ATT Colunm

Teno Column and steel pipe with wings will combine to form a unity, thank to that the bearing capacity is much greater, ATT Column preform high bearing capacity and especially in weak geology. The ATT Column is a hybrid pile that combines the highly reliable Teno-Column method “column” with “vane steel pipe” that has adopted the screw pipe EAZET-II TECHNOLOGY. These columns provide high bearing capacity because they unify column sand vane steel pipe.

 According to statistics from 2002, there are more than 3000 projects in Japan have been developed by applied ATT Column. Furthermore, ATT Column is also an environmentally friendly column that has low vibration and noise, and produces little waste soil.

Steel pipe with wings was developed from “EAZET-II” technology (Screw Pile Technology)”

Construction processes

Construction using ATT Column divides into 2 stages as following

1. ATT Column construction stage.

–  The method of treating deep layer by the machine will not make the surrounding ground and the top of the column weaker.

–  Always ensure the mobility while non-frozen column until consolidation.

2. steel pipe with wings construction stage.

–  Steel pipe with wings have easily constructed and ensure the unity of the column. –  Because of using the steel pipe that sealed up at its head, when steel pipe with wings is rotated to bury into the pile, it will compact the mixture of cement and earth. As a result, there is no earth incurred which need to dig and move away.

ATT Column Features

High Capacity for Vertical Loads

Steel pipe with wings will combine with Teno-column to transmit loads effectively, so ATT Column is capable of withstanding large vertical loads.

High horizontal load capacity

Teno-column and steel pipe with wings will combine together to form a unity, therefore, the horizontal load capacity will be increased.

Highpulloutloadcapacity 

Construction in urban or narrow areas

Easy in quality and pile head controling

Low vibration and low noise

Low vibration and noise are attended through the column and vaned-steel pipe method. The surrounding area is unaffected by construction noise and vibrations

Low waste soil

Standard dimensions for ATT Column

Load Capacity

ATT Column has great load capacity by the combination between construction method and materials. The combination of the ground reinforcement by mixed depth treatment method and application of the rotation construction method to put the steel pipe into body of the Teno-column will help the loads which are transmitted effectively from steel pipes to Teno- blades and then through pipes, ground. Besides, depth mixing treatment method will allow to construct the Teno-column without making the soil weaker. Moreover, when rotating to bury the steel pipe, result in more compaction between pile and surrounding soil. Thank to rotating blades, steel pipe and cement pile can combine to rigid form. Finally, due to the consolidation of soil and cement, pile and surrounding soil will combine into a block, therefore, increasingly the vertical load capacity.