Nested modular guide beam structure and assembling and erecting method thereof

Abstract

The invention relates to a nested modular guide beam structure which is formed by connecting a plurality of guide beam standard sections and a guide beam tilting section end to end, and the guide beam standard sections are arranged at the two ends of the guide beam structure; each guide beam standard section is of a box beam structure with two closed ends and two end surfaces vertical to the bottom surface; the guide beam tilting section with the same height as the guide beam standard section is of a box beam structure with two closed ends and the top shorter than the bottom, and the front end face of the guide beam tilting section is perpendicular to the bottom face; the two end faces of the guide beam standard section and the front end face of the guide beam tilting section are provided with the same connector assemblies, and any connector assemblies which are in butt joint can be connected through locking assemblies. The bottom of the rear end face of the guide beam raising section is hinged to the bottom of the end face of the guide beam standard section, the top of the rear end face of the guide beam raising section is connected with the top of the end face of the guide beam standard section through an angle adjusting mechanism, and the included angle between the guide beam standard section and the guide beam raising section is variable. The problem that the guide beam splicing space is narrow can be solved, and the bridging speed can be effectively increased.

Description

Technical Field

[0001] The invention relates to the technical field of assembled highway steel bridges, and in particular to a nested modular guide beam structure and an assembling and erecting method thereof. Background Art

[0002] Prefabricated highway steel bridges play an important role in emergency rescue and disaster relief. The existing prefabricated highway steel bridge cantilever erection adopts a front-end double-main-beam truss structure assembled from scattered parts to assist in bridge erection. The shortcomings are that the structure is scattered, the types and quantities of components are large, the truss height is inconvenient for manual operation, the labor intensity is high, the length of the erection site is long, and the assembly and erection speed is slow. After the bridge is pushed to the other side, the front-end double-main-beam truss structure needs to be completely dismantled, and then the bridge head end column must be installed before the bridge span can be dropped onto the bridge support. The bridge is slow to fall, which is time-consuming and labor-intensive, and is not suitable for the rapid requirements under war and emergency rescue conditions.

[0003] At present, in order to increase the speed of bridge erection, new prefabricated highway steel bridges need to adopt new structural forms. The standard sections of the bridge adopt prefabricated structures of trusses, beams, and bridge decks, which are assembled into one in the factory. The original front-end double-main beam truss structure auxiliary bridge erection technology assembled from scattered parts is no longer applicable, and its erection method affects the improvement of bridge erection speed. However, the structural space of the new prefabricated highway steel bridge is limited. The structural form and assembly and erection method of the guide beam have become the key technical difficulties for the successful implementation of the new prefabricated highway steel bridge technical solution. The assembly space left for the guide beam is small, and at the same time, the guide beam structure is required to have high rigidity, light weight, and fast assembly. A new set of technical solutions is needed to solve it. Summary of the invention

[0004] In view of this, the present invention provides a nested modular guide beam structure and an assembly and erection method thereof, which can solve the problem of narrow guide beam assembly space and effectively improve the bridge erection speed.

[0005] The present invention is realized by the following technical scheme: a nested modular guide beam structure, comprising a guide beam structure composed of a plurality of guide beam standard segments and a guide beam raised segment connected end to end, both ends of the guide beam structure are guide beam standard segments; the guide beam standard segment is a box beam structure with closed ends and both end surfaces perpendicular to the bottom surface; the guide beam raised segment with the same height as the guide beam standard segment is a box beam structure with closed ends and a top shorter than the bottom surface, and the front end surface of the guide beam raised segment is perpendicular to the bottom surface; both end surfaces of the guide beam standard segment and the front end surface of the guide beam raised segment are fixed with corresponding The same joint components, any joint components that are docked with each other can be connected by locking components; the bottom of the rear end surface of the guide beam warping segment is hinged to the bottom of the end surface of the connected guide beam standard segment, the top of the rear end surface of the guide beam warping segment is connected to the top of the end surface of the connected guide beam standard segment through an angle adjustment mechanism, and the angle between the guide beam standard segment and the guide beam warping segment is variable; grooves are provided on both sides of the guide beam standard segment and the guide beam warping segment for cooperating with the supporting rollers on the inner side of the bridge standard segment, so that the guide beam structure slides inside the bridge standard segment.

[0006] Furthermore, the guide beam standard section includes a rectangular plate, a crossbeam, and a longitudinal beam I. Two parallel rectangular plates are fixedly connected by crossbeams evenly distributed along their length directions, and crossbeams are provided at both ends of the rectangular plates; the longitudinal beam I is equal in length to the rectangular plate, and four longitudinal beams I are respectively fixed at the bottom and top of the opposite back sides of the two rectangular plates, and the longitudinal beam I is aligned with the edge of the rectangular plate, and the space between the rectangular plate and the two longitudinal beams I fixed thereon forms a groove; the guide beam warping section includes a trapezoidal plate, a longitudinal beam II, a front end plate, a rear end plate, and a double-ear joint Head Ⅰ, two parallel trapezoidal plates are fixedly connected through the front end plate and the rear end plate, two longitudinal beams Ⅱ with the same length as the long sides of the trapezoidal plates are respectively fixed at the bottom of the back sides of the two trapezoidal plates, and the bottom sides of the longitudinal beams Ⅱ are aligned with the bottom sides of the trapezoidal plates; two double-ear joints Ⅰ with the same length as the short sides of the trapezoidal plates are respectively fixed at the top of the back sides of the two trapezoidal plates, the openings of the double-ear joints Ⅰ face the rear end plate, and the top sides of the double-ear joints Ⅰ are aligned with the top sides of the trapezoidal plates; the space between the trapezoidal plates and the double-ear joints Ⅰ and the longitudinal beams Ⅱ fixed thereon forms a groove.

[0007] Furthermore, the joint assembly includes two double-ear joints III and two single-ear joints III; the two double-ear joints III on the two end surfaces of the guide beam standard segment are respectively fixed on the two diagonal longitudinal beams I, and the two single-ear joints III are respectively fixed on the other two longitudinal beams I; the two double-ear joints III on the front end surface of the guide beam warping segment are respectively fixed on the diagonal longitudinal beam II and the closed end of the double-ear joint I, and the two single-ear joints III are respectively fixed on another longitudinal beam II and another closed end of the double-ear joint I; on the rear end surface of the guide beam warping segment, the longitudinal beam II with the single-ear joint III fixed at the front end is fixed with a double-ear joint II at the rear end, and the longitudinal beam II with the double-ear joint III fixed at the front end is fixed with a single-ear joint II at the rear end, and the double-ear joint II and the single-ear joint II are respectively connected to the single-ear joint III and the double-ear joint III at the corresponding positions of the connected guide beam standard segment.

