Driveway & Singe Family Residence


The residence on this project was constructed on a relatively small bench located in the middle of steep slope areas in the North Bend area of King County. The primary geotechnical consideration for this development was construction of a paved driveway that had to cross very steep slope areas. The presence of old slide debris, including large boulders, overlying hard, intact bedrock required the use of micro-piles to support the driveway as a structural, reinforced concrete deck.  Soil nail shoring was utilized to temporarily retain the deep cut necessary for the house. Most of the residence was supported directly on intact bedrock, however, portions had to be carried on micro-piles extending through remaining slide debris to reach the bedrock.