Vertical pre-assembling device for steel tower

Abstract

The utility model discloses a vertical pre-assembling device for a steel tower, and belongs to the technical field of bridge construction. The technical problem that the construction efficiency is affected due to the fact that pre-assembly of existing steel tower sections needs to depend on large hoisting equipment is solved. According to the technical scheme, the device comprises a bearing jig frame, the top end of the bearing jig frame abuts against the bottom faces of the steel tower sections on the bottom layer of the multiple steel tower sections through an adjusting jacking structure, the device further comprises an adjusting jig frame, the upper portion of the adjusting jig frame is composed of a vertical section and a horizontal section which are of an L-shaped structure, and an adjusting jack is placed on the horizontal section; the top end of the vertical section abuts against the bottom face of the steel tower section on the bottom layer through an adjusting jacking structure, and the end face of the lifting end of the adjusting jack makes contact with the bottom face of the steel tower section on the bottom layer. The utility model has the beneficial effects that the inclination of the axis of the section of the steel tower can be adjusted, the occupancy of equipment is greatly reduced, the maneuverability and flexibility are improved, the section hoisting time is shortened, the construction efficiency is improved, and the overall assembly precision of the steel tower can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel tower construction, and particularly relates to a vertical pre-assembly device for steel towers. Background Art

[0002] In order to achieve the combined force of "metal contact + high-strength bolts" for steel towers and the erection and assembly accuracy of all-welded steel towers at the bridge site, "n + 1" segment vertical assembly is carried out in the factory in advance. Through the rehearsal of bridge site construction, the difficulty of bridge site erection is reduced. However, during the vertical pre-assembly of multiple steel tower segments, the adjustment of the axis attitude of the bottom steel tower segment depends on large hoisting equipment, and the hoisting time is long, which affects the construction efficiency.

[0003] The connection between steel tower segments is divided into welding type, bolt connection type, and bolt-welding combination type. Comparing the three, the factory manufacturing requirements for welded steel tower segments are the lowest, the bridge site positioning difficulty is the greatest, and the influence of the deformation caused by welding heat input on the axis perpendicularity of the steel tower is also the most difficult to control. The factory manufacturing requirements for bolt-connected steel tower segments are high. It is necessary to ensure the overall flatness of the segment ports. At the same time, the control of the misalignment of the wall plates, web plates, and stiffeners is also a difficulty in segment manufacturing. The bridge site positioning and construction are relatively simple, reducing the influence of welding deformation on the axis perpendicularity. The bolt-welding combination steel tower combines all the characteristics of welded steel tower and bolt-connected steel tower, and has high requirements for both factory manufacturing and on-site connection. It can be seen that the control of the axis is particularly important in the vertical assembly of steel tower segments. Therefore, compared with welded steel towers and bolt-connected steel towers, the control of the axis is more critical in the vertical assembly of bolt-welding combination steel towers. Content of the Utility Model

[0004] Aiming at the existing deficiencies, the purpose of the utility model is to provide a vertical pre-assembly device for steel towers, which can adjust the axis inclination of steel tower segments, greatly reduce the occupation of equipment, improve the mobility and flexibility, reduce the segment hoisting time, improve the construction efficiency, and is also conducive to the adjustment of the overall assembly accuracy of the steel tower.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: A vertical pre-assembly device for steel towers, the device is arranged below multiple vertically assembled steel tower segments, the device includes a bearing support frame, and the top of the bearing support frame abuts against the bottom surface of the bottom steel tower segment of multiple steel tower segments through an adjusting and tightening structure; the vertical pre-assembly device for steel towers further includes an adjusting support frame, the upper part of the adjusting support frame consists of a vertical section and a horizontal section in an L-shaped structure, an adjusting jack is placed on the horizontal section, the top of the vertical section abuts against the bottom surface of the bottom steel tower segment through an adjusting and tightening structure, and the end face of the lifting end of the adjusting jack contacts the bottom surface of the bottom steel tower segment.

[0006] Further, the steel tower segment is formed by enclosing four outer wall plates. Each adjacent two outer wall plates are connected by a right-angled wall plate bent inward. A side web and a reinforcing web are respectively spanned between two opposite outer wall plates. The reinforcing web is located on the transverse center line of the end face of the steel tower segment, and the two side webs are symmetrically located on both sides of the reinforcing web respectively. The steel tower segment is a symmetric structure.

[0007] Further, a plurality of the bearing supports are respectively arranged on the bottom surfaces of the outer wall plates and the side webs. The plurality of the bearing supports are symmetrically arranged along the transverse center line and the longitudinal center line of the end face of the steel tower segment, which can make the forces on each bearing support balanced.

