Commercial Foundation Repair in TN, including Richmond, London & Somerset.

Commercial Push Pier Systems

Push piers lift and stabilize commercial foundations to provide a permanent solution.

The push pier system utilizes high-strength round steel tubes and a load transfer bracket (retrofit foundation repair bracket) to stabilize and/or lift sinking or settling foundations. The foundation bracket is secured against the existing footing and pier sections are driven hydraulically through the foundation bracket and into the soil below using the combined structural weight and any contributory soil load as resistance. Pier sections are continuously driven until a suitable load-bearing stratum is encountered. At that point, the structure either begins to lift or the target pressure/load is achieved. The weight of the structure is then transferred from the unstable soil, to the foundation brackets, through the piers, and to firm load-bearing soil or bedrock.

The push pier system develops a factor of safety against pier settlement by the pier installation methods used and the sequence with which multiple piers are driven and then re-loaded. Piers are first driven individually using the maximum weight of the structure and any contributory soil load. After all of the piers are driven, the piers are re-loaded simultaneously, and the total reaction load is distributed over the multiple pier locations. Since the average load on each pier during the load transfer operation is less than the load during pier installation/driving, a factor of safety against settlement is achieved. Typical factors of safety against pier settlement range from about 1.5 to 3.0, with higher values generally achieved for structures with greater rigidity. These factors of safety conservatively ignore any additional long-term frictional component to the pier's capacity (see below for more information).

Design Considerations

Push piers are installed directly adjacent to the existing structure utilizing side-load brackets. This introduces eccentricity into the system. The moment or bending force is localized within a relatively short distance below the bracket. Although the bending force is dissipated quickly by the pier bearing against the confining soil, it is significant and cannot be ignored. The depth or length of sleeve and pier over which the bending force dissipates is a function of the soil stiffness near the surface. The depth is greater in soft clay and loose sand, and less in stiff clay and dense sand. In soft or loose soils, a small portion of the bending force may be transferred to the pier below the sleeve, thereby reducing the pier's allowable axial compressive capacity. A modified, lower capacity system is also available with a shorter, 30-inch long sleeve for low headroom applications.

Friction Reducing Collar

The first pier section advanced into the ground includes a larger-diameter "friction reducing collar" welded to the lead end. This collar, being larger in diameter than the pier tube, effectively creates annular space around the pier as it is advanced through most clayey soils. In soft clay or clean sand and gravel, an annular space may only temporarily be created. However, the larger diameter collar causes soil disturbance or remolding to occur, which also significantly reduces frictional resistance on the outside surface of the pier during driving. The result is a driven pier that generates most of its capacity in end bearing. Over time, the soils surrounding the pier relax back into the annular space and against the pier shaft. This provides an additional frictional component to the pier's capacity. Even though this frictional capacity may be significant, it is conservatively ignored in the determination of the pier's factor of safety against pier settlement.

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Serving TN including the Greater Richmond area
Our Tennessee Service Area
Cities in Anderson County, TN
Andersonville
Briceville
Clinton
Lake City
Norris
Oak Ridge

Cities in Bledsoe County, TN
Pikeville

Cities in Blount County, TN
Alcoa
Friendsville
Louisville
Maryville
Rockford
Tallassee
Townsend
Walland

Cities in Bradley County, TN
Charleston
Cleveland
Mc Donald

Cities in Campbell County, TN
Caryville
Duff
Jacksboro
Jellico
La Follette
Newcomb
Pioneer

Cities in Carter County, TN
Elizabethton
Hampton
Roan Mountain
Watauga

Cities in Claiborne County, TN
Arthur
Clairfield
Cumberland Gap
Eagan
Harrogate
Lone Mountain
New Tazewell
Pruden
Shawanee
Speedwell
Tazewell

Cities in Clay County, TN
Celina

Cities in Cocke County, TN
Bybee
Cosby
Del Rio
Hartford
Newport
Parrottsville

Cities in Cumberland County, TN
Crab Orchard
Crossville
Pleasant Hill

Cities in Fentress County, TN
Allardt
Clarkrange
Grimsley
Jamestown
Pall Mall

Cities in Grainger County, TN
Bean Station
Blaine
Powder Springs
Rutledge
Thorn Hill
Washburn

Cities in Greene County, TN
Afton
Chuckey
Greeneville
Midway
Mohawk
Mosheim

Cities in Grundy County, TN
Altamont
Beersheba Springs
Coalmont
Gruetli Laager
Monteagle
Palmer
Pelham
Tracy City

