CN109267499B - Walking pushing method for curved bridge - Google Patents
Walking pushing method for curved bridge Download PDFInfo
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- CN109267499B CN109267499B CN201810374303.8A CN201810374303A CN109267499B CN 109267499 B CN109267499 B CN 109267499B CN 201810374303 A CN201810374303 A CN 201810374303A CN 109267499 B CN109267499 B CN 109267499B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
Abstract
A curve bridge walking pushing method is characterized in that multiple groups of pushing units are arranged on the inner side and the outer side of a bridge pier, are positioned on circular curves with equal distance on the two sides of a bridge center line, namely an outer side pushing trajectory line and an inner side pushing trajectory line, and are arranged in a centering mode along the tangential direction; an electro-hydraulic proportional speed regulating valve is arranged on an oil inlet path of a jack of the pushing unit, and pistons of the pushing jacks on two sides extend cylinders at a speed which is consistent with the proportion of pushing strokes on the two sides by regulating the oil inlet flow of the pushing jacks; in the pushing process, the photoelectric sensor detects the deviation condition of the main beam in real time, the deviation direction and the deviation degree of the main beam are determined through the detection of the photoelectric sensor on the detection lines with two different colors, and whether deviation correction is needed or not is judged; and correcting the deviation by the correcting jack when the deviation exceeds the standard. The method has the advantages of automatic walking according to a curve track, no need of stopping for adjustment, dynamic real-time deviation correction, high efficiency, simple structure of the used pushing device, small working space and low cost.
Description
Technical Field
The invention relates to the technical field of construction for civil engineering, in particular to a walking pushing method for a curve bridge.
Background
The continuous pushing technology is more widely applied to the translation construction of large-scale components. The walking incremental launching construction method is a novel and effective construction method for large-span structures such as bridge girder incremental launching construction. The existing walking type pushing equipment is generally applied to the working condition of straight line pushing, and the linear control is difficult for the working condition that the pushing track is curved, such as a curved bridge. The invention with application publication number CN 104790298A discloses a thrusting device and a thrusting method for continuous beam erection construction, wherein a beam is horizontally thrusted by a plurality of groups of thrusting devices arranged on the same arc line along the circumferential direction of a permanent buttress, and the thrusting directions of a horizontal top thruster and a sliding mechanism are adjusted by a deviation correcting mechanism, so that curve thrusting can be realized. However, the method has the following defects: when the curve is adjusted, the pushing operation must be interrupted, the pushing process is intermittent, and the efficiency is low.
The applicant has granted patent "walking pushing system pump station" with patent number ZL 201620588250.6, and discloses a walking pushing system pump station, which can realize the integration of subsystems such as a vertical lifting system, a longitudinal pushing system, a transverse dynamic deviation rectifying system and the like, and one set of system can meet the functions of vertical lifting, longitudinal horizontal pushing and transverse automatic deviation rectifying, but the equipment has certain limitations: although the same pump station can simultaneously control a plurality of pushing jacks, the loading speeds of a plurality of pushing jacks with the same model working simultaneously are basically the same, and the pushing jacks cannot simultaneously run at different loading speeds, so that the requirement of automatically pushing according to an arc curve cannot be met.
Disclosure of Invention
The invention aims to provide a method for pushing a curve bridge by a walking way, which can automatically walk according to a curve track, does not need to be stopped for adjustment, and can dynamically correct the deviation in real time.
