Large-span T-shaped structure swivel construction method close to electrified railway

Abstract

The invention provides a large-span T-shaped structure swivel construction method close to an electrified railway, and belongs to the technical field of bridge construction.The construction method comprises the following steps that bridge piers are erected on the two sides of an existing railway line respectively, and swivel devices are arranged at the tops of the bridge piers; prefabricating a first beam section and a second beam section of the T-shaped bridge; the prefabricated first beam section and the prefabricated second beam section are hoisted to the tops of the corresponding bridge piers correspondingly and connected with the corresponding swivel devices, a certain included angle is formed between the hoisted first beam section and the existing railway line, a certain included angle is formed between the hoisted second beam section and the existing railway line, and the first beam section and the second beam section are checked and adjusted; turning devices are started, and the first beam section and the second beam section horizontally rotate around the centers of the bridge piers correspondingly to be coaxial with the axis of the bridge; a reset type modular connecting device is installed between the first beam section and the second beam section; and constructing a bridge deck system. According to the method, the closure precision and the adjustment convenience are improved, the construction risk is remarkably reduced, and the influence on railway operation is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a large-span T-structure rotation construction method adjacent to an electrified railway. Background Art

[0002] With the rapid development of my country's high-speed railways and urban rail transit, new lines will inevitably cross existing railway lines. Bridge construction near electrified railway lines has high safety risks and great construction difficulties. Traditional bridge construction methods, such as cast-in-place brackets and cantilever casting, often require long-term line blockage in environments near electrified railways, which seriously affects railway operations. The T-beam rotation construction technology, by prefabricating T-beam sections on both sides of the railway and then using a rotating device to rotate them to the designed position to close them, can greatly shorten the time for blocking the line and reduce the impact on railway operations.

[0003] After searching, the authorization announcement number CN114457701B discloses a multi-support point rotating construction turntable for bridge construction and a use process thereof, which belongs to the field of bridge construction technology. The multi-support point rotating construction turntable for bridge construction includes a connector; a connecting platform, the connecting platform is arranged at the upper end of the connector, and the upper end of the connector is fixedly connected with an arc block and a connecting block; and a rotating mechanism, the rotating mechanism includes a first annular frame, a lower rotating hinge ball, a placement frame, a beam frame and a connecting assembly, the first annular frame is fixedly connected to the connector, and the lower rotating hinge ball is fixedly connected to the side end of the first annular frame. By providing the rotating mechanism, the stability of the turntable can be better guaranteed when the beam frame is rotated, thereby further improving the overall stability of the device, so that the bridge surface can be better rotated, thereby improving the overall efficiency of bridge construction and improving the functionality and stability of the device.

[0004] Although the above patent document can make the bridge deck rotate better, in the T-structure rotation construction scheme adopted in the prior art, a rigid connection is usually adopted after the beam sections are closed. Once a deviation occurs, it is difficult to adjust, which not only affects the structural safety of the bridge, but also may affect the subsequent bridge deck system construction. If it encounters external loads such as earthquakes and strong winds, the traditional rigidly connected T-structure bridge is prone to damage, and the existing T-structure rotation construction technology lacks effective reset measures, and it is difficult to ensure the safety of the bridge under external loads; some existing rotation construction technologies, in order to improve safety or accuracy, often need to add additional equipment or processes, resulting in a complicated construction process and increased costs; especially in the environment close to electrified railways, the monitoring and control requirements for the rotation process are higher, but the existing monitoring and control technologies are often difficult to meet the requirements. Summary of the invention

[0005] In view of the deficiencies of the prior art, the object of the present invention is to provide a large-span T-structure rotation construction method near an electrified railway, which not only reduces the risk of collision with the existing electrified railway during the construction process, but also improves the closing accuracy and convenience of adjustment, while reducing the impact on railway operations, achieving safe and efficient T-structure rotation construction, and effectively solving the problem that in the T-structure rotation construction scheme adopted in the prior art, a rigid connection is usually adopted after the beam section is closed. Once a deviation occurs, it is difficult to adjust, which not only affects the structural safety of the bridge, but also may affect the subsequent bridge deck system construction. If it encounters external loads such as earthquakes and strong winds, the traditional rigid connection T-structure bridge is prone to damage, and the existing T-structure rotation construction technology lacks effective reset measures, and it is difficult to ensure the safety of the bridge under the external load; some existing rotation construction technologies, in order to improve safety or accuracy, often need to add additional equipment or processes, resulting in a complicated construction process and increased costs; especially in the environment near the electrified railway, the monitoring and control requirements for the rotation process are higher, but the existing monitoring and control technologies are often difficult to meet the requirements.

