Research Of Maintenance Techmology For Interre Gional Lwr

Interregional LWR is a kind of track structure which applies for high speed and heavy haul operation. Because of joint free rail, track structure is strengthen, riding condition is optimized, railway condition is improved, material of maintenance and consume of staff is reduced, and advantage of LWR is obvious. So LWR has been trend of rail track development in china.The development of interregional LWR is summarized, many test in this domain in our country is introduced, and a great deal of practice experience is summed up in this paper. According to these experience, I think that improving the quality of rail weld, success of glued insulated joint and developing swing nose frog are precondition of generalizing interregional LWR.Basic structure and theory of LWR are elaborated in this paper. In order to meet the requirement of high speed and heavy haul operation, interregional LWR and turnout should be welded together, and turnout must be welded into joint free turnout. It can be concluded that 60 Kilogram per meter or heavier rail, model II and ID concrete ties, model Hand III fastenings, glued insulated joint, high quality ballast, and joint free turnout are track structures which accord to interregional LWR.Two kinds of key technology for interregional LWR, disposal of glued insulated joint and application of swing nose frog turnout, are researched in this paper. Two kinds of technology for glued insulated joint, gluing rail in factory and glued insulated bar, are also developed. Comparing effect of gluing rail in factory with glued insulated bar's, I think that technology of glued insulated bar is more applied and more convenient to generalize on the spot. Character of structure and condition of maintenance for swing nose frog turnout are summarized, then, it can be concluded that turnout is a key point of paving interregional LWR.Maintenance technical specifications, technical standard and methods of interregional LWR are disserted in this paper. It can be brought forward that the track should be rebuild before paving interregional LWR, and in early days, the track should also be repaired. In order to keep LWR stable, preferred rail laying temperature must be controlled strictly in daily maintenance. Maintenance of jointfree turnout is emphases in track maintenance. In order to extend service life of equipments for interregional LWR, the turnout should be locked strengtheningly, and problems of base should be solved in time.Maintenance technology of interregional LWR in ZhengWu sect of JingGuang line in this paper, these technology have good effects in instructing work on the spot. And the glued insulated bar is in fever of generalizing interregional LWR. So the conclusions in this paper have some directing roles in paving interregional LWR in other railway bureau.