Main truss rear fulcrum structure and cantilever bridge fabrication machine

Abstract

The utility model discloses a main truss rear fulcrum structure which comprises a reverse jacking wheel, a bearing seat, a first telescopic component and a second telescopic component, the first telescopic component and the second telescopic component are arranged on a rear fulcrum of a main truss in the height direction of a beam body, the bearing seat is detachably arranged on a web plate of the beam body, the bearing seat is arranged above the first telescopic component, and the second telescopic component is arranged above the first telescopic component. And the reverse jacking wheel is arranged on the second telescopic component. The cantilever bridge fabrication machine comprises the main truss and the main truss rear fulcrum structure. During pouring, the bearing seat exerts downward force on the rear supporting point of the main truss, and pouring load can be transmitted to a beam body web through the bearing seat, so that pressure borne by a beam body wing plate is dispersed, and the beam body wing plate is prevented from being crushed. The first telescopic component is located between the rear fulcrum of the main truss and the bearing seat, the height difference between the bearing seat and the main truss can be matched by adjusting the extending height of the first telescopic component, the positioning requirement for the bearing seat and the main truss is lowered, use is more convenient, and the structure is simple and effective.

Description

TECHNICAL FIELD

[0001] The utility model relates to hanging basket technical field especially relates to a main truss rear fulcrum structure and contain the cantilever bridge construction machine of this main truss rear fulcrum structure. BACKGROUND

[0002] Cantilever pouring construction refers to the construction method that special equipment is used to pour concrete beam body symmetrically and balancedly to the midspan in sections on both sides of the bridge along the bridge direction with the bridge pier as the center, and prestress is applied in sections. The hanging basket is a special equipment used to bear the dead weight of the beam body and construction load and move forward in sections when pouring concrete beam body by cantilever method. The cantilever bridge construction machine belongs to the hanging basket, and its structural feature is that the main force bar is located below the beam surface.

[0003] In the conventional cantilever bridge construction machine, the main truss is a cantilever structure, the main truss rear fulcrum is in contact with the beam wing plate through the oil cylinder in the pouring state, and the rear fulcrum transmits the reaction force to the beam wing plate. Due to the different design of the beam structure and the weight of the beam, the overall rear fulcrum reaction force of part of the beam is too large, and the beam wing plate is usually thin, which has the risk of crushing the wing plate, thereby reducing the applicability of the cantilever bridge construction machine.

[0004] Therefore, the Chinese patent document CN 211441321 U proposes a main truss rear fulcrum structure, which is provided with a bearing seat on the beam web. When pouring, the upper side of the main truss is in abutment with the bearing seat, the bearing seat applies a downward force to the rear fulcrum of the main truss, and the pouring load can be transmitted to the beam web through the bearing seat, thereby avoiding crushing the beam wing plate. The upper side of the main truss is directly in abutment with the bearing seat and cannot be adjusted, so the positioning of the bearing seat and the main truss needs to be relatively accurate, which increases the construction difficulty. In addition, due to the simple structure of the bearing seat, the bearing seat cannot provide a force to the main truss to prevent the main truss from spreading outward. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, and provide a main truss rear fulcrum structure which is simple in structure, convenient to use and beneficial to reducing the positioning requirement.

[0006] The utility model further provides a cantilever bridge construction machine comprising the main truss rear fulcrum structure.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A main truss rear fulcrum structure, comprising a reverse jacking wheel, a bearing seat, a first telescopic component and a second telescopic component, the first telescopic component and the second telescopic component are arranged at the rear fulcrum of the main truss along the height direction of the beam, the bearing seat is detachably arranged on the beam web, the bearing seat is arranged above the first telescopic component, and the reverse jacking wheel is arranged on the second telescopic component.

[0009] As a further improvement of the above technical solution: the top of the bearing seat is provided with a slope part for cooperating with the bottom of the wing plate of the beam body.

[0010] As a further improvement of the above technical solution: a connecting assembly is arranged on the bearing seat along the transverse direction of the beam body, and the connecting assembly is used for detachably arranging the bearing seat on the web plate of the beam body.

[0011] As a further improvement of the above technical solution: a third telescopic part is arranged on the connecting assembly along the transverse direction of the beam body, and the third telescopic part is used for adjusting the distance between the bearing seat and the web plate of the beam body.

[0012] As a further improvement of the above technical solution: the connecting assembly comprises a pole beam and connecting rods arranged at both ends of the pole beam, the pole beam is arranged on the side of the bearing seat away from the web plate of the beam body along the transverse direction of the beam body, and the connecting rods are respectively penetrated through the bearing seat and the web plate of the beam body and locked by fasteners.

