DSI-USA DYWI Drill Hollow Bar System En

7/25/2019 DSI-USA DYWI Drill Hollow Bar System En

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DYWI Drill Hollow Bar SystemSoil Nails Micro Piles Ground Anchors Rock Bolts

Reno ReTRAC Project, Reno, NV


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Reno ranks among the US cities

with the highest quality of life and

the best environment for families.

In the past few years the citys booming

economy has also led to a strong

increase in rail traffic, in particular in

downtown Reno. With the Reno

ReTRAC Project (Reno Transportation

Rail Access Corridor) the city of Reno

wanted to eliminate traffic jams,

accidents and emissions at at-grade

rail crossings. For this reason, rail traffic

was relocated below ground into a

3.3 km long and 10 m deep troughstructure along the existing railroad line.

DYWI Drill System secures

Trough Structure for Railroad, Reno, USA

The Reno ReTRAC project in Reno, Nevada, USA

Owner City of Reno, Nevada, NV, USA +++ General Contractor Granite Construction, CA, USA +++ Design Team Leader Parsons,

CA, USA +++ Project Management Jacobs Engineering Group, CA, USA +++ Sub Contractor (Shoring Contractor) Schnabel Foundation

Co., CA, USA

DSI Services Supply of more than 8,000 R38 DYWI Drill Hollow Bars supporting 180,000 SF of soil nail wall

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General Notes ............................................................................................................4

Technical Data............................................................................................................5

Drill Bits......................................................................................................................6

DYWI Drill Hollow Bar System - Installation ............................................................7

DYWIDAG Soil Nails ..................................................................................................8

Micro Piles .................................................................................................................9

Temporary Ground Anchors.....................................................................................10

Rock Bolts & Spiles .................................................................................................11

DYWI Drill Hollow Bar System - Installation Accessories......................................12

Stressing and Testing...............................................................................................13

References...............................................................................................................14

Contents

Details, dimensions and system designsare subject to change without notice.

Refer to installation manual for furtherdetails.

www.dsiamerica.com

DYWI Drill Bar Installation in Reno, NV


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DYWI Drill Hollow Bar System

General Notes

The DYWI Drill Hollow Bar System is a

fully threaded steel bar which can be

drilled and grouted into loose or collap-

sing soils without a casing. The bar fea-

tures a hollow center for simultaneous

drilling and grouting and a rope thread

for connection to standard drill tooling.

Manufactured by cold rolling heavy wall

steel tubing, DYWI Drill Hollow Bar

forms a standard rope thread profile

(R25 - R51, T76 has a trapezoidal

thread). The rolling process refines the

grain structure of the steel, increasing

the yield strength and producing adurable drill rod suitable for a range of

applications.

DYWI Drill Hollow Bars can be installed

into a variety of different soils and

ground conditions ranging from sand

and gravel to inconsistent fill, boulders,

rubble and weathered rock, as well as

through footings and base slabs.

Installation Advantages

Ability to work with small drill rigs

without casing in narrow spaces

Similar installation methods for all

ground conditions

Simultaneous Drill and Grout

Installation

Combines both operations into

a single construction cycle, enabling

high rates of production.

No Casing Required

Can be installed into loose or

collapsing soils without the need for

a temporary casing to support the

borehole.

Rotary Percussive Drilling

Enables quick rates of installation,

good directional stability and assists

in the consolidation of the grout

within the borehole.

Wide Range of Applications

DYWI Drill Hollow Bars

are suitable for:

Soil Nails, Micro Piles, Ground

Anchors for temporary works,

Rock Bolts and Spiles.

Temporary works support, using

Soil Nails

Soil Nails to resist subsidence

Bar / Grout bond

Material Characteristics

Fully Threaded Rod Sections

Continuous thread ensures that ro

can be cut and coupled at any poi

Thread Profile

Standard ISO rope thread (R25-R5

or trapezoidal thread (T76) produc

an excellent bond between the ba

and grout, and enables connection

to conventional drill tooling.

The hollow core serves for flushing

with air or water during drilling, bu

also for grouting the hole.

