Tieback & Ground Anchors
Tieback anchors, also called ground anchors, are active earth retention systems wherein an anchor is stressed against a bearing surface. These systems are typically used in earth retention walls and landslide stabilization and have applications for building retrofitting. Tieback anchors can be designed to be temporary or permanent, depending on the level of corrosion protection applied. Drill Tech has successfully installed and tested tieback anchors with up to 1,200-kip capacities, some of which were over 250 feet long.
Construction Process
Tieback anchors are constructed with an “unbonded” and “bonded” length. The “unbonded” length is the portion of the steel bar or strand which is allowed to elongate freely; this portion of the tieback anchor prevents load transfers to areas too close to existing utilities or on failure planes. The “bonded” length is the part of the steel that is bonded to the grout of the tieback anchor. This length transmits the applied load into the ground using the friction between the grout column and ground. For permanent projects, the anchors are corrosion protected with epoxy coating or corrugated plastic sheathing. In temporary shoring applications, bare steel strands or bars are used instead.
Benefits of Use
Drill Tech’s fleet of equipment contains both purchased and self-designed drill rigs. Our fleet allows us to install tieback anchors in almost any type of ground.
Applicable Projects
Solider Pile Retaining Structures
Slope & Landslide
Stabilization
Anchored Shoring Systems
(CSM, Sheet & Secant Piles)
Rock Anchors
Seismic Retrofits of
Existing Structures
Construction Process
Tieback anchors are constructed with an “unbonded” and “bonded” length. The “unbonded” length is the portion of the steel bar or strand which is allowed to elongate freely; this portion of the tieback anchor prevents load transfers to areas too close to existing utilities or on failure planes. The “bonded” length is the part of the steel that is bonded to the grout of the tieback anchor. This length transmits the applied load into the ground using the friction between the grout column and ground. For permanent projects, the anchors are corrosion protected with epoxy coating or corrugated plastic sheathing. In temporary shoring applications, bare steel strands or bars are used instead.
Benefits of Use
Drill Tech’s fleet of equipment contains both purchased and self-designed drill rigs. Because of our extensive experience with tieback anchors, we’ve built our own reach-over drill rigs, hanging drill masts, limited access drill rigs, and high-reach drill rigs. We’ve also designed and constructed drill masts for excavators, forklifts, and drill baskets—these last masts are supported by a crane. Our fleet allows us to install tieback anchors in almost any type of ground.
Applicable Projects
Solider Pile Retaining Structures
Slope & Landslide
Stabilization
Anchored Shoring Systems
(CSM, Sheet & Secant Piles)
Rock Anchors
Seismic Retrofits of
Existing Structures
Construction Process
Tieback anchors are constructed with an “unbonded” and “bonded” length. The “unbonded” length is the portion of the steel bar or strand which is allowed to elongate freely; this portion of the tieback anchor prevents load transfers to areas too close to existing utilities or on failure planes. The “bonded” length is the part of the steel that is bonded to the grout of the tieback anchor. This length transmits the applied load into the ground using the friction between the grout column and ground. For permanent projects, the anchors are corrosion protected with epoxy coating or corrugated plastic sheathing. In temporary shoring applications, bare steel strands or bars are used instead.
Benefits of Use
Drill Tech’s fleet of equipment contains both purchased and self-designed drill rigs. Because of our extensive experience with tieback anchors, we’ve built our own reach-over drill rigs, hanging drill masts, limited access drill rigs, and high-reach drill rigs. We’ve also designed and constructed drill masts for excavators, forklifts, and drill baskets—these last masts are supported by a crane. Our fleet allows us to install tieback anchors in almost any type of ground.
Applicable Projects
Solider Pile Retaining Structures
Slope & Landslide
Stabilization
Anchored Shoring Systems
(CSM, Sheet & Secant Piles)
Rock Anchors
Seismic Retrofits of
Existing Structures
