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
Method for forming a semiconductor device using selective epitaxy of group III-nitride
Image forming apparatus and information processing apparatus
Memory device program window adjustment
Control unit of a ride level control system, and ride level control system
Polymer composites having highly dispersed carbon nanotubes
Scalable pixel coverage function-map
Orthogonal tunable antenna array for wireless communication devices
  Randomly Featured Patents
Apparatus for correcting load appearance
System and method for assessment of health risks and visualization of weight loss and muscle gain
Process for forming multilayer coating
Air-conditioning control apparatus
Communications, information, maintenance diagnostic and training system
Apparatus for controlling the radial play of a roller bearing
Device for detecting ambient light and light in the area in front of a motor vehicle
Method of forming crystalline compound semiconductor film
Image recording apparatus
Inflatable boat protective cover