A device for quickly positioning and controlling perpendicularity of a precast beam and a construction method thereof

Abstract

The application discloses a device for rapid positioning and verticality control of a precast beam and a construction method thereof, and relates to the technical field of precast beam construction. The device comprises a cap end structure arranged on the side of a cap and a bent cap end structure arranged on the side of a bent cap; a plurality of positioning guide plates and a plurality of verticality control components are arranged on the cap end structure and the bent cap end structure respectively and surround the outer periphery of a support cushion stone. The device can be used for positioning, guiding and verticality control, is beneficial to the rapid and accurate installation of the precast beam, is beneficial to the rapid positioning of the precast beam, can reduce the time for lifting and readjusting the precast beam, improve the installation precision of the planar position, reduce the safety risk of moving the precast beam with a crowbar, can pre-adjust the elevation and the level, is convenient to control, has consistent settlement, reduces the cumbersome procedures for verticality adjustment, has higher verticality precision and efficiency, and reduces the safety risk of adjusting the verticality of the beam bottom by workers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a device for rapid positioning and perpendicularity control of a prefabricated beam and a construction method thereof. BACKGROUND

[0002] In the installation process of a prefabricated beam (including a box beam, a T beam and the like), the planar position and the perpendicularity of the prefabricated beam need to be controlled. The control of the planar position ensures the width of the expansion joint, the wet joint and the pier top cast-in-place continuous section, and the control of the perpendicularity ensures the uniformity of the bridge deck pavement thickness and the non-biased load of the rubber support. The existing planar positioning of the prefabricated beam mostly relies on traditional process equipment such as a crowbar and a chain hoist to manually adjust the planar position of the prefabricated beam. This method has poor installation planar position precision, requires many adjustment times, consumes a long time, has a high risk of personnel being squeezed during position adjustment, and is difficult to ensure the installation planar position of the prefabricated beam. The perpendicularity control mostly uses a sand cylinder temporary support, but the sand filling amount in the two sand cylinders at the same end is inconsistent, and the settlement amount of the prefabricated beam after installation is difficult to control, resulting in a large perpendicularity deviation of the prefabricated beam. It is difficult to control the perpendicularity by discharging the fine sand in the sand cylinder at the high side, and the work efficiency is low. Moreover, the elevation adjustment of the sand cylinder temporary support not subjected to force due to the small sand filling amount in the sand cylinder is more complicated. The traditional construction method has low work efficiency and poor installation planar position and perpendicularity precision control, and the safety of workers during construction cannot be guaranteed. SUMMARY

[0003] The present application aims to solve the problems of low work efficiency, poor installation planar position and perpendicularity precision control and high safety risk of workers during construction in the prior art, and provides a device for rapid positioning and perpendicularity control of a prefabricated beam and a construction method thereof.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] A device for rapid positioning and perpendicularity control of a prefabricated beam, comprising a cap end structure arranged on the side of a cap and a bent cap end structure arranged on the side of a bent cap;

[0006] The cap end structure comprises a first structure bottom plate arranged around the outer periphery of a cap upper support cushion stone, a plurality of positioning guide plates are arranged on the first structure bottom plate, the positioning guide plates are arranged on the two side edges in the width direction (the width direction refers to the width direction of the installation of the prefabricated beam, i.e. the transverse bridge direction; the length direction of the prefabricated beam is the longitudinal bridge direction) and the side edge away from the bent cap end structure, and a plurality of perpendicularity control assemblies are arranged on the side edge of the first structure bottom plate close to the bent cap end structure;

[0007] The cap beam end structure comprises a second structure base plate arranged around the outer periphery of the cap beam upper support cushion stone, and a pair of extension portions are further arranged on one side of the cap beam end structure; a support spanning the support cushion stone is further arranged above the second structure base plate; a plurality of positioning guide plates are respectively arranged on the support and the extension portions; and a plurality of verticality control components are further arranged on the side edge of the second structure base plate close to the cap beam end structure.

[0008] The prefabricated beam rapid positioning and verticality control device has simple structure, is easy to manufacture and install, can play the roles of positioning, guiding and verticality control, is favorable for rapid and accurate installation of the prefabricated beam, is favorable for rapid positioning of the prefabricated beam, can reduce the time for readjusting and installing the prefabricated beam after being hoisted, improve the installation precision of the planar position, and reduce the safety risk of moving the prefabricated beam by a crowbar; the verticality control function can pre-adjust the elevation and the level, is convenient to control, has consistent settlement amount, reduces the cumbersome procedures for adjusting the verticality, has higher verticality precision and efficiency, and reduces the safety risk of adjusting the verticality by workers at the beam bottom.

[0009] Through the arrangement of the cap beam end structure and the cap beam end structure, the two ends of the prefabricated beam can be positioned and adjusted in verticality at the same time, the installation position of the fixed end and the size of the expansion joint of the movable end can be ensured, and the installation accuracy of the prefabricated beam is improved.

