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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 Hshape 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.
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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 Hshape 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) 

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