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
Information terminal, setting information distribution server, right information distribution server, network connection setting program and method
Compounds and their salts specific to the PPAR receptors and the EGF receptors and their use in the medical field
Corner wrap for use with a pallet
Wireless communication system, associated methods and data structures
Actuator, actuator structure and method of manufacturing actuator
System and method for access of user accounts on remote servers
Personal warming apparatus
  Randomly Featured Patents
User management for repository manager
Heat sensitive element and a method for producing lithographic plates therewith
Method and system for the magnetic recording of information elements and information medium by providing current correction for cross-talk magnetic flux
Scratch-resistant and abrasion-resistant transparent polyurethane film with energy-absorbing and antifogging properties, process of production, and window panes using it
Electro-optic slate for direct entry and display and/or storage of hand-entered textual and graphic information
Spoon or similar article
Magnetic latching system for mems optic switches
Wind turbine
Linear actuator release mechanism and electronic cruise control based thereon
Redundant blower unit