Tie bar arch type large-span first-aid repair beam

Abstract

The utility model relates to a tie bar arch type large-span first-aid repair beam. The first-aid repair beam comprises two groups of main arch structures which are horizontally and symmetrically arranged, a plurality of cross beams which are connected with the two groups of main arch structures, and a bridge deck system which is arranged between the two main arch structures, the main arch structure comprises an arch rib, a telescopic straining beam, a plurality of suspenders and inhaul cables. The arch rib comprises two arch rib end joints, a plurality of arch rib standard joints and a plurality of span adjusting wedge blocks matched with the arch rib end joints and the arch rib standard joints. The arch rib standard knots and the arch rib end knots are single components with fixed lengths respectively, the span adjusting wedge blocks are series components adaptive to different spans, the arch ribs adaptive to different spans can be assembled by adjusting the number of the arch rib standard knots and assembling the span adjusting wedge blocks with corresponding angles, the two ends of the inhaul cable are connected with the two ends of the arch ribs respectively, and the inhaul cable is connected with the arch ribs. And the arch rib is rapidly formed by tensioning the inhaul cable.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge emergency repair, in particular to a tie-rod arch-type large-span emergency repair beam. Background Art

[0002] There are many highway and railway bridges in my country, which are widely distributed and account for a large proportion. They may be damaged in natural disasters and are also the enemy's key targets in wartime. Rapid repair of damaged bridges is a key research topic in the field of transportation emergency support. The applicable span of existing bridge repair equipment is limited. The maximum applicable span of railway emergency repair steel beams is 80m, and the maximum applicable span of highway emergency steel bridges is 66m. The technical standards of existing bridge repair equipment are low, the types of rods are many, the assembly and erection time is long, and the speed of traffic is slow. Its technical and tactical indicators, repair techniques and methods can no longer fully meet the needs of modern bridge repair. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a tie-rod arch-type large-span emergency repair beam and an erection method thereof, so as to solve the technical problems of insufficient span and slow assembly and erection speed of existing emergency repair beams, and at the same time improve the speed of opening the emergency repair beams.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] A tie-rod arch type large-span emergency repair beam, the key technology of which is: it comprises two sets of horizontally symmetrically arranged main arch structures, a plurality of cross beams connecting the two sets of main arch structures, and a bridge deck system arranged between the two main arch structures;

[0006] The main arch structure includes arch ribs, retractable tie beams, a number of hangers and cables;

[0007] The arch rib comprises two arch rib end sections, m arch rib standard sections and m+1 span adjustment wedges, the intersection of the center lines of the arch rib end sections and the arch rib standard sections is located on the same arc, so that the arch axis is inscribed in a circular curve, wherein m is a positive integer;

[0008] The arch rib end section and the arch rib standard section, as well as two adjacent arch rib standard sections, are hinged via a top corner portion, and the arch rib end section and the span-adjusting wedge block, as well as the arch rib standard section and the span-adjusting wedge block, are connected via flanges;

[0009] The arch rib standard section and arch rib end section are single components with fixed lengths, and the span-adjusting wedges are a series of components adapted to different spans. By adjusting the number of arch rib standard sections and assembling span-adjusting wedges of corresponding angles, arch ribs adapted to different spans can be assembled. The two ends of the cable are respectively connected to the two ends of the arch rib, and the arch rib is quickly formed by tensioning the cable.

[0010] As an implementation mode of the utility model, the standard section of the arch rib is in a straight line, its cross section is a thin-walled tubular structure, and its elevation is an isosceles trapezoid.

[0011] As an implementation mode of the utility model, the inner angle of the isosceles trapezoid of the standard section elevation of the arch rib is determined according to the minimum span applicable to the emergency repair beam.

[0012] As an embodiment of the utility model, two sets of second connecting ear plates are respectively provided at both ends of the top surface of the arch rib standard section, which are used to connect adjacent arch rib standard sections or arch rib end sections, and each set of the second connecting ear plates includes a single ear plate and a double ear plate, and the two sets of second connecting ear plates are symmetrically arranged about the top center of the arch rib standard section, so that the arch rib standard section can be turned around for use;

[0013] A set of first connecting ear plates is provided on the top surface of one end of the arch rib end section butting against the arch rib standard section. The first connecting ear plates include a single-ear plate and a double-ear plate. The first connecting ear plates are matched with the second connecting ear plates.

