Movable counterweight system for asymmetric cantilever beam construction

Abstract

The utility model relates to a movable counterweight system for asymmetric cantilever beam construction, which comprises a slideway, a counter-force seat, a balance box, a pushing system and an intelligent control box, the slideway is arranged on the shorter side of a beam body of a cantilever beam, the balance box is arranged on the slideway, the balance box and the slideway are in sliding fit, and the counter-force seat is arranged on the counter-force seat. The counter-force base is arranged on the beam body and located on the rear side of the sliding way, the pushing system is arranged between the balance box and the counter-force base and used for pushing the balance box to enable the balance box to slide along the sliding way, and the intelligent control box is arranged on the beam body. The intelligent control box collects the vertical pressure of the balance box and controls the pushing distance of the pushing system according to the vertical pressure. The utility model has the advantages that: the transverse and longitudinal double balance of the asymmetric suspended pouring beam can be simultaneously met in real time, and the intelligent degree is high; all operations are performed on the bridge, and the device is suitable for small sites under the bridge. And the method has good application significance and popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a movable counterweight system for the construction of asymmetric cantilever beams. Background Art

[0002] Cantilever casting is a common and mature construction technology in the field of bridge engineering, with a history of over a hundred years. However, the traditional method of adding water tanks, sandbags, steel ingots, etc. is still used to cast unbalanced cantilever structures. This requires lifting space under the bridge and cannot move the bridge deck, resulting in low counterweight efficiency and inability to achieve real-time balance.

[0003] With the rise of rail transit, there are various types of rail transit systems in major cities. During the construction process, there is a spatial conflict between the existing projects and the existing construction sites. This has led to the emergence of relatively traditional construction methods, requiring new construction methods suitable for small sites and unconventional unbalanced suspended casting systems. At the same time, with the advent of the intelligent era, construction must also be more intelligent and digitalized to liberate manpower and eliminate human errors.

[0004] Movable counterweight systems are rarely seen in the industry at present. For extremely unbalanced suspended pouring construction, it is imperative to develop a more efficient counterweight system with small operating space under the bridge and the ability to balance in real time. Summary of the Invention

[0005] The purpose of this utility model is to provide a movable counterweight system for the construction of asymmetric cantilever beams in response to the above-mentioned deficiencies in the prior art. By setting a movable, real-time balanced, intelligent balancing box on the shorter side of the cantilever beam, the cantilever beam can be subjected to an effective load at this position, thereby achieving the balance of the asymmetric cantilever beam.

[0006] The purpose of this utility model is achieved by the following technical solutions:

[0007] A movable counterweight system for the construction of asymmetric cantilever beams, characterized in that it includes a slide, a reaction seat, a balance box, a pushing system and an intelligent control box, wherein the slide is arranged on the shorter side of the beam body of the cantilever beam, the balance box is arranged on the slide and a sliding fit is formed between the two, the reaction seat is arranged on the beam body and is located at the rear side of the slide, the pushing system is arranged between the balance box and the reaction seat for pushing the balance box so that it slides along the slide, and the intelligent control box is arranged on the beam body. The intelligent control box collects the vertical pressure of the balance box and connects and controls the pushing distance of the pushing system accordingly.

[0008] Two or more slideways are evenly spaced along the longitudinal direction of the beam body of the cantilever beam, and each slideway is provided with a balance box, and each balance box is provided with a corresponding reaction seat and the jacking system.

[0009] The slideway includes a vertical steel plate, a horizontal steel plate, and a longitudinal scale, wherein the horizontal steel plate is fixed to the beam body of the cantilever beam through anchor bolts, the vertical steel plate is arranged above the horizontal steel plate, and the longitudinal scale is arranged on the vertical steel plate.

[0010] The vertical steel plate is provided with temporary anchoring holes for locking the balance box.

[0011] The reaction seat includes a horizontal steel plate, a vertical steel plate, and a reinforced rib plate, wherein the horizontal steel plate is fixed to the beam body of the cantilever beam by anchor bolts, the vertical steel plate is arranged on the upper side of the horizontal steel plate, and the reinforced rib plate is arranged between the horizontal steel plate and the vertical steel plate.

