Steel cross beam mounting device and construction method thereof

Abstract

The invention discloses a steel cross beam mounting device and a construction method thereof, a steel cross beam is connected with a walking system of an adjusting device, and a plurality of groups of supports are mounted at the bottom of the steel cross beam at intervals. The steel cross beam and the adjusting device are installed on the top of the cover beam, and a lifting mechanism of the adjusting device is supported on the cover beam. The lifting device lifts to adjust the elevation of the steel cross beam, and the walking system walks on the bearing frame to adjust the longitudinal bridge direction position of the steel cross beam. And after the steel cross beam is adjusted in place, the support cushion stone is poured between the cover beam and the support through the cushion stone template. According to the steel cross beam mounting device and the construction method thereof, the steel cross beam is mounted firstly, then the padstones are constructed downwards, the thickness of each padstone does not need to be calculated, accumulated construction errors from bottom to top can be systematically eliminated, the construction efficiency is improved, and meanwhile the construction errors are reduced.

Description

Technical Field

[0001] This invention relates to the field of bridge reinforcement and renovation technology, specifically to a steel beam installation device and its construction method. Background Technology

[0002] In the demolition and reconstruction of the bridge deck system of a continuous arch bridge, a new composite beam structure is adopted to replace the traditional flat hollow beam. The new composite beam structure generally consists of a lower I-beam and an upper reinforced concrete bridge deck, connected by shear studs. It is prefabricated as a whole in advance. Before the reconstruction, it was a simply supported hollow slab beam, and after the reconstruction, it is a continuous composite beam structure. This scientifically reduces the load on the old bridge while significantly improving the integrity of the bridge deck system.

[0003] When installing composite beams, the steel crossbeams are installed first. After the steel crossbeams are installed on the support pads and secured, the prefabricated composite beams are welded to the steel crossbeams. Currently, for the installation of steel crossbeams, the elevation of the cap beam is generally measured first, then the height of the pad is calculated based on the theoretical elevation of the pad, the pad is then constructed, and after the pad strength meets the design requirements, the crossbeams are installed and fixed measures are taken for the crossbeams.

[0004] However, due to the often poor construction precision of old bridge cap beams, which differ from the as-built drawings of the old bridge, the cross slope of each cap beam is also different, and there are deviations in the plan view. Therefore, it is necessary to first measure the elevation and plan position of each old bridge cap beam, then control the elevation according to the bearing pad theory, calculate the height of each bearing pad, and then construct the bearing pads. After the bearing pads have reached the design strength, the steel crossbeams are installed. During the installation of the steel crossbeams, because there is a deviation between the actual span and the theoretical span of the old bridge, the longitudinal position of the crossbeams in the cap beams must be adjusted after installation. The adjustment is carried out by suspending the crossbeams in the air with a crane. Therefore, the traditional construction method of steel crossbeams is inefficient and prone to errors. Summary of the Invention

[0005] Therefore, it is necessary to provide a steel beam installation device and its construction method to address the problems of low construction efficiency and large errors in traditional steel beam construction methods.

[0006] A steel beam mounting device, comprising: Multiple sets of supports, wherein the multiple sets of supports are arranged at intervals at the bottom of the steel beam; The adjustment device includes a lifting mechanism, a support frame, and a traveling system. The lifting mechanism is arranged on the cap beam and connected to the support frame. The traveling system is installed on the support frame and is used to suspend the steel crossbeam. The lifting mechanism is used to adjust the elevation of the steel crossbeam, and the traveling system's movement on the support frame is used to adjust the longitudinal position of the steel crossbeam. A bearing pad template is placed in the gap between the cap beam and the support. The bearing pad template is used to cast bearing pads between the cap beam and the support.

[0007] In one embodiment, the support is connected to the bottom of the steel beam via a first leveling member.

[0008] In one embodiment, the support frame includes two uprights and a crossbar, the bottom of the uprights being optionally fixed to the cap beam, the two ends of the crossbar being connected to the tops of the two uprights, and the walking system being mounted on the crossbar.

