荷兰跨线高架桥----- 外文文献翻译.doc

SUMMARY
In Woerden, a small town in the west of the Netherlands, a railway fly-over has been builtwhere two railway tracks meet. The fly-over consists of a single-track viaduct. This has alength of 438.5 m. The crossing angle is 10 degrees. At the fly-over site the viaduct is suspended from a pylon that has been constructed over two tracks passing underneath.
1. INTRODUCTION
A railway bridge was constructed in Woerden as part of the track expansion of theNetherlands Railways. More trains will be run, the running speeds will be increased and thepossibility of delays must be reduced. In order to make this possible, many line sections mustbe four-track and trains must be able to cross each other at different levels.
This paper examines the fly-over in Woerden.
2. SITUATION AND REQUIREMENTS
The fly-over in Woerden must bridge the following elements:
- two existing tracks;
- two future tracks;
- a polder drainage pool;
- an underpass for all traffic.
The subsoil exhibits a great variation in compressibility. The forecast for settlement after 30years for the adjacent track bed on one side is about 0.5 m and on the other side about 3 m. To limit settlement, and due to the lack of space for access, the construction height of thebridge must be as low as possible.
The existing tracks and the underpass must remain in operation during the constru摘要：在荷兰西部的一个小镇两条铁路相交的地方，一座跨线铁路桥已经修建。这座单线高架桥全长438.5m，交叉角10度，全桥悬吊于一个下面可通过两条铁路的塔式吊架上。
1、说明
这座铁路桥是为了满足荷兰铁路建设扩张时修建的。为了让更多的火车运营，为了提高火车的运营速度，为了减少火车晚点，许多线路段要修成四线，而且火车必须能够在不同的高度上相交错。这篇文章介绍了这座桥。
2、地理环境及要求
这座高架桥必须跨越如下几部分：两条既有线，两条新建线，城市污水排放系统，一条地下通道。
该地区土层压缩系数有很大的变化。据沉降预测，30年后与毗连轨道相邻的一侧将下陷0.5m，而另一侧却要下陷3m。为了减小影响，再加上利用空间的有限，这座桥的建筑高度必须尽可能的小。
在施工期间，现存线路以及下面通过的线路都必须仍然正常运营，而且排水系统的排水量不能受限。
ction. Theflow capacity of the polder drainage pool may not be rest