The solution of the invention is such that:
a curve bridge walking pushing method is characterized in that: the method comprises the following steps:
(1) a calculation step: respectively calculating the total distance of outer side pushing and the total distance of inner side pushing according to the curvature and radius of the main beam pushing route, determining the speed ratio of the two side pushing according to the distance, and determining the oil inlet flow ratio of the two side pushing jacks according to the speed ratio;
(2) setting parameters of a control center: setting oil inlet flow ratio of two side pushing jacks, maximum allowable deviation distance of a main beam and related parameters of jacking, pushing and deviation correction in a control center, and starting equipment after setting is finished;
(3) arranging a pushing unit: a plurality of groups of pushing units are arranged on the inner side and the outer side of the bridge pier, and the pushing units are positioned on circular curves with equal distance on the two sides of the central line of the bridge, namely an outer side pushing trajectory line and an inner side pushing trajectory line, and are arranged in a centering way along the tangential direction;
(4) speed regulation of the pushing unit: an electro-hydraulic proportional speed regulating valve is arranged on an oil inlet path of a jack of the pushing unit, and pistons of the pushing jacks on two sides extend a cylinder at a speed which is consistent with the proportion of pushing strokes on the two sides by regulating the oil inlet flow of the pushing jacks;
(5) a pushing deviation judging step: a photoelectric sensor capable of identifying colors is arranged on a bridge center line on a bridge pier, track lines at the center line and the maximum allowable deviation distance of the main beams on two sides of the center line are marked on the bottom surface of the main beam 2 in different colors and are used as detection lines, the deviation direction and the deviation degree of the main beam are determined through the detection of the photoelectric sensor on the three detection lines in different colors, and whether deviation correction is needed or not is judged;
(6) deviation rectifying: in the pushing process, the photoelectric sensor detects the deviation condition of the main beam in real time, and when the photoelectric sensor cannot detect the color line marked on the central line of the main beam, the main beam is deviated; when the photoelectric sensor detects a right detection line, the main beam is indicated to be deflected to the left to reach a maximum allowable value; on the contrary, when the photoelectric sensor detects the left detection line, the main beam is shown to be deflected to the right to reach the maximum allowable value; at the moment, the deviation rectifying jack is started to rectify the deviation until the photoelectric sensor detects the center line of the bridge again and stops; and in the deviation rectifying process, a displacement sensor arranged on the deviation rectifying jack detects the deviation distance in real time and collects data so as to monitor the deviation rectifying process.
The more specific technical scheme is as follows: in the step of speed regulation of the pushing unit, after the pushing jack starts the extending cylinder, the main beam is pushed to slide forwards along the slideway, and the pushing is carried out according to the following regulation: and the outer pushing distance/the inner pushing distance is equal to the piston stroke of the outer pushing jack/the piston stroke of the inner pushing jack = the oil inlet flow rate of the outer pushing jack/the oil inlet flow rate of the inner pushing jack is equal to the cylinder extending speed of the outer pushing jack/the cylinder extending speed of the inner pushing jack, and the pushing member moves in a circular curve.
And further: in the deviation rectifying step (6), the displacement sensor on the correction jack adopts an ultrasonic displacement sensor to measure the distance change between the inner wall of the deviation rectifying reaction plate and the ultrasonic displacement sensor by taking the inner wall of the deviation rectifying reaction plate as a reflection point to judge the deviation rectifying distance so as to monitor the deviation rectifying process. The invention has the advantages of realizing the round curve pushing of the main beam of the curve bridge, automatically and dynamically rectifying deviation, needing no stop adjustment and having high working efficiency.
Drawings
Fig. 1 is a diagram of arrangement of pushing points in the walking type pushing method for curved bridges of the present invention.
Fig. 2 is a structure diagram of a pushing unit of the curve bridge walking type pushing method of the present invention.
Fig. 3 is a top view of fig. 2.
Fig. 4 is a schematic diagram of the hydraulic station of the present invention.
Fig. 5 is a side schematic view of the hydraulic station of the present invention.
The components of the drawings are detailed below:
1. the walking incremental launching unit 2, a main beam 3, an outer incremental launching track line 3a, an inner incremental launching track line 4, a right detection line 5, a bridge central line 6, a left detection line 7, a photoelectric sensor 8, a bridge pier 9, an oil tank 10, a 1# jacking oil inlet 10a, a 1# jacking oil return port 11, an electro-hydraulic proportional speed control valve 12, a 1# incremental launching oil inlet 12a, a 1# incremental launching oil return port 13, a 2# incremental launching oil inlet 13a, a 2# incremental launching oil return port 14, a 2# incremental launching oil inlet 14a, a 2# incremental launching oil return port 15, a 1# corrective oil inlet 15a, a 1# corrective oil return port 16, a 2# corrective oil inlet 16a, a 2# corrective oil return port 17, a displacement sensor interface 18, an incremental launching pressure retaining valve 19, a pressure sensor 20, an electromagnetic reversing valve 21, a valve body 22, a main valve 23, a hydraulic control system and a hydraulic control system, The device comprises a power interface 24, a jacking jack 25, a jacking displacement sensor 26, an auxiliary slideway 27, a movable block 28, a pushing displacement sensor 29, a pushing jack 30, a spherical hinge 31, a pushing reaction frame 32, a pushing jack piston 33, an MGE plate 34, a slide box 35, a deviation-rectifying reaction plate 36, a deviation-rectifying jack 37, a roller 38, a three-way joint 39, a slideway 40 and a deviation-rectifying displacement sensor.
