Expansion joint connection structural members for fixed buildings, fixed buildings and construction methods for expansion joint renovation

Abstract

The present invention provides an expansion joint connection structural member for fixing a building, a fixed building and a construction method for expanding joint transformation, which relates to the technical field of building construction. The technical problems of poor structural connection reliability and short service life existing in the prior art are solved. The expansion joint connection structural member for fixing a building includes a left intermediate beam, a right intermediate beam, a left side beam, a right side beam, a front sliding rod, a rear sliding rod, a left limit guiding box, a right limit guiding box, a convex column, a claw and a rubber strip. A plurality of left limit guiding boxes are welded on the outer side of the left intermediate beam, and a plurality of right limit guiding boxes are welded on the outer side of the right intermediate beam; both ends in the length direction of the front sliding rod and the rear sliding rod are respectively inserted into the left limit guiding box and the right limit guiding box, and there is a gap between the two ends and the inner walls of the left limit guiding box and the right limit guiding box. The connection of the present invention has good reliability and long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly relates to an expansion joint connection structural member for fixing a building, a fixed building provided with the expansion joint connection structural member for fixing the building, and a construction method for expansion joint transformation. Background Art

[0002] The expansion joint connection structural member for fixing a building is an important member for connecting and sealing the expansion joint during the building construction process to ensure the service life of the fixed building and its performance of resisting thermal expansion and contraction.

[0003] The existing expansion joint connection structural member for fixing a building includes two side beams, and there is a gap between the two side beams, which forms a single expansion joint. The length directions of the two side beams are parallel to the length direction of the installation notch of the fixed building. Each of the two side beams is welded to the embedded steel bars fixed in the installation notch of the fixed building, and then the expansion joint formed by the gap between the two side beams is sealed with a rubber strip.

[0004] The applicant of the present invention has found that the prior art has at least the following technical problems:

[0005] 1. In the prior art, when the two side beams deform under the action of thermal expansion and contraction, there is a lack of a structure for deformation correction and guidance, resulting in inconsistent widths at various parts of the expansion joint after the side beams deform. The side beam with a larger deformation amount is prone to welding failure and detachment from the embedded steel bars, and the rubber strip is also prone to falling off, resulting in poor structural connection reliability and short service life;

[0006] 2. In the prior art, the width of a single expansion joint cannot be set too large. Otherwise, on the one hand, it will affect the surface flatness of the fixed building and the overall structural strength, resulting in a reduction in the overall structural connection reliability of the fixed building. On the other hand, the rubber strip for sealing the expansion joint is a flexible part and cannot be made too wide, otherwise it will collapse and deform under a slight impact, causing the sealing to fail. Summary of the Invention

[0007] The embodiments of the present invention provide an expansion joint connection structural member for fixing a building, a fixed building provided with the expansion joint connection structural member for fixing the building, and a construction method for expansion joint transformation, which solve the technical problems of poor structural connection reliability and short service life existing in the prior art.

[0008] The embodiments of the present invention provide the following technical solutions:

[0009] An expansion joint connection structural member for fixing a building provided by an embodiment of the present invention includes a left middle beam, a right middle beam, a left side beam, a right side beam, a front sliding rod, a rear sliding rod, a left limit guiding box, a right limit guiding box, a convex column, a claw, and a rubber strip, wherein:

[0010] The length directions of the left intermediate beam, the right intermediate beam, the left side beam, and the right side beam are parallel to each other. The left intermediate beam and the right intermediate beam are located between the left side beam and the right side beam. There are gaps between the left intermediate beam and the right intermediate beam, between the left side beam and the left intermediate beam, and between the right side beam and the right intermediate beam, and these gaps form expansion joints. The rubber strips are embedded in the expansion joints.

[0011] The claw is in an n shape and is sleeved outside the left side beam and the right side beam and welded to the left side beam and the right side beam. There is a gap between the claw and the left intermediate beam and the right intermediate beam.

[0012] A plurality of the left limit guide boxes are welded to the outside of the left intermediate beam, and a plurality of the right limit guide boxes are welded to the outside of the right intermediate beam. Both the front slide bar and the rear slide bar are welded to the lower surfaces of the left intermediate beam, the right intermediate beam, the left side beam, and the right side beam. The length directions of the front slide bar and the rear slide bar are perpendicular to the length directions of the left intermediate beam, the right intermediate beam, the left side beam, and the right side beam. Both ends in the length direction of the front slide bar and the rear slide bar are inserted into the left limit guide box and the right limit guide box respectively, and there are gaps between these two ends and the inner walls of the left limit guide box and the right limit guide box. Both the left limit guide box and the right limit guide box are of a cube structure, and a plurality of convex columns with the same length dimension are fixedly arranged on their respective bottom surfaces and on the outer walls perpendicular to the left side beam and the right side beam.

[0013] Optionally, the expansion joint connection structure member for fixing a building further includes a left bracket and a right bracket, where: both the left bracket and the right bracket are right triangle structures with the ratio of the bottom side to the waist length being relatively large (the bottom side is greater than the waist length), and they are respectively fixed to the left side beam and the right side beam through connecting plates. At the same time, a bracket connecting steel bar is penetrated through their interiors, and the length direction of the bracket connecting steel bar is parallel to the length directions of the left intermediate beam, the right intermediate beam, the left side beam, and the right side beam.

[0014] The convex column includes a cylindrical part and a convex column head in the shape of a circular plate integrally connected to the cylindrical part. The cylindrical part is connected to the outer wall of the left limit guide box or the right limit guide box. The middle part of the convex column head is connected to the cylindrical part, and the outer diameter of the convex column head is larger than that of the cylindrical part.