[0009] In one embodiment, the steel beam is arranged in the doorway of the support frame, and a second leveling component is arranged in the gap between the steel beam and the crossbar.

[0010] In one embodiment, the walking system includes a sliding trolley and a bracket, the rollers of the sliding trolley are arranged on the support frame, one end of the bracket is connected to the sliding trolley, and the other end of the bracket is connected to the steel crossbeam.

[0011] In one embodiment, the pad stone template includes a first template and a second template, which are nested together, and the relative displacement of the first template and the second template is used to adjust the height of the pad stone template.

[0012] A construction method for a steel beam, utilizing the steel beam installation device described in any one of the above claims, includes the following steps: Connect the steel crossbeam to the travel system of the adjustment device, and install multiple sets of supports at intervals at the bottom of the steel crossbeam; The steel crossbeam, together with the adjusting device, is installed on the top of the cover beam, and the lifting mechanism of the adjusting device is supported on the cover beam. The lifting device is used to raise and lower the steel crossbeam to adjust its elevation, and the traveling system is used to travel on the support frame to adjust the longitudinal bridge position of the steel crossbeam. After the steel beam is adjusted into place, the support pad stone is poured between the cap beam and the support through the pad stone template.

[0013] In one embodiment, the step of installing the steel beam together with the adjusting device onto the top of the cap beam further includes: The concrete cap beam of the old bridge was cleaned and roughened, and the plane position and elevation of the bearing pads on both sides of the cap beam were measured.

[0014] In one embodiment, the step of installing the steel crossbeam together with the adjusting device onto the top of the cover beam specifically involves: The steel crossbeam is hoisted by a crane and installed on top of the cap beam along with the adjustment device, and the transverse position of the steel crossbeam is adjusted during the installation process.

[0015] In one embodiment, after the support pad stone is cast between the cap beam and the support using the pad stone template, the adjustment device is not removed temporarily and is used as a temporary fixing device during the installation of the composite beam.

[0016] The above-mentioned steel beam installation device and its construction method have at least the following advantages: 1. The traditional steel beam construction method involves first constructing the pad stones, and then installing and adjusting the steel beams. This technical solution involves first installing the steel beams and then constructing the pad stones downwards. There is no need to calculate the thickness of each pad stone, which can eliminate the cumulative error from bottom to top construction in the system, improving construction efficiency while reducing construction errors.

[0017] 2. The elevation of the steel crossbeam can be adjusted by the lifting mechanism, and the longitudinal position of the steel crossbeam can be adjusted by the walking system. Precise adjustment can be achieved. Compared with the traditional method of measuring the elevation of each cap beam and calculating the thickness of the pad stone one by one, it is only necessary to control the top elevation of the side crossbeams on both sides of the cap beam. The construction is simple, convenient and efficient.

[0018] 3. The adjustment device and support are connected to the steel crossbeam in advance, which does not occupy the critical path and saves construction time.

[0019] 4. The adjustment device can be used as a temporary support for the steel beam, eliminating the need for additional temporary supports, simplifying the construction process of the steel beam and composite beam, and ensuring safe and reliable construction. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is an elevation view of the steel beam mounting device in one embodiment; Figure 2 for Figure 1 Top view of the steel beam mounting device shown; Figure 3 for Figure 1 A magnified view of a section at point A in the middle; Figure 4 for Figure 1 A schematic diagram of the adjustment device. Figure 5 A schematic diagram showing the placement of the pad stone formwork between the support and the cap beam; Figure 6 A schematic diagram for casting the bearing pad stone; Figure 7 for Figure 5 Top view of the intermediate pad stone formwork; Figure 8 for Figure 7 A cross-sectional view of the foundation stone template shown; Figure 9 This is a flowchart of a steel beam construction method in one embodiment; Figure 10 A schematic diagram illustrating the construction of a composite beam on a steel crossbeam.

