D-shaped beam overhead jacking method

Abstract

The invention discloses a D-shaped beam overhead jacking method. A prefabricated overhead system is formed by a D-shaped beam, a cross beam, a steel rail, a guard rail, a bridge sleeper and other components to reinforce an existing railway. In the construction process, firstly, a construction platform is built offline, and components such as D-shaped beams, cross beams, steel rails, guard rails and bridge pillows are assembled into an overhead system on the platform. And then the work of dismantling old rails and laying temporary guide rails can be carried out, and meanwhile the overhead system can be horizontally moved. And after the overhead system is moved to a specified position, the whole overhead system is moved to an overhead section by using a special moving trolley and a temporary guide rail, so that the connection and installation work of the rail can be carried out. After connection and installation, excavation of a lower line and jacking of the box culvert can be carried out according to regulations, and after jacking construction is completed, follow-up work of dismounting of overhead equipment and repairing and recovering of the line can be carried out; the construction efficiency and benefits are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of railway construction, in particular to a method for overhead jacking of a D-shaped beam. Background Art

[0002] With the continuous improvement of the national road network construction, it is becoming more and more common for highways and urban roads to pass under existing railways. In the case of passing under existing railways, especially in busy railway projects, railway operations generally cannot be easily interrupted. Under normal conditions, the construction method of overhead and passing under the existing operating railway has become relatively mature and has been widely used in various municipal projects under the existing railway projects.

[0003] However, at present, overhead construction has problems such as long construction period, great interference with transportation, high safety risks, and low efficiency, which have led to obvious limitations in the application space and development prospects of overhead construction. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a D-beam overhead jacking method, which solves a series of problems existing in jacking construction, such as long construction time, great transportation interference, low efficiency, high safety risks, and low quality standards.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a D-beam overhead jacking method, comprising the following steps:

[0006] S1. Construction preparation: Before the overhead construction of the line, prepare the materials required for the overhead system. Professionals use special machinery, tools and materials to build and assemble the construction platform, and conduct inspections and acceptance according to procedures to ensure that the construction platform is safe and reliable;

[0007] S2. Assemble the D-beam overhead system: Assemble the D-beam overhead system on the construction platform outside the track. After the D-beam overhead system is assembled, use hydraulic lifting to conduct trial lifting and trial lowering tests;

[0008] S3. Dismantling of old lines: Cut the two ends of the track in the section that needs to be elevated, remove the rails and sleepers in the middle, and excavate the width and depth of the ballast bed as required to ensure the physical space required for the movement and alignment of the elevated system;

[0009] S4. Laying temporary guide rails: Repair the excavated track bed, then install temporary running rails and sleepers according to the original line, connect the temporary running rails with the existing tracks for temporary support to facilitate the subsequent overhead system advancement track;

[0010] S5. Overhead system translation: by laying a transverse guide rail perpendicular to the existing railway at the bottom of the overhead system, the overhead system is translated to the existing line by a mobile trolley, then lifted and lowered onto the track by a hydraulic lifting device, and moved longitudinally to the construction site;

[0011] S6. Overhead system advancement: Use a mobile trolley to advance the overhead system onto the temporary guide rail, and continue to move it longitudinally to the overhead section until it is accurately aligned with the track that needs to be replaced;

[0012] S7, track connection: After the overhead system of the line is in place, the overhead system is lifted by hydraulic lifting equipment, the mobile trolley is pulled out from under the overhead system, and the running rails and sleepers are pulled out in turn. Then the overhead system is lifted and lowered by hydraulic lifting equipment to ensure that the rails at both ends of the prefabricated components on the overhead system are accurately aligned with the ends of the existing tracks, and the new tracks are connected to the old tracks with reinforcing bolts to form a complete track system. Finally, quality inspection work is carried out according to the prescribed procedures to ensure that the line meets the conditions for both opening and operation and jacking construction.

[0013] S8, Jacking construction: After the track is connected, the line can be excavated according to regulations, and the box culvert can be jacked until the box culvert is in place, and ballast is added for tamping;

[0014] S9, overhead equipment removal: remove the longitudinal beams and hoist them down the track. During this period, at least two cross beams are left at both ends of each longitudinal beam before hoisting to ensure the stability of the beam body. Then the overhead cross beams are pulled out and the ballast is backfilled and tamped. Ballast is added and tamped in the construction area to ensure the stability of the line.