[0015] Optionally, the gap sizes between adjacent convex columns are the same; and / or, both the front sliding rod and the rear sliding rod are cuboid-shaped hollow structures. The left limit guiding box and the right limit guiding box each include a bottom box body, a guiding frame located inside the bottom box body, a transverse limit bolt, a longitudinal limit bolt, and a top cover. A plurality of mounting holes are provided at the edge of the top cover, and a number of screw holes consistent with the mounting holes are provided at the top of the side wall of the bottom box body. A plurality of connecting screws passing through the mounting holes and threadedly connected to the screw holes detachably connect the top cover and the bottom box body together, and the tops of the connecting screws are flush with the top surface of the top cover. The guiding frame is welded and fixed inside the bottom box body; the transverse limit bolts include a front transverse limit bolt and a rear transverse limit bolt, and the longitudinal limit bolts include a front longitudinal limit bolt and a rear longitudinal limit bolt. The guiding frame is in a square shape and includes an inner guiding partition board, an outer limit partition board, a front side limit partition board, and a rear side limit partition board. Both ends of the front sliding rod and the rear sliding rod in their respective length directions respectively penetrate through the guiding through holes on the inner guiding partition boards of the guiding frames of the left limit guiding box and the right limit guiding box. The screw rod parts of the front transverse limit bolt and the rear transverse limit bolt are threadedly connected to the outer limit partition board, and the bolt heads of both are oriented towards the ends of the front sliding rod and the rear sliding rod respectively penetrating through the guiding through holes. The screw rod part of the front longitudinal limit bolt is threadedly connected to the front side limit partition board, and the bolt head of the front longitudinal limit bolt is oriented towards the end of the front sliding rod penetrating through the guiding through hole. The screw rod part of the rear longitudinal limit bolt is threadedly connected to the rear side limit partition board, and the bolt head of the rear longitudinal limit bolt is oriented towards the end of the rear sliding rod penetrating through the guiding through hole. Twisting the front transverse limit bolt, the rear transverse limit bolt, the front longitudinal limit bolt, and the rear longitudinal limit bolt can twist their respective bolt heads to positions where they abut against the ends of the front sliding rod and the rear sliding rod respectively penetrating through the guiding through holes in their respective length directions.

[0016] Optionally, the convex columns are evenly distributed on the bottom surfaces of the left limit guide box and the right limit guide box respectively, and on the outer wall surfaces perpendicular to the left side beam and the right side beam of both; and / or, a plurality of buffer springs and an equal number of guide rings as the buffer springs are fixedly arranged on the part of the bottom surface of the bottom box body located inside the inner guide partition. The buffer springs are located inside the guide rings, and support members are inserted into the buffer springs. Each support member includes a support plate and a limit post. One end of the limit post is inserted into the central hole of the buffer spring, and there is a gap between this end and the bottom surface of the bottom box body. The other end of the limit post is fixedly connected to the support plate. The support plate is disc-shaped and is slidably connected to the inner wall of the guide ring. A plurality of support bolts are threadedly connected to the edge of the support plate, and the bolt heads of the support bolts abut against the front sliding rod and the rear sliding rod, and the front sliding rod and the rear sliding rod can slide relative to the bolt heads of the support bolts.

[0017] Optionally, the gaps between the left intermediate beam and the right intermediate beam, the gap between the left side beam and the left intermediate beam, and the gap between the right side beam and the right intermediate beam are the same in size, and the sum of the sizes of the three, △L, satisfies the following formula:

[0018] △L = α × (△L1 + △L2)

[0019] △L1 = β × L × (Tmax - To)

[0020] △L2 = β × L × (To - Tmin)

[0021] Where: α is the expansion and contraction experience coefficient of the fixed building, and its value is 0.4 - 0.5;

[0022] △L1 is the elongation caused by the temperature rising to the local highest temperature, unit: mm;

[0023] △L2 is the shortening caused by the temperature dropping to the local lowest temperature, unit: mm;

[0024] β is the coefficient of thermal expansion of the material of the structural member connected by the expansion joint of the fixed building, and its value is 10×10 -6 ~12×10 -6 ;

[0025] L is the sum of the distances from the neutral point of deformation of the fixed building to the expansion joint, unit: mm;

[0026] Tmax—the local highest effective air temperature value, unit: °C;

[0027] Tmin—the local lowest effective air temperature value, unit: °C;

[0028] To—Air temperature value at installation time.

[0029] Optionally, the middle portion of the top surface of each of the left middle beam and the right middle beam is provided with an anti-slip groove extending along the entire length direction thereof.

[0030] Optionally, the left beam and the right beam each include a top edge, a side edge and a bottom edge connected in sequence, the width of the bottom edge is greater than that of the top edge, and the bottom edge is welded and fixed to the left limit guide box or the right limit guide box.

[0031] A fixed building provided by an embodiment of the present invention comprises an installation slot and an expansion joint connecting structural member for a fixed building (the fixed building may be a bridge or a road) provided by the above-mentioned embodiment of the present invention installed on the installation slot, wherein the side wall or the bottom surface of the installation slot is fixedly provided with protruding embedded steel bars, the length direction of the embedded steel bars is perpendicular to the length directions of the left middle beam, the right middle beam, the left beam and the right beam, and the embedded steel bars are welded to the left bracket or the right bracket.

[0032] An embodiment of the present invention provides a method for the reconstruction of an expansion joint. The method comprises three stages: a preparation stage, an expansion joint reconstruction stage, and a grouting and curing stage, wherein:

[0033] The expansion joint reconstruction stage includes the following steps:

[0034] Step A, dismantling the old expansion joint: dismantling the original expansion joint connecting structural member, and excavating an installation notch with a width of 1.2-1.8 times the overall width of the expansion joint connecting structural member for fixing the building;

[0035] Step B, processing the embedded steel bars: cleaning the dust and debris in the installation slot, removing the attachments and rust on the embedded steel bars, straightening the twisted embedded steel bars, making the ends of the embedded steel bars extend along the width direction of the installation slot, and reinforcing the damaged embedded steel bars;

[0036] Step C, installation of new expansion joint: using a lifting tool to lift the clamping claw to place the expansion joint connection structural member for fixing the building to a predetermined position on the embedded steel bar in the installation notch;

[0037] Step D, reinforcing bar planting operation: drilling holes, cleaning holes, injecting glue, and planting steel bars on the side walls of the installation slot to obtain longitudinal limiting bars extending along the width direction of the installation slot;

[0038] Step E, steel bar welding operation: Weld a plurality of transverse limiting bars parallel to the length directions of the left intermediate beam, the right intermediate beam, the left side beam, and the right side beam on the longitudinal limiting bar, weld the transverse limiting bars to the tops of the left limiting guide box and the right limiting guide box, and then saw off the clamping claws.

[0039] Optionally, the diameter and depth of the drilled hole in step D are set according to the following formula:

[0040] D = d + δ; H = γ×d;

[0041] In the formula: D is the drilled hole diameter for the steel bar implanting operation, unit: mm;

[0042] H is the drilled hole depth for the steel bar implanting operation, unit: mm;

[0043] d is the nominal diameter of the implanted steel bar, mm;

[0044] δ is the redundancy required for the steel bar implanting operation, with a value of 4 - 10, unit: mm;

[0045] γ is the depth coefficient for the steel bar implanting operation, with a value of 15 - 20.

[0046] Any of the above technical solutions provided by the embodiments of the present invention at least produces the following technical effects:

[0047] The expansion joint connection structure member for fixing a building provided by the present invention, its left limiting guide box and right limiting guide box provide a space for the front sliding bar and the rear sliding bar to expand and contract along the width direction of the expansion joint, and both the front sliding bar and the rear sliding bar are welded to the lower surfaces of the left intermediate beam, the right intermediate beam, the left side beam, and the right side beam. Therefore, the deformations occurring in the left intermediate beam, the right intermediate beam, the left side beam, and the right side beam under the action of thermal expansion and contraction will drive the front sliding bar and the rear sliding bar to expand, contract, and slide synchronously. Under the guiding, protecting, and restricting effects of the left limiting guide box and the right limiting guide box on the front sliding bar and the rear sliding bar, the deformations of the left intermediate beam, the right intermediate beam, the left side beam, and the right side beam are also restricted. And because of being restricted, even if the expansion joint deforms everywhere under the action of thermal expansion and contraction, the widths of the expansion joint everywhere after deformation tend to be consistent. Since the forces on the left intermediate beam, the right intermediate beam, the left side beam, and the right side beam are more uniform everywhere, it is not easy to have welding failure and break away from the embedded steel bars, and the rubber strip is not easy to fall off;

[0048] At the same time, the expansion joint formed by multiple gaps can ensure that the width dimension of each gap is small, the rubber strip can be made thinner, and the anti - impact and anti - rolling capabilities are both stronger. Therefore, the technical problems of poor structural connection reliability and short service life existing in the prior art are solved. Description of the Drawings

[0049] Through the following attached drawings, those skilled in the art can better understand the technical effects of the present invention, where:

[0050] Figure 1 It is a partial schematic diagram of the three-dimensional structure of the expansion joint connection structure member for fixed buildings provided by the embodiment of the present invention when the rubber strip and the bracket connecting steel bars are not installed.

[0051] Figure 2 It is a partial schematic diagram of the three-dimensional structure of the expansion joint connection structure member for fixed buildings provided by the embodiment of the present invention when the rubber strip is installed but the bracket connecting steel bars are not installed.

[0052] Figure 3 It is a partial schematic diagram of the expansion joint connection structure member for fixed buildings provided by the embodiment of the present invention after being installed in the installation notch of the fixed building.

[0053] Figure 4 It is a partial schematic diagram of the installation notch of the fixed building where the expansion joint connection structure member for fixed buildings provided by the embodiment of the present invention is installed.

[0054] Figure 5 It is a schematic flow chart of the construction method for the expansion joint transformation provided by the preferred embodiment of the present invention.

[0055] Figure 6 It is a partial schematic diagram of the three-dimensional structure of the expansion joint connection structure member for fixed buildings provided by the preferred embodiment of the present invention when the rubber strip and the bracket connecting steel bars are not installed.

[0056] Figure 7 It is a schematic diagram of the connection relationship between the parts of the front sliding rod and the rear sliding rod of the expansion joint connection structure member for fixed buildings provided by the preferred embodiment of the present invention embedded in the left limit guiding box and the right limit guiding box and the support bolts.

