What is a seamless line? According to the different treatment methods of internal temperature stress of rail, which categories can it be divided into?

In accordance with the requirements of the document "Beijing Railway Bureau's Standardized Management Law on Railway Broken Prevention (Trial)" (J.G.H. [2014] No.54), in order to further standardize the management of railway broken prevention, improve the management level of standardized work, ensure that the railway broken prevention work from 2065 438+04 to 20 15 is orderly and controllable, and realize the goal of railway broken prevention work, this section is specially combined with my section. First, in order to ensure the solid and effective development of the work of "cracking down on illegal publications", Duan specially set up a leading group for "cracking down on illegal publications". Team leader: section chief, deputy head of Party committee secretary: members of the department leadership team: section heads (directors) of line technology department, safety department, safety production dispatching command center, chief engineer and dispatcher, ministry of materials and equipment, vocational education department and other departments. The section chief and the party secretary are fully responsible for the anti-breaking work. The deputy section chief in charge of maintenance is responsible for organizing the implementation of the relevant regulations and requirements of the head office and the bureau on rail breaking prevention, clarifying the key points of rail breaking prevention, formulating the work objectives, work arrangements, measures, plans and assessment mechanisms of the unit, and organizing their implementation. According to the equipment status, annual overhaul and various construction conditions, make overall arrangements for anti-break related work. Other deputy team leaders shall do a good job in the implementation of anti-breakage according to their respective responsibilities. The line technical department takes the lead, and the safety department cooperates with the safety production dispatching command center, which is responsible for timely organizing anti-breaking inspection and hidden danger analysis, summarizing the maintenance experience and the occurrence and development law of rail damage, solving the problems existing in line maintenance and flaw detection, and timely investigating, analyzing and handling rail broken faults. The Line Technology Department takes the lead and ministry of materials and equipment cooperates, and is responsible for the replenishment of spare parts and materials in the workshop. The Vocational Education Department takes the lead, and the Line Technology Department cooperates with the safety department, and is responsible for the education and training of the relevant workshop's business knowledge of breaking prevention and cold patrol. 2. Make clear the working policy and target working policy of breaking prevention: focus on bus safety, firmly establish the idea of putting prevention first, source control, hierarchical management, strengthening flaw detection, breaking prevention for all staff and multi-level inspection, strengthen professional technical management based on equipment standardization and operation standardization, and establish and improve the safety management system of breaking prevention, so that the breaking prevention work is always under control. Work objective: to achieve two elimination, two reduction and one compression, that is, to eliminate the track breaking due to missed inspection, to eliminate the track breaking due to equipment failure and disrepair, to reduce the misjudgment of inspection, to reduce the number of track breaking pieces and to reduce the delay of track breaking failure. Critical period of breakthrough: 20 1 411010/0 to 201may 15. Clarify the key points of breaking prevention-1. The equipment boundary is within the jurisdiction of Baodi Workshop: Beijing-Harbin-Tianjin-Hebei Consortium and Fengrun Factory. Qin Jin Jilian and Taiyuan Bureau Chawu Works Section Junction Tianyi Workshop Jurisdiction: Tianjin Intercity Shanglian and Beijing High-speed Railway Works Section Junction Yangliuqing Workshop Jurisdiction: Tianjin West EMU Line A and Beijing High-speed Railway Works Section Junction Nanyi Workshop Jurisdiction: Nancang Intercity Beijing-Shanghai Joint and Beijing High-speed Railway Works Section Junction Hangou Workshop Jurisdiction: Beijing-Shanghai, Beijing-Shanghai Third Line and Fengtai Works Section Jurisdiction: Beijing-Shanghai Line and Jinan Bureau Junction, Within the jurisdiction of the workshop at the junction of Shide Line and Hengshui Works Section: within the jurisdiction of Tanggu Workshop at the junction of Bajin Line and Baoding Works Section: within the jurisdiction of the workshop at the junction of Jinshan Line and Qinhuangdao Works Section, the junction of workshop and work area should also be listed as a key section for error prevention. In particular, the workshop and the working section should cooperate well in emergency treatment, and stand out on their own initiative to reduce fault delay. 