Railway turnout zone multi-span beam integral translation beam changing system and method

Abstract

The invention discloses a railway turnout zone multi-span beam integral translation beam changing system and method, and belongs to the technical field of railway bridges. The beam replacing system comprises a first upper sliding beam and a moving-out slide way which are arranged corresponding to an existing beam, a second upper sliding beam and a moving-in slide way which are arranged corresponding to a newly-built turnout beam, a plurality of first jacking mechanisms are arranged between the first upper sliding beam and the moving-out slide way, and the first upper sliding beams are connected with a traction mechanism; a plurality of second jacking mechanisms are arranged between the second upper sliding beams and the moving-in slide way, the second upper sliding beams are connected with the pushing mechanisms, and the computer control module controls the mechanisms to enable all existing beams to be moved out and all newly-built turnout beams to be moved in at the same time; and detection sensors for monitoring positions and stress in real time are arranged on the second jacking mechanism and the pushing mechanism, so that the computer control module can regulate and control the working states of the corresponding mechanisms in real time, and the whole multi-span newly-built turnout beam is always kept to synchronously slide at the same elevation and in the horizontal direction in the beam replacement process.

Description

Technical Field

[0001] The present invention belongs to the technical field of railway bridges, and particularly relates to a system and method for integral translation and beam replacement of multi-span beams in a railway turnout area. Background Art

[0002] The beam jacking construction technology is divided into longitudinal jacking and lateral jacking. Longitudinal jacking has been successively applied to the construction of various bridge types such as continuous bridges, arch bridges, and suspension bridges. Lateral jacking means placing the precast beam on the side of the proposed bridge location and horizontally moving it along the slide rail through the jacking and dragging of the hydraulic system. This technology is fast and stable and is suitable for environments with many interference factors. In recent years, it has also been widely used in interchanges.

[0003] Most of the existing jacking cases are single-hole horizontal translation. Projects such as the transformation of the operating railway turnout area and the connection of a newly built railway to the operating railway usually involve the translation and beam replacement of multi-span beams, which have the characteristics of many synchronous jacking points, fast jacking speed, and high requirements for jacking accuracy. The construction technology is relatively difficult. For the translation and beam replacement in the railway turnout area, the existing beam jacking construction technology has the following difficulties: (1) The structure and weight of the railway turnout beam are relatively large, and damage is likely to occur during the lifting, lowering, and translation processes. High requirements are imposed on the multi-point synchronous jacking accuracy of each jack. It is difficult for the existing beam jacking construction technology to ensure the synchronous jacking accuracy of each jack. (2) For the synchronous integral jacking and translation of multi-span beams, there is a risk of beam end jamming during translation, and high requirements are imposed on the translation accuracy, which is difficult to ensure by the existing beam jacking construction technology. (3) High requirements are imposed on the placement and lowering of the railway turnout beam in place. It is difficult for the existing beam jacking construction technology to ensure the accuracy of placement and lowering in place. (4) For the translation and beam replacement of multi-span beams in the operating railway turnout area, the translation and beam replacement need to be completed within the skylight. The existing beam jacking construction technology has a long jacking time and it is difficult to ensure the completion of beam replacement within the skylight. Summary of the Invention

[0004] In view of one or more of the above defects or improvement requirements of the prior art, the present invention provides a system and method for integral translation and beam replacement of multi-span beams in a railway turnout area, which can simultaneously remove all existing beams and move all newly built turnout beams in, so as to shorten the integral beam replacement time of multi-span beams and control the working states of each jack to achieve a high-precision control effect.