Choice of drill bits for different

ground conditions

Enhanced corrosion protection is

available upon request

Simultaneous drilling and grouting


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Technical Data

DYWI Drill Hollow Bars for tunnel

portal stabilisation

DYWI DrillHollow Bars for anchors

Bar Size R25N R32N R32S R38N

Nominal Outer Diameter [in] / [mm] 1.00 25 1.26 32.0 1.26 32 1.50 38

Average Inner Diamater [in] / [mm] 0.55 14 0.73 18.5 0.59 15 0.75 19

Average Cross Section Area [in2] / [mm2] 0.45 290 0.67 430.0 0.81 520 1.19 770

Ultimate Load [kips] / [kN] 45 200 63 280 81 360 112 500

Yield Load [kips] / [kN] 34 150 52 230 63 280 90 400

Average Ultimate Tensile Stress [ksi] / [MPa] 100 690 94 650 100 690 94 650

Average Yield Stress [ksi] / [MPa] 75 520 77 530 78 540 75 520

Nominal Weight [lbs/ft] / [kg/m] 1.5 2.3 2.3 3.4 2.8 4.1 4.0 6.1

Maximum Drilling Depths [ft] / [m] 39 12 52 16 65 20 78 24

Bar Size R51L R51N T76N T76S

Nominal Outer Diameter [in] / [mm] 2.00 51 2.00 51 3.00 76 3.00 76

Average Inner Diamater [in] / [mm] 1.42 36 1.30 33 2.06 51 1.77 45

Average Cross Section Area [in2] / [mm2] 1.38 890 1.66 1070 3.29 2120 4.26 2750

Ultimate Load [kips] / [kN] 124 550 180 800 360 1600 427 1900

Yield Load [kips] / [kN] 101 450 142 630 270 1200 337 1500

Average Ultimate Tensile Stress [ksi] / [MPa] 90 620 109 750 108 750 100 690

Average Yield Stress [ksi] / [MPa] 74 510 86 590 83 570 80 550

Nominal Weight [lbs/ft] / [kg/m] 4.7 7.0 5.6 8.4 11.2 16.7 14.8 22.0

Maximum Drilling Depths [ft] / [m] 85 26 98 30 118 36 118 36

NOTE: Maximum allowable test load is 100% of the yield load. Average cross section area is based on average internal diameter of the bar.

The ultimate and yield load capacity are measured values. The ultimate tensile and yield stress are calculated average values. Mill length is

9"-10" (3m). Longer lengths can be special order. Drilling depths are indicative only and subject to ground conditions and drilling methods.

Bar Size Coupler Hex Nut LengthLength Diameter

in mm in mm in mm

R25N 5.91 150 1.5 38 1.61 41

R32N 6.30 160 1.65 42 1.77 45

R32S 6.30 160 1.65 42 1.77 45

R38N 8.66 180 2.01 51 2.36 60

R51L 7.87 200 2.48 63 2.76 70

R51N 7.87 200 2.48 63 2.76 70

T76N 8.66 220 3.82 97 3.15 80

T76S 8.66 220 3.82 97 3.15 80

Coupler and hexnut develop the full load capacity of the bar.Bearing plates are available in any size and can be made from steel material conforming

to ASTM A36 or ASTM A572 grade 50.

DYWI DrillAccessories Properties


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Drill Bits

Hardened Arching-Button Bit with Drop-Center Arching drill bit with drop center button profile

manufactured from hardened cast steel.

Raised blades on outside diameter increase ratesof drilling.

Suitable for fills, gravels and broken ground

Size Diameter Part NumberR32 3 in / 76 mm 32HR8502R38 3.5 in / 90 mm 38HR8502R51 3.5 in / 90 mm 51HR8502T76 4.53 in / 115 mm 76HT8501

5.12 in / 130 mm 76HT8502

Hardened Cross Cut Bit Standard drill bit with hardened cross cut profile,

manufactured from cast steel. for general applications with loose sands

or gravels.

Size Diameter Part NumberR25 1.65 in / 42 mm 25HR8101

2 in / 51 mm 25HR8102R32 2 in / 51 mm 32HR8101

3 in / 76 mm 32HR8102R38 3 in / 76 mm 38HR8101

3.5 in / 90 mm 38HR8102R51 3.5 in / 90 mm 51HR8102

4.53 in / 115 mm 51HR8104

Hardened Two-Stage Cross Cut Bit Drop center cross cut drill bit, manufactured from

hardened cast steel. Drop center increases drilling efficiency. Suitable for coarse soils and fills.

