CN107944204A - Mountain tunnel Construction Risk Assessment method based on CAE finite element models - Google Patents
Mountain tunnel Construction Risk Assessment method based on CAE finite element models Download PDFInfo
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Abstract
The present invention provides a kind of mountain tunnel Construction Risk Assessment method based on CAE finite element models, mountain tunnel threedimensional model is established by ABAQUS CAE softwares, by mountain tunnel initial parameter tunnel cross-section form and size x, the grade y of country rock, the type z of lining cutting is input in finite element model, then FEM calculation is carried out by grid division and obtains tunnel vault, side wall, the displacement at the positions such as inverted arch, stress, draw stress time curve automatically by automatic software, displacement time curve, the curve can intuitively reflect the stress of Tunnel chamber interior walls everywhere, the situation of change of displacement, corresponding live risk source can accurately be just found if there is abnormal data, make Risk-warning, take positive remedial measure.
Description
Technical field
The present invention relates to Tunnel Engineering methods of risk assessment, and in particular to a kind of mountain ridge tunnel based on CAE finite element models
Road Construction Risk Assessment method.
Technical background
With the continuous social and economic development, the requirement to communications and transportation is also increasing, and building for mountain tunnel is also got over
Come more, how to control the construction risk of mountain tunnel is present urgent problem.Mountain tunnel in the construction process, meeting
Different grades of country rock, prominent mud gushing water, or even the various risks such as rock burst are run into, therefore, accurately assess the risk of mountain tunnel
The overall process for needing to construct to it carries out comprehensive analysis.Found by being retrieved to prior art literature, Chinese Patent Application No.
2015100547770, denomination of invention：Karst Tunnel gushing water is dashed forward the gradual risk dynamic assessment method of mud overall process, discloses one
Kind of Karst Tunnel gushing water is dashed forward the gradual risk dynamic assessment method of mud overall process, is comprised the following steps：(1) in tunnel surveying rank
Section, obtains the hydrogeological information of tunnel location and its neighbouring country rock, i.e. the environment that breeds of prominent water burst, each section of tunnel of understanding occur for tunnel
The risk status of residing geological conditions；(2) risk stratification value is calculated with factor weight vector according to expert analysis mode vector and carried out
Consistency check；(3) risk factors are introduced into the influence factor of risk assessment, consider pregnant dangerous environment and risk factors,
Carry out prominent water burst risk assessment, division tunnel is dashed forward the section distribution characteristics of water burst risk；(4) value of each index is combined into scene
Practice of construction situation is corrected in real time, to realize the dynamic evaluation of water bursting factor risk.As it can be seen that mountain tunnel risk is commented at present
Estimate method and risk profile is locally mainly carried out to some, and be that this method is realized by expert analysis mode, therefore be difficult pair
Overall constructing tunnel forms an accurate effective risk assessment.
Existing Karst Tunnel gushing water dash forward the gradual risk dynamic assessment method of mud overall process can only dash forward for gushing water mud this
The special content of kind forms risk assessment, and the risk complexity being likely to occur in mountain tunnel is various, and this method is not to entirety
Constructing tunnel form an effective risk assessment, can not meet the overall requirement of mountain tunnel risk assessment.
The content of the invention
The purpose of the present invention is that the deficiency for making up existing mountain tunnel Construction Risk Assessment, there is provided one kind is based on CAE
The mountain tunnel Construction Risk Assessment method of finite element model, can intuitively reflect Tunnel chamber interior walls stress everywhere, position
The situation of change of shifting, for the abnormal data of appearance, can accurately find the risk source at corresponding scene, make Risk-warning,
Take positive remedial measure.