Cities in Hamblen County, TN
Lowland
Morristown
Russellville
Talbott
Whitesburg

Cities in Hamilton County, TN
Apison
Bakewell
Birchwood
Chattanooga
Collegedale
Harrison
Hixson
Lookout Mountain
Lupton City
Ooltewah
Sale Creek
Signal Mountain
Soddy Daisy

Cities in Hancock County, TN
Kyles Ford
Sneedville

Cities in Hawkins County, TN
Bulls Gap
Church Hill
Eidson
Mooresburg
Mount Carmel
Rogersville
Surgoinsville

Cities in Jefferson County, TN
Dandridge
Jefferson City
New Market
Strawberry Plains
White Pine

Cities in Johnson County, TN
Butler
Laurel Bloomery
Mountain City
Shady Valley
Trade

Cities in Knox County, TN
Corryton
Heiskell
Knoxville
Mascot
Powell

Cities in Loudon County, TN
Greenback
Lenoir City
Loudon
Philadelphia

Cities in Marion County, TN
Guild
Jasper
Sequatchie
South Pittsburg
Whiteside

Cities in Mcminn County, TN
Athens
Calhoun
Englewood
Etowah
Niota
Riceville

Cities in Meigs County, TN
Decatur
Georgetown
Ten Mile

Cities in Monroe County, TN
Madisonville
Sweetwater
Tellico Plains
Vonore

Cities in Morgan County, TN
Coalfield
Deer Lodge
Lancing
Oakdale
Petros
Rugby
Sunbright
Wartburg

Cities in Overton County, TN
Allons
Allred
Alpine
Crawford
Hilham
Livingston
Monroe
Rickman
Wilder

Cities in Pickett County, TN
Byrdstown

Cities in Polk County, TN
Copperhill
Delano
Farner
Reliance
Turtletown

Cities in Putnam County, TN
Cookeville
Monterey

Cities in Rhea County, TN
Dayton
Evensville
Grandview
Graysville
Spring City

Cities in Roane County, TN
Harriman
Kingston
Oliver Springs
Rockwood

Cities in Scott County, TN
Elgin
Helenwood
Huntsville
Oneida
Robbins
Winfield

Cities in Sequatchie County, TN
Dunlap
Whitwell

Cities in Sevier County, TN
Gatlinburg
Kodak
Pigeon Forge
Sevierville
Seymour

Cities in Sullivan County, TN
Blountville
Bluff City
Bristol
Kingsport
Piney Flats

Cities in Unicoi County, TN
Erwin
Flag Pond
Unicoi

Cities in Union County, TN
Luttrell
Maynardville
Sharps Chapel

Cities in Van Buren County, TN
Spencer

Cities in Washington County, TN
Fall Branch
Johnson City
Jonesborough
Limestone
Telford

Cities in White County, TN
Sparta

Cities in Bland County, VA
Bastian
Ceres
Rocky Gap

Cities in Bristol City County, VA
Bristol

Cities in Buchanan County, VA
Big Rock
Davenport
Grundy
Hurley
Mavisdale
Oakwood
Pilgrims Knob
Raven
Rowe
Vansant
Whitewood

Cities in Dickenson County, VA
Bee
Birchleaf
Clinchco
Clintwood
Haysi
Mc Clure
Nora

Cities in Grayson County, VA
Elk Creek
Independence
Mouth Of Wilson
Troutdale
Whitetop

Cities in Lee County, VA
Blackwater
Dryden
Ewing
Jonesville
Keokee
Pennington Gap
Rose Hill
Saint Charles

Cities in Norton City County, VA
Norton

Cities in Russell County, VA
Castlewood
Cleveland
Dante
Honaker
Lebanon
Rosedale
Swords Creek

Cities in Scott County, VA
Duffield
Dungannon
Fort Blackmore
Gate City
Hiltons
Nickelsville
Weber City

Cities in Smyth County, VA
Atkins
Chilhowie
Marion
Saltville
Sugar Grove

Cities in Tazewell County, VA
Amonate
Bandy
Bishop
Bluefield
Broadford
Cedar Bluff
Doran
Falls Mills
Jewell Ridge
North Tazewell
Pounding Mill
Richlands
Tannersville
Tazewell

Cities in Washington County, VA
Abingdon
Bristol
Damascus
Glade Spring
Meadowview
Mendota

Cities in Wise County, VA
Appalachia
Big Stone Gap
Coeburn
East Stone Gap
Pound
Saint Paul
Wise

Cities in Wythe County, VA
Cripple Creek
Crockett
Rural Retreat
Speedwell

Cities in Mcdowell County, WV
Cucumber
Jenkinjones
Newhall
War
Warriormine

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