CN110162932A - The calculation method of automatic monitoring slope stability based on finite element lattice - Google Patents
The calculation method of automatic monitoring slope stability based on finite element lattice Download PDFInfo
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Abstract
The calculation method of automatic monitoring slope stability provided by the invention based on finite element lattice, is divided into multiple blocks for side slope first, and side slope carries out limited lattice, determines the weight coefficient of each grid；Then it according to the difference of the weight coefficient of each grid, determines monitoring dot grid, and monitoring device is set at the grid position of monitoring point；The data of monitoring device monitoring are recycled to calculate the block stability analysis property coefficient of grid；And influence relationship factor of the block stability of a grid to entire slope stability is calculated according to weight coefficient, it will affect safety coefficient of the relationship factor as a grid relative to entire side slope；The average value of multiple safety coefficients is sought, finally to determine the safe condition of side slope.In such a way that side slope is integrally divided into limited grid, calculating is monitored with the stability to entire side slope in emphasis grid position setting monitoring device, reduce the quantity of monitoring device setting with save the cost, nor affects on the monitoring accuracy to entire side slope.
Description
Technical field
The present invention relates to slope stability monitoring technical fields, and in particular to the automatic monitoring side based on finite element lattice
The calculation method of slope stability.
Background technique
Chinese land area Zhongshan District area accounts for the gross area 69%, in the engineering constructions mistake such as railway, highway, water conservancy, electric power
Cheng Zhong, along with the excavation of a large amount of massif, along with the effect of the non-artificial factor such as earthquake, rainfall, the cunning so that side slope is collapsed
The accident on slope occurs again and again, will cause a large amount of life, property loss.
It is domestic at present that there are many side slope problems to combine traditional geological theory, numerical simulation, scene or laboratory test
Dynamic monitoring is carried out with fuzzy mathematics intelligent method and the deformation stability of side slope, explores many effective sides
The technology and methods of slope monitoring and Stability Evaluation are had studied more complete by analysis of slope deformation measurement data
Slide slope disease safety monitoring system and deformation dynamics trend forecasting method.Safety monitoring slope action include field survey,
Set up an office monitoring, design optimization, safety management etc., and since slope project is large number of, not only site inspection needs to put into a large amount of people
Power material resources, and the operator monitoring amount that sets up an office is big, is related to many aspects such as reconnoitring, be related to, construct and manage with regard to slope monitoring, and obtain
The monitoring data taken are various.From the multidate informations such as stress that slope monitoring obtains and deformation, due to the uncertainty of Rock And Soil,
Monitoring instrument is lack of standardization, installation environment is complicated etc. is installed, the monitoring data degree of roughness frequently resulted in is larger.
Patent CN105139585B discloses a kind of soil-slope dangerous situation intelligent early-warning forecasting procedure, comprising the following steps:
First is that scene setting rainfall monitoring station, embedding monolith lysimeter and displacement meter；Second is that acquiring the rainfall operating condition of side slope, soil in real time
Permeability and displacement data and transmit arrive Terminal Server Client；Third is that data formatization is handled；Fourth is that calculating rainfall operating condition, soil
The weight size of the data influences Side Slope Safety Coefficient such as permeability, slope-mass slide displacement；Fifth is that the rainfall operating condition of determining side slope day part,
Side slope soil infiltration coefficient and the relationship of deformation, displacement and safety coefficient, prediction soil-slope destroy time of origin.The invention from
Parameters and its passes with Side Slope Safety Coefficient such as the displacement of rainfall operating condition (rainfall intensity and rainfall change with time), slopes
System obtains the unstability time, and further handles the gained unstability time, with existing according between rainfall and landslide
The other angles such as relationship are different, have dynamic, the more accurate unstability time can be obtained, to further increase soil property side
The early-warning and predicting precision of slope unstable failure disaster.
There are the following problems in above-mentioned patent: first is that side slope is monitored as a whole, this mode is needed
It is laid with a large amount of monitoring device, monitoring cost is higher.Even if not accounting for a block but second is that side slope carries out lattice processing
Relationship of the body relative to entire side slope, does not account for the relevance problem between adjacent block yet, and monitoring accuracy is lower.