[0013] As a further improvement of the above technical solution: a support is arranged on the side of the bearing seat away from the web plate of the beam body, and the support is arranged along the transverse direction of the beam body and abuts against the side of the main truss away from the web plate of the beam body along the transverse direction of the beam body.

[0014] As a further improvement of the above technical solution: the support is a rod and a thread is arranged on the surface of the rod, and a threaded hole is arranged on the bearing seat, and the rod is penetrated in the threaded hole.

[0015] As a further improvement of the above technical solution: an extension is arranged on the side of the bearing seat away from the web plate of the beam body along the height direction of the beam body, and the support is arranged on the extension.

[0016] As a further improvement of the above technical solution: the bearing seat is a U-shaped seat and the opening of the U-shaped seat is arranged downward, and the first telescopic part is arranged at the opening of the U-shaped seat.

[0017] A cantilever bridge machine comprises a main truss, and the cantilever bridge machine further comprises the main truss rear support point structure.

[0018] Compared with the prior art, the cantilever bridge machine has the advantages that:

[0019] The utility model discloses a main truss rear fulcrum structure is provided with bearing seat on the web of beam body, and when pouring, bearing seat exerts the downward force to the rear fulcrum of main truss, and the pouring load can be transmitted to the web of beam body through bearing seat to disperse the pressure that the wing plate of beam body receives, avoids causing the wing plate of beam body to be pressed to break down, and the first telescopic part is located between the rear fulcrum of main truss and bearing seat, can adjust the jacking height of first telescopic part to adapt the height difference between bearing seat and main truss, reduces the positioning requirement to bearing seat and main truss, and it is more convenient to use, and the structure is simple, effective.

[0020] The utility model discloses a cantilever bridge machine, including above -mentioned main truss rear fulcrum structure, thus also have above -mentioned advantage.

[0021] The other features and advantages of the utility model will be explained in detail in the subsequent specific embodiment part. DRAWINGS

[0022] Figure 1 It is the side view structural schematic diagram of the utility model embodiment one.

[0023] Figure 2 It is the front view structural schematic diagram of the utility model embodiment one.

[0024] Figure 3 It is the side view structural schematic diagram of the utility model embodiment two.

[0025] Figure 4 It is the front view structural schematic diagram of the utility model embodiment two.

[0026] Figure 5 It is the side view structural schematic diagram of bearing seat in the utility model.

[0027] Figure 6 It is the front view structural schematic diagram of bearing seat in the utility model.

[0028] The various reference numerals in the drawing represent: 1, counter wheel;11, second telescopic part;2, bearing seat;21, support piece;22, inclined surface part;23, extension part;3, first telescopic part;4, main truss;5, beam body;51, web of beam body;52, wing plate of beam body;6, connecting assembly;61, pole beam;62, connecting rod;63, fastener;7, third telescopic part. CONCRETE EMBODIMENT

[0029] In the description of the utility model, it is understood that the directions or position relations indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are the directions or position relations shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0030] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0031] In the utility model, unless otherwise specifically defined and limited, the terms "assembly", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] The utility model will be further described in detail below in combination with the drawings and specific embodiments of the specification.

[0033] Embodiment one

[0034] Figure 1 、 Figure 2 、 Figure 5 and Figure 6 An embodiment of the utility model main truss rear support point structure is shown, the main truss rear support point structure of this embodiment, including counter jacks 1, bearing seat 2, first telescopic part 3 and second telescopic part 11, first telescopic part 3 and second telescopic part 11 are arranged in the rear support point of main truss 4 along the height direction of beam body 5, bearing seat 2 is detachably arranged on beam body web plate 51, bearing seat 2 is arranged above first telescopic part 3, counter jacks 1 are arranged on second telescopic part 11. Wherein, the height direction of beam body 5 is the up-down direction, and the transverse direction of beam body 5 is the width direction or the left-right direction.

[0035] In this embodiment, the first telescopic component 3 needs to be manually adjusted to extend upward, for example, it can be a mechanical telescopic rod or a jack; the second telescopic component 11 is a hydraulic cylinder, of course, in other embodiments, it can also be a pneumatic cylinder, an electric cylinder or an electric telescopic rod, etc., which will not be described here.