[0014] As an implementation mode of the utility model, the arch rib end section is linear, and its cross section is a thin-walled tubular structure. One end of the facade is an inclined surface adapted to the end surface of the arch rib standard section, and the inner angle of the inclined surface is the same as the inner angle of the isosceles trapezoid of the arch rib standard section; the other end of the arch rib end section facade is semicircular and is used to connect to the end of the tie beam.

[0015] As an implementation mode of the utility model, a plurality of suspension rod connecting ear plates are arranged at intervals on the bottom surfaces of the arch rib standard section and the arch rib end section, and the upper ends of the suspension rods are connected to the suspension rod connecting ear plates.

[0016] As an implementation mode of the utility model, the elevation of the span-adjusting wedge block is triangular, and the vertex angle of the triangle is designed to be different according to different emergency repair spans.

[0017] As an embodiment of the utility model, the tie beam includes two retractable tie beam components, the retractable tie beam components include more than two tubular structures, the tubular structures are nested with each other, one end of the outermost tubular structure is provided with a connecting flange for connecting with another retractable tie beam structure through a flange; one end of the innermost tubular structure is provided with a tie beam connecting ear plate for connecting with the end of the arch rib; the tie beam can adapt to the needs of different emergency repair spans by adjusting the length of the retractable tie beam component.

[0018] As an implementation mode of the utility model, the cross beam includes an end cross beam, a middle cross beam and an upper cross brace, all of which are two-section telescopic sleeve structures, and the cross section is a box-shaped section. By adjusting the overlapping length of the inner and outer telescopic sleeves, the emergency repair beam can adapt to the emergency repair needs of bridges of different widths;

[0019] The end cross beam is located at the end of the tie beam, and both ends are connected to the tie beam respectively;

[0020] Both ends of the middle cross beam are respectively connected to tie beams and arranged at intervals along the longitudinal direction of the bridge span;

[0021] The two ends of the upper cross brace are respectively connected to the flanges on the side of the arch rib standard section and are arranged at intervals on the top of the arch rib.

[0022] As an implementation mode of the utility model, after the emergency repair beam is temporarily opened to traffic, concrete is poured into the standard section of the arch rib, the end section of the arch rib and the inside of the tie beam, so that the arch rib and the tie beam of the emergency repair beam become a steel tube concrete structure, thereby increasing the bearing capacity and rigidity of the emergency repair beam, thereby converting the temporary emergency repair beam into a permanent bridge.

[0023] The beneficial effects of adopting the above technical solution are:

[0024] As a modern bridge type, the tied arch bridge has been widely used in road and railway bridges in recent years, but it is rarely used in the field of emergency repair. The utility model introduces the tied arch bridge type into the field of emergency repair, and adopts arch ribs composed of arch rib end sections, arch rib standard sections and span-adjusting wedges to make the arch axis present an inscribed broken line shape of a circular curve. By adjusting the number of arch rib standard sections and assembling span-adjusting wedges with corresponding angles, arch ribs suitable for different spans can be assembled, solving the emergency repair problem of large-span bridges with a span of 48-120m.

[0025] Since the mid-span height of the tied arch increases with the span, the axial force of the arch rib does not change much; the use of a broken-line arch axis inscribed in a circular curve makes the bridge span and arch rib length change proportionally, making it possible to design the arch rib into a standard arch rib section with a fixed length, which is in line with the design principles of emergency repair equipment. The standard arch rib section and the end arch rib section are single components with a fixed length, and the span adjustment wedge is a series of components adapted to different spans, which not only makes the emergency repair beam suitable for emergency repairs of different spans, but also reduces the types of components, making it easier to transport and assemble.