[0006] To achieve the above object, the present invention provides the following technical solution: a large-span T-structure rotation construction method near an electrified railway, the construction method comprising the following steps:

[0007] S1, bridge piers are erected on both sides of the existing railway line, and rotating devices are installed on the top of the piers;

[0008] S2, the first and second beam sections of the prefabricated T-structure bridge;

[0009] S3, hoisting the prefabricated first beam segment and the second beam segment to the top of the corresponding bridge pier, and connecting them to the corresponding rotating device. After hoisting, the first beam segment and the second beam segment are at a certain angle to the existing railway line, and the first beam segment and the second beam segment are inspected and adjusted;

[0010] S4, starting the rotating device to horizontally rotate the first beam segment and the second beam segment around the center of the bridge pier respectively, so that they are coaxial with the bridge axis;

[0011] S5, installing a reset-type modular connection device between the first beam segment and the second beam segment;

[0012] S6, carry out bridge deck construction.

[0013] As a further improvement of the present invention, in step S4, the left-side rotating device is first started to rotate the first beam segment horizontally around the center of the left-side bridge pier so that it is coaxial with the bridge axis; after the rotation of the first beam segment is completed, the right-side rotating device is started to rotate the second beam segment horizontally around the center of the right-side bridge pier so that it is coaxial with the bridge axis, and the second beam segment maintains a certain distance from the first beam segment.

[0014] As a further improvement of the present invention, the reset-type modular connection device includes a first connecting member, a second connecting member, a pad and a plurality of elastic reset parts, the first connecting member is connected to the first beam section, and the second connecting member and the pad are both connected to the second beam section.

[0015] As a further improvement of the present invention, a first groove is provided on the top of the first beam section, and a first connecting surface is provided on the side close to the existing railway line after the first beam section is rotated; the first connecting member is engaged in the first groove.

[0016] As a further improvement of the present invention, a second groove is provided on the top of the second beam section, and a second connecting surface is provided on the side close to the existing railway line after the second beam section is rotated, and the second connecting member and the pad are both engaged in the second groove; the second connecting member is located on the top of the pad.

[0017] As a further improvement of the present invention, one end of the elastic reset portion is fixedly connected to the first connection surface, and the other end of the elastic reset portion is fixedly connected to the second connection surface.

[0018] As a further improvement of the present invention, the depth L2 of the second groove and the depth L1 of the first groove have the following relationship: L2>L1.

[0019] As a further improvement of the present invention, the first connecting member includes a first comb-tooth steel plate, on which a first countersunk hole and a telescopic limit protrusion are provided; the second connecting member includes a second comb-tooth steel plate, on which a second countersunk hole and a telescopic limit groove are provided.

[0020] As a further improvement of the present invention, the elastic reset portion includes two elastic elements, a connecting stud and two connecting nuts, the two ends of the connecting stud respectively extend into the interiors of the left and right elastic elements and are connected through the connecting nuts, and a reset element and a limiting sleeve are also arranged between the two elastic elements.

[0021] As a further improvement scheme of the present invention, the elastic element comprises a first connecting plate, an elastic connecting member and a second connecting plate, one end of the elastic connecting member is fixedly connected to the first connecting plate, and the other end is fixedly connected to the second connecting plate, the elastic connecting member is S-shaped in shape, the first connecting plate and the second connecting plate are both rectangular structures, a first through hole is provided on the first connecting plate, a second through hole is provided on the elastic connecting member, the specification of the first through hole corresponds to the specification of the second through hole, a third through hole and a limiting sleeve mounting threaded hole are provided on the second connecting plate, and several limiting sleeve mounting threaded holes are distributed along the central circumference of the third through hole; the number of the limiting sleeves is two, the limiting sleeve is detachably connected to the elastic element, the limiting sleeve comprises a connecting base plate and a half sleeve, the connecting base plate and the half sleeve are fixedly connected, and a fourth through hole is provided on the connecting base plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The present invention can comprehensively improve construction efficiency and inherent safety. Through a series of measures such as beam segment prefabrication, hoisting, and reset-type modular connection devices, the present invention not only improves the closing accuracy and convenience of adjustment, but also significantly reduces construction risks and the impact on railway operations, thereby achieving safe and efficient T-structure rotation construction.

