“专桥1000,1001,1005” =2·4～20mOT-3铪梁及輔助設备设计的整顿工作,目前正在进行。修改的主要内容及情况如下: (一)由于技术規范及設計原則改变,而进行修改的,有以下几項: ①根据新的“标准軌距铁路設計技术規范”对道床頂面宽度规定。由于我們仍然采用木枕的线路布置为主,则道碴頂面宽度为3·0m边坡为1:1.75在半徑为600m及以下的曲线上,曲线外侧另加0.1m,而且将边墙高由25cm改为30cm。这样,枕木底依然高出边墙顶2cm,既可抽换枕木又防止掉碴。还可以代替成都会议规定的:对无人行道的梁其外側加度 “Bridge 1000,1001,1005” = 2.4 ~ 20mOT-3 hafnium beam and auxiliary equipment design rectification work, is currently under way. The main contents and situations of the amendments are as follows: (1) Due to the changes of technical specifications and design principles, the following items are revised: (1) The width of the top surface of the ballast bed is stipulated according to the new “technical specifications for standard gauge railway design”. As we still use the main line layout of the wooden pillow, the ballast top width of 3.0m slope 1: 1.75 in the radius of 600m and below the curve, the curve plus 0.1m outside, and the wall height by 25cm to 30cm. In this way, the top of the sleeper is still 2cm above the edge of the wall, which can both replace the sleepers and prevent ballast. Chengdu meeting can also replace the provisions of: no increase on the outer side of the beam of the road