Resources Contact Us Home
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
Wireless refrigerant scale platform
Charging seat having cleaning member
Reliable event broadcaster with multiplexing and bandwidth control functions
Leadless integrated circuit packaging system and method of manufacture thereof
Non-volatile semiconductor memory and data processing method in non-volatile semiconductor memory
UV exposure method for reducing residue in de-taping process
Reliability fire pressure switch
  Randomly Featured Patents
Cage with micro filter top
Instrument for recording blood pressure
Monolithic semiconductor light emitter and amplifier
Device and method for confirming bite registration for dental implants
Method and apparatus for cylinder balancing
Multiple purpose reticle layout for selective printing of test circuits
YIQ Computer graphics system
Device for increasing the tracking accuracy of an aiming system
Branch prediction technique using instruction for resetting result table pointer
System and method for optimization of gas lift rates on multiple wells