of the structure for resisting the destabilization damage such as overturning, sliding and the like is enhanced. Particularly for bridges with large span and special-shaped structures, the improvement of the stability is important to ensure the safety of the bridge in complex environments and long-term use.
The counterweight 106 is disposed on the bridge deck 105, and the construction process is relatively simple compared with the complex reinforcement or reconstruction measures for the inside of the beam structure. In the bridge construction process, the installation position and the weight of the balancing weight 106 can be conveniently adjusted according to the actual structural stress test result, stress deviation in the construction process can be timely corrected, the whole construction progress and the installation procedures of other structural components are not affected, and the construction difficulty and the construction cost are reduced.
In an embodiment, the special-shaped multi-girder 102 reinforced concrete composite girder with the weight adjustment comprises a variable cross-section girder 101, a bridge deck 105 and a plurality of balancing weights 106, wherein the variable cross-section girder 101 is erected on a girder column, two ends of the variable cross-section girder 101 are fixedly installed on the girder column, a fulcrum of the variable cross-section girder 101 is placed on the girder column, the variable cross-section girder 101 comprises a plurality of longitudinally arranged girders 102 and a plurality of transversely arranged cross beams 103, the lengths of the cross beams 103 are sequentially shortened along a first direction, a jacking device 104 is arranged between the girder column at a middle fulcrum and the variable cross-section girder 101, the jacking device 104 is used for jacking the variable cross-section girder 101, the bridge deck 105 is arranged in a positive bending moment area of the variable cross-section girder 101, the balancing weights 106 are arranged on the bridge deck 105, and the balancing weights 106 are used for optimizing stress distribution of the bridge deck 105. The weight 106 is a bar-shaped block and is placed directly above the main beam 102.
The number of the jacking devices 104 is consistent with that of the main beams 102, one cross beam 103 is arranged at the middle pivot point, one jacking device 104 is correspondingly arranged at the connecting positions of the cross beams 103 at the middle pivot point and all the main beams 102, the cross beams 103 at the middle pivot point are jacked to the same height through the jacking devices 104, but the variable cross beams 101 are uneven in stress distribution, the counter weights 106 are needed to be used for balancing the stresses of the positive bending moment areas of the bridge deck 105 after the pouring is completed, then the concrete bridge deck 105 of the negative bending moment areas is poured, after the concrete bridge deck 105 of the negative bending moment areas reaches the design strength, the jacking devices 104 are lowered to the design elevation, and the counter weights 106 are removed, so that the stress distribution of the whole bridge deck 105 is even, the design strength of a better bridge deck structure is obtained, and the service life is prolonged.
In an embodiment, the special-shaped multi-girder 102 reinforced concrete composite girder with the weight adjustment comprises a variable cross-section girder 101, a bridge deck 105 and a plurality of balancing weights 106, wherein the variable cross-section girder 101 is erected on a girder column, two ends of the variable cross-section girder 101 are fixedly installed on the girder column, a fulcrum of the variable cross-section girder 101 is placed on the girder column, the variable cross-section girder 101 comprises a plurality of longitudinally arranged girders 102 and a plurality of transversely arranged cross beams 103, the lengths of the cross beams 103 are sequentially shortened along a first direction, a jacking device 104 is arranged between the girder column at a middle fulcrum and the variable cross-section girder 101, the jacking device 104 is used for jacking the variable cross-section girder 101, the bridge deck 105 is arranged in a positive bending moment area of the variable cross-section girder 101, the balancing weights 106 are arranged on the bridge deck 105, and the balancing weights 106 are used for optimizing stress distribution of the bridge deck 105.
The jacking device 104 comprises a cover beam 107 arranged on a beam column, a cushion block 108 arranged on the cover beam 107, a jack 109 arranged on the cushion block 108, the jack 109 used for jacking the variable cross-section beam 101, and a distribution beam 110 arranged between the jack 109 and the variable cross-section beam 101, wherein the cushion block 108 is used for dispersing the pressure on the cover beam 107, and the distribution beam 110 is used for dispersing the pressure on the variable cross-section beam 101.
The capping beam 107 is provided on the beam column, and serves as an important foundation support structure for the jacking device 104, and can effectively and uniformly transmit loads from the upper jacking device 104 and the beam body to the beam column. The contact area between the beam column and the jacking device 104 is increased, the local compressive stress is reduced, damage or local deformation of the top of the beam column due to overlarge concentrated load is avoided, and the reliability and stability of vertical force transmission of the whole structural system in the jacking operation process are ensured. Providing a stable and horizontal installation base for subsequent jacking components such as the cushion block 108, the jack 109 and the like. The relatively flat and regular surface is beneficial to accurately installing and positioning other components, is convenient to measure and adjust in the construction process, ensures the cooperative work precision among the components of the jacking device 104, and accordingly realizes the accurate control of the jacking operation of the variable cross-section beam 101.