[0010] The cap beam end structure and the cap beam end structure are arranged around the respective support cushion stones, the position accuracy of the positioning guide plates on the respective structure base plates is ensured by the position accuracy of the support cushion stones, the guide insertion structures formed by the plurality of positioning guide plates at the two ends can just accommodate the two ends of the prefabricated beam, the two ends of the prefabricated beam are smoothly and accurately positioned, and the accuracy of the overall position is ensured.

[0011] The first structure base plate and the second structure base plate have simple structure, are easy to manufacture and install, the plurality of positioning guide plates have basically the same structure, can be mass-produced, and have good consistency; the first structure base plate and the second structure base plate have certain differences in structure, the first structure base plate further controls the size and position of the construction joint by using the positioning guide plates arranged above the first structure base plate, and the second structure base plate further ensures the fixed position of the fixed end of the prefabricated beam by using the positioning guide plates arranged above the second structure base plate.

[0012] The verticality control component can support from multiple positions of the two ends of the prefabricated beam, i.e., the support cushion stones of the cap beam and the cap beam, and ensure the verticality and level of the prefabricated beam after being positioned and supported by pre-adjustment, which is more convenient and safer for workers to adjust.

[0013] Generally, the pier cap end structure is a movable end structure, and a telescopic joint exists between the end and the main body structure; in practice, the cap beam end structure can be a movable end structure or a fixed end structure, which is determined according to the number of the precast beams; if there is only one precast beam on the bridge, the cap beam end structure is a fixed end structure, and if there are several precast beams on the bridge, a telescopic joint is also arranged on the cap beam between adjacent precast beams (end of the precast beam), that is, two rows of support cushion stones and sliding rubber bearings are arranged on the cap beam. Moreover, the device can also be a double-pier cap movable end structure.

[0014] Further, the first structure bottom plate is a rectangular frame structure, including a pair of L-shaped plates and a pair of first straight plates, and the ends of the pair of L-shaped plates and the pair of first straight plates are respectively provided with connecting plates and are connected through a plurality of connecting bolts; the pair of L-shaped plates are arranged on the two sides in the width direction, and the width of the first straight plate arranged on the side close to the cap beam end structure is greater than that of the first straight plate on the other side; the side on which the first straight plate with the smaller width is located is the side on which the telescopic joint is located.

[0015] The arrangement of the pair of L-shaped plates and the pair of first straight plates can conveniently form a bottom plate structure on the outer periphery of the support cushion stone, facilitate connection and later disassembly, and does not affect the normal use of the support cushion stone and the rubber bearing. The arrangement of the connecting plates can increase the butt joint area, connect multiple connecting bolts at the same time, and enhance the connection strength and stability.

[0016] Further, the middle parts of the pair of L-shaped plates are respectively provided with one of the positioning guide plates and are correspondingly arranged (on a line) with the positioning guide plates on the extension part; the first straight plate with the smaller width is provided with a pair of the positioning guide plates and is correspondingly arranged with the positioning guide plates on the support in one-to-one correspondence, and the other first straight plate is provided with a pair of the perpendicularity control assemblies.

[0017] Further, the second structure bottom plate includes a pair of F-shaped plates and a pair of second straight plates, the part of the F-shaped plate extending in the length direction is the extension part, the ends of the pair of F-shaped plates and the pair of second straight plates are provided with connecting plates and are connected through a plurality of connecting bolts, and the two ends of the support are respectively connected to the F-shaped plates, and a pair of the perpendicularity control assemblies are arranged on the second straight plate close to the extension part.

[0018] The pair of F-shaped plates can form an extension part on the side of the precast beam in the length direction by using the part extending therefrom, and the positioning guide can also be performed by arranging the positioning guide plate at this position, and the support arranged transversely can form a positioning guide support above the support cushion stone, so that the fixed end of the precast beam can be fixed there.

[0019] Furthermore, the positioning guide plate includes an integrally formed rectangular portion and a right-angled trapezoidal portion. The right-angled trapezoidal portion is gradually smaller in size from top to bottom, and the inclined surfaces of the right-angled trapezoidal portion are all oriented towards the side where the support pad is located. This arrangement facilitates the rapid placement of the precast beam, reduces the time required to lift and readjust the precast beam for installation, and reduces the safety risks associated with moving the precast beam with a pry bar. The positioning guide plate is also provided with first stiffening ribs on both sides to increase rigidity and stability.

[0020] Furthermore, the bracket is an "n"-shaped bracket, and a pair of clamping plates are provided on both sides of the second structural base plate. The pair of side plates of the bracket are respectively clamped between the pair of clamping plates and fixed by connecting bolts. The clamping plates are provided with a number of screw holes spaced apart along the length direction so that the installation position of the bracket is adjustable.