[0026] The tied arch bridge has a large rise in the middle, and the arch ribs mainly bear the pressure, which can greatly reduce the amount of steel used and is particularly suitable for emergency repairs of large-span bridges.

[0027] The end building height of the tied arch bridge is small, which can adapt to the emergency repair of the tunnel entrance bridge.

[0028] By tensioning the cables, the arch ribs of the tie arch can be quickly formed, greatly improving the assembly speed of the repair beam. At the same time, the cables can share part of the axial force borne by the tie beam. By setting up retractable end beams, middle beams and upper cross braces, the repair needs of bridges of different widths can be met.

[0029] Since the arch rib is under compression, there is no problem of gaps in the bolt-eliminating holes caused by the tension connections of other emergency repair beams, which can effectively improve the stiffness of the emergency repair beam and increase the speed of the emergency repair beam in opening to traffic.

[0030] By pouring concrete into the arch ribs and tie rods, they are converted into steel tube concrete structures, which improve the bearing capacity and stiffness of the emergency repair beams so that they meet the use requirements of permanent bridges, realize the temporary-permanent structure conversion of the emergency repair beams, and avoid the secondary replacement of the emergency repair bridges. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the emergency repair beam of the utility model.

[0032] Figure 2 It is a structural diagram of the standard section of the arch rib and the span-adjusting wedge.

[0033] Figure 3 It is a structural diagram of the arch rib end section.

[0034] Figure 4 It is a structural schematic diagram of a telescopic tie beam member.

[0035] Figure 5 yes Figure 1 A local enlarged schematic diagram of point A in the middle.

[0036] Figure 6 It is a schematic diagram of step 1 of the emergency repair beam erection process of the utility model.

[0037] Figure 7 It is a schematic diagram of step 2 of the emergency repair beam erection process of the utility model.

[0038] Figure 8 It is a schematic diagram of step 1 of the emergency repair beam erection process of the utility model.

[0039] Fig. 9 It is a schematic diagram of step 2 of the emergency repair beam erection process of the utility model.

[0040] Fig.10 It is a schematic diagram of step 3 of the emergency repair beam erection process of the utility model.

[0041] Fig.11 It is a schematic diagram of steps 4 to 5 of the emergency repair beam erection process of the utility model.

[0042] Fig.12 It is a schematic diagram of step 6 of the emergency repair beam erection process of the utility model.

[0043] Fig.13 It is a schematic diagram of step 7 of the emergency repair beam erection process of the utility model.

[0044] Fig.14 It is a schematic diagram of step 8 of the emergency repair beam erection process of the utility model.

[0045] Fig.15It is a schematic diagram of step 9 of the emergency repair beam erection process of the utility model.

[0046] Fig.16 It is a schematic diagram of step 10 of the emergency repair beam erection process of the utility model.

[0047] Fig.17 It is a schematic diagram of step 11 of the emergency repair beam erection process of the utility model.

[0048] Fig.18 It is a schematic diagram of the relationship between the axis of the broken line arch inscribed in the circular curve, the span ratio and the corresponding central angle.

[0049] Among them: 100 repair beams, 200 bridge piers, 300 existing box beams, and B damaged span;

[0050] 1 main arch structure, 11 arch rib, 111 arch rib end section, 111-1 first connecting ear plate, 111-2 first connecting flange, 111-3 pin shaft hole, 112 arch rib standard section, 112-1 second connecting ear plate, 112-2 second connecting flange, 112-3 third connecting flange, 113 span adjustment wedge, 12 tie beam, 121 telescopic tie beam component, 121-1 outer sleeve, 121-2 middle sleeve, 121-3 inner sleeve, 121-4 tie beam connecting ear plate, 121-5 manhole, 121-6 tie beam connecting flange, 13 hanger, 14 cable, 15 hanger connecting ear plate, 16 cushion pier, 21 end cross beam, 22 lower cross beam, 23 upper cross brace, 3 bridge deck system. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model is clearly and completely described below in conjunction with specific embodiments.

[0052] like Figures 1 to 5 A tie-arch type large-span emergency repair beam shown in the figure comprises two groups of main arch structures 1 arranged horizontally symmetrically, a plurality of cross beams connecting the two groups of main arch structures 1, and a bridge deck system 3 arranged between the two main arch structures 1; the main arch structure 1 comprises an arch rib 11, a retractable tie beam 12, a plurality of hangers 13 and a cable 14; the upper and lower ends of the hanger 13 are respectively connected to the arch rib 11 and the tie beam 12, and the two ends of the cable 14 are respectively connected to the two ends of the arch rib 11.

[0053] The arch rib 11 includes two arch rib end sections 111, m arch rib standard sections 112 and m+1 span-adjusting wedges 113. The intersection of the center lines of the arch rib end sections 111 and the arch rib standard sections 112 is located on the same arc, so that the arch axis is inscribed in a circular curve. Among them, m is a positive integer, and the value of m is related to the design span and span change modulus of the emergency repair beam.

[0054] The arch rib end section 111 and the arch rib standard section 112, as well as two adjacent arch rib standard sections 112 are hinged by ear plates and pins at the top corners, and the arch rib end section 111 and the span-adjusting wedge block 113, as well as the arch rib standard section 112 and the span-adjusting wedge block 113 are connected by flanges.

[0055] The arch rib standard section 112 and the arch rib end section 111 are single components of fixed length, and the span-adjusting wedge block 113 is a series of components adapted to different spans. The vertical surface of the span-adjusting wedge block 113 is triangular, and the vertex angle of the triangle is designed to be different according to different emergency repair spans.

[0056] The two ends of the cable 14 are respectively connected to the two ends of the arch rib 11, and the arch rib 11 is quickly formed by tensioning the cable 14. The length of the retractable tie beam 12 is adjusted to match the horizontal projection length of the arch rib 11 to form emergency repair beams with different spans.

[0057] like Figure 6 and Figure 7 As shown, by adjusting the number of arch rib standard sections 112 and assembling span adjusting wedges 113 of corresponding angles, arch ribs 11 adapted to different spans can be assembled. It should be noted that when the minimum design span is used, the span adjusting wedges 113 are not used, and a pad of equal thickness can be used (not shown in the figure). Figure 6 , which is a schematic diagram of the structure without using the span adjustment wedge 113.

[0058] like Figure 2 As shown, the arch rib standard section 112 is linear, its cross section is a thin-walled tubular structure, and its elevation is an isosceles trapezoid. The internal angle of the isosceles trapezoid of the elevation of the arch rib standard section 112 is determined according to the minimum span applicable to the emergency repair beam. Two sets of second connecting ear plates 112-1 are respectively provided at both ends of the top surface of the arch rib standard section 112, which are used to connect adjacent arch rib standard sections 112 or arch rib end sections 111. Each set of the second connecting ear plates 112-1 includes a single ear plate and a double ear plate. The two sets of second connecting ear plates 112-1 are symmetrically arranged about the top center of the arch rib standard section 112, so that the arch rib standard section 112 can be turned around for use; the end of the arch rib standard section 112 is provided with a second connecting flange 112-2, which is used to connect with the adjacent arch rib standard section 112, the arch rib end section 111 or the span adjustment wedge 113.

[0059] The side of the arch rib standard section 112 is also provided with a third connecting flange 112 - 3 for connecting with the upper cross brace 23 .

[0060] like Figure 3As shown, a set of first connecting ear plates 111-1 is provided on the top surface of one end where the arch rib end section 111 and the arch rib standard section 112 are connected. The first connecting ear plates 111-1 include a single ear plate and a double ear plate. The first connecting ear plates 111-1 are adapted to the second connecting ear plates 112-1.

[0061] The arch rib end section 111 is straight, and its cross-section is a thin-walled tubular structure. One end of the facade is an inclined surface that matches the end face of the arch rib standard section 112, and the inner angle of the inclined surface is the same as the inner angle of the isosceles trapezoid of the arch rib standard section 112; the other end of the facade of the arch rib end section 111 is semicircular, and one end of the semicircle is provided with a pin shaft hole 111-3 for connecting with the end of the tie beam 12 through a pin shaft (not shown in the figure).

