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The growth of using self-drilling anchor hollow bar in rock bolting, soil nailing and micropiling is rapid. Self-drilling anchor has been around for at least 40 years. It is developed for tunneling applications in weak or collapsing ground. Until today it is still used for the NEW Austrian Tunneling Method (NATM). However, Unlike the solid […]

Abstract The foundation of construction support continues to improve to meet the requirements of building and structures, since people began to build constructions. With the expansion of cities, there are not enough support areas near the grounds. Therefore, foundation is designed to transfer load to a suitable bearing earth layer. Buildings influenced by wind and

The story happen in Westeros is very popular in the worldwide. In the history of self drilling anchor bolting developing, same thing is happening. Let’s take a look at these real groups. The founder and former ruler: Atlas copco, first applied SDA Hollow Bars in railways in 1980’s. Basic structure & function: Rope Thread, Tensile Strength,

Origin: The technique of soil nailing began in the 1970s. It refers to the New Austrian Tunneling Method (NATM), which is a system for underground excavations in rock. It has been successfully utilized worldwide for excavation support and slope stabilization, and its use is growing rapidly.   Introduction： Most of the time, these anchors are