ENGINEERED RETAINING WALLS - cdn.lurveys.com · IT’S NOT JUST ABOUT THE WALL A great Engineered...

ENGINEERED RETAINING WALLS

IT’S NOT JUST ABOUT THE WALL


A great Engineered SRW should provide a beautiful aesthetic that blends subtly with the environment & surrounding architecture Instead of Overpowering It


| Risi Stone is the original pioneer of the SRW (Segmental Retaining Wall)

| Optimal choice of Engineers, Designers & Landscape Architects

| Longest proven track record of durability & structural stability (over 25 years)

OUR DESIGN SIMPLICITY GUARANTEES PERFORMANCE

Risi Stone Engineered walls are designed to ensure critical Structural Properties will always be there:

| Block Unit Weight

| Shear Strength

| Block/Grid Connection Strength

| Wall Alignment



Risi Stone Solid Block With Tongue & Groove

Hollow Core Block Representation of improper installation

THE SOLID CHOICE

THE SOLID CHOICE

Integral Tongue with Split-Key

Perfect Height Tolerance

Solid Body Guarantees Unit Weight & maximum

Shear Strength

Integrated Hand-hold

Superior Geogrid Connection

Integral Offset Groove for Auto-Alignment Example: Pisa2 retaining wall system

SOLID ADVANTAGES

Solid Blocks

Provide greater durability

| Excellent freeze/thaw durability

| More resistant to breakage & minor damage

Solid Blocks

No hollow cores to fill with gravel & compact

| Ensures maximum weight of each block is present

| Maximum resistance to overturning

| Reduced installation time & labour costs

SOLID ADVANTAGES

Modular System

Wall is flexible, while still retains its structural integrity

| Absorbs movement & settlement

| Requires minimal embedment

SOLID ADVANTAGES

Modular System

Array of complementing special blocks

| Easy to create site-specific features

| Coping can be selected for various wall arrangements

| Pre-fabricated corner blocks intensify corner strength & appearance, while speeding construction

SOLID ADVANTAGES

Interlocking Tongue & Groove

Interlocking mechanism is molded directly into the block

| Easy, quick installation

| No separate pins, clips or connectors to install

SOLID ADVANTAGES


Maximum shear strength

| Shear strength is maintained along the entire length of block

| Allows for superior geogrid connection

SOLID ADVANTAGES


Automatic alignment & self-battering

| Once the first course is installed flat and level, successive blocks stack quickly & easily

| Blocks are dry-stacked

| Lower cost — No mortar requirements

| Minimal training is required to achieve excellent results

SOLID ADVANTAGES


Continuous interlock achieved throughout the wall

| Creates a stronger, more damage-resistant structure

SOLID ADVANTAGES

Combined with Geogrid Reinforcement

Higher walls can be achieved

| Able to use the same facia throughout the project on lower & higher walls (ie. Mix gravity & geogrid reinforced wall as site conditions dictate)

SOLID ADVANTAGES

Risi Stone Solid blocks deliver benefits to all stakeholders

| Provides Engineers with the assurance of guaranteed structural properties

| Contractors appreciate saving time & the ability to modify blocks on site

| Long term performance & nearly double compressive strength of competitors is important to Owners

THE SOLID CHOICE

WE’RE BIG BUT STILL VERSATILE

WE’RE BIG BUT STILL VERSATILE

| Risi Stone was the first to envision the potential of a “Large Block” SRW

| Benefits of machine-placed walls include added strength, stability & durability

| Comprehensive Design Flexibility & usage efficiency

| All products are dimensioned for max versatility

HEIGHTENED ECONOMICS


| Designed to optimally address grading issues

| Blocks range in depth from 250mm (9.8”) to 1830mm (72”)

| Change from a Gravity Wall to a Reinforced Wall without altering final appearance


Single Depth Gravity

Vertical

Up to 1.5m / 5.0’

Battered

Up to 1.8m / 6.0’


Multi Depth Gravity

Vertical

Up to 2.8m / 9.0’

Battered

Up to 3.0m / 10.0’


Geogrid Reinforced

Vertical

Over +12.0m / +39.0’

Battered

Over +12.0m / +39.0’


