Southern California Drainage Channel Repair

Riverside College Drainage Channel Repair

Drainage Channel Repair included Lifting and Leveling of structure and joint sealing against water intrusion

In the southwestern United States, Drainage channels are an important infrastructure tool for ensuring heavy rain events do not cause flash floods and subsequent property damage.  Maintaining these systems is essential to make sure that communities are protected and public works systems, such as roadways, are not interrupted due to washout or pooling water. Riverside City College, located in Riverside, CA, was experiencing problems with a portion of its drainage channel and contacted EagleLIFT to perform the drainage channel repair.

Riverside Drainage Channel Repair

Riverside City College (RCC) had approximately 450 linear feet of its drainage channel that had become undermined by water that was traveling underneath the concrete panels.  The water began to washout the base support soils of the channel, causing voids and settlement along the channel’s bottom and sidewalls.  The College was seeking a cost-effective solution to extend the life of the drainage structure and to avoid the cost of rip and replace.

EagleLIFT recommended and was contracted to inject an expanding polyurethane underneath the drainage channel to stabilize the panels, fill the voids, and seal the joints to restore the water flow over the channel.  The injection approach is a process whereby an industrial grade, high-density polyurethane is injected through 5/8” holes directly into the weak soil zones to stabilize, compact and densify the area.  Once injected, the polymer initially moves throughout the injection point in liquid form, aggressively seeking voids and the path of least resistance, and then it begins to expand throughout the soil media and densify the soil.

Southern California Drainage Channel Repair
EagleLIFT utilized a 4ft injection pattern along the bottom of the drainage structure and half way up the sidewalls.  The pattern design was intended to provide consistent void fill and to adjoin the material to provide effective undersealing of the concrete panels.  Since our polymers are hydrophobic, the material would push out any sitting water and protect the panels against future water intrusion.

EagleLIFT worked as subcontractor under Three Peaks Construction, who was contracted to install an epoxy overlay over certain areas of the channel after the voids were filled. EagleLIFT coordinated all activities with Three Peaks Construction and RCC maintenance staff to ensure work did not interfere with College operations.

Results

All voids under the areas of concern were filled with material usage coming in at 25% under budget.  RCC was able to use the cost savings for additional repair projects that they did not anticipate having the funding to complete.  The project was also completed without any interruption to RCC’s operations.

Culvert Soil Stabilization

Culvert Soil Stabilization Repair at Vandenberg AFB

EagleLIFT Completes Culvert Soil Stabilization Repair at Vandenberg AFB, Saving $1.5B Mission

Culvert Soil StabilizationIn the construction industry, deadlines are a way of life. Whether you are meeting proposal deadlines, managing costs, minimizing weather delays, meeting contract requirements, etc., the clock seems to always be ticking and pressure is continually mounting. However, recently EagleLIFT performed a culvert soil stabilization and slope repair project at Vandenberg AFB that, if not met, the deadlines would be a costly scenario.

Vandenberg AFB is a Department of Defense space and missile testing base located near Lompoc, California. Vandenberg launches a variety of critical rocket missions for military purposes and also leases launchpad facilities to SpaceX. As you can imagine, its activities are high-profile, high-budget, and highly sensitive to delays.

During the 2016-2017 rainy season, Vandenberg experienced extensive storm runoff that damaged an 84 inch, 200ft long corrugated metal drainage culvert, causing collapse at three separate locations and further degraded the culvert’s corroded bottom. The damage to the culvert caused severe inflow and infiltration (I/I) which destabilized an adjacent slope along the main supply road leading to Space Launch Complex 6 (SLC-6).

When an approximate 30ft deep sinkhole opened up by the supply road, a bypass road had to be installed in order to continue launch operations until a permanent fix was designed for the culvert. When concern began to grow that a 20ft high section of the adjacent slope would slip and the sinkhole wound endanger the new bypass road and delay an upcoming $1.5 billion mission, Vandenberg sought for a temporary fix to strengthen the culvert, slope and avert disastrous and costly delays.

When Vandenberg began designing a repair, the solution was to address 1.) culvert soil stabilization and restoring usable capacity, 2.) ensuring the slope would not slip, and 3.) not impact the environmentally sensitive habitat on the slope.

For the culvert soil stabilization, the AFB determined that chemical grout would be used to stabilize collapsed sections from degrading further into the culvert. The entire culvert was to be stabilized to prevent further soil migration and seal it against further I/I, and the corroded bottom of the CMP would be restored using a flowable fill.

For the slope, a “wedge” injection pattern was designed to provide structural stability at the bottom of the slope and lateral stability to prevent slippage that would cause structural damage to the culvert and irreparable damage to the sensitive environment the slope supports.

