Jacking and sliding construction device for large-section double-layer cantilever steel box girder

Abstract

The utility model relates to a jacking and sliding construction device for a large-section double-layer cantilever steel box girder. The jacking and sliding construction device comprises a sliding shoe and a hydraulic crawler, wherein the sliding shoe is arranged in a sliding shoe distribution girder structure and used for providing jacking and lifting power for the steel box girder, and the hydraulic crawler is arranged on a sliding rail and used for providing sliding advancing power for the sliding shoe. The position control device can effectively achieve the effect of accurately controlling the position of the jacked and slipped steel box girder, so that the operation flexibility is improved, the construction period is shortened, the economic benefit is high, and the construction cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge lifting and sliding, in particular to a large-section double-layer cantilever steel box girder lifting and sliding construction device. Background Art

[0002] At present, with the rapid development of economy and technology, the number of bridge projects has increased rapidly, especially urban bridges. Urban bridges generally cross existing expressways or wide river basins. In order to reduce the impact on existing traffic, due to the high bearing capacity of steel beams, simple construction and short construction period, cross-line bridges are mostly designed as steel beam structures. The top-pushing construction method is generally preferred for cross-line steel beam construction. Under normal circumstances, the top-pushing construction of steel beams is equipped with guide beams and the top-pushing beam body is of equal height section. The steel beam segments are assembled by setting up an assembly platform and using a large crane. Slippers and hydraulic jack devices are set at the four corners of the steel box beam to provide power, and then the power mechanism is used to carry out top-pushing construction until the top-pushing is in place. Among them, the sliding equipment is large in size, heavy in weight, and has a small bearing capacity. It is not suitable for multi-span variable height beams, curves with changing curvatures, bridges with large vertical curvatures, and narrow spaces and indoor environments, which limits its application in complex bridge types or special terrain conditions. Utility Model Content

[0003] In view of this, the utility model proposes a jacking and sliding construction device for a large-section double-layer cantilevered steel box girder, aiming to solve the problems existing in the prior art.

[0004] Specifically, the utility model provides a large-section double-layer cantilever steel box girder jacking and sliding construction device, including a sliding shoe arranged in a sliding shoe distribution beam structure for providing jacking and lifting power for the steel box girder and a hydraulic crawler arranged on a sliding track for providing sliding forward power for the sliding shoe.

[0005] On the basis of the above solution, the sliding shoe comprises:

[0006] Cylinder sleeve structure;

[0007] A vertical cylinder and a guide cylinder are arranged in the cylinder sleeve structure and are used to adjust the position of the steel box beam segment.

[0008] On the basis of the above scheme, the hydraulic crawler includes a crawling jack and a rail clamp;

[0009] One side of the crawling jack is connected to the sliding shoe through a pin shaft, and the other side of the crawling jack is connected to the rail clamp through a pin shaft.

[0010] On the basis of the above scheme, it also includes: a first steel backing plate arranged on the upper part of the vertical oil cylinder and a cylinder cap structure arranged on the first steel backing plate for protecting the oil cylinder.

[0011] On the basis of the above scheme, the sliding shoe is a load-bearing conversion support of the steel box girder sliding unit, and slides between the sliding shoe and the sliding track;

[0012] Four sliding shoes are set on each steel box girder sliding unit;

[0013] A hydraulic crawler is set behind each skid.

[0014] The utility model provides a large-section double-layer cantilever steel box girder jacking and sliding construction device. The sliding equipment has a small size, light weight, and large bearing capacity. It is particularly suitable for horizontal sliding of large-tonnage components and equipment in a narrow space or indoors; the traditional reaction frame is abandoned, and a clamp is used to clamp the track to act as an automatic shifting reaction frame for pushing; multi-point pushing and pulling can be performed to disperse the horizontal load on the lower supporting structure; the pushing reaction force action point is very close to the sliding support point, and the track installation requirements are low; the hydraulic crawler is rigidly connected to the pushed object, the force transmission is direct, and the positioning accuracy is high; the working reliability is good and the failure rate is low; the hydraulic crawler has the self-locking property of reverse motion, which makes the sliding process very safe, and the components can be reliably locked for a long time at any position during the sliding process; the equipment has a high degree of automation, convenient and flexible operation, good safety, high reliability, wide application, and strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0016] Figure 1 This is a schematic structural diagram of the jacking and sliding construction device for the large-section double-layer cantilever steel box girder in Example 1;