[0012] The balance box includes a bottom angle steel, an end reinforcement steel plate, a vertical angle steel, and a horizontal steel plate, wherein the horizontal steel plate is arranged on the bottom angle steel, the end reinforcement steel plate is arranged between the bottom angle steel and the horizontal steel plate, the vertical angle steel is arranged above the horizontal steel plate, a horizontal scale is arranged on the horizontal steel plate, and a vertical scale is arranged on the vertical angle steel.

[0013] The bottom angle steel is provided with a temporary anchoring hole for locking the balance box.

[0014] The intelligent control box includes a pressure sensor arranged at the slide.

[0015] The advantages of the utility model are: it can simultaneously and in real time meet the horizontal and vertical dual balance of the asymmetric cantilever beam, and has a high degree of intelligence; all operations are performed on the bridge, and it is suitable for small sites under the bridge; it has great application significance and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the elevation layout of the utility model;

[0017] Figure 2 This is the floor plan of the utility model;

[0018] Figure 3 This is an elevation view of the slide system of the present invention;

[0019] Figure 4 This is an elevation view of the reaction seat system in the present utility model;

[0020] Figure 5 This is an elevation view of the balance box system in the present utility model;

[0021] Figure 6 This is a planar layout diagram of the utility model when applied to a curved beam with unbalanced counterweight. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0023] like Figure 1-6 As shown, the symbols in the figure represent: slide 1, reaction seat 2, balance box 3, push system 4, intelligent control box 5;

[0024] Anchor bolts 11, vertical steel plates 12, horizontal steel plates 13, longitudinal scales 14, temporary anchor holes 15;

[0025] Vertical steel plate 21, horizontal steel plate 22, stiffening rib plate 23, anchor bolts 24;

[0026] Bottom angle steel 31, temporary anchor holes 32, end reinforcement steel plates 33, vertical angle steel 34, horizontal steel plates and rulers 35, vertical distance rulers 36;

[0027] Pressure sensor 51.

[0028] Example: Figures 1 to 6 As shown, the movable counterweight system for asymmetric cantilever beam construction in this embodiment includes five units, the first unit is a slide 1 fixed to the bridge deck, the second unit is a reaction seat 2 fixed to the bridge deck, the third unit is a balance box 3 and its locking unit, the fourth unit is a jacking system 4, and the fifth unit is an intelligent control box 5.

[0029] Specifically, the slide 1 realizes the sliding of the balance box 3 by setting an inverted T-shaped steel member. The T-shaped steel member can be welded by a vertical steel plate 12 and a horizontal steel plate 13, wherein temporary anchoring holes 15 are evenly arranged on the outer side of the vertical steel plate 12. The spacing between each temporary anchoring hole 15 is about 0.5m, and the spacing and size of the bolt holes can be adjusted according to the shear force of the bolts.

[0030] In this embodiment, a fixing device for the balance box 3 is arranged on the vertical steel plate 12, which is used to lock the balance box 3 by balancing the weight to an appropriate position to prevent the balance box 3 from being unstable on a bridge deck with a longitudinal slope.

[0031] In this embodiment, a longitudinal scale 14 is provided on the vertical steel plate 12, which can accurately control the position of the balance box 3, that is, realize accurate counterweighting, minimize the unbalanced bending moment, and achieve real-time balance.

[0032] In this embodiment, if Figure 2As shown, the slideway 1 can be arranged in 2-4 groups according to the width of the bridge deck, which can realize unbalanced counterweights in various longitudinal and transverse situations, and can offset the unbalanced longitudinal and transverse spacing.

[0033] In this embodiment, butter PTFE powder is applied on the inner horizontal steel plate 13 to reduce friction resistance, thereby facilitating the forward movement of the balance box 3.

[0034] The reaction seat 2 is composed of a vertical steel plate 21, a horizontal steel plate 22, a stiffening rib plate 23 and an anchor bolt 24. The anchor bolt 24 is buried in the bridge deck during construction, and the horizontal steel plate 22 and the anchor bolt 24 are connected during counterweighting. The other steel plates are welded to complete the arrangement of the reaction seat 2. The height of the vertical steel plate 21 is determined according to the size and action point of the jack.

