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
Gas flow indicator
System and method for combining different tablets into a pouch
Therapeutic compositions and methods
Three-term predictive adder and/or subtracter
Technology for managing traffic via dual homed connections in communication networks
Apparatus, electronic component and method for generating reference voltage
System and method for data reconfiguration in an optical communication network
  Randomly Featured Patents
Marketing strategy support system for business customer sales and territory sales information
Nobleization of beta brass
Optimized prefetching for wide area networks
Method for determining premiums for representation and warranty insurance for mortgage loans
Speech recognition using re-utterance recognition
Islet cell antigen 1851
Quick-disconnect hose coupling device
Method and system for compensating for adjacent tracks during reading of data
Bridge-enhanced nanoscale impedance microscopy
Interconnect, interconnect forming method, thin film transistor, and display device