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
Telephone relaying apparatus, telephone relaying method, and program
Organic light-emitting display and method of manufacturing the same
Mobile terminal and method for changing page thereof
In-vehicle communication system and method of operation
Fuel cell stack including ejector and blower for anode recirculation and method for controlling the same
Heat stable variants of plant adenosine diphosphate glucose pyrophosphorylase small subunit
Dimmer system and damper circuit thereof
  Randomly Featured Patents
Method and apparatus for recovering valuable metals from slag and manufacturing multifunctional aggregate
Non-blocking dynamic fast packet switch for satellite communication system
Computer controlled separator device
Apparatus and method for automatic airborne LiDAR data processing and mapping using data obtained thereby
Horizontal bus bar splice for control center
Electrical connector and dual purpose test jack
Gripper device
Browser program for performing table-layout
Method and apparatus for casting directionally solidified articles
Method and apparatus for in situ visual inspection of die products in tape and reel shipping medium