DuraHold Crib

Crib

Up to 5.5m / 18.0’

SERIOUSLY FAST INSTALLATION

SERIOUSLY FAST INSTALLATION

| Increased productivity, decreased labour costs

| Consistent installation rate (no labour fatigue)

Patented “Triple Clamp”

| Install 3 Blocks / 7.25 Sq.ft. per cycle

| Typical installation rate 1000-2000 Sq.ft per day

SIENASTONE

| Able to create versatile design details (steps/handrails,etc)

| Erected utilizing light construction equipment

| Single depth (333 or 500 units), Multi depth (925 units) or Geogrid reinforced

| Easy change from gravity wall to reinforced wall at any point without altering the overall appearance

SIENASTONE

Block Types

Standard 500 (570 lbs) 333 925

90° Corner 45° Corner Coping Corner Coping

SIENASTONE

Max. Height* Gravity Wall 333 N / A 500 1.5m / 4.8' 925 2.8m / 9.0'

Max. Height Geogrid Reinforced 333 +9m / +30' 500 +9m / +30' 925 N / A

Min. Curve Radius Inside & Outside 333 73m / 240' 500 73m / 240' 925 N / A

Stack Alignment Vertical / Battered Handrail Coredrill Min. Depth 650mm / 25.5"

Applications

*Values may vary based on site conditions. Higher wall up to 4.0m/13' may be achieved by combining block types.

SONOMASTONE

| The ultimate combination of design aesthetics, economics & efficiency

| Corniced smooth-faced coping unit accentuates the rough texture of the wall for an elegant appearance

| Seamlessly incorporate tight curves (4.25m/14” radius)

| Single depth (375 units), Multi depth (750 units) or Geogrid Reinforced

SONOMASTONE

Block Types

750

Coping Coping Tapered Corner

Standard 375 (385 lbs) Tapered

SONOMASTONE

Max. Height* Gravity Wall 375 1.5m / 4.8' 750 2.8m / 9.0'

Max. Height Geogrid Reinforced 375 +9m / +30' 750 N / A

Min. Curve Radius Inside & Outside Taper (3.5/4.3m)/(11.5'/14')

375 73m / 240' 750 N / A

Stack Alignment Vertical / Battered Handrail Coredrill Min. Depth 650mm / 25.5"

Applications

*Values may vary based on site conditions. Higher wall up to 4.0m/13' may be achieved by combining block types.

DURAHOLD

| Immense block, ideal for demanding & complex projects

| Smooth texture = reduce water (flow) friction

| Perfect for water applications (lakes, rivers, detention ponds & canals)

| Single depth Conventional, Geogrid Reinforced & Crib

DURAHOLD

Block Types

45° Corner Coping 90° Corner

Tie Back

Half Coping

Half Tapered Standard (1745 lbs)

DURAHOLD

Max. Height* Gravity Wall Std 2m / 6' Crib 5.5m / 18'

Max. Height Geogrid Reinforced Std +9m / +30' Crib +9m / +30'

Min. Curve Radius Inside & Outside Std 82m / 269' Taper 20m / 66'

Stack Alignment** Vertical / Battered Handrail Coredrill Min. Depth 460mm / 18"

Applications

*Values may vary based on site conditions

**Half Tapered blocks cannot be constructed vertical when used in a curve

DURAHOLD2

| Identical in final appearance to DuraHold

| Reduced block depth makes it an economical solution for lower walls and less demanding applications

| Utilize on a project in conjuction with Durahold for cost savings while maintaining visual flow

| Straight Gravity walls, Geogrid Reinforced & Crib

DURAHOLD2

Block Types

Coping

90° Corner

Tie Back Standard (982 lbs)

DURAHOLD2

Max. Height* Gravity Wall Std 1m / 3' Crib 5.5m / 18'

Max. Height Geogrid Reinforced Std +7m / +23' Crib +7m / +23'

Min. Curve Radius Inside & Outside Std 82m / 269'

Stack Alignment Battered Handrail Positioned in Sonotube behind wall

Applications


VERSATILITY WELL-HANDLED

VERSATILITY WELL-HANDLED

| Risi Stone hand-placed block SRW’s include Pisa2, RomanPisa and Rivercrest

| Allow for tight curves, meandering contours & intricate details

| Can enable wall heights of over 6m (18’) when combined with geogrid

| Ideal for versatile design projects such as retaining or garden walls, seat walls, pillars & steps

