Walking type pushing structure for single-point supporting double-web pushing

Abstract

The utility model discloses a walking-type pushing structure for single-point supporting double-web pushing, which comprises a walking-type pushing device, a pushing device, a pushing device, a pushing device and a pushing device, wherein a sliding box is arranged at the top of the walking-type pushing device; and the carrying pole beam is arranged on the sliding box and comprises an I-shaped steel supporting mechanism and a concrete supporting mechanism, the I-shaped steel supporting mechanism is formed by connecting a plurality of I-shaped steels side by side, the length of the I-shaped steel supporting mechanism is larger than the distance between webs in the two adjacent steel box beams at the corresponding pushing fulcrums, and concrete is poured in the I-shaped steel supporting mechanism to form the concrete supporting mechanism. By the adoption of the web pushing device, stress borne by a single web in the steel box girder pushing process can be reduced, the problem that the web is insufficient in strength in the large-span flat type steel box girder walking type pushing process is solved, and the strength of the web is kept in a standard stress state in the whole pushing process.

Description

Technical Field

[0001] The utility model relates to the technical field of steel box girder jacking, in particular to a walking type jacking structure for single-point supported double web jacking. Background Art

[0002] With the development of bridge construction technology, the application of the walking jacking method of steel box girders for bridge construction is also increasing. However, it is currently mainly used in the jacking of beams with a large aspect ratio. For example, the invention patent CN 113565019A discloses a jacking construction method for large superelevation small radius circular curve steel box girders, which includes the following steps: walking jacking equipment and temporary pad beam arrangement; steel box girder assembly, which is carried out according to the designed transverse and longitudinal slopes of the beam body, and the steel box girder is pushed to the temporary pad beam on the top of the adjacent cap beam by the jacking jack on the assembly frame and the walking jacking equipment on the top of the cap beam; steel box girder curve jacking; steel box girder deviation correction. Combined with Figure 1 It can be seen that the walking jacking system only supports one side web portion during jacking. In beams with a small aspect ratio, such as beams with an aspect ratio of less than 0.04, the web height is small but the width is large, which easily leads to insufficient web stiffness, resulting in the beam being unable to meet the stress requirements during jacking, and thus making it impossible to use the walking jacking method for construction.

[0003] Therefore, in the jacking construction of beams with a small aspect ratio, how to help adjust the stress during the jacking process of the beams becomes an urgent problem to be solved. Utility Model Content

[0004] The utility model discloses a walking-type jacking structure for single-point supported double-web jacking, which can reduce the stress on a single web during the jacking process of a steel box girder, help solve the problem of insufficient web strength during the walking-type jacking process of a large-span flat steel box girder, and keep the web strength under a standard stress state during the entire jacking process.

[0005] To achieve the above purpose, the technical solution of the utility model is:

[0006] A walking type jacking structure for single-point supported double-web jacking, comprising:

[0007] A walking type pushing device, with a sliding box arranged on the top;

[0008] The shoulder pole beam is arranged on the top of the sliding box, and includes an I-beam support mechanism and a concrete support mechanism. The I-beam support mechanism is made of multiple I-beams connected side by side, and its length is greater than the distance between the webs of two adjacent steel box beams at the corresponding jacking support point. Concrete is poured inside to form the concrete support mechanism.

[0009] Furthermore, the shoulder beam further comprises a reinforcing top plate and a reinforcing bottom plate, wherein the reinforcing top plate is fixed on the top plate of the I-beam support mechanism and covers the top plate of the I-beam support mechanism, and the reinforcing bottom plate is fixed under the bottom plate of the I-beam support mechanism and covers the bottom plate of the I-beam support mechanism. Furthermore, the reinforcing top plate and the reinforcing bottom plate are made of steel plates.

[0010] Furthermore, the concrete is C25 concrete.

[0011] Furthermore, a plurality of adjustment support structures are laid on the shoulder beam at intervals, and the adjustment support structures are made of concrete poured inside a square tube. Furthermore, the length direction of the adjustment support structures is perpendicular to the jacking direction.

[0012] Furthermore, one side and / or both sides of the walking-type pushing device are provided with angle-adjustable pushing jacks.

[0013] The above-mentioned walking type jacking structure for single-point support double-web jacking has the following advantages:

[0014] (1) The utility model introduces a shoulder pole beam, and the length of the shoulder pole beam is greater than the spacing between the webs of two adjacent steel box girders at the corresponding jacking support point, so that the shoulder pole beam supports the webs of two steel box girders at the same time during the jacking process, which can reduce the stress borne by a single web during the jacking process, solve the problem of insufficient web strength during the walking jacking process of large-span flat steel box girders, and keep the web strength in the standard stress state during the entire jacking process, thereby realizing the application of the walking jacking method in the construction of beams with a small aspect ratio.