[0022] Figure label: 1-Steel crossbeam, 2-Cap beam, 10-Support, 11-First leveling component, 20-Adjusting device, 21-Lifting mechanism, 22-Bearing frame, 221-Column, 222-Horizontal bar, 223-Anchor bolt, 23-Traveling system, 231-Sliding trolley, 232-Hanger, 233-Roller, 234-Hook, 24-Top block, 25-Second leveling component, 30-Stone pad template, 31-Support stone pad, 32-First template, 33-Second template, 34-First steel mold slide rail, 35-Second steel mold slide rail, 36-Long strip hole, 37-Locking bolt, 40-Composite beam. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0026] Please see Figures 1 to 10 One embodiment of the steel beam installation device includes multiple sets of supports 10, adjustment devices 20, and pad stone templates 30.

[0027] Please see Figures 1 to 3 Multiple sets of supports 10 are arranged at intervals at the bottom of the steel beam 1. The multiple sets of supports 10 are used to cooperate with the subsequently poured support pads 31 to support the steel beam 1.

[0028] In one embodiment, since the steel beam 1 may be installed at an angle on the cap beam 2, the support 10 is connected to the bottom of the steel beam 1 via a first leveling member 11. The first leveling member 11 can adjust the bottom of the support 10 to a horizontal state, facilitating the subsequent support pad 31 to support the support 10. Specifically, the first leveling member 11 can be a wedge-shaped steel plate, which is welded to the bottom of the steel beam 1, and the support 10 is welded and fixed to the bottom of the first leveling member 11.

[0029] Please refer to the following: Figure 4 The adjustment device 20 includes a lifting mechanism 21, a support frame 22, and a traveling system 23. The lifting mechanism 21 is arranged on the cap beam 2 and connected to the support frame 22. The lifting mechanism 21 is supported on the cap beam 2, and the lifting and lowering of the support frame 22 is achieved through the extension and retraction of the lifting mechanism 21. The support frame 22 supports the traveling system 23 and the steel crossbeam 1. The traveling system 23 is installed on the support frame 22 and is used to suspend the steel crossbeam 1. Specifically, the lifting mechanism 21 drives the support frame 22 to lift and lower, thereby adjusting the elevation of the steel crossbeam 1. The traveling system 23 moves on the support frame 22 to adjust the longitudinal position of the steel crossbeam 1.

[0030] In one embodiment, the support frame 22 includes two uprights 221 and a crossbar 222. The crossbar 222 is connected to the top ends of the two uprights 221, and the support frame 22 has a U-shaped structure. A lifting mechanism 21 is arranged inside the support frame 22 and is connected to the crossbar 222 of the support frame 22. A walking system 23 is installed on the crossbar 222. After the lifting mechanism 21 drives the support frame 22 to rise and fall to its position, the bottom end of the uprights 221 can be fixed to the cap beam 2 to ensure the stability of the subsequent longitudinal movement of the steel crossbeam 1.

[0031] In one embodiment, the lifting mechanism 21 is a jack, and a top block 24 is provided between the lifting mechanism 21 and the crossbar 222 to reduce the extension distance of the jack. Two sets of lifting mechanisms 21 are provided, and the two sets of lifting mechanisms 21 simultaneously lift the crossbar 222 to ensure the stability of the support frame 22 during lifting. The column 221 and the crossbar 222 are made of structural steel, and the bottom end of the column 221 can be fixed to the cap beam 2 by anchor bolts 223.

[0032] In one embodiment, the walking system 23 includes a sliding trolley 231 and a bracket 232. The rollers 233 of the sliding trolley 231 are arranged on the support frame 22. Specifically, the rollers 233 of the sliding trolley 231 are arranged on the crossbar 222 of the support frame 22, and the sliding trolley 231 rolls along the length of the crossbar 222. One end of the bracket 232 is connected to the sliding trolley 231, and the other end of the bracket 232 is connected to the steel crossbeam 1.

