Bushion beam anti-inclination structure for steel box beam incremental launching construction

Abstract

The utility model discloses a bearing beam anti-inclination structure for steel box beam pushing construction, which comprises a steel box beam pushing auxiliary structure and a protection component, the steel box beam pushing auxiliary structure comprises a longitudinal distribution beam supported by a temporary pier and a bearing beam positioned between the steel box beam and the longitudinal distribution beam, and the bearing beam is supported by the longitudinal distribution beam; the protection assembly comprises a front supporting base, a rear supporting base, a sliding rail and a sliding base, the front supporting base is fixed to the transverse end of the front supporting bearing beam, the rear supporting base is fixed to the transverse end of the rear supporting bearing beam, and the front supporting base and the rear supporting base are connected through the sliding rail. The sliding seat is driven to be arranged on the sliding rail in a sliding mode in the pushing direction parallel to the steel box girder, and the sliding seat is provided with a limiting end for limiting the maximum descending stroke of the pushing bearing beam. The bearing beam can be prevented from overturning, and necessary deviation rectification can be carried out on the bearing beam in cooperation with a jack system.

Description

Technical Field

[0001] The utility model relates to the field of steel structure jacking construction, in particular to a cushion beam anti-tilting structure for steel box beam jacking construction. Background Art

[0002] During the jacking process of the steel box girder, the jack is located above the longitudinal distribution beam, the jack cylinder is placed above the pad, and the pad is placed above the transverse pad. The pad is the main load-bearing component in the jacking process, and has the characteristics of heavy deadweight and long span.

[0003] In the actual jacking process, the cushion beam and the lower cushion block are generally not welded to avoid stress concentration; this creates the risk of the cushion beam being easily displaced or overturned above the cushion block, posing a safety hazard.

[0004] Therefore, in order to solve the above problems, a cushion beam anti-tilt structure for steel box girder jacking construction is needed, which can prevent the cushion beam from overturning and can cooperate with the jack system to perform necessary deviation correction on the cushion beam. Utility Model Content

[0005] In view of this, the purpose of the utility model is to overcome the defects in the prior art and provide a cushion beam anti-tilt structure for steel box girder jacking construction, which can prevent the cushion beam from overturning and can cooperate with the jack system to perform necessary deviation correction on the cushion beam.

[0006] The utility model discloses a cushion beam anti-tilting structure for steel box beam jacking construction, comprising a steel box beam jacking auxiliary structure and a protection component;

[0007] The steel box girder jacking auxiliary structure includes a temporary pier fixed at a preset position, a transverse distribution beam supported by the temporary pier, and a longitudinal distribution beam supported by the transverse distribution beam, and also includes a cushion beam located between the steel box girder to be jacked and the longitudinal distribution beam;

[0008] The cushion beam comprises a top-pushing cushion beam supported by a jack in the longitudinal middle of the longitudinal distribution beam, a front supporting cushion beam arranged at the front side of the top-pushing cushion beam close to the longitudinal front end of the longitudinal distribution beam, and a rear supporting cushion beam arranged at the rear side of the top-pushing cushion beam close to the longitudinal rear end of the longitudinal distribution beam;

[0009] The protection assembly includes a front support seat, a rear support seat, a slide rail and a slide seat. The front support seat is fixed at the lateral end of the front support pad beam, and the rear support seat is fixed at the lateral end of the rear support pad beam. The slide rail connects the front support seat and the rear support seat. The slide seat is driven to slide on the slide rail along the pushing direction parallel to the steel box beam, and the slide seat has a limit end for limiting the maximum downward stroke of the pushing pad beam.

[0010] Furthermore, the steel box girder jacking auxiliary structure also includes a flange column supported by the longitudinal distribution beam, the flange column is composed of a plurality of sections, and the plurality of sections of the flange column are adjusted to support a preset target by increasing or decreasing in height direction; the preset target includes a front support cushion beam and a rear support cushion beam, so that the front support cushion beam and the rear support cushion beam are respectively adjusted to a preset height through their respective corresponding flange column groups;

[0011] The base of the jack is arranged in the longitudinal middle part of the longitudinal distribution beam, and the lifting end of the jack supports the push pad beam.

[0012] Furthermore, it also includes a cushion beam pad, which is divided into a plurality of cushion beam pads. The plurality of cushion beam pads can adjust the cushion layer height by increasing or decreasing the height direction. The cushion beam pads include a cushion beam pad group I for lifting the front support seat on the front support cushion beam, and the cushion beam pads also include a cushion beam pad group II for lifting the rear support seat on the rear support cushion beam.

[0013] Furthermore, a lubricating layer is provided between the slide rail and the slide seat; and the bottom surface of the slide rail is higher than the bottom surface of the steel box beam.

