Hollow bar anchor manufacturers carry out tensile test to ensure the self-drilling anchor rods are strong enough. The values are plotted on a coordinate graph – with strain elongation along the x-axis and stress, typically in MPa, along the y-axis. Figure 1 is a typical tensile train/ stress curve. Figure 2. Tensile capacity from …
As a manufacturer of self-drilling anchor bars, Onton always pays attention on the quality of products by learning from European factories. The normal length of self-drilling anchors is 3 to 9 meters. In order to increase the drilling depth, bolt connecting sleeves are applied. The coupling sleeves is formed with an internally thread …
Coupling for Anchor Bars, end chamfering process Read More »
Introduction: The core of the Onton Self-Drilling Anchor Bolt is a hollow, thick-walled, central drilling rod with a drill bit at the top. The system is modular, meaning that the most appropriate configuration can be put together to suit on-site circumstances and the forces that apply. The self-drilling anchor bolts are available in the steel grade S460NH …
Introdution Micropiles, sometime are called as minipiles, anchor piles or root piles, are widely used in foundations constructions. Especially for underpinning or emergency repairs, it is an effective method to provide reinforcement. Micropiles normally consist of high-strength, small-diameter threaded steel bar. After the injection of cement, micropiles can supply 1,000 tons strength and more.Meanwhile, …
Micropiles, Rock Drilling Rigs and Hollow Bar Anchors Read More »
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 reinforcing …
The raising standard of self-drilling anchor hollow bar Read More »
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 …
Micropile Reinforcing System and Corrosion Protection Read More »
The story happens in Westeros is very popular. It is the same in the history of self drilling anchor bolting development. Let’s take a look at these real groups. The founder and former ruler: Atlas copco,is the first company to use SDA Hollow Bars in railways in 1980’s. Basic structure & function: Rope Thread, …
A history of Self-Drilling Anchor (Game of Thrones version) Read More »
Origin The technique of soil nailing began in the 1970’s. It refers to the New Austrian Tunneling Method (NATM), which is a system about underground excavations in rock. It has been successful utilized worldwide for excavation support and slope stabilization, and its using grows rapidly. Introduction： In the past, anchor …
From Sep. 16th to Sep. 20th, 2019, PERUMIN 34 was held at Cerro Juli, Arequipa, Peru. Arequipa is the second most important city of Peru, and a hub of economic development in southern Peru. PERUMIN is a platform to present to line up the vision of the business leader, the academic, the civil society …
The 6th International Trade Fair (Bauma Conexpo India 2018) was held at India Expo Centre, Delhi NCR India from Dec. 11th to Dec. 14th, 2018. Building Material Machines, Construction Machinery, Construction Vehicles and Mining Machines etc. exhibited on this show. It attracted 700 companies from 26 countries presented their machines, products and innovative technologies for …
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