[0062] As another implementation, the arch rib end section 111 and the arch rib standard section 112 may also adopt a bar-type truss structure.

[0063] like Figure 2 and Figure 3 As shown, in this embodiment, a plurality of suspension rod connecting ear plates 15 are disposed at intervals on the bottom surfaces of the arch rib standard section 112 and the arch rib end section 111 , and the upper ends of the suspension rods 13 are connected to the suspension rod connecting ear plates 15 .

[0064] like Figure 1 and 4 As shown, the tie beam 12 includes two telescopic tie beam components 121, and the telescopic tie beam components 121 include two or more tubular structures, which are mutually nested, and one end of the outermost tubular structure is provided with a connecting flange for connecting with another telescopic tie beam structure 121 through a flange; one end of the innermost tubular structure is provided with a tie beam connecting ear plate 121-4 for connecting with the end of the arch rib 11. Figure 4 As shown, in this embodiment, the telescopic tie beam component 121 includes an outer sleeve 121-1, an intermediate sleeve 121-2 and an inner sleeve 121-3 which are sequentially mounted from the outside to the inside, and a tie beam connection flange 121-6 is provided on the outer end surface of the outer sleeve 121-1 for connecting with another telescopic tie beam structure 121. The tie beam connection ear plate 121-4 is fixedly arranged on the upper side of the outer end of the inner sleeve 121-3, as shown in FIG. Figure 5 As shown, the tie beam connecting ear plate 121-4 is matched with one end of the semicircular shape of the arch rib end section 111 and is connected by a pin (not shown).

[0065] like Figure 4 and Figure 5As shown, a manhole 121-5 is provided on the outer end side of the inner sleeve 121-3, and the top surfaces of the outer sleeve 121-1, the middle sleeve 121-2 and the inner sleeve 121-3 are provided with a plurality of suspension rod connection holes (not shown in the figure) for connecting and fixing the lower end of the suspension rod 13. During installation, the lower end of the suspension rod 13 extends into the suspension rod connection hole, and the construction personnel enter the telescopic tie beam member 121 through the manhole 121-5 and fix it by installing a nut at the end of the suspension rod 13. The plurality of suspension rods 13 can be vertical suspension rods or mesh suspension rods, preferably mesh suspension rods, such as Figure 1 shown.

[0066] The tie beam 12 can adapt to the needs of different repair spans by adjusting the length of the telescopic tie beam component 121.

[0067] As another embodiment, the tie beam 12 may also be assembled by two end members and a plurality of standard members to adapt to different spans of emergency repair beams.

[0068] like Figure 1 As shown, in this embodiment, the cross beam includes an end cross beam 21, a middle cross beam 22 and an upper cross brace 23, all of which are two-section telescopic sleeve structures, and the cross section is a box-shaped section. By adjusting the overlapping length of the inner and outer telescopic sleeves, the emergency repair beam can adapt to the emergency repair needs of bridges of different widths; wherein, the end cross beam 21 is located at the end of the tie beam 12, and the two ends are respectively connected to the ends of the tie beam 12; the two ends of the middle cross beam 22 are respectively connected to the tie beam 12, and are arranged at intervals along the longitudinal direction of the bridge span; the two ends of the upper cross brace 23 are respectively connected to the flanges on the side of the arch rib standard section 112, and are arranged at intervals on the top of the arch rib. The two ends of the end cross beam 21 and the middle cross beam 22 are respectively connected to the tie beam 12 through flanges.

[0069] As another embodiment, the end cross beam 21, the middle cross beam 22 and the upper cross brace 23 may also be assembled using standard beam sections of different lengths.

[0070] After the emergency repair beam is temporarily opened to traffic, concrete is poured into the arch rib standard section 112, the arch rib end section 111 and the tie beam 12, so that the arch rib 11 and the tie beam 12 of the emergency repair beam become a steel tube concrete structure, thereby increasing the bearing capacity and rigidity of the emergency repair beam, thereby converting the temporary emergency repair beam into a permanent bridge.