[0014] Furthermore, the slide rail is located at the end of the push pad beam in the length direction, and the protection component is composed of two groups respectively arranged at the two ends of the push pad beam in the length direction.

[0015] Furthermore, the slide rail is cylindrical, and the two ends of the cylinder are respectively connected to the front support seat and the rear support seat. The slide seat includes a sleeve mounted on the cylindrical tube, and the slide seat also includes a hook arranged on the sleeve, and the limit end is located at the end of the hook.

[0016] Furthermore, the hook includes a vertical plate parallel to the vertical direction and a horizontal plate parallel to the horizontal direction, the horizontal plate is connected to the bottom end of the vertical plate, and the vertical plate is connected to the bottom of the sleeve; it also includes a reinforcing plate connecting the horizontal plate and the vertical plate at the bottom of the horizontal plate, and the bottom sections of the reinforcing plate, the horizontal plate and the vertical plate are combined to form a triangular cavity.

[0017] Furthermore, the projection of the vertical plate along the jacking direction of the steel box girder is a cone with a small upper end and a large lower end, and the corresponding two vertical plates in the two oppositely arranged groups of hooks form a limit for the jacking pad beam along the jacking direction of the steel box girder.

[0018] Furthermore, the slide rail is provided with a front stopper and a rear stopper for limiting the displacement distance of the slide seat along the pushing direction of the steel box beam.

[0019] Furthermore, the hooks are arranged in two groups opposite to each other in the width direction of the top push pad beam, and the two groups of hooks extend into the web of the top push pad beam to limit the upper flange of the top push pad beam.

[0020] The present invention also discloses a method for correcting the deviation of a top-pushing cushion beam based on the anti-tilt structure of the cushion beam for top-pushing construction of a steel box beam, including the following correction steps:

[0021] S1. Determine whether the jacking beam is deviated from the jack. If so, correct the beam deviation. If not, continue to push the steel box beam;

[0022] S2. Adjust the jack to lift the top push pad beam;

[0023] S3. A pad group Ⅰ is provided between the front support beam and the front support seat, and a pad group Ⅱ is provided between the rear support beam and the rear support seat;

[0024] The cushion layer height of the beam cushion block group I is consistent with the cushion layer height of the beam cushion block group II;

[0025] S4. Adjust the jack to descend so that the lifting end of the jack and the jacking pad beam are separated;

[0026] S5. Adjust the displacement of the jack so that the lifting end of the jack is directly below the bottom of the support beam;

[0027] S6. Adjust the jack to lift the jack so that the jack can support the jacking beam;

[0028] S7. Remove the beam pad group Ⅰ and beam pad group Ⅱ added in step S3;

[0029] S8. Adjust the jack down so that the front support seat is supported by the front support cushion beam and the rear support seat is supported by the rear support cushion beam;

[0030] S9. Continue to push the steel box girder.

[0031] The beneficial effects of the utility model are as follows: the utility model discloses a bolster anti-tilt structure for steel box girder jacking construction, which enables the jacking bolster to be used continuously with protection through the setting of a protective component; the jacking bolster can be continuously in an effective supporting state for the steel box girder, the construction safety can be greatly improved, and the use of the protective component can play a preventive protective function for the jacking bolster to prevent the jacking bolster from overturning, thereby ensuring the safety and quality of construction; at the same time, the method can timely and effectively correct the deviation of the jacking bolster, prevent the accumulation of errors under continuous jacking, and improve the jacking construction quality and construction efficiency of the steel box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0033] Figure 1 This is a schematic diagram of the structure of the protective assembly of the utility model used on the cushion beam;

[0034] Figure 2It is a structural schematic diagram of the connection of the temporary pier, the transverse distribution beam and the longitudinal distribution beam of the utility model;

[0035] Figure 3 This is a structural schematic diagram of the beam pad block of the utility model;

[0036] Figure 4 For this utility model Figure 3 Schematic diagram of the bottom structure;

[0037] Figure 5 This is a structural schematic diagram of the jack protection pad of the utility model;

[0038] Figure 6 For this utility model Figure 5 Schematic diagram of the main structure;

[0039] Figure 7 For this utility model Figure 6 Schematic diagram of the structure in the middle AA direction;

[0040] Figure 8 For this utility model Figure 1 A schematic diagram of a top view structure;

[0041] Fig. 9 For this utility model Figure 1 Schematic diagram of the main structure;

[0042] Fig.10 This is a schematic diagram of the structure of the utility model in which the top push pad beam is offset;

[0043] Fig.11 It is a structural schematic diagram of the utility model for correcting and inserting the beam pad block group I and the beam pad block group II;

[0044] Fig.12 It is a structural schematic diagram of the utility model in which the jack is reset to the position directly below the top push pad beam;

