Underground water seepage prediction method suitable for vertical shaft of multi-ring structure

Abstract

The invention discloses an underground water seepage prediction method suitable for a vertical shaft of a multi-circular-ring structure. The method comprises the following steps: acquiring hydrogeological conditions of the multi-ring structure vertical shaft and permeability coefficients of aquifers at the periphery of the multi-ring structure vertical shaft; a lining structure permeability coefficient and a grouting ring permeability coefficient of the periphery of the vertical shaft with the multi-circular-ring structure are determined respectively; analyzing the seepage influence radius of underground water in each aquifer on the periphery of the vertical shaft with the multi-ring structure; and predicting the water inflow and the total water inflow corresponding to each aquifer in the multi-ring structure vertical shaft and the lining external water pressure of the lining structure at different depths on the periphery of the multi-ring structure vertical shaft. Compared with results obtained by computer numerical calculation and simulation, the predicted water inflow of the corresponding aquifer in the multi-ring structure vertical shaft and the predicted water pressure outside the lining at different depths of the lining structure on the periphery of the multi-ring structure vertical shaft have good accuracy.

Description

technical field [0001] The invention relates to the technical field of prevention and control of underground water disasters in vertical wells, in particular to a groundwater seepage prediction method applicable to vertical wells with multi-ring structures. Background technique [0002] When shafts pass through underground aquifers, they face the problem of seepage of groundwater into the well. If it is an open well, the Chubuy formula can be used to predict the water inflow of the shaft. However, in actual situations, some large wells need to be poured with lining to ensure the stability of the well wall, and the lining structure is used to bear the external water pressure load. When the water inflow of the shaft is too large, a grouting circle must be set, that is, the water permeability of the aquifer around the shaft is reduced by grouting to reduce the water inflow; in addition, when the shaft passes through multiple aquifers, due to various Different hydrogeological ...

AI Technical Summary

Problems solved by technology

When the water inflow of the shaft is too large, a grouting circle must be set, that is, the water permeability of the aquifer around the shaft is reduced by grouting to reduce the water inflow; in addition, when the shaft passes through multiple aquifers, due to various Different hydrogeological conditions of aquifers also bring difficulties to seepage prediction

[0003] At present, with regard to shaft seepage, the existing technologies are generally aimed at open shafts, and there is no effective seepage prediction method for shafts with circular lining and grouting rings

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