2. North Ring Train Line of Beijing-Tianjin-Hebei Express Line: It involves our section starting from the starting station upstream of Nancang Station, passing through the Beijing-Shanghai upstream outlet section, passing through the local loop line, and then entering the pipeline section upstream of Nancang Station from Jinshan to arrive at the station. North Ring Road train stops: Nancang Station, TEDA Station and Zhang Gui Zhuang Station (technical parking). Train route in South Ring Road: It involves our section starting from Nancang Station, passing through the pipeline boundary of Beijing-Shanghai uplink, passing through the local loop line, and then going up from Shide Station, Dezhou Station (corner), Beijing-Shanghai uplink and Tianjin West Railway Station to reach Nancang Station. South ring train stops: Changzhuang, Wuqiao, Dongguang, Botou, Cangzhou, Qingxian, Tangguantun, Jinghai, Yangliuqing and Nancang stations. The workshop involved should strengthen the inspection of the express route, master the train time, and conduct an inspection before the express arrives when necessary. 3. In the key sections of each line (1), the construction section of disturbed ballasted foundation focuses on the relevant line workshops along Beijing-Shanghai, Jinshan, Beihuan Road and the second inbound line involved in the second half of the year's overhaul and centralized emergency repair. (2) Extra-long overhaul section of the extended service section: involving Dezhou, Wuqiao, Dongguang, Cangzhou, Qingxian, Jinghai, Yangliuqing, Tianxi, Nanyi, Hangou, Tianer, Junliangcheng and Tanggu. ⑶ Severe eccentric wear, fish scales and lumps: Jinshan uplink 134+373- 134+628, Jinshan downlink138+958-139+164: serious fish scales. (4) Non-automatic blocking section and tuning area (four display blind areas) Non-automatic blocking section: Chen branch line, Chengdu-Hebei line, Tianjin-Hebei ascending relief line, Jinan-Shanxi tie line, Beijin tie line, Daqin-Tianjin tie line, Jingha-Tianjin tie line and Beitang-Xingang tie line. Tuning area (four display blind areas): each line has 434 segments. 5] In the workshop pipeline of Cangzhou Line in the head rail section, Beijing-Shanghai downlink is 256+828-257+665. In the leisure workshop, Beijing and Shanghai go down 218+750-219+150, Beijing and Shanghai go down 220+800-22 1+500, and Beijing and Shanghai go up 234+730-235+330. 2. Key equipment types Each workshop shall establish and improve the ledger of key parts for fracture prevention. Focus on inspection of small radius curve section, non-self-closing section, bridge and tunnel ends100m, crossing, long ramp, transition section between wooden sleeper and concrete sleeper, jointless turnout and 25m before and after, buffer zone, nonstandard jointless track, subgrade subsidence section, top bridge section, subgrade grouting (rubber) section, subgrade soft section, speed-up turnout position, large and medium-sized repair construction and crane operation. High-temperature locked section, locked rail temperature unknown, inaccurate, uneven section, serious uneven displacement section of fixed area or seamless turnout, large rail gap section, fatigue rail, reused rail, off-edge rail section, serious ballast shortage and serious poor rail surface. For the sections with hidden dangers of circuit breaking, each workshop should list the key sections and parts of circuit breaking according to the division of labor in the work area, implement dynamic management, implement the sales number system, and organize the elimination in time. The following equipment types are mainly introduced here: 1. SC325 turnout long center rail and wing rail, especially at the tip of 330-550mm long center rail and variable cross section of wing rail. It involves the station between Liu Du and Changzhuang 14 on the Beijing-Shanghai line. Switch rail and movable rail of other turnouts. 2. The switch point rail and basic rail of the railway tie line are damaged, and the sliding bed plate is welded and broken. Involved in Hangou, Yangliuqing, Tanggu, Cangzhou and Dezhou line workshops. 3. There are rail damage, buried rail, hidden rail damage at crossing and rail welding repair. 4. Focus on inspection of frozen joints, bonded thermal insulation joints and irregular joints, especially Schmidt bonded thermal insulation plywood workshop, involving Hangou, Chagu Port, Yangliuqing and Nanyi Workshop. 5. The sections with weak line foundation, with emphasis on the sections with severe ballast bed hardening, frost boiling, suspension and flooding in flood season. 