Earthquake precursor soil fault evolved gas outlet observation well structure

Abstract

The invention relates to an earthquake precursor soil fault evolved gas outlet observation well structure which comprises a gas production mechanism, a gas collecting device and a gas guiding device,wherein the gas production mechanism and the gas collecting device are embedded in the underground. The gas production mechanism comprises a breathable layer and a breathable pipe, and the breathablepipe is vertically inserted into the breathable layer, a plurality of breathable holes are distributed in the pipe wall of the breathable pipe, and the top end of the breathable pipe is exposed abovethe breathable layer. The gas collecting device comprises a trumpet-shaped gas collecting cover, the large opening of the gas collecting cover faces downwards to cover the breathable layer, the smallopening of the gas collecting cover is connected with the breathable pipe and the protection pipe of the gas guiding device, a plurality of gas guiding pipes are arranged in the protection pipe, the top end of the protection pipe is covered with a sealing cover and is exposed out of the ground, the bottom ends of the gas guiding pipes are connected with a gas production floral tube, gas productionholes are distributed in the pipe wall of the gas production floral tube, the top ends of the gas guiding pipes penetrate through the sealing cover, and the gas guiding pipe are connected with the sealing cover through gas pipe joints. According to the invention, the gas production rate is high, the service life is long, the gas tightness is good, the stability and the reliability of soil fault evolved gas observation are improved.

Description

technical field [0001] The invention relates to the technical fields of geophysics and earthquake prevention and disaster reduction, in particular to an observation well structure for earthquake precursor soil fault gas escape, which provides stable and real soil fault gas escape for gas analyzers, and is mainly used in earthquake precursor gas observation points and stations. The construction of the network, together with gas analysis instruments, constitutes a complete gas observation system. Background technique [0002] Earthquakes bring about catastrophic disasters, causing serious damage to human life and property. Therefore, improving the scientificity and accuracy of earthquake prediction capabilities has great national strategic security and economic significance. Changes in the deep crust carried by underground fluids are the most sensitive to earthquake precursors. The underground gas contains rich physical and chemical dynamic information of the seismic source. T...

AI Technical Summary

Problems solved by technology

At present, the observation holes (wells) for gas escaping from soil faults are generally reconstructed from groundwater observation holes, which are not completely suitable for soil observation conditions and gas observation instruments, so there are low gas recovery rates, blockage of observation holes or gas leakage, etc. Defects affect the stability and reliability of soil fault gas observation

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