CN108709532A - A kind of bevel edge Slope Stability Evaluation method of ladder-like jump deformation - Google Patents
A kind of bevel edge Slope Stability Evaluation method of ladder-like jump deformation Download PDFInfo
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- CN108709532A CN108709532A CN201810268080.7A CN201810268080A CN108709532A CN 108709532 A CN108709532 A CN 108709532A CN 201810268080 A CN201810268080 A CN 201810268080A CN 108709532 A CN108709532 A CN 108709532A
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- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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Abstract
The present invention relates to a kind of bevel edge Slope Stability Evaluation methods of ladder-like jump deformation, this method is fitted " the conversion deformation-time graph " of a reflection overall deformation situation according to the endpoint of actual monitoring deformation-time graph " ladder section ", and corresponding deflection in the corresponding period is determined during whole monitoring according to this curve, to establish its deformation velocity and acceleration formula.Binding time of the present invention and two, space different angle carry out comprehensive analysis, and temporal and spatial evolution is organically combined, from the macroscopically comprehensive deformation failure situation determined residing for slope.According to the size of deformation acceleration value and variation tendency and side slope macroscopic deformation situation is combined, is sentenced and is known slope stability and carry out two- level optimization early warning；The evaluation method, computational methods are simple, definite conception, as a result accurately, overcome existing computational methods either calculate it is cumbersome tediously long or the shortcomings that the local deformation stage can only be studied.
Description
Technical field
The present invention relates to hazards control fields, and in particular to it is a kind of it is ladder-like jump deformation bevel edge slope stability comment
Valence method.
Background technology
The early-warning and predicting on landslide is always the hot spot of Geological Engineering circle research, since side slope has very strong personal characteristics,
Its deformation evolution behavior with its residing for environmental condition and slopes geologic structure it is closely related, this be also landslide early-warning and predicting it is current
There are no the difficult points solved very well.Reservoir area of Three Gorges ancient slide deforms under the influence of reservoir level fluctuation and rainfall
Revealing ladder-like jump deformation characteristics, such slope deforming curve shape is generally alternately present in " ladder section " and " gentle section ",
And it is directed to such slope and land slide early-warning and predicting method, (such as deformation curve is cut for conventional slope stability detection and early warning pre-judging method
Line angle performance rate method and deformation catastrophic model stability status sentence knowledge and method for early warning etc.) be obviously not suitable for that there is " step-like " deformation
The side slope of feature.Especially in most cases the step-like step of slope deforming is often mistaken for side slope by government and engineering unit now
The omen of unstability, and then corresponding Forewarning Measures are taken, cause serious economic loss and society panic.In addition slope deforming is supervised
There are larger differences for measured data spatial and temporal distributions, the stable state identification difficulty of such side slope are more increased, in majority of case
Under, side slope deformation stability and disaster alarm can be only in the passive state looked around, when seriously affecting resolution and administering
The selection of machine.
Have studies have shown that the unstability early-warning and predicting method of side slope mainly has m- sequence method, slope deforming when single-point to add
Speed method, coefficient of stability method etc., as the creep three phases on the landslide of vegetarian rattan enlightening filial piety proposition are theoretical, Chinese patent
201310376844.1《Slope monitoring system based on deformation data and method》And 201710383639.6《A kind of side slope
Method for analyzing stability》Deng showing that mostly use research deformation-time graph a certain for the landslide method for early warning based on deformation acceleration
Three deformation stage acceleration value analysis of trend slope stability states in a " step ".The shortcomings that above method is：
Ladder-like deformed slope has the characteristics that " the gentle section " of " the increasing section suddenly " of rapid deformation and slow creep is alternately present, and often
The acceleration change trend of one " step " has local effect (local effect said herein refers in long-term monitoring process
The acceleration of " increasing section suddenly " can be very big, and " gentle section " acceleration very little, using the acceleration change of one " step "
Trend has significant limitation and discreteness come the stability for weighing bevel edge slope), it is not enough to really react the deformation of side slope
Situation, the unstable failure of side slope be often TERM DEFORMATION accumulation as a result, above method have when analyzing such deformation characteristics compared with
Big limitation.The ladder-like deformation characteristics based on side slope that the application proposes are fitted whole monitoring process deformation curve, analyze it
It deforms acceleration and combines side slope macroscopic deformation situation, can not only more comprehensively sentence the stability for knowing side slope, and can
Long term monitoring data and the advantage of site inspection are played, avoids calculating the disadvantages such as cumbersome, result is inaccurate.
Invention content
In order to solve the above technical problems, the present invention proposes a kind of bevel edge Slope Stability Evaluation side of ladder-like jump deformation
Method, this method are fitted one according to the endpoint of actual monitoring deformation-time graph " ladder section " and reflect " turning for overall deformation situation
Transformation shape-time graph ", and corresponding deflection in the corresponding period is determined during whole monitoring according to this curve, from
And establish its deformation velocity and acceleration formula.Binding time of the present invention and two, space different angle carry out comprehensive point
Analysis, temporal and spatial evolution is organically combined, from the macroscopically comprehensive deformation failure situation determined residing for slope.Accelerated according to deformation
The size and variation tendency of angle value simultaneously combine side slope macroscopic deformation situation, sentence and know slope stability and to carry out two- level optimization pre-
It is alert；A kind of bevel edge Slope Stability Evaluation method of ladder-like jump deformation provided by the invention, computational methods are simple, and concept is bright
Really, as a result accurately, overcome existing computational methods either calculate it is cumbersome tediously long or the shortcomings that the local deformation stage can only be studied；
The method of the present invention can apply to the engineering fields such as mine, water conservancy and hydropower, bridge, be suitable for the side with " ladder-like " deformation characteristics
Analysis of Stability of Front Slope, the bevel edge slope especially influenced by library water fluctuation and extensive excavation, has a good application prospect.
The technical scheme is that：
A kind of bevel edge Slope Stability Evaluation method of ladder-like jump the deformation, " ladder based on slope deforming-time graph
Shape " feature determines the endpoint of curve each " ladder section ", is then fitted a whole slope deforming-according to above each endpoint
Time graph, and then the deformation velocity and acceleration of the deformation-time graph whole process are calculated, it draws deformation velocity, accelerate
Degree-time graph, and side slope macroscopic deformation is combined to destroy situation, sentence and knows slope stability and carry out early-warning and predicting；
Include the following steps：
The first step：According to monitoring data, slope deforming-time graph is drawn out using mapping software, and determine in curve
The endpoint of each " ladder section "；
Second step：Each endpoint fitting in the first step is connected into transition shift-time graph；
Third walks：The time t of each monitoring cycle of transition shift-time graph is determined on the basis of second stepiAnd its it is right
The deflection d answeredi, i i-th of monitoring cycle of expression, i=1,2,3 ...；
4th step：According to the result of third step according to the change in formula (1) calculating each monitoring cycle of transition shift-time graph
Shape speed；
5th step：Using deformation velocity as the longitudinal axis, the time is horizontal axis, draws scatter plot according to four-step calculation result, then
Slope deforming speed-time curve figure is obtained by smoothing processing；
6th step：It is calculated in each monitoring cycle using slope deforming speed-time curve figure in the 5th step and deforms acceleration；
7th step：To deform acceleration as the longitudinal axis, the time is horizontal axis, and scatter plot is drawn according to the calculating data of the 6th step,
Then slope deforming acceleration-time plot is obtained by smoothing processing, and corner position is accurately positioned；
8th step：On the basis of seven steps, the forward and backward phase acceleration of acceleration-time plot inflection point is deformed according to gained
It is worth variation tendency, the preliminary stability for judging side slope；
9th step：On the basis of eight steps, situation is destroyed in conjunction with side slope macroscopic deformation, carries out side slope early warning anticipation classification.