[0017] Figure 2 It is a structural schematic diagram (side view) of the jacking and sliding construction device for the large-section double-layer cantilever steel box beam in Example 1;

[0018] Figure 3 It is a structural schematic diagram (plan view) of the oil cylinder sleeve structure in Example 1;

[0019] Figure 4 It is a structural schematic diagram (elevation view) of the oil cylinder sleeve structure in Example 1;

[0020] Figure 5 It is a schematic plan view of the oil cylinder cap structure in Example 1;

[0021] Figure 6 This is a schematic elevation diagram of the oil cylinder cap structure in Example 1;

[0022] Figure 7 It is a schematic plan view of the sliding shoe distribution beam structure in Example 1;

[0023] Figure 8 This is a schematic elevation diagram of the sliding shoe distribution beam structure in Example 1;

[0024] Fig. 9 This is a schematic diagram of the sliding shoe arrangement of the large-section double-layer cantilever steel box girder jacking and sliding construction device in Example 2. DETAILED DESCRIPTION

[0025] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] Example 1

[0027] like Figure 1 As shown, a large-section double-layer cantilever steel box girder jacking and sliding construction device includes a sliding shoe 1 arranged in a sliding shoe distribution beam structure 3 for providing jacking and lifting power for the steel box girder and a hydraulic crawler 2 arranged on a sliding track for providing sliding forward power for the sliding shoe 1.

[0028] The specific structure of the sliding shoe distribution beam structure 3 is as follows: Figure 7-8 shown.

[0029] like Figure 2-4 As shown, the sliding shoe 1 includes a cylinder sleeve structure 1-1 and a vertical cylinder 1-2 and a guide cylinder 1-3 arranged in the cylinder sleeve structure 1-1 for adjusting the position of the steel box beam segment. The hydraulic crawler 2 includes a crawling jack 2-1 and a rail clamp 2-2. One side of the crawling jack 2-1 is connected to the sliding shoe 1 through a pin shaft, and the other side of the crawling jack 2-1 is connected to the rail clamp 2-2 through a pin shaft. When working, the sliding shoe 1 is pushed according to the telescopic reaction force of the crawling jack 2-1 and the rail clamp 2-2, so as to achieve the effect of sliding the steel box beam forward. Among them, the crawling jack 2-1 adopts a 60t hydraulic jack.

[0030] Specifically, the sliding shoe 1 is made of steel plate to form a structure that is not damaged by force. The sliding shoe 1 bears the weight of the steel box beam, so Q355 steel plate is used. When it is compressed, the whole structure is in a static state without damage or destruction. All welding quality is first-class. Among them, a perforated ear plate is welded at the end connected to the hydraulic crawler 2, and a pin is used for connection.

[0031] like Figure 5-6 As shown, as a specific embodiment, it also includes: a first steel plate 4 arranged on the upper part of the vertical oil cylinder 1-2 and a cylinder cap structure 5 arranged on the first steel plate 4 for protecting the oil cylinder. Specifically, the thickness of the first steel plate 4 is 30 mm.

[0032] As a specific implementation scheme, the crawling jacks 2-1 of the hydraulic crawler 2 are uniformly calibrated before working, and a pump station is used to ensure that the extension and retraction amount of the crawling jacks 2-1 is uniform and consistent; the track clamp 2-2 is fixed on the sliding track, and the sliding track is fixed on the sliding platform with a horse plate, so that the sliding track does not move when it is working.

[0033] Example 2

[0034] like Fig. 9 As shown, this embodiment provides a specific implementation method based on the large-section double-layer cantilever steel box girder jacking and sliding construction device in embodiment 1. The sliding shoe 1 is the load-bearing conversion support of the steel box girder sliding unit, and slides between the sliding shoe 1 and the sliding track; 4 sliding shoes 1 are arranged on each sliding unit, and are symmetrically arranged according to the center of gravity of the sliding unit. The position of the sliding shoe 1 is preferably set at the cross intersection of the steel box girder side web and the diaphragm. When the clearance height between the upper surface of the sliding shoe 1 and the bottom plate of the steel box girder is greater than the height of the vertical cylinder 1-2, a pier or steel pad needs to be added below the vertical cylinder 1-2. A hydraulic crawler 2 is set behind each sliding shoe, and a total of 4 are arranged in a single sliding unit.

