The construction method of the Simple and Continuous P.S.C Beam by Up-Down method

 In this method, after setting the simple PSC beam manufactured in factory or field. Connecting perfectry by using joint-plate. After casting the slab concret in positive monent area, we up the inner support. Then after casting the slab concret in negative monent area, we down the inner support.

 In joint place, when each of manufacture the PSC beam, we place the bolt at uppre-flange in advance and connect using joint-plate. In bottom flange or lower web, we institute the joint-path and connecting by joint-bar. For the convenient construction, we institute the joint-elevated-place at center of gravity and inject the unshrinkable mortar into the space of the joint-path and joint-place.

  Construction procedure of simple  Composite PSC Beam

 The purpose of this method is this. After setting the simple PSC beam manufactured in factory or field. we recover the reduced compression that occured by creep and shrinkage at bottom of beam by institute the tempory support in the middle of span and up this tempory support. and add the compression at bottom of beam by increasing section that casting the slab concrete for composite the slab and PSC beam and then remove the tempory suport.

  New construction procedure of simple  Composite PSC Beam

 

Construction contents

Construction procedure

Set the PSC beam

Institute the tempory support and up

  

  

Casting the slab concrete

 

 

Remove the tempory support

 

Finished construction

 

Continuous P.S.C beam

 

 In this method, after setting the simple PSC beam manufactured in factory or field and connecting by using the joint-plate, induce the secondary compression at bottom of PSC beam and add the tension at slab concrete of inner support after composition. In three span comtinuous beam, up and down the two inner support in order.

  Joint connection method for organizing the continuous composite beam

 

A detailed drawing

  Construction procedure

 The construction procedure of organization method of the 2 span continuous composite

PSC beam by Inner support Up-Down method.

 

Construction contents

Construction procedure

Connecting after PSC beam setting

Up the inner support

Complete casting slab concrete

Down the inner support

Complete