[0008] Further, adjusting supports are arranged at the corresponding bottom positions of the connections between the side webs and the outer wall plates of the two opposite outer wall plates. There are four adjusting supports, and the four adjusting supports are symmetrically arranged along the transverse center line and the longitudinal center line of the end face of the steel tower segment. The adjusting supports are used for axis adjustment of the bottom steel tower segment in every three steel tower segments per round.

[0009] Further, the sides of the bearing supports and the sides of the adjusting supports are connected by connecting pieces, and the connecting pieces are H-shaped steel.

[0010] Further, the steel tower vertical pre-assembly device further includes a bottom plate, the bottom plate is fixed to the ground, and the bottom surfaces of the bearing supports and the adjusting supports are respectively fixed to the bottom plate.

[0011] Further, the adjusting and tightening structure is at least a pair of triangular wooden wedges. The inclined surfaces of a pair of triangular wooden wedges are mutually attached and the bottom surfaces are mutually parallel. By adjusting the dislocation amount of a pair of triangular wooden wedges, the overall height of a pair of triangular wooden wedges is adjusted, so as to ensure that the forces on each bearing support are uniform.

[0012] Further, a backing plate is padded between the adjusting and tightening structure and the bearing supports and the adjusting supports. The backing plate is used for flexibly adjusting the distances between the bearing supports, the adjusting supports and the steel tower segment.

[0013] Further, a groove protection piece is arranged between the outer wall plate of the bottom steel tower segment and the adjusting and tightening structure. The groove protection piece effectively protects the root face machined by the groove machine from being damaged.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] (1) The structural design of the device of the present utility model is simple and general, and it can be applied to the load-bearing and axis inclination adjustment of multiple rounds and multiple segments of vertical pre-assembly of bridge steel towers. Moreover, after each round of pre-assembly, it is convenient to check the metal contact rate and the misalignment of the outer wall plates, which is beneficial to the adjustment of assembly accuracy. The device can be recycled during the vertical pre-assembly of each round of steel tower segments, liberating the need for large hoisting equipment, and saving equipment resource costs and labor costs when adjusting and restoring the axis inclination data of the steel tower segments.

[0016] (2) The groove protection piece is made according to the actual groove opened on the steel tower segment. The groove protection piece has strong operability and outstanding effects. During the vertical pre-assembly of the steel tower segment, it can effectively protect the groove accuracy of the steel tower segment and increase the bearing strength of the groove root face.

[0017] (3) The structure of the backing plate and the adjusting and tightening structure is simple and can be recycled. During the vertical pre-assembly of the steel tower segment, it can compact the gap between the steel tower segment and the bearing jig and the adjusting jig, avoiding the influence of the gap on the segment axis when the upper steel tower segment is matched with the lower steel tower segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the device of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the steel tower segment of the present utility model;

[0020] Figure 3 is Figure 1 schematic diagram of the middle section A-A;

[0021] Figure 4 is Figure 1 schematic diagram of the middle section B-B;

[0022] Figure 5 is Figure 1 schematic diagram of the middle section C-C;

[0023] Figure 6 is a schematic structural diagram of the adjusting jig of the present utility model;

[0024] Figure 7 is Figure 6 schematic diagram of the middle section A-A;

[0025] Figure 8 is Figure 3 schematic diagram of the middle section D-D;

[0026] Figure 9 is a sectional view of the groove protection piece of the present utility model;

[0027] Figure 10Elevation view of the groove protection part of the present utility model;

[0028] Figure 11 Plan view of the groove protection part of the present utility model;

[0029] Wherein, 1. Steel tower segment; 11. Outer wall plate; 12. Right-angle wall plate; 13. Side web plate; 14. Reinforcing web plate; 21. Bearing support; 22. Adjusting support; 23. Adjusting and tightening structure; 24. Groove protection part; 25. Adjusting jack; 26. Base plate; 27. Connecting piece. Detailed implementation manners

[0030] In order to clearly, accurately and completely express the technical means achieved by the present utility model, the present utility model will be further described below in conjunction with embodiments and drawings.

[0031] Embodiment 1

[0032] As Figure 1 , Figures 3 - 5 and Figure 9 shown, the steel tower vertical pre-assembly device of this embodiment includes a bearing support 21, an adjusting support 22, an adjusting and tightening structure 23, a groove protection part 24, an adjusting jack 25, a base plate 26 and a connecting piece 27. There are twenty-two steel tower segments for vertical pre-assembly using the device of this embodiment. Vertical pre-assembly is carried out with three steel tower segments in each round. The top steel tower segment of each round is the bottom steel tower segment of the next round. The device of this embodiment is arranged below the bottom steel tower segment. As Figure 2 shown, the steel tower segment 1 is surrounded by four outer wall plates 11. Each adjacent two outer wall plates 11 are connected by a right-angle wall plate 12 bent inward. A side web plate 13 and a reinforcing web plate 14 are respectively spanned between two opposite outer wall plates 11. The reinforcing web plate 14 is located on the transverse center line of the end face of the steel tower segment. The two side web plates 13 are symmetrically located on both sides of the reinforcing web plate 14.