[0008] Furthermore, the top of the rear end face of the warped segment of the guide beam is connected to the top of the end face of the connected standard segment of the guide beam through two angle adjustment mechanisms, and the front ends of the two angle adjustment mechanisms are each provided with a single-ear joint I with a plurality of connection holes, and the connection holes at the same position of the two angle adjustment mechanisms are respectively connected to the two double-ear joints I at the top of the warped segment of the guide beam through latches to achieve detachable connection; the rear end of the angle adjustment mechanism on the same side of the longitudinal beam II with the single-ear joint II is provided with a double-ear joint II, and the rear end of the angle adjustment mechanism on the same side of the longitudinal beam II with the double-ear joint II is provided with a single-ear joint II, and the double-ear joint II and the single-ear joint II are connected to the single-ear joint II. Joint II is respectively connected to the single-ear joint III and double-ear joint III at the corresponding positions of the connected guide beam standard segment; there is a connection hole A among the several connection holes of the single-ear joint I of the angle adjustment mechanism, and the distance between it and the rear end connection point of the angle adjustment mechanism is L1, the distance between the center line of the connection hole of the double-ear joint I at the top of the guide beam warping segment and the front end surface of the guide beam warping segment is L2, and the distance between the bottom hinge point of the guide beam warping segment and the front end surface of the guide beam warping segment is L3, L1+L2=L3, when the connection hole A is connected to the double-ear joint I, the guide beam standard segment and the guide beam warping segment are on the same horizontal line.

[0009] Furthermore, the locking assembly includes a rack pin, a guide seat and a pinning mechanism. The guide seat is a tubular structure with an axial through hole, the tube wall is provided with an opening to cooperate with the pinning mechanism, the rack pin cooperates with the through hole, and one end of the rack pin is provided with a rack to cooperate with the teeth of the pinning mechanism; the two guide seats are fixed on the two end faces of the standard segment of the guide beam and one side of the front end face of the warped segment of the guide beam, and the guide seat through holes respectively cooperate with the double-ear joint III connecting hole and the single-ear joint III connecting hole on this side; when the connecting components are connected, the four rack pins are respectively inserted into the guide seat through holes from the double-ear joint III connecting hole and the single-ear joint III connecting hole, and the rack engages with the pinning mechanism.

[0010] Furthermore, the guide seat is provided with a fixing plate, and the pin-pushing mechanism is provided with a clamp seat; the fixing plate and the clamp seat are fixedly connected to the two end faces of the guide beam standard segment or the front end face of the guide beam warping segment.

[0011] A nested modular guide beam assembly and erection method, using the nested modular guide beam structure described above, the steps are as follows:

[0012] S1: A single guide beam standard segment is inserted into a single bridge standard segment. The groove of the guide beam standard segment cooperates with the support roller inside the bridge standard segment. The guide beam standard segment and the bridge standard segment form a combination. A fixing pin is inserted from the top of the bridge standard segment into the cross beam of the guide beam standard segment so that the guide beam standard segment is limited in the bridge standard segment. Several combinations are transported to the construction site for assembly.

[0013] S2: Rollers are set up on the shore of the construction site, and the combination is placed on the rollers. When any two combinations are spliced, the connection components are first connected using the locking components to complete the assembly between the guide beam standard segments, and then the two bridge standard segments are connected;

[0014] S3: When assembling the combination body with the rear end face of the guide beam warping segment, hinge the bottom of the rear end face of the guide beam warping segment with the bottom of the end face of any guide beam standard segment, connect the top of the rear end face of the guide beam warping segment with the top of the end face of the above guide beam standard segment through the angle adjustment mechanism, so that the guide beam warping segment and the guide beam standard segment are located in the same straight line, release the fixing pin on the combination body, and push the guide beam warping segment into the standard bridge segment; then assemble the next combination body with the front end face of the guide beam warping segment, first use the locking component to connect the connection components on the end face of the guide beam standard segment and the front end face of the guide beam warping segment of the combination body, and then connect the two standard bridge segments;

[0015] S4: After the several combined bodies are assembled one by one, several guide beam standard segments and one guide beam warping segment are assembled into one to form a guide beam structure, and several bridge standard segments are assembled into one to form a bridge structure; the guide beam structure can be pushed out from the bridge structure through the supporting rollers until the guide beam warping segment is pushed out;

[0016] S5: Release the connection between the front end of the angle adjustment mechanism and the top of the guide beam warping segment; lift the guide beam standard segment connected to the rear end face of the guide beam warping segment, change the included angle between it and the guide beam warping segment, reconnect the front end of the angle adjustment mechanism to the top of the guide beam warping segment, and finally fix the included angle between the standard beam segment and the guide beam warping segment;

[0017] S6: Continue to push out the guide beam structure until two-thirds of the guide beam structure is pushed out of the bridge structure as a cantilever section, and the remaining one-third of the guide beam structure is limited in the bridge structure by a fixing pin; push the guide beam structure and the bridge structure as a whole structure to the opposite bank under the support of rollers, and the front end of the guide beam structure reaches the opposite bank and is placed on the rollers;

[0018] S7: Continue to push the whole structure until the bridge structure is safely pushed to the bridge position; release the connection between the front end of the angle adjustment mechanism and the top of the guide beam warping segment, flatten the guide beam standard segment connected to the rear end face of the guide beam warping segment, so that the guide beam warping segment and the guide beam standard segment are located in the same straight line, and reconnect the front end of the angle adjustment mechanism with the top of the guide beam warping segment; release the fixing pin to push the guide beam structure back into the bridge structure;

[0019] S8: Use fixing pins to connect the guide beam structure and the bridge structure to form the main body of the bridge; finally, assemble the bridge heads at both ends to complete the erection.

[0020] Furthermore, the splicing process of any two combinations in S2 is as follows: any ends of the guide beam standard segments of any two combinations are placed relative to each other, the double-ear joint III and the single-ear joint III on the end faces of the two guide beam standard segments cooperate with each other, four rack pins are respectively inserted into the guide seat through holes from the double-ear joint III connecting holes and the single-ear joint III connecting holes, the rack is engaged with the gear, and the connection of the two guide beam standard segments is completed.

