一、南美的庞大铁路规划南美的委内瑞拉、哥伦比亚、厄瓜多尔、秘鲁和波利维亚等国计划合资修建一条连接这些国家的铁路。该铁路拟建于科迪勒拉山系东侧,北起委内瑞拉的加拉加斯,沿亚马逊平原边缘南下,接玻利维亚的拉巴斯,整个线路呈弓形,全长4350km,其中有650km 线路在委内瑞拉境内。线路最小坡度为1‰,最大坡度为5‰,有很多地段线路为几十公里的直线。修建该线技术上的主要困难是要穿过沼泽区和跨越宽阔的河流,解决的办法是在沼泽区修筑 I. Large Railway Planning in South America South American countries such as Venezuela, Colombia, Ecuador, Peru and Bolivia plan to jointly build a railway connecting these countries. The railway is to be built on the east side of the Cordillera Mountains and Caracas in Venezuela in the north. It follows the edge of the Amazon Plain to the south and leads to La Paz, Bolivia. The entire route is arched with a total length of 4,350 km, of which 650 km is in Venezuela . Line minimum slope of 1 ‰, the maximum gradient of 5 ‰, there are many sections of the line for dozens of kilometers of straight line. The main technical difficulty in constructing this line is to cross the marsh and across the wide river, and the solution is to build it in the marsh