The geographical location of the turnout group of the general speed yard under the jurisdiction of the patrol station of XX station in the workshop of XX line in the works section is very important. It can be said that the quality of our equipment directly affects the safe operation of the train. However, with the increase of the total weight of turnouts, the improvement of train speed and the aging of equipment, it is difficult for the original track structure to control the changes of turnouts, which makes the line, especially the turnouts, unable to be effectively controlled and improved, and the creeping is becoming more and more serious, leaving a huge safety hazard for railway transportation safety. Compared with line crawling, turnout crawling is more harmful. It will not only bring diseases caused by the crawling of the whole line, but also cause diseases in the switch part of the turnout, which will bring great safety hazards to the traffic safety. Therefore, it is necessary to strengthen the prevention and control of turnout crawling.
Group Profile Name Wei Changxin Ren Xinfu Changqing Age 38 54 54 4 1 46
Gender Male Male Male Male Male Male Male Male Male Male Male Male Title Stationmaster Production Line Worker Deputy Director Production Line Worker Post Technical Guidance Team Leader
Second, the reason for selecting the topic is that the creeping in the turnout area is more harmful than that in the ordinary line area, which will not only produce blind joints or large rail joints, but also damage the rail joints and connecting parts; The bad track gauge direction caused by pulling the inclined turnout sleeper makes it difficult to maintain the tamping quality, and empty hanging plates appear, which aggravates the potholes on the track surface; In addition, crawling in the turnout area will cause the switch part of the turnout to be skewed, which will lead to the fracture of the column bolt, the immobility of the switch rail or the untidy pasting of the switch rail, which will directly endanger the driving safety.
Three. Investigation of the present situation Through careful observation and comparative analysis of four groups of track switches (25#, 33#, 37# and 39#) with serious crawling in the pipeline, QC team found that although there are many reasons for the crawling of switches, the main ones are as follows: 1. The function of anti-climbing device and anti-climbing wooden brace is missing or bad, which leads to turnout crawling;
2. Insufficient torque of turnout spare parts, spike falling off, leading to turnout crawling; 3. One-way running of heavy vehicles causes the turnout to crawl to one side;
4. There is no ballast and boiling at the turnout in the station, which leads to insufficient track strength and aggravates turnout crawling;
5. The sleeper spacing is incorrect, and the rail crawling force cannot be transmitted to the ballast bed due to skew and failure;
6. The track is uneven and in poor geometric state, which causes the track to bounce when the train passes, reduces the resistance of the ballast bed, and increases the impact of the wheel on the track with joint clearance, resulting in crawling and mutual influence.
ItemNo. 123456 Torsional tumbling of missing parts of anti-climbing timbers and geometric state of track potholes with missing sleeper spacing, other calculations 32132500343213250034 Watchmaking: Wang Changxin.
Four, the specific measures to control the turnout crawling
1. Replace the invalid sleepers, strengthen the sleeper's nail holding force, increase the number of sleepers before and after the turnout, and reduce the sleeper spacing to strengthen the clamping force of the pad and sleeper on the rail;
2. Even the rail gap, fully tighten the connecting bolts and increase the contact surface between the splint and the rail, thus increasing the friction between the splint and the rail to lock the rail gap and resist the longitudinal displacement of the rail;
3. Clean up unclean ballast beds and frost boiling diseases in time, strengthen line maintenance, eliminate joint diseases and continuous height, eliminate line diseases such as empty hanging plates and triangular pits, and keep turnout lines smooth and good. Thereby reducing the impact of wheels on lines and turnouts and the creeping force of turnouts;
4. For square turnout sleepers, drill holes at the waist of the rail, use bolt-type rail supporting pads (every two) instead of ordinary pads, and tighten waist bolts (installed on the rail part of the turnout and on the front and rear rails outside the turnout) to enhance the frame strength of the rail, increase the binding force between the rail and the pad, and at the same time increase the binding force between the sleeper and the rail, thus not only preventing the rail from jumping, but also transmitting the crawling force borne by the rail to the sleeper and the ballast bed;
5. Complement the ballast work in a planned way and tamp the ballast bed. Ensure that the ballast in the turnout group is sufficient and the ballast bed is full, and increase the ballast bed resistance with the full and dense ballast bed to prevent the turnout and the front and rear tracks from moving and crawling laterally;
6. Replace the missing or damaged anti-creeper in time, tighten the failed pin-type anti-creeper (the pin-type anti-creeper should be pressed against it), repair the failed anti-creeper, and set it in strict accordance with the standard of 2 pairs of anti-creeper and 3 pairs of anti-creeper, so as to give full play to the role of the anti-creeper. For sections with large creepage distance and insufficient installed anti-climbing equipment to lock lines and turnouts, the number of anti-climbing equipment should be increased. The turnouts are provided with anti-climbing wood supports in rows between sleepers, and the whole group of turnouts are interlocked to form a rectangular frame structure to lock the line and turnouts;
7. In some sections, turnout crawling is particularly serious. If there is no rail gap before and after the turnout, it can be used, or the crawling direction of the front and rear turnout is opposite, so it is impossible to simply adjust the crawling. Construction should be arranged in time to replace the front and rear guide rails of the turnout and the traction work of the whole turnout.
Verb (abbreviation of verb) remediation effect Through the implementation of the above measures, it can be said that the interaction between rail, pad, sleeper and ballast bed is fully utilized, which really increases the lateral resistance of rail in turnout area, so that the longitudinal force of track frame is evenly transmitted to ballast bed, thus reducing track crawling and rail lateral movement, controlling the geometric state of turnout and front and rear lines, prolonging the service life of the whole track, enhancing the safety factor of driving, and ensuring the safety and stability of driving!
Conclusion Through the above efforts, the creeping phenomenon of turnout has been temporarily suppressed, and the structure and state of turnout in the pipeline have been improved. However, in the face of the development of high-speed and heavy-haul railways, our treatment of rail bifurcation diseases is like sailing against the current. If we relax a little in our work, diseases will breed again and again. Therefore, in the future work, this QC team will always focus on the theme of "safety and quality", constantly improve their professional quality and skills, strengthen on-site exploration and research, and find a better way for the treatment of on-site diseases.