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我段在宝成线全长1464米的某隧道內全部铺设了钢筋混凝土轨枕版。该隧道北端为半径700米的曲线,线路纵断面为3.8～4％的下坡,原限界为蒸汽机车牵引标准,行驶解放型机车。69年决定改为电力机车牵引后,由于隧道净空小,70年局基建部门进行了扩大凈空的改建工作。由于隧道落底未按设计施工,造成道床厚度不够,局部地区枕下无道碴,失去弹性,线路受力不均衡,造成零件折损、线路爬行,线路质量遭到严重破坏。针对线路质量逐漸恶化的局面,我们以批林整风为纲,深入开展“工业学大庆”群众运动,发扬了自力更生,艰苦奋斗,破除迷信,
I paragraph in the Baosheng line a total length of 1464 meters of a tunnel laying of reinforced concrete sleepers. The north end of the tunnel is a curve with a radius of 700 meters. The longitudinal section of the tunnel is 3.8 to 4% downhill. The original boundary is the steam locomotive traction standard, driving the liberating locomotive. After the decision of 69 years to switch to electric locomotive traction, due to the small tunnel clearance, the infrastructure department of the 70-year bureau conducted a reconstruction project to expand headroom. As the tunnel bottoming did not follow the design and construction, resulting in insufficient thickness of the ballast bed, ballast ballast in some areas, loss of elasticity, unbalanced line stress, resulting in parts damage, line crawling, the line quality has been severely damaged. In view of the deteriorating route quality, taking the practice of “rectifying the forest and rectifying the winds” as our key link, we conducted a mass movement of “Daqing in industry” to carry forward the campaign of self-reliance, hard work,