WELCOME –Insitu Stabilization of soils with High

Density resins under and existing culvert

URETEK ICR Mid – AtlanticAPWA-NC Hickory 2015

Joe Church, PE

jchurch@uretekma.com

803.509.4439

GEOTECHICAL CONTRACTOR

• 4 PE’s on staff

• Over 7 crews doing work on

different projects on any given

day

• 2 crews dedicated to HDPR

• Over 40 people servicing clients

every day!

SERVICES• HIGH DENSITY POLYURETHANE GROUTING

• MECHANICAL EARTH ANCHORING SYSTEMS

• LIGHT WEIGHT ENGINEERED FILLS

• MICROPILES

• SOIL NAIL WALLS

• HELICAL PIERS

• SHOTCRETE

High Density Polyurethane Resin Applications:

• Sinking Manholes

• Leaking Pipes

• Uneven Sidewalks/Curb/Gutter

• Sinkholes

• Sinking Foundations

• Sinking Parking Lots

Manholes

and Pipes

Manholes and Pipes

Stormwater

PORTS

Industrial

Warehouses

Rail

Roads

Residential

URETEK HDPF History1975 – URETEK Finland develops

high-density polymers

1979 – The URETEK MethodTM

patented

1988 – URETEK USA, Inc. granted exclusive

rights to United States and Mexico

2000 – ICR Dealer Network Set Up

2003 – Deep Injection ProcessTM

patented

Introduction to

Expanding Polyurethane

Three Broad Categories

Hydrophilic, Hydrophobic and

Hydroinsensitive (URETEK 486 Star)

Two Component Polymerization Process

Injected as a liquid, chemical reaction

expands and changes the liquid into

a solid

Advantages to Using

URETEK Polymers Minimal Disruption

No Digging / 5/8” diameter holes

Develops 90% strength in 15 minutes

Fully cured in 24 hours

Return to service in 1 hour

Excellent Chemical Resistance

Longterm Structural and Dimensional

Stability

10 year material warranty

Environmentally Benign

The introduction to the

West Knox Street Project Insitu Stabilization of soils with High Density resins under and existing culvert

1) Designation of the problem and identifying the most

cost effective repair

2) Design of the repair, based on the environment and the

degraded condition of the culvert

3) Planning, and protecting the environment, Home and

population in a historic district

4) Implementation of the repair

5) Effects on the environment

6) Clean Up and restoration of the site

Step # 1 - Designation of the

problem and identifying the most

cost effective repair

NCDOT Inspection report

found a 2.5’ Void found

under the culvert!!!

Step # 1 - Designation of the problem and identifying the most

cost effective repair

Sink Holes on Street level

2.5’ Void under culvert

Step # 1 - Designation of the

problem and identifying the most

cost effective repair

NCDOT Inspection report

also showed failures in

the aging concrete of the

culvert

Step # 2 - Design of the repair, based

on the environment and the

degraded condition of the culvert

Uretek Completed DCP test

on the site to help determine

the extent of the soil

problems under the culvert

Weight of Hammer Soils

Step # 2 - Design of the repair, based on the environment and the

degraded condition of the culvert

Existing culvert

building the 40’s-50’s

24” to 30” void

under culvert

W.O.H. Soils under

culvert

Step # 2 - Design of the repair, based on the environment and the

degraded condition of the culvert

Step # 3 - Planning, and protecting the environment, Home and

population in a historic district

Culvert Site:

West Knox St.

Durham, NC

(20’) wide road with

existing neighborhood

and pedestrian walkway

Step # 4 - Implementation of the repair

Installation of sheet Pile wall

Installation of temporary

coffer dam

Step # 4 - Implementation of the repair

URETEK Patented

Deep InjectionTM

Step # 4 - Implementation of the repair

URETEK Patented

Deep InjectionTM

Rehabilitation DiagramURETEK Patented

Deep Injections

Laser levels are used to monitor

so that no unwanted movement

occurs

Step # 4 - Implementation of the repair

Before

After

Before

Step # 4 - Implementation of the repair

Epoxy Crack Injection

Step # 4 - Implementation of the repair

Joint Sealant flexible joint

Finished Permanent coffer

dam, up steam and down

stream of the culvert

Step # 5 - Effects on the environment

Uretek 486 is NSF 61

certified and has minimal

impact on any environment,

Uretek returned the site to its

original condition

Step # 6 - Clean Up and restoration of the site

What was the Cost?- The estimated cost to rip out the existing

culvert and replace it was approximately

$3,000,000.00 Dollars! This will have closed

the road for 8 to 10 weeks and disrupted all of

the local residence.

-Uretek completed this repair, including the

sheet pile coffer dam, epoxy crack inject and

stabilization of the soils under the culvert for a

cost of less then $500,000.00. we never closed

the walking trails or the road above. This work

was completed in less then 30 days!

Less than 30 days, from start to finish

Thank you from Uretek to the

APWA-NC Stormwater

Management Conference

Chris GibbyNorth Carolina

(336) 755-4982

Email: cgibby@uretekma.com

www.uretekma.com

Thank you.

Joe Church, PESouth Carolina

(803) 318-2225

jchurch@uretekma.com

www.uretekma.com

Innovation in Geotechnical Contracting