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Hydrogeological parameter measuring method based on circular fixed water level boundary unsteady flow pumping with finite size

An unsteady flow, hydrogeological technology, applied in measurement devices, soil material testing, suspension and porous material analysis, etc.

Pending Publication Date: 2020-03-06
HOHAI UNIV
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Problems solved by technology

[0007] Purpose of the invention: In order to overcome the problem that the application of hydrogeological parameter measurement in the unsteady flow pumping test of the unsteady flow pumping test of the unsteady flow well using the circular constant head boundary is limited, and to provide a circular constant head boundary definition based on the limited scale. The hydrogeological parameter determination method for the unsteady flow pumping test of the unsteady flow pressure complete well, which eliminates the influence of the limited scale on the calculation of the hydrogeological parameters and improves the calculation accuracy

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  • Hydrogeological parameter measuring method based on circular fixed water level boundary unsteady flow pumping with finite size
  • Hydrogeological parameter measuring method based on circular fixed water level boundary unsteady flow pumping with finite size
  • Hydrogeological parameter measuring method based on circular fixed water level boundary unsteady flow pumping with finite size

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Embodiment Construction

[0050] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0051]In this embodiment, constant flow unsteady flow pumping test is carried out indoors. Taking the indoor horizontal fissure model as an example, a circular water tank with an inner radius of 200 cm is constructed by using a circular fissure aquifer system, and a radius of 200 cm is constructed in the circular water tank. 170cm, 28cm high cement cylindrical base, two pressure cells are arranged in the cylindrical base to measure the size of the overlying load, a tube well with an inner diameter of 8cm is arranged in the middle of the cylindrical base, and piezometric tubes are arranged around the tube well. Place a geotextile with a thickness of about 0.5cm on the cylindrical base, then cover the geotextile with a layer of plastic paper, pour a 55cm thick cement platform on it, and use the water conductivity of the geotextile to simulate the ...

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Abstract

The invention discloses a hydrogeological parameter measuring method based on a circular fixed water level boundary constant flow artesian fully penetrating well unsteady flow pumping test with a finite size. The method comprises the following steps: establishing a standard curve of the circular fixed water level boundary constant flow artesian fully penetrating well unsteady flow pumping test through mathematical transformation according to a circular fixed water level boundary constant flow artesian fully penetrating well unsteady flow formula; drawing an s-t measured curve; placing the measured curve onto the standard curve, performing relative displacement when corresponding coordinate axes are parallel to each other, until the two curves overlap; selecting a random matching point, marking a corresponding coordinate value of the matching point, and calculating a permeability coefficient and a storage coefficient of a water-bearing stratum. According to the method, a hydrogeologicalparameter of the water-bearing stratum is determined by using a wiring method, and the permeability coefficient and the storage coefficient of the water-bearing stratum can be calculated simultaneously. Because unsteady flow pumping test data is used, an obtained calculation result is high in precision. The method has a very good application promotion value.

Description

technical field [0001] The invention belongs to the technical field of hydrogeological parameter measurement, and in particular relates to a hydrogeological parameter measurement method based on an unsteady flow pumping test of a circular constant head boundary, constant flow and pressure-bearing complete well with a limited scale. Background technique [0002] Hydrogeological parameters are very important parameters for the study of groundwater movement in rock and soil. Many methods for determining hydrogeological parameters have been proposed in the field of hydrogeology over the years. The purpose of these methods is to better, faster, and More accurate determination of hydrogeological parameters. However, in the research process of various new methods, the pumping test is regarded as the most effective, reliable and commonly used basic method that can be compared with the new test method. [0003] Usually, in order to verify the applicability and accuracy of various ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N33/24
CPCG01N15/0826G01N33/24
Inventor 赵燕容周志芳戎荣吴绍明陈峰吕培李猛张子民魏裕丰
Owner HOHAI UNIV
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