Magnacore Self-Drilling Anchors

The micropile is formed in a single, top-down operation by the injection of a high-pressure, neat cement grout mixture, which is pumped through the bar and serves as the drill string. The neat grout mix exits through grout ports at the end of the sacrificial bit and permeates into the looser adjacent soils. This mix and permeation are what forms the competent reinforced grout column.
Magnacore Products & Applications
Magnacore anchors are self-drilling, meaning that there is no pre-drilling required and grouting is part of the installation process.
Magnacore micropiles are suitable for a variety of applications and are particularly useful with projects 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.
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 SDAs for tiebacks, you can save time and is more cost effective with the quick, efficient, all-in-one installation.
Earth retention systems are constructed to provide support where deep excavations are required or slope stability is a concern. The design of these systems must consider movement control, stability during construction, and wall drainage. Magnacore can be used for jobs specified to stabilize slopes, for soldier pile and lagging, and tieback anchors.
Solid Bar vs. Hollow Bar
Solid Bar
- Pre-drilling required
- Limited to shallow rock
- Very stiff throughout soil strata
- Casing needed in soft soils
- Pre- and 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
How To Install Magnacore
Magnacore Applications
- Micropiles
- Earth retention
- Tieback Anchors
- New construction
- Underpinning
- Settlement/stabilization
- Slope stabilization
- Tunneling
- Limited Access Areas
- Deep Foundations
Benefits of SDAs
- Difficult soil conditions
- High installation rate
- Limited access
- No casing required
- Extra corrosion protection
- Decreased labor & material cost
Magnacore Components

Magnacore Sacrificial Bits
The holes in each bit allow the grout/drilling solution to flow as the SDA is advanced, simultaneously creating the column.
- Carbide Cross Cut Bit for softer sedimentary rocks such as marls, mudstones, siltstone
- Carbide Button Bit for sand, fills, gravel
- Clay Bit for clay, soft soil, marls, loose sand, or gravel
- Carbide Tri-Blade for competent ground, strong rock
- Tri-Blade for chalk, gravel
Magnacore Bar & Accessory Options
Magnacore has a full line of hollow bars anchor rods to meet your project’s needs including:
- R32
- R38
- R51
- T40
- T52
- T76
Our standard stock length of bar are 4.92 ft (1.5 m) and 9.84 ft (3 m). The standard bar is non-galvanized. Galvanized bars can be ordered custom.
Special orders can be placed for custom bar lengths, sizes, and bit sizes.
Magnacore’s full line of accessories:
- Couplers
- Hex Nuts
- Drill Bit Adapters
- Spherical Nuts
- Sleeved Pipe
- Centralizers
- Bearing Plates
- Bevel Washers
Magnacore Specifications
Bar Type | Outer Diameter | Inner Diameter | Area | Ultimate Load (Pu) | Yield Load (Py) | Ultimate Stress (Fu) | Yield Stress (Fy) | Weight |
---|---|---|---|---|---|---|---|---|
MCR32/15 |
1.26 in |
0.59 in |
0.79 in2 |
81 kips |
63 kips |
102 ksi |
80 ksi |
2.69 lbs/ft |
MCR38/18 |
1.50 in |
0.71 in |
1.17 in2 |
124 kips |
101 kips |
106 ksi |
87 ksi |
3.96 lbs/ft |
MCR51/29 |
2.01 in |
1.14 in |
1.78 in2 |
180 kips |
142 kips |
101 ksi |
80 ksi |
6.05 lbs/ft |
MCT40/20 |
1.57 in |
0.79 in |
1.22 in2 |
121 kips |
97 kips |
99 ksi |
79 ksi |
4.17 lbs/ft |
MCT40/16 |
1.57 in |
0.63 in |
1.42 in2 |
148 kips |
118 kips |
104 ksi |
83 ksi |
4.84 lbs/ft |
MCT52/26 |
2.05 in |
1.02 in |
1.92 in2 |
209 kips |
164 kips |
109 ksi |
86 ksi |
6.52 lbs/ft |
MCT76/45 |
2.99 in |
1.77 in |
3.89 in2 |
427 kips |
337 kips |
110 ksi |
87 ksi |
13.24 lbs/ft |
We're here to help!
Contact your Intech business
development manager to assist
you on your next project. Or,
contact Intech Engineering for
assistance in designing your
next micropile project.