[0036] The working principle of the rear support point structure of the main truss in this embodiment is as follows:

[0037] Before pouring, on the one hand, the first telescopic component 3 extends upward to drive the bearing seat 2 to abut against the wing plate 52 of the beam body, on the other hand, the bearing seat 2 is fixed on the web plate 51 of the beam body, so as to exert a downward force on the rear support point of the main truss 4. The second telescopic component 11 is in a retracted state, and the counter-jack wheel 1 does not contact the wing plate 52 of the beam body.

[0038] After the pouring of the beam body is completed, the second telescopic component 11 extends upward to drive the counter-jack wheel 1 to abut against the wing plate 52 of the beam body, then the connection between the bearing seat 2 and the web plate 51 of the beam body is disconnected (specifically, the connecting assembly 6 is disassembled), the first telescopic component 3 is retracted to drive the bearing seat 2 to descend, then the bearing seat 2 is repeatedly subjected to the above steps after the main truss 4 is moved to the position.

[0039] The rear support point structure of the main truss in this embodiment is provided with the bearing seat 2 on the web plate 51 of the beam body, during pouring, the bearing seat 2 exerts a downward force on the rear support point of the main truss 4, the pouring load can be transmitted to the web plate 51 and the wing plate 52 of the beam body through the first telescopic component 3 and the bearing seat 2, so as to disperse the pressure on the wing plate 52 of the beam body and avoid the damage of the wing plate 52 of the beam body; the first telescopic component 3 is arranged between the rear support point of the main truss 4 and the bearing seat 2, the height difference between the bearing seat 2 and the main truss 4 can be adapted by adjusting the extension height of the first telescopic component 3, which reduces the positioning requirements of the bearing seat 2 and the main truss 4, is more convenient to use, and has a simple and effective structure.

[0040] In this embodiment, the top of the bearing seat 2 is provided with a slope portion 22 for cooperating with the bottom of the wing plate 52 of the beam body. The slope portion 22 arranged on the top of the bearing seat 2 can increase the contact area between the bearing seat 2 and the bottom of the wing plate 52 of the beam body, disperse the pressure on the wing plate 52 of the beam body, and further reduce the risk of damaging the wing plate 52 of the beam body.

[0041] In this embodiment, the bearing seat 2 is provided with a connecting assembly 6 along the transverse direction of the beam body 5, and the connecting assembly 6 is used to detachably arrange the bearing seat 2 on the web plate 51 of the beam body. Specifically, the connecting assembly 6 includes a carrying beam 61 and connecting rods 62 arranged at both ends of the carrying beam 61, the carrying beam 61 is arranged on the side of the bearing seat 2 away from the web plate 51 of the beam body (the left side in the figure) along the transverse direction of the beam body 5, and the connecting rods 62 pass through the bearing seat 2 and the web plate 51 of the beam body at both ends and are locked by fasteners 63. Figure 2

[0042] ​Preferably, the connecting rod 62 is made of a finished rolled threaded steel, and the fastener 63 is a locking nut, so that the connecting rod 62 can be reliably fixed to the beam web 51 through the locking nut, and the pouring load can be transferred to the beam web 51, and the connecting rod 62 can be easily disassembled.

[0043] Further, in the embodiment, the support 21 is arranged on the side of the bearing seat 2 away from the beam web 51. Figure 2 The support 21 is arranged on the left side of the bearing seat 2, and the support 21 is arranged along the transverse direction of the beam 5 and abuts against the side of the main truss 4 away from the beam web 51. The support 21 provides a force to the main truss 4 towards the beam web 51, so that the main truss 4 can be prevented from being spread out to a certain extent.

[0044] As a preferred embodiment, the support 21 is a rod and has a thread on the surface, and the bearing seat 2 has a threaded hole, and the rod is arranged in the threaded hole. By rotating the support 21, the length of the support 21 can be adjusted, and the force applied to the main truss 4 can be adjusted, and the transverse position of the upper part of the main truss 4 can also be adjusted correspondingly. The structure is simple and convenient to adjust.

[0045] As a preferred embodiment, the bearing seat 2 has an extension 23 arranged along the height direction of the beam 5 on the side away from the beam web 51, and the support 21 is arranged on the extension 23, so that the support 21 can abut against the side of the main truss 4 away from the beam web 51.

[0046] As a preferred embodiment, the bearing seat 2 is a U-shaped seat with the opening facing downward, and the first telescopic component 3 is arranged at the opening of the U-shaped seat. When the first telescopic component 3 needs to move with the main truss 4, the U-shaped bearing seat 2 does not hinder the movement. The U-shaped bearing seat 2 is convenient for arranging the inclined surface 22 on the top to increase the contact area with the beam flange 52, and convenient for arranging the extension 23 on one side to arrange the support 21, and the other side can abut against the beam web 51. The overall structure is compact, and the space above the rear support point of the main truss 4 is effectively utilized.