Detailed Description
The invention comprises the following steps:
(1) a calculation step: respectively calculating the total pushing distance of the outer side and the total pushing distance of the inner side according to the curvature and the radius of the pushing route of the main beam, determining the speed ratio of pushing at the two sides according to the distance, and determining the oil inlet flow ratio of the pushing jacks at the two sides according to the speed ratio;
(2) setting parameters of a control center: setting oil inlet flow ratio of the jacking jacks at two sides, maximum allowable deviation distance of the main beam and related parameters of jacking, jacking and deviation correction in a control center, and starting equipment after setting is finished;
(3) arranging a pushing unit: a plurality of groups of pushing units are arranged on the inner side and the outer side of the bridge pier, and the pushing units are positioned on circular curves with equal distance on the two sides of the central line of the bridge, namely an outer side pushing trajectory line and an inner side pushing trajectory line, and are arranged in a centering way along the tangential direction;
(4) a speed regulation step of the pushing unit: an electro-hydraulic proportional speed regulating valve is arranged on an oil inlet path of a jack of the pushing unit, and pistons of the pushing jacks on two sides extend a cylinder at a speed which is consistent with the proportion of pushing strokes on the two sides by regulating the oil inlet flow of the pushing jacks;
(5) a pushing deviation judging step: a photoelectric sensor capable of identifying colors is arranged on a bridge pier at the center line of the bridge, track lines at the maximum allowable deviation distance of the center line and the main beams at two sides of the center line are marked on the bottom surface of the main beam 2 in different colors and are used as detection lines, the deviation direction and the deviation degree of the main beam 2 are determined through the detection of the photoelectric sensor on the three detection lines in different colors, and whether deviation correction is needed or not is judged;
(6) deviation rectifying: in the pushing process, the photoelectric sensor detects the deviation condition of the main beam in real time, and when the photoelectric sensor cannot detect the color line marked on the central line of the main beam, the main beam is deviated; when the photoelectric sensor detects a right detection line, the main beam is indicated to be deflected to the left to reach a maximum allowable value; on the contrary, when the photoelectric sensor detects the left detection line, the main beam is shown to be deflected to the right to reach the maximum allowable value; at the moment, the deviation rectifying jack is started to rectify the deviation until the photoelectric sensor detects the center line of the bridge again and stops; and in the deviation rectifying process, a displacement sensor arranged on the deviation rectifying jack detects deviation distance in real time and collects data so as to monitor the deviation rectifying process.
In the step of speed regulation of the pushing unit, after the pushing jack starts the extending cylinder, the main beam is pushed to slide forwards along the slideway, and the pushing is carried out according to the following regulation: and the outer pushing distance/the inner pushing distance is equal to the piston stroke of the outer pushing jack/the piston stroke of the inner pushing jack = the oil inlet flow rate of the outer pushing jack/the oil inlet flow rate of the inner pushing jack is equal to the cylinder extending speed of the outer pushing jack/the cylinder extending speed of the inner pushing jack, and the pushing member moves in a circular curve.
In the deviation rectifying step (6), the displacement sensor on the correction jack adopts an ultrasonic displacement sensor to measure the distance change between the inner wall of the deviation rectifying reaction plate and the ultrasonic displacement sensor by taking the inner wall of the deviation rectifying reaction plate as a reflection point to judge the deviation rectifying distance so as to monitor the deviation rectifying process. .