RIVERCREST

| Natural, versatile & easy-to-use, awarding winning landscape wall system

| Over 150 distinct real stone textures achieve a natural, random appearance – no installation patterns to follow

| The engineered S-Shape design automatically creates vertical & lateral interlock for added strength

| Ideal for curved or straight retaining, garden & seat walls, pillars, planters and tree-rings

RIVERCREST

Block Types

Standard No. 1, 2, 3 & 4

Jumper No. 1, 2, 3 & 4

Long Corner Jumper Corner Coping Short Corner

RIVERCREST

Max. Height* Gravity Wall All 0.6m / 2.0'

Max. Height Geogrid Reinforced All 1.8m / 6.0'

Min. Curve Radius Inside & Outside No.1 0.9m / 2.9' No.1&3 1m / 3.4' All 1.4m / 4.5'

Stack Alignment Vertical Handrail Positioned in Sonotube behind wall

Applications


PISA2

| The original SRW that started it all over 25 years ago

| Versatile, structurally stable & simplistic installation combined with contactor friendly design features

| Ideal for curved or straight walls, steps, planter & pillars

| Easily create elegant contrasting bands of color/texture with the Pisa2 banding unit

PISA2

Block Types

Banding Coping

Corner

Half Coping

Standard Tapered

PISA2


Max. Height Geogrid Reinforced All +7.0m / +23.0'

Min. Curve Radius Inside & Outside Taper 2.4m / 8.0' Extra1 1.5m / 5.0'

Stack Alignment Vertical / Battered Handrail Positioned in Sonotube behind wall

Applications

*Values may vary based on site conditions 1Extra Taper blocks available in some regions

ROMANPISA

| Specialized process gives a worn cobble appearance

| Same excellent design flexibility as Pisa2 & can be combined or substituted with any Pisa2 application

| Ideal for curved or straight walls, steps, planter & pillars

| Easily create elegant contrasting bands of color/texture with the Pisa2 banding unit

ROMANPISA

Block Types

Standard Tapered Jumbo

Banding Coping Half Coping

Half

Corner

ROMANPISA


Max. Height Geogrid Reinforced All +7.0m / +23.0'

Min. Curve Radius Inside & Outside Taper 2.4m / 8.0' Extra1 1.5m / 5.0'

Stack Alignment Vertical / Battered Handrail Positioned in Sonotube behind wall

Applications

*Values may vary based on site conditions 1Extra Taper blocks available in some regions

THIS IS THE CORE OF WHAT WE DO

THIS IS THE CORE OF WHAT WE DO

| Segmental retaining walls are the primary focus of Risi Stone and Unilock.

| Precise, consistent & reliable manufacturing quality

| Ready & in-stock - No delays in the supply chain

MADE FOR LASTING DURABILITY

| Blocks are manufactured on the same high capacity machines as paving stones

| Unparalleled compressive strength & dimensional accuracy

| All products are manufactured to over 5000 psi (35MPa)

| Higher compressive strength offers superior freeze thaw durability & performance

DOT APPROVED

DOT APPROVED

| A Wide range of Department of Transportation evaluated & approved wall systems

| Minimum 28-day compressive strength of 35 MPa (5000 psi)

| Maximum moisture absorption rate of 5% ensuring adequate freeze/thaw durability

EVERLASTING BEAUTY INSIDE & OUT

| Durable “Split-Rock” texture is very forgiving if accidents happen

| Ideal for use along municipal roadways & parking areas

| Appearance isn’t noticeably affected by minor bumps or vehicle impact

| Structural integrity of the block is never compromised

KEEP A FEW THINGS IN MIND WHEN DESIGNING

SELECTING THE RIGHT PRODUCT

| Overall aesthetics

| Block size & available site access

| Structural requirements – Gravity/Geogrid reinforced handrails, property lines, etc

| Geometry – Are there tight curves?

