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
Method and system for streaming digital video content to a client in a digital video network
Tunnel magnetoresistance read head with narrow shield-to-shield spacing
Probe for ultrasound diagnostic apparatus
Compositions and methods using microspheres and non-ionic contrast agents
Apparatus and method for evaluating an activity distribution, and irradiation system
Methods and apparatuses for configuring and operating graphics processing units
Semiconductor device
  Randomly Featured Patents
Polyimide and/or polyamide-imide compositions in mixed solvents
Modified concealing device and method for a speech decoder
Device for marking presence, reservation or information
Display of a verification image to confirm security
Multi-perforated nozzle head for carpet and floor cleaners
Management of redundancy in data arrays
Slicer knife guard and sharpener
Low expansion ceramic material
Necklace slider
Flex detach toothbrush