Specific examples are as follows:
as shown in fig. 1, in a walking dynamic pushing method for a main girder of a curved bridge, during construction, a plurality of groups of walking pushing units 1 are arranged on two sides of a bridge pier 8, and the walking pushing units 1 are required to be positioned on circular curves which are equidistant on two sides of a central line 5 of the bridge, namely an outer side pushing trajectory line 3 and an inner side pushing trajectory line 3a, and are arranged in a centering way along a tangential direction.
In order to realize that the main beam 2 travels along an arc track, an electro-hydraulic proportional speed regulating valve 11 is arranged on an oil way 12 for controlling oil inlet of a jacking jack 29 in a hydraulic pump station to regulate the oil inlet flow of the jacking jack 12, so that pistons of the jacking jacks at two sides stretch cylinders at a speed which is consistent with the proportion of jacking strokes at two sides.
In order to ensure the pushing precision, a photoelectric sensor 7 capable of identifying colors is arranged on the bridge pier 8 at the center line 5 of the bridge, track lines at the positions of the center line 5 and the maximum allowable deviation distance of the main beams at two sides of the center line 5 are marked on the bottom surface of the main beam 2 in different colors and are used as detection lines, the deviation direction and the deviation degree of the main beam 2 are determined through the detection of the photoelectric sensor 7 on the detection lines 4 and 6 in different colors, and whether deviation correction is needed or not is judged.
In this embodiment, the following specific technical embodiments are also included: the walking thruster comprises a jacking jack 24, a jacking jack 29, a deviation rectifying jack 36, a sliding box 34, a pump station, a sensor assembly and a control center.
As shown in fig. 2 and 3, one end of the slide box 34 is provided with a pushing reaction frame 31, the upper surface of the slide box 34 is provided with a slide way 39, and deviation rectifying reaction plates 35 are fixed on two sides of the slide way 39; the surface of the slideway 39 is matched with the MGE plate 33 to form a sliding structure; the jacking jack 24 is supported on the MGE plate 33, a counter bore is formed in the upper end face of the MGE plate 33, and the counter bore limits the jacking jack 24 so that the jacking jack 24 and the MGE plate 33 can move together. An auxiliary slideway 26 is arranged on the side wall of the jacking jack 24, the auxiliary slideway 26 is matched with a piston assembly of a jacking jack 29 to form a horizontal sliding structure, and the jacking jack 29 is fixed on the side wall of a jacking reaction frame 31; the symmetrical positions of the two sides of the jacking jack 24 are respectively connected with a deviation-rectifying jack 36, and the piston end of the deviation-rectifying jack 36 is over against the deviation-rectifying counter-force plates 35 on the two sides.
The piston assembly of the jacking jack 29 comprises a piston 32 and a movable block 27 fixedly connected with the piston 32, wherein a square flange is arranged at the front end of the movable block 27, is embedded into the auxiliary slideway 26 on the side wall of the jacking jack 24, is limited by the auxiliary slideway 26 and slides along the auxiliary slideway 26.
The piston end of the deviation correcting jack 36 is provided with a roller 37, so that the contact of the piston end and the deviation correcting reaction plate 35 forms horizontal rolling contact.
The two deviation-correcting jacks 36 are arranged on each side, the oil inlets of the two deviation-correcting jacks on the same side are communicated through a three-way joint 38 to share an oil inlet path, and the oil return inlets are also communicated through a three-way joint to share an oil return path.
The periphery of the slide way 39 is provided with edge strips for retaining the lubricating oil in the slide way 39.
The sensor assembly comprises a sensor 25 which is arranged on the jacking jack and used for measuring jacking displacement, a sensor 28 which is arranged on the jacking jack and used for measuring jacking displacement, a displacement sensor 40 which is arranged on the deviation-correcting jack and used for measuring transverse deviation, and pressure sensors which are respectively arranged on a jacking oil inlet path, a jacking oil inlet path and a deviation-correcting oil inlet path.
The displacement sensor installed on the deviation-correcting jack 36 for measuring the lateral deviation is an ultrasonic sensor, which uses the inner wall of the deviation-correcting reaction plate 35 as a reflection point, judges the deviation-correcting distance by measuring the change of the distance between the displacement sensor and the inner wall of the deviation-correcting reaction plate 35, and acquires data, and compares the data with the measurement result of the photoelectric sensor 7 to monitor the deviation-correcting process.