Size Diameter Part NumberT76 5.12 in / 130 mm 76HT8102

7.87 in / 200 mm 76HT8105

Two-Stage Retro-Flush Bit Two stage cross cut drill bit featuring

retro-flush grout holes. Hardened cutting faces for increased wear

resistance. Ideal for mixed fills and clay.

Size Diameter Part NumberR32 3 in / 76 mm 32HR8602R38 5.12 in / 130 mm 38HR8605R51 5.9 in / 150 mm 51HR8606T76 7.87 in / 200 mm 76HT8605

Hardened Flat Face Button Bit Flat face hardened cast steel drill bit

with button profile. Suitable for broken ground and

soft sandstone/limestone.

Size Diameter Part NumberR25 2 in / 51 mm 25HR8202R32 2 in / 51 mm 32HR8201

3 in / 76 mm 32HR8202R38 3 in / 76 mm 38HR8201

4.53 in / 115 mm 38HR8204R51 3 in / 76 mm 51HR8201

4 in / 100 mm 51HR8203

Hardened Drop-Center Button Bit Drop center hardened cast steel drill bit

with button profile. Drop center increases drilling efficiency. Available for larger drill bit diameters. Suitable for broken ground and soft

sandstone/limestone.

Size Diameter Part NumberR38 4.53 in / 115 mm 38HR8204R32 4.53 in / 115 mm 51HR8204

Arching-Button Bit with Carbide Inserts Arching drill bit with drop center button profi Raised face features embeded carbide blade

For dense gravels, weathered andmedium hard rock.

Size Diameter Part NumR32 3 in / 76 mm 32HR851R38 3.5 in / 90 mm 38HR851R51 3.5 in / 90 mm 51HR851T76 4.53 in / 115 mm 76HT851

5.12 in / 130 mm 76HT851

Cross Cut Bit with Carbide Inserts Standard drill bit with featuring cross cut pro

with embedded carbide blades. Suitable for weathered or soft rock with

hard seams.

Size Diameter Part NumR25 1.65 in / 42 mm 25HR811

2 in / 51 mm 25HR811R32 2 in / 51 mm 32HR811

3 in / 76 mm 32HR811R38 3 in / 76 mm 38HR811

3.5 in / 90 mm 38HR811R51 3.5 in / 90 mm 51HR811

4.53 in / 115 mm 51HR811

Two-Stage Cross Cut Bit with Carbide Inser Drop center cross cut drill bitwith embedded

carbide blades in cutting face. Drop center increases drilling efficiency. Suitable for stiff ground, medium dense grav

and weak rock.

Size Diameter Part NumT76 5.12 in / 130 mm 76HT811

7.87 in / 200 mm 76HT811

Flat Face Button Bit with Carbide Inserts Flat face drill bit with embedded carbide but Suitable for stone walls, rubble, broken rock

medium hard rock.

Size Diameter Part NumR25 2 in / 51 mm 25HR821R32 2 in / 51 mm 32HR821

3 in / 76 mm 32HR821R38 3 in / 76 mm 38HR821R51 3 in / 76 mm 51HR821

4 in / 100 mm 51HR821

Drop-Center Button Bit with Carbide Inserts Drop center drill bit with embedded

carbide buttons. Drop center for increased drilling efficiency. Available for larger drill bit diameters. Suitable for stone walls, rubble, broken rock

medium hard rock.

Size Diameter Part NumR38 3 in / 76 mm 38HR821

4.53 in / 115 mm 38HR821

R32 4.53 in / 115 mm 51HR821

Drill bits without carbide inserts Drill bits with carbide inserts


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DYWI Drill Hollow Bar System Installation

DYWI Drill Hollow Bar System is

typically installed using rotary per-

cussive drilling. This technique enables

high rates of installation, good

directional stability and also helps to

consolidate the grout within the

borehole.

Rotation speeds should be sufficient to

cut a true borehole (120-150 RPM for

soil nails; 100-130 RPM for mini piles),

as opposed to displacement of the soil

with the drill bit through percussion and

heavy feed pressures (driven installa-

tion). Drilled boreholes ensure enlarged

grout bodies together with better

permeation of the grout into the

surrounding ground.

Feed pressures on the drill rods shouldbe regulated in accordance with the

cutting performance of the drill bit.

