Thick loose rock-soil layer bottom water injection sedimentation deformation analog device and method

Abstract

The invention discloses a thick loose rock-soil layer bottom water injection sedimentation deformation analog device and method. The thick loose rock-soil layer bottom water injection sedimentation deformation analog device is characterized in that the two ends of a model barrel of the device are connected to flanges, and the two sides of the model barrel are connected to a water drainage flange and a pressure measuring pipe; a constant-pressure water injection pump is connected to a water source, the other end of the constant-pressure water injection pump is connected to a flowmeter, the other end of the flowmeter is connected to a water injection pipe which is connected to a water injection floral pipe in the model barrel, the bottom of a cavity is connected to a perforated plate, an optical cable is connected to a fiber grating sensor, and the other end of the optical cable is connected to a fiber grating demodulator, a computer and remote transmission equipment. The sedimentation analog method comprises the steps that the constant-pressure water injection pump is used for injecting water so as to cause the sedimentation and the deformation of a thick loose rock-soil layer, a light source in the demodulator is applied to the sensor, the demodulator is used for converting an optical signal returned by the sensor into a wavelength value and sending the wavelength value to the computer, the wavelength drift distance is calculated, and the wavelength value is converted into an internal stress value of the thick loose rock-soil layer. The thick loose rock-soil layer bottom water injection sedimentation deformation analog device has the advantages of being complete in monitoring, high in testing flexibility, repeated in manufacturing and wide in suitability for the research of a sedimentation problem of coal mines, foundation ditches, side slope roads and railways, and the wireless data transmission can be realized.

Description

technical field [0001] The invention relates to the law of seepage and deformation of an aquifer at the bottom of a thick loose rock and soil layer through a seepage parameter control instrument, an optical fiber grating strain monitoring and data transmission equipment, and specifically relates to a water injection settlement deformation simulation device and a settlement simulation method at the bottom of a thick loose rock and soil layer. Background technique [0002] Subsidence is a common geological phenomenon. Its slow and long-term evolution will become a geological disaster in severe cases, threatening the use of structures and the safety of people's lives and property, and forming social hazards. Large-scale exploitation of underground resources (including groundwater, oil, natural gas and coal) and large-scale engineering construction are the main causes of land subsidence, such as overlying rock and surface subsidence caused by mining mining, stratum subsidence ca...

AI Technical Summary

Problems solved by technology

However, these sensors still have shortcomings such as moisture-proof, waterproof, and anti-interference performance, and cannot realize distributed measurement.

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