[0024] (2) The present invention can reduce the risk of collision and ensure construction safety. Specifically, the present invention prefabricates the beam section and hoists it to a specific location to ensure that it does not interfere with the existing railway line and its ancillary facilities during the inspection and rotation process, thereby ensuring construction safety.

[0025] (3) The present invention can enhance the seismic performance of the bridge and provide reset capability; specifically, the elastic reset portion provided in the present invention enables the bridge to produce a certain deformation when subjected to external loads such as earthquakes and strong winds, and to return to its original position after the load disappears, thereby enhancing the seismic performance of the bridge and ensuring the safety of the bridge under external loads.

[0026] (4) The present invention can improve the closing accuracy and facilitate subsequent adjustments. Specifically, the present invention adopts a reset-type modular connection device to achieve a retractable connection between beam sections, allowing adjustments within a certain range. This not only improves the closing accuracy, but also facilitates fine-tuning after closing, ensuring that the bridge line shape and stress state meet the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a construction flow chart of the present invention;

[0028] Figure 2 It is a top view of the positional relationship between the existing railway line and the bridge piers of the present invention;

[0029] Figure 3 is a front view of the present invention;

[0030] Figure 4 is a structural schematic diagram of the first beam section of the present invention;

[0031] Figure 5 is a structural schematic diagram of the second beam section of the present invention;

[0032] Figure 6 is a three-dimensional schematic diagram of the resettable modular connection device of the present invention;

[0033] Figure 7 The present invention Figure 6 Another perspective of the three-dimensional map;

[0034] Figure 8 It is a structural schematic diagram of the elastic reset portion of the present invention;

[0035] Fig. 9 is a schematic structural diagram of the elastic element of the present invention;

[0036] Fig.10 It is a structural schematic diagram of the limiting sleeve of the present invention.

[0037] In the figure: 100, existing railway line; 200, bridge pier; 300, rotating device; 400, first beam section; 401, first groove; 402, first connecting surface; 500, second beam section; 501, second groove; 502, second connecting surface; 600, first connecting member; 610, first comb-tooth steel plate; 611, first countersunk hole; 612, telescopic limit protrusion; 700, second connecting member; 710, second comb-tooth steel plate; 711, first countersunk hole; 712, telescopic limit protrusion Shrink limit groove; 800, pad; 900, elastic reset part; 910, elastic element; 911, first connecting plate; 912, elastic connector; 913, second connecting plate; 914, first through hole; 915, second through hole; 916, third through hole; 917, limit sleeve mounting threaded hole; 920, connecting stud; 930, connecting nut; 940, reset element; 950, limit sleeve; 951, connecting bottom plate; 952, half sleeve; 953, fourth through hole. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be pointed out that the terms "upper", "lower", "left", "right", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0040] It should be understood that, in the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense.

[0041] Example 1: See attached Figures 1 to 10 , this embodiment 1 provides a large-span T-structure rotation construction method near an electrified railway, the construction method comprising the following steps:

[0042] S1, erection of bridge piers and rotating devices: erect bridge piers 200 on both sides of the existing railway line 100,

[0043] A rotating device 300 is provided on the top of the pier 200;

[0044] S2, beam segment prefabrication: prefabricate the first beam segment 400 and the second beam segment 500 of the T-shaped bridge in a site adjacent to the electrified railway;

[0045] S3, beam segment hoisting and adjustment: hoist the prefabricated first beam segment 400 and the second beam segment 500 to the top of the corresponding bridge pier 200, and connect them to the corresponding rotating device 300. After hoisting, the first beam segment 400 and the second beam segment 500 are at a certain angle to the existing railway line 100, that is, the first beam segment 400 and the second beam segment 500 are not above the existing railway line 100. Check and adjust the first beam segment 400 and the second beam segment 500 to prevent the first beam segment 400 and the second beam segment 500 from colliding with the auxiliary facilities of the existing railway line 100 during the rotation process;

[0046] S4, beam segment rotation: start the rotation device 300 to horizontally rotate the first beam segment 400 and the second beam segment 500 around the center of the bridge pier 200 so as to be coaxial with the bridge axis;

[0047] S5, installation of connection device: installing a reset-type modular connection device between the first beam segment 400 and the second beam segment 500;

[0048] S6, bridge deck construction: carry out bridge deck construction.