[0015] S10, Repair and restore the line: Carry out line repair and restoration work. After the line passes the inspection according to the procedures, the speed can be increased step by step according to the regulations until the normal speed is restored;

[0016] S11. Automatic monitoring of railway operation: Track status automatic monitoring system monitoring personnel take turns to be on duty at the system monitoring post 24 hours a day, monitor the data of the track status automatic monitoring system manually and complete notification, warning, analysis and recording of abnormal data.

[0017] As a further improvement of the present invention, the overhead system includes prefabricated railway tracks and D-shaped construction beams; the prefabricated railway tracks include steel rails, sleepers and wheel guard rails, the sleeper spacing is set as required, and a new type of bridge sleeper is used to meet the requirement of large-scale mechanical tamping operations without removing the wheel guard rails, and the steel rail spacing adopts the standard track gauge of 1435mm.

[0018] As a further improvement of the present invention, the D-beam overhead system includes segmented D-beams at both ends, an overhead crossbeam in the middle, a monitoring system and a hydraulic lifting device. The overhead crossbeam and the segmented D-beams at both ends are in a vertical relationship. The rails and wheel guard rails are installed perpendicular to the crossbeams. The sleepers are arranged alternately in parallel with the crossbeams and are connected to the rails through fasteners and bolts. A gusset plate positioning hole is provided on the upper part of the overhead crossbeam, and fasteners are provided on both sides of the rails to prevent the rails from sliding laterally. The gusset plate positioning hole and the orifice plate positioning support are connected by bolts. The gusset plate positioning support in the rail fastener is directly connected to the side rib plate of the crossbeam, and the lateral adjustment amount is 50 mm. The adjustable gusset plate is fine-tuned along the direction of the rail, and the maximum lateral adjustment amount is 32 mm. The adjustable gusset plate must be fastened to the rail when installed.

[0019] As a further improvement of the present invention, the segmented D-beam is composed of multiple D-beam sections, and the sizes of the D-beam include D12, D16, D20, and D24. The D-beam sections are connected as a whole by fixed plates, and the overall length and the track length meet the requirements of the overhead system; the segmented D-beam is connected to the overhead crossbeam by connecting plates and corbels.

[0020] As a further improvement of the present invention, the hydraulic lifting equipment is located at both ends of the longitudinal beam and is fixedly connected to the longitudinal beam; two hydraulic lifting equipment are placed on both sides of each longitudinal beam for raising and lowering the overhead system.

[0021] As a further improvement of the present invention, the mobile trolley includes a transverse moving trolley and a longitudinal moving trolley, which are used for the transverse and longitudinal movement of the overhead system; the transverse moving trolley is composed of a platform and four wheels, the wheels are located at the four corners of the trolley, and a steel structure is adopted. The lateral spacing between the wheels is the same as the track gauge; the special longitudinal moving trolley also includes two hydraulic lifting equipment arranged on both sides of each wheel along the longitudinal direction, and the spatial position adjustment of the overhead system is realized in combination with specific working conditions.

[0022] As a further improvement of the present invention, the transverse guide rail system is two parallel steel rails, and the spatial positions of both ends of the guide rails can be freely adjusted; two transverse moving trolleys are placed on each set of guide rails, and the D-shaped beam is placed on the transverse moving trolley for transverse translation.

[0023] As a further improvement of the present invention, the monitoring system includes two types of monitoring devices, AB, installed, an indoor system host, a data acquisition and communication extension, a connection adapter box and cables, which are used to calculate the track signal to determine whether the geometric dimensions of the track line exceed the allowable deviation management standard, and realize real-time display of monitoring data and timely alarm of over-limit status.

[0024] As a further improvement of the present invention, a type A monitoring device is installed between two rails to detect the gauge and horizontal height difference changes between the reference rail and the other rail; a type B monitoring device is installed between the reference rail and the crossbeam of the overhead beam to detect the horizontal displacement and height difference changes of the reference rail relative to the crossbeam; the QR code of the overhead system bridge sleeper is managed by information technology and uploaded to the indoor host, and the material model, specification, casting time, curing time, tensioning and grouting time of the overhead system as well as the process self-inspection, mutual inspection and special inspection can be obtained according to the QR code of the bridge sleeper.