6. Main welding repair sites. Each line workshop must conduct a comprehensive and detailed investigation again. Once found, it must be reported to the line technology department immediately and arranged for handling. 7. Large rail gap. Each workshop should pay close attention to the change of rail gap in real time, and eliminate the large rail gap of 18mm and above in time. Fourth, strengthen flaw detection 1. Grasp the key points and ensure the inspection period. First, the two inspection workshops should arrange their work reasonably and do their best to ensure the inspection period from the main line and the bus line to the starting line. For lines that can't complete the weld flaw detection according to the cycle, the weld flaw detection in the curve should be given priority. At the same time, the section detected by the flaw detection vehicle can replace the parent metal flaw detection, and the flaw detection workshop can deploy the flaw detection force to strengthen the flaw detection inspection of welds and weak equipment. SC325。 Strengthen the flaw detection and manual inspection of weak equipment. According to the requirements of documents 20 12-7 15 and 20 12-723, the inspection location, method and period shall be strictly implemented. The second is the flaw detection of new welds. The flaw detection workshop is required to carry out flaw detection within 48 hours, and it can not exceed 7 days under special difficulties. Third, the rail inspection at the crossing. On the premise of meeting the normal inspection cycle, the inspection workshop should arrange to strengthen the inspection of the rail at the crossing. Fourth, the curve side wear, fish scale lines, and flaw detection in serious areas of falling blocks. The flaw detection workshop should actively study the flaw detection method, adjust the probe position and flaw detection sensitivity according to the rail condition, control the traveling speed not to exceed 1.5km/h, follow the cadres in the flaw detection workshop in key sections, and strengthen manual inspection. 3. Strengthen the playback analysis of flaw detection data. The data analysis of the day must be completed within 24 hours; Second, the flaw detection workshop should be re-examined according to the degree of damage. If serious injuries are found, such as eye fissure and obvious nuclear injury, they must be re-examined at the scene within 24 hours; Third, the data analysis team should not only analyze the damage, but also focus on the walking speed, flaw detection sensitivity and task completion, and form weekly and monthly analysis reports and report them to the workshop. Fourthly, data exchange analysis or dedicated channel analysis can be used to minimize the missed detection caused by human factors. V. Strengthening equipment inspection and transformation 1. Comprehensively strengthen the stability of jointless track. First of all, before entering the break-proof period, tighten the fasteners and connecting bolts that damage the foundation section of the ballast bed and the section where the fastener torque is not up to standard. The focus is on the buffer zone of jointless track, 50 meters before and after turnout, etc. , strengthen anti-climbing locking, re-tighten fishtail bolts and fastener bolts to supplement the failure and deficiency of fasteners. In particular, it is necessary to do a good job of compulsory maintenance after the construction of centralized repair and overhaul areas, and replenish ballast in a timely and balanced manner to ensure the stability of the line. Second, welding or freezing the nonstandard joints left over due to scattering, rail changing and other reasons shall be carried out according to the improvement scheme of nonstandard joints in our section, and effective measures must be taken for the sections that cannot be completed before winter. The third is to strengthen the maintenance of frozen joints. We should attach great importance to freezing joints. Based on the principle of inspection and renovation, adjust all rail joints in place and tighten bolts to ensure that the torque reaches the specified standard. 2. Solve key diseases and improve equipment quality. First, strengthen the daily inspection and flaw detection of fish scales, scratches, falling blocks, corrosion or card damage at the bottom corner of the rail, eliminate board hanging diseases, and reinforce or replace severely damaged places. In particular, the damaged area of fish scale development is fast and irregular, so we should attach great importance to it, incorporate it into the patrol inspection focus, and appropriately encrypt the inspection period. The second is to strengthen the renovation of large rail joints. Each line workshop should complete the rail gap adjustment in a planned way before the end of 10, and eliminate the large rail gap of 18mm and above. At the same time, strengthen the daily inspection, found that the problem must be corrected immediately. Thirdly, there