[0057] Markings in the figure: 1, left middle beam; 2, right middle beam; 3, left side beam; 4, right side beam; 341, top edge; 342, side edge; 343, bottom edge; 5, front sliding rod; 6, rear sliding rod; 7, left limit guiding box; 71, top cover; 72, mounting hole; 73, front longitudinal limit bolt; 74, bottom box body; 741, bottom surface of the bottom box body; 742, buffer spring; 743, limit post; 744, support bolt; 745, support plate; 746, guiding ring; 75, front transverse limit bolt; 76, rear transverse limit bolt; 77, inner guiding partition; 78, rear longitudinal limit bolt; 79, outer limit partition; 8, right limit guiding box; 9, convex column; 10, claw; 11, rubber strip; 12, left bracket; 13, right bracket; 14, anti-slip groove; 15, mounting notch; 16, concrete filling surface; 17, embedded steel bar; 18, longitudinal limit rib; 19, transverse limit rib. Detailed implementation manners

[0058] The following combines the above attachments Figures 1 - 7 to more specifically illustrate the preferred implementation manners provided by the embodiments of the present invention and many optional implementation schemes.

[0059] As Figures 1 - 7 shown, a telescopic joint connection structure member for fixing a building provided by an embodiment of the present invention includes a left middle beam 1, a right middle beam 2, a left side beam 3, a right side beam 4, a front sliding rod 5, a rear sliding rod 6, a left limit guiding box 7, a right limit guiding box 8, a convex column 9, a claw 10 and a rubber strip 11, wherein:

[0060] The length directions of the left middle beam 1, the right middle beam 2, the left side beam 3 and the right side beam 4 are parallel to each other, and the left middle beam 1 and the right middle beam 2 are located between the left side beam 3 and the right side beam 4; there are gaps between the left middle beam 1 and the right middle beam 2, between the left side beam 3 and the left middle beam 1, and between the right side beam 4 and the right middle beam 2, and these gaps form telescopic joints, and the rubber strip 11 is embedded in the telescopic joints;

[0061] The claw 10 is in an n shape and the claw 10 is sleeved outside the left side beam 3 and the right side beam 4 and welded to the left side beam 3 and the right side beam 4, and there is a gap between the claw 10 and the left middle beam 1 and the right middle beam 2;

[0062] A plurality of left limit guide boxes 7 are welded to the outer side of the left middle beam 1, and a plurality of right limit guide boxes 8 are welded to the outer side of the right middle beam 2; both the front slide bar 5 and the rear slide bar 6 are welded to the lower surfaces of the left middle beam 1, the right middle beam 2, the left side beam 3, and the right side beam 4; the length directions of both the front slide bar 5 and the rear slide bar 6 are perpendicular to the length directions of the left middle beam 1, the right middle beam 2, the left side beam 3, and the right side beam 4; both ends of the front slide bar 5 and the rear slide bar 6 in the length direction are inserted into the left limit guide box 7 and the right limit guide box 8 respectively, and there are gaps between the two ends and the inner walls of the left limit guide box 7 and the right limit guide box 8; both the left limit guide box 7 and the right limit guide box 8 are of a cube structure, and a plurality of convex columns 9 with the same length dimension are fixedly arranged on the bottom surfaces of the two and the outer walls perpendicular to the left side beam 3 and the right side beam 4 respectively.

[0063] For the expansion joint connection structure member for fixing buildings provided by the present invention, the left limit guide box 7 and the right limit guide box 8 provide a space for the front slide bar 5 and the rear slide bar 6 to expand and contract along the width direction of the expansion joint. Since both the front slide bar 5 and the rear slide bar 6 are welded to the lower surfaces of the left middle beam 1, the right middle beam 2, the left side beam 3, and the right side beam 4, the deformations of the left middle beam 1, the right middle beam 2, the left side beam 3, and the right side beam 4 caused by thermal expansion and contraction will drive the front slide bar 5 and the rear slide bar 6 to expand, contract, and slide synchronously. Under the guiding, protecting, and restricting effects of the left limit guide box 7 and the right limit guide box 8 on the front slide bar 5 and the rear slide bar 6, the deformations of the left middle beam 1, the right middle beam 2, the left side beam 3, and the right side beam 4 are also restricted. And because of the restriction, even if the expansion joint deforms under the action of thermal expansion and contraction, the widths of the expansion joint at various places after deformation tend to be consistent. Since the forces on the left middle beam 1, the right middle beam 2, the left side beam 3, and the right side beam 4 at various places are more uniform, it is not easy to have welding failure and break away from the embedded steel bars 17, and the rubber strip 11 is not easy to fall off.

[0064] At the same time, the expansion joints formed by multiple gaps can ensure that the width dimension of each gap is small, and the rubber strip 11 can be made thinner, and the anti-impact and anti-rolling capabilities are stronger.

[0065] As an optional implementation manner, the expansion joint connection structure member for fixing buildings in this embodiment further includes a left bracket 12 and a right bracket 13, where: both the left bracket 12 and the right bracket 13 are right triangle structures with a relatively large ratio of the base to the waist length, and the two are respectively fixed to the left side beam 3 and the right side beam 4 through connecting plates. At the same time, a bracket connecting steel bar is penetrated inside the two, and the length direction of the bracket connecting steel bar is parallel to the length directions of the left middle beam 1, the right middle beam 2, the left side beam 3, and the right side beam 4.

[0066] The convex post 9 includes a cylindrical portion and a circular plate-shaped convex post head integrally connected to the cylindrical portion. The cylindrical portion is connected to the outer wall of the left limit guide box 7 or the right limit guide box 8. The middle of the convex post head is connected to the cylindrical portion and the outer diameter of the convex post head is greater than that of the cylindrical portion.

[0067] On the one hand, the left bracket 12 and the right bracket 13 play the role of a connection medium between the left side beam 3 and the right side beam 4 and the embedded steel bars 17 of the installation notch 15. At the same time, the large internal space of the left bracket 12 and the right bracket 13 is conducive to welding and setting the bracket connecting steel bars extending horizontally. On the other hand, they have a certain shock absorption and buffering effect on the impact force borne by the left side beam 3 and the right side beam 4, ensuring the connection reliability and service life of the present invention.

