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A grouting construction method for rapidly tensioning anchor cables

A construction method and anchor cable technology, which is applied in the direction of earth drilling, bolt installation, mining equipment, etc., can solve problems such as tunnel instability, tunnel scrapping, and long grouting time, and achieve good grouting effect, quality, and operation The process is simple and practical, and the effect of good social benefits

Active Publication Date: 2019-06-28
THE 4TH ENG OF CHINA RAILWAY 5TH ENG GROUP +1
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AI Technical Summary

Problems solved by technology

However, when the long-span section of the tunnel has the characteristics of large section, weathered rock, and developed rock fissures, the stability of the surrounding rock during tunnel construction is the biggest technical problem faced by the construction of the long-span section tunnel. Therefore, the anchor cable prestressing needs to be carried out in time. , in order to achieve the rapid closure of the tunnel reversing, if the tunnel is not reinforced in time after excavation, it is easy to cause the tunnel to become unstable and collapse, which greatly increases the safety risk of tunnel construction, causes great economic losses, and even leads to the scrapping of the tunnel
[0003] However, in the existing anchor cable prestressing construction process, the anchor cable grouting is easy to be not dense, and the grouting time is longer, resulting in the tunnel not being closed for a long time and easily leading to the instability of the tunnel

Method used

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  • A grouting construction method for rapidly tensioning anchor cables
  • A grouting construction method for rapidly tensioning anchor cables

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Embodiment Construction

[0031] see figure 1 and figure 2 , the grouting construction method of the fast-setting high-strength fast-tensioning anchor cable provided by the invention comprises the following steps:

[0032] 1. Anchor cable drilling: Drill anchor cable holes at the position where the surrounding rock of the tunnel needs to be reinforced.

[0033] 2. Anchor cable installation: install the anchor cable in the anchor cable hole, specifically: bind the first grouting pipe A, the second grouting pipe B, the first exhaust pipe C and the second exhaust pipe D The anchor cable bundle is advanced into the anchor cable hole, and the anchor section and the free section are determined.

[0034] The first grouting pipe A, the second grouting pipe B, the first exhaust pipe C and the second exhaust pipe D are all arranged in the anchor cable hole and communicated with the outside. Wherein, the first grouting pipe A, the second grouting pipe B and the first exhaust pipe C all pass through the free s...

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Abstract

The invention relates to a grouting construction method for quickly hardening, high strength and fast tensioning anchor cables. A anchor cable grouting process in the construction method is that grouting is carried out in anchor cable holes provided with anchor cables, free sections of the anchor cable holes are penetrate through a first grouting pipe, a second grouting pipe and a first vent pipewhich stretch into an anchorage section, a second vent pipe stretches into the hole bottoms of the anchor cable holes, and the second vent pope, and the lengths of second grouting pipe, the first grouting pipe and the first vent pipe stretching into the anchor cable holes are shortened in order. The anchor cable grouting process comprises the following steps that S11, sulfur-aluminum cement is prepared; S12, hole sealing and grouting of the free sections are carried out through the first grouting pipe; S13, the anchorage section is grouted through the first grouting pipe and the second grouting hole sequentially; and S14, the grouting effect of the anchor cables are tested. According to the grouting construction method for quick hardening, high strength and fast tensioning anchor cables, the grouting can be completed at one time, good grouting effect and quality are ensured, and the purpose of improving construction efficiency by rapidly tensioning anchor ropes is achieved.

Description

technical field [0001] The invention belongs to the technical field of tunnel reinforcement construction, and in particular relates to a grouting construction method for quick-setting high-strength fast-tensioning anchor cables. Background technique [0002] Prestressing is widely used in bridge engineering, railway engineering, highway engineering, electric power engineering, water conservancy engineering and geological engineering. However, when the long-span section of the tunnel has the characteristics of large section, weathered rock, and developed rock fissures, the stability of the surrounding rock during tunnel construction is the biggest technical problem faced by the construction of the long-span section tunnel. Therefore, the anchor cable prestressing needs to be carried out in time. , in order to achieve the rapid closure of the tunnel reversing, if the tunnel is not reinforced in time after excavation, it is easy to cause the tunnel to become unstable and collap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D20/00E21D20/02
CPCE21D20/003E21D20/021
Inventor 李雅筠唐新文蒋思罗都颢匡飞龙许琪刘臻武
Owner THE 4TH ENG OF CHINA RAILWAY 5TH ENG GROUP
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