[0021] The clamp is made of two long strip steel plates welded to the second structural base plate, and multiple connecting bolt holes are drilled on the two steel plates. The width between the two steel plates is slightly greater than the thickness of the side wall of the support. The positioning guide plate and the support in the longitudinal direction of the bridge can be moved, adjusted and fixed in the longitudinal direction to ensure that it matches the length of the precast beam.

[0022] Furthermore, the verticality control component includes a threaded support rod disposed on the first structural base plate or the second structural base plate, the threaded support rod being provided with a sleeve, an upper support plate being disposed above the sleeve, and a plurality of second stiffening ribs being disposed around the threaded support rod; the height of the upper support plate is higher than the height of the rubber support disposed on the support pad stone.

[0023] The verticality control component with this structure is simple in structure and easy to adjust. It can also be rotated downwards to separate later, which facilitates complete disassembly and allows it to be reused repeatedly along with the base plate.

[0024] Furthermore, the support pad on the cap is provided on the side near the expansion joint (one side of the positioning guide plate on this side abuts against the side wall of the support pad and the other side abuts against the outer structural wall of the cap), and a sliding rubber support is provided on the support pad on the cap; a support pad is provided in the middle of the cap beam and a fixed rubber support is provided above the support pad, and the bracket is arranged across the fixed rubber support; the two sides of the precast beam in the width direction are inclined, the outer wall of the movable end of the precast beam is a straight wall, the outer wall of the fixed end of the precast beam is an inclined wall, and a locking structure is provided at the lower end.

[0025] Furthermore, a construction method for rapid positioning and verticality control of precast beams involves, after the construction of the cap, the cap beam, and the bearing pad, placing sliding rubber bearings on the bearing pad on the side of the cap and fixed rubber bearings on the bearing pad on the side of the cap beam. Then, devices for rapid positioning and verticality control of the precast beams are installed around the bearing pads on both the cap and the cap beam. The fabrication and installation method of these devices (i.e., the cap end structure and the cap beam end structure) is as follows:

[0026] (1) Make the C-shaped plate and the first straight plate that make up the first structural base plate, the F-shaped plate and the second straight plate that make up the second structural base plate, the positioning guide plate and the bracket, and prepare several clamping plates and connecting bolts.

[0027] (2) The positioning guide plate is welded and fixed to the C-shaped plate, part of the first straight plate, the extension of the F-shaped plate, part of the second straight plate and the bracket respectively, and first stiffening ribs are welded to both sides of the positioning guide plate; a pair of threaded support rods are welded to the remaining first straight plate and second straight plate respectively, and several second stiffening ribs are welded to the outer periphery of the threaded support rods. A sleeve is provided on the threaded support rod, and a horizontally arranged upper support plate is welded to the end of the sleeve; a pair of clamping plates are welded to the F-shaped plate respectively.

[0028] (3) The C-shaped plate is placed on both sides of the width direction of the platform cap and the positioning guide plate abuts against the side wall of the support pad stone. The first straight plate is placed on the other two sides of the support pad stone. The first straight plate with the positioning guide plate is placed between the support pad stone and the structural side wall. The C-shaped plate and the first straight plate are connected and fixed by connecting bolts.

[0029] The F-shaped plate is tightly set on both sides of the support pad stone on the cap beam, and a pair of second straight plates are tightly set on the other two sides. The F-shaped plate and the second straight plates are connected by connecting bolts. The two side plates of the bracket are respectively inserted between the pair of clamps. After adjusting the fixed end position in the length direction according to the length of the precast beam, they are fixed by connecting bolts.

[0030] Both the cap beam end structure and the abutment cap end structure can be installed after the rubber bearings are installed, without negatively impacting the main structure. They also eliminate the need for drilling or slotting in the bearing pads, abutment caps, and cap beams, ensuring the integrity of the original structure and facilitating construction. Furthermore, the structures are installed through assembly; the components can be fabricated on the ground or in the workshop, and then simply bolted together on-site. This reduces the time workers spend at heights, lowers installation difficulty, and improves construction efficiency. The assembly method also facilitates disassembly later.

[0031] Furthermore, after the device is installed in place, the elevation and horizontal position of the upper support plate are pre-adjusted to ensure that all the upper support plates are at the same elevation and horizontal; the precast beam is hoisted using lifting tools and ropes, and during the lowering process, the two ends of the precast beam are guided by the positioning guide plates respectively, and naturally fall onto the upper support plate, and then onto the sliding rubber support and the fixed rubber support; after the precast beam is installed, the first structural base plate and the second structural base plate are removed from the side.

[0032] Specifically, the sleeve is adjusted synchronously to lower the upper support plate until both ends of the precast beam rest on the sliding rubber support and the fixed rubber support, respectively, or by setting shims or other components to support the precast beam on the sliding rubber support and the fixed rubber support. After the precast beam is installed, the upper support plate is lowered, the connecting bolts on the connecting plate are loosened, and the first and second structural base plates are removed from under the precast beam.