[0045] Fig.13 It is a structural schematic diagram of the utility model for resetting the top-pushing pad beam. DETAILED DESCRIPTION

[0046] Figure 1 It is a schematic diagram of the structure of the utility model. As shown in the figure, the transverse direction is the direction in which the steel box beam crosses the road, and the longitudinal direction is the direction in which the steel box beam is pushed. The cushion beam anti-tilt structure for the steel box beam push construction in this embodiment includes a steel box beam push auxiliary structure and a protection component 11;

[0047] The steel box girder jacking auxiliary structure includes a temporary pier 1 fixed at a preset position, a transverse distribution beam 2 supported by the temporary pier 1, and a longitudinal distribution beam 3 supported by the transverse distribution beam 2;

[0048] It should be understood that the temporary pier 1 is a number of beams distributed in the transverse and longitudinal directions, the transverse distribution beam 2 is supported by a number of temporary piers 1 parallel to the transverse direction, and the transverse distribution beam 2 is a number of beams arranged at intervals in the longitudinal direction, and the longitudinal distribution beam 3 is a number of beams arranged at intervals in the transverse direction for ensuring the support reliability and uniformity of the jacking jack 6, and ensuring the reliability and stability of the steel box girder jacking construction, the steel box girder of this scheme is not shown, and the longitudinal distribution beam 3 is located in the transverse middle part of the transverse distribution beam 2 and is supported by the transverse distribution beam 2, or the longitudinal distribution beam 3 is located directly above the top of the temporary pier 1 and is supported by the transverse distribution beam 2; the structure and position layout of the temporary pier 1, the transverse distribution beam 2 and the longitudinal distribution beam 3 shall be subject to the actual construction layout and will not be repeated here.

[0049] This scheme takes a set of local support structures as an example, such as Figure 2 As shown, the four temporary piers 1 are distributed in a rectangular lattice, the four temporary piers 1 are fixed at preset positions, and are circumferentially connected by trusses 4 to form a supporting body, the trusses 4 connecting the four temporary piers 1 are arranged upward in the height direction, so as to improve the reliability of the supporting structure, the two transverse distribution beams 2 parallel to the transverse direction are respectively supported by the two transversely adjacent temporary piers 1, the longitudinal distribution beam 3 parallel to the longitudinal direction is located in the transverse middle part of the transverse distribution beam 2 and is supported by the two transverse distribution beams 2, so as to improve the structural stability and meet the requirements of the jacking of the steel box girder.

[0050] The steel box girder jacking auxiliary structure also includes a cushion beam located between the steel box girder to be jacked and the longitudinal distribution beam 3, and the cushion beam is supported by a plurality of longitudinal distribution beams 3 in parallel with the transverse direction;

[0051] The cushion beam includes a pushing cushion beam 5 supported by a jack 6 in the longitudinal middle part of the longitudinal distribution beam 3, a front supporting cushion beam 7 arranged at the front side of the pushing cushion beam 5 near the longitudinal front end of the longitudinal distribution beam 3, and a rear supporting cushion beam 8 arranged at the rear side of the pushing cushion beam 5 near the longitudinal rear end of the longitudinal distribution beam 3; more specifically, the front supporting cushion beam 7 is slightly forward in the longitudinal direction compared with the transverse distribution beam 2 arranged at the front side of the bottom thereof to support the longitudinal distribution beam 3, and the rear supporting cushion beam 8 is slightly backward in the longitudinal direction compared with the transverse distribution beam 2 arranged at the rear side of the bottom thereof to support the longitudinal distribution beam 3, which not only expands the longitudinal width of the supporting steel box beam, but also improves the reliability of the bottom supporting structure supporting the top supporting structure, greatly disperses the downward force transmission of the steel box beam, and improves the safety of the steel box beam pushing construction; the front is the longitudinal steel box beam pushing advancing direction, and the rear is opposite to the front in the longitudinal direction; the jack 6 selects any one of the jacks 6 for steel box beam pushing, which is suitable for achieving the purpose of steel box beam pushing construction, and will not be repeated here.

[0052] The steel box girder jacking auxiliary structure also includes a flange column 9 supported by the longitudinal distribution beam 3, and the flange column 9 is composed of several sections, and the flange columns 9 of several sections are adjusted to support the preset target by increasing or decreasing in the height direction; the present scheme makes the flange column 9 into a standard section with a moderate section height, improves the effectiveness and convenience of component turnover, and reduces the construction cost; the height of one section of the flange column 9 does not exceed the height of any of the transverse distribution beam 2, the longitudinal distribution beam 3, the jacking pad beam 5, the front support pad beam 7 and the rear support pad beam 8, thereby avoiding the modification of the size of the distribution beam and the pad beam, and reducing the construction cost;

[0053] The addition or reduction of flange columns 9 on the same axis forms a group of flange columns. Adjacent flange columns 9 in a group are fixed by bolts. The preset target support height can be adjusted by the flange column group without changing the standard pier segment height or adding auxiliary piers of corresponding height to the standard segment piers. This can better meet the versatility of the overall support structure of this scheme, especially when the construction site is close, which can greatly reduce the construction cost. The structure of not directly increasing the height of the auxiliary piers also reduces the support height of the piers in the lower support structure, and the lower support structure can be more stable. The transverse distribution beam 2 and the longitudinal distribution beam 3 separate the columnar pier structure, which can further enhance the stability of the steel box girder support, reduce the deformation of the weak stress area caused by the large stress at the top and the small stress at the bottom of the pier, and enhance construction safety.

