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
Lens driving device
Medical injector
Case for electronic device
Expressive grouping for language integrated queries
Antibodies to OX-2/CD200 and uses thereof
Portable hand-held multi-function device for storing, managing and combining rewards
Stacked type semiconductor memory device and chip selection circuit
  Randomly Featured Patents
Compensating for layout dimension effects in semiconductor device modeling
Projected display for portable sensor indicating the location of a detected hidden object behind a surface
Particle beam irradiation system and method of adjusting irradiation apparatus
Pet enclosure
Remote control for architectural covering
Accessory sub-cooling unit and method of use
Paper dispenser
Electrical connector
Method and apparatus for transmitting multiple video streams over a video channel
Ultraviolet blister sealing means