[0033] Compared with the prior art, the beneficial effects of the present invention are: 1. The precast beam rapid positioning and verticality control device has a simple structure, is easy to manufacture and install, and can play the roles of positioning, guiding and verticality control, which is conducive to the rapid and accurate installation of precast beams; the guiding and positioning function is conducive to the rapid placement of precast beams, which can reduce the time of lifting and readjusting the precast beams for installation, improve the accuracy of planar position installation, and reduce the safety risk of moving precast beams with pry bars; the verticality control function can pre-adjust the elevation and level, which is convenient to control, and the settlement is consistent, reducing the tedious process of verticality adjustment, and the verticality accuracy and efficiency are higher, reducing the safety risk of manually adjusting the verticality at the bottom of the beam; 2. Through the setting of the cap end structure and the cover beam end structure, the two ends of the precast beam can be positioned and vertically adjusted at the same time, while ensuring the installation position of the fixed end and the position and size of the expansion joint of the movable end, improving the installation accuracy of the precast beam; 3. The first The first and second structural base plates have simple structures, are easy to manufacture and install, and the structures of the positioning guide plates are basically the same, allowing for batch production and good consistency. The verticality control component can ensure the verticality and horizontality of the precast beam after it is positioned and supported by pre-adjusting from both ends of the precast beam, making adjustment more convenient and safer for workers. 4. Both the cap beam end structure and the abutment cap end structure can be installed after the rubber bearings are installed, without negatively impacting the main structure. There is no need to drill holes or cut grooves in the bearing pads, abutment caps, and cap beams, which ensures the integrity of the original structure and facilitates construction operations. 5. The installation of the two structural structures is carried out by assembly. They can be prefabricated and directly connected and assembled on the construction site, reducing the time workers spend working at heights, lowering the installation difficulty, and improving construction efficiency. Moreover, the assembly connection method makes it easy to disassemble later, and the device can be reused. Attached Figure Description

[0034] Figure 1 This is a longitudinal section schematic diagram of the device arrangement for rapid positioning and verticality control of precast beams according to the present invention.

[0035] Figure 2 This is a plan view of the device for rapid positioning and verticality control of precast beams according to the present invention.

[0036] Figure 3 This is a schematic diagram of the end face structure of the device of the present invention at the expansion joint location;

[0037] Figure 4 This is a schematic diagram of the cross-sectional structure of the device of the present invention at the expansion joint location;

[0038] Figure 5 This is a schematic diagram of the end face structure of the device of the present invention at the location of the cast-in-place continuous section at the top of the pier;

[0039] Figure 6 This is a schematic diagram of the cross-sectional structure of the device of the present invention at the location of the cast-in-place continuous section at the top of the pier;

[0040] Figure 7 This is a plan view of the expansion joint guiding positioning and perpendicularity control structure of the present invention.

[0041] Figure 8 This is a side view of the expansion joint guiding, positioning, and perpendicularity control structure of the present invention.

[0042] Figure 9 This is a schematic diagram of the end cross-section of the expansion joint guiding positioning and perpendicularity control structure of the present invention.

[0043] Figure 10 This is a schematic diagram of the mid-span cross-section of the expansion joint guiding, positioning, and verticality control structure of the present invention.

[0044] Figure 11 This is a plan view of the guide positioning and verticality control structure for the cast-in-place continuous section at the pier top of the present invention.

[0045] Figure 12 This is a side view of the guide positioning and verticality control structure for the cast-in-place continuous section at the pier top of the present invention.

[0046] Figure 13 This is a schematic diagram of the mid-span cross section of the cast-in-place continuous section guide positioning and verticality control structure at the pier top of the present invention.

[0047] Figure 14 This is a schematic diagram of the end cross-section of the guide positioning and verticality control structure for the cast-in-place continuous section at the pier top of the present invention.

[0048] In the diagram: 1. Abutment cap end structure; 11. Positioning guide plate; 12. First stiffening rib; 13. Connecting bolt; 14. Connecting plate; 15. First structural base plate; 1501. C-shaped plate; 1502. First straight plate; 16. Upper support plate; 17. Second stiffening rib; 18. Sleeve; 19. Threaded support rod; 2. Cap beam end structure; 20. Clamping plate; 21. Bracket; 3. Precast beam; 4. Abutment cap; 5. Cap beam; 6. Lifting tool; 7. Support pad; 8. Sliding rubber support; 9. Fixed rubber support; 10. Second structural base plate; 1001. F-shaped plate; 1002. Second straight plate; 1003. Extension. Detailed Implementation

[0049] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] like Figures 1-14 As shown, a device for rapid positioning and verticality control of precast beams includes a cap end structure 1 (expansion joint guide positioning and verticality control structure) set on the side where the cap 4 is located and a cap beam end structure 2 (pier top cast-in-place continuous section guide positioning and verticality control structure) set on the side where the cap beam 5 is located; this embodiment takes the positioning and verticality control of a single span of precast beam as an example.