[0054] The preset target includes the front support pad beam 7 and the rear support pad beam 8, so that the front support pad beam 7 and the rear support pad beam 8 are respectively adjusted to the preset height through their corresponding flange column groups; the front support pad beam 7 and the rear support pad beam 8 can be temporarily and flexibly adjusted to the preset height through their corresponding flange column groups to meet the construction requirements. Of course, the corresponding flange column group can also be arranged at the bottom of the jacking pad beam to achieve the function of lifting the jack position, which will not be repeated here.

[0055] The base of the jack 6 is arranged in the longitudinal middle of the longitudinal distribution beam, and the lifting end of the jack 6 supports the push pad beam 5;

[0056] More specifically, the front support cushion beam 7 is supported by the flange column group I at the longitudinal front end of the longitudinal distribution beam 3; the rear support cushion beam 8 is supported by the flange column group II at the longitudinal rear end of the longitudinal distribution beam 3;

[0057] The front support cushion beam 7 and the rear support cushion beam 8 have the same height, and the jack 6 is supported by the longitudinal distribution beam to a preset height, so as to meet the shorter lifting stroke of the jack 6 and meet the stability requirement of the jack 6 pushing the steel box beam through the jacking cushion beam 5;

[0058] The use of flange column groups can solve the problem of insufficient support height of elevation segment piers. At the same time, there is no need to adjust the height of the distribution beam and the cushion beam, and it can flexibly meet the support requirements of the steel box girder with a preset height. All components used for the jacking support of the entire steel box girder can be used in a turnover manner, reducing construction costs and improving construction quality.

[0059] The protection assembly 11 includes a front support seat 1101, a rear support seat 1102, a slide rail 1103 and a slide seat 1104, the front support seat 1101 is fixed at the lateral end of the front support cushion beam, the rear support seat 1102 is fixed at the lateral end of the rear support cushion beam, the front support seat 1101 and the rear support seat 1102 are located on the same lateral side of the steel box beam, the slide rail 1103 connects the front support seat 1101 and the rear support seat 1102, the slide seat 1104 is driven to slide along the pushing direction parallel to the steel box beam and is set on the slide rail 1103, the slide seat 1104 has a limit end 1105 for limiting the maximum downward stroke of the pushing cushion beam; so that the pushing cushion beam is in a continuously protected state to push the steel box beam, prevent the pushing cushion beam from overturning, and can cooperate with the jack system to perform necessary correction on the cushion beam, thereby improving the quality and efficiency of the steel box beam pushing construction;

[0060] It also includes a cushion beam pad 10, wherein the cushion beam pad 10 is composed of a plurality of pieces, and the cushion layer height can be adjusted by increasing or decreasing the plurality of cushion beam pads 10 in the height direction;

[0061] The thickness of one of the cushion beam pads 10 is not greater than the height of one section of the flange column 9;

[0062] The addition or reduction of the cushion beams and cushion blocks 10 on the same axis forms a group of cushion beam and cushion block groups, and the cushion beam and cushion block groups are used to make the bottom surface of the front support seat 1101 or the bottom surface of the rear support seat 1102 supported by the corresponding cushion beam and cushion block groups.

[0063] That is to say, during the process of pushing the shim to correct the deviation, the preset lifting distance of the shim is the use height of a group of shim pad blocks. The use of the shim pad blocks 10 can make up for the lifting height of the front supporting shim and the rear supporting shim, and the shim pad blocks 10 are flexible to use and easy to arrange, which greatly improves the progress and quality of the shim correction, can meet the support effectiveness of the shim to the front support seat 1101 and the rear support seat 1102, and improves construction safety. At the same time, it overcomes the problem of large amount of steel plates and the trouble of stacking or unloading, and the construction cost is effectively controlled.