[0035] The balance box 3 is divided into two parts, the lower part is welded into a rectangular frame with bottom angle steel 31, in which large-sized angle steel is used on the top pushing side, and end reinforcement steel plates 33 are added locally at the stress points. The upper part can be made of wooden boards or other materials to make vertical angle steel 34 for easy lifting, and together with the lower part, a semi-enclosed box that can accommodate heavy objects is formed through horizontal steel plates.

[0036] In this embodiment, the bottom angle steel 31 of the balance box corresponds to the size and spacing of the slide 1, and the spacing is controlled to be 3 mm on each side. At the same time, temporary anchoring holes 32 are arranged on the bottom angle steel 31, which correspond to the spacing of the temporary anchoring holes 15 set on the slide 1, so as to facilitate positioning.

[0037] The jacking system 4 adopts an automatically controlled jack, which is arranged along the bridge axis.

[0038] The intelligent control box 5 is mainly a pressure sensor 51 arranged on the horizontal steel plate 13 of the slide 1. The pressure sensor 51 senses the vertical pressure from the balance box 3, uses wireless transmission, and then feeds back to the pushing system 4 to achieve automatic control of the pushing distance.

[0039] For a (60+35)m asymmetric linear cantilever beam with a 22m width and variable height, the beam height at the center support is 7m, and the beam height at the side support is 3m. The first 35m is cast symmetrically, while the last 25m section is cast asymmetrically. The movable counterweight system in this embodiment is applied to solve the counterweight problem of the asymmetric and unbalanced cantilever beam, which includes the following steps:

[0040] As the segment is cast in suspension, after completing the span of about 35-35m, the required steel rods are made in the factory and cast into the corresponding segment on the main beam, and the short span side reaction seat anchor bolts 24 and the anchor bolts 11 of the slideway 1 are pre-embedded in the left, middle and right sections.

[0041] At the same time, the vertical steel plates 12 and horizontal steel plates 13 of the slide 1 are made, and the longitudinal scale 14 and temporary anchor holes 15 are set on the vertical steel plate 12. At the same time, the pressure sensor 51 is pasted on the horizontal steel plate 13 to fix the slide and the anchor bolts 11. The slide is also arranged in three sections: left, middle and right, with a center spacing of 4m and a width of 2.5m for each slide.

[0042] Start installing the reaction seat 2. A reaction seat 2 is arranged at the rear position corresponding to each slide 1, and is also arranged in three places: left, middle and right. It is made of vertical steel plates 21, horizontal steel plates 22 and stiffening ribs 23. The stiffening ribs 23 correspond to the position of the jack and are arranged symmetrically on the left and right.

[0043] Apply butter and PTFE powder on the horizontal steel plate 13 of the slide 1.

[0044] Make a balance box 3. The bottom plate of the balance box 3 is surrounded by a frame welded with bottom angle steel 31, and then it is welded into a box shape using vertical angle steel 34. The four sides are reinforced with horizontal steel plates. The bottom plate is arranged with T-steel spacing of 0.5m, and then wooden boards are placed to support other heavy objects. The bottom angle steel 31 is coated with butter and PTFE powder, and then the vertical distance ruler 36 is set according to the vertical and bulk density of the heavy object. At the same time, a horizontal ruler is set and the balance box 3 is docked on the slide 1 as needed.

[0045] Arrange the jacking system 4. Each slideway jacking system consists of two jacks and horizontal round steel. The horizontal jack provides power, and the round steel is used for long-distance jacking. At the same time, it is connected to the intelligent control box 5. The intelligent control box 5 can use wireless transmission.

[0046] As other sections on the long span side are poured, the jacking range is entered into the intelligent control box 5 until the pressure sensor 51 returns data, which automatically terminates the process. A buckle lock is set between the temporary anchoring holes 15 and 32. At the same time, an over-the-top limit device should be set in advance at the end of each jacking section, using a movable small angle steel.

[0047] At the same time, the next section is cast on the long span side. Synchronously, the buckle between the temporary anchoring hole 15 and the temporary anchoring hole 32 is released to unlock the balance box 3. The jacking system slowly pushes the balance box 3 to the next point until the data transmission is terminated.

