STJ Method for Expanding and Reinforcing Underground Excavation

Since continuous work can be done with one machine, the construction efficiency is good and the construction cost is low.

The "STJ Method" is a construction technique that integrates the pile body and the bulb by hardening the ground improvement liquid that is injected at high pressure into the tip of the pile, thereby realizing the pile's bearing capacity. The construction uses a spiral auger equipped with an STJ bit, installing the pile through a middle excavation utilizing the hollow part of the pile, and jetting cement milk with a high-pressure pump to create an enlarged bulb, resulting in low noise and low vibration. 【Features】 ■ Reliable construction of enlarged bulbs ■ High bearing capacity ■ Rapid construction ■ Low construction costs ■ Low earth-displacement method *For more details, please download the PDF or feel free to contact us.

Special Construction Method