[0071] like Figures 8 to 17 As shown, a method for erecting the aforementioned tied-rod arch-type large-span emergency repair beam 100, wherein B is a damaged bridge span, 100 is an emergency repair beam provided by the utility model, 200 is an existing bridge pier, and 300 is an existing box beam; the erection steps are as follows:

[0072] S1: Two retractable tie beam components 121 in a contracted state are placed in parallel at one end of the damaged bridge span, with the tie beam connecting ear plates 121 - 4 facing forward, and a retractable middle cross beam 22 is installed between the outermost tubular structures of the two retractable tie beam components 121 .

[0073] S2: Two retractable tie beam members 121 are symmetrically installed behind the two aforementioned retractable tie beam members 121, with the tie beam connecting ear plate 121-4 facing backwards. The front and rear two retractable tie beam members 121 are connected by the tie beam connecting flange 121-6 and bolts to form the tie beam 12, and a retractable middle cross beam 22 is installed between the outermost tubular structures of the rear two retractable tie beam members 121.

[0074] S3: The tie beams 12 on both sides are extended toward the front and rear ends respectively, and a retractable middle cross beam 22 is installed between the tubular structure of the inner layer of the tie beam (the middle sleeve 121-2 and the inner sleeve 121-3 in this embodiment) to connect the tie beams on both sides, and end cross beams 21 are installed at the front and rear ends of the tie beam 12 (the ends of the inner sleeve 121-3).

[0075] S4: Assemble the arch rib end section 111 and the arch rib standard section 112 above the rear two telescopic tie beam members 121, the arch rib end section 111 and the arch rib standard section 112, and the adjacent arch rib standard sections 112 are hingedly connected through the second connecting ear plate 112-1, the first connecting ear plate 111-1 and the steel pin at the top; the span adjusting wedge 13 is connected to the arch rib standard section 112 at one end by bolts, and the span adjusting wedge 113 is connected to the arch rib standard section 112 or the arch rib end section 111 at the other end by a cushion 16 (such as Fig.11 As shown in the figure, the arch ribs 11 are temporarily connected to form a straight box beam structure; a retractable upper cross brace 23 is installed to connect the arch ribs 11 on both sides.

[0076] S5: Connect the arch rib 11 and the two rear telescopic tie beam components 121 so that the tie beam 12 and the arch rib 11 are subjected to force together, and the arch rib 11 serves as a counterweight for the front cantilever tie beam.

[0077] S6: The tie beam and arch rib assembly continues to cantilever forward until the front section of the tie beam reaches the front pier.

[0078] S7: Release the connection between the tie beam 12 and the arch rib 11, and drop the tie beam 12 to the top surface of the pier.

[0079] S8: The arch rib 11 moves forward to the corresponding connection between the arch rib end section and the end of the tie beam, and the arch rib end section 111 is connected to the tie beam 12; the pad pier 16 between the span adjustment wedge block 113 and the arch rib standard section 112 or the arch rib end section 111 is removed.

[0080] S9: Install cables 14 at both ends of the arch rib 11.

[0081] S10: tension the cable 14 to make the arch rib shape 11 into the target shape, and install the remaining connecting bolts between the span adjustment wedge and the arch rib standard section or the arch rib end section. During the operation, the middle arch rib standard section can be lifted up a certain distance to facilitate tensioning the cable 14 to make the arch rib shape as shown in the figure. Fig.16 Shape shown.

[0082] S11: Install the hanger 13 between the arch rib 11 and the tie beam 12.

[0083] S12: Push the tie beams 12 on both sides outward, and the end cross beams 21, the middle cross beams 22, and the upper cross braces 23 are extended accordingly, so that the bridge deck of the emergency repair beam reaches the target width.

[0084] S13: Lay the bridge deck system 3 on the end cross beam 21 and the middle cross beam 22 to achieve temporary traffic.

[0085] Furthermore, after temporary traffic is achieved, concrete for the arch ribs and tie beams will be poured to make it a steel tube concrete structure, converting the emergency beam into a permanent bridge.