The present invention adopts the technical scheme that：
Mountain tunnel Construction Risk Assessment method based on CAE finite element models, comprises the following steps：
Step 1：By CAE finite element softwares, mountain tunnel finite element model is established, it is soft especially by ABAQUS-CAE
Part establishes mountain tunnel threedimensional model, wherein, the initial parameter that model includes is：It can carry out the tunnel cross-section of direct editing
Form and size, country rock grade and lining style by varying material property into edlin；
Step 2：Tunnel stress deformation characteristic is calculated using mesh generation FInite Element, obtains tunnel vault, side
Wall, the displacement at inverted arch position, stress；
Step 3：By finite element model calculate monitoring point arrangement at stress and displacement data, and by these data with
Field monitoring data compare and analyze, and obtain the relation between the data and monitoring data of model calculating, and then extrapolate tunnel
Road cavern inner wall is not provided with the ess-strain situation at monitoring location；
Step 4：By stress, the strain data of software simulation gained, new database f is converted to by mathematical relationship
(x1), with reference to the Physical geographic outline data f (x2), geological condition data f (x3), ambient condition data f (x4) of mountain tunnel,
Formed a total Database, then with risk class function F (x)=span { f (x1), f (x2), f (x3), f (x4) } based on, adopt
The being associated property of data of total Database is analyzed with FineBI softwares, obtains stress time curve and displacement-time curve,
Risk class according to finally obtaining makes monitoring and warning.
Repeat step two arrives step 4, completes the risk analysis of tunnel of mountain tunnel construction overall process, reaches control tunnel
The purpose of risk.
Beneficial effects of the present invention：
The present invention can reflect the three-dimensional feature of mountain tunnel, and carry out with actual monitoring data by finite element modeling
After comparative analysis, all information of constructing tunnel can be shown with complete documentation and image, and daily dynamic wind can be automatically generated
Danger assessment table, operates easy to construction personnel or technical staff, eliminates the record work of Tunnel Engineering complicated construction information；
Commented using the risk of mesh generation finite element analysis technology, dynamic risk assessment and more monitoring item relevance evaluations
Estimate method, be disposed with stress time curve at monitoring point, displacement-time curve in conjunction with CAE software generation, pass through curve energy
It is enough intuitively to reflect Tunnel chamber interior walls stress everywhere, the situation of change of displacement, overcome traditional methods of risk assessment and obscure
The shortcomings that judge, all being associated property of big data are analyzed, judge a series of existing risks during engineering progress comprehensively
Source, and propose specific aim strategy, intelligence degree is very high；
This method can also be according to actual conditions, real time modifying computational methods, so that constantly improve risk assessment is accurate
Property, also more comprehensive and promptness.
Brief description of the drawings
Fig. 1 arranges sectional drawing for tunnel monitoring point；
Fig. 2 arranges top view for tunnel monitoring point；
Fig. 3 is three-dimensional model diagram；
Fig. 4 is stress time curve figure；
Fig. 5 is displacement-time curve figure；
In Fig. 1 and Fig. 2, A (a)：Measure vertical displacement and the stress at inverted arch arch bottom, B (b)：Measure the level of inverted arch arch springing
Displacement and stress, C (c)：Measure horizontal displacement and the stress of side wall, D (d)：Measure vertical displacement and the stress on inverted arch arch side, E
(e)：Measure vertical displacement and the stress of inverted arch vault；
In Fig. 4, path choosing is that from tunnel bottom surface midpoint to top surface midpoint, wherein S11 represents the direct stress of X-direction, S22
Represent the direct stress of Y-direction, S33 represents the direct stress of Z-direction, and S12 represents the shearing stress of X/Y plane (Tunnel inner wall)；
In Fig. 5, U1 represents X (horizontal) direction displacements, and U2 represents Y (vertical) direction displacement.
Embodiment
With reference to embodiment, the invention will be further described.
