Self drilling hollow anchor bolt system is a technological innovation supporting system which combines philosophy, theory, software, machine equipment, technology and standard together, applying to the supporting project in metro, road foundation and so on. It has the advantages of simple to construct and easy to operate.
Bolt is anchored in stratum, it can tightly link materials with stratum and then transfer tensile force, which makes reinforcement of stratum and itself. Compared with traditional anchoring methods, bolt anchoring technology has its own features.
Self drilling hollow anchor bolt ,as a new construction technology, has been applied in anti-wall and slope projects. It can solve technological problems of lose stratum.
Self drilling hollow anchor bolt can overcome the problems of difficult to drill holes in loose and broken soil. It can realize stabilization of side slope.
T76 soil nail is a safe, economic and high-efficient supporting method. It can tightly link materials with stratum and then transfer tensile force, which makes reinforcement of stratum and itself.
T103 anchor bolt is a kind of T thread hollow anchor bolt. Its friction force is about 2.4 times as wave thread bolt. It adopts high yielding strength and structural alloy steel, so it can’t be affected by fission.
T111 anchor bolt adopts hollow design, which is the passage of high-pressure blast, water and slurry. The overall standard thread has bigger binding area than the smooth ones, then it can improve the anchoring force.
It is a new type self drilling anchor bolt, which combines drilling, grouting and anchoring together.It is convenient, reliable and high-efficient. T thread can connect with drilling machine, rock bolting jumbo and grout injector.
It is a new T thread type. At the end of bolt, there is rectangular chamfer, which ensures that the end part is vertical and it can connect with coupling.The construction is simple and it suits for drilling and supporting in different geological conditions and projects.
One of the large diameter hollow anchor bolt applied for constructions of shallow buried parts of tunnel portal, sand, gravel, silt, and clay, and in soft to medium fractured rock formations.