CN102607646B - Riverbank stability monitoring, analysis and assessment method - Google Patents
Riverbank stability monitoring, analysis and assessment method Download PDFInfo
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Abstract
A riverbank stability monitoring, analysis and assessment method includes: building monitoring leads based on a near-shore riverbed topographic map and a monitoring data acquisition network for near-shore riverbed underwater slope analysis sections; using the river-channel near-shore riverbed topographic map as basic information to digitally process the part of the topographic map of river-channel near-shore riverbed where the scour-and-fill monitoring lead is located, and digitally processing the part of the topographic map of the river-channel near-shore riverbed where the underwater slope monitoring start lead, the underwater slope monitoring end lead and an intersection of the scour-and-fill monitoring lead and the monitoring analysis section are located; according to obtained data, drawing a riverbed elevation change relation diagram of the scour-and-fill monitoring lead along the flow path, drawing a relation diagram about change of near-shore riverbed underwater slope ratio and underwater inner footing slope ratio, and calculating an average of sections; and scoring grading detailed rules of classification grade characteristic items for the segments according the obtained data and technical parameters such as riverbank geological boundary conditions and the like, calculating and assessing comprehensive scores, and assessing bank slope stability risk levels of the corresponding sections.
Description
Technical field
The present invention relates to hydraulic engineering technical field, specifically a kind of bank stability monitoring analysis and appraisal procedure.
Background technology
Collapse on the bank is a kind of form of expression of channel change; be prevalent in river course, river plain; disappearance " is nibbled " in the impact of bank line avalanche not only just relevant location beach gradually; the particularly important is collapse on the bank and jeopardize the dyke building basis safety of building on beach; and then the people's security of the lives and property that is threatening levee protection district, affect the socioeconomic normal development of normal utilization and levee protection district of River Bank-Line resources development and utilization, two sides, river course water conservancy projects.Channel revetment engineering is to maintain or control the stable a kind of effective measures of River Bank-Line; be widely used in river plain river regulation engineering; the same with all construction works; channel revetment engineering is not to put things right once and for all, have yet its natural life-span; especially bank-protection works under water; damage by water is to affect the channel revetment engineering principal element of natural life-span, the bank slope that loses bank-protection works protection apart from the date that collapse on the bank occurs just within sight.
At present to process be the improvement after collapse on the bank to bank stabilization risk substantially, still difficulty accomplishes to nip in the bud, consequently loss occurrence, and the difficulty of bank slide treatment and scale are more much bigger than the difficulty and the scale that have routinely the maintenance of important requirement to reinforce.The avalanche of bank line or riverbank unstability are the constantly processes of accumulation of bank stabilization risk, and generation, the accumulation of generally experiencing bank stabilization hidden danger develop, occur the time course of collapse on the bank phenomenon, and this has also just had a predictable chance of bank stabilization risk.Nip in the bud, bank stabilization hidden danger is administered in good time, remarkable to safeguarding the stable effect on riverbank, can avoid the serious accidents such as flood control to occur.Analysis and evaluation bank stabilization degree of risk, is to determine bank stabilization risk processing important evidence, and the flood control work in river course is had to directive function.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of bank stability monitoring analysis and appraisal procedure, can find in time river course, river plain, especially the degree of bank stabilization risk of reservoir dam downstream river course and the trend of variation, directly for the Risk Governance that has potential safety hazard bank section provides technological guidance; For the safety management such as flood control safety, the water conservancy projects safe operation of two sides, river course of dyke building protected location, relevant section provides technical support.