[0052] The cap end structure 1 includes a first structural base plate 15 arranged around the outer periphery of the support pad 7 on the cap 4. The first structural base plate 15 is provided with a plurality of positioning guide plates 11. The positioning guide plates 11 are arranged on both sides in the width direction (the width direction refers to the width direction of the precast beam installation, i.e., the transverse direction of the bridge; the length direction of the precast beam is the longitudinal direction of the bridge) and on one side away from the cap beam end structure. The first structural base plate 15 is provided with a plurality of verticality control components on one side near the cap beam end structure 2.

[0053] The cap beam end structure 2 includes a second structural base plate 10 arranged around the outer periphery of the support pad stone 7 on the cap beam 5. The second structural base plate 10 is also provided with a pair of extensions 1003 on the side facing the cap end structure 1. A bracket 21 spanning the support pad stone is also provided above the second structural base plate 10. Several positioning guide plates 11 are respectively provided on the bracket 21 and the extensions 1003. Several verticality control components are also provided on the side of the second structural base plate 10 near the cap end structure.

[0054] This precast beam rapid positioning and verticality control device has a simple structure, is easy to manufacture and install, and can play the roles of positioning, guiding and verticality control, which is conducive to the rapid and accurate installation of precast beams. The guiding and positioning function facilitates the rapid placement of precast beams, reduces the time spent lifting and readjusting them for installation, improves the accuracy of planar position installation, and reduces the safety risks of moving precast beams with pry bars. The verticality control function can pre-adjust the elevation and level, is convenient to control, and ensures consistent settlement, reducing the tedious process of verticality adjustment, resulting in higher verticality accuracy and efficiency, and reducing the safety risks of manually adjusting verticality at the bottom of the beam.

[0055] By setting the cap end structure 1 and the cover beam end structure 2, the two ends of the precast beam 3 can be positioned and the verticality adjusted simultaneously. At the same time, the installation position of the fixed end and the size of the expansion joint of the movable end can be guaranteed, thereby improving the installation accuracy of the precast beam.

[0056] Both the cap end structure 1 and the cap beam end structure 2 are set around the end support pads 7. The positional accuracy of the support pads 7 is used to ensure the positional accuracy of the positioning guide plates on their respective structural base plates. The guide insertion structure formed by the several positioning guide plates 11 at both ends can just accommodate the two ends of the precast beam 3, so that the two ends of the precast beam 3 can be smoothly and accurately placed, thus ensuring the overall positional accuracy.

[0057] The first structural base plate 15 and the second structural base plate 10 have simple structures, are easy to manufacture and install, and the structures of the various positioning guide plates 11 are basically the same, which can be mass-produced and have good consistency. The first structural base plate 15 and the second structural base plate 10 have certain structural differences. The first structural base plate 15 also uses the positioning guide plate set above it to control the size and position of the construction joint, while the second structural base plate 10 also uses the positioning guide plate arranged above it to ensure the fixed position of the fixed end of the precast beam.

[0058] The verticality control component can provide support from multiple positions at both ends of the precast beam, namely the cap and the support pad on the cover beam. Through pre-adjustment, it ensures the verticality and horizontality of the precast beam after it is positioned and supported. For workers, the adjustment is more convenient and safer.

[0059] Furthermore, the first structural base plate 15 is a rectangular frame structure, including a pair of C-shaped plates 1501 and a pair of first straight plates 1502. The ends of the pair of C-shaped plates 1501 and the pair of first straight plates 1502 are respectively provided with connecting plates 14 and connected by several connecting bolts 13. The pair of C-shaped plates 1501 are arranged on both sides in the width direction. The width of the first straight plate arranged on the side closer to the end structure of the cap beam is greater than the width of the first straight plate on the other side. The side where the first straight plate with the smaller width dimension is located is the side where the expansion joint is located.

[0060] The arrangement of a pair of C-shaped plates 1501 and a pair of first straight plates 1502 facilitates the formation of a base plate structure around the bearing pad, enabling easy connection and subsequent disassembly without affecting the normal use of the bearing pad and rubber bearing. The connecting plate 14 increases the mating area, allowing multiple connecting bolts 13 to be connected simultaneously, thereby enhancing connection strength and stability.

[0061] Furthermore, a positioning guide plate 11 is provided in the middle part of each of the pair of C-shaped plates 1501 and is correspondingly arranged with the positioning guide plate on the extension 1003 (on a line). A pair of positioning guide plates 11 are provided on the first straight plate with a smaller width and are correspondingly arranged with the positioning guide plates on the bracket 21. A pair of verticality control components are provided on the other first straight plate.

