Luoyang Xinben Machinery Equipment Co., Ltd. is located in the beautiful ancient capital of the Nine Dynasties-High-tech Zone, Luoyang City, Henan Province, with superior geographical location and convenient transportation. Founded in 2005, the company specializes in R&D, manufacturing and sales of supporting materials, mining materials and equipment. It has strong scientific research strength and production capacity, diverse sales channels and excellent after-sales service. At present, the main products are: hollow anchor rods, water-expandable anchor rods, ordinary hollow grouting anchor rods, reverse circulation hollow grouting anchor rods, prestressed anchor rods, self-advanced hollow grouting anchor rods, expanding shell hollow grouting anchor rods A series of products such as grout bolts, combined hollow grouting bolts, and pipes.

　　Xinben recommends to outline the key points of construction control of hollow bolt engineering in tunnels:

　　1. The capital construction is prepared in advance. (1) Repair the piping of Feng Shui electrical equipment and test it to ensure that the piping is in a safe condition. (2) The hollow bolt on the spot meets the requirements. (3) Appropriate configuration of personal protective equipment for employees. Inspect the soft rock on the spot before construction to ensure the safety of the soft rock. Hollow bolt

　　2. Accurately measure the position. According to the design plan, the hole distance of the hollow bolt is clearly defined and marked, and the allowable hole distance error is ±100 mm. Hollow grouting anchor

　　3. Drilling equipment. (1) Check whether the drainage port of the hollow anchor bit is smooth, and if there is dirt, it should be removed immediately; (2) The hole distance of the hollow anchor positioning device is slowly drilled in until the deep level of the design scheme. The exposed length of the anchor is maintained at 10-15 cm. Hollow bolt manufacturers

　　4. Eliminate inspections. (1) After the hollow anchor rod is drilled into the deep layer of the design scheme, tap water and high pressure air to clean and drill. (2) Check whether the interval, length, and viewing angle of the hollow anchor rods meet the requirements, and re-drill the waste rock that is found to be insufficient.

　　5. Grouting. (1) The actual operation staff should wear rubber gloves, protective glasses and rubber boots when configuring the slurry. (2) The grouting is introduced through the middle hole of the rod body, and the upward and upward holes should be set with stop plugs and discharge holes as required, and the working pressure of grouting should be controlled in accordance with the safety regulations of the processing technology. (3) Cross-type grouting is selected, and the interval grouting is carried out. After the grouting is completed, the actual effect inspection will be carried out, but the grouting will be added immediately after the grouting. (4) During grouting, the actual operating personnel should not stand around the grouting port.

　　6. Acceptance status. (1) The length of the hollow anchor rod entry hole is not less than 95% of the design plan value, and the total number of installations meets the requirements; when the compressive strength of the cement mortar body is 10.0MPa, the hollow anchor bolt spacer nut can be combined with the painted concrete surface Close contact.

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