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Multi-field coupling real-time sensing method for horizontal frozen soil

A permafrost, horizontal technology, applied in basic structure engineering, on-site basic soil survey, construction, etc., can solve problems such as unrepresentative pressure, and achieve the effects of convenient detection, improved strain monitoring accuracy, and high accuracy

Active Publication Date: 2012-09-19
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

This method requires multiple waterproof signal transmission cables in a frozen pipe, and each electronic sensor needs good waterproof and moisture-proof protection; the monitoring of frozen soil pressure is mainly carried out by the earth pressure cell buried in the soil layer. In this method, the earth pressure cell is only buried in the soil layer close to the segment, and the monitored earth pressure cannot represent the pressure in other parts of the soil layer

Method used

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  • Multi-field coupling real-time sensing method for horizontal frozen soil
  • Multi-field coupling real-time sensing method for horizontal frozen soil

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] Such as figure 1 As shown, the present invention provides a multi-field coupling real-time sensing method for horizontally frozen permafrost, the method connects fiber grating sensors in series, and attaches fiber grating sensors to the inner wall of a steel pipe and implants them into the formation. The method includes the following steps:

[0035] (1) Fiber Bragg grating sensors, steel pipes, cables and other equipment are in place;

[0036] (2) Fix the fiber grating sensor in the steel pipe, use numerical control technology to process the fixing blocks at both ends of the fiber grating sensor, and thread the steel pipe and the fiber grating sensor fixing block, and connect the fiber grating sensor and the steel pipe with bolts, The bolt holes on the steel pipe are welded dead by welding;

[0037] (3) Fix the optical cable jumper cab...

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Abstract

The invention belongs to the technical field of horizontal freezing construction monitoring, and provides a multi-field coupling real-time sensing method for horizontal frozen soil. The method serially connects fiber grating sensors, attaching the fiber grating sensors on the inner wall of a steel pipe, and embedding into ground. The method provided by the invention can effectively embed the fiber grating sensors into the horizontal frozen soil, and ensure good signals of the sensors, which provides necessary conditions for real-time continuous coupling monitoring of frozen soil temperature-stress during freezing process.

Description

technical field [0001] The invention belongs to the technical field of horizontal freezing construction monitoring, and in particular relates to a multi-field coupling real-time sensing method for horizontal freezing of permafrost. Background technique [0002] With the development of the economy, the process of urbanization is accelerating, and the scale of urban construction is expanding. A series of problems such as traffic congestion have appeared in many large cities, which seriously restrict the further development of social economy. There is an urgent need to build subways to improve the urban environment and relieve traffic pressure. Among them, the construction of the communication channel is the key process and risk point of the entire subway construction. During the construction process, the stability of the surrounding soil must be maintained to ensure that the underground pipelines and superstructures will not be affected. However, under some special geological...

Claims

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Application Information

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IPC IPC(8): E02D1/00
Inventor 丁烈云周诚叶肖伟王承山骆汉宾倪一清李勇军郭谱徐延召孙振川
Owner HUAZHONG UNIV OF SCI & TECH
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