[0021] Furthermore, the assembly process of the combination in S3 and the rear end face of the guide beam warping segment is as follows: the single-ear joint I connection hole A at the front end of the two angle adjustment mechanisms is respectively connected to the two double-ear joints I at the top of the rear end face of the guide beam warping segment through pins; the single-ear joint II and double-ear joint II at the rear end of the two angle adjustment mechanisms and the bottom of the rear end face of the guide beam warping segment are matched with the double-ear joint III and single-ear joint III of the guide beam standard segment; the double-ear joint III and single-ear joint III on the side where the guide seat of the guide beam standard segment is located are respectively inserted into the guide seat through holes through two rack pins, and the connection is achieved by the engagement of the rack and the gear, and the double-ear joint III and single-ear joint III on the other side of the guide beam standard segment are respectively connected by pins.

[0022] Furthermore, when the span between the two banks is less than three times the length of the combination, S7 can be replaced by the following steps: stop pushing the overall structure, release the connection between the front end of the angle adjustment mechanism and the top of the guide beam warping segment, flatten the guide beam standard segment connected to the rear end face of the guide beam warping segment, reconnect the front end of the angle adjustment mechanism with the top of the guide beam warping segment, so that the guide beam warping section and the guide beam standard segment are located in the same straight line; fix the front end of the guide beam structure on the opposite bank, and push the bridge structure with the support of the support rollers until the bridge structure is safely pushed to the bridge position.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The standard guide beam segment of the present invention can be nested into the standard bridge segment and transported and assembled as a whole, which solves the problem of narrow guide beam assembly space and reduces the length requirement of the erection site; the guide beam warping segment and the angle adjustment mechanism have simple structures, and the warping is convenient and labor-saving; the joint components at the two end faces of the guide beam standard segment and the front end face of the guide beam warping segment can be connected to each other through a locking component, which can effectively improve the bridge erection speed.

[0025] 2. The standard section and the warped section of the guide beam of the present invention are formed by press-forming and welding high-strength thin steel plates, which have high rigidity, light structure, good torsional and bending resistance, and improved structural stability.

[0026] 3. Orthogonal anisotropic connection joints are arranged at both ends of the standard segment of the guide beam of the present invention, regardless of the head and tail end faces, and no inspection or turning action is required for assembly, and the guide beam has good connection and interchangeability performance.

[0027] 4. The standard guide beam section and the warped guide beam section of the present invention ensure that the groove is flat and the lower edge is flush. The standard guide beam section is nested in the standard bridge section through the grooves on both sides and the supporting rollers to ensure that the guide beam structure is smoothly pushed in the bridge structure.

[0028] 5. According to different bridge lengths and lifting height requirements, the guide beam lifting segment of the present invention can be inserted between guide beam standard segments of different numbers, and the rear end face of the guide beam lifting segment can be connected to several guide beam standard segments; at the same time, the requirements of different lifting heights can also be met by adjusting the number and positions of the connecting holes on the angle adjustment mechanism, and the adaptability is high.

[0029] 6. The present invention has a high degree of modularization and has excellent connection performance and interchangeability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is the structural diagram of the guide beam standard segment, where (a) is the elevation view of the guide beam standard segment, (b) is the top view of the guide beam standard segment, (c) is the A-A section view of the guide beam standard segment, (d) is the B-B section view of the guide beam standard segment, (e) is the E-direction view of the guide beam standard segment, and (f) is the K-direction view of the guide beam standard segment.

[0031] Figure 2 The diagram is a structural diagram of the locking assembly, wherein (a) is a structural diagram of the rack latch, (b) is a structural diagram of the guide seat, and (c) is a structural diagram of the pin mechanism.

[0032] Figure 3 It is a structural diagram of the guide beam warping segment, where (a) is the elevation view of the guide beam warping segment, (b) is the C-C section view of the guide beam warping segment, (c) is the D-D section view of the guide beam warping segment, and (d) is the F-direction view of the guide beam warping segment.

[0033] Figure 4 It is the assembly drawing of the guide beam standard segment and the bridge standard segment, where (a) is the assembly elevation view and (b) is the E-E section view of the assembly of the guide beam standard segment and the bridge standard segment.

[0034] Figure 5 These are assembly drawings of the guide beam warping segment and the guide beam standard segment, where (a) is a diagram of the guide beam warping segment before it is pushed into the standard bridge segment, (b) is a diagram of the guide beam warping segment pushed into the standard bridge segment, and (c) is an F-F section view of the assembly of the guide beam warping segment and the guide beam standard segment.

[0035] Figure 6 This is the assembly diagram of the guide beam structure and the bridge structure.

[0036] Figure 7 This is the warping state diagram of the standard segment of the guide beam.

[0037] Figure 8 This is a partial enlarged view of the warping section of the guide beam.

[0038] Fig. 9 This is a diagram of the erection process.

[0039] Among them, 1-guide beam standard section, 2-guide beam warping section, 3-bridge standard section, 4-roller, 101-longitudinal beam I, 102-rectangular plate, 103-crossbeam, 104-double-ear joint III, 105-single-ear joint III, 110-rack pin, 111-pin body, 112-baffle, 113-screw I, 114-rack, 120-guide seat, 121-guide sleeve, 122-fixed plate, 1 30-push pin mechanism, 131-gear lever, 132-clamp seat, 133-clamp, 134-screw II, 201-single ear joint I, 202-double ear joint I, 203-trapezoidal plate, 204-longitudinal beam II, 205-rear end plate, 206-front end plate, 210-single ear joint II, 220-double ear joint II, 230-latch, 240-latch I, 301-fixing pin, 310-support roller. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] The present invention provides a nested modular guide beam structure, such as Figure 6 As shown, the guide beam structure is connected end to end by a plurality of guide beam standard segments 1 and a guide beam raised segment 2. Both ends of the guide beam structure are guide beam standard segments 1, and the guide beam raised segment 2 can be located at any position other than the end of the guide beam structure.

[0042] The guide beam standard segment 1 is a box beam structure with closed ends and both end faces perpendicular to the bottom face; the guide beam raised segment 2 of the same height as the guide beam standard segment 1 is a box beam structure with closed ends and its top shorter than the bottom face, and the front end face of the guide beam raised segment 2 is perpendicular to the bottom face; both end faces of the guide beam standard segment 1 and the front end face of the guide beam raised segment 2 are fixed with the same joint components, and any joint components that are butted against each other can be connected by a locking component. The bottom of the rear end face of the guide beam raised segment 2 is hinged to the bottom of the end face of the connected guide beam standard segment 1, and the top of the rear end face of the guide beam raised segment 2 is connected to the top of the end face of the connected guide beam standard segment 1 through an angle adjustment mechanism, the front end of the angle adjustment mechanism is connected to the top of the rear end face of the guide beam raised segment 1, and the rear end of the angle adjustment mechanism is connected to the top of the end face of the connected guide beam standard segment 1; the angle between the guide beam standard segment 1 and the guide beam raised segment 2 is variable.

