Mechanical rapid construction method of prestressed anchoring system in soft rock tunnel
A construction method and prestressing technology, which can be used in earth-moving drilling, bolt installation, mining equipment, etc., can solve problems such as the decline in construction quality of prestressed anchor cables/rods, reduce labor consumption and labor costs, and improve self-supporting ability, the effect of shortening the construction period
Active Publication Date: 2022-07-19
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
For manual construction of prestressed anchor cables / rods, the adverse effects caused by personnel factors in any process will lead to a decline in the construction quality of prestressed anchor cables / rods
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[0052] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. as a limitation of the present invention.
[0053] This embodiment discloses a mechanical rapid construction method of a prestressed anchoring system in a soft rock tunnel. During the entire construction process of this method, the mechanical equipment and the system are controlled to perform sequential or cross construction, which can control the construction timing and shorten the construction. Construction period, reduce labor consumption and labor costs, reduce construction difficulty, and ensure construction safety, and fully mechanized construction during construction can simplify processes and procedures, reduce rock deformation and shrinkage problems caused by changes in soft rock stress, and improve the self-bearing capacity of surroundin...
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The invention discloses a mechanical rapid construction method of a prestressed anchoring system in a soft rock tunnel, comprising the following steps: S1. automatic drilling; S2. rod body installation and stirring; S3. attachment installation; S4. tensioning and pre-tightening; S5. . Effective prestress detection; S6. Compensation tension; S7. Grouting. In the whole construction process of the present invention, construction operation and control are carried out through mechanical equipment and systems, which can control the construction timing and construction period, reduce labor consumption and labor costs, reduce construction difficulty, ensure construction safety, and fully mechanized construction in the construction process. It can simplify the process and process, shorten the construction period, reduce the deformation and shrinkage of the rock formation caused by the change of soft rock stress, improve the self-bearing capacity of the surrounding rock, and better control and improve the construction requirements through mechanical construction, ensure quality and safety, improve construction efficiency.
Description
technical field [0001] The invention relates to the technical field of soft surrounding rock construction, in particular to a mechanical rapid construction method of a prestressed anchoring system in a soft rock tunnel. Background technique [0002] As the center of gravity of traffic tunnel construction gradually develops in the direction of "long, large, deep and dangerous", the problems of tunnel construction caused by high ground stress environment have become more and more prominent. Among them, the large deformation of soft rock has seriously endangered the construction and operation safety of underground caverns. Under construction such as the Sichuan-Tibet Railway, the Muzhailing Highway Tunnel and the Central Yunnan Water Diversion Tunnel, large deformation of soft rock has occurred, and such problems have not been fully resolved. [0003] For the weak surrounding rock, with the excavation of the cavern, the radial stress of the surrounding rock mass is released / dis...
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IPC IPC(8): E21D20/00E21D20/02E21D21/00E21F17/00E21F17/18
CPCE21D21/0026E21D21/008E21D21/0093E21D20/003E21D20/02E21F17/00E21F17/18
Inventor 汪波王东魏夏鹏王振宇郭新新
Owner SOUTHWEST JIAOTONG UNIV