[0005] To achieve the above object, the present invention provides an integral translation beam replacement system for multi-span beams in a railway turnout area, which is used to accurately control the integral transverse translation of multi-span newly-built turnout beams to replace multi-span existing beams. It includes first upper sliding beams arranged in parallel at intervals under the bottom of each span of the existing beam and removal slideways corresponding to the first upper sliding beams, second upper sliding beams arranged in parallel at intervals under the bottom of the newly-built turnout beam and insertion slideways corresponding to the second upper sliding beams; characterized in that it further includes a first jacking mechanism, a traction mechanism, a second jacking mechanism, a pushing mechanism, a detection sensor and a computer control module; A plurality of first jacking mechanisms are installed at the bottom of each first upper sliding beam, and these first jacking mechanisms are all placed on the removal slideways and are used to jack up the existing beam; the traction mechanism is arranged on one side of the existing beam storage area and can be connected to the first upper sliding beam, and is used to traction the existing beam and the first jacking mechanism to slide along the removal slideway; A plurality of second jacking mechanisms are installed at the bottom of each second upper sliding beam and are used to jack up the newly-built turnout beam; the pushing mechanism is arranged on one side of the newly-built turnout beam assembly area and can be connected to the second upper sliding beam, and is used to push the newly-built turnout beam and the second jacking mechanism to slide along the insertion slideway; The detection sensors are arranged on the second jacking mechanism and the pushing mechanism and are used to monitor the position and force of the corresponding mechanisms in real time; The computer control module is connected to the power equipment of each mechanism and is used to control each mechanism to simultaneously complete the integral jacking up of multi-span existing beams, moving them out to the existing beam storage area and the integral jacking up of multi-span newly-built turnout beams, moving them in to the designed pier position; and The computer control module receives and processes the position signals and force signals output by the detection sensors to real-time regulate the working states of all the second jacking mechanisms and the pushing mechanisms, so that the multi-span newly-built turnout beams always maintain the same elevation and synchronous sliding in the horizontal direction during the beam replacement process.

[0006] As a further improvement of the present invention, the first jacking mechanism, the traction mechanism, the second jacking mechanism and the pushing mechanism are all hydraulic jacks, and their power equipment is a hydraulic pump station; and the second jacking mechanism is a three-dimensional jack, and can also adjust the horizontal positions in the transverse and longitudinal directions of the newly-built turnout beam.

[0007] As a further improvement of the present invention, it further includes a wireless static level connected to the computer control module, which is arranged on the top of the newly-built turnout beam and is used to collect the elevation data of the newly-built turnout beam in real time and provide it to the computer control module for comparison with the theoretical calculation data.

[0008] As a further improvement of the present invention, polytetrafluoroethylene plates are installed at the bottoms of the first jacking mechanism and the second jacking mechanism as sliders to reduce the friction between the first jacking mechanism and the removal slideway and between the second jacking mechanism and the insertion slideway.

[0009] As a further improvement of the present invention, reaction force slot plates are provided on both sides of the moving-in slideway and the moving-out slideway, respectively providing guidance for the traction mechanism and the pushing mechanism.

[0010] As a further improvement of the present invention, a copper bar is provided outside the second jacking mechanism, and the distance between the copper bar and the reaction force slot plate is not greater than 10 mm to limit the longitudinal displacement deviation of each newly built turnout beam during the pushing process.

[0011] As a further improvement of the present invention, part of the moving-in slideway and the moving-out slideway are collinear.

[0012] Another aspect of the present invention provides a method for overall translation and beam replacement of multi-span beams in a railway turnout area, which is realized by using the above-mentioned overall translation and beam replacement system for multi-span beams in a railway turnout area, and includes the following processes: (1) Preparation process S101: Set up a moving-out slideway on one side of the turnout area to the existing beam storage area, and set up a traction mechanism on the side of the existing beam storage area; set up a moving-in slideway on the other side of the turnout area to the newly built turnout beam assembly area, and set up a pushing mechanism on the side of the newly built turnout beam assembly area; install detection sensors on the second jacking mechanism and the pushing mechanism; S102: Install a first upper slide beam corresponding to the moving-out slideway at the bottom of each span of the existing beam, and install and connect a plurality of first jacking mechanisms below each first upper slide beam; remove the connections between each span of the existing beams and between each existing beam and the existing pier bearing; S103: Assemble and butt multiple spans of newly built turnout beams into a whole in the newly built turnout beam assembly area, install a second upper slide beam corresponding to the moving-in slideway at the bottom of the newly built turnout beam, and install and connect a plurality of second jacking mechanisms below each second upper slide beam; S104: Connect the power equipment of each jack and the detection sensors to the computer control module; (2) Beam replacement process S201: The computer control module controls all the first jacking mechanisms to lift all the existing beams off the existing piers, and controls all the second jacking mechanisms to lift the assembled newly built turnout beams off the support brackets; S202: Connect the traction mechanism to each first upper slide beam, and connect the pushing mechanism to each second upper slide beam; S203: The computer control module controls all traction mechanisms to simultaneously and synchronously traction all existing beams along the removal slideway to the existing beam storage area, and controls all jacking mechanisms to simultaneously and synchronously jack all newly built turnout beams along the insertion slideway to the designed pier positions; meanwhile, the computer control module adjusts the pressure of each second jacking mechanism in real time according to the position signals and force signals output by the detection sensors to keep all newly built turnout beams at the same elevation all the time, and adjusts the pressure of each jacking mechanism in real time to make all newly built turnout beams slide synchronously in the horizontal direction.

