Self-Drilling Anchors from Magnacore

Magnacore Self-Drilling Anchors

The Magnacore® Self Drilling Anchor (SDA) from Intech Anchoring is a hollow bar injection-bore micropile that serves as an economical solution for challenging soil conditions where installing conventional micropiles may not be the best option. For example, those with collapsible soils (those not conducive to open-hole drilling), large boulders, or other obstructions.

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

Self-Drilling Anchors

Magnacore anchors are self-drilling, meaning that there is no pre-drilling required and grouting is part of the installation process.

Micropiles

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.

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 SDAs for tiebacks, you can save time and is more cost effective with the quick, efficient, all-in-one installation.

Soil Nails

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

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:

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 (P_u)	Yield Load (P_y)	Ultimate Stress (F_u)	Yield Stress (F_y)	Weight
MCR32/15	1.26 in (32 mm)	0.59 in (15 mm)	0.79 in² (510 mm²)	81 kips (360 kN)	63 kips (280 kN)	102 ksi (706 MPa)	80 ksi (549 MPa)	2.69 lbs/ft (4.00 kg/m)
MCR38/18	1.50 in (38 mm)	0.71 in (18 mm)	1.17 in² (752 mm²)	124 kips (550 kN)	101 kips (450 kN)	106 ksi (731 MPa)	87 ksi (598 MPa)	3.96 lbs/ft (5.90 kg/m)
MCR51/29	2.01 in (51 mm)	1.14 in (29 mm)	1.78 in² (1146 mm²)	180 kips (800 kN)	142 kips (630 kN)	101 ksi (698 MPa)	80 ksi (550 MPa)	6.05 lbs/ft (9.00 kg/m)
MCT40/20	1.57 in (40 mm)	0.79 in (20 mm)	1.22 in² (790 mm²)	121 kips (539 kN)	97 kips (430 kN)	99 ksi (682 MPa)	79 ksi (544 MPa)	4.17 lbs/ft (6.20 kg/m)
MCT40/16	1.57 in (40 mm)	0.63 in (16 mm)	1.42 in² (917 mm²)	148 kips (560 kN)	118 kips (525 kN)	104 ksi (720 MPa)	83 ksi (573 MPa)	4.84 lbs/ft (7.20 kg/m)
MCT52/26	2.05 in (52 mm)	1.02 in (26 mm)	1.92 in² (1236 mm²)	209 kips (929 kN)	164 kips (730 kN)	109 ksi (752 MPa)	86 ksi (591 MPa)	6.52 lbs/ft (9.70 kg/m)
MCT76/45	2.99 in (76 mm)	1.77 in (45 mm)	3.89 in² (2510 mm²)	427 kips (1900 kN)	337 kips (1500 kN)	110 ksi (757 MPa)	87 ksi (598 MPa)	13.24 lbs/ft (19.70 kg/m)

Magnacore Micropile & Anchoring System

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