HOME       Foundation Inspection Glossary of Foundation Terms Recent Project Highlights   FOUNDATION REPAIR   Horizontal Crack Repair Improper Horizontal Repair Underpinning and Releveling Foundation Replacement  DEEP FOUNDATIONS  Helical Piles Resistive Piers Drilled Piers   RETAINING WALL   & HILLSIDE ISSUES New Retaining Walls Retaining Wall Fortification Walls with Limited Access Landslide Repair Hillside Stabilization Hillside Road Repair Hillside Additions   COMMERCIAL PROJECTS   Mega Foundations Post-tensioned Concrete More Commercial Projects   FOR ENGINEERS   Liquefaction? Problem Solved Typical Helical Specs   CAREERS & CONTACT   Personnel Careers at Avalon Avalon Supports the Famous Rockettes		UNDERPINNING and RELEVELING Symptoms of an unstable foundation:    - sloped floors    - cracks in foundations    - gaps in slab floors    - cosmetic distress within      the house Call Avalon for an evaluation and we will perform a precise floor level survey. Using the most modern technology, we will study the foundation for deficiencies. Avalon will then recommend the remediation and, as applicable, engineering work to be done by outside engineers. Avalon firmly believes in value-added contracting; if engineering is indicated, we will work with the engineer to produce accurate and cost-effective plans. Often, houses suffering differential settlement can easily be repaired using helical piers or other deep foundation elements to "underpin" the foundation. This foundation has been lifted to its original elevation, leaving a gap between concrete and earth. The yellow jack will now be removed. Unless the gap is desired to allow clay soil expansion, it is filled. Avalon always encases the lifting bracket in concrete, as opposed to backfilling with dirt, as we believe this is the best practice in California. In this example, helical piers were required behind a house where only 18" of clearance existed between the house and the large soldier piles of a retaining wall. An apartment complex of five (5) buildings was sinking. Avalon installed 182 helical piers to support the structures. Avalon can minimize damage to existing structures using custom-made extensions on its installation equipment. This sunroom had dropped a full 6 inches in one corner before Avalon installed helical piers and lifted the slab back to level. We then pumped grout under the slab to fill the void. After installation of the deep pier, Avalon fills the pier with rebar and grout for additional strength and corrosion protection. After lifting the foundation, Avalon places and vibrates concrete at each pier location, encasing the lifting bracket and filling the gap under the foundation. This process is superior to backfilling with soils as it provides (1) corrosion protection, (2) seismic stability, and (3) restores ground contact for redundancy and lateral strength. Case Study #87 Case Study #90 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.