[0033] As Figure 1 and Figure 3 shown, the top of the bearing support 21 abuts against the bottom surface of the bottom steel tower segment through the adjusting and tightening structure 23. As Figure 1 , Figure 4 and Figures 6 - 7 shown, the upper part of the adjusting support 22 is composed of a vertical section and a horizontal section in an L-shaped structure. The adjusting jack 25 is placed on the horizontal section. The top of the vertical section abuts against the bottom surface of the steel tower segment 1 through the adjusting and tightening structure 23. The end face of the lifting end of the adjusting jack 25 contacts the bottom surface of the bottom steel tower segment. As Figure 3As shown in the figure, the side of the bearing support and the side of the adjusting support are connected by a connecting member 27, and the connecting member is an H-shaped steel. Plan a suitable site according to the weight of the overall round, use the bottom plate to level the ground, and fix the bottom plate to the ground. The bottom surfaces of the bearing support and the adjusting support are fixed to the bottom plate.

[0034] Calculate the total tonnage of the heaviest round according to the number of vertical pre-assembled steel tower segments participating in the same round, plan the corresponding number of bearing supports, and use profiles to connect all the bearing supports and adjusting supports into a whole to reduce the influence of local bearing. In this embodiment, as Figure 1 , Figure 2 and Figures 3 - 5 shown, count the tonnage of the heaviest round, calculate that the number of required bearing supports is twenty. Among them, sixteen bearing supports are arranged at the bottom surfaces of the four outer wall plates 11, and four bearing supports are arranged at the bottom surface of each outer wall plate 11. The other four bearing supports are arranged at the bottom surfaces of the two side web plates 13, and two bearing supports are arranged at the bottom surface of each side web plate 13. Since the steel tower segment is a symmetric structure, the twenty bearing supports are symmetrically arranged along the transverse center line and the longitudinal center line of the end face of the steel tower segment, which can make the forces on each bearing support balanced.

[0035] Design the length of the upper horizontal section and the height of the upper vertical section of the adjusting support according to the size and jacking stroke of the adjusting jack. The length of the horizontal section can meet the placement of the adjusting jack, and at the same time, the height of the vertical section needs to meet the adjustment of the outer wall plate of the steel tower segment within a certain range in the height direction, which is convenient for multi-round jacking adjustment. As Figure 1 and Figure 4 shown, adjusting supports 22 are arranged at the corresponding bottom positions where two opposite outer wall plates 11 are connected to the side web plates 13. There are four adjusting supports 22, and the four adjusting supports are symmetrically arranged along the transverse center line and the longitudinal center line of the end face of the steel tower segment. The vertical section 221 of the adjusting support 22 corresponds to the position of the side web plate 13, and the adjusting jack 25 corresponds to the position of the outer wall plate 11. The adjusting support is used for axis adjustment of the bottom steel tower segment in each round of three steel tower segments.

[0036] Prepare the corresponding backing plates and adjusting and tightening structures according to the planned number of bearing supports and adjusting supports. According to the size of the gap between the bearing support and the steel tower segment after axis adjustment, use the backing plates 26 and the adjusting and tightening structures 23 to pad and compact the gaps between each bearing support 21 and the bottom steel tower segment 1 to prevent the subsequent influence of the gap on the axis inclination accuracy of the steel tower segment. As Figure 8As shown in the figure, the adjusting and tightening structure 23 is at least a pair of triangular wooden wedges. The inclined surfaces of the pair of triangular wooden wedges are in contact with each other and the bottom surfaces are parallel to each other. During adjustment, by adjusting the dislocation amount of the pair of triangular wooden wedges, the overall height of the pair of triangular wooden wedges is adjusted to ensure that each bearing support frame is evenly stressed. There are cushion plates 26 respectively between the adjusting and tightening structure 23 and the bearing support frame 21 and the adjusting support frame 22.

[0037] During the vertical pre-assembly, according to the actual groove form and size opened at the bottom of the outer wall plate of the bottom-layer steel tower segment, corresponding groove protection parts are manufactured, and the end surface of the groove protection part in contact with the groove of the outer wall plate of the lower-layer steel tower segment is machined. The surface roughness requirement of the contact part is not lower than the groove surface accuracy to prevent the groove surface of the bottom-layer steel tower segment from being damaged during the vertical assembly of the "(n + 1)" segment. As Figures 9 - 11 shown in the figure, a groove protection part 24 is arranged between the outer wall plate 11 of the bottom-layer steel tower segment 1 and the adjusting and tightening structure 23. The groove protection part 24 effectively protects the root face of the machined groove from being damaged.

