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Helical anchors consist of an extendable steel shaft with helical bearing plates. Piles or piers refer to strong base elements that withstand or transfer vertical/horizontal loads. Anchors are piles utilised only in tension applications like restraining wall tiebacks or vertical ground anchors made to resist overturning forces.
A load-sharing (or load-distributing) anchor is a system consisting of two or more individual anchors which join together at a main anchor point to form an anchoring system. This configuration is a way to introduce redundancy and increase strength, typically for a belay anchor.
The anchor selection, together with additional reinforcement, and rigging arrangements is influenced by: - The dead weight of the element - The number of anchors in the element and the configuration of the anchor - Capacity of the anchor at the specific concrete compressive strengths at time of lift - The dynamic loads applied during lifting ...
The magnitude of total anchor force required in the tieback can be determined by analyzing the soil and groundwater properties as well as sources of external loads applied to the system. [ 2 ] The bond length of the tieback must extend beyond the potential critical failure surface of the soil.
Bonded anchors are also referred as adhesive anchors [9] or chemical anchors. The anchoring material is an adhesive (also called mortar) [3] usually consisting of epoxy, polyester, or vinylester resins. [1] In bonded anchors, the force-transfer mechanism is based on bond stresses provided by binding organic materials.
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Vertically-loaded anchors (VLAs) are essentially DEAs that are free to rotate about the fluke-shank connection, which allows the anchor to withstand both vertical and horizontal loading and thus, unlike DEAs, mooring lines may be in either a catenary or taut-moored configuration. VLAs are embedded as DEAs are, over a specified drag length.