Resources Contact Us Home
Apparatus for providing a support column

Image Number 15 for United States Patent #8043028.

A primary earth penetrating mandrel formed of a hollow shell steel plate octagonal in cross-section has an upper end and a blunt lower end joined by an upwardly and outwardly tapered wall. The mandrel is driven downwardly in the earth to simultaneously form a vertical tapered cavity while compacting the sidewall of the cavity to provide structural integrity. The mandrel is then moved upwardly from the bottom of the cavity and aggregate is deposited in the bottom of the cavity following which the mandrel is lowered so that its blunt lower end engages the deposited aggregate and densifies the aggregate by vertical vibratory action and static force with these steps being repeated until the pier top is near the surface of the earth at which time the upper aggregate portions are densified by either the primary mandrel or a secondary mandrel having a substantially larger lower end surface than the lower end surface of the primary mandrel. A second embodiment includes a conduit in the primary mandrel for injecting concrete or grout into aggregate previously deposited in the cavity.

  Recently Added Patents
Grounding fitting
Stability control system with body-force-disturbance heading correction
Magnetoresistive element and manufacturing method of the same
Far field telemetry operations between an external device and an implantable medical device during recharge of the implantable medical device via a proximity coupling
Display apparatus
Device for data routing in networks
Multilayered material sheet and process for its preparation
  Randomly Featured Patents
Method and circuit for testing integrated circuit modules
Use of styrene and maleic anhydride copolymers as dispersing agents and/or for treatment of mineral fillers and thermoplastic compounds containing same
Automatic focusing apparatus for scanning electron microscope
Sole with V-oriented flex grooves
Hub drive and method of using same
Cryogenic coal bed gas well stimulation method
Soap bag fitment
Air-guard corner and edge protector
Electric driving tool
Common mode ground fault signal detection circuit