Horizontal mounting and adjusting structure for special-shaped steel box girder

Abstract

The utility model discloses a special-shaped steel box girder horizontal installation adjusting structure which comprises two sets of adjusting mechanisms transversely arranged on a bridge pier, and each adjusting mechanism comprises a fixed fulcrum fixed to the bridge pier and close to the outer side of the bridge pier, a chain block, a jack, a linear rail and a set of rail supporting wheel set. The linear track is horizontally laid on the top face of a pier, the track supporting wheel set is in rolling fit with the linear track through track wheels of the track supporting wheel set, a base of the jack is fixedly installed on the supporting wheel set, and a plunger rod of the jack is vertically upward. The chain end of the chain block is fixedly connected with the steel box girder, and a fixing hook of the chain block is fixedly connected with the fixing fulcrum. The adjusting structure can adjust the horizontal position of the steel box girder in the process of hoisting the overweight steel box girder in place, and is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of construction and installation of steel box girder bridges, in particular to a horizontal installation adjustment structure of a special-shaped steel box girder. Background Art

[0002] Existing steel structure bridges are generally installed in sections, and are mostly installed by hoisting. Conventional steel structure bridges are generally horizontal bridge decks or rectangular steel box girders. During hoisting, it is generally only necessary to correct the joints, and in many cases it can be completed by manpower and ordinary tools such as crowbars. However, for the steel box girder under construction this time, its structure is a three-dimensional shape, and it can only be hoisted by a crane due to the influence of the surrounding environment. The tonnage of a single steel box girder is as high as more than 40 tons. During hoisting, not only the two ends need to be seamlessly connected, but also the horizontal position and vertical height between it and the pier support need to be adjusted and the error must be strictly controlled according to the design. For this reason, a specially designed adjustment structure is required to meet the requirements for the lateral movement of the steel box girder during installation. Utility Model Content

[0003] The utility model provides a horizontal installation adjustment structure for a special-shaped steel box beam, which can adjust the horizontal position of the cross section of the steel box beam when the steel box beam is hoisted and installed, so as to meet the design and installation requirements and solve the problems in the background technology.

[0004] The technical solution of the utility model is as follows: a horizontal installation and adjustment structure of a special-shaped steel box girder, including two sets of adjustment mechanisms arranged horizontally on the pier, and the two sets of adjustment mechanisms are symmetrically arranged; each set of adjustment mechanisms includes a fixed fulcrum fixed on the pier and close to the outer side of the pier, a hand chain hoist, a jack, a linear track and a set of track support wheel groups, the linear track is horizontally laid on the top surface of the pier, the track support wheel group is rollingly matched with the linear track through its track wheels, the base of the jack is fixedly installed on the support wheel group, and the plunger rod of the jack is vertically upward; the chain end of the hand chain hoist is fixedly connected to the steel box girder, and the fixed hook of the hand chain hoist is fixedly connected to the fixed fulcrum, and the steel box girder can be caused to be subjected to a pulling force biased toward the outer side of the pier through the hand chain hoist, so as to cause the steel box girder to move horizontally toward the outer side of the pier along the linear track under the support of the jack and the track support wheel group.

[0005] Further: the linear track is horizontally placed on the bridge pier, and the base of the jack is in contact with the track supporting wheel set.

[0006] Further: the fixed fulcrum includes an L-shaped right-angle anchor plate, which is fixed to the edge of the pier by anchor bolts, and one of the plate surfaces of the L-shaped right-angle anchor plate is parallel to the top surface of the pier, which is called the horizontal plate surface, and a hook is welded on the horizontal plate surface for use by the fixed hook of the hand winch.

[0007] Further: it also includes a limit plate, the limit plate surface is vertically fixed on the bridge pier, and the limit plate is used to limit the steel box girder horizontally during hoisting.