[0033] The sliding trolley 231 is equipped with hangers 232 on both sides to ensure the stability of the steel beam 1 suspension. Furthermore, the hanger 232 has an inwardly extending hook 234, which is inserted into the flange plate of the steel beam 1 and fixed with bolts to realize the connection between the hanger 232 and the steel beam 1.

[0034] In one embodiment, since the steel beam 1 may be installed at an angle on the cap beam 2, and the steel beam 1 passes through the opening of the support frame 22, with the top of the steel beam 1 in line contact with the crossbar 222 of the support frame 22, a second leveling member 25 is arranged in the gap between the steel beam 1 and the crossbar 222. The second leveling member 25 can adapt to the angled state of the steel beam 1 and keep the crossbar 222 of the support frame 22 in a horizontal state to ensure the stability of the suspended steel beam 1. Specifically, the second leveling member 25 can be a wedge-shaped steel plate.

[0035] Please refer to the following: Figure 5 and Figure 6 The pad stone template 30 is set in the gap between the cap beam 2 and the support 10. The pad stone template 30 is used to cast the support pad stone 31 between the cap beam 2 and the support 10. The support pad stone 31 can support the support 10, and thus support the entire steel beam 1.

[0036] Please refer to the following: Figure 7 and Figure 8 Existing templates for fabricating bearing pads 31 often use wooden templates with a fixed height, making them difficult to adjust. Therefore, in this embodiment, the pad template 30 includes a first template 32 and a second template 33, which are interlocked. The relative movement of the first template 32 and the second template 33 adjusts the height of the pad template 30 to meet the requirements of different bearing pad heights 31.

[0037] Based on the above embodiments, the first template 32 and the second template 33 have the same structure, both composed of two L-shaped steel plates, facilitating the installation and removal of the templates. The diameter of the second template 33 is smaller than that of the first template 32, and the second template 33 is partially inserted into the first template 32 to achieve interlocking. The two L-shaped steel plates of the first template 32 are connected by bolts, connecting the first template 32 circumferentially into a whole. At the same time, the first template 32 acts like a clamp to tighten the second template 33, thereby fixing the second template 33 circumferentially.

[0038] In one embodiment, a first steel mold slide rail 34 is provided on the outer side of the first template 32, and a second steel mold slide rail 35 is provided on the outer side of the second template 33. The first steel mold slide rail 34 and the second steel mold slide rail 35 are fitted together. Both the first steel mold slide rail 34 and the second steel mold slide rail 35 have elongated holes 36, and locking bolts 37 are inserted into the elongated holes 36. After the first template 32 and the second template 33 are relatively misaligned, the relative positions of the first template 32 and the second template 33 are fixed by tightening the locking bolts 37, thereby fixing the length of the entire pad stone template 30.

[0039] Please see Figure 9 The present invention also provides a construction method for a steel crossbeam, which utilizes the aforementioned steel crossbeam installation device. Specifically, the construction method includes the following steps: Step S110: Connect the steel beam 1 to the walking system 23 of the adjustment device 20, and install multiple sets of supports 10 at intervals at the bottom of the steel beam 1.

[0040] Specifically, the steel beam 1 is inserted into the doorway of the support frame 22, and then the hook 234 of the hanging bracket 232 of the walking system 23 is inserted under the flange plate of the steel beam 1. The hook 234 and the flange plate of the steel beam 1 are connected and fastened with bolts to suspend the steel beam 1 in the support frame 22.

[0041] The first leveling component 11 is welded to the bottom of the steel beam 1, and then the fixed support 10 is welded to the bottom of the first leveling component 11. The fixed installation of multiple sets of supports 10 is completed in sequence.

[0042] Step S120: Install the steel beam 1 together with the adjusting device 20 onto the top of the cover beam 2, and the lifting mechanism 21 of the adjusting device 20 is supported on the cover beam 2.