Simultaneous Drilling and Grouting

Suitable for granular soils and fills. This

installation method utilises a Grout

Swivel (see page 12), grout pump and

drilling head (drifter, as shown, top).

The technique combines drilling and

grouting as a single operation, ensuring

that grout is placed over the full length

of the borehole. For ground conditions

where borehole collapse is anticipated

or where subsequent grout injection

down the center of the bar is

problematical, simultaneous drilling and

grouting is the preferred solution.

Grouting pressures should be regulated

to maintain circulation at all times(typically up to 100 psi), with a small

amount of grout return visible at the

mouth of the borehole. Pressures in

excess of 100 psi are generally only

required for special applications

(i.e. anchors in cohesive soils or mining

applications).

The choice of grout pump varies

between applications, but basic

requirements are as follows:

a) thorough mixing of the grout

to avoid blockages at the drill bit

b) delivery of a continuous volume

to ensure consistent grouting

c) maintenance of sufficient pressure

Installation of DYWI Drill Rock BoltsRotary percussive drilling head

(drifter) with rotary injection adaptor

for grout injection

Lightweight rotary percussive

drilling rig (for restricted access)


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Soil Nails

DYWI Drill Hollow Bar soil nails

provide an in-situ reinforcement for the

stabilisation of slopes. Typical

applications include railway embank-

ments and road widening projects. The

DYWI Drill Hollow Bar System offers

high rates of production when installed

using the simultaneous drill and grout

method.

For permanent soil nailing applications,

galvanizing or epoxy coating the soil

nail provides a practical means of

extending the life of the nail.

Face details consist of a bearing plate

with beveled washers when required forangle compensation. For confinement

of the face between the bearing plates,

a shotcrete or reinforced geogrid will

provide the necessary restraint.

Soil nails securing a reinforced

geomat, for erosion control

Soil nails with a galvanized top

section, for road widening

Galvanized end hardware

Shelf to prevent haunching

of geogrid

Simultaneous drill and grout

installation

Railway embankment stabilisation

with Soil Nails


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Micro Piles

DYWI Drill Injection Piles consist of a

micro pile (or mini pile) bar that can be

both drilled and injected with grout

during installation. The fully threaded

rod sections can be cut and coupled at

any point, enabling quick and easyinstallation in areas of restricted access

or limited headroom.

Installation throughan existing slab

Underpinning of

augered columns

Fully groutedmicro pile

Refurbishment of existing column

bases

Upgrading of existing foundations

Installation of

DYWI Drill

Injection Piles

Installation of DYWI Drill Injection Piles

causes minimal disturbance to

surrounding structures.The system also

enables additional rod sections to be

added in-situ, for pile extension in poor

ground where the depth of the bearing

strata is unknown. Simultaneous drilling

and grouting ensures that the grout is

continuously placed over the full depth

of the micro pile, enabling grout to

permeate the surrounding ground and

increase skin friction. Rotary percussive

installation ensures high rates of

production and provides good

directional stability if obstructions are

encountered.

Applications for DYWI Drill Injection

Piles include but are not limited to:

column bases, foundation upgrades,

mast stabilisation, refurbishment of old

structures, and gantry bases for

overhead power lines on electric

rail projects.


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DYWI Drill Injection Anchors provide

an effective temporary anchor that can

be readily installed into loose or col-

lapsing ground without the need for a

casing. Rotary percussive drilling, com-

bined with simultaneous grouting,

ensures that the grout penetrates the

surrounding ground to provide anincreased level of bond.

All ground anchors should incorporate

a fixed length (bonded in the stable

zone) and a free length (debonded with

a sleeve, in the wedge zone) to enable

the anchor to be prestressed. The

prestress provides an active restraint,

enabling the anchor to resist service

loadings without additional elongation.

DYWI Drill Hollow Bar Systems

(irrespective of threadform) are only

suitable as temporary anchors. Rotary

installed bars cannot provide the level

of corrosion protection necessary for

permanent anchors working in tension

as outlined in current anchor standards.

For permanent anchors refer to DSI

Rock and Soil Anchor brochure.