[0062] Furthermore, the second structural base plate 10 includes a pair of F-shaped plates 1001 and a pair of second straight plates 1002. The portion of the F-shaped plates 1001 extending in the length direction is the extension portion 1003. The ends of the pair of F-shaped plates 1001 and the pair of second straight plates 1002 are provided with connecting plates 14 and connected by several connecting bolts 13. The two ends of the bracket 21 are respectively connected to the F-shaped plates 1001. A pair of verticality control components are provided on the second straight plates near the extension portion 1003.

[0063] A pair of F-shaped plates 1001 can form an extension 1003 on the side of the precast beam along its length by using a portion of its protrusion. The positioning guide plate 11 can be set at this position to guide the positioning of the precast beam. The bracket 21 is set across to form a positioning guide support above the support pad so that the fixed end of the precast beam can be fixed there.

[0064] Furthermore, the positioning guide plate 11 includes an integrally formed rectangular portion and a right-angled trapezoidal portion. The size of the right-angled trapezoidal portion gradually decreases from top to bottom, and the inclined surfaces of the right-angled trapezoidal portion are all oriented towards the side where the support pad stone is located. This arrangement facilitates the rapid placement of the precast beam, reduces the time required to lift and readjust the precast beam for installation, and reduces the safety risks associated with moving the precast beam with a pry bar. The positioning guide plate 11 is also provided with first stiffening ribs 12 on both sides to increase rigidity and stability.

[0065] Furthermore, the bracket 21 is an "n"-shaped bracket, and a pair of clamping plates 20 are respectively provided on both sides of the second structural base plate 10. The pair of side plates of the bracket 21 are respectively clamped between the pair of clamping plates 20 and fixed by connecting bolts. The clamping plates 20 are provided with a number of screw holes spaced along the length direction so that the installation position of the bracket is adjustable.

[0066] The clamp 20 is made of two long strip steel plates welded to the second structural base plate, and multiple connecting bolt holes are drilled on the two steel plates. The width between the two steel plates is slightly greater than the thickness of the side wall of the support. The positioning guide plate and the support in the longitudinal direction of the bridge can be moved, adjusted and fixed in the longitudinal direction to ensure that they match the length of the precast beam.

[0067] Furthermore, the verticality control component includes a threaded support rod 19 disposed on the first structural base plate 15 or the second structural base plate 10, a sleeve 18 disposed on the threaded support rod 19, an upper support plate 16 disposed above the sleeve 18, and a plurality of second stiffening ribs 17 disposed around the threaded support rod 19; the height of the upper support plate 16 is slightly higher than the height of the rubber support disposed on the support pad stone.

[0068] The verticality control component with this structure is simple in structure and easy to adjust. It can also be rotated downwards to separate later, which facilitates complete disassembly and allows it to be reused repeatedly along with the base plate.

[0069] The upper support plate 16 is adjusted to be slightly higher than the fixed rubber support and in a horizontal state. The elevation and level of the verticality control function components are adjusted by tightening the sleeve to ensure that the two sets of verticality control function components are in a horizontal state, so as to ensure that the verticality of the precast beam meets the requirements.

[0070] Furthermore, the support pad on the cap 4 is provided on the side near the expansion joint (one side of the positioning guide plate abuts against the side wall of the support pad and the other side abuts against the outer structural wall of the cap), and a sliding rubber support 8 is provided on the support pad on the cap 4; a support pad is provided in the middle of the cap beam 5 and a fixed rubber support 9 is provided above the support pad, and the bracket 21 is arranged across the fixed rubber support; the two sides of the precast beam 3 in the width direction are inclined, the outer wall of the movable end of the precast beam 3 is a straight wall, the outer wall of the fixed end of the precast beam 3 is an inclined wall, and a locking structure is provided at the lower end.

[0071] Furthermore, a construction method for rapid positioning and verticality control of precast beams involves, after the abutment cap 4, cap beam 5, and bearing pad 7 are constructed, placing sliding rubber bearings 8 on the bearing pad on the side where the abutment cap 4 is located, and placing fixed rubber bearings 9 on the bearing pad on the side where the cap beam 5 is located. Then, devices for rapid positioning and verticality control of precast beams are installed around the bearing pads on the abutment cap 4 and the cap beam 5, respectively. The manufacturing and installation method of the devices is as follows:

[0072] (1) Make the C-shaped plate 1501 and the first straight plate 1502 that make up the first structural base plate 15, the F-shaped plate 1001 and the second straight plate 1002 that make up the second structural base plate 10, the positioning guide plate 11 and the bracket 21, and prepare several clamping plates 20 and connecting bolts.