A kind of bank stability monitoring analysis and appraisal procedure, comprise the steps:
Steps A: set up monitoring wire based on offshore bed configuration figure and the Monitoring Data collection network of offshore river bed water descending slope analysis section; Wherein monitoring wire has 3, is respectively erosion and deposition monitoring wire, Underwater Slope monitoring starting point wire, Underwater Slope monitoring terminal wire; Slope Analysis section is arranged on demand under water, and general interval 50～300m arranges 1 monitoring analysis section;
Step B: taking river course offshore bed configuration figure as basic document, topomap to erosion and deposition monitoring position, offshore riverbed, river course, wire place carries out digitized processing, according to obtained outcome data data, draw the bed elevation variation relation figure of erosion and deposition monitoring wire along Parallel to the flow direction, and calculate each segmentation elevation variation mean value;
Step C: taking river course offshore bed configuration figure as basic document, the topomap of the position, offshore riverbed, river course, intersection point place of the monitoring analysis section to monitoring wire and vertical streamflow direction carries out digitized processing, according to obtained outcome data data, draw offshore river bed water slope, the toe inner slope slope ratio variation relation figure along flow process, and calculate each segmentation slope average of relatives value;
Step D: according to above-mentioned analysis results, and develop key element in conjunction with geological boundry condition and river gesture runoff external force condition, water front situation and river, section, the analysis and evaluation bank section place gesture on riverbank, by bank stabilization venture influence factor classification grade score by rules, analysis and evaluation bank section is carried out to classification grade tax point, then calculate the comprehensive score value of composing, wherein river course bank slope geologic structure and shore protection situation are to affect the stable geological boundry condition of bank line; By comprehensive interval of composing score value place bank stability risk class, determine the bank stability risk class in corresponding location.
The present invention has following beneficial effect:
(1) can directly reflect the erosion and deposition situation of change of monitoring bank section offshore along the line riverbed comprehensively, overcome typical section method and analyze the representative limitation that offshore riverbed changes, reach and can directly find to monitor that bank section offshore riverbed erosion and deposition changes along journey (Parallel to the flow direction) distribution relation, there is the feature of overall quantitative analysis;
(2) can directly reflect the situation of change of monitoring bank section offshore river bed water along the line slope and toe inner slope comprehensively, reach and can directly find to monitor that bank section offshore river bed water descending slope changes along journey (Parallel to the flow direction) distribution relation, there is the feature of overall quantitative analysis.
(3) bank stability is carried out to objective evaluation, the possibility that prediction riverbank collapse on the bank occurs, provides scientific basis for preventing Bank Failure dangerous situation and collapse on the bank dangerous situation to administer, for the safety management in river course provides technical support.
Brief description of the drawings
Fig. 1 is the arrangenent diagram of offshore riverbed, mouth location, north gate monitoring wire and monitoring section;
Fig. 2 is taking mouth location, Jingjiang reach of Yangtze River north gate as example, offshore riverbed monitoring section Underwater Slope, toe inner slope subregion schematic diagram;
Fig. 3 is taking mouth location, Jingjiang reach of Yangtze River north gate as example, and under offshore river bed water, toe forward position monitoring wire elevation is along journey variation diagram;
Fig. 4 is taking mouth location, Jingjiang reach of Yangtze River north gate as example, and offshore river bed water slope slope ratio is along journey variation diagram;
Fig. 5 is taking mouth location, Jingjiang reach of Yangtze River north gate as example, and under offshore river bed water, toe inner slope slope ratio is along journey variation diagram.
Embodiment
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described.
Bank stability monitoring analysis of the present invention and appraisal procedure comprise the steps:
Steps A: set up monitoring wire based on offshore bed configuration figure and the Monitoring Data collection network of offshore river bed water descending slope analysis section; Monitoring wire has 3, is respectively erosion and deposition monitoring wire, Underwater Slope monitoring starting point wire, Underwater Slope monitoring terminal wire; Slope Analysis section is arranged on demand under water, and general interval 50～300m arranges 1 monitoring analysis section.