are no hanging plates and hidden pits at the joint of thermite welding and air pressure welding, so as to reduce the thickness of the backing plate and remove the backing plate for tamping. Investigate the number of irregular welds and organize secondary grinding in time. Aiming at the air pressure welding and thermite welding joints of swing head rail joint, the bulging splint is uniformly strengthened. Fourth, SC325 turnout timely eliminated the diseases such as the hanging of No.38, No.39 and No.40 pads, the sliding bed plate slipping, and the looseness of the connection part of the vertical cutting part of the heart rail. Aiming at the problem that the distance between the starting point and the tip of the light belt on the top surface of the long core rail is less than 500mm, and the starting point of the circular light belt on the working face is 435mm, the vertical load is borne on the top of the front rail in advance. Fine-tuning shall be done by grinding or padding 1 ~ 2mm under the wing rail, ensuring that the gap between No.38 pad and No.39 pad is 0.5 ~ 2mm ~ 2mm, and the gap between No.39 pad and No.40 pad is not more than 65438.. Fifth, for the places where the rail is seriously corroded at the crossing, attention should be paid to the rail bottom corner cracks and rail breakage caused by serious corrosion. Make up for the blind spot of flaw detection; All worn rails should be replaced gradually. Maintain the relative position standard between the main rail and the guardrail, crossing block (or clamping wood). Sixth, comprehensively adjust the route direction and strengthen the comprehensive improvement of hard bends of rails and joints. In particular, it is necessary to fully adjust the curve, fix the head, tail and line type of the curve, and ensure the smoothness of the curve. Seventh, prevent and rectify the frozen places that have occurred over the years by injecting salt, and strengthen the inspection and rectification of new frozen places. 3. Strictly fold the source. First, strictly control the welding, welding repair and grinding processes, and prohibit the welding repair of the switch point rail and the basic rail; Second, it is strictly forbidden to brutally load and unload, hammer the rails and other human injuries. Before winter, each workshop shall conduct a flat pushing inspection on the steel bar joint, and it is forbidden to press the welding bead with pressure plates and sleepers. Third, the workshop director or foreman must carefully check the appearance quality before the rail and turnout parts go online, and it is forbidden to put defective rail parts on the road. 4.6 1 65438+1October1day to March 15 of the following year, strengthen the manual inspection of rails and key joints. Rail manual inspection shall be organized once a month in the line workshop and once every 15 days in the work area. Focus on inspection of welded joints, frozen joints, insulated joints, scratches, falling blocks, edge adjustment rails, fatigue rails, inclined rails and thermal straightening rails. Strengthen the inspection of weld and joint splint in the cleaning section of the second line of large machinery entering the port, and the flaw detection workshop should arrange the flaw detection work in the later construction section according to the construction progress. Inspection records must be kept for relevant inspections. 5. The key points of strengthening cold patrol work are divided into three parts, namely semi-automatic blocking section, four display blind areas (tuning areas), main turnout and bus lines. (1) Define the inspection period and inspection focus. First, semi-automatic blocking section. Inspection period: at least 1 time every day. Inspection focus: curved sections, sections with many rail comprehensive diseases such as fish scales, falling blocks and side abrasion, and damaged and reinforced areas. The second is four display blind areas (tuning areas). Inspection period: at least 1 time every day. Inspection key points: comprehensively inspect the rail condition within the range of 26m or 29 m, and the third is the main turnout and bus route. In combination with the relevant requirements of the Inspection and Management Law of Turnouts and Passenger Cars on the Main Line of Tianjin Works Section (Gong Jin Line Technology [20 1 4] No.93) on the inspection period in the critical period, it is clear that the inspection period in the break-proof period is every morning and evening1time. Inspection key points: the welding seams of deformed parts of rails on both sides of SC325 turnout frog, the position of rail head and rail bottom 500mm~550mm away from the tip of long-core rail, the welding seam or glue seam connected with the switch rail, and the close connection between basic rail and switch rail, frog and guard rail; For the turnouts connected by the railway, the wear of the switch rail and the basic