A walking type dynamic pushing method for a main beam of a curved bridge comprises the following steps:
1. and respectively calculating the total distance of the outer side pushing and the total distance of the inner side pushing according to the curvature and the radius of the pushing route of the main beam, determining the speed ratio of the two side pushing according to the distance, and determining the oil inlet flow ratio of the two side pushing jacks according to the speed ratio.
2. Setting relevant parameters in a master control center, setting the oil inlet flow ratio of the pushing jacks at the two sides, the maximum allowable deviation distance of the main beam and the relevant parameters of jacking, pushing and deviation correction, and starting the equipment after setting is finished;
3. lifting the main beam: the jacking jack 24 extends a cylinder to jack the main beam 2 away from the pier 8, and the main beam is automatically stopped when a set stroke is reached, and at the moment, the load of the main beam 2 is transferred to the jacking jack 24 from the pier 8;
4. pushing the main beam: the jacking jack 29 is automatically started and extends the cylinder to push the jacking jack 24, the deviation correcting jack 36 and the components together with the main beam 2 to slide forwards along the slideway. Under the action of the electro-hydraulic proportional speed regulating valve 11, the outer side thrusting distance/the inner side thrusting distance is equal to the outer side thrusting jack piston stroke/the inner side thrusting jack piston stroke = the outer side thrusting jack oil inlet flow rate/the inner side thrusting jack oil inlet flow rate is equal to the outer side thrusting jack cylinder extending speed/the inner side thrusting jack cylinder extending speed, so that circular and curvilinear motion of the component is realized.
5. Rectifying deviation: in the pushing process, the photoelectric sensor 7 detects the deviation condition of the main beam 2 in real time, and when the photoelectric sensor 7 cannot detect a color line marked on the central line 5 of the main beam, the main beam 2 is deviated; when the photoelectric sensor 7 detects the right detection line 4, the main beam 2 is indicated to be deflected to the left by a maximum allowable value; on the contrary, when the photoelectric sensor 7 detects the left detection line 6, it indicates that the main beam 2 has been deflected to the right by the maximum allowable value. At this time, the deviation rectifying jack 36 is started, the deviation rectifying counter-force plate 35 is applied with force through the roller 37, the main beam 2 is rectified by the counter-force, and the deviation rectifying jack is stopped until the photoelectric sensor 7 detects the bridge center line 5 again. Deviation correction process the displacement sensor 40 mounted on the deviation correction jack 36 detects the deviation distance in real time and collects data to monitor the deviation correction process.
6. And (3) beam falling: after the jacking reaches a set distance, the jacking jack 24 automatically retracts, the main beam 2 falls on the pier 8 again, and the load of the main beam is transferred to the pier 8 by the jacking jack 24;
7. and (3) return stroke: the jacking jack 29 automatically retracts the cylinder to drive the jacking jack 24, the deviation correcting jack 36 and the component to return to the initial position.
And repeating the steps of 3-7 to realize continuous pushing of the main beam of the same curved bridge.