[0068] As an optional implementation manner, the gap sizes between adjacent convex posts 9 in this embodiment are the same. This structure is relatively regular, facilitating the implementation of manufacturing and connection operations.

[0069] As an optionally implemented manner, in this embodiment, both the front sliding rod 5 and the rear sliding rod 6 are rectangular parallelepiped-shaped hollow structures. Each of the left limit guiding box and the right limit guiding box includes a bottom box body 74, a guiding frame located inside the bottom box body 74, a transverse limit bolt, a longitudinal limit bolt, and a top cover 71. A plurality of mounting holes 72 are provided at the edge of the top cover 71, and screw holes with the same number as the mounting holes 72 are provided at the top of the side wall of the bottom box body 74. A plurality of connecting screws passing through the mounting holes and threadedly connected to the screw holes detachably connect the top cover 71 and the bottom box body 74 together, and the tops of the connecting screws are flush with the top surface of the top cover 71. The guiding frame is welded and fixed inside the bottom box body 74; the transverse limit bolts include a front transverse limit bolt 75 and a rear transverse limit bolt 76, and the longitudinal limit bolts include a front longitudinal limit bolt 73 and a rear longitudinal limit bolt 78. The guiding frame is in a square shape and includes an inner guiding partition 77, an outer limit partition 79, a front side limit partition, and a rear side limit partition. Both ends of the front sliding rod 5 and the rear sliding rod 6 in their respective length directions respectively penetrate through the guiding through holes on the inner guiding partition 77 of the guiding frames of the left limit guiding box 7 and the right limit guiding box 8. The screw rod parts of both the front transverse limit bolt 75 and the rear transverse limit bolt 76 are threadedly connected to the outer limit partition 79, and the bolt heads of both are facing the ends where the front sliding rod 5 and the rear sliding rod 6 penetrate through the guiding through holes. The screw rod part of the front longitudinal limit bolt 73 is threadedly connected to the front side limit partition, and the bolt head of the front longitudinal limit bolt 73 is facing the end where the front sliding rod 5 penetrates through the guiding through hole. The screw rod part of the rear longitudinal limit bolt 78 is threadedly connected to the rear side limit partition, and the bolt head of the rear longitudinal limit bolt 78 is facing the end where the rear sliding rod 6 penetrates through the guiding through hole. Twisting the front transverse limit bolt 75, the rear transverse limit bolt 76, the front longitudinal limit bolt 73, and the rear longitudinal limit bolt 78 can twist their respective bolt heads to a position where they abut against the ends where the front sliding rod 5 and the rear sliding rod 6 penetrate through the guiding through holes in their respective length directions.

[0070] In the initial state, there is enough clearance between the transverse limit bolts, the longitudinal limit bolts and the front sliding rod 5 and the rear sliding rod 6 to ensure that the front sliding rod 5 and the rear sliding rod 6 have enough telescopic space along the width direction of the expansion joint. If the deformation of the expansion joint exceeds the ideal size after being used for a period of time, the top cover 71 can be disassembled, and the transverse limit bolts and the longitudinal limit bolts can be twisted. The bolt heads of the transverse limit bolts and the longitudinal limit bolts apply abutting forces to the front sliding rod 5 and the rear sliding rod 6 respectively from the transverse and longitudinal directions to adjust the positions of the front sliding rod 5 and the rear sliding rod 6, and the size of the expansion joint can be adjusted by adjusting the positions of the front sliding rod 5 and the rear sliding rod 6, so as to ensure that the expansion joint always conforms to the ideal size.

[0071] As an optional implementation manner, in this embodiment, a plurality of buffer springs 742 and guide rings 746 with the same number as the buffer springs 742 are fixedly arranged on the part of the bottom surface 741 of the bottom box body 74 located inside the inner guide partition 77. The buffer springs 742 are located inside the guide rings 746 and support members are inserted into the buffer springs 742. The support members include a support plate 745 and a limit post 743. One end of the limit post 743 is inserted into the central hole of the buffer spring 742 and there is a gap between this end and the bottom surface of the bottom box body 74. The other end of the limit post 743 is fixedly connected to the support plate 745. The support plate 745 is disc-shaped and is slidably connected to the inner wall of the guide ring 746. A plurality of support bolts 744 are threadedly connected to the edge of the support plate 745. The bolt heads of the support bolts 744 abut against the front sliding rod 5 and the rear sliding rod 6, and the front sliding rod 5 and the rear sliding rod 6 can slide relative to the bolt heads of the support bolts 744.

[0072] The buffer springs 742 can have a certain shock absorption and buffering effect on the front sliding rod 5 and the rear sliding rod 6, thereby ensuring that the expansion joint has a certain elastic expansion force. When the heights of the front sliding rod 5 and the rear sliding rod 6 in the vertical direction are too low, the height position can be adjusted by twisting the support bolts 744, so as to ensure that both the front sliding rod 5 and the rear sliding rod 6, as well as the left intermediate beam 1, the right intermediate beam 2, the left side beam 3, and the right side beam 4, all have accurate height positions.

[0073] As an optional implementation manner, in this embodiment, the convex columns 9 are evenly distributed on the bottom surfaces of the left limit guide box 7 and the left limit guide box 7 respectively, and on the outer wall surfaces perpendicular to the left side beam 3 and the right side beam 4 of the two. This design is beneficial to the uniform force on each part of the left limit guide box 7 and the left limit guide box 7 where the convex columns 9 are provided.