[0064] It also includes the method of correcting the deviation of the jacking beam:

[0065] S1. Determine whether the jacking beam 5 deviates from the jack 6. If so, correct the jacking beam 5. Otherwise, continue to push the steel box beam;

[0066] S2. Adjust the jack to lift the top push pad beam;

[0067] S3. A pad group Ⅰ is provided between the front support beam and the front support seat 1101, and a pad group Ⅱ is provided between the rear support beam and the rear support seat 1102;

[0068] The cushion layer height of the beam pad group I is consistent with the cushion layer height of the beam pad group II, that is, the number of beam pads in the beam pad group I is consistent with the number of beam pads in the beam pad group II. More precisely, the number of beam pads in the beam pad group I is generally no more than three. This solution is one beam pad. The fewer beam pads are used, the more the safety of the structure can be guaranteed. At the same time, it is convenient to stack and the force is reliable, which can improve the safety of the operation.

[0069] S4. Adjust the jack to descend so that the lifting end of the jack and the jacking pad beam are separated;

[0070] S5. Adjust the displacement of the jack so that the lifting end of the jack is directly below the bottom of the support beam;

[0071] S6. Adjust the jack to lift the jack so that the jack can support the jacking beam;

[0072] S7. Remove the beam pad group Ⅰ and beam pad group Ⅱ added in step S3;

[0073] S8. Adjust the jack down so that the front support seat 1101 is supported by the front support pad beam and the rear support seat 1102 is supported by the rear support pad beam;

[0074] S9. Continue to push the steel box girder.

[0075] By adopting the above-mentioned jacking pad beam construction method, the jacking pad beam can be continuously in an effective supporting state for the steel box girder, the construction safety can be greatly improved, and the use of the protective component 11 can play a preventive protection function for the jacking pad beam to prevent the jacking pad beam from overturning, thereby ensuring the safety and quality of construction; at the same time, the method can timely and effectively correct the jacking pad beam, prevent the accumulation of errors under continuous jacking, and improve the jacking construction quality and construction efficiency of the steel box girder.

[0076] In this embodiment, there is a lubricating layer between the slide rail 1103 and the slide seat 1104. The lubricating layer is polytetrafluoroethylene coated on the inner side of the slide seat 1104; the relative displacement of the slide rail 1103 and the slide seat 1104 is smooth, which does not affect the jacking construction of the steel box girder, and can improve the efficiency of the jacking beam correction and the jacking efficiency of the steel box girder.

[0077] In this embodiment, the slide rail 1103 is located at the end of the top push pad beam in the length direction, and the protection assembly 11 is respectively arranged in two groups at the two ends of the top push pad beam in the length direction. It can improve the protection without affecting the top push construction of the steel box beam, and the two groups of the protection assembly 11 can independently correct the top push pad beam, and the correction efficiency is higher. The setting position of the protection assembly 11 is preferably not to affect the top push construction position of the steel box beam, and it will not be repeated here.

[0078] In this embodiment, the bottom surface of the slide rail 1103 is higher than the bottom surface of the steel box beam, so that the protection component 11 does not affect the jacking construction of the steel box beam; that is, the steel box beam will not be jacked to the position of the slide rail 1103 during the jacking process, thereby improving the construction safety.

[0079] In this embodiment, the slide rail 1103 is cylindrical, and the two ends of the cylinder are respectively connected to the front support seat 1101 and the rear support seat 1102. The slide seat 1104 includes a sleeve sleeved on the cylindrical tube, and the slide seat 1104 also includes a hook provided on the sleeve, and the end of the hook forms a limit end 1105. The cylindrical slide rail 1103 and the slide seat 1104 of the sleeve structure are easy to obtain materials, simple to manufacture, and can save construction costs.

[0080] In this embodiment, the bottom of the front support seat 1101 is provided with front reinforcing ribs, and the front support seat 1101 is a square steel tube. The front reinforcing ribs are a number of ribs uniformly distributed around the front support seat 1101, which can improve the supporting reliability of the front support seat 1101 on the front supporting pad beam and improve the protection capability of the top pushing pad beam; the bottom of the rear support seat 1102 is provided with rear reinforcing ribs, and the rear support seat 1102 is a square steel tube. The rear reinforcing ribs are a number of ribs uniformly distributed around the rear support seat 1102, which can improve the supporting reliability of the rear support seat 1102 on the front supporting pad beam and improve the protection capability of the top pushing pad beam; the sliding rail 1103 is roughly connected to the middle of the front support seat 1101 in the height direction and the middle of the rear support seat 1102 in the height direction, so as to further improve the structural safety.

[0081] In this embodiment, the hooks are two groups arranged opposite to each other in the width direction of the top pushing pad beam, and the two groups of hooks extend into the web of the top pushing pad beam. The hooks are used to limit the upper flange of the top pushing pad beam. As shown in the figure, the top pushing pad beam is limited by the slide 1104 in an inserted manner, and the insertion direction is perpendicular to the pushing direction of the top pushing pad beam, thereby improving the structural reliability and reducing stress transfer. The protection of the upper flange of the top pushing pad beam formed by the hooks further ensures the reliability of the protection of the slide 1104 on the top pushing pad beam.