[0025] As a further improvement of the present invention, the data acquisition communication extension and the indoor host communicate via the network, the edge end is configured accordingly by the data acquisition communication extension, and the management end is the indoor computer; the system communication adopts transparent communication equipment, supports 4G full network access, industrial-grade design, has the characteristics of high efficiency and low latency, and supports network transparent transmission and protocol transparent transmission; the SIM card is configured to realize network communication, and the system user applies for two SIM cards and inserts them into the designated position of the communication equipment to provide cost support for the system network data communication data traffic.

[0026] The beneficial effects of the present invention are:

[0027] (1) Minimal transportation interference. The construction organization is optimized and can be completed within 1-2 skylight points (the traditional method generally takes about a month), which greatly reduces transportation interference.

[0028] (2) High safety and quality. Reduce the number of times on the line, disturb the line at one time, have strong overall ability, good equipment quality, safety and stability, and low risks for personal safety and construction safety.

[0029] (3) Make good use of the overall plan. By using offline overall assembly, the number of steps for replacing bridge sleepers and installing guardrails is reduced, ensuring construction safety and progress.

[0030] (4) The benefits and efficiency are significantly improved. Construction can be carried out 24 hours a day outside the network, with little interference from construction and transportation, a high degree of mechanization, and fewer people working at one time. Bridge sleepers and guardrails can be assembled in advance, resulting in high construction efficiency and good production benefits.

[0031] (5) It replaces the traditional mode of manual on-track inspection. Construction units can carry out targeted repairs on over-limited areas of the track according to the system's detection results, reducing the number of times personnel go on the track, which can not only reduce the personal safety risks of construction workers on operating lines, but also ensure railway driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A side view of a rail fastener system in an embodiment of the present invention;

[0033] Figure 2It is an elevation view, a side view and a top view of a D-beam railway overhead system in an embodiment of the present invention;

[0034] Figure 3 A three-dimensional diagram of a sleeper and an I-beam steel rail in an embodiment of the present invention;

[0035] Figure 4 It is a construction flow chart of an embodiment of the present invention;

[0036] Figure 5 A mobile car in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of an overhead system in an embodiment of the present invention;

[0038] Figure 7 This is a plan distribution diagram of the monitoring device in an embodiment of the present invention;

[0039] Figure 8 It is the network information mode of the monitoring system in the embodiment of the present invention;

[0040] Fig. 9 1 is a system function diagram in an embodiment of the present invention.

[0041] Reference numerals:

[0042] 1. Positioner; 2. I-beam rail; 3. Adjustable buckle plate; 4. High-strength bolts; 5. Longitudinal beam; 6. Cross beam; 7. Connecting plate; 8. Corbel; 9. Sleeper; 10. Oil cylinder. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] Example

[0045] A D-beam overhead jacking method uses a prefabricated overhead system composed of D-beams, crossbeams, rails, wheel guard rails, bridge sleepers and other components to reinforce the existing railway. During the construction process, a construction platform is first built offline, and the D-beams, crossbeams, rails, wheel guard rails, bridge sleepers and other components are assembled into an overhead system on the platform. Subsequently, the old track can be dismantled, temporary guide rails can be laid, and the overhead system can be moved horizontally at the same time. After the overhead system is moved to the designated location, a special mobile trolley and temporary guide rails are used to move the entire overhead system to the overhead section, and the track connection and installation work can be carried out. After the connection and installation, the excavation of the lower line and the jacking of the box culvert can be carried out according to regulations. After the jacking construction is completed, the subsequent work of dismantling the overhead equipment and repairing and restoring the line can be carried out.

[0046] like Figure 1-Figure 9As shown, a method for overhead jacking of a D-beam is used, which uses a prefabricated overhead system composed of components such as a D-beam, a crossbeam, a rail, a wheel guard rail, and a bridge sleeper to reinforce an existing railway, and a positioner 1 is provided on the railway, comprising the following steps:

[0047] S1. Construction preparation. Before the overhead construction of the line, prepare the materials required for the overhead system, and trained professionals use special machinery, tools and materials to build and assemble the construction platform, and conduct inspections and acceptance according to procedures to ensure that the construction platform is safe and reliable.

