Dynamic risk obtaining method for tunnel large deformation disasters
A dynamic risk and acquisition method technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of failure to establish a quantitative risk assessment model for large deformation mechanism, failure to effectively use surrounding rocks, etc. , to achieve objective prediction results, improve practicability, and achieve the effect of updating
Pending Publication Date: 2019-09-06
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
[0008] In order to solve the above-mentioned problems in the prior art, the purpose of the present invention is to provide a dynamic risk acquisition method for large deformation disasters in tunnels, which is used to solve the problem in the prior art that a set of quantified risks that can reflect the mechanism of large deformation cannot be established. Problems in the formation of a dynamic and informatized risk assessment theory based on the risk assessment model and failure to effectively utilize the effective feedback of surrounding rock and support information during construction
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Embodiment 1
[0068] like figure 1 As shown, a dynamic risk acquisition method for large deformation disasters in tunnels includes the following steps:
[0069] S1: According to the historical data of large deformation disasters in tunnels, identify risk hazard factors;
[0070] S1.5: Based on the collected complete data of 8 typical cases of large deformation tunnels, a total of 101 sections of large deformation sections, and the existing standard definition and classification of large deformation, carry out the classification of tunnel large deformation disaster intensity, and obtain the tunnel large deformation Intensity grades of deformation hazards, as shown in Table 1 Surrounding Rock Extruded Large Deformation Intensity Grading Scheme, include:
[0071] No major deformation;
[0072] First-level large deformation: the range of estimated deformation is 15cm to 30cm, and the range of relative deformation is 3% to 6%;
[0073] Second-level large deformation: the range of estimated de...
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The invention belongs to the technical field of tunnel engineering, and discloses a dynamic risk acquisition method for tunnel large deformation disasters, which comprises the following steps: S1, identifying risk disaster-causing factors according to historical data of the tunnel large deformation disasters; S2, selecting a prediction index according to the risk disaster-causing factor, and establishing a probability prediction model according to the prediction index; S3, dynamically updating surrounding rock parameters by using a Bayesian method and a Markov random process method according to the prediction index and the exposed surrounding rock information of tunnel face excavation; S4, according to the surrounding rock parameters, the prediction indexes and the probability prediction model, carrying out posterior risk updating and acquiring a dynamic risk prediction result of the tunnel large deformation disaster. The method solves the problems that in the prior art, a set of quantitative risk evaluation model capable of reflecting a large deformation action mechanism cannot be established, effective feedback of surrounding rock and support information in the construction period cannot be effectively utilized, and a dynamic and informationized risk evaluation theory cannot be formed.
Description
technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a dynamic risk acquisition method for large deformation disasters in tunnels. Background technique [0002] With the development of tunnel engineering in the direction of deep burial and growth, the problem of engineering disasters has become increasingly prominent. Especially in the western mountainous area with complex geological environment, when the tunnel passes through the unfavorable geological combination sections such as high ground stress, soft rock (such as phyllite, mudstone, etc.), fault fracture zone, etc., the significant plastic deformation of the surrounding rock will lead to support Destroyed, delayed construction, brought huge losses. In view of the significant uncertainty in the geological conditions and construction process of the tunnel project, how to reasonably predict and evaluate the risk of large deformation, so as to carry out e...
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Login to View More IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 李天斌刘威军曾鹏陈语聂宇
Owner CHENGDU UNIVERSITY OF TECHNOLOGY