[0008] Beneficial effects of this solution: The special-shaped steel box beam horizontal installation adjustment structure of this solution can realize the horizontal position adjustment of the steel box beam during the process of hoisting the overweight steel box beam into place. It has a simple structure and is easy to operate. In addition, during the operation, the jack not only supports the steel box beam in the vertical direction, but also supports it in alignment during the horizontal adjustment of the steel box beam, so the safety factor is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model in which the steel box girder is hoisted into place through an adjusting structure. DETAILED DESCRIPTION

[0010] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0011] Steel box girder 1, support 2, bridge pier 3, L-shaped right-angle anchor plate 4, hook 5, jack 6, plunger rod 61, hand hoist 7, linear track 8, track support wheel set 9, track wheel 91, and limit plate 10.

[0012] like Figure 1 As shown, the utility model discloses a special-shaped steel box girder horizontal installation adjustment structure, including a bridge pier 3, by arranging two sets of adjustment mechanisms horizontally on the bridge pier 3 to temporarily support the steel box girder 1 during hoisting. A support 2 is arranged on the bridge pier 3. It should be noted that: after the steel box girder 1 is installed, it is supported on the bridge pier 3 by the support 2.

[0013] The adjustment mechanism used in this scheme requires two sets to be adjusted simultaneously on a bridge pier 3. For each set of adjustment mechanism, it includes a fixed fulcrum fixed on the bridge pier 3 and close to the outside of the bridge pier 3, a hand winch 7, a jack 6, a linear track 8 and a set of track support wheel sets 9. The linear track 8 is laid horizontally on the top surface of the bridge pier 3. The track support wheel set 9 rolls with the linear track 8 through its track wheel 91. The base of the jack 6 is fixedly mounted on the support wheel set, and the plunger rod 61 of the jack 6 is vertically upward. The chain end of the hand winch 7 is fixedly connected to the steel box girder 1, and the fixed hook of the hand winch 7 is fixedly connected to the fixed fulcrum.

[0014] The linear track 8 in this solution is essentially a strip track, which can be made of I-beams, channel steels, or rectangular square tubes. The track support wheel set 9 is also a common steel track wheel 91 set. Generally, the track wheel 91 set includes a plurality of track wheels 91, and then all the track wheels 91 are connected through a track frame to form a track wheel 91 set. The track wheels 91 of the track wheel 91 set roll with the existing track and can slide back and forth along the linear track 8.

[0015] Under normal circumstances, the linear track 8 should be fixed by anchor bolts, etc. However, in this solution, the best way is to place the existing track directly on the top surface of the pier 3. And the jack 6 should not be connected to the track support wheel set 9, but should be abutted.

[0016] It should be noted that the fixed fulcrum in this scheme includes both fixed points of embedded structures such as fixed tie bars and pull rings set on the pier 3 and fixed pull points set on the pier 3 in other structural ways. The principles are the same, and they are only used to provide a fixed pull point for the hand chain hoist 7. However, in this optimized scheme, the fixed fulcrum includes an L-shaped right-angle anchor plate 4. The L-shaped right-angle anchor plate 4 is fixed to the edge of the pier 3 by anchor bolts, and one of the plate surfaces of the L-shaped right-angle anchor plate 4 is parallel to the top surface of the pier 3. The parallel plate surface is called a horizontal plate surface, and a hook 5 is welded on the horizontal plate surface for fixing the fixed hook of the hand chain hoist 7. On the one hand, such a structure can provide stable support for the hand chain hoist 7. On the other hand, since the shape of the right-angle anchor plate fits the shape of the edge of the pier 3 and the force-bearing area is large, it can ensure that the edge of the pier 3 is not damaged due to overload tension. At the same time, it is made of thinner steel and can be decorated for surface decoration without removing it to waste labor.

[0017] The following is a specific implementation method to illustrate the main points of the invention of this case: Figure 1 As shown, after the steel box girder 1 is installed, it needs to be accurately placed on the support 2 of the pier 3. However, during the hoisting, the ground distance between the steel box girder 1 and the support 2 is generally reserved at 3cm to 5cm. At this time, the steel box girder 1 is in a suspended state. Since the weight of the steel box girder 1 is tens of tons, it is not so easy to be shaken left and right.