[0073] (2) The positioning guide plate 11 is welded and fixed to the C-shaped plate 1501, part of the first straight plate 1502, the extension of the F-shaped plate 1001, part of the second straight plate 1002 and the bracket 21 respectively, and first stiffening ribs 12 are welded to both sides of the positioning guide plate 11; a pair of threaded support rods 19 are welded to the remaining first straight plate 1502 and second straight plate 1002 respectively, and several second stiffening ribs 17 are welded to the outer periphery of the threaded support rods 19. A sleeve 18 is provided on the threaded support rods 19, and a horizontally arranged upper support plate 16 is welded to the end of the sleeve 18; a pair of clamping plates 20 are welded to the F-shaped plate 1001 respectively; and the connecting plate 14 is welded to the ends of the C-shaped plate 1501, the first straight plate 1502, the F-shaped plate 1001 and the second straight plate 1002.

[0074] (3) The C-shaped plate 1501 is placed on both sides of the width direction of the platform cap and the positioning guide plate abuts against the side wall of the support pad stone. The first straight plate 1502 is placed on the other two sides of the support pad stone. The first straight plate with the positioning guide plate is placed between the support pad stone and the structural side wall. The C-shaped plate 1501 and the first straight plate 1502 are connected and fixed by connecting bolts.

[0075] The F-shaped plate 1001 is tightly set on both sides of the support pad stone on the cap beam, and a pair of second straight plates 1002 are tightly set on the other two sides. The F-shaped plate 1001 and the second straight plates 1002 are connected by connecting bolts. The two side plates of the bracket 21 are respectively inserted between a pair of clamping plates 20. After adjusting the fixed end position in the length direction according to the length of the precast beam, they are fixed by connecting bolts.

[0076] Both the cap beam end structure 2 and the abutment cap end structure 1 can be installed after the rubber bearings are installed, without negatively impacting the main structure. They also eliminate the need for drilling or slotting in the bearing pads, abutment caps, and cap beams, ensuring the integrity of the original structure and facilitating construction. Furthermore, the structures are installed through assembly, allowing for simple bolt connections and assembly on-site after the components are fabricated on the ground or in the workshop. This reduces the time workers spend working at heights, lowers installation difficulty, and improves construction efficiency. The assembly connection method also facilitates disassembly later.

[0077] Furthermore, after the device is installed in place, the elevation and horizontal position of the upper support plates 16 are pre-adjusted to ensure that all upper support plates 16 are at the same elevation and horizontal. The precast beam 3 is then hoisted using the lifting device 6. During the lowering process, the two ends of the precast beam 3 are guided by the positioning guide plates 11 and naturally fall onto the upper support plates 16. Simultaneously, the sleeves 18 are adjusted to slightly lower the upper support plates 16 until both ends of the precast beam 3 rest on the sliding rubber supports 8 and the fixed rubber supports 9, respectively. After the precast beam is installed, the upper support plates 16 are lowered, the connecting bolts on the connecting plates are loosened, and the first structural base plate 15 and the second structural base plate 10 are removed from below the precast beam 3.

[0078] After the precast beam is installed, although the space above is limited, there is still space around the support pad. After loosening the connecting bolts, the F-shaped plate and the first straight plate can be easily pulled out from the side, and the cap end structure can be completely recycled. When disassembling the cap beam end structure, after loosening all the connecting bolts, first move the bracket outward, and then move out the F-shaped plate and the second straight plate to completely recycle the cap beam end structure. The positioning guide plate and verticality control component above the recycled cap end structure and cap beam end structure are still there and can be directly reused.

