MAIN MENU       About Us Inspection Request Contact Information Glossary Careers at Avalon  FOUNDATIONS  Deep Foundations Helical Piles and Helical Tiebacks For Enginners: Typical Helical Specifications Drilled Piers Liquefaction Solved   FOUNDATION REPAIR   Underpinning Horizontal Cracks Foundation Replacement Resistive Piers Underpinning Done Right   COMMERCIAL PROJECTS   Mega Foundations with Helical Piles Solar Panel Arrays with Ground Screws Pipeline Anchors Bridge Abutments Post-tensioned Concrete More Commercial Projects   RETAINING WALLS   Retaining Wall Basics Retaining Wall Fortification Solving Limited Access Using EPS Blocks Using W-beams  EXCAVATION  & GRADING Excavation & Drilling Grading   SPECIAL HILLSIDE   ISSUES Road Washout Repair Road Fortification Hillside Stabilization Challenging Hillside Additions & Patios Landslide Repair Impact Walls   OTHER PROJECTS   Avalon Supports the Famous Rockettes		ROAD WASHOUT REPAIR CASE STUDY #04 (1 of 5) The following five pictures concern a road washout along steep hillside. Owner had searched three years to find an affordable contractor. Before finding Avalon, his lowest bid was over $200,000 to repair the washed-out road. CASE STUDY #04 (2 of 5) For vertical support down into bedrock, Avalon employed 3.5" round-shaft helical piers. These piers were then grouted. Additionally, 1.5" square shaft helical tiebacks were driven diagonally to hold the road section to the hillside. CASE STUDY #04 (3 of 5) The outboard grade beam has been poured. Cantilever platform in place, curb formed. Inboard grade beam helix and steel set, deck double mat steel set, ready for concrete. CASE STUDY #04 (4 of 5) Avalon's final bill to the owner: much less than the competition. Job completed start to finish in 21 calendar days despite rain. Owner happy; Avalon proud. Design Engineer: Bob Patterson, Patterson & Associates. Soils Engineer: Becky Dees, Dees & Associates. CASE STUDY #04 (5 of 5) Here is the finished product from another view. CASE STUDY #15 (1 of 2) Here is a typical minor road washout. A different contractor had proposed using a W beam retaining wall alongside the road. CASE STUDY #15 (2 of 2) Our solution at Avalon was less expensive, more certain, and would last longer. We proposed using vertical helical piers and tiebacks with concrete. Avalon also upgraded the culvert with a larger pipe and new inlet. Soils Engineer: Don Tharp, Tharp & Associates Project Engineer: Bob Patterson, Patterson & Associates. CASE STUDY #23 (1 of 1) Avalon installed vertical and diagonal helix piers to support this section of road over poor soils. Design engineer: Bob Patterson, Patterson & Associates Soils engineer: Haro & Kasunich. Avalon Structural, Inc. 181 Ridgeview Drive Aptos, CA 95003 (831) 479-4389 (office) info@avalonstructural.com Copyright © 2015 Avalon Structural, Inc. All Rights Reserved CA License 677116 Classifications:  B, C-8 Avalon is a general building contracting firm and does not employ engineers.