rail, as well as the fracture and welding of the sliding bed plate are mainly inspected. When manually inspecting the high manganese steel frog, knock, look and take photos, focusing on the fork heart, fork toe, fork heel, throat and other parts. When problems endangering traffic safety are found in the inspection, they should immediately report to the workshop and section, and take decisive measures of stopping, stopping and deducting. ⑵ Strengthen the personal safety control of inspectors. Each inspection must be carried out by two people, and station guards shall be set up to conduct online joint control with the dispatching command center, and the principle of one person for inspection and one person for protection shall be adhered to. (3) Clean up and check the protective spare parts of the tools carried, and check the hammer, 450mm adjustable wrench, feeler gauge, pencil and flashlight. (4) Do a good job in trace management of semi-automatic blocking section. Each workshop should make a rigorous and detailed patrol map, patrol the junction every day, mark the date and the name of the inspector on the rail waist with a pencil, keep the inspection mark for 7 days, and erase it after expiration. 4. Display the blind area (tuning area) and mark it on the rail waist corresponding to the 26m(29m) No Parking sign. At the same time, make paper inspection records of inspection time, rail temperature and equipment status. Main line turnout and bus lane turnout. In accordance with the relevant provisions of the Inspection and Management Law of Main Line Turnouts and Bus Turnouts in Tianjin Works Section (Gong Jin Line Technology [2014] No.93). Intransitive verbs strengthen the technical management of CWR 1. Strengthen the management of track displacement observation. Each workshop shall measure the displacement of jointless track in the pipeline once a month in accordance with the Detailed Rules for the Management of Seamless Track and Turnout in Tianjin Works Section (Gong Jin Line Technology [2065 438] 177), and appropriately increase the observation times according to the equipment condition. When the cumulative displacement of the fixed area of jointless track is found to be greater than 10mm in the line workshop, it shall be reported to the line technical department in time to find out the reasons and take corresponding measures. The workshop shall timely release the actual locked rail temperature data and analysis to the work area under its jurisdiction. During the critical period of anti-breaking, the seamless rail supervisor of the line technology department and the competent cadre of the workshop shall conduct the tracking inspection of rail displacement observation at least twice a month. 2. Section, workshop, work area update technology card, jointless track account, radiation and other technical data. In the technical card, track breaking, track expansion, track replacement, radiation, machine cleaning and various interference foundation construction should be registered item by item. VII. Strengthen the emergency response capability of 1. To improve the emergency plan for rail break, all workshops should investigate and count the emergency passages along the line in advance, comprehensively consider various adverse effects such as rail break prone period and bus concentration period, and study and formulate specific measures to strengthen inspection, rapid response and rapid treatment according to the actual situation of equipment and traffic in the pipeline. Each workshop should revise the emergency plan for track breaking according to the changes of equipment and personnel, so that the process is clear and the division of labor is clear, especially the division of emergency personnel on duty every day in each work area, so as to ensure that drivers and cutters are on duty every day. At the same time, in order to improve the emergency handling ability of emergency repair personnel, all workshops should organize practical drills to prevent rail breakage in workshops, standardize the emergency handling procedures of drills, and enhance the safety awareness and responsibility awareness of rail breakage prevention personnel. Each workshop shall organize all equipment work areas to conduct anti-break drills before June 3 1. Focus on the division of labor, response speed, processing procedures, machine use, information feedback and other aspects to test the actual combat capability one by one, especially for the special equipment that is difficult to deal with and the most unfavorable situation after the rail break, and formulate effective emergency plans. During the damage prevention period, organize damage prevention drills from time to time, and check the drill effect and emergency handling ability of each workshop. At the same time, the anti-crushing drills organized in the future will be compared with track crushing, and the relevant flaw detection data of the drill site will be randomly collected after the on-site drills, and the implementation of the operation standards reflected in the data will be inspected and analyzed. 