While determining the plane coordinates position of described erosion and deposition monitoring wire, consider following content element: 1. to have river course under water the need of bank-protection works consider the width of channel revetment Underwater Engineering, the planimetric position of erosion and deposition monitoring wire is apart from 5～30 meters of the outer rims of channel revetment Underwater Engineering; 2. without the channel revetment location of bank-protection works under water, by the inward flange line-spacing of offshore deep trouth for many years the width of average low water bit line determine the planimetric position of erosion and deposition monitoring wire, the planimetric position of erosion and deposition monitoring wire is apart from average low water bit line 60-150 rice for many years; 3. consider simultaneously river course low water level flowage line irregularity and low water season offshore main stream line smooth and easy, suitably adjust the planimetric position of erosion and deposition monitoring wire, make erosion and deposition monitoring wire smooth and easy.
While determining the plane coordinates position of described Underwater Slope monitoring starting point wire, consider following content element: the bed elevation of the position, reference mark on wire is lower than average low water level 2～3m for many years;
While determining the plane coordinates position of described Underwater Slope monitoring terminal wire, consider following content element: the position, reference mark on wire is that near fracture morphology toe changes near " flex point ";
To the north of doorway section be example (as shown in Figure 1), north gate mouth monitoring bank section overall length 6km, wherein pile No. 6+000～9+000 section (long 3km) is bank-protection works section, bank-protection works width 60m～80m under water; Pile No. 9+000～12+000 section (long 3km) is bank-protection works section not.Erosion and deposition monitoring wire is a smooth-going multiple spot curve; be positioned near channel revetment section Underwater Engineering forward position and near river course not the inward flange line of shore protection section offshore deep trouth; basic guarantee is through offshore deep trouth; its surface level position is apart from low water level 25.6m (85 Huanghai Sea basal plane) approximately 80～120m of line, and low water level 25.6m is the annual mean for many years of water level month by month in June, 2003 (Three Gorges Projects retaining is used rear) to the annual March 12～next year between in Dec, 2011.By the requirement of above-mentioned layout monitoring wire content, determine north gate mouth section Underwater Slope monitoring starting point wire, Underwater Slope monitoring terminal wire, erosion and deposition monitoring wire, refer to Fig. 1; Slope Analysis section is arranged 1 monitoring analysis section by interval 200m under water, refers to Fig. 1.
Step B: taking river course offshore bed configuration figure as basic document, topomap to erosion and deposition monitoring position, offshore riverbed, river course, wire place carries out digitized processing, according to obtained outcome data data, draw the bed elevation variation relation figure of erosion and deposition monitoring wire along Parallel to the flow direction, and calculate each segmentation elevation variation mean value;
Described step B specifically comprises:
Data acquisition: for example,, as initial point, corresponding embankment bank-protection works pile No., gathers a height value at a certain distance along monitoring wire to monitor the point (: monitoring top, wire upstream point) of a setting on wire.
Data processing: utilize EXCEL, AUTOCAD program to draw monitoring wire elevation along journey variation diagram (as shown in Figure 3); Analyze the monitoring wire elevation of different times along journey variation diagram, calculate by the segmentation of monitoring wire elevation variation characteristic the amplitude that each section washes away or deposits.
Step C: taking river course offshore bed configuration figure as basic document, the topomap of the position, offshore riverbed, river course, intersection point place of the monitoring analysis section to monitoring wire and vertical streamflow direction carries out digitized processing, according to obtained outcome data data, draw offshore river bed water slope, the toe inner slope slope ratio variation relation figure along flow process, and calculate each segmentation elevation and change mean value;
Described step C specifically comprises:
Data acquisition: monitoring section under water slope ratio is that the segmental averaging of river course offshore slope is generally changed, offshore slope is divided into Underwater Slope and toe inner slope under water.Underwater Slope scope: Underwater Slope monitoring starting point wire is to the region between Underwater Slope monitoring terminal wire; Toe inner slope scope under water: Underwater Slope monitoring terminal wire is to the region between erosion and deposition monitoring wire.The intersection point of monitoring section line and Underwater Slope monitoring starting point wire, Underwater Slope monitoring terminal wire is the raw data acquisition point of Underwater Slope slope ratio, read horizontal range between each collection point bed elevation and at 2, calculate relevant monitoring section Underwater Slope slope ratio according to the bed elevation of 2 intersection points that gather and level interval.The intersection point of monitoring section line and Underwater Slope monitoring terminal wire, erosion and deposition monitoring wire is the raw data acquisition point of toe inner slope slope ratio under water, read horizontal range between each collection point bed elevation and at 2, calculate relevant monitoring section toe inner slope slope ratio under water according to the bed elevation of 2 intersection points that gather and level interval.