[0013] As a further improvement of the present invention, the second jacking mechanism is a three-dimensional jack; The beam replacement process further includes S204: After the newly built turnout beams reach the designed pier positions, the computer control module controls each second jacking mechanism to correct the lateral and longitudinal positions of the newly built turnout beams to align each newly built turnout beam with the corresponding designed pier bearing, and then the computer control module controls all second jacking mechanisms to descend as a whole to lower all newly built turnout beams onto the corresponding designed pier bearings.

[0014] As a further improvement of the present invention, the preparation process further includes S105: A wireless static level is arranged on the top of the newly built turnout beam and is connected to the computer control module; and During the whole beam replacement process, the wireless static level real-time collects the elevation data of the newly built beam, and the computer control module compares the elevation data with the theoretical calculation data to judge whether it exceeds the threshold value. If it exceeds, the construction plan is adjusted in time.

[0015] The above improved technical features can be combined with each other as long as they do not conflict with each other.

[0016] Generally speaking, compared with the prior art, the beneficial effects of the above technical solutions conceived by the present invention include: (1) The railway turnout area multi-span beam integral translation beam replacement system of the present invention comprises a first upper sliding beam and a removal slideway corresponding to each span of the existing beam, and a second upper sliding beam and a moving-in slideway corresponding to each span of the newly built turnout beam. A plurality of first jacking mechanisms are arranged between each pair of first upper sliding beams and the moving-out slideways to connect each first upper sliding beam with a traction mechanism; a plurality of second jacking mechanisms are arranged between each pair of second upper sliding beams and the moving-in slideways to connect each second upper sliding beam with a pushing mechanism. The computer control module controls each jack so that the jacking and removal of all existing beams and the jacking and removal of all newly built turnout beams are carried out simultaneously. Further, detection sensors capable of real-time monitoring of position and force are arranged on the second jacking mechanisms and the pushing mechanisms so that the computer control module can adjust the working status of all the second jacking mechanisms and the pushing mechanisms in real time, so that the multi-span newly built turnout beams as a whole always maintain synchronous sliding at the same elevation and in the horizontal direction during the beam replacement process. The railway switch area multi-span beam overall translation and replacement system of the present invention can realize the simultaneous movement of multi-span existing beams out and multi-span newly built switch beams in, and the overall same elevation and synchronous translation of multi-span newly built switch beams during the translation and replacement process. It has the characteristics of high efficiency, accuracy and reliability, and effectively solves the difficulties of short time and high precision requirements for translation and replacement of multi-span beams in the switch area.

[0017] (2) The method for overall translation and replacement of multi-span beams in the railway turnout area of ​​the present invention can realize the requirements of high precision of multi-point synchronous lifting and dropping of beams and multi-point synchronous jacking, high translation precision, high precision of beam placement, and short construction time when replacing beams in the operating railway turnout area. It is the first case of simultaneous replacement of multi-span railway turnout beams and has pioneering significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 2 is a schematic cross-sectional view of a system for integrally shifting and replacing beams of a multi-span beam in a railway turnout area according to an embodiment of the present invention; Figure 2 Schematic diagram of the plan layout of the multi-span beam integral translation beam replacement system in the railway turnout area according to the embodiment of the present invention; Figure 3 is a schematic cross-sectional view of a slideway exit / slideway entry in an embodiment of the present invention; Figure 4 It is a structural schematic diagram of the second lifting mechanism in an embodiment of the present invention.

