Ground Anchors

DYWIDAG Ground anchors actively contribute to the stability of a structure throughout its design life.

Characteristics

  • Ground anchors are unique as they are able to provide active restraint to structures

  • Anchors avoid movements by applying a compressive load to a structure

  • DYWIDAG data-enabled anchors provide a range of remote monitoring services—driving informed decision-making.

Anchors are used in

The application of ground anchors is increasing as they enable construction in densly populated areas. This increase is due to the reductions in available space for traditional construction methods. 

In areas of limited easement, removable anchors can be used. For projects where further underground construction, like adjacent developments or tunnels, is anticipated, engineers can use cuttable anchors produced from composite materials.

How ground anchors work

Pre-stressed ground anchors actively contribute to the stability of a structure throughout its design life. The performance of the anchor is critical to the stability of the structure. 

Stressing jacks are used to pre-stress the anchor and elongate the tendon. Once the necessary load has been established, the anchor is locked off at the head. The anchor then applies a compressive load to the structure to arrest movement.

The anchor is un-bonded from the ground between the structure and the load-bearing strata to prevent load from being transferred into unsuitable material—and to ensure sufficient elongation of the tendon is possible.

Upon reaching the desired depth, the tendon is directly bonded to the ground, forming the two fundamental elements of the ground anchor—the free length and the bond length. 

In permanent works, anchors need to be protected against corrosion in line with internationally recognized anchor design standards. Double corrosion protection (DCP) provides protection with two independent barriers between the anchor tendon and the environment.  

Introducing DYWIDAG smart technologies

Smart Anchors are the first in a series of smart products developed by DYWIDAG. We’re digitizing our traditional geotechnical and post-tensioning technologies.

Find out more about Smart Anchors on this page.

Projects

Temporary or permanent options

Bond length and free length to enable prestressing

Capacities: bars 4,500kN {20,000 kips}, strand 15,900kN (+) {70,000 kips}

Bar anchors with diameter range 25-75mm {1-3 inch}, strand anchors up to 61mm (+)

Full compatibility with Infrastructure Intelligence, utilizing multiple sensor types