Data processing: calculate the Underwater Slope slope ratio of each monitoring section, toe inner slope slope ratio under water, utilize that EXCEL, AUTOCAD program are drawn prison Underwater Slope slope ratio, toe inner slope slope ratio is along journey variation diagram (referring to shown in Fig. 4,5) under water; Analyze the slope ratio of different times along journey variation diagram, calculate division section Underwater Slope slope ratio, the amplitude of variation of toe inner slope slope ratio under water by slope than variation characteristic segmentation.
Step D: according to above-mentioned analysis results, and develop key element in conjunction with geological boundry condition and river gesture runoff external force condition, water front situation and river, section, the analysis and evaluation bank section place gesture on riverbank, by bank stabilization venture influence factor classification grade score by rules, analysis and evaluation bank section is carried out to classification grade tax point, then calculate the comprehensive score value of composing of assessment, wherein river course bank slope geologic structure and shore protection situation are to affect the stable geological boundry condition of bank line; By comprehensive interval of composing score value place bank stability risk class, determine the bank stability risk class in corresponding location.Bank stability risk assessment is divided into 4 grades: general, secondary is set up defences, one-level is set up defences, alert level, and corresponding color tips is respectively: green bank section, blue bank section, orange early warning bank section, red early warning bank section.River gesture is the relativeness of channel line and riverbank, middle bar (beach) edge line.Described river gesture develops key element and comprises: the set up defences planimetric position of bank line and middle bar (beach) edge line under water level condition of the mobility scale of channel line planimetric position, river flood control.
Bank stabilization venture influence factor classification grade score by rules:
Classification grade feature scoring clause detailed rules and regulations are divided into: condition flag clause, wash away process feature clause and water front situation feature clause, the tax of every class clause divides as follows:
1, condition flag scoring clause
Condition flag scoring clause is divided into geological boundry condition and river gesture runoff external force condition, and river course bank slope geologic structure and shore protection situation are to affect the stable geological boundry condition of bank line, and river gesture characteristics of Runoff is to affect bank line to stablize external force condition.The comprehensive scores of condition flag clause adopts method of weighted mean, and wherein, geological boundry condition accounts for 70%, and river gesture runoff external force condition accounts for 30%; The score value that bank line is stablized geology boundary condition is 0～10, and wherein, the score value of river course bank slope geologic structure is 0～10, and the score value of shore protection situation is 0～7, adopts score value with regard to high measurement principle; The score value of river gesture runoff external force condition is 0～-3.To condition flag clause, tax point illustrates as follows below:
1) bank slope geologic structure situation grade clause:
Ground-1: the diadactic structure of upper sticky lower sand, compose score value 0;
Ground-2: flour sand layer structure, compose score value 0;
Ground-3: loam burning into sand layer structure, compose score value 1;
Ground-4: loam structure, compose score value 2;
Ground-5: old caly structure, compose score value 5;
Ground-6 rock textures, compose score value 10.