“Initially, Vandenberg’s solution for the slope repair consisted of using a compaction grout to provide a dense material for slope stability,” stated Cliff Frazao, Chief Operations Officer of EagleLIFT. “When we were approached for the project we had concern that the compaction grouting footprint could be detrimental to the environmental mission of the project and add too much weight to the area and cause further issues with the culvert.”

Based on these concerns, the slope “wedge” injections were rescoped to utilize a specialized formula of chemical grout that was hydroinsensitive, light-weight and highly expansive. The material’s initial permeation and structural capacity gave Vandenberg confidence in this alternative.

To meet the environmental compliance needs of the project, extensive preparations were necessary to minimize potential delays and protect endangered species that called this site their home. Some of the species included California Buckwheat, El Segundo Blue Butterflies, Tar Plants and the Red-Legged Frogs. To ensure the endangered plant/wild life habitat wasn’t inadvertently violated, environmentalists were onsite to pre-mark the plant life and be on the lookout for wildlife. If any of these species were disturbed or damaged, the project could have seen an immediate shutdown.

In regards to the culvert, EagleLIFT stabilized its entire 200 ft length. At the crushed joints, a 2ft injection of chemical grout created a thick arch of material and densified aggregate. The arch was designed to provide a convex, dense structural layer that would help provide structural stability and reinforcement to the crushed CMP. This would help mitigate further damage from occurring and re-establish limited drainage capacity.

The remaining portions of the culvert were stabilized using a consistent gridded injection pattern. The goal here was to fill any annular voids and restore the bearing capacity of the adjacent support soils.

“This was a high-profile project with an approximate $1.5B mission and national security at stake,” stated Carlos Castillejo, Project Manager for EXBON, the General Contractor for the project. “All eyes were on the EXBON-EagleLIFT Team to complete the project successfully and without delay, something we did with absolute success!”

The terms of the project were to complete the project in a 30-day window, spanning from September 14 – October 14, 2017. The project was completed in 8 days with no delays or adverse environmental impacts.

“We would like to thank both Vandenberg and EXBON for their confidence in EagleLIFT, and we were glad to be a small part of ensuring the missions of our military are executed with the utmost quality and efficiency,” says Donald J. Moody, President and Owner of EagleLIFT. “As a retired USAF Colonel, I take great pride to ensure that EagleLIFT’s operations are top notch especially for our military clients.”

About EagleLIFT
EagleLIFT has offices in Ontario, CA, Concord, CA, Las Vegas, NV and Rialto, CA. EagleLIFT is a Class “A” General Engineering Contractor and holds SB, SBE and DVBE certifications and services Arizona, California and Nevada.

Multi Residential Slab Lift Selmar CA

Multi Residential Slab Lift – Selmar, CA

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Project Challenges

Client:   Multi Residential Slab Lift
Location:   Selmar, CA
Project Summary: Reinforce, Lift and Stabilize a post-tension slab

Heavy Rains caused washout under a post-tension slab that had yet to be tensioned, causing the slab to settle 3-inches. Based on Geotechnical engineer potholng data, weak soils were determined to be along an adjacent retaining wall and soil loss was recorded from the 3 building slabs all the way to the wall.

Solutions and Results

The goal of the project was to stabilize and densify the soils underneath the perimeter of the building to the retaining wall to lift the slab and allow the home builder to tension the post-tension slab.  We stabilized the soils using our deep injection process using a hydro-insensitive two-part chemical grout.

The injections were made on a 5ft grid pattern at 10′ and 5′ depths to stabilize the soils at depth and to create an upward lift to the slab.  The project was completed in 3 days and all three buildings were stabilized and lifted back to grade.  The contractor was able to tension the post-tension slabs and get the project back on schedule.

Our Projects

California Water Service Generator Building Slab Lift

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Generator Building Slab Lift Project Challenges

Client:   California Water Services
Location:   Bakersfield, CA
Project Summary: Pump Station Generator building had severe settlement due to a severed water line undermining the support soils.

A pump station building holding backup generators was experiencing severe settlement after an 8-inch water line severed and undermined the support soil. Publicly bid project that was initially designed to use helical piers, as bedrock was at -70′ and the piles would be able to support the structure at -40′.

Generator Building Slab Lift Solutions and Results

Based on the engineering report, EagleLIFT determined that up to -20′ consisted of weak soils and could be strengthened using a two-part chemical grout and a specialized injection method, referred to as Deep Injection.  EagleLIFT provided an alternate bid and subsequently won the project.  After a 4 day installation, EagleLIFT stabilized and lifted the slab to grade and repaired the cracks using carbon fiber staples and epoxy.

Our Projects

Gila County Courthouse Soil Densification 2

Gila County Courthouse Soil Densification

Utilize Chemical Grout Shallow Surface Injection for soil densification and to lift and level the southwest corner of the building.

Gila County Courthouse Soil Densification 2

Project Challenges

Client:   Gila County Courthouse
Location:   Globe, AZ
Project Summary: Utilize chemical grout for soil densification and to lift and level the southwest corner of the building as much as is practicable.