[0043] Both side surfaces of the guide beam standard segment 1 and the guide beam raised segment 2 are provided with grooves for cooperating with the support rollers 310 on the inner side of the bridge standard segment 3 , so that the guide beam structure can slide inside the bridge standard segment 3 .

[0044] The top of the guide beam warping segment 2 is shorter than the bottom. When the distance between the two connection points of the angle adjustment mechanism is equal to the difference in length between the top and bottom of the guide beam warping segment 2, the end face of the guide beam standard segment 1 connected to the rear end face of the guide beam warping segment 2 is perpendicular to the bottom face of the guide beam warping segment 2, that is, the guide beam standard segment 1 and the guide beam warping segment 2 are located on the same horizontal line, and the angle between them is 0°. Release the connection between the front end of the angle adjustment mechanism and the top of the rear end face of the guide beam tilting segment 2, and tilt the guide beam standard segment 1 (rotate upward with the guide beam standard segment 1 and the bottom hinge point of the rear end face of the guide beam tilting segment 2 as the fulcrum), so that the included angle between the guide beam standard segment 1 and the guide beam tilting segment is a°, and the distance between the top of the end face of the guide beam standard segment 1 and the top of the rear end face of the guide beam tilting segment 2 changes, and reconnect the front end of the angle adjustment mechanism with the top of the rear end face of the guide beam tilting segment 2. Finally, the guide beam standard segment 1 and the guide beam tilting segment 2 are relatively fixed, maintaining the included angle of a°, and the tilting action is completed.

[0045] like Figure 1 As shown, in this embodiment, the guide beam standard segment 1 includes a rectangular plate 102, a cross beam 103, and a longitudinal beam I101. The two parallel rectangular plates 102 are fixedly connected by the cross beams 103 evenly distributed along their length directions, and cross beams 103 are provided at both ends of the rectangular plates 102. The cross beams 103 at both ends close the two ends of the guide beam standard segment 1, and their outer end surfaces serve as the front and rear end surfaces of the guide beam standard segment 1 respectively; the longitudinal beam I101 is the same length as the rectangular plate 102, and the four longitudinal beams I101 are respectively fixed at the bottom and top of the opposite sides of the two rectangular plates 102, the longitudinal beam I101 is aligned with the edge of the rectangular plate 102, and the space between the rectangular plate 102 and the two longitudinal beams I101 fixed thereon forms a groove.

[0046] like Figure 3 As shown, the guide beam warping segment 2 includes a trapezoidal plate 203, a longitudinal beam II 204, a front end plate 206, a rear end plate 205 and a double-ear joint I 202. The two parallel trapezoidal plates 203 are fixedly connected through the front end plate 205 and the rear end plate 206. Two longitudinal beams II 204 of equal length to the long sides of the trapezoidal plates 203 are respectively fixed at the bottom of the back sides of the two trapezoidal plates 203, and the bottom sides of the longitudinal beams II 204 are aligned with the bottom sides of the trapezoidal plates 203; two double-ear joints I 202 of equal length to the short sides of the trapezoidal plates 203 are respectively fixed at the tops of the back sides of the two trapezoidal plates 203, the openings of the double-ear joints I 202 face the rear end plate 205, the top sides of the double-ear joints I 202 are aligned with the top sides of the trapezoidal plates 203, and the center line of the connecting hole of the double-ear joints I 202 is perpendicular to the trapezoidal plates 203; the space between the trapezoidal plates 203 and the double-ear joints I 202 and the longitudinal beams II 204 fixed thereon forms a groove.

[0047] The trapezoidal plate 203 can be integrally formed by a short rectangular plate, a right-angled trapezoidal plate and a long rectangular plate, the short sides of the short rectangular plate and the right-angled trapezoidal plate are of equal length, and the long sides of the long rectangular plate and the right-angled trapezoidal plate are of equal length; the double-ear joint I 202 is fixed on the short rectangular plate, the longitudinal beam II 204 is fixed on the long rectangular plate, and the rear end plate 205 is a folded edge plate corresponding to the rear end surface.

[0048] The rectangular plate 102, the trapezoidal plate 203, the cross beam 103, the longitudinal beam I101, the longitudinal beam II204, the rear plate 205 and the front plate 206 can all be sheared or pressed by high-strength thin steel, wherein the cross beam 103 and the longitudinal beam I101 and the longitudinal beam II204 are formed by thin steel pressing to form a groove beam structure, that is, they are all columnar structures with one side open, the cross beam 103 opens toward the bottom surface, the longitudinal beam I101 opens toward the rectangular plate 102, and the longitudinal beam II204 opens toward the trapezoidal plate 203; the plate surfaces of the cross beam 103, the rear plate 205 and the front plate 206 can all be provided with a hollow structure. The guide beam standard segment 1 and the guide beam warping segment 2 made of high-strength thin steel have high rigidity, light structure, good torsion and bending resistance, and high structural stability. After the guide beam structure is assembled, the lower edge is flush and the groove edge is flat, which ensures that the guide beam structure moves smoothly in the bridge standard segment 3.

[0049] As an improvement, Figure 1 , 3 As shown, the joint assembly includes two double-ear joints III104 and two single-ear joints III105; the two double-ear joints III104 on the two end surfaces of the guide beam standard segment 1 are respectively fixed on the two diagonal longitudinal beams I101, and the two single-ear joints III105 are respectively fixed on the other two longitudinal beams I101; the two double-ear joints III104 on the front end surface of the guide beam warping segment 2 are respectively fixed on the diagonal longitudinal beams II204 and the closed end of the double-ear joint I202, and the two single-ear joints III105 are respectively fixed on another longitudinal beam II204 and another closed end of the double-ear joint I202. On the rear end face of the guide beam warping segment, the longitudinal beam II204 with the single-ear joint III105 fixed at the front end has a double-ear joint II220 fixed at the rear end, and the longitudinal beam II204 with the double-ear joint III104 fixed at the front end has a single-ear joint II210 fixed at the rear end. The double-ear joint II220 and the single-ear joint II210 are connected with the single-ear joint III105 and the double-ear joint III104 at the corresponding positions of the connected guide beam standard segment. That is, the double-ear joint II220 on the rear end face of the guide beam warping segment is located at the same position as the double-ear joint III104 on both end faces of the guide beam standard segment 1 and the double-ear joint III104 on the front end face of the guide beam warping segment 2. The center lines of the connection holes of the double-ear joint III104, the connection holes of the single-ear joint III105, the connection holes of the double-ear joint II220 and the connection holes of the single-ear joint II210 are all parallel to the center line of the connection hole of the double-ear joint I202.