[0048] S2. Assemble the D-beam overhead system. Assemble the D-beam overhead system on the construction platform outside the track, which mainly includes: frame structure components such as longitudinal beams 5 and cross beams 6 and prefabricated track components such as I-beam rails 2, wheel guard rails, bridge sleepers 9. After the D-beam overhead system is assembled, use hydraulic lifting to conduct trial lifting and trial lowering tests. The QR code of the bridge sleepers of the overhead system is managed and uploaded to the indoor host computer. According to the QR code of the bridge sleepers, the material model, specification, pouring time, curing time, tensioning and grouting time of the overhead system, as well as the process self-inspection, mutual inspection and special inspection can be obtained.

[0049] S3. Dismantle the old line. Cut the two ends of the track in the section that needs to be elevated, remove the rails and sleepers 9 in the middle, and excavate the width and depth of the ballast bed according to regulations to ensure the physical space required for the movement and alignment of the elevated system.

[0050] S4. Lay temporary rails. Repair the excavated track bed, then install temporary running rails and sleepers according to the original line, and connect the temporary running rails with the existing tracks. The track serves as a temporary support and is used as the propulsion track for the subsequent overhead system.

[0051] S5. Overhead system translation. While carrying out steps S3 and S4, information transmission equipment can be set at the predetermined track position and the overall horizontal movement of the overhead system can be carried out. A horizontal guide rail perpendicular to the existing railway is laid at the bottom of the overhead system, and the overhead system is translated to the existing line by a special mobile trolley. The position information of the overhead system is determined by the monitoring equipment. When it reaches the designated position, the monitoring equipment receives the signal from the equipment and transmits it to the indoor host through the cable. As the command is transmitted to the special mobile trolley, the trolley receives the command and issues an alarm when it reaches the designated position until the overhead system is translated to the predetermined position, and then lifted and lowered onto the track by hydraulic lifting equipment, and moved longitudinally to the construction site.

[0052] S6. Overhead system advancement. Use a special mobile trolley to advance the overhead system onto the temporary guide rail, and continue to move longitudinally to the overhead section until it is accurately aligned with the track that needs to be replaced. During the longitudinal movement, the monitoring equipment is also used to determine the position information of the overhead system. When it reaches the designated position, the monitoring device receives a signal from the device and transmits it to the indoor host through a cable. As the command is transmitted to the special mobile trolley, the trolley receives the command and issues an alarm when it reaches the designated position until the overhead system moves horizontally to the predetermined position and passes the monitoring equipment.

[0053] S7, track connection. After the overhead system of the line is in place, the overhead system is raised by hydraulic lifting equipment, and the special mobile trolley is pulled out from under the overhead system, and the running rails and sleepers are pulled out in turn. Then the overhead system is raised and lowered by hydraulic lifting equipment to ensure that the rails 2 at both ends of the prefabricated components on the overhead system are accurately aligned with the ends of the existing tracks, and the new tracks are connected to the old tracks with high-strength bolts 4 to form a complete track system. Finally, quality inspection work is carried out according to the prescribed procedures to ensure that the line meets the conditions for both opening and operation and jacking construction.

[0054] S8. Jacking construction. After the track is connected, the line can be excavated according to regulations, and the box culvert can be jacked until it is in place, and ballast is added for tamping.

[0055] S9, overhead equipment removal. Remove the longitudinal beams and hoist them down the track. During this period, make sure that each longitudinal beam 5 has at least two cross beams 6 connected at both ends before hoisting to ensure the stability of the beam body. Then pull out the overhead cross beams 6 and backfill the ballast and tamp it. Ballast and tamp the construction area to ensure the stability of the line.

[0056] S10, repair and restore the line. After completing all construction steps, the final line repair and restoration work is carried out. After the line is inspected and qualified according to the procedures, the speed can be increased step by step according to regulations until the normal speed is restored. The overhead system includes two parts: railway tracks and D-type construction beams. The prefabricated railway tracks include rails, sleepers 9 and wheel guard rails. The sleeper spacing is set as required, and a new type of bridge sleeper is used to meet the requirement that the wheel guard rails do not need to be removed for large-scale mechanical tamping operations. The rail spacing adopts the standard track gauge of 1435mm.

[0057] S11. Automatic monitoring of the railway operation process. The track status automatic monitoring system monitoring personnel take turns to be on duty 24 hours a day, monitor the track status automatic monitoring system data uninterruptedly, and complete the notification, warning, analysis and recording of abnormal data. The warning must be based on facts, timely, and the warning records can trace the process.