An area of soil at the southwest corner of the building subsided after a recent rain storm. The subsided area measured approximately 30 feet in diameter and had a depression roughly 6 to 8 inches lower relative to surrounding areas

Solutions and Results

Utilize chemical grout to lift and level the southwest corner of the building as much as is practicable. This scope of work included underpinning approximately 40 linear feet of the building extending east and north from the southwest corner of the building.

Since there were no foundation or pavement to provide confinement, trench plates were used to resist the expanding material for the greatest densification of subgrade possible. Weak soils were successfully densified.

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http://eaglelifting.com/2014/09/15/polymer-injection/

Cooper Chase Retaining Wall Soil Stabilization

Cooper Chase Retaining Wall Soil Stabilization

Retaining wall soil stabilization to prevent soil collapse after retaining wall removal and installation of push piers.

Cooper Chase

Project Challenges

Client:   Cooper Chase Construction
Location:   Bass Lake, CA
Project Summary: Retaining wall soil stabilization to prevent soil collapse after retaining wall removal and installation of push piers.

A broken city water line undermined a 100-year-old, 16 ft.tall retaining wall between two vacation homes. EagleLIFT was contracted to provide retaining wall soil stabilization for the homes to prevent settlement, prior to retaining wall being removed and a new wall rebuilt. Soil stabilization to prevent soil collapse after retaining wall removal.

Solutions and Results

Push piers were installed under the perimeter wall of the home, as well as the garage on the high side of the retaining wall. Piers driven to depths of -40’.

Two rows of polymer injection were installed along perimeter of retaining wall to stabilize soils and prevent caving during removal and replacement of wall. Injections were made on 3’ centers and at 3’ vertical depths down to -18’ below grade.

Project support was provided by Cooper Chase Construction as the General Contractor, Brooks Ransom Engineers provided structural engineering, and Technicon Engineers provided the Geotechnical Engineering.

Crews battled snow and rain but were able to complete project on schedule. Retaining wall was removed and replaced without issue.

Our Projects

Skyline Parc Multi Residential Building Settlement

Skyline Parc Multi Residential Building Settlement

Slab Lift, Void Fill and Deep Injection Soil Stabilization to Repair Multi-Residential Apartment Building Settlement

Pool Wide Crack

Project Challenges

Client:   Skyline Parc Apartments
Location:   Las Vegas, NV
Project Summary: Slab Lift, Void Fill and Deep Injection Soil Stabilization of Multi-Residential Apartment Building

The Skyline Parc apartments in Las Vegas, NV was experiencing severe building settlement due to poor site drainage that was washing our foundation soils along the back perimeter of the building. The poor drainage caused settlement of nearly 9 inches and needed to be repaired quickly.

EagleLIFT was contacted by SFA Engineers to determine that Deep Injection would be a good fit for lifting and stabilizing the building and the adjacent pool deck.

Solutions and Results

Deep Injection was an ideal fit for soil stabilization and lifting the foundation for this job.  The reason is that voids were found throughout the building perimeter and the soils were loose and needed to be stabilized to prevent further washout.

The approach used injection locations at every 4 feet.  With this plan, the polymer would expand and densify the soil.  This would create upward movement and help lift the structure.  Additionally, the soils were stabilized and the voids were filled, preventing any future building settlement.

Our Projects

VA Office Slab Lift

Veteran Affairs Building Slab Lift – San Diego, CA

Veteran Affairs Office Building Slab Lift and Foam Jacking

Project Challenges

Client:   Veteran Affairs Office Building
Location:   San Diego, CA
The Veteran Affairs office building in San Diego, CA was experiencing settlement issues with its interior slab. After DCP tests were performed in 3 different locations to determine if issues were direclty below the slab or at depth.  The test determined the existence of weak soils at 8 to 16 feet below surface. The building required a slab lift to get the floors back into a useful condition.

In order to deal with the slab settlement, EagleLIFT designed a soil stabilization slab lift approach utilizing a chemical grout injection process that densifies the soil upward.  The process is unique in that it requires no-excavation and a minimal footprint for stabilizing the slab.

Solutions and Results

The chemical grout injection process was performed by injecting the chemical grout at 9′, 12′ and 15′ depths.   The injection pattern stabilized the loose soil layer and increased its weight-bearing capacity.  After the soil layer was stabilized, EagleLIFT conducted the slab lift by injecting directly underneath the slab.

The project was completed in 3 shifts over a weekend with no interruption to the facilities operations. The floor was lifted the full 4 inches and the and the slab was lifted back to original grade. EagleLIFT worked with STSC Engineering to develop a design plan for this slab lift project.