[0015] (2) The shoulder-pole beam adopts a structure combining I-beam and concrete. The I-beam has high strength and can better withstand pressure and shear force when subjected to stress. It also has good stability. Combined with further pouring of concrete, it can better ensure the rigidity and compressive strength of the shoulder-pole beam, forming a stable support during the jacking process and the jacking preparation process. It is not easy to deform itself, and it can also prevent the steel box beam from deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0017] Figure 2 yes Figure 1 Schematic diagram of the main structure of the medium-sized crawler-type pushing device, shoulder pole beam and adjustment support structure.

[0018] Figure 3 yes Figure 2 Schematic diagram of the top view of the middle shoulder pole beam.

[0019] Figure 4 yes Figure 3 Schematic diagram of the left view structure.

[0020] Figure 5 is an enlarged schematic diagram of adjusting the support structure.

[0021] Figure 6 It is a schematic diagram of the application structure of an embodiment of the utility model.

[0022] In the figure, a shoulder beam 1, an I-beam support mechanism 101, a reinforced top plate 102, a concrete support mechanism 103, a reinforced bottom plate 104, a walking type pushing device 2, a sliding box 201, an adjustment support structure 3, an angle adjustment pushing jack 4, a steel box beam body 5, and a steel box beam middle web 501 are shown. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present utility model, it should be noted that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present utility model.

[0025] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] A walking type jacking structure for single point support double web jacking, such as Figure 1-2As shown, it includes a walking-type pushing device 2 and a shoulder beam 1, wherein: the walking-type pushing device 2 has a sliding box 201 on its top, and the walking-type pushing device 2 has been widely used in the walking-type pushing method of steel box beams, and has a left and right deviation correction function, such as the deviation correction pushing jack disclosed in CN117026840A, which will not be described in detail here, and the sliding box 201 is used to support the structure above it and push forward; the shoulder beam 1, combined with Figure 3 and Figure 4 As shown, it is arranged on the top of the sliding box 201, including an I-beam support mechanism 101 and a concrete support mechanism 103. The I-beam support mechanism 101 is made of multiple I-beams connected in parallel. The multiple here refers to at least 3. In this embodiment, according to the load-bearing requirements, 5 36a I-beams are used. The I-beams are connected together by welding and spliced ​​along the width direction. Figure 6 As shown, the length of the I-beam support mechanism 101 is greater than the spacing between the webs 501 of the two adjacent steel box girders at the corresponding jacking support point. In this way, the shoulder pole beam 1 can simultaneously support the webs 501 of the two steel box girders to form a single-point supported double-web jacking structure. Concrete is poured inside the I-beam support mechanism 101 to form a concrete support mechanism 103, that is, the space surrounded by the I-beam top plate, the I-beam web, and the I-beam bottom plate is filled with concrete; the above-mentioned shoulder pole beam 1 adopts a structure combining I-beams and concrete. The I-beam has high strength and can better withstand pressure and shear force when subjected to force, and has good stability. Further combined with poured concrete, the stiffness and compressive strength of the shoulder pole beam 1 can be better guaranteed, and a stable support can be formed during the jacking process and the jacking preparation process. It is not easy to deform itself, and can also prevent the steel box girder body 5 from deformation.

[0027] Furthermore, the shoulder beam 1 also includes a reinforced top plate 102 and a reinforced bottom plate 104. The reinforced top plate 102 is fixed on the top plate of the I-beam support mechanism 101 and covers the top plate of the I-beam support mechanism 101, that is, the outer edge of the reinforced top plate 102 extends beyond the outer edge of the I-beam support mechanism 101; the reinforced bottom plate 104 is fixed under the bottom plate of the I-beam support mechanism 101 and covers the bottom plate of the I-beam support mechanism 101, that is, the outer edge of the reinforced top plate 102 extends beyond the outer edge of the I-beam support mechanism 101; the reinforced top plate 102 and the reinforced bottom plate 104 can make the I-beam support mechanism 101 better connected to form a whole, and at the same time enhance the strength of the I-beam connection position. Furthermore, the reinforced top plate 102 and the reinforced bottom plate 104 are made of steel plates to ensure sufficient strength. In this embodiment, Q345 steel plates are used.

[0028] Furthermore, in this embodiment, the concrete in the concrete support mechanism 103 is C25 concrete, which ensures the strength of the concrete support mechanism 103 .