[0043] Specifically, a crane is used to hoist the steel crossbeam 1 and install it, along with the adjusting device 20, onto the top of the cap beam 2. During installation, the transverse position of the steel crossbeam 1 is adjusted to ensure the overall horizontal curve of the bridge deck. As the crane lowers the steel crossbeam 1, the two columns 221 of the support frame 22 are located on either side of the cap beam 2. Finally, the lifting mechanism 21 supports the top of the cap beam 2, thus suspending the steel crossbeam 1.

[0044] In one embodiment, before step S120, the method further includes: cleaning and roughening the old bridge concrete cap beam 2, and measuring the planar position and elevation of the side support pad stones 31 on both sides of the cap beam 2.

[0045] The process of cleaning the old bridge concrete cap beam 2 prevents debris from affecting the landing of the lifting mechanism 21 and the subsequent construction of the bearing pad 31. Roughening the old bridge concrete cap beam 2 ensures the connection strength between the bearing pad 31 and the cap beam 2 during subsequent construction, guaranteeing the stability of the bearing pad 31. Measuring the planar position and elevation of the bearing pad 31 on both sides of the cap beam 2 is used to determine the position and top elevation of the two side beams of the steel crossbeam 1.

[0046] Step S130: The lifting mechanism 21 is raised and lowered to adjust the elevation of the steel crossbeam 1, and the traveling system 23 is moved on the support frame 22 to adjust the longitudinal position of the steel crossbeam 1.

[0047] Specifically, the lifting mechanism 21 lifts the crossbar 222 of the support frame 22 upwards, thereby lifting and lowering the support frame 22, which in turn drives the steel crossbeam 1 to rise and fall. Once the top elevation of the two side crossbeams of the steel crossbeam 1 reaches the required level, it indicates that the height position of the steel crossbeam 1 is determined. At this time, bolts are used to fix the bottom end of the column 221 to the cover beam 2, fixing the position of the support frame 22 and ensuring the stability of the adjustment device 20.

[0048] Next, the rollers 233 of the sliding trolley 231 are made to roll on the crossbar 222 of the support frame 22, so that the walking system 23 can move on the support frame 22. The movement of the walking system 23 drives the steel crossbeam 1 to move along the longitudinal direction of the bridge, and adjusts the longitudinal position of the steel crossbeam 1 to meet the design requirements.

[0049] Step S140: After the steel beam 1 is adjusted into place, the support pad stone 31 is poured between the cap beam 2 and the support 10 through the pad stone template 30.

[0050] Specifically, after the steel beam 1 is adjusted into place, the elevations of all bearing pads 31 become clear. The top elevation of the bearing pad 31 is the same as the bottom elevation of the support 10 pre-fixed on the steel beam 1. Then, the bearing pads 31 are constructed. Pad formwork 30 is installed at the location of the bearing pads 31. By adjusting the relative position of the first formwork 32 and the second formwork 33, the height of the pad formwork 30 is adjusted to meet the height requirements of the bearing pads 31. After adjustment, the locking bolts 37 are tightened to fix the relative positions of the first formwork 32 and the second formwork 33, thus fixing the length of the entire pad formwork 30. Finally, concrete is poured inside the pad formwork 30 to complete the construction of the bearing pads 31.

[0051] Please refer to the following: Figure 10In one embodiment, after the support pad 31 is cast between the cap beam 2 and the support 10 using the pad template 30, the adjustment device 20 is not removed at this time. It can be used as a temporary fixing device during the installation of the composite beam 40 to prevent collisions during the subsequent installation of the composite beam 40, which could cause the steel crossbeam 1 to deviate or slip off the cap beam 2 and cause a safety accident. The adjustment device 20 is removed after the construction of the composite beam 40 is completed.