Our Projects

EagleLIFT Polymer Injection Foundation Lift and Foundation Repair

Port of Oakland Foundation Repair – Oakland, CA

Port of Oakland Foundation Repair – Oakland, CA

Project Challenges

Client:   Port of Oakland
Location:   Oakland, CA
Problem Summary: Settlement of gantry crane wheel path of 1/2″ to 4″

Over the years of heavy use, the pavement, base and sub-base beneath the Port of Oakland’s gantry crane wheel paths had started to subside.  Ground subsidence is very common in situations as this, cyclical loading and heavy loading conditions, especially when the loads have increased over the years. The differential settlement not only made it difficult for the operators to align their cargo properly, but also created a safety hazard while the cranes traveled amongst the site. The settlement ranged anywhere from a 1/2″ up to 4″ at the worst case.

Port of Oakland Chooses EagleLIFT

When it comes time for Port Engineers to evaluate the different repair processes for their pavement maintenance and rehabilitation, numerous factors must be considered.  Factors such as down time to the end client, company qualifications, company experience and services being offered.

Once these factors were taken into account, only one contractor met the criteria:  EagleLIFT, Inc.

Solutions and Results

Prior to any injections taking place, EagleLIFT conducted a series of Dynamic Cone Penetration (DCP) tests to measure the relative soil density.  The DCP tests indicated that the sub-base needed to be densified at the -2.5′ depth.

Deep Injection was then utilized to densify those soils and lift the pavement to grade. The two-part polymer material is injected through 1/2″ tubes which are driven down to depth through the pavement.  The resulting mixture polymerizes beneath the slab, creating minimal heat with optimum expansion.  With this expansion, the material aggressively seeks out voids filling them while densifying surrounding soils and lifting the pavement back to its original elevation eliminating the settlement.

This Port’s proactive approach and willingness to embrace new technology allowed EagleLIFT to work with Port officials and Engineers to address the settlement issues and possible solutions for it. This particular project exhibited the greatest problem to the client since closing the aisles, removing the pavement and replacing it would not only be costly, but also highly disruptive to Port operations.

This method was chosen for the following reasons.  First, laboratory testing of the material used, proved it maintains its integrity for more than 10 years with no shrinkage or degradation.  Recent studies of other one-part grouts found that conventional grouts are significantly impacted by the factor of time and “wet/dry” cycles.  This unique method is quick, eliminates the need for removal and re-pouring as well as dramatically decreasing the disturbance to normal use if this area.  Resins injected cure within 15 minutes allowing full use to be restored almost immediately after the work was completed.

Our Projects

EagleLIFT Foundation Repair Parking Lot

Home Depot San Francisco Concrete Lift

Home Depot San Francisco Concrete Lift

7 inch home depot

SAN FRANCISCO CONCRETE LIFT Challenges

Client:   Home Depot
Location:   San Francisco, CA
Problem Summary:  12″ thick 32″x25″ hinge slabs settled more than 7.5″

Home Depot Chooses Patented Polymer Slab Lifting Technique to Lift Sunken Hinge Slabs.

Deep injection process was chosen by Home Depot to eliminate some settlement / ponding issues of various hinge slabs. These hinge slabs were approximately 32’x 25’ and were more than 12” in thickness. The slabs needed to be lifted an average of 7.5”.

The unique process of deep injection relies on the expansive properties of a two-part expanding resin system (an expansion co-efficient of twenty to one) and a quick cure (15 minute cure time), to lift and re-align while stabilizing weak soils beneath slabs on grade.

LOW COST CONCRETE LIFTING METHODS IN SAN FRANCISCO

The two-part polymer material is injected through 5/8″ inch diameter holes drilled through the slabs. The resulting mixture polymerizes beneath the slab, creating minimal heat with optimum expansion. With this expansion, the material aggressively seeks out voids filling them while densifying surrounding soils and lifting the slab back to its original elevation eliminating the settlement.

This firm’s proactive approach and willingness to embrace new technology allowed EagleLIFT to work with company officials to address the settlement issues and possible solutions for it. This particular project exhibited the greatest problem to the client since re-pouring the slab would not only be costly, but also highly disruptive to daily operations

Home Depot San Francisco Concrete Lift Solutions and Results

The technicians drilled the 5/8” holes through the slab as a means of delivering the two part polymer to the underside of the slab. Because the material is self-propelled, the polymer expands to gain resistance from soils while aggressively filling voids. Once the voids have been effectively filled and the base soils compressed, the slab begins to lift.

Injections Successful:

EagleLIFT was able to lift 13 back to within 1/8” of their original elevation in approximately 4 shifts. The structural resins reach 90% of their compressive strength within 15 minutes allowing for immediate use of the slab after treatment. The reason for the accuracy is that the method does NOT depend on the pumping pressure, as some of the conventional methods do, but rather on the expansion rate of the resin. All parties were very pleased with the work done, the short length of time it took to successfully complete the project and the cost savings that resulted.

Our Projects