The spacer 108 is placed on the capping beam 107, and its main function is to further disperse the concentrated pressure transmitted from the jack 109. Since the pressure generated by the jack 109 during the lifting process is relatively large and concentrated, if it directly acts on the capping beam 107, it may result in insufficient local bearing capacity of the capping beam 107. The cushion block 108 reduces the local compressive stress peak value born by the capping beam 107 by increasing the contact area with the capping beam 107, effectively protects the capping beam 107 structure, prevents the problems of cracks, damages and the like caused by overlarge local compression, prolongs the service life of the capping beam 107 and ensures the safe performance of jacking operation.
In the jacking process, in addition to bearing vertical pressure, some impact force or uneven force may be generated due to factors such as small deformation of the beam body, vibration or instability of the operation of the jack 109. The cushion block 108 can play a certain role in buffering, absorb and alleviate the additional acting forces, reduce damage to equipment such as the capping beam 107 and the jack 109, improve reliability and durability of the whole jacking system, and reduce equipment maintenance cost and construction risk caused by equipment faults.
The jack 109 serves as a core power component for lifting and can provide a precisely controllable lifting force. In the jacking operation of the special-shaped multi-girder 102 steel-concrete composite girder, the jack 109 can accurately output the magnitude and the stroke of the jacking force according to actual demands no matter for adjusting the elevation of the girder body, correcting the irregularity of the girder body caused by construction errors or later structural deformation or for matching with the balancing weight 106 for carrying out the posture adjustment of the girder body during the stress distribution optimization, thereby realizing the fine adjustment of the height of the girder body, meeting the high-precision adjustment requirements of complex structures under different working conditions and ensuring the safety and the service performance of bridge structures.
The jack 109 has a strong adaptability and can play a role in different construction stages and operation and maintenance scenarios. The method can be used for erecting and installing the beam body, assisting in adjusting the position and the elevation of the beam body, ensuring the accurate butt joint of the beam body and other structural components, and can be used for repairing the deformation of the beam body or adjusting the structural stress caused by foundation settlement, structural aging and the like in the operation stage, recovering or improving the stress state of the beam body through timely jacking operation, prolonging the service life of a bridge, reducing the possibility of large-scale reconstruction or replacement caused by structural diseases, and has remarkable economic and social benefits.
The distribution beam 110 is located between the jack 109 and the variable cross-section beam 101 and functions to uniformly distribute the jacking force provided by the jack 109 to the variable cross-section beam 101. Because the variable cross-section beam 101 has a complex structure and special stress characteristics, especially in the case of the special-shaped multi-main beam 102, the stress requirements and the bearing capacities of different positions are different. The distribution beam 110 can reasonably distribute the lifting force to each key part according to the structural form and the stress characteristics of the beam body, so that the local damage or uneven deformation of the beam body caused by the concentrated lifting force is avoided, the whole stress of the beam body in the lifting process is ensured to be uniform and coordinated, and the safe and stable lifting of the beam body is realized.
In the jacking operation process, the uniform distribution of the vertical jacking force is considered, and the local rigidity and deformation characteristics of the beam body are also considered. The distribution beam 110 can effectively avoid local stress concentration points or unreasonable deformation modes on the beam body due to direct action of the jacking force through its own structural design and a contact mode with the beam body. The novel lifting device can adapt to the surface shape and the structural characteristics of the beam body, transfer the lifting force to the beam body in a softer and uniform mode, reduce potential damage to the structure of the beam body, and particularly play a good role in protecting weak or key parts (such as splicing parts of the beam body, prestressed tendon anchoring areas and the like) and ensure the structural integrity and safety of the beam body in the lifting process.
Further, the deck slab 105 is a cement concrete slab.
Further, the cross members 103 at both ends of the variable cross-section beam 101 are end reinforcing beams 111.