[0074] As an optional implementation manner, in this embodiment, the gaps between the left intermediate beam 1 and the right intermediate beam 2, the gap between the left side beam 3 and the left intermediate beam 1, and the gap between the right side beam 4 and the right intermediate beam 2 are the same in size, and the sum △L of the sizes of the three satisfies the following formula:

[0075] △L = α × (△L1 + △L2)

[0076] △L1 = β × L × (Tmax - To)

[0077] △L2 = β × L × (To - Tmin)

[0078] In the formula: α is the expansion experience coefficient of the fixed building, and its value is 0.4 - 0.5 (preferably taking the intermediate value);

[0079] △L1 is the elongation caused by the temperature rising to the local highest temperature, and the unit is: mm;

[0080] △L2 is the shortening caused by the temperature drop to the local minimum temperature, with the unit of: mm;

[0081] β is the coefficient of thermal expansion of the material of the structural member connected by the expansion joint for the fixed building, and its value is 10×10 -6 ~12×10 -6 (preferably taking the intermediate value); for concrete, β is 10×10 -6 , and for steel structure, β is 12×10 -6 ;

[0082] L is the sum of the distances from the neutral point of deformation of the fixed building to the expansion joint, with the unit of: mm;

[0083] Tmax—the local maximum effective air temperature value, with the unit of: °C;

[0084] Tmin—the local minimum effective air temperature value, with the unit of: °C;

[0085] To—the air temperature value during installation.

[0086] The expansion joint size obtained from the above formula can meet the needs of the deformation of the fixed building during thermal expansion and contraction, and ensure the overall structural strength of the fixed building.

[0087] As an optional implementation manner, in this embodiment, anti-slip grooves 14 extending along the entire length direction are provided in the middle of the top surfaces of the left middle beam 1 and the right middle beam 2 respectively. The function of the anti-slip grooves 14 is to increase the friction of the left middle beam 1 and the right middle beam 2. When the fixed building is a bridge, the anti-slip grooves 14 on the left middle beam 1 and the right middle beam 2 can prevent the passing vehicles from slipping and causing traffic accidents.

[0088] As an optional implementation manner, in this embodiment, each of the left side beam 3 and the right side beam 4 includes a top edge 341, a side edge 342 and a bottom edge 343 that are connected in sequence as a whole. The width dimension of the bottom edge 343 is greater than that of the top edge 341, and the bottom edge 343 is welded and fixed to the left limit guide box 7 or the right limit guide box 8. This structure forms a structure with a wide bottom edge 343 and a narrow top edge 341. Since the bottom edge 343 has a larger bearing area, the overall stability and structural strength are more ideal.

[0089] A fixed building provided by an embodiment of the present invention includes an installation notch 15 and the above-mentioned structural members for connecting the expansion joint of the fixed building (the fixed building can be a bridge or a road) provided by the embodiment of the present invention and installed on the installation notch 15. An outwardly protruding embedded steel bar 17 is fixedly provided on the side wall or bottom surface of the installation notch 15. The length direction of the embedded steel bar 17 is perpendicular to the length directions of the left middle beam 1, the right middle beam 2, the left side beam 3 and the right side beam 4, and the embedded steel bar 17 is welded and connected to the left bracket 12 or the right bracket 13.

[0090] The present invention is suitable for replacing the original expansion joint connection structural components of a fixed building. The embedded steel bars 17 are the original steel bars of the fixed building. Using the original steel bars is beneficial to saving resources and saving construction time.

[0091] An embodiment of the present invention provides a method for the reconstruction of an expansion joint. The method comprises three stages: a preparation stage, an expansion joint reconstruction stage, and a grouting and curing stage, wherein:

[0092] The expansion joint renovation phase includes the following steps:

[0093] Step A, dismantling of old expansion joints: dismantling the original expansion joint connecting structural components, and excavating an installation notch 15 with a width of 1.2-1.8 times the overall width of the expansion joint connecting structural components for fixed buildings;

[0094] Step B, processing the embedded steel bars 17: cleaning the dust and debris in the installation slot 15, removing the attachments and rust on the embedded steel bars 17, straightening the twisted embedded steel bars 17, making the ends of the embedded steel bars 17 extend along the width direction of the installation slot 15, and reinforcing the damaged embedded steel bars 17;

[0095] Step C, installation of new expansion joint: using a lifting tool through a lifting claw 10 to place the fixed building expansion joint connection structural member into a predetermined position on the embedded steel bar 17 in the installation notch 15;

[0096] Step D, reinforcing bar planting operation: drilling holes, cleaning holes, injecting glue, and planting steel bars on the side walls of the installation slot 15 to obtain longitudinal limiting bars 18 extending along the width direction of the installation slot 15;

[0097] Step E, steel bar welding operation: weld a plurality of transverse limiting ribs 19 parallel to the length direction of the left middle beam 1, the right middle beam 2, the left beam 3 and the right beam 4 on the longitudinal limiting ribs 18, weld the transverse limiting ribs 19 to the top of the left limiting guide box 7 and the right limiting guide box 8, and saw off the claws 10.

[0098] As an optional implementation, the diameter and depth of the drill hole in step D of this embodiment are set according to the following formula: D=d+δ; H=γ×d; where: D is the drill hole diameter for the steel bar planting operation, unit: mm;

[0099] H is the drilling depth for reinforcing bar embedding operation, unit: mm;

[0100] d is the nominal diameter of the embedded steel bar, mm;

[0101] δ is the redundancy required for the steel bar planting operation, with a value of 4 - 10 (preferably taking the middle value), and the unit is: mm; γ is the depth coefficient of the steel bar planting operation, with a value of 15 - 20 (preferably taking the middle value).

