Strong-strength extendable anchor rod
A high-strength, anchor technology, applied in the installation of anchors, mining equipment, earthwork drilling and mining, etc., can solve problems such as tunnel collapse, damage to initial support, and instability of tunnel structural systems, achieving simple structure and good reliability Effect
Active Publication Date: 2015-07-15
CHINA RAILWAY 21TH BUREAU GROUP
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Problems solved by technology
[0006] In order to solve the technical problems of excessive deformation of special geological surrounding rocks such as expansive surrounding rocks and weak surrounding rocks, primary support failure, tunnel structural system instability, and tunnel collapse, the purpose of the present invention is to provide a simple structure and good reliability. High-strength and extensible anchor rods; to form an effective support that is suitable for tunnels that are prone to large deformations such as expansive and weak surrounding rocks, allowing greater stress release in the tunnel structural system without losing stability
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[0021] Such as figure 1 Shown: a high-strength extensible anchor rod, including a stable rock mass anchoring end rod body 1, an extensible connecting pipe 2, a rod body 3 in the surrounding rock, a shell-shaped backing plate 4 and a nut 5; a stable rock mass anchoring end rod body 1 It is threadedly connected with the extensible connecting pipe 2, and the rod body 1 at the anchoring end of the stable rock mass is connected with the rod body 3 in the surrounding rock through a high-strength spring 6, see image 3 and Figure 4 : the extendable connecting pipe 2 is provided with a chute 21, see Figure 5 : the rod body 3 in the surrounding rock, the position corresponding to the chute 21 is provided with a pin 31, the pin 31 is slidably connected with the chute 21, the pin 31 slides in the chute 21, and the other end of the rod body 3 in the surrounding rock is installed with a shell-shaped pad Plate 4, nut 5 is installed on the rod body 3 in the surrounding rock, and the oute...
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The invention relates to a material for tunnel construction, in particular to a strong-strength extendable anchor rod, which comprises a stable rock mass anchorage end rod body, an extendable connecting pipe, an in-surrounding rock rod body, a shell-shaped base plate and a nut, wherein the stable rock mass anchorage end rod body is in threaded connection with the extendable connecting pipe, and is connected with the in-surrounding rock rod body through a strong-strength spring; the extendable connecting pipe is provided with a sliding chute; a dowel is arranged at a position, corresponding to the sliding chute, of the in-surrounding rock rod body, and is in sliding connection with the sliding chute; the shell-shaped base plate is arranged at the other end of the in-surrounding rock rod body; the nut is arranged at the outer end of the shell-shaped base plate on the in-surrounding rock rod body. The strong-strength extendable anchor rod is applied to a tunnel which is likely to be greatly deformed such as an expansive surrounding rock tunnel and a weak surrounding rock tunnel, surrounding rocks are allowed to be more greatly deformed, and meanwhile, sufficient resistance can be provided to enable the structure system of the tunnel to reach a stable state; the problems of damage to primary supports, destabilization of the structure system of the tunnel, collapse of the tunnel and the like caused by the great deformation of special geological surrounding rocks such as expansive surrounding rocks and weak surrounding rocks can be effectively solved.
Description
technical field [0001] The invention relates to materials used in tunnel construction, in particular to a high-strength and extensible anchor rod. Background technique [0002] At present, the tunnel construction method widely used in mountain tunnels in my country is the new Austrian method. Under the premise of utilizing the load-bearing capacity of the surrounding rock itself, the new Austrian method adopts techniques such as smooth blasting to carry out excavation. The primary support in the form of protection is adopted, and the secondary lining is applied after the tunnel structural system reaches stability. [0003] The main function of the primary support is to provide resistance to the surrounding rock, restrict the excessive deformation of the surrounding rock, maximize the bearing capacity of the surrounding rock itself, transform a certain thickness of the surrounding rock into a self-supporting arch, and effectively stabilize the surrounding rock . [0004] B...
Claims
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IPC IPC(8): E21D21/00
Inventor 邓兴安龚伦舒磊赵德刚冯建军仇文革
Owner CHINA RAILWAY 21TH BUREAU GROUP