Tunnel surrounding rock monitoring method based on multifunctional intelligent anchor rod

A multi-functional, bolt technology, applied in the direction of bolt installation, foundation structure test, measurement force, etc., can solve the problems of inability to real-time monitoring, large random error, difficult operation, etc. simple craftsmanship

Inactive Publication Date: 2016-12-21
SOUTHEAST UNIV
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Problems solved by technology

These methods have always been common methods for the convergence of tunnel sections, but in practical applications, there are still shor...

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  • Tunnel surrounding rock monitoring method based on multifunctional intelligent anchor rod
  • Tunnel surrounding rock monitoring method based on multifunctional intelligent anchor rod
  • Tunnel surrounding rock monitoring method based on multifunctional intelligent anchor rod

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] Such as Figure 1-5 As shown, a multi-functional intelligent anchor rod based on long-gauge fiber gratings, including non-fused long-gauge-length multi-grating sensors 1, fiber grating multi-point temperature compensation auxiliary sensors 2, epoxy resin or planting glue 3, armored Optical cable 4 and soft plastic casing 5;

[0051] The non-welding long gauge length multi-grating sensor 1 and the fiber grating multi-point temperature compensation auxiliary sensor 2 are installed in the small groove opened in the longitudinal direction of the anchor rod 6, and are encapsulated by epoxy resin or embedding glue 3;

[0052] The non-fusion long gauge multi-grating sensor 1 includes a plurality of long gauge fiber grating sensing units connected in series in sequence, and the long gauge fiber grating sensing unit includes a sleeve, an optical...

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Abstract

The invention discloses a tunnel surrounding rock monitoring method based on multifunctional intelligent anchor rods. The tunnel surrounding rock monitoring method comprises the steps of: selecting a fracture surface to be monitored for monitoring according to analysis data such as geological conditions of a tunnel, the design of a supporting structure, the surrounding environment, the vulnerability and the like; converging the anchor rods distributed at different positions of the tunnel to a fiber bragg grating demodulator by means of leading-out armored optical fibers to form a monitoring sensor network; and connecting the fiber bragg grating demodulator (which is connected with the anchor rods) with a control computer, and constructing a surrounding rock monitoring system by means of monitoring system software. The tunnel surrounding rock monitoring method is simple and reliable in principle, can be used for testing axial forces and longitudinal distribution situations of the anchor rods to obtain a surrounding rod pressure of the tunnel, and can be used for calculating an deformation amount of surrounding rocks of an excavation surface or an deformation amount of surrounding rocks of a section. The tunnel surrounding rock monitoring method can be applied to the construction monitoring during the excavation of a tunnel adopting a new Austrian tunneling method, and can be applied to tunnel deformation and stability monitoring later during the operation period.

Description

technical field [0001] The invention relates to a bolt-based structural deformation monitoring method for tunnel, foundation pit and slope engineering, in particular to a monitoring method for surrounding rock based on a long-gauge fiber grating-based multifunctional intelligent bolt. Background technique [0002] The new Austrian tunnel construction method (hereinafter referred to as the new Austrian method) was proposed by the Austrian scholar L.V.RABCEWICZ (L.V.RABCEWICZ) in the 1950s. It is based on tunnel engineering experience and the theory of rock mechanics, and is carried out on the basis of practice. A new theory and new concept of tunnel engineering developed. The new Austrian method combines anchor rods and shotcrete as a construction method of the main support means. After many practical and theoretical studies in some countries, it obtained the patent right and officially named it in the 1960s. After that, this method has been developed very rapidly in many un...

Claims

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Application Information

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IPC IPC(8): G01B11/16G01L1/24E21D21/00E02D33/00
CPCE02D33/00E21D21/00G01B11/165G01L1/246
Inventor 赵学亮万春风夏呈
Owner SOUTHEAST UNIV
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