The slope above a major traffic artery in Multnomah County, Oregon, began to erode with the material falling into the travel lanes below. Over time, the resulting scarp continued to regress back into private property by approximately 5 feet. GeoStabilization International®, leading soil nail wall contractors providing engineered soil repairs throughout the United States and Canada, was called to provide emergency design-build services for a permanent solution.
The sloping cut consisted of fractured rock on the bottom 2/3rd, with the top third having an upper mantle of overburdened soil. As the broken rock detached from the slope, the mantle’s material became undermined and fell to the highway below. Our engineers’ design entailed using soil nailing to construct a soil nail wall to encapsulate the upper soil layer for slope stabilization. For the rock slope portion, rock anchors were drilled into the slope, and a high-strength mesh secured to the anchors was chosen to provide rockfall mitigation.
To build the soil nail wall, an excavator-mounted drill working from the roadway above the slope drilled soil nails horizontally into its mantle portion. Forms were used to offset the wall’s face from the existing pitch, and the resulting area was backfilled with controlled low-strength material to regain the lost property. Drainboards were set on the front face and channeled to three collection points before reinforcing steel was attached to the soil anchors, and then shotcrete was applied.
The rockfall remediation installation began with sixty rock anchors drilled across the slope’s surface. Using the innovative excavator-mounted drill, all soil nails and rock anchors were installed from the slope’s bottom and top without needing intermediate benches. Then, 2,200 SF of high-strength galvanized mesh was laid on the fractured rock face before being secured with bearing plates. Then piping was connected to the three collection points mentioned above to drain those areas properly.
Rock slope failure poses a risk to commuters on the roadways and infrastructure, requiring a quick solution. GeoStabilization International® employs a team of trusted experts that provide safe and effective engineered solutions to restore structural integrity to rock faces and slopes.
If you employ us for slope repair and soil nail wall technology, you can expect:
When you choose GeoStabilization International®, you’ll work with experts in high-risk geohazard remediation and experienced with slope stability, allowing you to resume regular operations as soon as possible.
At GeoStabilization, we use technologies developed explicitly for mitigating geohazards. We will complete your critical repair with a long-lasting solution and little disturbance to the surrounding environment and roadways. For over twenty years, our teams have been mitigating landslides and providing residential slope stabilization, slope monitoring, slope protection, and landslide prevention services. Contact GeoStabilization International® at 855-579-0536 to learn how to utilize our geohazard mitigation services for your geotechnical application.
If you are interested in a no-obligation site visit to determine if our services fit your geohazard mitigation needs, call us at 855-579-0536 or fill out our contact form.
