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		SOLVING LIMITED ACCESS Retaining Wall Special Issue CASE STUDY #21 (1 of 10) This page concerns the replacement of a retaining wall which had collapsed between two apartment buildings, resulting in the evacuation of families of both the upper and lower units. The collapsed wall was 10 feet tall, with only 10 feet between the buildings, and much less separating the lower building from the collapsed wall. CASE STUDY #21 (2 of 10) The wall viewed from the north end. CASE STUDY #21 (3 of 10) The wall failure undermined the upper building, but within days Avalon Structural had solved this problem by underpinning the upper building, and the City permitted the tenants to safely return home. CASE STUDY #21 (4 of 10) Avalon then installed a temporary, top-down, tied-back (i.e. using helix anchors) shoring wall which allowed us to safely remove the failed wall. The construction worker on the right is tightening the temporary tie-backs; the construction workers on the left are removing the last of the collapsed wall. CASE STUDY #21 (5 of 10) Shotcrete being applied to the lower half of the top-down shoring wall. CASE STUDY #21 (6 of 10) Now the permanent replacement wall could safely be built. CASE STUDY #21 (7 of 10) Avalon then installs Xypex waterproofing on the new wall, and the back-drain pipe is installed. CASE STUDY #21 (8 of 10) The installation of the drain rock. CASE STUDY #21 (9 of 10) Finished wall, south end. The upper portion of the shoring wall was finished as a permanent wall. CASE STUDY #21 (10 of 10) Finished wall, north end. 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.