[0102] When selecting the drilling hole diameter for steel bar planting, it is necessary to ensure that the hole diameter is slightly larger than the steel bar diameter to ensure that the planting adhesive can fully fill the hole and tightly wrap the steel bar, while providing sufficient bonding force.

[0103] During the steel bar planting construction process, after the construction personnel determine the position according to the drawing, they carry out drilling. Generally, an impact electric hammer or a water drill is used to form the hole, and a suitable drilling bit is selected. The diameter of the drilling bit is generally slightly larger than the diameter of the steel bar. Both the drilling diameter and the drilling depth need to ensure that the planted steel bar reaches the yield point until it is pulled off. If the hole diameter is too small, the amount of planting adhesive poured will be very small, and the bonding strength cannot meet the requirements, and it cannot pass the later pull-out test. A large hole diameter does not mean that the more planting adhesive, the better the bonding force. In actual projects, the elastic modulus of the binder is small, and too large a hole diameter will lead to an increase in the slip of the structural system. This will not only increase the amount of planting adhesive and the drilling difficulty, waste reinforcement materials, increase the project cost, but also significantly reduce the strength of the original structure and cause greater damage.

[0104] Considering multiple factors such as the change of the planting adhesive under long-term load, the construction difficulty and economy of steel bar planting, and combining numerical simulation research and a number of construction site experiences, the key parameters of the drilling diameter and the drilling depth can be set according to the above formula.

[0105] The above technical solutions are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A structural member connected by an expansion joint for a fixed building, characterized in that: It includes a left middle beam, a right middle beam, a left beam, a right beam, a front slide bar, a rear slide bar, a left limit guide box, a right limit guide box, a boss, a claw and a rubber strip, wherein: The length directions of the left middle beam, the right middle beam, the left side beam and the right side beam are parallel to each other, and the left middle beam and the right middle beam are located between the left side beam and the right side beam; there are gaps between the left middle beam and the right middle beam, between the left side beam and the left middle beam, and between the right side beam and the right middle beam, and the gaps form expansion joints, and the rubber strips are embedded in the expansion joints; The clamping claw is in an n-shape and is clamped on the outside of the left beam and the right beam and welded to the left beam and the right beam, and there is a gap between the clamping claw and the left middle beam and the right middle beam; Several left limit guide boxes are welded on the outside of the left middle beam, and several right limit guide boxes are welded on the outside of the right middle beam; the front sliding bar and the rear sliding bar are both welded on the lower surfaces of the left middle beam, the right middle beam, the left beam and the right beam; the length directions of the front sliding bar and the rear sliding bar are perpendicular to the length directions of the left middle beam, the right middle beam, the left beam and the right beam; the two ends of the front sliding bar and the rear sliding bar in the length direction are respectively inserted into the left limit guide box and the right limit guide box, and there are gaps between the two ends and the inner walls of the left limit guide box and the right limit guide box; the left limit guide box and the right limit guide box are both cubic structures, and several convex columns with the same length are fixedly arranged on their respective bottom surfaces and their respective outer wall surfaces perpendicular to the left beam and the right beam.

2. The expansion joint connection structural member for fixing buildings according to claim 1, characterized in that: The fixed building expansion joint connection structural member further comprises a left bracket and a right bracket, wherein: The left bracket and the right bracket are both right triangle structures with a base having a larger size than the waist length, and are respectively fixed to the left beam and the right beam through a connecting plate, and bracket connecting steel bars are provided inside the two brackets, and the length direction of the bracket connecting steel bars is parallel to the length directions of the left middle beam, the right middle beam, the left beam and the right beam; The boss includes a cylindrical portion and a circular plate-shaped boss head integrally connected to the cylindrical portion, the cylindrical portion is connected to the outer wall of the left limit guide box or the right limit guide box, the middle portion of the boss head is connected to the cylindrical portion and the outer diameter of the boss head is larger than the cylindrical portion.

3. The expansion joint connection structural member for fixing buildings according to claim 2, characterized in that: The gaps between adjacent protrusions are of the same size; and / or, the front sliding bar and the rear sliding bar are both rectangular hollow structures, the left limit guide box and the right limit guide box each comprise a bottom box body, a guide frame located in the bottom box body, a transverse limit bolt, a longitudinal limit bolt and a top cover, a plurality of mounting holes are arranged at the edge of the top cover, a number of screw holes corresponding to the mounting holes are arranged on the top of the side wall of the bottom box body, a number of connecting screws that penetrate the mounting holes and are threadedly connected to the screw holes connect the top cover to the bottom box body detachably, and the top of the connecting screw is flush with the top surface of the top cover, and the guide frame is welded and fixed to the bottom box body; the transverse limit bolt comprises a front transverse limit bolt and a rear transverse limit bolt, the longitudinal limit bolt comprises a front longitudinal limit bolt and a rear longitudinal limit bolt, the guide frame is in a square frame shape and comprises an inner guide partition, an outer limit partition, a front limit partition and a rear limit partition, the front sliding bar and the rear sliding bar The two ends of each length direction respectively pass through the guide through holes on the inner guide partitions of the guide frames of the left limit guide box and the right limit guide box, respectively, and the screw parts of the front transverse limit bolt and the rear transverse limit bolt are threadedly connected to the outer limit partition, and the respective bolt heads of the two are facing the ends of the front sliding bar and the rear sliding bar respectively passing through the guide through holes. The screw parts of the front longitudinal limit bolt are threadedly connected to the front side limit partition, and the bolt heads of the front longitudinal limit bolt are facing the ends of the front sliding bar and the rear sliding bar respectively passing through the guide through holes. The front transverse limit bolt, the rear transverse limit bolt, the front longitudinal limit bolt, and the rear longitudinal limit bolt can be twisted to a position where their respective bolt heads are abutted against the ends of the front sliding bar and the rear sliding bar respectively passing through the guide through holes in the length directions.