[0048] In this reciprocating manner, for unbalanced casting segments, especially for cantilever beams and high piers with a difference of 15-25m and about 4 segments, this system has effectively solved the counterweight problem of asymmetric and unbalanced cantilever beams.

[0049] like Figure 6 As shown, for an unbalanced curved beam, the movable counterweight system of this embodiment is applied to solve the counterweight problem of dual imbalance in the longitudinal and transverse directions, which includes the following steps:

[0050] On the outside of the curve, the balance box 3 on the outside is pushed faster, the balance box 3 in the middle is pushed slightly slower, and the balance box 3 on the inside is pushed slower, so that a longitudinal and transverse double counterweight is formed to better maintain balance on the curved beam.

[0051] During the specific implementation of this embodiment, in application, the balance box 3 can be filled with appropriate materials as needed, and then according to the project needs, the balance box 3 can be automatically moved to different positions according to different working conditions through the coordinated work of various units, thereby achieving the longitudinal and transverse counterweight problems in the ultimate unbalanced state. All operations are performed on the bridge, which has great application significance for bridge projects with high piers, limited space under the bridge, large unbalanced moments and changes.

[0052] Although the above embodiments have described the concepts and embodiments of the present invention in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described here one by one.

Claims

1. A movable counterweight system for asymmetric cantilever beam construction, characterized by: It includes a slide, a reaction seat, a balance box, a pushing system and an intelligent control box, wherein the slide is arranged on the shorter side of the beam body of the cantilever beam, the balance box is arranged on the slide and the two form a sliding fit, the reaction seat is arranged on the beam body and is located at the rear side of the slide, the pushing system is arranged between the balance box and the reaction seat for pushing the balance box to make it slide along the slide, the intelligent control box is arranged on the beam body, and the intelligent control box collects the vertical pressure of the balance box and connects to control the pushing distance of the pushing system accordingly.

2. The movable counterweight system for asymmetric cantilever beam construction according to claim 1, characterized in that: Two or more slideways are evenly spaced along the longitudinal direction of the beam body of the cantilever beam, and each slideway is provided with a balance box, and each balance box is provided with a corresponding reaction seat and the jacking system.

3. A movable counterweight system for asymmetric cantilever beam construction according to claim 1 or 2, characterized in that: The slideway includes a vertical steel plate, a horizontal steel plate, and a longitudinal scale, wherein the horizontal steel plate is fixed to the beam body of the cantilever beam through anchor bolts, the vertical steel plate is arranged above the horizontal steel plate, and the longitudinal scale is arranged on the vertical steel plate.

4. The movable counterweight system for asymmetric cantilever beam construction according to claim 3, characterized in that: The vertical steel plate is provided with temporary anchoring holes for locking the balance box.

5. A movable counterweight system for asymmetric cantilever beam construction according to claim 1 or 2, characterized in that: The reaction seat includes a horizontal steel plate, a vertical steel plate, and a reinforced rib plate, wherein the horizontal steel plate is fixed to the beam body of the cantilever beam by anchor bolts, the vertical steel plate is arranged on the upper side of the horizontal steel plate, and the reinforced rib plate is arranged between the horizontal steel plate and the vertical steel plate.

6. A movable counterweight system for asymmetric cantilever beam construction according to claim 1 or 2, characterized in that: The balance box includes a bottom angle steel, an end reinforcement steel plate, a vertical angle steel, and a horizontal steel plate, wherein the horizontal steel plate is arranged on the bottom angle steel, the end reinforcement steel plate is arranged between the bottom angle steel and the horizontal steel plate, the vertical angle steel is arranged above the horizontal steel plate, a horizontal scale is arranged on the horizontal steel plate, and a vertical scale is arranged on the vertical angle steel.

7. The movable counterweight system for asymmetric cantilever beam construction according to claim 6, characterized in that: The bottom angle steel is provided with a temporary anchoring hole for locking the balance box.

8. The movable counterweight system for asymmetric cantilever beam construction according to claim 1, characterized in that: The intelligent control box includes a pressure sensor arranged at the slide.

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