[0086] The principle that the tied arches of different spans described in the utility model can use the same arch rib standard section component is proved as follows:

[0087] See also Fig.18 , let the bridge span variation modulus be a, span L = na;

[0088] The arch axis adopts a circular curve inscribed in the broken line, and the rise-span ratio When the number of broken line segments (number of arch rib segments) is also n, we have:

[0089] Circular curve radius R:

[0090] (L / 2) 2 +(RS) 2 =R 2

[0091] (na / 2) 2 +(R-λna) 2 =R 2

[0092]

[0093] The central angle θ corresponding to the bridge span:

[0094]

[0095]

[0096] It can be seen that the central angle θ corresponding to the bridge span is only related to the arch span ratio λ. When the arch span ratio is determined, the central angle θ corresponding to the bridge span is uniquely determined.

[0097] The utility model adopts the most common span ratio λ=0.2 of the tied arch in bridge engineering, the corresponding center angle θ is about 87.2°, and the corresponding circular curve radius R=0.725na.

[0098] Arch rib segment length x:

[0099]

[0100] According to the applicable span range of bridge repair of the utility model, the span change modulus of railway bridge is a=8m, the span change modulus of highway bridge is a=10m, and the number of arch rib segments (including 2 arch rib end segments) is in the range of 6≤n≤15, then

[0101]

[0102] 1.104a≤x≤1.107a

[0103] It can be seen that when the circular curve inscribed broken line arch axis of the utility model is adopted, the bridge span is n span variation modulus a, that is, the bridge span L = na, and the number of arch rib segments of the emergency repair beam is also taken as n, the emergency repair beams of different spans can use the same length of arch rib standard section. When the length of the arch rib standard section is x B =1.1a, the length of the end section of the two arch ribs is 1.11a≤x D ≤1.15a(6≤n≤15), take the length of the arch rib end section x D =1.11a, when the maximum repair span is L=120m, n=15, a=8m, the maximum error of the arch rib end section length is only -32cm, and the corresponding bridge span error is -23cm, which can be effectively eliminated by setting the bridge deck.

[0104] Therefore, the same arch rib standard section components and the same arch rib end section components can be used to repair bridges of different spans, meeting the requirements of a small number of bridge repair equipment rods and replaceable and universal main rods, making it possible to use a tie arch bridge type for repair beams. According to the different span moduli of railway and highway bridges, the arch rib standard section can be designed modularly.

[0105] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tie-rod arch type large-span emergency repair beam, characterized in that: It comprises two sets of main arch structures (1) arranged horizontally and symmetrically, a plurality of cross beams connecting the two sets of main arch structures (1), and a bridge deck system (3) arranged between the two main arch structures (1); The main arch structure (1) comprises an arch rib (11), a retractable tie beam (12), a plurality of suspension rods (13) and cables (14); The arch rib (11) comprises two arch rib end sections (111), a plurality of arch rib standard sections (112) and a plurality of span adjustment wedges (113) adapted thereto, wherein the intersection of the center lines of the arch rib end sections (111) and the arch rib standard sections (112) is located on the same arc, so that the arch axis is in the shape of a broken line inscribed in a circular curve; The arch rib end section (111) and the arch rib standard section (112), as well as two adjacent arch rib standard sections (112), are hinged via a top corner portion, and the arch rib end section (111) and the span-adjusting wedge block (113), as well as the arch rib standard section (112) and the span-adjusting wedge block (113) are connected via flanges; The arch rib standard section (112) and the arch rib end section (111) are single components of fixed length, and the span-adjusting wedge block (113) is a series of components adapted to different spans. By adjusting the number of the arch rib standard sections (112) and assembling the span-adjusting wedge blocks (113) of corresponding angles, arch ribs (11) adapted to different spans can be assembled. The two ends of the cable (14) are respectively connected to the two ends of the arch rib (11), and the arch rib (11) is quickly formed by tensioning the cable (14).

2. The tie-rod arch type large-span emergency repair beam according to claim 1, characterized in that: The arch rib standard section (112) is in a straight line shape, has a thin-walled tubular structure in cross section, and an isosceles trapezoid in elevation.