[0050] As an improvement, the top of the rear end face of the guide beam warping segment 2 is connected to the top of the end face of the connected guide beam standard segment 1 through two angle adjustment mechanisms, and the two angle adjustment mechanisms are respectively connected to the two double-ear joints I202 on the rear end face of the guide beam warping segment 2. The front ends of the two angle adjustment mechanisms are each provided with a single-ear joint I201 with a plurality of connection holes, and the connection holes at different positions are at different distances from the connection points at the rear end of the angle adjustment mechanism. The connection holes at the same position of the two angle adjustment mechanisms are respectively connected to the two double-ear joints I202 at the top of the guide beam warping segment 2 through a latch 230 to achieve detachable connection. The rear end of the angle adjustment mechanism on the same side of the longitudinal beam II204 provided with the single-ear joint II210 is provided with a double-ear joint II220, and the rear end of the angle adjustment mechanism on the same side of the longitudinal beam II204 provided with the double-ear joint II220 is provided with a single-ear joint II210, and the double-ear joint II220 and the single-ear joint II210 are respectively connected to the single-ear joint III105 and the double-ear joint III104 at the corresponding positions of the connected guide beam standard segment.

[0051] There is a connection hole A among several connection ports of the single-ear joint Ⅰ201 of the angle adjustment mechanism, and the distance between it and the connection point at the rear end of the angle adjustment mechanism is L1, the distance between the center line of the connection hole of the double-ear joint Ⅰ202 at the top of the guide beam warping segment 2 and the front end face of the guide beam warping segment 2 is L2, and the distance between the hinge point at the bottom of the guide beam warping segment 2 and the front end face of the guide beam warping segment 2 is L3, L1+L2=L3, when the connection hole A is connected to the double-ear joint Ⅰ202, the guide beam standard segment 1 and the guide beam warping segment 2 are on the same horizontal line. By setting the number and position of the connection holes on the angle adjustment mechanism, the requirements of different warping heights can be met.

[0052] In this embodiment, the front end face of the guide beam standard segment 1 (viewed from front to back) has double-ear joint III 104 located at the upper left corner and lower right corner, and the single-ear joint III 105 located at the upper right corner and lower left corner; the rear end face of the guide beam standard segment 1 (viewed from back to front) also has double-ear joint III 104 located at the upper left corner and lower right corner, and the single-ear joint III 105 located at the upper right corner and lower left corner; the front and rear end faces of the guide beam standard segment 1 are mutually orthogonal anisotropic connection joints, that is, the guide beam standard segment 1 is not divided into the first and last segments, and any end face of any guide beam standard segment 1 can be connected to each other during assembly, without inspection or adjustment, which greatly improves work efficiency and further meets the requirements of narrow working space. At the same time, the layout of the joint components of the front end face of the guide beam warping segment 2 and the end face of the guide beam standard segment 1 are completely consistent, and the front end face of the guide beam warping segment 2 and any end face of any guide beam standard segment 1 can be connected to each other. The rear end face of the guide beam warping segment 2 (looking from back to front) has a single-ear joint Ⅱ210 at the lower left corner and a double-ear joint Ⅱ220 at the lower right corner. The rear end of the angle adjustment mechanism above the single-ear joint Ⅱ210 is a double-ear joint Ⅱ220, and the rear end of the angle adjustment mechanism above the double-ear joint Ⅱ220 is a single-ear joint Ⅱ210, ensuring that it can be matched and connected with any end face of the guide beam standard segment 1.

[0053] As a further improvement, Figure 2 As shown, the locking assembly includes a rack latch 110, a guide seat 120 and a pinning mechanism 130. The guide seat 120 is a tubular structure provided with an axial through hole. The tube wall is provided with an opening to cooperate with the pinning mechanism 130. The rack latch 110 is inserted into the through hole in cooperation with the rack latch 110. One end of the rack latch 110 is provided with a rack 114 that cooperates with the teeth of the pinning mechanism 130. The two guide seats 120 are fixed on one side of the two end faces of the guide beam standard segment 1 and the front end face of the guide beam warping segment 2. The through holes of the guide seats 120 are respectively matched with the double-ear joint III 104 connecting hole and the single-ear joint III 105 connecting hole on this side. When the connecting assemblies are connected, the four rack latches 110 are respectively inserted into the through holes of the guide seats 120 from the double-ear joint III 104 connecting hole and the single-ear joint III 105 connecting hole, and the rack 114 is engaged with the pinning mechanism 130. The rear ends of the two angle adjustment mechanisms and the single-ear joint II210 and double-ear joint II220 at the bottom of the rear end surface of the guide beam tilting segment 2 are connected to the double-ear joint III104 and single-ear joint III105 on the side of the guide seat of the guide beam standard segment 1 through two rack pins, respectively, and are connected by the engagement of the rack and the gear; the rear ends of the two angle adjustment mechanisms and the single-ear joint II210 and double-ear joint II220 at the bottom of the rear end surface of the guide beam tilting segment 2 are connected to the double-ear joint III104 and single-ear joint III105 on the side of the guide beam standard segment 1 where the guide seat is not fixed through the pin I240.

[0054] In this embodiment, the rack latch 110 is assembled from a latch body 111, a baffle 112, and a screw 113. A rack 114 is processed at the middle diameter of a length of the latch body 111 in the axial direction; the guide seat 120 is welded from a guide sleeve 121 and a fixing plate 122. The fixing plate 122 is welded and fixed on the two end faces of the guide beam standard segment 1 or the front end face of the guide beam warping segment 2. The guide sleeve 121 has an opening in the radial direction of an axial section to cooperate with the pin mechanism 130; the pin mechanism 130 is composed of a gear lever 131, a clamp seat 132, a clamp 133, and a screw 134. Two gears are fixed at the upper and lower ends of the gear lever 131. The middle section of the gear lever (between the two gears) is an optical axis, which is fixedly connected to the clamp 133 through the clamp seat 132 and assembled on the gear lever 131 through screws 134. The clamp seat 132 is welded to the two end faces of the guide beam standard segment 1 or the front end face of the guide beam warping segment 2. The pin-pushing mechanism 130 is assembled vertically, and the two gears are respectively matched with the openings of the two guide sleeves 121 . The pin-pushing mechanism 130 controls the extraction and insertion of the two rack latches 110 at the same time.