[0049] In step S4, the left rotating device 300 is first started to rotate the first beam segment 400 horizontally around the center of the left pier 200 to make it coaxial with the bridge axis; after the rotation of the first beam segment 400 is completed, the right rotating device 300 is started to rotate the second beam segment 500 horizontally around the center of the right pier 200 to make it coaxial with the bridge axis, and the second beam segment 500 maintains a certain distance from the first beam segment 400.

[0050] It should be noted that, see Figure 2 When piers 200 are erected on both sides of the existing railway line 100 and a rotating device 300 is set on the top of the piers 200, the erection position of the piers 200 should be determined according to the design requirements of the bridge and the actual situation on site to ensure that the piers 200 have sufficient bearing capacity and stability. The rotating device 300 is an important part of realizing the horizontal rotation of the T-beam section. The rotating device 300 is an existing mature technology. It usually consists of a ball joint, a turntable, a driving device, a limit device and a monitoring system. The ball joint is the core of the rotating device, which is composed of an upper ball joint, a lower ball joint and a spherical pad. The upper ball joint is connected to the beam section, and the lower ball joint is connected to the bridge pier. The spherical pad reduces friction and transfers load. The turntable is used to assist rotation in large rotating devices, including a base, a track, a roller and a driving device. The driving device provides the rotation power, usually using a jack or an electric winch, requiring sufficient output force and precise control. The limit device prevents accidents during the rotation process and limits the rotation angle of the beam section.

[0051] It is not difficult to understand that the ancillary facilities of the existing railway line 100 refer to various equipment and facilities that ensure the operation of the railway in addition to the track. When the construction is close to the electrified railway, special attention must be paid to protecting these facilities. Common ancillary facilities include: overhead lines that supply power to electric locomotives; signal equipment that ensures driving safety and improves efficiency; communication equipment used for transportation command, dispatching and information transmission; power equipment that supplies power for signals, communications, lighting, etc.; protective facilities to prevent people, animals, etc. from entering the railway limits; and drainage facilities that remove rainwater and accumulated water to maintain the stability of the line.

[0052] In step S2, the first beam section 400 and the second beam section 500 of the T-structure bridge are prefabricated in a site adjacent to the electrified railway. The prefabrication of the beam sections should be carried out strictly in accordance with the requirements to ensure that the geometric dimensions, strength and stiffness of the beam sections meet the requirements. The prefabrication site should be selected at a certain safe distance from the existing railway line to avoid the prefabrication process affecting the railway operation.

[0053] The reset-type modular connection device includes a first connection member 600 , a second connection member 700 , a pad 800 and a plurality of elastic reset parts 900 . The first connection member 600 is connected to the first beam section 400 , and the second connection member 700 and the pad 800 are both connected to the second beam section 500 .

[0054] A first groove 401 is disposed on the top of the first beam section 400 . After the first beam section 400 is rotated, a first connecting surface 402 is disposed on a side close to the existing railway line 100 . The first connecting member 600 is engaged in the first groove 401 .

[0055] A second groove 501 is provided at the top of the second beam section 500. After the second beam section 500 is rotated, a second connecting surface 502 is provided on the side close to the existing railway line 100. The second connecting member 700 and the pad 800 are both engaged in the second groove 501. The second connecting member 700 is located at the top of the pad 800, and a retractable connection is formed between the second connecting member 700 and the first connecting member 600.

[0056] The depth L2 of the second groove 501 and the depth L1 of the first groove 401 have the following relationship: L2>L1.

[0057] One end of the elastic restoring portion 900 is fixedly connected to the first connecting surface 402 , and the other end of the elastic restoring portion 900 is fixedly connected to the second connecting surface 502 .

[0058] The first connecting member 600 includes a first comb-tooth steel plate 610, which is provided with a first countersunk hole 611 and a telescopic limit protrusion 612; the second connecting member 700 includes a second comb-tooth steel plate 710, which is engaged with the first comb-tooth steel plate 610, and is provided with a second countersunk hole 711 and a telescopic limit groove 712.

[0059] The elastic reset part 900 includes two elastic elements 910, a connecting stud 920 and two connecting nuts 930. The two ends of the connecting stud 920 extend into the interior of the left and right elastic elements 910 respectively and are connected through the connecting nuts 930. A reset element 940 and a limiting sleeve 950 are also arranged between the two elastic elements 910, and the connecting stud 920 passes through the reset element 940.

