Hollow anchor rod reinforcing rapid construction method suitable for tunnel
A construction method and bolt technology, which are used in the installation of bolts, earth-moving drilling, mining equipment, etc., can solve problems such as low efficiency and long construction time for hollow bolts, so as to save construction costs, shorten construction time, and improve reinforcement. The effect of construction efficiency
Pending Publication Date: 2022-08-09
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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Problems solved by technology
[0007] The purpose of the present invention is to provide a fast construction method for hollow bolt reinforcement suitable for tunnels, so as to solve the technical problems of long construction time and low efficiency of existing hollow bolts
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Embodiment 1
[0037] Example 1: A rapid construction method for hollow bolts, in the construction of hollow bolts in a tunnel in a bidding section, see Figure 1-Figure 2 , set Φ25, 4.5m long hollow bolt, including the following steps:
[0038] Step 1: Before construction, use the total station to measure and stake out the bolt holes planned by the technical disclosure, and clean the surrounding rock surface, and start the mixing of the corresponding proportion of the slurry. According to relevant technical requirements, Φ42 bolt holes with a length of 4.5m are drilled at the stakeout point. After the holes are formed, high pressure air is introduced into the elbow steel pipes to remove slag and clear the bolt holes. This step takes 7min in total.
[0039] Step 2: See image 3 , screw the threaded connection sleeve that matches the hollow anchor rod body to the head of the rod body, fasten the rubber grouting tube with a buckle and set it on the threaded connection sleeve, start the grou...
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The invention discloses a hollow anchor rod reinforcing rapid construction method suitable for a tunnel. The technical problems that an existing hollow anchor rod is long in reinforcing construction time and low in efficiency are solved. The method mainly comprises the steps of drilling, deslagging and hole cleaning; measuring and calculating the volume difference delta V between the volume V1 of the anchor rod hole and the volume V2 of the hollow anchor rod body; grout with the volume of delta V is injected into the anchor rod hole, and before grouting of the anchor rod hole is completed, the portion, corresponding to the anchor rod hole, of the hollow anchor rod body is filled with grout; a hollow anchor rod is inserted into the corresponding anchor rod hole to the bottom; checking whether the slurry position in the anchor rod hole is full or not; and sealing the anchor rod hole. According to the rapid construction method for reinforcing the hollow anchor rod, the reinforcing construction procedure of the hollow anchor rod is omitted, the reinforcing construction time of the hollow anchor rod is greatly shortened, the material of the hollow anchor rod is further optimized, the construction cost is saved, convenience and rapidness are achieved, operability is high, and the corresponding technical specification requirements can be met.
Description
technical field [0001] The invention relates to the technical field of tunnel reinforcement, in particular to a rapid construction method for reinforcement of hollow bolts suitable for tunnels. Background technique [0002] As a fixed part, the bolt has been widely used in tunnel support, rock and soil slope support, foundation pit support and dam support and other reinforcement projects. The tensile capacity of the soil is far lower than the insufficient compressive capacity. [0003] The hollow bolt reinforcement construction process currently used in tunnel engineering is relatively complex, including: bolt hole placement, bolt hole drilling, rod body installation, grout stopper, exhaust pipe installation, grout mixing, grouting machine inspection And grouting, bolt grouting fullness inspection (the grout is discharged from the exhaust hole, that is, the grouting is full), seal, install the backing plate and bolts. [0004] In TB / T 3209-2008, "Technical Conditions for H...
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IPC IPC(8): E21D20/02
CPCE21D20/021
Inventor 白亮朱道君徐鹏祖徐鹏飞徐海峰王斌邓文学倪泽武颜仁富梁佳洲张颖李洪建耿超韩愈晁阳朱晓亮陈昌华杨正泽刘雕
Owner CHINA RAILWAY TUNNEL GROUP CO LTD