[0020] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. Existing beam; 2. New turnout beam; 3. First upper sliding beam; 4. Second upper sliding beam; 5. Move out of the slideway; 6. Move into the slideway; 7. First jacking mechanism; 8. Traction mechanism; 9. Second jacking mechanism; 901. Copper bar; 10. Pushing mechanism; 11. Existing beam storage area; 12. New turnout beam assembly area; 13. Design pier position; 14. Existing piers; 15. New piers; 16. Distribution beam; 17. Channel steel; 18. Steel pipe column; 19. Abutment; 20. Pile foundation. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions 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 intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0026] Embodiment: Please refer to Figures 1 to 2 , Figure 1 , Figure 2 which are respectively the schematic diagrams of the multi-span beam integral translation beam replacement system before and after beam replacement. The multi-span beam integral translation beam replacement system in the preferred embodiment of the present invention is used to accurately control the overall transverse translation of the newly built turnout beam 2 to replace the multi-span existing beams 1 on the existing line. The existing beam 1 is the original railway bridge of the operating railway, and the newly built turnout beam 2 is a variable-width beam newly built to meet the turnout area transformation, with a large structure and weight.

[0027] In a specific preferred embodiment, as Figure 2 shown, the multi-span newly built turnout beam 2 is composed of a three-span continuous steel box girder and two simply supported steel box girders, and the multi-span existing beam 1 is composed of simply supported T-beams numbered ①, ②, ③, and ④.

[0028] The multi-span beam integral translation beam replacement system in the preferred embodiment of the present invention includes first upper sliding beams 3 arranged in parallel at intervals at the bottom of each span of the existing beam 1 and corresponding removal slideways 5, and second upper sliding beams 4 arranged in parallel at intervals at the bottom of each span of the newly built turnout beam 2 and corresponding insertion slideways 6.

[0029] Specifically, two parallel upper sliding beams and corresponding slideways are provided at the bottom of each span of the beam. For example, Figure 2 in, eight first upper sliding beams are provided at the bottom of the four-span existing beam 1, and a total of eight removal slideways HD1 to HD8 are correspondingly provided. Among them, HD1 and HD2 are used to remove the simply supported beam numbered ①, HD3 and HD4 are used to remove the simply supported beam numbered ②, HD5 and HD6 are used to remove the simply supported beam numbered ③, and HD7 and HD8 are used to remove the simply supported beam numbered ④; similarly, six second upper sliding beams are provided at the bottom of the three-span continuous steel box girder of the newly built turnout beam 2, and four second upper sliding beams are provided at the bottom of the other two simply supported steel box girders, and a total of ten insertion slideways 6 are correspondingly provided.

[0030] Preferably, some of the removal slideways 5 and the insertion slideways 6 are collinear. For example, Figure 2Among HD1, HD2, HD4, HD7, and HD8, the collinear removal chute 5 and the insertion chute 6 can share the chute located in the pier area, reducing the engineering quantity of constructing the chute.

[0031] As Figure 3 shown, a support assembly is provided below the removal chute 5 and the insertion chute 6, which are, from top to bottom, the distribution beam 16, the steel pipe column 18, the bearing platform 19, and the pile foundation 20. The pile foundation 20 supports the bearing platform 19, the bearing platform 19 supports the steel pipe column 18, adjacent steel pipe columns 18 are connected and reinforced by channel steel 17, the steel pipe column 18 supports the distribution beam 16, and the distribution beam 16 supports the removal chute 5 or the insertion chute 6.

[0032] Furthermore, the beam replacement system further includes a first jacking mechanism 7, a traction mechanism 8, a second jacking mechanism 9, a pushing mechanism 10, a detection sensor, and a computer control module.

[0033] Among them, a plurality of first jacking mechanisms 7 are installed at the bottom of each first upper sliding beam 3, and these first jacking mechanisms 7 are all placed on the removal chute to jack up the existing beam 1; the traction mechanism 8 is arranged on one side of the existing beam storage area 11 and can be connected to the first upper sliding beam 3 to traction the existing beam 1 and the first jacking mechanism 7 to slide along the removal chute 5; a plurality of second jacking mechanisms 9 are installed at the bottom of each second upper sliding beam 4 to jack up the newly built turnout beam 2; the pushing mechanism 10 is arranged on one side of the newly built turnout beam assembly area 12 and can be connected to the second upper sliding beam 4 to push the newly built turnout beam 2 and the second jacking mechanism 9 to slide along the insertion chute 6; the detection sensor is arranged on the second jacking mechanism 9 and the pushing mechanism 10 to monitor the position and force of the corresponding jack in real time; the computer control module is connected to the power equipment of each jack to control each jack to simultaneously complete the overall jacking up of the existing beam 1, moving it out to the existing beam storage area 11, and the overall jacking up of the newly built turnout beam 2, moving it into the designed pier position 13; and the computer control module receives and processes the position signal and force signal output by the detection sensor to real-time regulate the working state of all the second jacking mechanisms 9 and the pushing mechanism 10, so that all the newly built turnout beams 2 always maintain the same elevation and synchronous sliding in the horizontal direction during the beam replacement process.