3. The tie-rod arch type large-span emergency repair beam according to claim 2, characterized in that: The internal angle of the isosceles trapezoid of the vertical surface of the arch rib standard section (112) is determined according to the minimum span applicable to the emergency repair beam.

4. The tie-rod arch type large-span emergency repair beam according to claim 2, characterized in that: Two sets of second connecting ear plates (112-1) are respectively provided at two ends of the top surface of the arch rib standard section (112) for connecting adjacent arch rib standard sections (112) or arch rib end sections (111); each set of the second connecting ear plates (112-1) comprises a single-ear plate and a double-ear plate; the two sets of second connecting ear plates (112-1) are symmetrically arranged about the center of the top surface of the arch rib standard section (112), so that the arch rib standard section (112) can be turned around for use; A set of first connecting ear plates (111-1) is provided on the top surface of one end of the arch rib end section (111) butted against the arch rib standard section (112); the first connecting ear plates (111-1) include a single-ear plate and a double-ear plate; the first connecting ear plates (111-1) are matched with the second connecting ear plates (112-1).

5. The tie-rod arch type large-span emergency repair beam according to claim 2, characterized in that: The arch rib end section (111) is in a straight line shape, and its cross section is a thin-walled tubular structure. One end of the facade is an inclined surface that matches the end surface of the arch rib standard section (112), and the inner angle of the inclined surface is the same as the inner angle of the isosceles trapezoid of the arch rib standard section. The other end of the facade of the arch rib end section (111) is semicircular and is used to connect to the end of the tie beam (12).

6. The tie-rod arch type large-span emergency repair beam according to claim 1, characterized in that: The vertical surface of the span-adjusting wedge block (113) is in the shape of a triangle, and the vertex angle of the triangle is designed to be different according to different repair spans.

7. The tie-rod arch type large-span emergency repair beam according to claim 1, characterized in that: The tie beam (12) comprises two retractable tie beam components (121), the retractable tie beam components (121) comprising two or more tubular structures, the tubular structures being nested with each other, one end of the outermost tubular structure being provided with a connecting flange for connecting to another retractable tie beam component (121) via a flange; one end of the innermost tubular structure being provided with a tie beam connecting ear plate (121-4) for connecting to the end of the arch rib (11); the tie beam (12) can meet the needs of different repair spans by adjusting the length of the retractable tie beam components (121).

8. The tie-rod arch type large-span emergency repair beam according to claim 1, characterized in that: The cross beam comprises an end cross beam (21), a middle cross beam (22) and an upper cross brace (23), all of which are two-section telescopic sleeve structures, and the cross section is a box-shaped section. By adjusting the overlapping length of the inner and outer telescopic sleeves, the emergency repair beam can adapt to the emergency repair needs of bridges of different widths; The end cross beam (21) is located at the end of the tie beam (12), and both ends are respectively connected to the tie beam (12); The two ends of the middle cross beam (22) are respectively connected to the tie beams (12) and are arranged at intervals along the longitudinal direction of the bridge span; The two ends of the upper cross brace (23) are respectively connected to the flanges on the side of the arch rib standard section (112), and are arranged at intervals on the top of the arch rib.

9. The tie-rod arch type large-span emergency repair beam according to claim 1, characterized in that: After the emergency repair beam is temporarily opened to traffic, concrete is poured into the arch rib standard section (112), the arch rib end section (111) and the tie beam (12), so that the arch rib (11) and the tie beam (12) of the emergency repair beam become a steel tube concrete structure, thereby increasing the bearing capacity and rigidity of the emergency repair beam, thereby converting the temporary emergency repair beam into a permanent bridge.

10. The tie-rod arch type large-span emergency repair beam according to claim 1, characterized in that: A plurality of suspension rod connecting lug plates (15) are arranged at intervals on the bottom surfaces of the arch rib standard section (112) and the arch rib end section (111), and the upper ends of the suspension rods (13) are connected to the suspension rod connecting lug plates (15).

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