[0029] Further, combined with Figure 1 and Figure 2 As shown, a plurality of adjustment support structures 3 are laid on the shoulder pole beam 1 at intervals, combined with Figure 5 As shown, the adjustment support structure 3 is made of concrete poured inside the square tube. The adjustment support structure 3 is added to prevent the shoulder beam 1 from being emptied during the jacking construction process. The square tube is made of steel, which can increase the friction force. The pouring of concrete can enhance the strength of the square tube. The spacing between the adjustment support structures 3 can serve as a buffer in the horizontal direction during the jacking process. Furthermore, regarding the laying method of the adjustment support structure 3, the length direction of the paving of the adjustment support structure 3 is perpendicular to the jacking direction.

[0030] Further, combined with Figure 1 As shown, one side and / or both sides of the walking-type pushing device 2 are provided with angle-adjustable pushing jacks 4, which push in the vertical direction during the construction process to cooperate with the walking-type pushing device 2 to complete the retraction operation after a pushing stroke.

[0031] Combination Figure 1 and Figure 6 As shown, it is an application scenario of this embodiment. During pushing, the walking pushing device 2 is placed below the bottom plate of the steel box girder body 5 near the two ends, that is, the bottom plate of the steel box girder body 5 near the two ends is used as the pushing fulcrum, and the shoulder pole beam 1 is placed on the sliding box 201, and the length direction is perpendicular to the pushing direction, and it can support the two steel box girder middle webs 501 at the same time, and then the adjustment support structure 3 is padded on the shoulder pole beam 1. In this embodiment, the adjustment support structure 3 is provided with 4 pieces, and 2 pieces are a group. Corresponding to the two sides below the web 501 in the steel box girder, two angle-adjustable pushing jacks 4 are respectively arranged on the front and rear sides of the walking-type pushing device 2. During pushing, the sliding box 201 of the walking-type pushing device rises first, and then lifts up the steel box girder body 5, and cooperates with the sliding box 201 to move forward, that is, the steel box girder body 5 is pushed forward. After completing a pushing stroke, the angle-adjustable pushing jacks 4 are lifted upward to support the steel box girder body 5, and the sliding box 201 descends and retracts, and then a new round of pushing stroke begins. In this embodiment, the shoulder pole beam 1 supports the middle webs 501 of two steel box girders at the same time. During the pushing process, the shoulder pole beam 1 lifts the middle webs 501 of the two steel box girders at the same time, so that the two webs are subjected to force at the same time. This can reduce the stress borne by a single web during the pushing process, solve the problem of insufficient web strength during the walking-type pushing process of large-span flat steel box girders, and keep the web strength under the standard stress state during the entire pushing process, thereby realizing the application of the walking-type pushing method in the construction of beams with a small aspect ratio.

Claims

1. A walking type jacking structure for single point support double web jacking, characterized in that include: A walking type pushing device, with a sliding box arranged on the top; The shoulder pole beam is arranged on the top of the sliding box, and includes an I-beam support mechanism and a concrete support mechanism. The I-beam support mechanism is made of multiple I-beams connected side by side, and its length is greater than the distance between the webs of two adjacent steel box beams at the corresponding jacking support point. Concrete is poured inside to form the concrete support mechanism.

2. The walking type pushing structure for single point support double web pushing according to claim 1, characterized in that: The shoulder beam also includes a reinforced top plate and a reinforced bottom plate. The reinforced top plate is fixed on the bottom plate of the I-beam support mechanism and covers the top plate of the I-beam support mechanism. The reinforced bottom plate is fixed under the top plate of the I-beam support mechanism and covers the bottom plate of the I-beam support mechanism.

3. The walking type pushing structure for single point support double web pushing according to claim 2, characterized in that: The reinforced top plate and the reinforced bottom plate are made of steel plates.

4. The walking type pushing structure for single point support double web pushing according to claim 1, characterized in that: The concrete is C25 concrete.

5. The walking type pushing structure for single point support double web pushing according to claim 1, characterized in that: A plurality of adjustment support structures are laid at intervals on the shoulder pole beam, and the adjustment support structures are made of concrete poured inside a square tube.

6. The walking type pushing structure for single point support double web pushing according to claim 5, characterized in that: The length direction of laying the adjustment support structure is perpendicular to the pushing direction.

7. The walking type pushing structure for single point support double web pushing according to claim 1, characterized in that: One side and / or both sides of the walking type pushing device are provided with angle-adjustable pushing jacks.

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