[0082] In this embodiment, the hook includes a vertical plate 111 parallel to the vertical direction and a horizontal plate 112 parallel to the horizontal direction, the horizontal plate 112 is connected to the bottom end of the vertical plate 111, and the vertical plate 111 is connected to the bottom of the sleeve, and the projection of the vertical plate 111 along the top-pushing direction of the steel box girder is a cone-shaped structure with a small upper end and a large bottom end to enhance the protection capability, and has a better fall-proof structure to prevent the hook end from breaking and failing under large stress, thereby improving construction safety; it also includes a reinforcing plate 113 connecting the horizontal plate 112 and the vertical plate 111 at the bottom of the horizontal plate 112, and the bottom sections of the reinforcing plate 113, the horizontal plate 112 and the vertical plate 111 are surrounded to form a triangular cavity, which further ensures the structural strength of the hook and meets the preset use requirements; further, the corresponding two vertical plates 111 in the two oppositely arranged groups of hooks also form a limit for the top-pushing pad beam along the top-pushing direction of the steel box girder, thereby improving the reliability of the use of the top-pushing pad beam and preventing the displacement of the top-pushing pad beam in the top-pushing direction of the steel box girder as much as possible.

[0083] In this embodiment, the slide rail 1103 has a front stopper 1106 and a rear stopper 1107 for limiting the displacement distance of the slide seat 1104 along the top-pushing direction of the steel box beam. The front stopper 1106 is in the shape of a disk mounted on the slide rail 1103, and a front reinforcement rib is arranged on the front side of the front stopper 1106. The front reinforcement rib is a plurality of pieces uniformly distributed in the radial direction of the slide rail 1103 to fix the front stopper 1106; the rear stopper 1107 is in the shape of a disk mounted on the slide rail 1103, and a rear reinforcement rib is arranged on the rear side of the rear stopper 1107. The rear reinforcement rib is a plurality of pieces uniformly distributed in the radial direction of the slide rail 1103 to fix the rear stopper 1107. The front stopper 1106 and the rear stopper 1107 are used to limit the travel of the slide seat 1104 along the top-pushing direction of the steel box beam, improve the protection effect of the top-pushing pad beam, and prevent the top-pushing pad beam from over-tilting, thereby playing a safety protection function.

[0084] In this embodiment, the beam pad 10 includes a top plate 101 and a plurality of supporting ribs 102 vertically connected to the bottom surface of the top plate 101. On the one hand, the use height of the beam pad 10 is increased, thereby replacing the stacked steel plates of the same height. On the other hand, the vertical method can ensure that the structural strength of the beam pad 10 meets the construction requirements, and the stacking and unloading are convenient. At the same height, only one beam pad 10 is needed to replace the stacking of multiple steel plates, which is lighter in weight, more efficient in construction, and the construction cost can be controlled in a lower range.

[0085] A number of the supporting ribs 102 divide the bottom of the top plate 101 into a number of force distribution areas, and a number of the force distribution areas converge toward the center of the horizontal plane of the top plate 101 to improve the support reliability. The horizontal plane is perpendicular to the vertical direction, and in this solution, the top plate 101 is a rectangular plate, and a number of the supporting ribs 102 are connected to the bottom surface of the top plate 101 in a mutually perpendicular manner, that is, the supporting ribs 102 are mutually perpendicular to form a "well"-shaped structure, and the mutually perpendicular supporting ribs 102 are also perpendicular to the edges of the rectangular plates on the corresponding sides; combined with the technical feature that the top plate 101 is perpendicular to the supporting ribs 102, each force distribution area is a rectangular cavity, which further improves the structural reliability and force transmission stability of the pad beam and pad block 10, and meets the support requirements for the steel box girder.

[0086] In this embodiment, a jack protection pad 12 supported by the top surface of the jack lifting end is also included. The jack protection pad 12 includes a support cushion layer supported by the top surface of the jack lifting end and a limiting limb 124 for limiting the jack lifting end. The use of the jack protection pad 12 can increase the force application area of ​​the jack lifting end, disperse the load transmitted by the steel box girder, and improve the safety of the steel box girder jacking construction;

[0087] The support cushion layer is located between the top surface of the lifting end of the jack and the bottom surface of the top push pad beam 5, and the limiting limbs 124 are connected to the bottom surface of the support cushion layer. The limiting limbs 124 are a plurality of pieces uniformly distributed circumferentially at the lifting end of the jack. The arrangement of the limiting limbs 124 further improves the support effectiveness and reliability of the jack 6 on the steel box beam, and can prevent the displacement of the jack protection pad 12, thereby improving the construction safety.