Compared with the prior art, the beneficial effects of the invention are as follows：
1, a kind of bevel edge Slope Stability Evaluation method of ladder-like jump deformation of the present invention, by the institute of ladder-like deformation curve
There is the endpoint of " ladder section " to be fitted to form one ' conversion deformation-time graph ', then obtains ' conversion deformation-time on the basis of this
Curve ' deformation acceleration-time graph (note：Deformation velocity-time graph is a middle transition curve), added according to deformation
The inflection point fore-aft acceleration value variation tendency of speed-time curve, the preliminary stability for judging side slope, becomes in conjunction with side slope macroscopic view
Shape destroys situation, carries out side slope early warning anticipation classification.This method is formed based on whole curve, is suitable for all with " platform
The side slope of scalariform " deformation characteristics, it is applied widely, it completely can be to avoid local effect；
2, this method analyzes the size for deforming acceleration value and variation tendency and combines side slope macroscopic deformation situation, sentences knowledge
Slope stability simultaneously carries out forecasting and warning classification, and numerous scholars analyze merely the office of a certain deformation stage acceleration before having broken
It is sex-limited, the range of conventional Landslide Stability detection and early warning criterion is jumped out, side slope early alarming and forecasting method is enriched；
3, this method is directed to the deformation that " the gentle section " of " increasing section suddenly " and slow creep with rapid deformation is alternately present
The side slope of feature and propose, calculate simple, as a result reliably, facility provided for scientific research.
In order to make the purpose of the present invention, technical solution is clearer, and the present invention provides following description of the drawings：
Description of the drawings
Fig. 1：Slope deforming-time graph and its ' conversion deformation-time graph ' figure；
Fig. 2：Slope deforming speed-time curve figure；
Fig. 3：Slope deforming acceleration-time plot；
In figure, 1, slope deforming-time graph, 2, conversion deformation-time graph, δ, face sliding early warning value.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings and embodiments.
A kind of bevel edge Slope Stability Evaluation method of ladder-like jump deformation of the present invention, includes the following steps：
The first step：According to long term monitoring data, slope deforming-time graph is drawn out using mapping software, and determine bent
The endpoint of " ladder section " each in line；
Second step：Each endpoint fitting in the first step is connected into transition shift-time graph；
Third walks：The time t of each monitoring cycle of transition shift-time graph is determined on the basis of second stepi(i=1,
2,3 ... n) and its corresponding deflection di(i=1,2,3 ... n), and i indicates i-th of monitoring cycle, and n is integer；
4th step：The deformation velocity in each monitoring cycle of transition shift-time graph, meter are calculated according to the result of third step
Calculating formula is；
5th step：Using deformation velocity as the longitudinal axis, using the time as horizontal axis, scatter plot is drawn according to four-step calculation result, so
Afterwards slope deforming speed-time curve figure is obtained by smoothing processing；
6th step：Deformation acceleration a is calculated using the slope deforming speed-time curve figure obtained in the 5th stepi, meter
Calculating formula isIn formula：viIndicate the deformation velocity of i-th of monitoring cycle, tiIndicate i-th
The monitoring time of a monitoring cycle；
7th step：To deform acceleration as the longitudinal axis, using the time as horizontal axis, deformation acceleration-time scatter plot is drawn, then
Slope deforming acceleration-time plot is obtained by smoothing processing, and capture corner position is accurately positioned；
8th step：On the basis of seven steps, is calculated by data analysis and tentatively judge the stability of side slope, if inflection point early period,
Slope deforming acceleration value illustrates that side slope is in steady-state deformation state in 0 or so fluctuation；If inflection point later stage acceleration value gradually increases
Add and even increase suddenly, then illustrates that slope stability drastically declines, it is possible to come down；If inflection point later stage acceleration gradually subtracts
It is small or even become negative value, then illustrate that deformation tends towards stability, slope stability improves.
9th step：On the basis of eight steps, illustrate slope stability if slope does not occur tension fracture in inflection point early period；
If the tensile crack being discontinuously distributed occurs in side slope, the warning level of side slope is to pay attention to grade, and early warning color is blue；According to long-term
Analysis on monitoring data simultaneously combines slope macroscopic deformation situation, and determine the Slope acceleration faces sliding early warning value.After inflection point
Phase deformation acceleration, which has increase tendency and is not up to slope in acceleration value, faces the sliding early warning value last stage, in conjunction with the hair of slope crack
Warning level is divided into warning grade and warning grade by exhibition with perforation, distribution situation, and corresponding early warning color is yellow and orange；If
Inflection point later stage acceleration rises suddenly, and Slope acceleration value is more than the feature faced sliding early warning value, and show mutation, simultaneously
Side slope trap boundary is formed completely, and trap boundary is with sliding surface completely through then side slope warning level is alarm grade, corresponding early warning
Color is red.