[0035] The "hydraulic synchronous sliding technology" uses a hydraulic crawler 2 as a sliding drive device; the hydraulic crawler 2 is a combined structure, one end of which is connected to the sliding track with a wedge-shaped clamp, and the other end is connected to the sliding tire frame or component in the form of a hinge point, and a hydraulic cylinder is used in the middle to drive the crawling.

[0036] Specific steps:

[0037] (1) The supporting object is 2H900x300 steel, and a small steel plate is used to fix the track on the upper side to prevent it from sliding back and forth; the vertical cylinder 1-2 and the guide cylinder 1-3 are installed and fixed on the inner side of the sliding shoe distribution beam structure 3, and then covered with the cylinder cap structure 5; the vertical cylinder 1-2 is started, and the steel box beam is separated from the assembly support platform under the action of the vertical cylinder 1-2.

[0038] (2) An ear plate with holes is welded on the rear side of the sliding shoe 1 and connected to the crawling jack 2-1 of the hydraulic crawler 2 by a pin; the other side of the crawling jack 2-1 is installed with the track clamp 2-2 by a pin, and a clamp is placed inside the track clamp 2-2 to clamp the track.

[0039] (3) "Hydraulic synchronous sliding technology" uses a hydraulic crawler 2 as a sliding drive device. The hydraulic crawler 2 is a combined structure, one end of which is connected to the sliding track with a wedge-shaped clamp block, and the other end is connected to the sliding tire frame or component in the form of a hinge point, and a hydraulic cylinder is used in the middle to drive the crawling.

[0040] (4) Start the hydraulic crawler 2, fasten the rail clamp 2-2, and slide the shoe 1 forward under the action of the crawling jack 2-1, while driving the steel box girder on it to move; when the crawling jack 2-1 reaches the maximum stroke, release the rail clamp 2-2, retract the crawling jack 2-1, and push it upside down to restore it according to the progress. Repeat the operation in coordination with the guide cylinder 1-3 until the steel box girder slides to the designed position.

[0041] Compared with conventional jacking and sliding construction devices, the large-section double-layer cantilever steel box girder jacking and sliding construction device of the present application has the advantages of saving labor and materials, shortening construction period, being economical and efficient, simple work, and improving construction accuracy. In terms of effectiveness, it can shorten the construction period by days, generating good economic benefits, and the jacking direction can be changed at will by changing the jacking position. It is flexible in operation and has high construction accuracy and quality.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A jacking and sliding construction device for a large-section double-layer cantilever steel box beam, characterized in that: It comprises a sliding shoe (1) arranged in a sliding shoe distribution beam structure (3) for providing a tightening and lifting power for a steel box beam, and a hydraulic crawler (2) arranged on a sliding track for providing a sliding forward power for the sliding shoe (1); The sliding shoe (1) comprises: Cylinder sleeve structure (1-1); A vertical oil cylinder (1-2) and a guide oil cylinder (1-3) arranged in the oil cylinder sleeve structure (1-1) for adjusting the position of the steel box beam segment; It also comprises: a first steel backing plate (4) arranged on the upper part of the vertical oil cylinder (1-2) and a cylinder cap structure (5) arranged on the first steel backing plate (4) for protecting the oil cylinder.

2. The large-section double-layer cantilever steel box girder jacking and sliding construction device according to claim 1 is characterized in that: The hydraulic crawler (2) comprises a crawling jack (2-1) and a rail clamp (2-2); One side of the crawling jack (2-1) is connected to the sliding shoe (1) via a pin shaft, and the other side of the crawling jack (2-1) is connected to the rail clamp (2-2) via a pin shaft.

3. The jacking and sliding construction device for a large-section double-layer cantilever steel box beam according to claim 1 is characterized in that: The sliding shoe (1) is a load-bearing conversion support of the steel box beam sliding unit, and slides between the sliding shoe (1) and the sliding track; Four sliding shoes (1) are arranged on each steel box girder sliding unit; A hydraulic crawler (2) is arranged behind each sliding shoe.

Images