[0058] The overhead system includes two parts: prefabricated railway tracks and D-shaped construction beams. The prefabricated railway tracks include rails, sleepers and wheel guard rails. The sleeper spacing is set as required, and a new type of bridge sleeper is used to meet the requirement that the wheel guard rails do not need to be removed during large-scale mechanical tamping operations. The rail spacing adopts the standard gauge of 1435mm.

[0059] The D-beam overhead system consists of segmented D-beams at both ends, an overhead crossbeam in the middle, a monitoring system and hydraulic lifting equipment. The overhead crossbeam and the segmented D-beams at both ends are in a vertical relationship. The overhead crossbeam is 3960×210×212mm in size and is made of I-beams. The rails and wheel guard rails are installed perpendicular to the crossbeam. The bridge sleepers are arranged alternately in parallel with the crossbeam and are connected to the rails through fasteners and bolts. A gusset plate positioning hole is set on the upper part of the overhead crossbeam, and fasteners are set on both sides of the rail to prevent the track from sliding horizontally. The gusset plate positioning hole is connected to the hole plate positioning support through bolts.

[0060] The segmented D-beam is composed of multiple D-beam segments, and the sizes of the D-beams include D12, D16, D20, and D24. The D-beam segments are connected as a whole by fixed plates, and the overall length and track length meet the requirements of the overhead system. The segmented D-beam is connected to the overhead crossbeam by a connecting plate 7 and a bracket 8.

[0061] The hydraulic lifting equipment is located at both ends of the longitudinal beam and is fixedly connected to the longitudinal beam. Two hydraulic lifting equipment are placed on each side of each longitudinal beam to raise and lower the overhead system.

[0062] The special mobile trolley is mainly divided into two types, which are used for the lateral and longitudinal movement of the overhead system. The lateral movement special mobile trolley B is composed of a platform and four wheels. The wheels are located at the four corners of the trolley and adopt a steel structure. The lateral spacing of the wheels is the same as the track gauge. The longitudinal movement special mobile trolley A has the same structure as trolley B. In addition, a cylinder 10 is set on both sides of each wheel along the longitudinal direction. Combined with specific working conditions, the spatial position adjustment of the overhead system can be achieved.

[0063] The transverse guide rail system consists of two parallel steel rails with a spacing of 1435mm. The two ends of the rails can be freely adjusted in space. Two special mobile trolleys B are placed on each set of rails, and the D-beam is placed on the special mobile trolley B for horizontal translation.

[0064] The gusset plate positioning support in the rail fastener is directly connected to the side rib plate of the crossbeam, with a lateral adjustment of 50 mm. The adjustable gusset plate 3 can be fine-tuned along the direction of the rail, with a maximum lateral adjustment of 32 mm. When installing the adjustable gusset plate 3, it must be fastened to the rail.

[0065] It consists of four parts: the installation of two types of monitoring devices, AB, an indoor system host, a data acquisition and communication extension, a connection adapter box and cables. It is used to calculate the track signal to determine whether the geometric dimensions of the track line exceed the allowable deviation management standard, and realize the real-time display of monitoring data and timely alarm of over-limit status.

[0066] There are two types of overhead system monitoring devices: Type A and Type B. Type A monitoring devices are installed between two rails to detect the track gauge and horizontal height difference between the reference rail and the other rail; Type B monitoring devices are installed between the reference rail and the crossbeam of the overhead beam to detect the horizontal displacement and height difference of the reference rail relative to the crossbeam. The QR code of the overhead system sleepers is managed and uploaded to the indoor host computer. The material model, specification, pouring time, curing time, tensioning and grouting time, and process self-inspection, mutual inspection, and special inspection of the overhead system can be obtained based on the QR code of the sleepers.

[0067] The data acquisition communication extension communicates with the indoor host through the network. The edge end is configured by the data acquisition communication extension, and the management end is the indoor computer. The system communication adopts transparent communication equipment, supports 4G full network access, industrial-grade design, has the characteristics of high efficiency and low latency, and supports network transparent transmission and protocol transparent transmission. SIM card configuration: To achieve network communication, system users need to apply for two SIM cards and insert them into the designated position of the communication equipment to provide cost support for the system network data communication data flow.

[0068] In projects that pass under existing railways, especially busy railways, railway operations cannot be easily interrupted. Under normal conditions, the construction method of suspending existing operating railways and passing under railways has become relatively mature and has been widely used in various municipal projects that pass under existing railways.

