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Water-rich composite stratum tunnel water inflow prediction method

A technology of composite stratum and prediction method, which is applied in the direction of prediction, data processing application, instrument, etc., can solve the problems of low accuracy and no consideration of composite stratum, etc., and achieve the effect of improving accuracy

Active Publication Date: 2021-10-08
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology

[0005] However, these methods do not consider the situation of composite strata. In engineering practice, when the above-mentioned prediction method is used to predict the water inflow of tunnels in water-rich composite strata, even if the calculation result is more accurate Goodman’s empirical formula, the predicted water inflow The error with the measured water inflow is also more than 20%, and its accuracy is still not high

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  • Water-rich composite stratum tunnel water inflow prediction method
  • Water-rich composite stratum tunnel water inflow prediction method
  • Water-rich composite stratum tunnel water inflow prediction method

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Embodiment 1

[0096] There is an existing water resource allocation project, taking a certain section of the sub-tunnel of the project as an example: see image 3 , the length of the tunnel through the water-bearing body L = 400m; the number of layers of the tunnel through the composite stratum n = 2; the thickness of the first stratum t 1 =8.4m; the thickness t of the second stratum 2 =2.8m; the permeability coefficient K of the first stratum 1 =8.64×10 -3 m / d; the permeability coefficient K of the second formation 2 =8.64×10 -4 m / d; the radius of the equivalent circle of the tunnel cross-section r = 5.6m; the distance from the static water level to the center of the equivalent circle of the tunnel cross-section H = 78.5m; the above data can be obtained using existing technologies and will not be repeated here.

[0097] The distance d from the lower boundary of the first stratum to the equivalent round top of the tunnel cross section 1 = t 1 = 8.4m; the distance d from the lower boun...

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Abstract

The invention relates to the technical field of tunnel water inflow prediction, and provides a water-rich composite stratum tunnel water inflow prediction method. The predicted water inflow of a tunnel passing through a composite stratum is calculated according to the following formula: Qy is the predicted water inflow of the tunnel passing through the composite stratum, and the unit is m < 3 > / d; n is the layer number of the tunnel penetrating through the composite stratum; the weight is the weight of the water inflow in the ith stratum; qi is the water inflow of the i stratum, and the unit is m < 3 > / d; i is an integer greater than or equal to 1. The water-rich composite stratum tunnel water inflow prediction method provided by the embodiment of the invention is suitable for the rock stratum at any angle, when the water-rich composite stratum tunnel water inflow is predicted, the error between the predicted water inflow and the actually measured water inflow can be controlled within + / -12%, and compared with the prior art, the accuracy of the prediction result is greatly improved.

Description

technical field [0001] The invention relates to the technical field of forecasting water inflow in tunnels, in particular to a method for predicting water inflow in water-rich complex stratum tunnels. Background technique [0002] As a long and narrow underground building, the tunnel will inevitably pass through different hydrogeological and engineering geological environments during its construction. When the tunnel passes through the water-bearing section of the rock and soil mass, because the construction destroys the seepage conditions of the original groundwater, the tunnel body becomes an underground underground water discharge in different forms such as seepage, trickle, stream and large-scale water inrush. Corridors, resulting in flood disasters. [0003] During the construction of the tunnel, due to the existence of tunnel water gushing, not only the tunnel is filled, the equipment is submerged, but also the construction is brought to great difficulty. Therefore, i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/08
CPCG06Q10/04G06Q50/08Y02E10/20
Inventor 赵万强琚国全谭永杰陈伟张志强杨云郑长青张海波许鹏杜宇本范云鹤齐春华阳辜英晗周羽哲
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD