Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Manufacturing method and device of hollow-typed reverse circulating piles










Image Number 10 for United States Patent #4842447.

The invention is related to a kind of fabrication method and device of hollow reverse circulation piles of which the central hollow portion is installed with a movable sand barrel between which and the surrounding reinforcing cage, positioning device for movable sand barrel is installed. For starting the work, grouting to scheduled height from bottom of pile bore is made first and then grouting between pile bore wall and outer wall of movable sand barrel is conducted. Meanwhile, sands are poured into movable sandbarrel. By virtue of sensors on the inner and outer walls of movable sand barrel, the pressure between concrete grout and sand will be kept in equilibrium to avoid reverse grouting due to opposite pressure. Then, the sand barrel is pulled up step by step so that the pile poured with sand at its central part is primarily completed. Water is finally poured into the central part and sand is suctioned out to complete the hollow-typed reverse circulation pile. Its distinctive features are simplified and quick work process at low cost with high commercial value.








 
 
  Recently Added Patents
Electronic timepiece and time adjustment method for an electronic timepiece
Timing phase detection using a matched filter set
Tag latency monitoring and control system for enhanced web page performance
Thyristor comprising a special doped region characterized by an LDD region and a halo implant
Metal rolling oil composition
System for automatic management of applications on remote devices
Voice data leakage detection and prevention systems
  Randomly Featured Patents
Method and apparatus for controlling multimedia contents in realtime fashion
Liquid lubricated radial sliding bearing
Knife sharpener
Terminal test plug
Dental adhesive and method of use
Photoresist undercoat-forming material and patterning process
Slip control in a machine for matching hydraulic pump fluid flow to pump driven supplementary front wheel drive motor fluid flow
Target backing plate for sputtering system
Scrap metal reclaiming process
Image forming apparatus