[0018] In order to adjust the horizontal displacement of the steel box girder 1, it is necessary to first lift up the jack 6, and use the plunger rod 61 of the jack 6 to extend upward to fix the steel box girder 1 up and down. When the two jacks 6 of the two adjustment mechanisms lift up the steel box girder 1 at the same time, the steel box girder 1 will no longer shake up and down. At this time, the bottom of the steel box girder 1 still does not touch the support 2, but can slide left and right under the restriction of the track support wheel set 9 and the linear track 8. Then adjust the two hand winches 7. Figure 1As shown, the hand chain hoist 7 on the left is tightened and the hand chain hoist 7 on the right is loosened a little, then the steel box girder 1 slides to the left through the track support wheel set 9; the hand chain hoist 7 on the right is tightened and the hand chain hoist 7 on the left is loosened a little, then the steel box girder 1 slides to the right through the track support wheel set 9. When the installation position of the steel box girder 1 meets the design requirements, the two jacks 6 are opened at the same time, and the steel box girder 1 can be pressed from top to bottom onto the support 2 to complete the installation.

[0019] It should be noted that if the position of the steel box girder 1 needs to be fine-tuned on the longitudinal axis of the pier 3, the problem can be solved by using the jack 6 to push the linear track 8 along the longitudinal axis of the pier 3. Therefore, in this optimized solution, the linear track 8 only needs to be placed on the top surface of the pier 3, and the jack 6 and the track support wheel group 9 do not need to be fixedly connected, which is convenient for disassembly. Of course, the position adjustment of the steel box girder 1 along the longitudinal axis of the pier 3 is not within the scope of this solution, so it will not be repeated.

[0020] like Figure 1 As shown, in this solution, a pre-embedded limit plate 10 is fixed at the geometric center of the top surface of the pier 3. When the steel box girder 1 is hoisted in place, the limit plate 10 can be used to quickly locate the approximate position of the steel box girder 1. At the same time, the limit plate 10 can also prevent the steel box girder 1 from shaking too much left and right during the horizontal lateral adjustment process of the steel box girder 1.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A horizontal installation adjustment structure for a special-shaped steel box beam, characterized in that: The invention comprises two sets of adjustment mechanisms which are horizontally arranged on the bridge pier (3), and the two sets of adjustment mechanisms are arranged symmetrically with each other; each set of adjustment mechanisms comprises a fixed fulcrum fixed on the bridge pier (3) and close to the outer side of the bridge pier (3), a hand chain hoist (7), a jack (6), a linear track (8) and a set of track support wheel sets (9); the linear track (8) is horizontally laid on the top surface of the bridge pier (3), the track support wheel set (9) is rollingly matched with the linear track (8) through its track wheel (91), and the linear track (8) is rollingly matched with the track support wheel set (9) through its track wheel (91). The base of the jack (6) is installed on the supporting wheel group, and the plunger rod (61) of the jack (6) is vertically upward; the chain end of the hand chain hoist (7) is fixedly connected to the steel box girder (1), and the fixed hook of the hand chain hoist (7) is fixedly connected to the fixed fulcrum. The hand chain hoist (7) can cause the steel box girder (1) to be subjected to a pulling force biased toward the outside of the pier (3), so as to cause the steel box girder (1) to move horizontally toward the outside of the pier (3) along the linear track (8) under the support of the jack (6) and the track supporting wheel group (9).

2. The horizontal installation adjustment structure of a special-shaped steel box beam according to claim 1 is characterized in that: The linear track (8) is placed horizontally on the bridge pier (3), and the base of the jack (6) is in contact with the track support wheel set (9).

3. The horizontal installation adjustment structure of a special-shaped steel box beam according to claim 2 is characterized in that: The fixed fulcrum comprises an L-shaped right-angle anchor plate (4), which is fixed to the edge of the pier (3) by means of anchor bolts, and one of the plate surfaces of the L-shaped right-angle anchor plate (4) is parallel to the top surface of the pier (3), which is called a horizontal plate surface, and a hook (5) is welded on the horizontal plate surface to be connected to the fixed hook of the hand winch (7).

4. The horizontal installation adjustment structure of a special-shaped steel box beam according to claim 3 is characterized in that: It also comprises a limit plate (10), the surface of which is vertically fixed on the bridge pier (3), and the limit plate (10) is used to perform transverse limit on the steel box girder (1) during hoisting.

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