Summary of the invention
For the defects in the prior art, the present invention provides the automatic monitoring slope stability based on finite element lattice
Calculation method, not only can be reduced the laying quantity save the cost of monitoring device, but also can improve the accuracy of monitoring.
The calculation method of automatic monitoring slope stability provided by the invention based on finite element lattice, including following step
Suddenly,
S1, side slope is divided into multiple blocks, side slope carries out limited lattice, determines the weight coefficient of each grid；
S2, the difference according to the weight coefficient of each grid determine monitoring dot grid, and set at the grid position of monitoring point
Set monitoring device；
S3, the block stability analysis property coefficient that grid is calculated using the data of monitoring device monitoring；
S4, calculated according to weight coefficient influence relationship of the block stability of a grid to entire slope stability because
Son, the safety coefficient using the influence relationship factor as a grid relative to entire side slope；
S5, the average value for seeking multiple safety coefficients, to determine the safe condition of side slope.
Further, in S1 the weight coefficient of grid according to the number of limited lattice and the importance serial number of each grid
It determines.
Further, the data that monitoring device monitors in S3 include stress and the displacement of block；The sliding of default side slope
Direction, and each grid is numbered from top to bottom, export normal orientation stress balance relational expression, the normal direction of block are answered
Power, the sliding force summation relational expression of side slope, the skid resistance for cutting anti-intensity, block of block.
Further, if monitoring device monitors the unstressed variation of grid and change in displacement, the stability system of the grid
Number are as follows:Wherein SfiFor the skid resistance of grid, TiFor the sliding force summation of side slope.
Further, if monitoring device monitors that grid has stress variation, the coefficient of stability of the grid are as follows:Wherein, τfiFor the shearing strength of grid, τiFor shear stress summation.
Further, if monitoring device monitors that grid has change in displacement, the coefficient of stability of the grid are as follows:
Wherein SifReach for stick slide strips and cuts displacement, S under critical stateiDisplacement is cut for what stick slide strips monitored.
Further, further comprising the steps of:
S6, the geological conditions according between grid, groundwater condition, risk factor, construction environment, data-integrity determine
Incidence coefficient between each grid；
S7, the corresponding relevance grades of incidence coefficient are determined；
S8, to monitor dot grid as warning center point, the incidence coefficient based on peripheral point Yu warning center point determines periphery
The security level of grid.
As shown from the above technical solution, beneficial effects of the present invention:
1. side slope is divided into multiple by the calculation method of the automatic monitoring slope stability based on finite element lattice first
Block, side slope carry out limited lattice, determine the weight coefficient of each grid；Then not according to the weight coefficient of each grid
Together, it determines monitoring dot grid, and monitoring device is set at the grid position of monitoring point；Recycle the data meter of monitoring device monitoring
Calculate the block stability analysis property coefficient of grid；And the block stability of a grid is calculated to entire stability of slope according to weight coefficient
The influence relationship factor of property, will affect safety coefficient of the relationship factor as a grid relative to entire side slope；Finally seek
The average value of multiple safety coefficients, to determine the safe condition of side slope.By the side that side slope is integrally divided into limited grid
Formula is monitored calculating in emphasis grid position setting monitoring device with the stability to entire side slope, reduces monitoring device
The quantity of setting nor affects on the monitoring accuracy to entire side slope with save the cost.
2. the calculation method of the automatic monitoring slope stability based on finite element lattice, by introducing between adjacent block
Incidence coefficient determine the security level of periphery grid to monitor dot grid as warning center point, further enhance monitoring
Accuracy.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is that the present invention is based on the signals of the process of the calculation method of the automatic monitoring slope stability of finite element lattice
Figure.
Fig. 2 is the stress analysis schematic diagram of block in the embodiment of the present invention.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
It should be noted that unless otherwise indicated, technical term or scientific term used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.
Such as Fig. 1, the calculation method of the automatic monitoring slope stability based on finite element lattice includes the following steps,
Side slope is divided into multiple blocks by the first step, and side slope carries out limited lattice, determines the weight system of each grid
Number；Wherein, the weight coefficient of grid is determined according to the number of limited lattice and the importance serial number of each grid, specific to calculate
Formula are as follows:
∑ γ ij=1
In formula (1), γ-weight coefficient；The number for the finite element lattice that n- is divided；M- importance ranking number, m≤n.
