A Calculation Model and Calculation Method for Early Warning of Water Inrush in Karst Tunnel
A calculation model, karst water technology, applied in computer-aided design, calculation, earthwork drilling and mining, etc., can solve problems such as poor accuracy, achieve accurate calculation, reduce calculation difficulty, and improve accuracy
Active Publication Date: 2020-10-16
CHONGQING JIAOTONG UNIVERSITY
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Problems solved by technology
[0003] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a water inrush early warning calculation model for karst tunnels, which solves the technical problem of poor accuracy caused by one-sided water inrush early warning in the prior art, and can improve the accuracy of early warning
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[0037] The present invention will be further described in detail below with reference to the drawings and preferred embodiments.
[0038] A karst tunnel water inrush warning calculation model, such as figure 1 As shown, the following data layers are included:
[0039] The data input layer is used to input the pressure of the karst water acting on the intermediate rock formations according to the pressure acquisition device; figure 2 As shown, the pressure acquisition device is set in the karst tunnel 1. The pressure acquisition device 3 includes at least three stress sensors 4 located on the same straight line and penetrating the middle rock layer 2 and extending into the karst water 5 (to ensure that the stress gauge can extend into the karst water. In, the advanced geological forecast is used to extract and detect the karst location and estimate its thickness. The borehole depth is greater than the estimated thickness, and the stress gauge penetrates the karst body from the boreh...
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The invention discloses a karst tunnel water inrush early-warning calculating model which comprises a data input layer for inputting the pressure intensity, detected by a pressure intensity collectingdevice, of karst water on a middle rock stratum, an even load calculating layer for calculating the even load of the karst water on the middle rock stratum, a stress calculating layer for simplifyingthe middle rock stratum into a simple supporting beam and calculating the tensile stress sigma t of the karst water on the middle rock stratum according to the structural mechanics and the even load,and a comparing layer for comparing the tensile stress sigma t generated by the middle rock stratum with the pre-measured allowable stress [sigma] of the middle rock stratum, showing that the middlerock stratum is in a safe state if sigma t is smaller than or equal to [sigma] and showing that the middle rock stratum is in an unsteady state and generating an early-warning signal if sigma t is larger than [sigma]. The invention further discloses a karst tunnel water inrush early-warning calculating method with the calculating model. The inrush early-warning is conducted by comprehensively considering the karst water pressure intensity and the tensile strength of the middle rock stratum, and accuracy can be improved.
Description
Technical field [0001] The invention relates to the technical field of karst tunnels, in particular to a karst tunnel water inrush early warning model, and also to a water inrush early warning calculation method. Background technique [0002] The tunnel involves traffic engineering (railway, highway tunnel), water conservancy and hydropower engineering (underground powerhouse, water conveyance tunnel) and other fields, and it is a controlling project of national infrastructure construction. After entering the 21st century, a large number of major infrastructure projects such as transportation projects and water conservancy and hydropower projects have been put on the construction schedule one after another, which greatly promoted the construction of tunnel projects. With the gradual implementation of the national science and technology strategy development plan, the traffic road network spreads across the mountainous and karst areas in the western part of the lofty mountains. "T...
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IPC IPC(8): E21F17/18G06F17/12G06F30/13
CPCE21F17/18G06F17/12G06F30/13G06F2119/06
Inventor 王林峰曾韬睿林钰丰
Owner CHONGQING JIAOTONG UNIVERSITY