Ground Anchors for Microdrilling Applications | Casagrande Group

Anchors

High-performance ground anchors for load transfer, excavation support and structural stabilisation in soil and rock.
Overview

Overview

Ground anchors are structural elements installed in soil or rock to transfer tensile loads from a structure to stable ground layers. They are widely used in excavation support, retaining structures, slope stabilisation and uplift resistance applications.

The system typically consists of a drilled borehole, a steel tendon or bar, and a cementitious grout that bonds the anchor to the surrounding ground. Once installed and grouted, the anchor is tensioned to apply the required preload and ensure structural performance.

Depending on project requirements and geotechnical conditions, anchors can be executed as:

  • Temporary anchors
  • Permanent anchors
  • Active (prestressed) anchors
  • Passive anchors

Anchor technology ensures high load capacity and precise force control, even in confined or complex environments, making it suitable for infrastructure, urban construction and geotechnical stabilisation works.

How it works?

1

Machine positioning and drilling start

The drilling rig is positioned and aligned to achieve the required inclination and depth.
2

Borehole drilling

A rotary or rotary-percussive drilling system advances the borehole to the design length through soil or rock.
3

Installation of steel tendon or bar

The steel reinforcement element is inserted into the borehole.
4

Grouting operation

Cementitious grout is injected to create the bond between the anchor and the surrounding ground.
5

Tensioning and locking-off

After grout curing, the anchor is tensioned to the specified load and secured with a bearing plate and anchorage head.
How it works?

Advantages

  • ✓ High tensile load capacity
  • ✓ Precise force control through tensioning
  • ✓ Suitable for soil and rock applications
  • ✓ Low vibration and minimal disturbance
  • ✓ Ideal for confined and urban environments

Limitations

  • ⚠ Requires adequate bond length in competent ground
  • ⚠ Performance depends on proper grouting and curing
  • ⚠ Corrosion protection required for permanent anchors
  • ⚠ Load testing and monitoring may be necessary
  • ⚠ Installation may be limited in highly variable ground conditions or restricted drilling areas

Compatible Casagrande equipment

C3

C3

  • Diesel Engine Power 100 kW
  • Max. torque 15,2 kNm
  • Rotary Head Stroke 3200 mm
  • Extraction/Crowd force 50/50 kN
  • Weight 6,7 t
C4

C4

  • Diesel Engine Power 100 kW
  • Max. torque 12,2 kNm
  • Rotary Head Stroke 4020 mm
  • Extraction/Crowd force 50/50 kN
  • Weight 8.5 t
C5R

C5R

  • Diesel Engine Power 111 kW
  • Max. torque 15,2 kNm
  • Rotary Head Stroke 4050 mm
  • Extraction/Crowd force 60/60 kN
  • Weight 10 t
C5

C5

  • Diesel Engine Power 115 kW
  • Max. torque 17,7 kNm
  • Rotary Head Stroke 4050 mm
  • Extraction/Crowd force 65/65 kN
  • Weight 13 t
C6

C6

  • Diesel Engine Power 142 kW
  • Max. torque 22,2 kNm
  • Rotary Head Stroke 7300 mm
  • Extraction/Crowd force 100/100 kN
  • Operating Weight 15 t
C6-2

C6-2

  • Diesel Engine Power 142 kW
  • Max. torque 22,2 kNm
  • Rotary Head Stroke 7300 mm
  • Extraction/Crowd force 100/100 kN
  • Weight 15 t
M9

M9

  • Diesel Engine Power 209 kW
  • Max. torque 30 kNm
  • Rotary Head Stroke 5400 mm
  • Extraction/Crowd force 100/100 kN
  • Weight 21 t
C7

C7

  • Diesel Engine Power 186 kW
  • Max. torque 70 kNm
  • Rotary Head Stroke 10000 mm
  • Extraction/Crowd force 100/100 kN
  • Operating Weight 22 t
C9

C9

  • Diesel Engine Power 209 kW
  • Max. torque 70 kNm
  • Rotary Head Stroke 10060 mm
  • Extraction/Crowd force 150/150 kN
  • Weight 27 t