[0069] The invention includes the following functions: line track geometry monitoring, real-time data and waveform collection, historical curve observation, alarm threshold setting, display of alarm details, query and print monitoring data, manual input of related parameter settings for overhead beams and longitudinal beams, system entry into beam reset state, setting of initial values, and user information management

[0070] The D-beam overhead jacking method of the present invention overcomes a series of problems in jacking construction, such as long slow travel time, large transportation interference, low efficiency, high safety risk, and low quality standards. It is characterized in that a prefabricated overhead system is formed by components such as D-beams, crossbeams, rails, wheel guard rails, and bridge sleepers to reinforce the existing railway. During the construction process, a construction platform is first built offline, and components such as D-beams, crossbeams, rails, wheel guard rails, and bridge sleepers are assembled into an overhead system on the platform. Subsequently, the old track can be dismantled and temporary guide rails can be laid, and the overhead system can be translated at the same time. After the overhead system is moved to the designated position, a special mobile trolley and temporary guide rails are used to move the entire overhead system to the overhead section, and the track connection and installation work can be carried out. After the connection and installation, the lower line excavation and box culvert jacking work can be carried out according to regulations. After the jacking construction is completed, the subsequent work of dismantling the overhead equipment and repairing and restoring the line can be carried out.

[0071] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for overhead jacking of a D-beam, characterized in that: The following steps are involved: S1. Construction preparation: Before the overhead construction of the line, prepare the materials required for the overhead system. Professionals use special machinery, tools and materials to build and assemble the construction platform, and conduct inspections and acceptance according to procedures to ensure that the construction platform is safe and reliable; S2. Assemble the D-beam overhead system: Assemble the D-beam overhead system on the construction platform outside the track. After the D-beam overhead system is assembled, use hydraulic lifting to conduct trial lifting and trial lowering tests; S3. Dismantling of old lines: Cut the two ends of the track in the section that needs to be elevated, remove the rails and sleepers in the middle, and excavate the width and depth of the ballast bed as required to ensure the physical space required for the movement and alignment of the elevated system; S4. Laying temporary guide rails: Repair the excavated track bed, then install temporary running rails and sleepers according to the original line, connect the temporary running rails with the existing tracks for temporary support to facilitate the subsequent overhead system advancement track; S5. Overhead system translation: by laying a transverse guide rail perpendicular to the existing railway at the bottom of the overhead system, the overhead system is translated to the existing line by a mobile trolley, then lifted and lowered onto the track by a hydraulic lifting device, and moved longitudinally to the construction site; S6. Overhead system advancement: Use a mobile trolley to advance the overhead system onto the temporary guide rail, and continue to move it longitudinally to the overhead section until it is accurately aligned with the track that needs to be replaced; S7, track connection: After the overhead system of the line is in place, the overhead system is lifted by hydraulic lifting equipment, the mobile trolley is pulled out from under the overhead system, and the running rails and sleepers are pulled out in turn. Then the overhead system is lifted and lowered by hydraulic lifting equipment to ensure that the rails at both ends of the prefabricated components on the overhead system are accurately aligned with the ends of the existing tracks, and the new tracks are connected to the old tracks with reinforcing bolts to form a complete track system. Finally, quality inspection work is carried out according to the prescribed procedures to ensure that the line meets the conditions for both opening and operation and jacking construction. S8, Jacking construction: After the track is connected, the line can be excavated according to regulations, and the box culvert can be jacked until the box culvert is in place, and ballast is added for tamping; S9, overhead equipment removal: remove the longitudinal beams and hoist them down the track. During this period, at least two cross beams are left at both ends of each longitudinal beam before hoisting to ensure the stability of the beam body. Then the overhead cross beams are pulled out and the ballast is backfilled and tamped. Ballast is added and tamped in the construction area to ensure the stability of the line. S10, Repair and restore the line: Carry out line repair and restoration work. After the line passes the inspection according to the procedures, the speed can be increased step by step according to the regulations until the normal speed is restored; S11. Automatic monitoring of railway operation: Track status automatic monitoring system monitoring personnel take turns to be on duty at the system monitoring post 24 hours a day, monitor the data of the track status automatic monitoring system manually and complete notification, warning, analysis and recording of abnormal data.

