Bi-directional Testing

To read the articles in their entirety, click on an article title

The O-cell Advantages

DESIGN: Excellent tool for value engineering foundation redesign. HIGH TEST LOAD CAPACITIES: Test loads routinely exceed 27 MN. However, O-cell test capacities are available from 0.44 MN to greater than 200 MN under suitable conditions. REDUCED WORK AREA: Required work...

Multi-Level Report

EXECUTIVE SUMMARY A 48-inch (1,219-mm) dedicated test shaft was tested by LOADTEST. The shaft was constructed under bentonite slurry to a depth of 49.5 feet (45.57 meters). Sub-surface conditions at the test shaft location consist primarily of alternating layers of...

Augercast (ACIP) Report

EXECUTIVE SUMMARY LOADTEST tested a 30-inch (762-mm) diameter dedicated test pile constructed to a depth of 121.5-foot (37.03-meter). Sub-surface conditions at the test pile location consist primarily of medium dense sand and coquina limestone of varying degree of cementation. The...

Single Level Report - Rock Socket

EXECUTIVE SUMMARY LOADTEST tested a 48-inch (1,219-mm) dedicated test shaft constructed to a depth of 46 feet (14 meters). Sub-surface conditions at the test shaft location consist primarily of silty clay underlain by shale and limestone. The maximum bi-directional load...

Single Level Bi-Directional Static Load Test

The O-cell is a hydraulically driven, high capacity, sacrificial loading device installed within the foundation unit. As the load is applied to the O-cell, it begins working in two directions; upward against upper side shear and downward against base resistance...

Multiple Level Bi-Directional Static Load Test

Single or multiple O-cells® can be arranged on multiple levels to isolate strata of interest. A zone of interest can be isolated within the 2 levels of O-cells and zone specific data can be retrieved from mobilzing this section. The...

Drilled Shafts, Bored Piles and Caissons

The O-cell® is used in production (proof tests) and non-production (preliminary test) piles either attached to the pile/shaft’s reinforcing steel cage or placed using a steel beam carrier frame. Multiple O-cells can be used and placed on the same...

Augercast (ACIP) Piles

O-cells® have been successfully installed in Augercast (ACIP) piles to depths exceeding 150 feet. Installation of the O-cell does not change the typical Augercast (ACIP) construction method, however, a modified grout mix is recommended to ease placement into the...

Slurry Walls / Barrettes

Loadtest has been engaged on several barrette projects and has developed an efficient, cost effective method for full scale static load testing of barrettes using the O-cell method. Barrettes are often used as a single load carrying foundation element capable...

Driven Piles

Specially constructed O-cells® can be attached to driven piling. Load testing can be performed on prestressed concrete piles, steel pipe piles and cylinder piles. For driven piles, a rugged design ensures that O-cells driven to refusal conditions perform as designed....