The main materials of bolt body are high-strength steel wire, high-strength steel strand, high-strength finely-rolled rebar and other high-strength steel.
It can stretch freely under tension load. When this part of the elongation is permanently fixed or "frozen", a certain pre-compressive stress is produced on rock mass or various structures.
So the bolt body is the key to realize the anchorage of medium by tension.
At present, the main materials used in the prestressing bolt in our country are high strength steel wire and high strength steel strand, and a small number of projects adopt finish-rolled threaded steel bar.
The connection of high strength finish rolling threaded steel bar relies on the friction force between the contact surfaces of the connectors to prevent them from sliding. In order to make the contact surface have enough friction force, it is necessary to improve the clamping force of the components and increase the friction coefficient of the contact surfaces of the components.
The clamping force between components is achieved by applying pre-tension force to the bolts, so the connectors (finely rolled threaded steel, bolts, etc.) must be made of high strength steel.
Finish-rolled threaded steel bar is a rigid pre-stressed anchor rod. It is made of 40Si2MnV or 45SiMnV high strength steel, and has complete external threads rolled on the whole steel bar.
Connectors or anchors with internal finely rolled threaded steel anchors can be used to connect or anchor any section. The bolt body is easy to construct and safe to anchor.
Jinan Jiazhengqiang Steel Factory sells all kinds of reinforcing steel bars wholesale with abundant supply. It sells high-quality goods and services to all parts of the country. Welcome to contact us at http://www.jzqgc.com./