[0034] The beam replacement process of this beam replacement system is as follows: All the first jacking mechanisms 7 jack up the existing beam 1 as a whole simultaneously. The first jacking mechanism 7 serves as a sliding slider, and the traction mechanism 8 moves each span of the existing beam 1 as a whole along the removal slideway 5 to the existing beam storage area 11. At the same time, all the second jacking mechanisms 9 jack up the newly built turnout beam 2 as a whole. The second jacking mechanism 9 serves as a sliding slider, and the pushing mechanism 10 pushes each span of the newly built turnout beam 2 as a whole to the designed pier position 13. The computer control module controls the power equipment of all mechanisms to simultaneously carry out the removal of all existing beams and the insertion of all newly built turnout beams, with a high degree of automation and short time consumption, effectively solving the difficulty of short time for translating and replacing beams within the operation railway's skylight period.

[0035] The following operations are also carried out simultaneously during the beam replacement process: The computer control module and the detection sensors monitor and adjust the working states of the second jacking mechanism 9 and the pushing mechanism 10 in real time. After detecting that any newly built turnout beam 2 is displaced, automatic deviation correction can be carried out, enabling the jacking speed and sliding distance of each jack to achieve a high-precision control effect. It can realize the overall same elevation and synchronous translation of multiple spans of the newly built turnout beam 2 during the translation beam replacement process, featuring high efficiency, accuracy, and reliability, effectively solving the difficulty of high precision requirements for translating and replacing multiple-span beams in the turnout area.

[0036] Exemplarily, the deviation correction process is as follows: According to the designed elevation of the newly built turnout beam 2 and the heights at various parts of the newly built turnout beam itself, the elevation reference values of all the second jacking mechanisms 9 are obtained. If the detection sensor monitors that the elevation position of a certain second jacking mechanism 9 is different from its reference value during the beam replacement process, the computer control module increases or decreases the acting force of this second jacking mechanism 9 according to the deviation value, so that its elevation position is adjusted to be consistent with the reference value, that is, ensuring that the multiple-span newly built turnout beam remains at the same elevation during the beam replacement process. At the same time, the detection sensor can also monitor the moving distance of the pushing mechanism 10 along each insertion slideway. If the moving distance monitored on a certain insertion slideway is different from that of other insertion slideways, the computer control module increases or decreases the pushing force of the pushing mechanism 10 on this insertion slideway according to the deviation value, so that the moving distance along this insertion slideway is adjusted to be the same as that of other insertion slideways, that is, ensuring that the multiple-span newly built turnout beam slides synchronously in the horizontal direction during the beam replacement process.

[0037] Preferably, the traction mechanism 8 is installed on the removal slideway 5 of the existing beam storage area 11. Each removal slideway 5 on one side of the existing beam storage area 11 is provided with a traction mechanism 8, and the traction mechanism 8 is arranged in one-to-one correspondence with the first upper sliding beam. The pushing mechanism 10 is installed on the insertion slideway 6 of the newly built turnout beam assembly area 12. Each insertion slideway 6 on one side of the newly built turnout beam assembly area 12 is provided with a pushing mechanism 10, and the pushing mechanism 10 is arranged in one-to-one correspondence with the second upper sliding beam.

[0038] Further preferably, polytetrafluoroethylene plates are installed at the bottom of the first jacking mechanism 7 and the second jacking mechanism 9 as sliding blocks to reduce the friction between the first jacking mechanism 7 and the removal slide 5 and between the second jacking mechanism 9 and the movement slide 6.

[0039] In a preferred embodiment, a stainless steel plate connected to the polytetrafluoroethylene plate is also provided on the removal slide 5 and the movement in slide 6, and a sliding contact surface is formed between the polytetrafluoroethylene plate and the stainless steel plate, which further reduces the friction between the first lifting mechanism 7 and the removal slide 5, and between the second lifting mechanism 9 and the movement in slide 6.

