Calculation method for displacement and displacement time in dynamic precipitation process of pressure-bearing partially penetrating well or well group

Abstract

The invention discloses a calculation method for displacement and displacement time in a dynamic precipitation process of a pressure-bearing partially penetrating well or well group. According to the calculation method, a specific calculation method for the displacement and the displacement time in a process of changing an initial water level of an underground water level of the pressure-bearing partially penetrating well or well group to a target water level is established according to the basic theory and basic law of underground water seepage on the basis of the existing calculation formula for daily displacement when a stable water level is kept in the precipitation process of the pressure-bearing partially penetrating well or well group by carrying out integration on a precipitation area. According to the calculation method, the current situation that the calculation of the displacement at a water level changing stage is dependent on experiences for a long time when the pressure-bearing partially penetrating well or well group is designed nowadays is changed, and the calculation and dynamic control on the displacement in the whole precipitation process of the pressure-bearing partially penetrating well or well group in engineering construction are realized.

Description

technical field [0001] The invention relates to a calculation method suitable for engineering construction dewatering and drainage, in particular to a calculation method for dewatering and drainage time in the process of dynamic dewatering of pressure-bearing incomplete wells or well groups. Background technique [0002] The purpose of foundation pit dewatering is to reduce the groundwater level below a certain depth requirement, which can satisfy the construction of the foundation pit structure without water interference, thereby reducing the difficulty of construction, and ensuring the excavation and structure of the foundation pit to the greatest extent. construction safety. [0003] At present, a lot of research has been done on the daily displacement when the precipitation is maintained at a certain stable water level at home and abroad. In terms of theory, according to the stable and unsteady seepage movement in the confined aquifer, the corresponding groundwater move...

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Problems solved by technology

However, there is no relevant calculation method at home and abroad for the daily precipitation and the time required for precipitation in the process of water level drop or recovery in the process of dewatering of uncompleted wells or well groups under pressure during engineering construction. On the basis of trial pumping, we will continue to adjust and finally determine the specific displacement, which will have a certain impact on the construction period and cost of the project.

[0004] Generally speaking, the daily precipitation during the dewatering process of pressure-bearing incomplete wells or well groups during engineering construction depends on the experience of engineering and technical personnel, and cannot meet the requirements of engineering construction dewatering.

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