[0055] The present invention provides a nested modular guide beam assembly and erection method, which adopts the nested modular guide beam structure described above, and the steps are as follows:

[0056] S1: Figure 4As shown, a single guide beam standard segment 1 is inserted into a single bridge standard segment 3, the groove of the guide beam standard segment 1 cooperates with the support roller 310 on the inner side of the bridge standard segment 3, and the guide beam standard segment 1 and the bridge standard segment 3 form a combination; a fixing pin 310 is inserted from the top of the bridge standard segment 3 into the cross beam of the guide beam standard segment 1, so that the guide beam standard segment 1 is limited in the bridge standard segment 3; several combinations are transported to the construction site for assembly. The guide beam standard segment 1 is inserted into the bridge standard segment 3 to reduce the transportation volume of the bridge structure, reduce the length requirement of the bridge erection site, and facilitate on-site assembly and erection.

[0057] S2: Rollers 4 are set up on the shore of the construction site, and the combination is placed on the rollers 4. When any two combinations are spliced, the locking assembly is first used to connect the connection assembly to complete the assembly between the guide beam standard segments 1, and then the two bridge standard segments 3 are connected. In this embodiment, any ends of the guide beam standard segments 1 of any two combinations are placed relative to each other, the double-ear joints III 104 and the single-ear joints III 105 on the end faces of the two guide beam standard segments 1 cooperate with each other, and the four rack pins 110 are respectively inserted from the connection holes of the double-ear joints III 104 and the connection holes of the single-ear joints III 105 into the through holes of the guide seat 120, and the rack 114 is engaged with the gear to complete the connection of the two guide beam standard segments 1.

[0058] S3: Figure 5 As shown, when the combination is assembled with the rear end face of the guide beam tilted segment 2, the bottom of the rear end face of the guide beam tilted segment 2 is hinged to the bottom of any end face of the guide beam standard segment 1, and the top of the rear end face of the guide beam tilted segment 2 and the top of the end face of the above-mentioned guide beam standard segment 1 are connected by the angle adjustment mechanism so that the guide beam tilted segment 2 and the guide beam standard segment 1 are located in the same straight line, and the connection on the combination is released (the fixing pin 301 is pulled out), and the guide beam tilted segment 2 is pushed into the standard bridge segment 3; then the next combination is assembled with the front end face of the guide beam tilted segment 2, and the locking assembly is first used to connect the connection assemblies on the end face of the guide beam standard segment 1 and the front end face of the guide beam tilted segment 2 of the combination, and then the two standard bridge segments 3 are connected.

[0059] In this embodiment, the single-ear joint I201 connection hole A at the front end of the two angle adjustment mechanisms is respectively connected to the two double-ear joints I202 at the top of the rear end surface of the guide beam warping segment 2 through the pin 230; the single-ear joint II210 and double-ear joint II220 at the rear end of the two angle adjustment mechanisms and the bottom of the rear end surface of the guide beam warping segment 2 are matched with the double-ear joint III104 and single-ear joint III105 of the guide beam standard segment 1, and the double-ear joint III104 connection hole and the single-ear joint III105 connection hole on the side where the guide seat of the guide beam standard segment 1 is located are respectively inserted into the through hole of the guide seat 120 through two rack pins 110, and the connection is achieved by engaging the rack 114 with the gear; the double-ear joint III104 connection hole and the single-ear joint III105 connection hole on the other side of the guide beam standard segment 1 are respectively connected through the pin I240, completing the assembly of the rear end surface of the guide beam warping segment 2 and the guide beam standard segment 1.

[0060] S4: Figure 6 As shown, after several combined bodies are assembled one by one, that is, after the required bridge length is reached, several guide beam standard segments 1 and one guide beam tilting segment 2 are assembled into one to form a guide beam structure, and several bridge standard segments are assembled into one to form a bridge structure; the guide beam structure can be pushed out of the bridge structure through the support roller 310 until the guide beam tilting segment 2 is pushed out. According to different bridge lengths and tilting height requirements, the guide beam tilting segment 2 can be inserted between guide beam standard segments 1 with different sections, that is, the right side of the guide beam tilting segment 2 can be several guide beam standard segments 1.

[0061] S5: Figure 7 , 8 As shown, the connection between the front end of the angle adjustment mechanism and the top of the guide beam tilting segment 2 is released (pull out the pin 230); lift the guide beam standard segment 1 connected to the rear end face of the guide beam tilting segment 2, change the angle between it and the guide beam tilting segment 2, select the single ear joint Ⅰ201 connection hole with a suitable distance, reconnect the front end of the angle adjustment mechanism with the top of the guide beam tilting segment 2 (reinsert the pin 230), and finally the guide beam standard segment 1 and the guide beam tilting segment 2 are relatively fixed to maintain the angle.

[0062] S6: Fig. 9 As shown, the guide beam structure continues to be pushed out until two-thirds of the guide beam structure is pushed out of the bridge structure as a cantilever section, and the fixing pin 301 is reinserted into the remaining one-third of the guide beam structure to limit it in the bridge structure; the guide beam structure and the bridge structure are pushed toward the opposite bank as a whole structure with the support of the roller 4, and the front end of the guide beam structure reaches the roller 4 on the opposite bank.

[0063] S7: Continue to push the whole structure until the bridge structure is safely pushed to the bridge position; the overall structural rigidity of the guide beam structure is large, which meets the large force requirements of nested consolidation, and the nested modular guide beam structure is light and can prevent the bridge cantilever from tipping over longitudinally when pushed. Release the connection between the front end of the angle adjustment mechanism and the top of the guide beam warping segment 2 (pull out the pin 230), lay the guide beam standard segment 1 connected to the rear end face of the guide beam warping segment 2 flat, so that the guide beam warping segment 2 and the guide beam standard segment 1 are located in the same straight line, and at the same time select the connection hole A of the single-ear joint Ⅰ201 of the angle adjustment mechanism, reconnect the front end of the angle adjustment mechanism with the top of the guide beam warping segment 2 (re-insert the pin 230); pull out the fixing pin 301 to push the guide beam structure back into the bridge structure.

[0064] S8: Insert the fixing pins 301 to connect the guide beam structure and the bridge structure to form the bridge body; finally, assemble the bridge heads at both ends to complete the erection.