[0060] The elastic element 910 includes a first connecting plate 911, an elastic connector 912, and a second connecting plate 913. One end of the elastic connector 912 is fixedly connected to the first connecting plate 911, and the other end is fixedly connected to the second connecting plate 913. The elastic connector 912 is S-shaped. The material of the elastic connector 912 is usually one of carbon steel spring steel, low manganese spring steel, silicon manganese spring steel, or chrome vanadium steel. The first connecting plate 911 and the second connecting plate 913 are both rectangular parallelepiped structures. The first connecting plate 911 is provided with a first through hole 914, and the elastic connector 912 is provided with a second through hole 915. Through hole 915, the specifications of the first through hole 914 correspond to the specifications of the second through hole 915, and the second connecting plate 913 is provided with a third through hole 916 and a limiting sleeve mounting threaded hole 917, and a plurality of limiting sleeve mounting threaded holes 917 are distributed along the central circumference of the third through hole 916; the number of limiting sleeves 950 is two, and the limiting sleeve 950 is detachably connected to the elastic element 910, and the limiting sleeve 950 includes a connecting base plate 951 and a half sleeve 952, and the connecting base plate 951 and the half sleeve 952 are fixedly connected, and the connecting base plate 951 is provided with a fourth through hole 953.

[0061] It should be noted that when installing the elastic reset part 900, it is first necessary to adjust the position of the connecting nut 930 away from the limiting sleeve 950, compress the reset element 940, make the installation direction dimension of the elastic reset part 900 smaller than the distance between the first beam section 400 and the second beam section 500, install one end of the elastic reset part 900 on the second connecting surface 502 through bolt fasteners, then loosen the above-mentioned connecting nut 930 to the set position, and install the other end of the elastic reset part 900 on the first connecting surface 402 through bolt fasteners. The reset element 940 is usually a spring. In actual installation, a spring of appropriate specifications is selected according to the distance between the first beam section 400 and the second beam section 500 after rotation and the size of the elastic reset part 900. When the elastic reset part 900 is installed, the spring selected for the reset element 940 is slightly in a compressed state in the initial state, so that the first beam section 400 and the second beam section 500 are both slightly squeezed by the installation of the elastic reset part 900.

[0062] When the first beam section 400 and the second beam section 500 tend to collide with each other, the previously compressed reset element 940 is further compressed, and the elastic connector 912 is also compressed, so that the reset element 940 and the elastic connector 912 simultaneously generate a greater reverse elastic force on the corresponding beam sections, offsetting the trend of further reduction of the gap between the two beam sections, and resetting the two beam sections.

[0063] It is not difficult to understand that bolts are embedded on both the first beam section 400 and the second beam section 500. When the first connecting member 600 is connected to the first beam section 400, the embedded bolts on the first beam section 400 will pass through the first countersunk hole 611. When the second connecting member 700 is connected to the second beam section 500, the embedded bolts on the second beam section 500 will pass through the through hole and the second countersunk hole 711 on the pad 800.

[0064] Specifically, after step S4 is completed, after the first beam section 400 and the second beam section 500 complete the rotation, the existing railway line 100 is temporarily closed for a period of time, the embedded bolts of the first beam section 400 are passed through the first countersunk hole 611 and tightened by a cap nut, and the embedded bolts of the second beam section 500 are passed through the through hole and the second countersunk hole 711 on the pad 800 and tightened by a cap nut. At this time, the telescopic limit protrusion 612 is engaged with the telescopic limit groove 712, and at the same time, a plurality of elastic reset parts 900 can be quickly installed between the first connecting surface 402 and the second connecting surface 502. The entire installation process is quick, the temporary closure time of the existing railway line 100 is short, and the impact on railway operations is reduced.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for constructing a large-span T-structure rotation near an electrified railway, characterized in that: The construction method comprises the following steps: S1, erecting bridge piers (200) on both sides of an existing railway line (100), and installing a rotating device (300) on top of the bridge piers (200); S2, a first beam section (400) and a second beam section (500) of a prefabricated T-structure bridge; S3, hoisting the prefabricated first beam section (400) and the second beam section (500) to the top of the corresponding bridge pier (200), and connecting them to the corresponding rotating device (300), after hoisting, the first beam section (400) and the second beam section (500) are respectively at a certain angle with the existing railway line (100), and the first beam section (400) and the second beam section (500) are inspected and adjusted; S4, starting the rotating device (300) to horizontally rotate the first beam section (400) and the second beam section (500) around the center of the bridge pier (200) so that they are coaxial with the bridge axis; S5, installing a reset-type modular connection device between the first beam section (400) and the second beam section (500); S6, carry out bridge deck construction.