[0052] The aforementioned steel crossbeam installation device and its construction method first install the steel crossbeam 1 and then construct the pad stones downwards, systematically eliminating the cumulative error of measuring and constructing the pad stones from bottom to top, resulting in high construction accuracy. The longitudinal bridge can be precisely positioned longitudinally via the walking system 23, avoiding the need for cranes and manual adjustments on the pier tops (high-altitude work), which is less accurate and improves precision and safety. By pre-welding the first leveling component 11 to the bottom of the crossbeam and fixing the support 10 to the first leveling component 11, the critical path is not occupied, shortening the construction period. The adjustment device 20 can serve as a temporary fixing measure for the steel crossbeam 1, eliminating the need for temporary measures set up in traditional methods and saving costs. The height of the pad stone template 30 is adjustable to solve the problem of different template heights required for each pad stone, resulting in high efficiency, multiple turnovers, and convenient installation.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A steel beam mounting device, characterized in that, include: Multiple sets of supports, wherein the multiple sets of supports are arranged at intervals at the bottom of the steel beam; The adjustment device includes a lifting mechanism, a support frame, and a traveling system. The lifting mechanism is arranged on the cap beam and connected to the support frame. The traveling system is installed on the support frame and is used to suspend the steel crossbeam. The lifting mechanism is used to adjust the elevation of the steel crossbeam, and the traveling system's movement on the support frame is used to adjust the longitudinal position of the steel crossbeam. A bearing pad template is placed in the gap between the cap beam and the support. The bearing pad template is used to cast bearing pads between the cap beam and the support.

2. The steel beam installation device according to claim 1, characterized in that, The support is connected to the bottom of the steel beam via a first leveling component.

3. The steel beam installation device according to claim 1, characterized in that, The support frame includes two uprights and a crossbar. The bottom end of the uprights can be optionally fixed to the cover beam. The two ends of the crossbar are connected to the top ends of the two uprights. The walking system is installed on the crossbar.

4. The steel beam installation device according to claim 3, characterized in that, The steel crossbeam is arranged inside the doorway of the support frame, and a second leveling component is arranged in the gap between the steel crossbeam and the crossbar.

5. The steel beam installation device according to claim 1, characterized in that, The walking system includes a sliding trolley and a bracket. The rollers of the sliding trolley are arranged on the support frame. One end of the bracket is connected to the sliding trolley, and the other end of the bracket is connected to the steel crossbeam.

6. The steel beam installation device according to claim 1, characterized in that, The pad stone template includes a first template and a second template, which are nested together, and the relative displacement of the first template and the second template is used to adjust the height of the pad stone template.

7. A construction method for a steel crossbeam, characterized in that, Using the steel beam installation device as described in any one of claims 1-6, the construction method includes the following steps: Connect the steel crossbeam to the travel system of the adjustment device, and install multiple sets of supports at intervals at the bottom of the steel crossbeam; The steel crossbeam, together with the adjusting device, is installed on the top of the cover beam, and the lifting mechanism of the adjusting device is supported on the cover beam. The lifting device is used to raise and lower the steel crossbeam to adjust its elevation, and the traveling system is used to travel on the support frame to adjust the longitudinal bridge position of the steel crossbeam. After the steel beam is adjusted into place, the support pad stone is poured between the cap beam and the support through the pad stone template.

8. The construction method according to claim 7, characterized in that, Before the step of installing the steel crossbeam together with the adjusting device to the top of the cover beam, the following is also included: The concrete cap beam of the old bridge was cleaned and roughened, and the plane position and elevation of the bearing pads on both sides of the cap beam were measured.

9. The construction method according to claim 7, characterized in that, The specific steps for installing the steel crossbeam together with the adjustment device onto the top of the cover beam are as follows: The steel crossbeam is hoisted by a crane and installed on top of the cap beam along with the adjustment device, and the transverse position of the steel crossbeam is adjusted during the installation process.

10. The construction method according to claim 7, characterized in that, After the support pad stone is poured between the cap beam and the support using the pad stone template, the adjustment device is not removed temporarily and is used as a temporary fixing device during the installation of the composite beam.

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