CHANCE® Helical Tieback Anchors
CHANCE® Helical Tieback Anchors are anchoring systems used to horizontally reinforce and stabilize permanent and temporary structures subjected to lateral loads from earth and water. Helical tieback anchors are used in conjunction with a variety of earth retaining systems such as sheet piles and soldier piles in order to provide additional lateral resistance beyond what is achievable by a cantilevered wall. The success of the helical anchor tieback system dates back to decades of similar use of CHANCE® Anchors in the electric utilities industry. Capacities up to 200,000 lbs. per anchor are obtainable with this quick and cost-effective tieback system.
Nothing but advantages
For predictable, cost-effective and quick tieback installation, nothing beats a helical tieback anchor. CHANCE® Helical Tieback Anchors are reusable and save labor, keeping crews, equipment and costs minimal. Without the need for grout or concrete, you won’t have to wait for curing to post tension the anchor, and there's no need for de-watering a site with a high water.
When you control torque, you control capacity.
Helical tieback anchors are installed into retained soil with commonly available hydraulic rotary drilling equipment. Once the minimum length is obtained, the capacity is determined by reading the installation torque and correlating it to the holding capacity ratio of the soil strength. Once the specified capacity is obtained, the tiebacks are then immediately tensioned and tested without the need for curing time or spoils cleanup, saving a tremendous amount of project time and cost.
Advantages of utilizing CHANCE® Helical Tieback Anchors in your earth retention applications:
- Maximizes flexibility with changing soil conditions
- Can install with readily available construction equipment
- No spoils to remove
- No concrete trucks or grout pumps needed
- Predictable capacity proportional to installation torque
- Installs in any weather condition
- Immediate proof testing and tension loading
- Minimizes labor costs
- Anchors can be extracted for use on future projects
- Installs in limited access areas
See how CHANCE Helical Tieback Anchors were used in this case study: