Magnacore Self-Drilling Anchors

Intech Anchoring supplies contractors with the industry-leading Magnacore Self-Drilling Anchor (SDA). Magnacore is a hollow bar injection-bore micropile that services as an economical solution for challenging soil conditions where installing conventional micropiles may not be the best option – such as those with collapsible soils, large boulders, or other obstructions. The self-drilling anchor allows for placing, drilling, and grouting in an all-in-one installation.

The micropile is formed in a single, top-down operation by the injection of a high-pressure, neat cement grout mixture that is pumped through the bar, while also serving as the drill string. The neat grout mix exits through ports at the end of the sacrificial bit and permeates into the looser adjacent soils forming a competent reinforced grout column.

In addition to outperforming other anchoring systems on the market today, Magnacore puts money back into the pocket of the contractor. The material cost comparison of Magnacore and other hollow bar rods is unmatched.

Because of its unique all-in-one installation process, contractors can save on labor costs as fewer rig operators are required. Installation is also sped up, which saves on hourly wages.

Magnacore Products & Applications

Self-Drilling Anchors

Magnacore anchors are self-drilling, meaning that there is no predrilling required and grouting is completed during installation.

Micropiles

Magnacore Micropiles can be used in a variety of applications. Particularly useful when projects are launched in areas with limited access or weak soil, Micropiles have become a preferred method of deep foundation stabilization for their reliability, versatility, and efficiency.

Tieback Anchors

A tieback is a horizontal rod used to reinforce retaining walls for stability. With one end of the tieback secured to the wall, the other end is anchored into the earth with sufficient resistance. By utilizing Magnacore SDA’s for Tiebacks, you can save time and money with quick, efficient, all-in-one installation.

Soil Retention Anchors

Earth retention systems are constructed to provide support where deep excavations are made, or slope stability is a concern. The design of these systems must consider movement control, stability during construction, and wall drainage. Magnacore can be utilized for jobs specified for slope stabilization, soldier pile and lagging, and tieback anchors.

Magnacore has a full line of hollow bars anchor rods to meet your project’s needs including:

  • R32S
  • R38N
  • R51N
  • T40
  • T52
  • T76S
  • Bearing Plates

All bar options have available anchor couplers with gasket seal, anchor nuts, and sacrificial bits for purchase.

Magnacore can be utilized in a variety of applications, including:

  • Tieback Anchors
  • Micropiles
  • Limited Access Areas
  • Underpinning
  • Soil Retention Anchor
  • Deep Foundations

Solid Bar vs. Hollow Bar

Solid Bar

  • Predrilling required
  • Limited to shallow rock
  • Very stiff throughout soil strata
  • Casing needed in soft soils
  • Pre/Post grouting required
  • Several pieces of equipment

Magnacore SDA Hollow Bar

  • No predrilling
  • Rock at any depth
  • Can be installed in all soil types
  • Casing for lateral loads
  • Grouting completed during install
  • Only need rock drill & grout plant

Components of the Magnacore Self-Drilling Anchor

  1. Hex nut
  2. Termination plate
  3. HDPE Pipe
  4. Soil-cement grout body
  5. Final injection grout
  6. Magnacore self-drilling anchor bar
  7. Coupler
  8. Centralizer
  9. Sacrificial bit
  10. Grout flushing holes

Magnacore Sacrificial Bits

The holes in each bit allow the grout/drilling solution to flow as the self-drilling anchor is advanced, simultaneously creating the column.

            • Tungsten Carbide Button Bit for hard rock (Limestone, shale)

            • Tungsten Carbide Cross Cut Bit for soft rock (sandstone, soft shale, or fractured rocks

            • Clay Bit ideal for mixed fills and clay

Magnacore Products & Applications

U.S. Measurements

Bar TypeR32SR38NR51NT40/16T52/26T76S
Outer Dia1.26 in1.50 in2.01 in1.57 in2.05 in2.99 in
Inner Dia0.59 in0.75 in1.18 in0.63 in1.02 in1.77 in
Area0.81 in21.09 in21.66 in21.40 in21.99 in23.89 in2
Ultimate Tensile Load (Pu)80.93 kip112.40 kip179.85 kip148.37 kip208.85 kip427.14 kip
Yield Load (Py)62.95 kip89.92 kip141.63 kip118.02 kip164.11 kip337.21 kip
Ultimate Tensile Stress (Fu)99.96 ksi103.49 ksi108.42 ksi105.82 ksi104.71 ksi109.80 ksi
Yield Stress (Fy)77.75 ksi82.79 ksi85.38 ksi84.08 ksi82.28 ksi86.68 ksi
Weight2.76 lb/ft3.70 lb/ft5.64 lb/ft4.77 lb/ft6.79 lb/ft13.24 lb/ft

Metric

Bar TypeR32SR38NR51NT40/16T52/26T76S
Outer Dia32 mm38 mm51 mm40 mm52 mm76 mm
Inner Dia15 mm19 mm30 mm16 mm26 mm45 mm
Area520 mm2700 mm21070 mm2905 mm21290 mm22510 mm2
Ultimate Tensile Load (Pu)360 kN500 kN800 kN660 kN929 kN1900 kN
Yield Load (Py)280 kN400 kN630 kN525 kN730 kN1500 kN
Ultimate Tensile Stress (Fu)690 n/mm2715 n/mm2750 n/mm2730 n/mm2720 n/mm2760 n/mm2
Yield Stress (Fy)540 n/mm2570 n/mm2590 n/mm2580 n/mm2570 n/mm2600 n/mm2
Weight4.1 kg/m5.5 kg/m8.39 kg/m7.1 kg/m10.1 kg/m19.7 kg/m

Why Intech Anchoring?

In addition to materials and service, Intech Anchoring will provide continual support through the entire project, including engineering/design, on-site support, load testing, installation expertise, competitive pricing, and rental equipment. Contact us today for more information.