Claims (2)
1. A walking jacking method for a curve bridge is characterized by comprising the following steps:
and (3) calculating: respectively calculating the total pushing distance of the outer side and the total pushing distance of the inner side according to the curvature and the radius of the pushing route of the main beam, determining the speed ratio of pushing at the two sides according to the distance, and determining the oil inlet flow ratio of the pushing jacks at the two sides according to the speed ratio;
setting parameters of a control center: setting oil inlet flow ratio of the jacking jacks at two sides, maximum allowable deviation distance of the main beam and related parameters of jacking, jacking and deviation correction in a control center, and starting equipment after setting is finished;
arranging a pushing unit: a plurality of groups of pushing units are arranged on the inner side and the outer side of the bridge pier, and the pushing units are positioned on circular curves with equal distance on the two sides of the center line of the bridge, namely an outer pushing trajectory line and an inner pushing trajectory line, and are arranged in a centering way along the tangential direction;
speed regulation of the pushing unit: an electro-hydraulic proportional speed regulating valve is arranged on an oil inlet path of a jack of the pushing unit, and pistons of the pushing jacks on two sides extend a cylinder at a speed which is consistent with the proportion of pushing strokes on the two sides by regulating the oil inlet flow of the pushing jacks;
a pushing deviation judging step: arranging a photoelectric sensor capable of identifying colors on a bridge pier at the center line of the bridge, marking track lines at the maximum allowable deviation distance of the main beams at the center line and two sides of the center line on the bottom surface of the main beam in three different colors respectively to serve as detection lines, determining the deviation direction and the deviation degree of the main beams through the detection of the photoelectric sensor on the detection lines in the three different colors, and judging whether deviation correction is needed or not;
deviation rectifying: in the pushing process, the photoelectric sensor detects the deviation condition of the main beam in real time, and when the photoelectric sensor cannot detect a color line marked on the central line of the main beam, the main beam is deviated; when the photoelectric sensor detects a right detection line, the main beam is indicated to be deflected to the left to reach a maximum allowable value; on the contrary, when the photoelectric sensor detects the left detection line, the main beam is indicated to be deviated to the right to reach the maximum allowable value; at the moment, the deviation rectifying jack is started to rectify the deviation until the photoelectric sensor detects the center line of the bridge again and stops; the displacement sensor arranged on the deviation rectifying jack detects deviation distance in real time and collects data in the deviation rectifying process so as to monitor the deviation rectifying process, the ultrasonic displacement sensor is adopted as the displacement sensor on the deviation rectifying jack, and the distance change between the inner wall of the deviation rectifying counter plate and the ultrasonic displacement sensor is measured by taking the inner wall of the deviation rectifying counter plate as a reflection point so as to judge the deviation rectifying distance so as to monitor the deviation rectifying process.
2. The curvilinear bridge walking jacking method according to claim 1, wherein: in the step of speed regulation of the pushing unit, after the pushing jack starts the extending cylinder, the main beam is pushed to slide forwards along the slideway, and the pushing is carried out according to the following regulation: and the outer side pushing distance/the inner side pushing distance is equal to the outer side pushing jack piston stroke/the inner side pushing jack piston stroke = the outer side pushing jack oil inlet flow rate/the inner side pushing jack oil inlet flow rate is equal to the outer side pushing jack cylinder extending speed/the inner side pushing jack cylinder extending speed, and the pushing member moves in a circular curve.
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| CN111501574B (en) * | 2020-05-11 | 2021-11-09 | 中交二公局第五工程有限公司 | Steel plate girder S plane linear guide-beam-free split parallel pushing construction method |
| CN111764300B (en) * | 2020-07-21 | 2022-03-25 | 安徽省交通建设股份有限公司 | Curved steel beam pushing system and construction method |
| CN113565019B (en) * | 2021-07-30 | 2022-06-07 | 中交路桥建设有限公司 | Incremental launching construction method for large-super-high small-radius circular curve steel box girder |
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| RU2005117048A (en) * | 2005-06-03 | 2006-12-10 | Открытое акционерное общество по проектированию строительства мостов "Институт Гипростроймост" (RU) | DEVICE FOR LONGITUDINAL SLIDING OF THE SPAN STRUCTURE OF THE BRIDGE |
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Address after: 511493 building 28, headquarters center, Tian'an energy saving science and Technology Park, Panyu District, Guangzhou City, Guangdong Province Applicant after: GUANGDONG CONSTRUCTION CO., LTD. OF CHINA RAILWAY NO.3 ENGINEERING GROUP Co.,Ltd. Applicant after: Liuzhou Qianqiao Technology Co.,Ltd. Applicant after: CHINA RAILWAY NO.3 ENGINEERING GROUP Co.,Ltd. Address before: 511493 building 28, headquarters center, Tian'an energy saving science and Technology Park, Panyu District, Guangzhou City, Guangdong Province Applicant before: GUANGDONG CONSTRUCTION CO., LTD. OF CHINA RAILWAY NO.3 ENGINEERING GROUP Co.,Ltd. Applicant before: LIUZHOU QIAN BRIDGE ENGINEERING MATERIALS Co.,Ltd. Applicant before: CHINA RAILWAY NO.3 ENGINEERING GROUP Co.,Ltd. |
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