2. The method for constructing a large-span T-structure rotation structure near an electrified railway according to claim 1, characterized in that: In step S4, the left rotating device (300) is first started to rotate the first beam section (400) horizontally around the center of the left bridge pier (200) so that it is coaxial with the bridge axis; after the rotation of the first beam section (400) is completed, the right rotating device (300) is started again to rotate the second beam section (500) horizontally around the center of the right bridge pier (200) so that it is coaxial with the bridge axis, and the second beam section (500) is kept at a certain distance from the first beam section (400).

3. The method for constructing a large-span T-structure rotation structure near an electrified railway according to claim 1, characterized in that: The reset-type modular connection device comprises a first connection member (600), a second connection member (700), a pad (800) and a plurality of elastic reset parts (900), wherein the first connection member (600) is connected to the first beam section (400), and the second connection member (700) and the pad (800) are both connected to the second beam section (500).

4. The method for constructing a large-span T-structure rotation structure near an electrified railway according to claim 3, characterized in that: A first groove (401) is provided at the top of the first beam section (400); a first connecting surface (402) is provided on the side of the first beam section (400) close to the existing railway line (100) after the first beam section (400) is rotated; and the first connecting member (600) is engaged in the first groove (401).

5. The method for constructing a large-span T-structure rotation structure near an electrified railway according to claim 4, characterized in that: A second groove (501) is provided at the top of the second beam section (500); after the second beam section (500) is rotated, a second connecting surface (502) is provided on the side close to the existing railway line (100); the second connecting member (700) and the pad (800) are both engaged in the second groove (501); and the second connecting member (700) is located at the top of the pad (800).

6. The method for constructing a large-span T-structure rotation structure near an electrified railway according to claim 5, characterized in that: One end of the elastic reset portion (900) is fixedly connected to the first connection surface (402), and the other end of the elastic reset portion (900) is fixedly connected to the second connection surface (502).

7. The method for constructing a large-span T-structure rotation structure near an electrified railway according to claim 5, characterized in that: The depth L2 of the second groove (501) and the depth L1 of the first groove (401) are in the following relationship: L2>L1.

8. The method for constructing a large-span T-structure rotation structure near an electrified railway according to claim 5, characterized in that: The first connecting member (600) comprises a first comb-tooth-shaped steel plate (610), on which a first countersunk hole (611) and a telescopic limiting protrusion (612) are provided; the second connecting member (700) comprises a second comb-tooth-shaped steel plate (710), on which a second countersunk hole (711) and a telescopic limiting groove (712) are provided.

9. The method for constructing a large-span T-structure rotation structure near an electrified railway according to claim 5, characterized in that: The elastic reset portion (900) comprises two elastic elements (910), a connecting stud (920) and two connecting nuts (930); the two ends of the connecting stud (920) respectively extend into the interior of the two elastic elements (910) on the left and right and are connected via the connecting nuts (930); a reset element (940) and a limiting sleeve (950) are also provided between the two elastic elements (910).

10. The method for constructing a large-span T-structure rotation structure near an electrified railway according to claim 9, characterized in that: The elastic element (910) comprises a first connecting plate (911), an elastic connecting member (912) and a second connecting plate (913); one end of the elastic connecting member (912) is fixedly connected to the first connecting plate (911), and the other end is fixedly connected to the second connecting plate (913); the elastic connecting member (912) is S-shaped in shape; the first connecting plate (911) and the second connecting plate (913) are both rectangular parallelepiped structures; the first connecting plate (911) is provided with a first through hole (914); the elastic connecting member (912) is provided with a second through hole (915); the specifications of the first through hole (914) and the second through hole (915) are similar in size. The specifications of the hole (915) correspond to those of the second connecting plate (913), a third through hole (916) and a limiting sleeve mounting threaded hole (917) are provided on the second connecting plate (913), and a plurality of the limiting sleeve mounting threaded holes (917) are distributed along the central circumference of the third through hole (916); the number of the limiting sleeves (950) is two, and the limiting sleeves (950) are detachably connected to the elastic element (910), and the limiting sleeves (950) include a connecting base plate (951) and a half sleeve (952), and the connecting base plate (951) and the half sleeve (952) are fixedly connected, and a fourth through hole (953) is provided on the connecting base plate (951).

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