Temporary Ground Anchors

Temporary anchors for tie-backs of

a contiguous pile wall

Anchoring of alternate sheet piles

no waler required

DYWI DrillAnchors for sheet pile

tie backs

Anchor installat ion prior to

basement excavation


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Rock Bolts & Spiles

Rock bolts are passive ties; typically

classified as lightly loaded, short instal-

lations. DYWI Drill Hollow Bar System

provides a practical rock bolt that is

quick and easy to install through fractu-

red or broken ground. The system is

available with a range of harder drill bits

(Tungsten Carbide: button or chisel) forefficient drilling in stronger material.

Spiles provide a protective canopy, to

enable the heading of a tunnel to be

advanced without the risk of falling

debris. Often used with NATM

New Austrian Tunneling Method

construction.

DYWI Drill Hollow Bar System Spilesenable drilled installation, reducing

localised disruption and providing a

conduit for grouting. Subsequent

grouting assists in the consolidation of

the surrounding ground.

DYWI Drill Hollow Bar Rock Bolts

Tunnel portal stabilization

Spiles for support of tunnel crown

Air or water flush percussive drilling is

normally employed for installation,

followed by subsequent grout injection

through the bore of the bar. Injected

grout provides the bond for the

DYWI Drill Hollow Bar and also helps

to consolidate fractured ground.

For mining applications, the DYWI Drill

Hollow Bar System is used as self-

drilling rock bolts in areas of high stress

at pillars, crossheads or abutments.

Other applications include the use of

the self-drilling bar as an injection

conduit for resin, grout or waterproofing

agents.

DYWI Drill Hollow Bar Spiles


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DYWI Drill Hollow Bar System Installation Accessories

Grout Swivels

Grout Swivels are used for simul-

taneous drill and grout installation, to

inject grout into the bore of a rotating

DYWI Drill Hollow Bar. The unit

comprises of a heat treated shaft (to

withstand the impact energy from the

hammer drive) and a housing into

which the grout is pumped. Inlet ports

within the shaft, enable grout to be

pumped into the bore of the bar.

A bracket is required (attached to the

drifter) to prevent the housing from

rotating with the shaft, as well as

positioning it at the correct location toenable unrestricted operation of the

hammer.

Drill Tooling

A range of drill accessories are

available, to enable connection

between the output drive of the

drilling head and the different

DYWI Drill Bar diameters.

Grout Swivel (rig installation)

Simultaneous drill and grout

installation

Grout Swivel fitted below drill hea

Grout Injection

Coupler

(for subsequent

grouting)

Balance Rod Reducing

Coupler

Reducing Coup

(with centre brid

Grout Swivel (hand held installation

Air Flush Shank (hand held

installation)


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Stressing and Testing

Soil Nail Testing

Soil nail testing is used to establish the

bond stress within the stable zone of a

slope. Load generated in the wedge(retained) zone is usually discounted as

it does not contribute to the underlying

stability of the nailed slope.

As DYWI Drill Hollow Bar System soil

nails are typically fully grouted

(therefore fully bonded), it is necessary

to either; wash back the grout in the

wedge zone with a lance, or establish

the influence of the wedge zone bond

on the final load, in order that an

accurate assessment of the load in the

stable zone can be made.

Nail load is measured through a

pressure gauge incorporated in the jack

circuit, with extension recorded by a

dial gauge mounted independently.

Bearing surfaces, for the jack platform,

should be perpendicular to the angle of

installation and have sufficient bearing

area to resist settlement as the nail is

tested. An alignment load in the jack

will ensure correct orientation of the soil

nail prior to measuring its elongation.

Micro Pile Testing

A range of tests are used to establish

the settlement characteristics of micro

piles. Compression testing generallyfalls into two categories, static or

dynamic.

Static testing employs anchor piles or

temporary bearing yoke to provide the

reaction against which the micropile is

loaded; displacement can then

measured against load.

Tensile pile testing involves loading the

micropile with a jack, from a bearing

platform that spans outside the cone of

influence. Load is measured through

the jack, with extension recorded from

an independent reference point.

Temporary Ground Anchor Testing

Proof testing is employed to demon-

strate the anchor performance, prior to

excavation at the front of the face. For

temporary anchors the proof load is

generally 133 % to 150 % of the

working load. Following proof loading,

anchors are locked-off at working load

to provide an active restraint to the

structure.