[0040] Preferably, reaction force slot plates are provided on both sides of the moving-in slide 6 and the moving-out slide 5 to provide guidance for the traction mechanism 8 and the pushing mechanism 10 respectively.

[0041] like Figure 4 As shown, a copper bar 901 is preferably provided on the outer side of the second lifting mechanism 9, and the distance between the copper bar and the reaction force slot plate is not greater than 10 mm, so as to limit the longitudinal bridge displacement deviation of each newly built turnout beam during the jacking process.

[0042] In the preferred embodiment, the first lifting mechanism 7, the traction mechanism 8, the second lifting mechanism 9, and the pushing mechanism 10 are all hydraulic jacks, and their power equipment is a hydraulic pump station. The computer control module calculates the design load at each position to control the cylinder pressure of each jack, and accurately adjusts the pressure of each jack according to the position signal and force signal detected by the detection sensor to keep the beam replacement process smooth.

[0043] Further preferably, the second jacking mechanism 9 is a three-dimensional jack, which can adjust the lateral and longitudinal horizontal positions of the newly built turnout beam. The horizontal position of the newly built turnout beam of each span can be accurately fine-tuned before the jacking of the newly built turnout beam and after the sliding is completed, so that the newly built turnout beams of each span are aligned with each other before jacking, and the newly built turnout beams of each span are aligned with the designed pier supports after the sliding is completed.

[0044] In the preferred embodiment, the designed bridge piers include newly built bridge piers 15 and part of the existing bridge piers 14. Since the structure and weight of the newly built turnout beam 2 are greater than the existing beam 1, it is necessary to set up newly built bridge piers 15 to provide sufficient support for the newly built turnout beam 2, while retaining the existing bridge piers 14 that can continue to be used to save construction costs. For example, the existing bridge piers 14 at both ends of the designed bridge pier position 13 can continue to be used, and the existing bridge piers 14 in the middle area can be removed after the beam replacement is completed. Preferably, the beam replacement system also includes a wireless static level connected to the computer control module, which is arranged on the top of the newly built turnout beam 2 and is used to collect elevation data of the newly built turnout beam 2 in real time and provide it to the computer control module for comparison with theoretical calculation data.

[0045] Preferably, the detection sensors can also be arranged on the first jacking mechanism 7 and the traction mechanism 8, so that the computer control module can accurately regulate the pressures of all the first jacking mechanisms 7 and the traction mechanism 8 according to the position signals and force signals output by the detection sensors, and move the existing beam 1 to the designated position in the existing beam storage area 11. For example, Figure 2 the existing beams 1 in each span can be aligned or staggered at the designated positions in the existing beam storage area 11.

[0046] In actual use, a preferred embodiment provides a method for overall translation and beam replacement of multi-span beams in a railway turnout area, which is realized by using the above-mentioned overall translation and beam replacement system for multi-span beams in a railway turnout area, and includes the following processes: (1) Preparation process S101: Set up an out-sliding track on one side of the turnout area to the existing beam storage area, and set up a traction mechanism on the side of the existing beam storage area; set up an in-sliding track on the other side of the turnout area to the new turnout beam assembly area, and set up a jacking mechanism on the side of the new turnout beam assembly area; install detection sensors on the second jacking mechanism and the jacking mechanism; S102: Install a first upper sliding beam corresponding to the out-sliding track at the bottom of each span of the existing beam, and install and connect a plurality of first jacking mechanisms below each first upper sliding beam; remove the connections between each span of the existing beams and between each existing beam and the existing pier bearing; S103: Assemble and butt a plurality of new turnout beams into a whole in the new turnout beam assembly area, install a second upper sliding beam corresponding to the in-sliding track at the bottom of the new turnout beam, and install and connect a plurality of second jacking mechanisms below each second upper sliding beam; S104: Connect the power equipment of each jack and the detection sensor to the computer control module; (2) Beam replacement process S201: The computer control module controls all the first jacking mechanisms to jack up all the existing beams away from the existing piers, and controls all the second jacking mechanisms to jack up the assembled new turnout beams away from the support brackets; S202: Connect the traction mechanism to each first upper sliding beam, and connect the jacking mechanism to each second upper sliding beam; S203: The computer control module controls all the traction mechanisms to simultaneously and synchronously pull all the existing beams along the out-sliding track to the existing beam storage area, and controls all the jacking mechanisms to simultaneously and synchronously push all the new turnout beams along the in-sliding track to the designed pier position; meanwhile, the computer control module adjusts the pressure of each second jacking mechanism in real time according to the position signals and force signals output by the detection sensors so that all the new turnout beams always maintain the same elevation, and adjusts the pressure of each jacking mechanism in real time so that all the new turnout beams slide synchronously in the horizontal direction.