[0088] In this embodiment, the support pad layer includes an upper pad 121, a lower pad 122 and a connecting rib 123. The upper pad 121 and the lower pad 122 are parallel, and the connecting rib 123 vertically connects the upper pad 121 and the lower pad 122 to improve the reliability of the structure; the upper pad 121 and the lower pad 122 have the same structure, and in the vertical projection, the upper pad 121 and the lower pad 122 overlap and are connected by the connecting rib 123; the connecting rib 123 is a plurality of pieces, and the plurality of connecting ribs 123 are connected between the upper pad 121 and the lower pad 122 in a mutually perpendicular manner; the reliability of the structure and the uniformity of force transmission are improved;

[0089] More specifically, the upper pad 121 and the lower pad 122 are rectangular plates with the same structure, and a plurality of mutually perpendicular connecting ribs 123 divide the area between the upper pad 121 and the lower pad 122 into a plurality of force transmission cavities of approximately equal size, further improving the structural reliability and force transmission stability of the jack protection pad 12, and meeting the stable and reliable support requirements for the top push pad beam 5;

[0090] The thickness of the connecting ribs 123 parallel to the length direction of the lower pad 122 is 1.8 to 2.2 times the thickness of the connecting ribs 123 perpendicular to the length direction of the lower pad 122. In this scheme, the thickness of the connecting ribs 123 parallel to the length direction of the lower pad 122 is twice the thickness of the connecting ribs 123 perpendicular to the length direction of the lower pad 122, so that the dimensions of the force transmission chambers are approximately the same, with only a small size difference; when the jack protection pad 12 is in use, the thicker connecting ribs 123 are parallel to the horizontal arrangement, and the thicker connecting ribs 123 can provide stronger rigid support for the jacking pad beam 5, thereby ensuring the reliability and effectiveness of the use of the jack protection pad block 12, and the jack 6 can provide more reliable force conditions for the jacking pad beam 5 through the jack protection pad block 12.

[0091] In this embodiment, the supporting cushion layer also includes a reinforcing rib 125 arranged near the center of the horizontal plane of the lower pad 122; the reinforcing rib 125 is perpendicular to the length direction of the lower pad 122, and the top and bottom ends of the reinforcing rib 125 along the width direction of the lower pad 122 are respectively connected to the connecting rib 123 close thereto; the reinforcing rib 125 is composed of a plurality of pieces, and the plurality of pieces of the reinforcing rib 125 are arranged at intervals along the length direction of the lower pad 122, and the projections of the plurality of pieces of the reinforcing rib 125 in the length direction of the lower pad 122 overlap; the use of the reinforcing rib 125 in the jack protection pad 12 can further enhance the protection of the lifting end of the jack, and ensure the reliability and effectiveness of the use of the jack protection pad 12. At the same time, since the structure there is at a node with strong force, it is more necessary to make reliable structural reinforcement there to enhance the structural strength, meet construction requirements, and enhance construction safety.

[0092] More specifically, in the present embodiment, the connecting ribs 123 parallel to the length direction of the lower pad 122 are two symmetrically distributed in the upper and lower parts of the horizontal center of the lower pad 122, and the connecting ribs 123 perpendicular to the length direction of the lower pad 122 are four symmetrically distributed in the left and right parts of the horizontal center of the lower pad 122; the reinforcing ribs 125 are three pieces correspondingly connected in the force transmission cavity distributed near the horizontal center of the lower pad 122, and the three reinforcing ribs 125 are distributed in sequence and connected in the middle of the corresponding force transmission cavity.

[0093] In this embodiment, the bottom surface of the lower pad 122 is parallel to the horizontal plane, the top surface of the lower pad 122 is supported by the top surface of the lifting end of the jack 6, and the top surface of the upper pad 121 supports the bottom surface of the jacking pad beam 5. The center of the horizontal surface of the supporting pad layer coincides with the lifting center of the lifting end of the jack in the vertical direction; the safety of the jacking construction process is improved, and at the same time, the force applied by the jack 6 can be completely converted into effective lifting force, thereby improving the construction quality.

[0094] In this embodiment, the limiting limb 124 is vertically connected to the bottom surface of the lower pad 122; the clockwise connecting line dimension of the inner edge of the limiting limb 124 is consistent with the radial dimension of the lifting end of the jack 6, thereby improving the reliability of the use of the jack 6 and the stability of the force application, and preventing construction safety problems caused by the change of the lifting position of the jack 6; the width direction of the lower pad 122 is slightly larger than the radial dimension of the lifting end of the jack 6, and the limiting limb 124 is four pieces correspondingly distributed at the four corners of the lower pad 122, and the corresponding extension lines of the four limiting limbs 124 pass through the horizontal center of the lower pad 122, further improving the reliability of the use of the jack 6 and the stability of the force application.

