The applied method to the pile with preflex

 

 The pile is the structure which resist horizontal resistance by earth pressure so that make constructions to be carried out safely and smoothly and which prevent soil, sand and rocks falling from the excavated wall. The existing piles are against the earth pressure used by H shape steel, steel pipes, Sheet piles, and etc. But, Because H shape steel, steel pipes, and Sheet piles are bordered on earth and soil and mostly under the ground water level, they are easy to rust away, and in case of deeper boring depth, the cross section are getting bigger to be against the bigger earth pressure. moreover, a lot of strut for supporting the pressure had to be prepared for the lateral deformation.

 This method to the pile with preflex is the method against the earth pressure of the excavated wall used by the composite preflex beam which is fully applied the  mechanical advantages of materials; steel and concrete by introducing prestress into H-shape steel covered concrete. And, It can make rust minimized by covering steel with concrete and make effect of reducing materials by using smaller cross section of the pile and make the amount of strut minimized by increased section stiffness, so for the sides of securing work space, construction expenses, and construction period, it is the new improved method of the composite preflex beam.

The method to the pile with preflex applied one side lateral loading

 

The distribution diagram of the one side lateral pressure

The equipment of production pile with preflex applied one side lateral loading

 

Contents of construction

Steps of construction

Simple leaving

Applying the load for the plastic deformation

    

Applying the preflex loading

 

 

Covering casing concrete

     

Separation

  

Covering the rest concrete

      

 

the completion diagram of pile with composite preflex beam

 

 

 

 

 

 

 

 

 

 

The method to the pile with preflex applied both sides lateral loading

 

The distribution diagram of the both sides lateral pressure

The equipment of production pile with preflex applied both sides lateral loading

 

Contents of construction

Steps of construction

Connecting dummy H-shape steel

Applying the first preflex loading

 

Covering the lower casing concrete

 

Release

  

Applying the secondary preflex loading

  

Covering the upper casing concrete

 

Release

Complete

 

The method of connection pile to pile

 

 

 

The method of introducing compressing prestress to the web concrete with P.C steel line

 

 

 

The completion diagram of pile with composite preflex beam

(in the case of the load applied both sides)