Importance ranking m is empirically ranked up determination or staff by expert and is ranked up determination according to historical data.
Second step, the difference according to the weight coefficient of each grid determine monitoring dot grid, and in monitoring point grid position
Place's setting monitoring device；
Third step, the block stability analysis property coefficient that grid is calculated using the data of monitoring device monitoring；
The effects of not considering water, earthquake in the present embodiment only considers the side slope under statical condition, and monitors answering for block
Power and displacement；So to any block, stress as shown in Fig. 2, the glide direction of default side slope from right to left, and by each
Grid is numbered from top to bottom as 1~n, and the tilt angle of three blocks is respectively α from left to righti+1、α、αi-1, WiFor certainly
Weight, Pi-1For sliding force, BiFor length, NiFor skid resistance, σ is shear stress,For internal friction angle, CiFor frictional force.
Export following formula:
Normal orientation stress balance relational expression: Ni=Wicosαi+Pi-1sin(αi-1-αi)
The normal direction of block is answered are as follows:
Sliding force summation are as follows: Ti=Wisinαi+Pi-1cos(αi-1-αi)
Block cuts anti-intensity are as follows:
The skid resistance of block are as follows:
(1) if monitoring device monitors the unstressed variation of grid and change in displacement, the stability coefficient of the grid are as follows:Wherein SfiFor the skid resistance of grid, TiFor the sliding force summation of side slope.
(2) if monitoring device monitors that grid has stress variation, the coefficient of stability of the grid are as follows:
Wherein, τfiFor the shearing strength of grid, τiFor shear stress summation.
(3) if monitoring device monitors that grid has change in displacement, the coefficient of stability of the grid are as follows:Wherein Sif
Reach for stick slide strips and cuts displacement, S under critical stateiDisplacement is cut for what stick slide strips monitored.
4th step calculates influence pass of the block stability of a grid to entire slope stability according to weight coefficient
It is the factor, the safety coefficient using the influence relationship factor as a grid relative to entire side slope；Wherein, safety coefficient Fi
Calculating formula it is as follows: Fi=Ki × γi。
5th step, the average value for seeking multiple safety coefficientsSo that it is determined that side slope safety state.
As shown in the table, different according to the numerical value of safety coefficient, the safe condition of side slope can be varied.
| Safe condition | It is unstable | It is understable | It is basicly stable | Stablize |
| Safety coefficient | K < 1 | 1 < K < 1.05 | 1.05 < K < 1.15 | 1.15 < K |
6th step, the geological conditions according between grid, groundwater condition, risk factor, construction environment, data-integrity
Determine the incidence coefficient Aij between each grid；
The specific way for determining incidence coefficient is to be determined according to history big data: by slope geological condition, underground water
Condition, risk factor, construction environment data are stored in a database with corresponding side slope incidence coefficient；By two phases to be measured
The geological conditions of adjacent grid, groundwater condition, risk factor and construction environment keyword be input to large database concept, large database concept
The middle incidence coefficient for calculating two adjacent mesh to be measured.
7th step determines the corresponding relevance grades of incidence coefficient, shown in the following table of corresponding relationship:
| Relevance grades | Incidence relation | Incidence coefficient Aij |
| IV | High association | 0.75 Aij≤1 < |
| III | Highlights correlations | 0.5 Aij≤0.75 < |
| II | Moderate correlation | 0.25 Aij≤0.5 < |
| I | Minuent association | 0 Aij≤0.25 < |
8th step, to monitor dot grid as warning center point, the incidence coefficient based on peripheral point Yu warning center point determines
The security level of periphery grid.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.
Claims (7)
1. the calculation method of the automatic monitoring slope stability based on finite element lattice, it is characterised in that: include the following steps,
S1, side slope is divided into multiple blocks, side slope carries out limited lattice, determines the weight coefficient of each grid；
S2, the difference according to the weight coefficient of each grid determine monitoring dot grid, and prison are arranged at the grid position of monitoring point
Measurement equipment；
S3, the block stability analysis property coefficient that grid is calculated using the data of monitoring device monitoring；
S4, influence relationship factor of the block stability of a grid to entire slope stability is calculated according to weight coefficient,
Safety coefficient using the influence relationship factor as a grid relative to entire side slope；
S5, the average value for seeking multiple safety coefficients, to determine the safe condition of side slope.