The present invention combines side slope macroscopic failure feelings according to acceleration value and its variation tendency obtained by Analysis on monitoring data
Condition is sentenced and knows slope stability and carry out grading forewarning system forecast, is steady-state deformation shape before deforming acceleration-time graph inflection point
State then illustrates that side slope is currently in safe condition, there is no needs early warning if phenomena such as crack, surface uplift does not occur in earth's surface；It turns
The point later stage according to acceleration value size and variation tendency, and in conjunction with side slope macroscopic failure situation precisely divide warning level and
Early warning color, if only may result in the result of mistake from time or spatial evolution rule folk prescription surface analysis and prediction and warning.
The present invention is suitable for all slope stabilities with step evolution deformation behaviour point and sentences knowledge and early-warning and predicting, utilizes its step section
The deformation curve of endpoint fitting simultaneously gos deep into, can more fully, and more accurately Slope Stability makes early-warning and predicting.
It includes one flat that the bevel edge slope of the ladder-like jump deformation of the present invention, which has multiple continuous ladder sections, each ladder section,
The endpoint of sliding section and steep increasing section, ladder section is the front end endpoint of smooth section and the steep upper end endpoint for increasing section.
Mapping software employed in the present invention includes the softwares such as Matlab, Excel, Origin.
Embodiment
For the present embodiment using reservoir area of Three Gorges ancient slide as research object, the landslide front landform is relatively slow, and 30 ° of natural grade~
35°.Come down leading edge elevation about 100m, rear elevation about 319.5m, relative relief about 221.5m, and total volume about 407.79 ×
104m3.Since Impoundment of Three Gorges Reservoir, there is the sign of more characterization Formation of Revived Fossil Landslide, including surface cracks, foreland
Table swells, house crack, friction pile deformation etc..Geologic prospecting party has also carried out a large amount of prolonged displacement, water levels to the landslide simultaneously
Etc. conditions monitoring, for the security of the lives and property of protection tourist and local resident, relevant departments are made that at reinforcing this side slope
Reason.The present invention overcomes conventional landslide early-warning and predicting method to step evolution deformation behaviour Analysis of Slope Stability will produce compared with
The problem of big error can provide to policymaker and manager and accurately sentence knowledge foundation.
Steps are as follows for specific evaluation method：
The first step：According to long term monitoring data, using mapping software (Excel) draw out slope deforming-time graph (see
Fig. 1), slope deforming-time graph 1 is stepped, has multiple continuous ladder sections, determines " ladder section " each in curve
Endpoint；
Second step：Each endpoint fitting in the first step is connected into transition shift-time graph 2 (see Fig. 1)；
Third walks：The time t of each monitoring cycle of transition shift-time graph is determined on the basis of second stepi(i=1,
2,3 ... n) and its corresponding deflection di(i=1,2,3 ... n), and i indicates i-th of monitoring cycle, monitoring cycle when
Between can be 3 days, 5 days, 7 days etc.；
The deflection d of i-th monitoring period of timeiCalculation formula is：
di=dThe ends i-dAt the beginning of i (2)
In formula：dThe ends iDeflection when being terminated for i-th of monitoring cycle, dI beginsAccumulative change when being originated for i-th of monitoring cycle
Shape amount.
