2015-07-21
253
I. Decide whether the following statements are true or false according to the text:
1. Cable-stayed bridges resemble cantilever bridges.
2. In cable-stayed bridge the cables that support the roadway are connected to the towers.
3. A cable-stayed bridge may be used when its foundation can support two towers.
4. Most cable-stayed bridges have 3 spans and two towers.
5. The cables may be linked from the roadway to the towers in several way.
6. If the cables are connected from a variety of points on the roadway to several points on the towers, they form a star pattern.
7. There are four types of moveable bridges.
8. A bascule bridge tilts backward to open.
9. A vertical lift bridge has a roadway that extends between two towers.
10. A swing bridge is mounted on a central tower.
II. Answer the questions:
1. What type of bridge do cable-stayed bridges resemble?
2. How are cables connected?
3. What is the design of most cable-stayed bridges?
4. When do the cables form a fan pattern?
5. When do the cables form a star pattern?
6. What are the types of moveable bridges?
7. How do bascule bridges operate?
8. Where is a roadway situated in a vertical lift bridge?
9. Where is a swing bridge mounted?
10. Why does it move sideways?