2. the calculation method of the automatic monitoring slope stability according to claim 1 based on finite element lattice, special
Sign is: the weight coefficient of grid is determined according to the number of limited lattice and the importance serial number of each grid in S1.
3. the calculation method of the automatic monitoring slope stability according to claim 1 based on finite element lattice, special
Sign is: the data that monitoring device monitors in S3 include stress and the displacement of block；The glide direction of default side slope, and will be every
One grid is numbered from top to bottom, exports the downslide of normal orientation stress balance relational expression, the normal stress of block, side slope
Power summation relational expression, the skid resistance for cutting anti-intensity, block of block.
4. the calculation method of the automatic monitoring slope stability according to claim 3 based on finite element lattice, special
Sign is: if monitoring device monitors the unstressed variation of grid and change in displacement, the stability coefficient of the grid are as follows:Wherein SfiFor the skid resistance of grid, TiFor the sliding force summation of side slope.
5. the calculation method of the automatic monitoring slope stability according to claim 4 based on finite element lattice, special
Sign is: if monitoring device monitors that grid has stress variation, the coefficient of stability of the grid are as follows:Wherein,
τfiFor the shearing strength of grid, τiFor shear stress summation.
6. the calculation method of the automatic monitoring slope stability according to claim 1 based on finite element lattice, special
Sign is: if monitoring device monitors that grid has change in displacement, the coefficient of stability of the grid are as follows:Wherein SifFor item
Block slide strips, which reach, cuts displacement, S under critical stateiDisplacement is cut for what stick slide strips monitored.
7. the calculation method of the automatic monitoring slope stability according to claim 1 based on finite element lattice, special
Sign is: further comprising the steps of:
S6, the geological conditions according between grid, groundwater condition, risk factor, construction environment, data-integrity determine each
Incidence coefficient between grid；
S7, the corresponding relevance grades of incidence coefficient are determined；
S8, to monitor dot grid as warning center point, the incidence coefficient based on peripheral point Yu warning center point determines periphery grid
Security level.
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| CN111881612A (en) * | 2020-08-05 | 2020-11-03 | 武汉市政工程设计研究院有限责任公司 | Two-dimensional stress field inversion method and system for different weights of normal stress and shear stress |
| CN113742827A (en) * | 2021-09-03 | 2021-12-03 | 招商局重庆交通科研设计院有限公司 | Method for constructing highway slope monitoring network system based on finite difference analysis |
| CN114495434A (en) * | 2022-02-08 | 2022-05-13 | 北京寒武智能科技有限公司 | Landslide disaster critical-sliding prediction and forecast method |
| CN114582095A (en) * | 2022-03-16 | 2022-06-03 | 浙江电力建设工程咨询有限公司 | Remote slope safety monitoring data acquisition device and data analysis method |
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| CN111598406A (en) * | 2020-04-21 | 2020-08-28 | 长江勘测规划设计研究有限责任公司 | Quantitative evaluation method for block instability risk of high and steep slope |
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| CN111881612A (en) * | 2020-08-05 | 2020-11-03 | 武汉市政工程设计研究院有限责任公司 | Two-dimensional stress field inversion method and system for different weights of normal stress and shear stress |
| CN113742827A (en) * | 2021-09-03 | 2021-12-03 | 招商局重庆交通科研设计院有限公司 | Method for constructing highway slope monitoring network system based on finite difference analysis |
| CN114495434A (en) * | 2022-02-08 | 2022-05-13 | 北京寒武智能科技有限公司 | Landslide disaster critical-sliding prediction and forecast method |
| CN114495434B (en) * | 2022-02-08 | 2024-01-12 | 北京寒武智能科技有限公司 | Landslide hazard temporary slip prediction method |
| CN114582095A (en) * | 2022-03-16 | 2022-06-03 | 浙江电力建设工程咨询有限公司 | Remote slope safety monitoring data acquisition device and data analysis method |
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