The deflection d of i-th of monitoring cycleiThe time t undergoneiCalculation formula is：
ti=tThe ends i-tAt the beginning of i (3)
In formula：tThe ends iAt the time of when being terminated for i-th of monitoring cycle, tI beginsAt the time of when being originated for i-th of monitoring cycle；
4th step：The deformation velocity in each monitoring cycle of transition shift-time graph is calculated according to the result of third step,
According to the deformation velocity v in the i-th monitoring cycle of calculating of formula (1)iCalculation formula is：
5th step：Using deformation velocity as the longitudinal axis, using the time as horizontal axis, scatter plot is drawn with four-step calculation acquired results,
Then slope deforming speed-time curve figure is obtained by smoothing processing, sees Fig. 2；
6th step：Deformation acceleration a is calculated using institute's slope deforming speed-time curve figure is calculated in the 5th stepi, meter
Calculating formula isIn formula：viIndicate the deformation velocity of i-th of monitoring cycle, tiIndicate i-th
The monitoring time of a monitoring cycle, i indicate i-th of monitoring cycle；
7th step：To deform acceleration as the longitudinal axis, using the time as horizontal axis, acquired results is calculated with the 6th step and draw scatterplot
Figure, then obtains slope deforming acceleration-time plot by smoothing processing, sees Fig. 3, and is accurately positioned and captures inflection point position
It sets；
As can be seen from FIG. 3：In AB sections of acceleration values in 0 or so fluctuation, illustrate that slope is in constant speed deformation state, slope is still
Acceleration deformation state is not entered；B points be monitoring time end point, according to up to 8 years monitoring data and analyse in depth result to oblique
Slope stability future developing trend makes following hypothesis：If Slope acceleration declines after B points, such as BE sections in Fig. 3, then say
Bright slope stability takes a favorable turn；If Slope acceleration then illustrates slope in increase trend such as BD sections in Fig. 3 after B points
Into accelerating deformation state, slope stability to deteriorate, government and each relevant departments need to attract great attention at this time, need to adopt in time
Landslide control behave is taken, friction pile is such as laid, cuts the behaves such as slope loss of weight；Especially slope acceleration is more than early warning value δ=0.1mm/
d2, i.e., illustrate that slope stability drastically deteriorates as Fig. 3 enters CD sections, it may occur however that landslide, government should carry out masses' evacuation in time
People's life and property safety are utmostly protected in work.
In conjunction with the preliminary judging result of Fig. 3, in inflection point B early period, that is, AB sections (slope constant speed deformation stages), if slope does not go out
Existing tension fracture, then illustrate slope stability；If the tension fracture being discontinuously distributed occurs in slope, the warning level of side slope is to pay attention to
Grade, early warning color are blue；It is obtained according to up to 8 years slope monitoring data and combination evaluation method of the present invention in-depth analysis
Slope acceleration value is in -0.05mm/d2With 0.1mm/d2Between fluctuate, acceleration value is less than 0.1mm/d2, therefore will accelerate
Angle value is 0.1mm/d2Be set as the landslide faces sliding early warning value δ.Therefore increase in conjunction with Slope acceleration in the inflection point B later stages
Trend (BC sections i.e. acceleration increases and less than facing the sliding early warning value δ stages), development and perforation situation of slope crack etc. are by early warning
Partition of the level is warning grade and warning grade, and corresponding early warning color is yellow and orange；If inflection point later stage Slope acceleration
After value rises i.e. C points suddenly, the feature of mutation is shown, while side slope boundary is formed completely, sliding surface is completely through then side slope
Warning level is alarm grade, and corresponding early warning color is red.
Specific warning grade division is shown in Table 1.
Table 1
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from protection domain defined by the present invention.
Claims (3)
1. a kind of bevel edge Slope Stability Evaluation method of ladder-like jump deformation, this approach includes the following steps：
The first step：According to monitoring data, slope deforming-time graph is drawn out using mapping software, and determine each in curve
The endpoint of " ladder section "；
Second step：Each endpoint fitting in the first step is connected into transition shift-time graph；
Third walks：The time t of each monitoring cycle of transition shift-time graph is determined on the basis of second stepiAnd its corresponding change
Shape amount di, i i-th of monitoring cycle of expression, i=1,2,3 ...；
4th step：According to the result of third step according to the deformation speed in formula (1) calculating each monitoring cycle of transition shift-time graph
Degree；
5th step：Using deformation velocity as the longitudinal axis, the time is horizontal axis, draws scatter plot according to four-step calculation result, then passes through
Smoothing processing obtains slope deforming speed-time curve figure；
6th step：It is calculated in each monitoring cycle using slope deforming speed-time curve figure in the 5th step and deforms acceleration；
7th step：To deform acceleration as the longitudinal axis, the time is horizontal axis, and calculating data according to the 6th step draws scatter plot, then passes through
It crosses smoothing processing and obtains slope deforming acceleration-time plot, and corner position is accurately positioned；
8th step：On the basis of seven steps, the forward and backward phase acceleration value of acceleration-time plot inflection point is deformed according to gained and is become
Change trend, the preliminary stability for judging side slope；
9th step：On the basis of eight steps, situation is destroyed in conjunction with side slope macroscopic deformation, carries out side slope early warning anticipation classification.