2. The method for overhead jacking of a D-beam according to claim 1, characterized in that: The overhead system includes prefabricated railway tracks and D-shaped construction beams; the prefabricated railway tracks include rails, sleepers and wheel guard rails. The sleeper spacing is set as required, and a new type of bridge sleeper is used to meet the requirement of large-scale mechanical tamping operations without removing the wheel guard rails. The rail spacing adopts the standard gauge of 1435mm.

3. The method for overhead jacking of a D-beam according to claim 1, characterized in that: The D-beam overhead system includes segmented D-beams at both ends, an overhead crossbeam in the middle, a monitoring system and a hydraulic lifting device. The overhead crossbeam and the segmented D-beams at both ends are in a vertical relationship. The rails and wheel guard rails are installed perpendicular to the crossbeams. The sleepers are arranged alternately in parallel with the crossbeams and are connected to the rails through fasteners and bolts. Clamp plate positioning holes are provided on the upper part of the overhead crossbeams, and fasteners are provided on both sides of the rails to prevent the rails from sliding laterally. The clamp plate positioning holes are connected to the orifice plate positioning supports by bolts. The clamp plate positioning supports in the rail fasteners are directly connected to the side ribs of the crossbeams, and the lateral adjustment amount is 50 mm. The adjustable clamp plate can be fine-tuned along the direction of the rails, and the maximum lateral adjustment amount is 32 mm. The adjustable clamp plate must be fastened to the rails when installed.

4. The method for overhead jacking of a D-beam according to claim 3, characterized in that: The segmented D-beam is composed of multiple D-beam sections, and the sizes of the D-beam include D12, D16, D20, and D24. The D-beam sections are connected as a whole by fixed plates, and the overall length and track length meet the requirements of the overhead system; the segmented D-beam is connected to the overhead beam by connecting plates and corbels.

5. The method for overhead jacking of a D-beam according to claim 3, characterized in that: The hydraulic lifting equipment is located at both ends of the longitudinal beam and is fixedly connected to the longitudinal beam; two hydraulic lifting equipment are placed on both sides of each longitudinal beam to raise and lower the overhead system.

6. The method for overhead jacking of a D-beam according to claim 1, characterized in that: The mobile trolley includes a transverse moving trolley and a longitudinal moving trolley, which are used for the transverse and longitudinal movement of the overhead system; the transverse moving trolley is composed of a platform and four wheels, the wheels are located at the four corners of the trolley, and a steel structure is adopted. The lateral spacing between the wheels is the same as the track gauge; the longitudinal special moving trolley also includes two hydraulic lifting equipment arranged longitudinally on both sides of each wheel, and combined with specific working conditions, the spatial position adjustment of the overhead system is realized.

7. The method for overhead jacking of a D-beam according to claim 6, characterized in that: The transverse guide rail system consists of two parallel steel rails, and the spatial positions of both ends of the rails can be freely adjusted; two transverse moving trolleys are placed on each set of rails, and the D-beam is placed on the transverse moving trolley for transverse translation.

8. The method for overhead jacking of a D-beam according to claim 1, characterized in that: The monitoring system includes two types of monitoring devices, AB, an indoor system host, a data acquisition and communication extension, a connection adapter box and cables, which are used to calculate the track signal to determine whether the geometric dimensions of the track line exceed the allowable deviation management standard, and realize the real-time display of monitoring data and timely alarm of over-limit status.

9. The method for overhead jacking of a D-beam according to claim 8, characterized in that: Type A monitoring device is installed between two rails to detect the gauge and horizontal height difference between the reference rail and the other rail. Type B monitoring device is installed between the reference rail and the crossbeam of the overhead beam to detect the horizontal displacement and height difference of the reference rail relative to the crossbeam. The QR code of the overhead system sleepers is managed in an information manner and uploaded to the indoor host computer. According to the QR code of the sleepers, the material model, specification, pouring time, curing time, tensioning and grouting time of the overhead system as well as the self-inspection, mutual inspection and special inspection of the process can be obtained.

10. The method for overhead jacking of a D-beam according to claim 8, characterized in that: The data acquisition communication extension communicates with the indoor host via the network. The edge end is configured accordingly by the data acquisition communication extension, and the management end is the indoor computer. The system communication adopts transparent communication equipment, supports 4G full network access, industrial-grade design, has the characteristics of high efficiency and low latency, and supports network transparent transmission and protocol transparent transmission. The SIM card is configured to realize network communication. System users apply for two SIM cards and insert them into the designated position of the communication equipment to provide cost support for the system network data communication data traffic.

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