Testing of DYWIDAG Soil Nail

Tensile test on a

temporary anchor pile

DYWI DrillAnchor testing

Testing of DYWI Drill

Hollow Bars forslope stabilization


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Shoring for reconstruction of Little Mountain Reservoir using DYWI Drill Hollow BarsLittle Mountain Reservoir, GVRD (Greater Vancouver Regional District), Vancouver, BC, Canada

References

Shoring works with DYWI Drill

Self-Drilling Hollow Bar Soil Nails

Owner GVRD (Greater Vancouver Regional District), Vancouver, BC, Canada +++ Engineer Sandwell Engineering, Vancouver, BC, Canada

+++ Geotechnical Engineer Golder Associates Ltd., Vancouver, BC, Canada +++ General Contractor Graham Industrial Services Ltd.,

Vancouver, BC, Canada +++ Shoring Contractor Southwest Contracting Ltd., Vancouver, BC, Canada

DSI Services Supply of DYWI Drill Hollow Bars with 3 and 4 m length: 4,500 m R32N, 4,400 m R32S and 1,500 m R38;

Technical assistance

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Use of DYWI Drill Hollow Bars to upgrade Centennial Bridge foundationFairchild Creek Viaduct, Brantford, Ontario, Canada

Client Canadian National Railway, Gormley, ON, Canada +++ General Contractor Geo-Foundations Contractors Inc., Bolton, ON, Canada

+++ Consulting Alston Associates, Markham, ON, Canada

DSI Services Supply of metallized DYWI Drill Hollow Bars type R32N and components for bridge foundation remediation scheme

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Drilling works at pier footings

Slope stabilization with 15 m long DYWI Drill

Self-Drilling Hollow Bar Soil Nails


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Owner Brantford General Hospital, Brantford, Ontario, Canada +++ General Contractor Bondfield Construction, Concord, Ontario, Canada

+++ Consulting Engineers Carruthers & Wallace Limited, Toronto, Ontario, Canada +++ Contractor for foundations HC Matcon Inc., Ayr,

Ontario, Canada +++ Engineer for foundations Isherwood Associates Ltd., Mississauga, Ontario, Canada

Services Supply of 40,000 ft DYWI Drill Hollow Bar Soil Nails for the shotcrete wall

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Shotcrete wall with

DYWI Drill Hollow Bars

Brantford General Hospital, Brantford, Ontario, Canada

References

Electra1,020m DYWI Drill Hollow Bar Anchors secure the old SDGE Station in San Diego

Owner Bosa Development California II, Inc, British Columbia, Canada +++ Contractor Bosa Development California II, Inc,

British Columbia, Canada +++ Subcontractor Condon-Johnson & Assoc. Inc., San Diego, CA, USA

DSI Services Supply of approximately 10,000 ft. T76S DYWI Drill Bars with accessories such as couplers, nuts and bits

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www.dsiamerica.com

DYWIDAG-Systems

International USA Inc.

320 Marmon DriveBolingbrook, IL 60440

Phone (630) 739-1100Fax (630) 739-5517E-Mail: [email protected]

1263 Newark RoadToughkenamon, PA 19374


1305 S. Central AveUnit H

Kent, WA 98032Phone (253) 859-9995Fax (253) 859-9119E-Mail: [email protected]

2154 South StreetLong Beach, CA 90805


4732 Stone DriveTucker, GA 30084

Phone (770) 491-3790

Fax (770) 938-1219E-Mail: [email protected]

1801 N. Peyco DriveArl ington, TX 76001-6704


525 Wanaque AvenueSuite LL1

Pompton Lakes, NJ 07442Phone (973) 831-6560Fax (973) 831-6503

E-Mail: [email protected]

19 Ann Road

Long Valley, NJ 07853Phone (908) 850-3532Fax (908) 850-8661

E-Mail: [email protected]

DYWIDAG-Systems

International Canada Ltd.

Eastern Division37 Cardico Drive

Gormley, ON L0H1G0CanadaPhone (905) 888-8988

Fax (905) 888-8987E-mail: [email protected]

Quebec OfficeSt. Bruno

Quebec, ON, J3V 6E2CanadaPhone (450) 653-0935


Western DivisionSuite 10319433 96thAv.

Surrey, BC V4N4C4CanadaPhone (604) 888-8818


Calgary Office#204, 2816 - 21 Street N.E.

Calgary, Alberta T2E 6Z2CanadaPhone (403) 291-4414


DSI-USA DYWI Drill Hollow Bar System En

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