2. method as described in claim 1, it is characterised in that：The step of tentatively judging the stability of side slope in 8th step be：
Inflection point early period, slope deforming acceleration value illustrate that side slope is in stable state in 0 or so fluctuation；If inflection point later stage acceleration value
It gradually increases or even increases suddenly, then illustrate that slope stability drastically declines, most probably come down；If inflection point later stage acceleration
It is gradually reduced or even is become negative value, then illustrates that slope deforming is gradually tending towards stability, stability improves.
3. method as described in claim 1, it is characterised in that：The process of side slope early warning anticipation classification is in 9th step：In inflection point
Early period illustrates that slope is relatively stablized if slope rear does not occur tension fracture；If there is the tensile crack being discontinuously distributed in side slope,
Then the warning level of side slope is to pay attention to grade, and early warning color is blue；It is analyzed according to long term monitoring data and slope macroscopic view is combined to become
Shape situation, determine the Slope acceleration faces sliding early warning value；There is increase tendency in inflection point later stage deformation acceleration and is adding
Velocity amplitude is not up to slope and faces the sliding early warning value last stage, in conjunction with development and the perforation of slope crack, distribution situation by warning level
It is divided into warning grade and warning grade, corresponding early warning color is yellow and orange；If inflection point later stage acceleration rises suddenly, slope
Deformation acceleration value is more than the feature faced sliding early warning value, and show mutation, while side slope trap boundary is formed completely, trap side
Boundary is with sliding surface completely through then side slope warning level is alarm grade, and corresponding early warning color is red.
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| CN109614760A (en) * | 2019-01-21 | 2019-04-12 | 北京科技大学 | A kind of Stability Analysis Methods for Evaluating Landslide and evaluating apparatus |
| CN110210774A (en) * | 2019-06-10 | 2019-09-06 | 中国地质调查局西安地质调查中心 | Landslide risk evaluation method and system |
| CN110210774B (en) * | 2019-06-10 | 2021-06-11 | 中国地质调查局西安地质调查中心 | Landslide risk evaluation method and system |
| CN112950901A (en) * | 2021-01-25 | 2021-06-11 | 江苏霆善科技有限公司 | Disaster monitoring system and method based on data analysis |
| CN112950901B (en) * | 2021-01-25 | 2024-01-02 | 江苏霆善科技有限公司 | Disaster monitoring system and method based on data analysis |
| CN113761744A (en) * | 2021-09-07 | 2021-12-07 | 四川中科数微科技有限公司 | Slope instability time prediction method based on dip angle sudden change |
| CN113538861A (en) * | 2021-09-16 | 2021-10-22 | 山东金科星机电股份有限公司 | Geological disaster information management system based on mineral geological exploration |
| CN114235566A (en) * | 2021-11-08 | 2022-03-25 | 中国电建集团华东勘测设计研究院有限公司 | Model test system and method for testing multiple arc model calculation design thrust effect |
| CN114235566B (en) * | 2021-11-08 | 2023-09-15 | 中国电建集团华东勘测设计研究院有限公司 | Model test system and method for checking multiple circular arc model calculation design thrust effect |
| CN116026267A (en) * | 2022-12-12 | 2023-04-28 | 中铁西北科学研究院有限公司 | Sliding surface position accurate determination method based on multi-sliding-surface B-type deep hole inclinometry curve |
| CN116026267B (en) * | 2022-12-12 | 2023-09-08 | 中铁西北科学研究院有限公司 | Sliding surface position accurate determination method based on multi-sliding-surface B-type deep hole inclinometry curve |
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