Aes

These rigs are often used basically for Basalt or Breccia where the required quality of the rock is very high By Hydraulic Rig (DTH Method): In this process, the Pile is directly drilled throughout to the designed depth.

Providing and installing Micropiles using Down-The-Hole (DTH) drilling technique for load transfer, foundation strengthening, and stabilization works as per approved design, drawings, and specifications.

The work includes:

• Drilling of boreholes of specified diameter (typically 100–250 mm) and depth using DTH drilling equipment through all types of soil and hard rock strata.

• Cleaning of boreholes to remove cuttings and ensure full depth penetration.

• Supply and installation of high-strength steel reinforcement (thread bar or casing) with centralizers as per design requirements.

• Grouting of boreholes with cementitious grout under controlled pressure using suitable grout pumps and packers to achieve full bond length.

• Testing of micropiles (proof or load testing) to verify design capacity and performance.

• Includes all materials, labour, tools, equipment, compressors, drilling rigs, grouting setup, scaffolding, and safety arrangements for complete and satisfactory execution of the work as directed by the Engineer-in-Charge.

Providing, drilling, installing, grouting, and tensioning of Prestressed Rock Anchors for stabilization of slopes, retaining structures, foundations, and other geotechnical applications, as per approved design and specifications.

The work includes:

• Drilling of boreholes of required diameter and depth through soil or rock strata using rotary or percussion drilling methods.

• Supply and installation of high-tensile steel tendon assemblies, consisting of single or multiple strands/bars with necessary corrosion protection sheathing, centralizers, and grout vents.

• Grouting of boreholes in stages with cementitious grout under controlled pressure to ensure complete encapsulation and bonding between tendon and surrounding rock.

• Installation of bearing plates, wedges, anchor heads, and stressing equipment as per design requirement.

• Tensioning (prestressing) of anchors using hydraulic jacks to the specified load and locking-off at the designed force.

• Recording and documentation of load–elongation test results during stressing and acceptance testing.

• Includes all materials, labour, tools, equipment, grouting pumps, jacks, gauges, and safety arrangements required for the complete and satisfactory installation of anchors as directed by the Engineer-in-Charge.