BS
GEOTECHNICAL SYSTEM AND CONSTRUCTION
Strand anchors
Strand anchors
General about anchors
Geotechnical anchors represent a special element in the group of geotechnical constructions that strengthen the natural terrain behind the soil profile or protective structure in a special way. Anchors transfer the tensile force from the structure to the ground. The shear strength of the surrounding soil is used to transmit the tensile force.
Anchors are relatively thin but long iron rods, or to put it in a different way, they are connected long bundles of steel wires, which are installed and secured in various ways in wells of smaller diameter. In each individual case in practice, it is necessary to carry out an appropriate selection of geotechnical anchors based on carefully considered influencing factors.
Today, the most important prestressed anchors are the ones with linear force transmission from the anchorage to the ground which also have a clearly defined anchor section. Such an anchor represents a geostatic element that is an integral part of the object-anchor-soil assembly, within which there are very complex states of stress and deformation.
Diorit offers rope anchors and rod anchors (SDA and Mikropilots).
Strand anchors
Strand anchors consist of three main components: the anchor head, the steel tendon – divided into the binding part and the free length – and the injection body. The steel tendon is made of several 7-strand prestressed ropes.
Characteristics:
- Nationally approved system with internal and external quality control.
- It can be adjusted to the required loads by selecting the number of ropes, the cross-section of the ropes and the quality of the steel.
- Longer anchor lengths can be produced without joints.
- Relatively low dead weight and small diameter.
- Ease of installation thanks to the high flexibility of the anchor.
- Efficient transport due to the small space required for transport and storage (anchors are supplied on a reel).
Available types:
- Temporary anchors:
- Temporary anchors (service life up to 2 years)
- Temporary anchors for extended short-term use (service life 2-7 years)
- Temporary anchors with detachable free part
Permanent anchors (service life up to 100 years):
In steel grades (see load tables):
- ST 1570/1770 0.60″ (140 mm²)
- ST 1570/1770 0.62″ (150 mm²)
- ST 1670/1860 0.60″ (140 mm²)
- ST 1670/1860 0.62″ (150 mm²)