[0079] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction method for a device for rapid positioning and verticality control of precast beams, characterized in that, The device includes a cap end structure disposed on the cap side and a cap beam end structure disposed on the cap beam side; the cap end structure includes a first structural base plate disposed around the outer periphery of the upper support pad stone of the cap, the first structural base plate is provided with a plurality of positioning guide plates, the positioning guide plates are disposed on both sides in the width direction and on the side away from the cap beam end structure, and the first structural base plate is provided with a plurality of verticality control components on the side of the first structural base plate near the cap beam end structure; the cap beam end structure includes a second structural base plate disposed around the outer periphery of the upper support pad stone of the cap beam, the second structural base plate is also provided with a pair of extensions on the side facing the cap end structure, a bracket spanning the support pad stone is also provided above the second structural base plate, the bracket and the extensions are respectively provided with a plurality of positioning guide plates, and the second structural base plate is also provided with a plurality of verticality control components on the side of the second structural base plate near the cap end structure. The first structural base plate is a rectangular frame structure, including a pair of C-shaped plates and a pair of first straight plates. Connecting plates are provided at the ends of the pair of C-shaped plates and the ends of the pair of first straight plates, and the corresponding connecting plates on the C-shaped plates and the first straight plates are connected by several connecting bolts. The pair of C-shaped plates are arranged on both sides in the width direction. The width of the first straight plate on the side closer to the end structure of the cap beam is greater than the width of the first straight plate on the other side. The side with the smaller width of the first straight plate is the side where the expansion joint is located. The second structural base plate includes a pair of F-shaped plates and a pair of second straight plates. The portion of the F-shaped plates extending in the length direction is the extension portion. Connecting plates are provided at the ends of the pair of F-shaped plates and the ends of the pair of second straight plates, and the corresponding connecting plates on the F-shaped plates and the second straight plates are connected by several connecting bolts. The two ends of the bracket are respectively connected to the F-shaped plates. A pair of verticality control components are provided on the second straight plates near the extension portion. The bracket is an "n"-shaped bracket. A pair of clamping plates are provided on each side of the second structural base plate. A pair of side plates of the bracket are clamped between the clamping plates and fixed with connecting bolts. Several screw holes are spaced along the length of the clamping plates to allow for adjustable mounting position of the bracket. The verticality control component includes a threaded support rod mounted on either the first or second structural base plate. A sleeve is mounted on the threaded support rod, and an upper support plate is mounted above the sleeve. Multiple second stiffening ribs are also provided around the threaded support rod. The height of the upper support plate is higher than the height of the rubber support mounted on the support pad. After the construction of the cap, the cap beam and the bearing pad is completed, the sliding rubber bearing is set on the bearing pad on the side where the cap is located, and the fixed rubber bearing is set on the bearing pad on the side where the cap beam is located. Then, devices for quick positioning and verticality control of precast beams are set on the cap and the cap beam around the bearing pad. The method for manufacturing and installing the device is as follows: (1) Make the C-shaped plate and the first straight plate that make up the first structural base plate, the F-shaped plate and the second straight plate that make up the second structural base plate, the positioning guide plate and the bracket, and prepare several clamping plates and connecting bolts; (2) The positioning guide plate is welded and fixed to the C-shaped plate, part of the first straight plate, the extension of the F-shaped plate, part of the second straight plate and the bracket respectively, and first stiffening ribs are welded to both sides of the positioning guide plate; a pair of threaded support rods are welded to the remaining first straight plate and second straight plate respectively, and several second stiffening ribs are welded to the outer periphery of the threaded support rods. A sleeve is provided on the threaded support rod, and a horizontally arranged upper support plate is welded to the end of the sleeve; a pair of clamping plates are welded to the F-shaped plate respectively. (3) The C-shaped plate is placed on both sides of the width direction of the platform cap and the positioning guide plate abuts against the side wall of the support pad stone. The first straight plate is placed on the other two sides of the support pad stone. The first straight plate with the positioning guide plate is placed between the support pad stone and the structural side wall. The C-shaped plate and the first straight plate are connected and fixed by connecting bolts. The F-shaped plate is tightly set on both sides of the support pad stone on the cap beam, and a pair of second straight plates are tightly set on the other two sides. The F-shaped plate and the second straight plates are connected by connecting bolts. The two side plates of the bracket are respectively inserted between the pair of clamps. After adjusting the fixed end position in the length direction according to the length of the precast beam, they are fixed by connecting bolts.

2. The construction method of the device for rapid positioning and verticality control of precast beams according to claim 1, characterized in that, Each of the two C-shaped plates has a positioning guide plate in the middle portion, which corresponds to the positioning guide plate on the extension. The first straight plate with a smaller width has a pair of positioning guide plates, which correspond one-to-one with the positioning guide plates on the bracket. The other first straight plate has a pair of verticality control components.

3. The construction method of the device for rapid positioning and verticality control of precast beams according to claim 1, characterized in that, The positioning guide plate includes an integrally formed rectangular part and a right-angled trapezoidal part, and the inclined surfaces of the right-angled trapezoidal part are all set towards the side where the support pad stone is located; the positioning guide plate is also provided with a first stiffening rib on both sides.

4. The construction method of the device for rapid positioning and verticality control of precast beams according to claim 1, characterized in that, The support pad on the cap is set on the side near the expansion joint, and a sliding rubber support is set on the support pad on the cap; the middle of the cap beam is set with a support pad and a fixed rubber support is set above the support pad, and the bracket is arranged across the fixed rubber support; the two sides of the precast beam in the width direction are inclined, the outer wall of the movable end of the precast beam is a straight wall, the outer wall of the fixed end of the precast beam is an inclined wall, and the lower end is also provided with a locking structure.

5. The construction method of the device for rapid positioning and verticality control of precast beams according to claim 1, characterized in that, After the device is installed in place, the elevation and horizontal position of the upper support plate are pre-adjusted to ensure that all the upper support plates are at the same elevation and horizontal. The precast beam is hoisted using a lifting tool and rope. During the lowering process, the two ends of the precast beam are guided by the positioning guide plate and fall naturally onto the upper support plate, and then onto the sliding rubber support and the fixed rubber support. After the precast beam is installed, the first structural base plate and the second structural base plate are removed from the side.

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