4. The expansion joint connection structural member for fixing buildings according to claim 3, characterized in that: The convex columns are evenly distributed on the bottom surfaces of the left limit guide box and the right limit guide box and on the outer wall surfaces of the two that are perpendicular to the left beam and the right beam; and / or, the bottom surface of the bottom box body is located on the inner side of the inner guide partition and is fixedly provided with a plurality of buffer springs and a guide ring with the same number of buffer springs, the buffer spring is located in the guide ring and the buffer spring is inserted with a support member, the support member includes a support plate and a limit column, one end of the limit column is inserted in the center hole of the buffer spring and there is a gap between the end and the bottom surface of the bottom box body, the other end of the limit column is fixedly connected to the support plate, the support plate is disc-shaped and is slidably connected to the inner wall of the guide ring, and a plurality of support bolts are threadedly connected at the edge of the support plate, the bolt heads of the support bolts abut against the front sliding rod and the rear sliding rod, and the front sliding rod and the rear sliding rod can slide relative to the bolt heads of the support bolts.

5. The expansion joint connection structural member for fixing buildings according to claim 2, characterized in that: The gap between the left middle beam and the right middle beam, the gap between the left beam and the left middle beam, and the gap between the right beam and the right middle beam are of the same size, and the sum of the sizes ΔL satisfies the following formula: △L=α×(△L1+△L2) △L1=β×L×(Tmax-To) △L2=β×L×(To-Tmin) Where: α is the fixed building expansion coefficient, and its value is 0.4~0.5; △L1 is the elongation caused by the temperature rising to the local maximum temperature, unit: mm; △L2 is the shortening caused by the temperature drop to the local minimum temperature, unit: mm; β is the thermal expansion coefficient of the material used to connect the structural components of the expansion joints used to fix the building, and its value is 10×10 -6 ~12×10 -6 ; L is the sum of the distances from the deformation neutral point of the fixed building to the expansion joint, in mm; Tmax—the maximum effective local temperature, in degrees Celsius; Tmin—Local minimum effective temperature value, unit: ℃; To—Air temperature value at installation time.

6. The expansion joint connection structural member for fixing buildings according to claim 2, characterized in that: The middle part of the top surface of each of the left middle beam and the right middle beam is provided with an anti-slip groove extending along the entire length direction thereof.

7. The expansion joint connection structural member for fixing buildings according to claim 2, characterized in that: The left beam and the right beam each include a top edge, a side edge and a bottom edge which are connected in sequence as one body, the width of the bottom edge is larger than that of the top edge, and the bottom edge is welded and fixed to the left limit guide box or the right limit guide box.

8. A fixed building, characterized in that: It comprises an installation slot and a structural member for fixing expansion joints for buildings as described in any one of claims 2 to 7 installed on the installation slot, wherein the side wall or the bottom surface of the installation slot is fixedly provided with protruding embedded steel bars, the length direction of the embedded steel bars is perpendicular to the length directions of the left middle beam, the right middle beam, the left beam and the right beam, and the embedded steel bars are welded to the left bracket or the right bracket.

9. A method for reconstruction of expansion joints, characterized in that: The three stages of this method are: preparation stage, expansion joint reconstruction stage and grouting maintenance stage, among which: The expansion joint reconstruction stage includes the following steps: Step A, dismantling the old expansion joint: dismantling the original expansion joint connecting structural member, and excavating an installation notch with a width of 1.2-1.8 times the overall width of the expansion joint connecting structural member for fixing a building according to any one of claims 1-7; Step B, processing the embedded steel bars: cleaning the dust and debris in the installation slot, removing the attachments and rust on the embedded steel bars, straightening the twisted embedded steel bars, making the ends of the embedded steel bars extend along the width direction of the installation slot, and reinforcing the damaged embedded steel bars; Step C, installation of new expansion joint: using a lifting tool to lift the clamping claw to place the expansion joint connection structural member for fixing the building to a predetermined position on the embedded steel bar in the installation notch; Step D, reinforcing bar planting operation: drilling holes, cleaning holes, injecting glue, and planting steel bars on the side walls of the installation slot to obtain longitudinal limiting bars extending along the width direction of the installation slot; Step E, steel bar welding operation: weld a plurality of transverse limiting ribs parallel to the length directions of the left middle beam, the right middle beam, the left beam and the right beam on the longitudinal limiting ribs, weld the transverse limiting ribs to the tops of the left limiting guide box and the right limiting guide box, and then saw off the clamping claws.

10. The expansion joint reconstruction construction method according to claim 9, characterized in that: The diameter and depth of the drilled hole in step D are set according to the following formula: D = d + δ; H = γ × d; Where: D is the diameter of the drill hole for reinforcing bar planting operation, unit: mm; H is the drilling depth for reinforcing bar embedding operation, unit: mm; d is the nominal diameter of the embedded steel bar, mm; δ is the redundancy required for the steel bar planting operation, with a value of 4~10, in units of mm; γ is the reinforcement embedding operation depth coefficient, and its value is 15~20.

Images