[0065] In specific implementation, when erecting a small-span bridge, for example, when the span between the two banks is less than three times the length of the combined body, after the front end of the guide beam structure reaches the erection roller 4 on the opposite bank, the above S7 can be replaced by the following steps: release the connection between the front end of the angle adjustment mechanism and the top of the guide beam lift segment 2 (pull out the pin 230), lay the guide beam standard segment 1 connected to the rear end face of the guide beam lift segment 2 flat, and reconnect the front end of the angle adjustment mechanism to the top of the guide beam lift segment 2 (the single-ear joint Ⅰ201 connection holes A at the front ends of the two angle adjustment mechanisms are respectively connected with the two double-ear joints Ⅰ202 on the top of the rear end face of the guide beam lift segment 2), so that the guide beam lift segment and the guide beam standard segment 1 are located in the same straight line; fix the front end of the guide beam structure on the opposite bank, and push the bridge structure with the support of the support roller 310 until the bridge structure is safely pushed to the bridge position.

[0066] The guide beam in the present invention is a single guide beam structure, which is compact and lightweight and can be assembled in a small space. The box beam structure has high rigidity, light weight, good torsion and bending resistance, and good structural stability. The number of components is small, the guide beam warping structure is simple, the warping method is labor-saving, the structural modularity is high, and it has good connection performance, interchangeability and adaptability. The erection method is simple and fast and can effectively improve the bridge erection speed, which solves the technical problem of assembling the guide beam in a small space of a new assembled highway steel bridge and reduces the length requirement of the erection site.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nested modular guide beam structure, characterized in that: The guide beam structure is formed by connecting a number of guide beam standard segments and a guide beam warping segment end to end, and both ends of the guide beam structure are guide beam standard segments; The standard guide beam segment is a box beam structure with closed ends and both end faces perpendicular to the bottom face; the guide beam warping segment of the same height as the standard guide beam segment is a box beam structure with closed ends and its top shorter than the bottom face, and the front end face of the guide beam warping segment is perpendicular to the bottom face; both end faces of the standard guide beam segment and the front end face of the guide beam warping segment are fixed with the same joint components, and any joint components that are butted against each other can be connected by a locking component; the bottom of the rear end face of the guide beam warping segment is hinged to the bottom of the end face of the connected standard guide beam segment, and the top of the rear end face of the guide beam warping segment is connected to the top of the end face of the connected standard guide beam segment through an angle adjustment mechanism, and the angle between the standard guide beam segment and the guide beam warping segment is variable; Both side surfaces of the guide beam standard segment and the guide beam raised segment are provided with grooves for cooperating with the supporting rollers on the inner side of the standard bridge segment, so that the guide beam structure can slide within the standard bridge segment.

2. The nested modular guide beam structure according to claim 1, characterized in that: The standard section of the guide beam includes a rectangular plate, a crossbeam, and a longitudinal beam I. Two rectangular plates parallel to each other are fixedly connected by crossbeams evenly distributed along their length direction, and crossbeams are provided at both ends of the rectangular plates. The longitudinal beam I is equal in length to the rectangular plate. Four longitudinal beams I are respectively fixed to the bottom and top of the opposite back sides of the two rectangular plates. The longitudinal beam I is aligned with the edge of the rectangular plate, and the space between the rectangular plate and the two longitudinal beams I fixed thereon forms a groove. The guide beam warping section includes a trapezoidal plate, a longitudinal beam II, a front end plate, a rear end plate and a double-ear joint I. Two parallel trapezoidal plates are fixedly connected through the front end plate and the rear end plate. Two longitudinal beams II having the same length as the long sides of the trapezoidal plates are respectively fixed at the bottom of the opposite sides of the two trapezoidal plates, and the bottom edge of the longitudinal beam II is aligned with the bottom edge of the trapezoidal plates. Two double-ear joints I of the same length as the short sides of the trapezoidal plates are respectively fixed on the tops of the opposite back sides of the two trapezoidal plates, the openings of the double-ear joints I face the rear end plate, and the top edges of the double-ear joints I are aligned with the top edges of the trapezoidal plates; The space between the trapezoidal plate and the double-ear joint I and the longitudinal beam II fixed thereon forms a groove.

3. The nested modular guide beam structure according to claim 2, characterized in that: The joint assembly includes two double-ear joints III and two single-ear joints III; the two double-ear joints III on both end surfaces of the guide beam standard segment are respectively fixed to the two diagonal longitudinal beams I, and the two single-ear joints III are respectively fixed to the other two longitudinal beams I; the two double-ear joints III on the front end surface of the guide beam warping segment are respectively fixed to the diagonal longitudinal beam II and the closed end of the double-ear joint I, and the two single-ear joints III are respectively fixed to another longitudinal beam II and another closed end of the double-ear joint I; On the rear end surface of the guide beam warping section, the longitudinal beam II with a single-ear joint III fixed at the front end has a double-ear joint II fixed at the rear end, and the longitudinal beam II with a double-ear joint III fixed at the front end has a single-ear joint II fixed at the rear end. The double-ear joint II and the single-ear joint II are respectively connected to the single-ear joint III and the double-ear joint III at the corresponding positions of the connected guide beam standard section.

4. The nested modular guide beam structure according to claim 3, characterized in that: The top of the rear end face of the guide beam warping segment is connected to the top of the end face of the connected guide beam standard segment through two angle adjustment mechanisms, and the front ends of the two angle adjustment mechanisms are each provided with a single-ear joint I with a plurality of connection holes, and the connection holes at the same position of the two angle adjustment mechanisms are respectively connected to the two double-ear joints I at the top of the guide beam warping segment through latches to achieve detachable connection; a double-ear joint II is provided at the rear end of the angle adjustment mechanism on the same side of the longitudinal beam II provided with the single-ear joint II, and a single-ear joint II is provided at the rear end of the angle adjustment mechanism on the same side of the longitudinal beam II provided with the double-ear joint II, and the double-ear joint II and the single-ear joint II are respectively connected to the single-ear joint III and the double-ear joint III at the corresponding positions of the connected guide beam standard segment; There is a connection hole A among several connection holes of the single-ear joint Ⅰ of the angle adjustment mechanism, and the distance between it and the rear end connection point of the angle adjustment mechanism is L1, the distance between the center line of the connection hole of the double-ear joint Ⅰ at the top of the guide beam warping segment and the front end surface of the guide beam warping segment is L2, and the distance between the bottom hinge point of the guide beam warping segment and the front end surface of the guide beam warping segment is L3, L1+L2=L3, when the connection hole A is connected with the double-ear joint Ⅰ, the standard segment of the guide beam and the guide beam warping segment are on the same horizontal line.