[0038] The working process of this embodiment actually used for the vertical pre-assembly of the steel tower segment is as follows: According to the heaviest segment round counted in advance according to the vertical assembly rounds planned in advance, calculate the number of required bearing support frames 21, and arrange the positions of the support frames according to the typical cross-section of the steel tower segment 1; Select a site that meets the overall bearing weight according to the weight of the bearing support frame, the pre-assembled weight of the steel tower segment, and the weight of the bottom plate; Use steel plates and cushion beams to level the ground in the vertical assembly area, weld the bottom plate firmly to the ground embedded iron, and fill the gaps with concrete; According to the transverse center line and longitudinal center line of the end surface of the steel tower segment 1, and according to data such as the rib size of the steel tower segment, place the bearing support frame 21 and the adjusting support frame 22 in the corresponding positions and connect the bearing support frame 21 and the adjusting support frame 22 into a whole by using the connecting piece 27; After arranging the cushion plate 26 and the adjusting and tightening structure 23 on the bearing support frame 21 and the adjusting support frame 22, hoist and place the bottom-layer steel tower segment of this round onto the bearing support frame 21 and the adjusting support frame 22, and use the adjusting jack 25 to adjust the axis inclination of the steel tower segment to be the same as the axis inclination when it was at the top layer in the previous round; After the axis inclination of the steel tower segment is adjusted by the adjusting jack 25, place the groove protection part 24 at the bottom groove of the steel tower segment, and adjust and tighten the cushion plate 26 and the adjusting and tightening structure 23 according to the planned quantity and position in advance to meet the overall stress requirements of multiple steel tower segments 1 in each round.

Claims

1. A vertical pre-assembly device for a steel tower, characterized in that The device includes a bearing jig (21), and the top end of the bearing jig (21) abuts against the bottom surface of the bottom steel tower segment (1) of a plurality of steel tower segments (1) through an adjusting and tightening structure (23); the steel tower vertical pre-assembly device further includes an adjusting jig (22), the upper part of the adjusting jig (22) is composed of a vertical section and a horizontal section in an L-shaped structure, an adjusting jack (25) is placed on the horizontal section, the top end of the vertical section abuts against the bottom surface of the bottom steel tower segment (1) through the adjusting and tightening structure (23), and the end face of the lifting end of the adjusting jack (25) contacts the bottom surface of the bottom steel tower segment (1).

2. The vertical pre-assembly device for steel towers according to claim 1, wherein The steel tower segment (1) is surrounded by four outer wall plates (11), and each adjacent two outer wall plates (11) are connected by a right-angle wall plate (12) bent inwards. A side web (13) and a reinforcing web (14) are respectively spanned between two opposite outer wall plates (11). The reinforcing web (14) is located on the transverse center line of the end face of the steel tower segment (1), and the two side webs (13) are symmetrically located on both sides of the reinforcing web (14) respectively.

3. The vertical pre-assembly device for steel towers according to claim 2, wherein, A plurality of the bearing jigs (21) are respectively arranged on the bottom surfaces of the outer wall plates (11) and the side webs (13), and the plurality of bearing jigs (21) are symmetrically arranged along the transverse center line and the longitudinal center line of the end face of the steel tower segment (1).

4. The vertical pre-assembly device for steel towers according to claim 2, wherein, Adjusting jigs (22) are arranged at the corresponding bottom positions where the two opposite outer wall plates (11) are connected to the side webs (13). There are four adjusting jigs (22), and the four adjusting jigs (22) are symmetrically arranged along the transverse center line and the longitudinal center line of the end face of the steel tower segment (1).

5. The vertical pre-assembly device for steel towers according to claim 1, characterized in that, The side parts of the bearing jig (21) and the adjusting jig (22) are connected by a connecting piece (27), and the connecting piece (27) is an H-shaped steel.

6. The vertical pre-assembly device for steel towers according to claim 1, wherein, The steel tower vertical pre-assembly device further includes a bottom plate, the bottom plate is fixed to the ground, and the bottom surfaces of the bearing jig (21) and the adjusting jig (22) are respectively fixed to the bottom plate.

7. The vertical pre-assembly device for steel towers according to claim 1, wherein, The adjusting and tightening structure (23) is at least a pair of triangular wooden wedges, and the inclined surfaces of a pair of triangular wooden wedges are mutually attached and the bottom surfaces are mutually parallel.

8. The vertical pre-assembly device for steel towers according to claim 1, wherein A backing plate (26) is padded between the adjusting and tightening structure (23) and the bearing jig (21) and the adjusting jig (22).

9. The vertical pre-assembly device for steel towers according to claim 1, characterized in that A groove protection piece (24) is arranged between the outer wall plate of the bottom steel tower segment (1) and the adjusting and tightening structure (23).

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