Slope Stabilization | Geotechnical Construction
Snoqualmie Pass Rockslide
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Project Description
In November of 2005, a large rock slide occurred along Interstate 90 on the eastern side of Snoqualmie Pass. The slide forced the closure of I-90 until an assessment had been completed and a rock fall fence was installed. Washington Department of Transportation appointed Wilder Construction to initiate site cleanup and stabilization. The stabilization and cleanup of the rockslide was critical and needed to be completed as fast as possible to minimize road restrictions on I-90 during the peak travel of Thanksgiving weekend.
Team Members
Washington State Department of Transportation, Wilder Construction Company, Golder Associates, Wyllie & Norrish Rock Engineers Inc., Crux Subsurface Inc.
Crux’s Role
Crux Subsurface, Inc. was contracted to provide emergency rock bolt installations for the stabilization of further potential rockslides at the location. Prior to Crux’s arrival, several rock bolts were installed that did not reach the required depths for embedment, nor did they achieve the required pull out strengths. In addition to grouting the bar rather than using epoxy, Crux utilized a specialty drilling approach to achieve project requirements.
Due to the exposure of continued rock fall at this location, equipment for installing rock bolts was craned into place using work platforms. Cranes were setup outside the rockslide area to avoid potential injuries and damage. During the course of drilling, a large rock slab broke free and severed a platform anchor, identifying the severity of the problem and confirming the need for deeper and additional rock bolts. Initial rock bolts were installed to secure the outer limits of the rockslide and allow cranes to move within closer proximity for the remainder of the project.
Crux crews worked through the Thanksgiving holiday in challenging winter weather to ensure the timely reopening of I-90’s east bound lane. The project was successfully completed in a timely manner.
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To request additional information, please use our Contact Page or call 866-CRUXSUB (866-278-9782).
