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Distributed roadbed settlement monitoring system and method for high-altitude permafrost regions

A settlement monitoring and distributed technology, applied in height/level measurement, measurement device, measurement of heat, etc., can solve the problems of insufficient durability and limited measurement range, and achieve the effect of large monitoring range and less damage.

Active Publication Date: 2017-03-29
CCCC FIRST HIGHWAY CONSULTANTS +1
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of limited measurement range and insufficient durability of existing subgrade settlement monitoring methods, and at the same time meet the requirements of the subgrade settlement monitoring in high-altitude permafrost regions on the working stability of the sensor system in extreme environments, and provide A distributed subgrade settlement monitoring system and method in high-altitude permafrost regions

Method used

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  • Distributed roadbed settlement monitoring system and method for high-altitude permafrost regions
  • Distributed roadbed settlement monitoring system and method for high-altitude permafrost regions

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specific Embodiment approach 1

[0015] Specific implementation mode one: combine figure 1 and figure 2 To illustrate this embodiment, a distributed subgrade settlement monitoring system in high-altitude permafrost regions described in this embodiment includes multiple longitudinal continuous steel strands reinforced distributed sensing optical fibers 1, multiple horizontal fixed-point polymer reinforced Distributed sensing optical fiber 2, multiple temperature measuring steel pipes 3, multiple fiber grating temperature sensors 4, fiber grating demodulator and Brillouin time domain analysis system 8;

[0016] The multiple longitudinal continuous steel strand reinforced distributed sensing optical fibers 1 are distributed in parallel, and the multiple horizontal fixed-point polymer reinforced distributed sensing optical fibers 2 are distributed in parallel, and the longitudinal continuous steel strand reinforced distributed sensing optical fibers 1 is perpendicular to the horizontal fixed-point polymer reinf...

specific Embodiment approach 2

[0020] Specific implementation mode two: combination figure 1 This embodiment is described. This embodiment is based on the roadbed settlement monitoring method of a distributed roadbed settlement monitoring system in high-altitude permafrost regions described in Embodiment 1. The method is:

[0021] Step 1. Embedding the longitudinal continuous steel strand reinforced distributed sensing optical fiber 1 and the horizontal fixed-point polymer reinforced distributed sensing optical fiber 2 below the roadbed surface;

[0022] Step 2. Use the Brillouin time-domain analysis system 8 to measure the strain distribution of the longitudinal continuous steel strand reinforced distributed sensing fiber 1 and the horizontal fixed-point polymer reinforced distributed sensing fiber 2, and use the fiber grating demodulator to obtain The temperature distribution of the fiber grating temperature sensor 4;

[0023] Step three, according to the formula Get the strain value of the sensing fib...

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Abstract

The invention discloses a distributed roadbed settlement monitoring system and method for high-altitude permafrost regions and relates to observing devices and methods in the field of civil engineering monitoring. The purpose is to solve the problems that according to an existing roadbed settlement monitoring method, the measurement range is limited, durability is poor, and working stability is poor under an extreme environment. Multiple longitudinal continuous steel strand reinforcement distributed sensor optical fibers are distributed in parallel, multiple transverse fixed-point type polymer reinforcement distributed sensor optical fibers are distributed in parallel, the longitudinal sensor optical fibers are perpendicular to the transverse sensor optical fibers, the transverse sensor optical fibers penetrate through temperature measurement steel tubes, fiber bragg grating temperature sensors are fixed to the outer walls of the temperature measurement steel tubes, a brillouin time domain analysis system is used for obtaining the stress distribution of the sensor optical fibers, a fiber bragg grating interrogator is used for obtaining the temperature distribution of the fiber bragg grating temperature sensors, and the volume of roadbed settlement is obtained according to obtained data. The distributed roadbed settlement monitoring system and method is suitable for monitoring roadbed settlement of the high-altitude permafrost regions.

Description

technical field [0001] The invention relates to an observation device and a measurement method in the field of civil engineering monitoring, in particular to a displacement measurement device and a measurement method for subgrade settlement in road engineering. Background technique [0002] Due to the extreme climate of the high-altitude permafrost area, the temperature in winter is low, and the water in the soil freezes to cause frost heave on the road. In summer, the temperature rises, the ice in the soil melts, and the long-term freeze-thaw cycle leads to serious roadbed settlement. Carry out long-term and large-scale settlement monitoring. [0003] At present, the method of monitoring subgrade settlement in engineering mainly adopts the method of drilling and measuring settlement. Firstly, a settlement hole is drilled in the soil, and settlement monitoring devices are arranged in the hole, such as settlement plate, settlement ring, settlement meter, laser range finder, C...

Claims

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Application Information

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IPC IPC(8): G01C5/00G01K11/32G01K11/3206G01K11/322
CPCG01C5/00G01K11/32
Inventor 张娟李惠徐金龙董永康周文松李金平袁堃
Owner CCCC FIRST HIGHWAY CONSULTANTS
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