5. The nested modular guide beam structure according to claim 4, characterized in that: The locking assembly includes a rack latch, a guide seat and a pinning mechanism. The guide seat is a tubular structure with an axial through hole. The tube wall is provided with an opening to cooperate with the pinning mechanism. The rack latch cooperates with the through hole. One end of the rack latch is provided with a rack to cooperate with the teeth of the pinning mechanism. The two guide seats are fixed on one side of the two end faces of the standard segment of the guide beam and the front end face of the warped segment of the guide beam, and the through holes of the guide seats are respectively matched with the double-ear joint III connecting hole and the single-ear joint III connecting hole on this side; when the connecting components are connected, the four rack pins are respectively inserted into the through holes of the guide seats from the double-ear joint III connecting hole and the single-ear joint III connecting hole, and the rack is engaged with the pin mechanism.

6. The nested modular guide beam structure according to claim 4 or 5, characterized in that: The guide seat is provided with a fixing plate, and the pin-pushing mechanism is provided with a clamp seat; the fixing plate and the clamp seat are fixedly connected to the two end faces of the guide beam standard segment or the front end face of the guide beam warping segment.

7. A nested modular guide beam assembly and erection method, characterized in that: Using the nested modular guide beam structure as claimed in claim 5 or 6, the steps are as follows: S1: A single guide beam standard segment is inserted into a single bridge standard segment. The groove of the guide beam standard segment cooperates with the support roller inside the bridge standard segment. The guide beam standard segment and the bridge standard segment form a combination. A fixing pin is inserted from the top of the bridge standard segment into the cross beam of the guide beam standard segment so that the guide beam standard segment is limited in the bridge standard segment. Several combinations are transported to the construction site for assembly. S2: Rollers are set up on the shore of the construction site, and the combination is placed on the rollers. When any two combinations are spliced, the connection components are first connected using the locking components to complete the assembly between the guide beam standard segments, and then the two bridge standard segments are connected; S3: When the combination body is assembled with the rear end face of the guide beam warping segment, the bottom of the rear end face of the guide beam warping segment is hinged with the bottom of the end face of any guide beam standard segment, and the top of the rear end face of the guide beam warping segment and the top of the end face of the above guide beam standard segment are connected through the angle adjustment mechanism, so that the guide beam warping segment and the guide beam standard segment are located in the same straight line, and the fixing pin on the combination body is released, and the guide beam warping segment is pushed into the bridge standard segment; Then assemble the next combination with the front end face of the guide beam warping segment. First, use the locking component to connect the connection components on the end face of the guide beam standard segment of the combination and the front end face of the guide beam warping segment, and then connect the two standard bridge segments. S4: After the several combined bodies are assembled one by one, several guide beam standard segments and one guide beam warping segment are assembled into one to form a guide beam structure, and several bridge standard segments are assembled into one to form a bridge structure; the guide beam structure can be pushed out from the bridge structure through the supporting rollers until the guide beam warping segment is pushed out; S5: Release the connection between the front end of the angle adjustment mechanism and the top of the guide beam warping segment; lift the guide beam standard segment connected to the rear end face of the guide beam warping segment, change the included angle between it and the guide beam warping segment, reconnect the front end of the angle adjustment mechanism to the top of the guide beam warping segment, and finally fix the included angle between the standard beam segment and the guide beam warping segment; S6: Continue to push out the guide beam structure until two-thirds of the guide beam structure is pushed out of the bridge structure as a cantilever section, and the remaining one-third of the guide beam structure is limited in the bridge structure by a fixing pin; push the guide beam structure and the bridge structure as a whole structure to the opposite bank under the support of rollers, and the front end of the guide beam structure reaches the opposite bank and is placed on the rollers; S7: Continue to push the whole structure until the bridge structure is safely pushed to the bridge position; release the connection between the front end of the angle adjustment mechanism and the top of the guide beam warping segment, flatten the guide beam standard segment connected to the rear end face of the guide beam warping segment, so that the guide beam warping segment and the guide beam standard segment are located in the same straight line, and reconnect the front end of the angle adjustment mechanism with the top of the guide beam warping segment; release the fixing pin to push the guide beam structure back into the bridge structure; S8: Use fixing pins to connect the guide beam structure and the bridge structure to form the main body of the bridge; finally, assemble the bridge heads at both ends to complete the erection.

8. The nested modular guide beam assembly and installation method according to claim 7, characterized in that: The splicing process of any two combinations in S2 is as follows: any ends of the guide beam standard segments of any two combinations are placed relative to each other, the double-ear joint III and the single-ear joint III on the end faces of the two guide beam standard segments cooperate with each other, four rack pins are respectively inserted into the guide seat through holes from the double-ear joint III connecting holes and the single-ear joint III connecting holes, the rack and the gear are engaged, and the connection of the two guide beam standard segments is completed.

9. The nested modular guide beam assembly and erection method according to claim 7, characterized in that: The assembly process of the combination in S3 and the rear end face of the guide beam warping segment is as follows: the single-ear joint I connection holes A at the front ends of the two angle adjustment mechanisms are respectively connected to the two double-ear joints I at the top of the rear end face of the guide beam warping segment through pins; the single-ear joint II and double-ear joint II at the rear ends of the two angle adjustment mechanisms and the bottom of the rear end face of the guide beam warping segment are matched with the double-ear joint III and single-ear joint III of the guide beam standard segment; the double-ear joint III and single-ear joint III on the side where the guide seat of the guide beam standard segment is located are respectively inserted into the guide seat through holes through two rack pins, and the connection is achieved by the engagement of the rack and the gear, and the double-ear joint III and single-ear joint III on the other side of the guide beam standard segment are respectively connected by pins.

10. The method for assembling and erecting nested modular guide beams according to any one of claims 7 to 9, characterized in that: When the span of both banks is less than three times the length of the combined body, S7 can be replaced by the following steps: Stop pushing the overall structure, release the connection between the front end of the angle adjustment mechanism and the top of the guide beam warping segment, flatten the guide beam standard segment connected to the rear end face of the guide beam warping segment, reconnect the front end of the angle adjustment mechanism with the top of the guide beam warping segment, so that the guide beam warping section and the guide beam standard segment are in the same straight line; fix the front end of the guide beam structure on the opposite bank, and push the bridge structure with the support of the support rollers until the bridge structure is safely pushed to the bridge position.

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