Ground Anchor

Ensuring Stability and Strength in Structural Foundations

Ground Anchors are basically devices used to transmit the forces to the soil by means of prestressed tendon to anchor the Structure to the ground or to retain the slopes from collapsing.

Types of Ground Anchors

prestressed ground anchors

Based on The Anchorage Zone

  • Rock Anchors- Fixed length is anchored in the hard rock
  • Soil Anchors- Fixed length is anchored in the Soil

Based on Nature of Structure

  • Permanent Anchors – Permanent ground anchors have to guarantee their function during the lifetime of the structures to be anchored
  • Temporary Anchors – Prestressed anchors, which have to fulfill their function only for a limited time

Based on How it is installed

  • Vertical Anchors – These anchors are provided vertically into the ground
  • Inclined Anchors – These anchors are provided at an angle into the ground

Based on Application

  • Test Anchors – Test anchors are specially design anchors subject to extensive tests in order to obtain, either comprehensive information on anchor capacity and geo-technical conditions OR to prove the quality and adequacy of design, material and construction.
  • Control Anchors – Control anchors are anchors in or beside the structure used for long-term observation. They are often equipped with devices, which monitor the variation of forces and displacement.

Applications

  • Dam Tie-Downs
  • Temporary Excavation Support
  • Slope Surface Stabilization
  • Permanent Tieback Systems
  • Foundations

Components of the Anchor

  • H T Strand - 12.7 mm or 15.2 mm Dia.
  • Anchor Head
  • Thrust Plate
  • MS/HDPE Sleeve
  • Spacers

Methodology

Rock anchoring work is carried out in the following steps:

  • Drilling
  • Water Test ( Permeability test)
  • Virgin Grouting
  • Homing
  • Primary Grouting ( Fixed length grouting)
  • Stressing
  • Secondary Grouting

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