[0047] Preferably, the second jacking mechanism used in the present method is a three-dimensional jack, and the beam replacement process also includes S204: after the newly built turnout beam reaches the designed pier position, the computer control module controls each second jacking mechanism to correct the lateral and longitudinal positions of the newly built turnout beam, so that each newly built turnout beam is aligned with each designed pier support, and then the computer control module controls all the second jacking mechanisms to fall as a whole, so that all the newly built turnout beams fall onto the corresponding designed pier supports.

[0048] Further preferably, the preparation process also includes S105: a wireless static level connected to the computer control module is arranged on the top of the newly built turnout beam; and during the entire beam replacement process, the wireless static level collects the elevation data of the newly built beam in real time, and the computer control module compares the elevation data with the theoretical calculation data to determine whether it exceeds the threshold. If so, the construction plan is adjusted in time.

[0049] The method for overall translation and replacement of multi-span beams in a railway switch area of ​​the present invention can achieve the requirements of high precision in multi-point synchronous lifting and dropping of beams and multi-point synchronous pushing, high translation precision, high precision in the position of beam dropping, and short construction time when replacing beams in a railway switch area in operation. It is the first case of simultaneous replacement of switch beams in multi-span railway bridges and is of pioneering significance.

[0050] It will be easily understood by those skilled in the art that 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 system for replacing multi-span beams in a railway turnout area, used for accurately controlling the overall horizontal displacement of multi-span newly built turnout beams to replace multi-span existing beams, comprising a first upper sliding beam arranged in parallel and spaced relation at the bottom of each span of the existing beams and a moving-out slideway corresponding to the first upper sliding beam, a second upper sliding beam arranged in parallel and spaced relation at the bottom of the newly built turnout beam and a moving-in slideway corresponding to the second upper sliding beam; characterized in that: It also includes a first lifting mechanism, a traction mechanism, a second lifting mechanism, a pushing mechanism, a detection sensor and a computer control module; A plurality of first lifting mechanisms are installed at the bottom of each first upper sliding beam, and these first lifting mechanisms are placed on the removal slideway for lifting the existing beam; a traction mechanism is arranged at one side of the existing beam storage area, and can be connected to the first upper sliding beam, and is used to pull the existing beam and the first lifting mechanism to slide along the removal slideway; A plurality of second lifting mechanisms are installed at the bottom of each second upper sliding beam for lifting the newly built turnout beam; the pushing mechanism is arranged at one side of the assembly area of ​​the newly built turnout beam and can be connected to the second upper sliding beam to push the newly built turnout beam and the second lifting mechanism to slide along the moving slideway; The detection sensors are arranged on the second lifting mechanism and the pushing mechanism, and are used to monitor the position and force of the corresponding mechanisms in real time; The computer control module is connected to the power equipment of each mechanism to control each mechanism to simultaneously complete the overall lifting of the existing beams with multiple spans, moving them out to the existing beam storage area, and the overall lifting of the newly built turnout beams with multiple spans, and moving them into the designed pier positions; and The computer control module receives and processes the position signal and force signal output by the detection sensor to adjust the working status of all the second lifting mechanisms and pushing mechanisms in real time, so that the newly built turnout beams with multiple spans can always maintain the same elevation and synchronous sliding in the horizontal direction during the beam replacement process.

2. The railway turnout area multi-span beam integral translation replacement system according to claim 1 is characterized in that: The first jacking mechanism, traction mechanism, second jacking mechanism and pushing mechanism are all hydraulic jacks, and their power equipment is a hydraulic pump station; and the second jacking mechanism is a three-dimensional jack, which can also adjust the horizontal position of the new turnout beam in the transverse and longitudinal directions.

3. The railway turnout area multi-span beam integral translation replacement system according to claim 1 is characterized in that: It also includes a wireless static level connected to the computer control module, which is arranged on the top of the newly built turnout beam and is used to collect the elevation data of the newly built turnout beam in real time and provide it to the computer control module for comparison with the theoretical calculation data.