HOW HIGH & WHAT ARE THE SPACE REQUIRMENTS

Gravity Walls

Rule of Thumb

Max Height = 3 x Block Depth

x

3x


Geogrid Walls

Rule of Thumb

Depth of Geogrid

70% of wall height =

Remember Excavation | Cannot encroach property line

0.7 x H

H

PR

OP

ERTY

LIN

E


| Large Gravity walls maybe the answer to tight property lines

PR

OP

ER

TY

LIN

E

PR

OP

ER

TY

LIN

E

WHAT ABOUT DRAINAGE

Majority of wall failures are a direct result of improper drainage

Through Wall Face To Catch Basin/Drain

WHAT ABOUT DRAINAGE

Internal Drainage

| To remove hydrostatic pressures from behind the wall

WHAT ABOUT DRAINAGE

External Drainage

| Swales above & below the wall are an effective, low-cost drainage method to divert water away from the wall

Clay Swale Concrete Swale

HANDRAILS, FENCES & SAFETY

Most Building Codes typically require handrails for wall over 0.6m (2’) for safety pruposes

Large Block Walls

| Core drill directly into the block

Small Block Walls

| Place in Sonotube behind the wall

Wood privacy fences must be accounted for in the design – not after the fact

| Normally, must be placed behind the wall

| The foundation must be place during construction

HANDRAILS, FENCES & SAFETY

LARGE TREES & PLANTS

| No way to quantify the effect of trees on the wall – wind loading

| Placement of grid & trees must be planned ahead of time

| Tree must be staked until root structure develops to stabilize itself

| Tree should be kept out of the reinforced zone if possible

WHAT ABOUT OTHER STRUCTURES & UTILITES

| Catch basins

| Underground services

| Behind wall

| Below or in front of wall

Keep other structures & utilities out of the reinforced zone

Underground Service

Underground Service

Catch Basin

CASE STUDY: WEST LONDON DYKE REVETMENT

Product: DuraHold

Manufacturer: Unilock Ltd.

Location: London, Ontario

Designer: Risi Stone Systems

Civil Engineer: Stantec Consulting Eng.

Contractor: Ro-Buck Contracting Ltd.


Proposed wall replaced approximately 300m of the existing dyke along the Thames River in this phase.


Access to the site was limited & all construction had to be completed from the high side to prevent contamination of the Thames River.


Coordination of the excavation, block placement, and infill material was crucial due to the limited space.


A fall arrest system with

anchor wires secured to

large blocks was utilized due

to the height of the wall. The

workers then harnessed

themselves to the anchor

wire, allowing enough range

of movement required to

construct the wall.


A reinforced toe wall that was constructed in the 1980s to stabilize the original dyke was used as erosion protection. It was cut to fit the new layout and riprap was placed between it and the DuraHold Wall.


To allow for the water to exit the infill zone as quickly as possible following a flood event, the wall was backfilled with a 10mm gap-graded drainage layer.


Drainage tiles were installed at grade, for the 2 year and the 75 year flood events. The drainage tiles outlet through the face at 15m intervals.


The south end of the wall was terraced to allow for a future pathway to extend under the Queens Ave. bridge.


The pathway along the Thames River was incorporated into the new layout along the top of the wall.

SOLID WALL WITH SOLID SUPPORT

SOLID WALL WITH SOLID SUPPORT

| Expert Engineers with over 50 year combined SRW design experience

| Accurate reports & final design submission drawings

| A smooth & collaborative design process without the headaches

INDUSTRY LEADING DESIGN SOFTWARE

| Import grading & layout info direct from CAD

| Run Static, Seismic, & ICS Analysis in accordance to NCMA or AASHTO (LRFD)

| Generate quantity estimates & project specific Reports

| Visit www.risistone.com to learn more

Risi Stone Edition

http://www.risistone.com/

INDUSTRY LEADING DESIGN SOFTWARE

| Accurately displays the True footprint of the wall

| Create Elevation Views & Quantity Estimates

| Export Wall Data directly to Vespa.RS

AWall Representation “Typical” Representation

AutoCAD Tool

Thank You

www.risistone.com 1.800.626.WALL

www.unilock.com 1.800.UNILOCK

ENGINEERED RETAINING WALLS - cdn.lurveys.com · IT’S NOT JUST ABOUT THE WALL A great Engineered...

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