Embodiment
A kind of mountain tunnel Construction Risk Assessment method based on finite element model, mainly includes the following steps that：
Step 1：By CAE finite element software, the finite element model of mountain tunnel is established, can reflect its three-dimensional feature,
And three-dimensional model diagram (as shown in Figure 3) is drawn out, wherein, the initial parameter that model includes is：Tunnel cross-section form and size
X, country rock grade y, lining style z；It can carry out direct editing to x, and y and z are needed by varying material property into edlin；
After the completion of modeling, by inputting above-mentioned each initial parameter, you can the stress situation of change in simulation tunnel work progress；
Step 2：Tunnel stress deformation characteristic is calculated using mesh generation FInite Element, obtains tunnel vault, side
The displacement at the positions such as wall, inverted arch, stress；In the constructing tunnel stage, the step number in software represents different construction operating modes, works as engineering
Proceed to a certain stage, correspond to corresponding step number, you can obtain the tunnel stress and displacement cloud atlas of different construction stages, at the same time
Also the stress and shift value of tunnel surrounding rock body can be obtained, and with the progress immediate updating of engineering；
Step 3：As depicted in figs. 1 and 2, by finite element model calculate monitoring point arrangement at stress and displacement data,
And compare and analyze these data and field monitoring data, obtain the pass between the data and monitoring data of model calculating
System, and then the ess-strain situation that Tunnel chamber interior walls are not provided with monitoring location is extrapolated, reducing monitoring point
The stress of cavern's inner wall, deformation can also be understood while arrangement more comprehensive；It is false to take at vault exemplified by monitoring point
The data group such as measured by monitoring point is a1, a2, a3, a4, a5, a6, a7, and is calculated by software at corresponding monitoring location
The data obtained group is b1, b2, b3, b4, b5, b6, b7, there are multiple proportion between two groups of data, according to this relation with regard to that can learn
Live Tunnel chamber interior walls other do not set monitoring point position stress and shift value；
Step 4：By stress, the strain data of software simulation gained, new database f is converted to by mathematical relationship
(x1), with reference to the Physical geographic outline data f (x2), geological condition data f (x3), ambient condition data f (x4) of mountain tunnel,
Formed a total Database, then with risk class function F (x)=span { f (x1), f (x2), f (x3), f (x4) } based on, adopt
The being associated property of data of total Database is analyzed with FineBI softwares, corresponding prison is made according to the risk class finally obtained
Survey early warning.
Certain paths by choosing Tunnel chamber interior walls carry out stress-time, drafting (such as Fig. 4 of displacement-time curve
Shown in Fig. 5), analyzing the basic trend of curve and the characteristic of curve can predict which position of inner wall is weaker,
If stress sharply increases suddenly, illustrate that the disaster such as rock burst or prominent mud gushing water most probably occurs in the position, according to the change of stress
Change amplitude size makes corresponding Risk-warning and Disposal Measures.
The risk class is divided into four grades of blue, yellow, orange, red, and corresponding monitoring and warning is sent according to different grades,
Wherein blue early warning represents that same day construction monitoring data reach monitoring and warning requirement, but each side need to be reminded to pay close attention to the monitoring data
Continue changing condition；Yellow early warning represents that same day construction monitoring data reach monitoring and warning requirement, and comprehensive descision is acceptable wind
Danger, scene need to take the precautionary measures；Orange warning represents that same day construction monitoring data reach monitoring and warning requirement, and surrounding enviroment
Complexity, comprehensive descision is is reluctant to receive risk, and engineering is in unsafe condition, and scene need to take immediate steps；Red early warning table
Show that same day construction monitoring data reach monitoring and warning requirement, and without effective measures, comprehensive descision is unacceptable risk, engineering department
In the state of speedily carrying out rescue work.
Repeat step two carries out the risk analysis of tunnel of mountain tunnel construction overall process, reaches control tunnel to step 4
The purpose of risk.
Claims (1)
1. the mountain tunnel Construction Risk Assessment method based on CAE finite element models, it is characterised in that comprise the following steps：
Step 1：By CAE finite element softwares, mountain tunnel finite element model is established, is built especially by ABAQUS-CAE softwares
Vertical mountain tunnel threedimensional model, wherein, the initial parameter that model includes is：It can carry out the tunnel cross-section form of direct editing
And size, country rock grade and lining style by varying material property into edlin；
Step 2：Tunnel stress deformation characteristic is calculated using mesh generation FInite Element, obtain tunnel vault, side wall,
The displacement at inverted arch position, stress；
Step 3：By finite element model calculate monitoring point arrangement at stress and displacement data, and by these data with scene
Monitoring data compare and analyze, and obtain the relation between the data and monitoring data of model calculating, and then extrapolate Tunnel
Chamber interior walls are not provided with the ess-strain situation at monitoring location；
Step 4：By stress, the strain data of software simulation gained, new database f (x1) is converted to by mathematical relationship,
With reference to the Physical geographic outline data f (x2), geological condition data f (x3), ambient condition data f (x4) of mountain tunnel, formed
One total Database, then with risk class function F (x)=span { f (x1), f (x2), f (x3), f (x4) } based on, use
FineBI softwares analyze the being associated property of data of total Database, obtain stress time curve and displacement-time curve, root
Monitoring and warning is made according to the risk class finally obtained.
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Cited By (8)
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| CN110688806A (en) * | 2019-11-29 | 2020-01-14 | 清华四川能源互联网研究院 | Hydraulic tunnel risk assessment method and device and terminal equipment |
| CN111680350A (en) * | 2020-06-08 | 2020-09-18 | 中铁十四局集团大盾构工程有限公司 | Safety assessment method and device for shield tunnel and computer readable storage medium |
| CN111695783A (en) * | 2020-05-20 | 2020-09-22 | 中国路桥工程有限责任公司 | Overseas construction safety information network system based on Beidou |
| CN112487533A (en) * | 2020-11-30 | 2021-03-12 | 北京航空航天大学 | Full-section stress sensing method of tunnel structure health monitoring system |
| CN113487128A (en) * | 2021-05-21 | 2021-10-08 | 上海建工一建集团有限公司 | Construction early warning method |
| CN113505957A (en) * | 2021-05-21 | 2021-10-15 | 上海建工一建集团有限公司 | Construction early warning method considering risk factor coupling |
| CN115183965A (en) * | 2022-05-17 | 2022-10-14 | 中铁西北科学研究院有限公司 | Tunnel lining earthquake accumulated damage evaluation method suitable for vibration table test |
| CN115640996A (en) * | 2022-09-30 | 2023-01-24 | 中铁二十局集团有限公司 | Evaluation method for water inrush disaster of tunnel in water-rich complex stratum |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110688806A (en) * | 2019-11-29 | 2020-01-14 | 清华四川能源互联网研究院 | Hydraulic tunnel risk assessment method and device and terminal equipment |
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| CN111695783A (en) * | 2020-05-20 | 2020-09-22 | 中国路桥工程有限责任公司 | Overseas construction safety information network system based on Beidou |
| CN111680350A (en) * | 2020-06-08 | 2020-09-18 | 中铁十四局集团大盾构工程有限公司 | Safety assessment method and device for shield tunnel and computer readable storage medium |
| CN111680350B (en) * | 2020-06-08 | 2024-02-27 | 中铁十四局集团大盾构工程有限公司 | Safety evaluation method and device for shield tunnel and computer readable storage medium |
| CN112487533A (en) * | 2020-11-30 | 2021-03-12 | 北京航空航天大学 | Full-section stress sensing method of tunnel structure health monitoring system |
| AU2021273655B2 (en) * | 2020-11-30 | 2023-04-06 | Beihang University | Full-section force bearing sensing method of tunnel-structure health monitoring system |
| CN113505957A (en) * | 2021-05-21 | 2021-10-15 | 上海建工一建集团有限公司 | Construction early warning method considering risk factor coupling |
| CN113487128A (en) * | 2021-05-21 | 2021-10-08 | 上海建工一建集团有限公司 | Construction early warning method |
| CN115183965A (en) * | 2022-05-17 | 2022-10-14 | 中铁西北科学研究院有限公司 | Tunnel lining earthquake accumulated damage evaluation method suitable for vibration table test |
| CN115183965B (en) * | 2022-05-17 | 2023-08-08 | 中铁西北科学研究院有限公司 | Tunnel lining earthquake accumulated damage evaluation method suitable for vibrating table test |
| CN115640996A (en) * | 2022-09-30 | 2023-01-24 | 中铁二十局集团有限公司 | Evaluation method for water inrush disaster of tunnel in water-rich complex stratum |
| CN115640996B (en) * | 2022-09-30 | 2024-03-19 | 中铁二十局集团有限公司 | Assessment method for water-rich complex stratum tunnel gushing water disaster |
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