4. The railway turnout area multi-span beam integral translation replacement system according to claim 1 is characterized in that: A polytetrafluoroethylene plate is installed at the bottom of the first lifting mechanism and the second lifting mechanism as a sliding block to reduce the friction between the first lifting mechanism and the moving-out slideway and between the second lifting mechanism and the moving-in slideway.

5. The railway turnout area multi-span beam integral translation replacement system according to claim 1 is characterized in that: Reaction force slot plates are arranged on both sides of the moving-in slideway and the moving-out slideway to provide guidance for the traction mechanism and the pushing mechanism respectively.

6. The railway turnout area multi-span beam integral translation replacement system according to claim 5 is characterized in that: A copper bar is arranged on the outer side of the second lifting mechanism, and the distance between the copper bar and the reaction force slot plate is not greater than 10 mm, so as to limit the longitudinal bridge displacement deviation of each newly built turnout beam during the jacking process.

7. The railway turnout area multi-span beam integral translation replacement system according to claims 1 to 6, characterized in that: Part of the moving-in slideway and the moving-out slideway are collinear.

8. A method for replacing multi-span beams in railway turnout area by overall translation, characterized in that: The method is implemented by using the railway turnout area multi-span beam integral translation beam replacement system described in any one of claims 1 to 7, and includes the following process: (1) Preparation process S101: a moving-out slideway is provided on one side of the turnout area to the existing beam storage area, and a traction mechanism is provided on the side of the existing beam storage area; an moving-in slideway is provided on the other side of the turnout area to the newly-built turnout beam assembly area, and a jacking mechanism is provided on the side of the newly-built turnout beam assembly area; detection sensors are installed on the second jacking mechanism and the jacking mechanism; S102: installing a first upper sliding beam corresponding to the removal slideway at the bottom of each span of the existing beam, and installing and connecting a plurality of first jacking mechanisms under each first upper sliding beam; removing the connection between the existing beams of each span and between each existing beam and the existing pier support; S103: assembling and connecting multiple spans of newly built turnout beams into a whole in the newly built turnout beam assembly area, installing a second upper sliding beam corresponding to the moving-in slideway at the bottom of the newly built turnout beam, and installing and connecting multiple second jacking mechanisms under each second upper sliding beam; S104: The power equipment and detection sensors of each jack are connected to the computer control module; (2) Beam replacement process S201: The computer control module controls all first lifting mechanisms to lift all existing beams away from the existing bridge piers, and controls all second lifting mechanisms to lift the assembled new turnout beams away from the supporting brackets; S202: connecting the traction mechanism to each first upper sliding beam, and connecting the pushing mechanism to each second upper sliding beam; S203: The computer control module controls all traction mechanisms to simultaneously and synchronously pull all existing beams along the outgoing slideway to the existing beam storage area, and controls all jacking mechanisms to simultaneously and synchronously jack all newly built turnout beams along the incoming slideway to the designed pier position; at the same time, the computer control module adjusts the pressure of each second jacking mechanism in real time according to the position signal and force signal output by the detection sensor so that all newly built turnout beams are always maintained at the same elevation, and adjusts the pressure of each jacking mechanism in real time so that all newly built turnout beams slide synchronously in the horizontal direction.

9. The method for integrally shifting and replacing multi-span beams in a railway turnout area according to claim 8 is characterized in that: The second lifting mechanism is a three-dimensional jack; The beam replacement process also includes S204: after the newly built turnout beam reaches the designed pier position, the computer control module controls each second jacking mechanism to correct the lateral and longitudinal positions of the newly built turnout beam, so that each newly built turnout beam is aligned with each designed pier support, and then the computer control module controls all the second jacking mechanisms to fall as a whole, so that all the newly built turnout beams fall onto the corresponding designed pier supports.

10. The method for integrally shifting and replacing multi-span beams in a railway turnout area according to claim 8, characterized in that: The preparation process further includes S105: arranging a wireless static level connected to a computer control module on the top of the newly built turnout beam; and During the entire beam replacement process, the wireless static level collects the elevation data of the newly built beam in real time. The computer control module compares the elevation data with the theoretical calculation data to determine whether it exceeds the threshold. If so, the construction plan is adjusted in time.

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