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

A non-intact well and calculation method technology, applied in the direction of measuring devices, measuring flow/mass flow, liquid/fluid solid measurement, etc., can solve problems such as inability to meet project construction precipitation, project duration, and cost impact

Active Publication Date: 2012-09-19
CENT SOUTH UNIV
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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 displ

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

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Embodiment Construction

[0031] (1) Calculation method of drainage volume and drainage time in the process of single well water level drop

[0032] First, a single well is taken for analysis, such as figure 1As shown, after the precipitation, a precipitation funnel curve is formed around the well. Since the groundwater around the precipitation well is continuously replenished into the precipitation area, in order to ensure that the water level in the well is maintained at a certain stable water level S 1 , it is necessary to maintain a stable displacement Q(S 1 ), the precipitation funnel curve at this time is X 1 , when it is further necessary to reduce the water level in the well to S 2 , the precipitation funnel curve X is formed 2 , at this time, it is necessary to maintain the original stable displacement Q(S 1 ) on the basis of adding the displacement in the well, that is, increasing the precipitation funnel curve X 1 and X 2 displacement between.

[0033] like figure 1 As shown, the sma...

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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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Application Information

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IPC IPC(8): G01F1/00
Inventor 施成华彭立敏雷明锋杨伟超邓之友罗晶
Owner CENT SOUTH UNIV
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