[0047] Embodiment two

[0048] Figures 3-4 Another embodiment of the rear support point structure of the main truss is shown, and the rear support point structure of the main truss in the embodiment is basically the same as that in embodiment one, and the difference is that:

[0049] In the embodiment, the first telescopic component 3 can automatically adjust the height of the upward extension, which can be a hydraulic cylinder, an electric telescopic rod, etc. Further, a third telescopic component 7 (such as a hydraulic cylinder, etc.) is arranged on the connecting assembly 6 along the transverse direction of the beam 5, and the third telescopic component 7 is used to adjust the distance between the bearing seat 2 and the beam web 51.

[0050] Compared to Example 1, the main truss rear support structure in this example has a higher degree of automation, which helps to reduce manual operation.

[0051] Before pouring, the first telescopic component 3 automatically extends upward, causing the bearing seat 2 to abut against the beam flange 52. On the other hand, the third telescopic component 7 extends towards the beam web 51, causing the bearing seat 2 to abut against the beam web 51. Then, the bearing seat 2 is fixed to the beam web 51 by the connecting component 6.

[0052] During travel, the first telescopic component 3 retracts and separates from the bearing seat 2, and the support component 21 is loosened until it separates from the main truss 4. The second telescopic component 11 extends upward, driving the anti-top wheel 1 to rise and press against the beam wing plate 52. At this time, the bearing seat 2 does not affect the travel of the main truss 4.

[0053] Example 3

[0054] The cantilever bridge-building machine of this embodiment includes the main truss 4 and the aforementioned main truss rear support structure.

[0055] The cantilever bridge-building machine of this embodiment includes the aforementioned main truss rear support structure, and therefore also has the aforementioned advantages.

[0056] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A rear support structure for a main truss, characterized in that: It includes a top roller (1), a support seat (2), a first telescopic component (3) and a second telescopic component (11). The first telescopic component (3) and the second telescopic component (11) are located at the rear support of the main truss (4) along the height direction of the beam (5). The support seat (2) is detachably mounted on the web plate (51) of the beam. The support seat (2) is located above the first telescopic component (3). The top roller (1) is located on the second telescopic component (11).

2. The main truss rear support structure according to claim 1, characterized in that: The top of the bearing seat (2) is provided with a beveled part (22) for engaging with the bottom of the beam flange (52).

3. The main truss rear support structure according to claim 1 or 2, characterized in that: The bearing seat (2) is provided with a connecting component (6) along the transverse direction of the beam (5), and the connecting component (6) is used to detachably mount the bearing seat (2) onto the web plate (51) of the beam.

4. The main truss rear support structure according to claim 3, characterized in that: The connecting assembly (6) is provided with a third telescopic component (7) along the transverse direction of the beam (5), and the third telescopic component (7) is used to adjust the distance between the bearing seat (2) and the web plate (51) of the beam.

5. The main truss rear support structure according to claim 3, characterized in that: The connecting assembly (6) includes a spreader beam (61) and connecting rods (62) located at both ends of the spreader beam (61). The spreader beam (61) is located on the side of the bearing seat (2) away from the web plate (51) of the beam body (5) along the transverse direction of the beam body (5). The two ends of the connecting rods (62) pass through the bearing seat (2) and the web plate (51) of the beam body, respectively, and are locked by fasteners (63).

6. The main truss rear support structure according to claim 1 or 2, characterized in that: A support member (21) is provided on the side of the bearing seat (2) away from the web plate (51) of the beam. The support member (21) is arranged along the transverse direction of the beam (5). The support member (21) is used to abut against the side of the main truss (4) away from the web plate (51) of the beam (5) along the transverse direction of the beam (5).

7. The main truss rear support structure according to claim 6, characterized in that: The support member (21) is a rod with threads on its surface, and the bearing seat (2) has a threaded hole, through which the rod passes.

8. The rear support structure of the main truss according to claim 6, characterized in that: The bearing seat (2) has an extension (23) on the side away from the web plate (51) of the beam (5) along the height direction of the beam (5), and the support member (21) is provided on the extension (23).

9. The main truss rear support structure according to claim 1 or 2, characterized in that: The support seat (2) is a U-shaped seat with its opening facing downwards, and the first telescopic component (3) is located at the opening of the U-shaped seat.

10. A cantilever bridge-building machine, comprising a main truss (4), characterized in that: The cantilever bridge-building machine also includes a main truss rear support structure as described in any one of claims 1 to 9.

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