Polymer grouting method for constructing multi-wing pile

Abstract

A polymer grouting method for constructing multi-wing pile, includes steps of: (1) arranging the positions of piles; (2) producing multi-wing drilling tool and locating holes; (3) installing grouting pipes; (4) polymer lifting grouting; (5) forming polymer multi-wing piles. According to the geologic characteristics, the three-wing drilling tool or the four-wing drilling tool are produced through pressing the drilling tool into each location of pile by a static pressure equipment to form the multi-wing holes, and injecting two-component expansive polymer materials to the holes, wherein the polymers expand and solidify after reacting for filling the holes and the gaps in the soil of slope to be fully integrated with the surrounding soil and form the polymer multi-wing piles.

What is claimed is: 
     
         1 . a polymer grouting method for constructing multi-wing pile, comprising steps of:
 (1) arranging positions of piles, comprising: arranging said positions on slopes which need be treated according to a design;   (2) producing a multi-wing drilling tool and locating multi-wing holes, comprising: producing said multi-wing drilling tool and press said multi-wing drilling tool for an expected depth to form said multi-wing holes at each location of pile according to said design;   (3) installing grouting pipes, comprising: installing said grouting pipes in said multi-wing holes, wherein said grouting pipes are provided at a center of said multi-wing holes, wherein outlets of said grouting pipes are provided at a bottom of said multi-wing holes;   (4) polymer lifting grouting, comprising: providing a grouting control equipment for lifting polymer on a top of said multi-wing holes, providing said grouting pipes into a pipe fixing device of said grouting control equipment for lifting polymer, injecting two-component expansive polymer materials through said grouting pipes of said polymer grouting system into said multi-wing holes, and turning on said grouting control equipment for lifting polymer at the same time;   (5) forming polymer multi-wing piles, comprising: lifting said grouting pipes according to a set rate, wherein said polymer materials expand and solidify after reacting for filling said multi-wing holes and gaps in said soil of slope to be fully integrated with a surrounding soil and form said polymer multi-wing piles.   
     
     
         2 . The polymer grouting method for constructing multi-wing pile, as recited in  claim 1 , wherein, in step (2), said multi-wing drilling tool is combined with a drill stem and multi-wings welding on a circumference of said drill stem, wherein a diameter D of cone probe of said drill stem is 40-80 mm, wherein said multi-wings are triangular steel plates welding blades, wherein a highness H of said multi-wings is 100-400 mm, wherein an angle α between a base of said multi-wings and said drill stem is 30-45, wherein a thickness T of said multi-wings is 10-30 mm. 
     
     
         3 . The polymer grouting method for constructing multi-wing pile, as recited in  claim 2 , wherein said multi-wing drilling tool comprises a three-wing drilling tool and a four-wing drilling tool.