[0095] In this embodiment, the flange column 9, the beam pad 10 and the jack protection pad 12 are all steel structures, which improve the support reliability while having better rigidity and longer service life, facilitating turnover and reducing construction costs.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cushion beam anti-tilt structure for steel box beam jacking construction, characterized in that: Including steel box girder jacking auxiliary structure and protection components; The steel box girder jacking auxiliary structure includes a temporary pier fixed at a preset position, a transverse distribution beam supported by the temporary pier, and a longitudinal distribution beam supported by the transverse distribution beam, and also includes a cushion beam located between the steel box girder to be jacked and the longitudinal distribution beam; The cushion beam comprises a top-pushing cushion beam supported by a jack in the longitudinal middle of the longitudinal distribution beam, a front supporting cushion beam arranged at the front side of the top-pushing cushion beam close to the longitudinal front end of the longitudinal distribution beam, and a rear supporting cushion beam arranged at the rear side of the top-pushing cushion beam close to the longitudinal rear end of the longitudinal distribution beam; The protection assembly includes a front support seat, a rear support seat, a slide rail and a slide seat. The front support seat is fixed at the lateral end of the front support pad beam, and the rear support seat is fixed at the lateral end of the rear support pad beam. The slide rail connects the front support seat and the rear support seat. The slide seat is driven to slide on the slide rail along the pushing direction parallel to the steel box beam, and the slide seat has a limit end for limiting the maximum downward stroke of the pushing pad beam.

2. The anti-tilt structure of the cushion beam for top-pushing construction of a steel box beam according to claim 1 is characterized in that: The steel box girder jacking auxiliary structure also includes a flange column supported by a longitudinal distribution beam, the flange column is composed of a plurality of sections, and the plurality of sections of the flange column are adjusted to support a preset target by increasing or decreasing in height direction; the preset target includes a front support cushion beam and a rear support cushion beam, so that the front support cushion beam and the rear support cushion beam are respectively adjusted to a preset height through their respective corresponding flange column groups; The base of the jack is arranged in the longitudinal middle part of the longitudinal distribution beam, and the lifting end of the jack supports the push pad beam.

3. The anti-tilt structure of the cushion beam for steel box girder jacking construction according to claim 1 is characterized in that: It also includes a plurality of beam pads, which can adjust the pad height by increasing or decreasing the height direction. The beam pads include a beam pad group I for lifting the front support seat on the front support beam, and the beam pads also include a beam pad group II for lifting the rear support seat on the rear support beam.

4. The anti-tilt structure of the cushion beam for top-pushing construction of a steel box beam according to claim 1 is characterized in that: A lubricating layer is provided between the slide rail and the slide seat; and the bottom surface of the slide rail is higher than the bottom surface of the steel box beam.

5. The cushion beam anti-tilt structure for steel box girder jacking construction according to claim 4 is characterized in that: The slide rail is located at the end of the push pad beam in the length direction, and the protection component is composed of two groups respectively arranged at the two ends of the push pad beam in the length direction.

6. The cushion beam anti-tilt structure for steel box beam jacking construction according to claim 1 is characterized in that: The slide rail is cylindrical, and the two ends of the cylinder are respectively connected to the front support seat and the rear support seat. The slide seat includes a sleeve mounted on the cylindrical tube, and the slide seat also includes a hook arranged on the sleeve, and the limit end is located at the end of the hook.

7. The cushion beam anti-tilt structure for steel box girder jacking construction according to claim 6 is characterized by: The hook includes a vertical plate parallel to the vertical direction and a horizontal plate parallel to the horizontal direction, the horizontal plate is connected to the bottom end of the vertical plate, and the vertical plate is connected to the bottom of the sleeve; it also includes a reinforcing plate connecting the horizontal plate and the vertical plate at the bottom of the horizontal plate, and the bottom sections of the reinforcing plate, the horizontal plate and the vertical plate are enclosed to form a triangular cavity.

8. The cushion beam anti-tilt structure for steel box beam jacking construction according to claim 7 is characterized in that: The projection of the vertical plate along the top-pushing direction of the steel box girder is in the shape of a cone with a small upper end and a large lower end. The corresponding two vertical plates in the two oppositely arranged groups of hooks form a limit for the top-pushing cushion beam along the top-pushing direction of the steel box girder.

9. The cushion beam anti-tilt structure for steel box beam jacking construction according to claim 1 is characterized in that: The slide rail is provided with a front stopper and a rear stopper for limiting the displacement distance of the slide seat along the pushing direction of the steel box beam.

10. The cushion beam anti-tilt structure for steel box beam jacking construction according to claim 6, characterized in that: The hooks are arranged in two groups opposite to each other in the width direction of the top push pad beam. The two groups of hooks extend into the web of the top push pad beam to limit the upper flange of the top push pad beam.

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