The cross beams 103 at the two ends of the variable cross-section beam 101 serve as end reinforcing beams 111, and play a key role in reinforcing the connection parts with the beam columns. When the bridge bears various loads, the end parts are key nodes for force transmission, and the reinforcing beam can effectively increase the rigidity and strength of the connecting points. Since the end portions are regions where stress concentration is more pronounced, the end reinforcing beams 111 help spread the stress at the beam ends to surrounding regions. Through self structural feature, will concentrate load stress dispersion to the more extensive roof beam body region for the stress distribution of roof beam end is more even, reduces the concrete fracture that leads to because of local stress is too big, steel problem such as yielding, prolongs the life of roof beam end structure, reduces cost of maintenance and frequency, ensures the security and the reliability of bridge in long-term use.
Further, a middle reinforcing beam 112 is provided at the middle pivot point of the variable cross-section beam 101. The center point of the variable cross-section beam 101 is subjected to large shear forces and bending moments, and the provision of the center reinforcing beam 112 significantly enhances the load carrying capacity of the center point. The device can effectively resist huge internal force generated by the self weight, the live load and the like of the beam body at the middle pivot point, and prevent the middle pivot point region from being excessively deformed, cracked and even damaged. For example, in a large span bridge, the central reinforcing beam 112 can more reasonably distribute the concentrated load at the middle pivot point to the surrounding beam body structure, ensure the structural integrity of the beam body near the middle pivot point, maintain the normal use function of the bridge, and improve the safety reserve of the bridge.
Further, the jacking height ranges from 20cm to 40cm, and the jacking height can be 20cm, 30cm or 40cm.
Further, the load of the counterweight 106 is 100kg/m-200kg/m, and the load of the counterweight 106 may be 100kg/m, 150kg/m, or 200kg/m.
Further, the number of the main beams 102 is 4-8, and the number of the main beams 102 may be 4, 5, 6, 7 or 8.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (9)
1. The utility model provides a counter weight accent bad dysmorphism many girder steel-concrete composite beam which characterized in that includes:
The variable cross-section beam is erected on a beam column, two ends of the variable cross-section beam are fixedly arranged on the beam column, a fulcrum in the variable cross-section beam is arranged on the beam column, the variable cross-section beam comprises a plurality of longitudinally arranged main beams and a plurality of transversely arranged cross beams, and the lengths of the cross beams are sequentially shortened along a first direction;
The jacking device is arranged between the beam column at the middle pivot and the variable-section beam and is used for jacking the variable-section beam;
The bridge deck is arranged in the positive bending moment area of the variable cross-section beam;
The balancing weights are arranged on the bridge deck plate and are used for optimizing the stress distribution of the bridge deck plate.
2. The multi-girder steel-concrete composite girder with the balance weight adjustment according to claim 1, wherein the balancing weight is a bar block and is arranged right above the girder.
3. The multi-girder steel-concrete composite girder with the balance weight adjustment according to claim 1, wherein the jacking device comprises:
the capping beam is arranged on the beam column;
the cushion block is arranged on the cover beam and used for dispersing pressure on the cover beam;
The jack is arranged on the cushion block and is used for jacking the variable-section beam;
And the distribution beam is arranged between the jack and the variable cross-section beam and is used for dispersing the pressure on the variable cross-section beam.
4. The differential weight type special-shaped multi-girder steel-concrete composite girder according to claim 1, wherein the bridge deck is a cement concrete deck.
5. The multi-girder steel-concrete composite girder with the balance weight adjustment according to claim 1, wherein the cross beams at the two ends of the variable cross-section girder are end reinforcing girders.
6. The multi-girder steel-concrete composite girder with the balance weight adjustment according to claim 1, wherein a middle reinforcing girder is arranged at a middle pivot point of the variable cross-section girder.
7. The weight-adjusted profiled multi-girder steel-concrete composite girder of claim 1, wherein the jacking height ranges from 20cm to 40cm.
8. The multi-girder steel-concrete composite girder with the balance weight adjustment according to claim 1, wherein the configuration load of the balancing weight is 100kg/m-200kg/m.
9. The multi-girder steel-concrete composite girder with the balance weight adjustment according to claim 1, wherein the number of the girders is 4-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520245946.8U CN223675130U (en) | 2025-02-17 | 2025-02-17 | Irregularly shaped multi-main-beam steel-concrete composite beam with counterweight adjustment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520245946.8U CN223675130U (en) | 2025-02-17 | 2025-02-17 | Irregularly shaped multi-main-beam steel-concrete composite beam with counterweight adjustment |
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| CN223675130U true CN223675130U (en) | 2025-12-16 |
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| CN202520245946.8U Active CN223675130U (en) | 2025-02-17 | 2025-02-17 | Irregularly shaped multi-main-beam steel-concrete composite beam with counterweight adjustment |
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| CN (1) | CN223675130U (en) |
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