2. Strengthen spare parts management. Spare rails, short rail heads, splints and other materials on the line, in the anti-breaking emergency vehicle and in the anti-breaking box shall be fully equipped according to the rail model to ensure sufficient quantity. Spare anti-smashing tools and first-aid spare parts in the work area should be placed in a conspicuous position in the special emergency repair room, and can be used once something needs to be taken out. Everyone on duty should know where the tools are and be able to use them. Ordinary plywood, bulging plywood and other standing materials and 6-meter short rails are stored in designated locations. It is forbidden to use anti-smashing tools for other purposes. All kinds of machines and materials on the track-broken ambulance shall be inspected once a week by special personnel, and the track sawing machine, generator and drilling rig used for emergency rescue shall be started, inspected and maintained to ensure that they are in good condition and can be started normally at any time. 3. Strengthen the duty of each workshop and work area, arrange the duty force reasonably, define the system of taking time off to cover the shift, and ensure that the emergency treatment is in place quickly. There are no less than 2 cadres on duty in the workshop every day, and the anti-smashing car is on standby 24 hours a day. During the break prevention, there should be personnel on duty in the working area with equipment, and there should be enough personnel on duty and foremen to deal with the rail break fault every day. In principle, it should not be less than one third of the number of people in the work area, and there should be at least four people (including 1 day shift supervisor) in the work area with less than 12 people. Eight, strictly control the quality of welded rail 1. The temperature of welding rail shall not be lower than 5℃, and severe weather such as strong wind, rain and snow shall be avoided. When rail welding must be carried out in bad weather, corresponding measures should be taken, and the ambient temperature should be higher than 5℃; After pushing, it should be covered with asbestos or other materials until the rail temperature drops below 300℃. 2. When there are holes on both sides of the joint, when the distance between the rail end and the first hole is less than 100mm, welding shall not be carried out. When the distance between the rail end and the first hole is greater than 100mm, the screw hole shall be chamfered to prevent cracks caused by cold and hot shrinkage during welding, which will lead to the fracture of the aluminothermic welded joint. 3. Every step in the process of rail welding should be strictly controlled to ensure the quality of rail welding. 4. The welding records shall be truthfully filled in according to the site construction conditions, and the equipment shall be signed after returning to the workshop. 5. After the daily welding construction of the comprehensive workshop is finished, the completion of the welded rail on that day will be transmitted to the flaw detection workshop in the form of spreadsheet through the public network before 17:00, so that the flaw detection workshop can arrange flaw detection as soon as possible. Nine. Strengthening process control In the critical period of breaking defense, it is necessary to strengthen the inspection and data analysis of cadres at all levels and strengthen on-site guidance. The specific requirements are as follows: Chief and Deputy Chief: conduct spot inspection and flaw detection data playback analysis at least twice a month, conduct on-site flaw detection inspection at least twice a month, and conduct on-site tracking turnout daily inspection at least/kloc-0 times a month; Chief engineer of flaw detection: conduct sampling data playback analysis at least 5 times a month and conduct on-site inspection at least 2 times a month; Chief engineer of jointless track: analyze the full-section displacement observation of jointless track every month, check the rail displacement observation at least twice a month, and grasp the technical changes of jointless track in time; Director and deputy director of flaw detection workshop: on-site flaw detection inspection and data playback analysis shall be conducted at least 5 times a month; Director and deputy director of the line workshop: the turnouts of the on-site personnel on duty shall be inspected daily at least 1 time per month; Inspection workshop support cadres: at least twice a month to participate in on-site inspection operations, participate in data playback analysis; Line workshop guaranteed cadres: check the on-site attendance at least twice a month.