2) shore protection situation grade clause:
Protect-0: not shore protection section, compose score value 0;
The bank-protection works that protect-1:1998 implemented in the past, unguyed after 1998, compose score value+2;
The bank-protection works that protect-2:1998 implemented in the past, reinforces for 1999～2003 under water, and slope protection works transformation waterborne is existing substantially intact, composes score value+3;
The bank-protection works that protect-3:1998 implemented in the past, reinforcing under water in 2006～2009, slope protection works waterborne transformation, existing substantially intact, compose score value+5;
The bank-protection works that protect-4:1998 implemented in the past, reinforcing under water in 2010～2011, slope protection works waterborne transformation, existing substantially intact, compose score value+4;
The new bank-protection works that implement protect-5:1999～2003 year, unguyed after 2003, slope protection works waterborne is now substantially intact, composes score value+5;
The new bank-protection works that implement protect-6:1999～2003 year, unguyed after 2003, there is many places breakage in slope protection works waterborne, composes score value+4;
New bank-protection works or the reinforcing engineering that implement protect-7:2006～2009 year, slope protection works waterborne is now substantially intact; Compose score value+6;
The new bank-protection works that implement protect-8:2010～2011 year, existing intact, compose score value+7.
3) river gesture runoff external force condition situation grade clause:
River-0: section, monitoring section place (scope: the upstream 5km of monitoring section upper end is to the downstream 3km of monitoring section lower end, lower same) river gesture is stable, and non-mainstream Tie An district, monitored area, composes score value 0;
River-1: river, section, monitoring section place gesture is stable, the seasonal straight transition section that pastes stream, composes score value-1;
River-2: river, section, monitoring section place gesture is basicly stable, the seasonal stream top of pasting rushes bend section, composes score value-2;
River-3: river, section, monitoring section place gesture has obvious adjustment, paste stream top throughout the year and rush bend section, compose score value-3.
2, wash away process feature scoring clause
Be divided into offshore channel scour degree and offshore slope situation of change, total score value is 0～-10, wherein, the score value of offshore channel scour degree (being the amplitude of washing away or depositing calculating in above-mentioned steps B) is 0～-7, the score value of offshore slope situation of change (be the Underwater Slope slope ratio that calculates in above-mentioned steps C, under water the amplitude of variation of toe inner slope slope ratio) is 0～-3, and the score value that washes away process feature clause adopts arithmetic summation measurement principle.Illustrate as follows to washing away the tax point of process feature clause below:
1) offshore channel scour intensity grade clause:
During punching-0:2006 year 10～Dec in May to 2011, the section of toe forward position alluvial under water, composes score value 0.
During punching-1:2006 year 10～Dec in May to 2011, toe forward position on average rushes in dark 2.0m under water, in the dark 3.0m of favourable opposition, composes score value-1;
During punching-2:2006 year 10～Dec in May to 2011, toe forward position on average rushes in dark 2.0～4.0m, the dark 4.0～6.0m of favourable opposition under water, composes score value-3;
During punching-3:2006 year 10～Dec in May to 2011, toe forward position on average rushes dark 4.0～6.0m under water; The dark 6.0～9.0m of favourable opposition, composes score value-5;
During punching-4:2006 year 10～Dec in May to 2011, more than toe forward position on average rushes dark 6.0m under water; More than the dark 9.0m of favourable opposition, compose score value-7;
During punching-5:2006 year 10～Dec in May to 2010, toe forward position on average rushes dark 4.0～6.0m under water, and 10～Dec to 2011 in 2008, year 10～Dec, 3 hydrology phases all washed away, and composes score value-5;
Since punching-6:1998 September, rock head scour pit is the expansion trend of washing away, and scour pit area in 2011 reaches or approaches the maximal value having had since record, composes score value-7;
Since punching-7:1998 September, rock head scour pit is the dark trend of rushing, and scour pit minimum point elevation in 2011 reaches or approaches the minimum point having had since record, composes score value-7;
2) offshore channel gradient situation grade clause:
During slope-1:2007 year Dec in October to 2011, Underwater Slope mean inclination value is less than 0.33 (1: 3), within nearly 3 years, there is no steepening trend; Toe inner slope is mild, composes score value 0;
During slope-2:2007 year Dec in October to 2011, Underwater Slope mean inclination value is less than 0.33 (1: 3), within nearly 3 years, has steepening trend; Or toe inner slope has steepening trend; Compose score value-1;
During slope-3:2007 year Dec in October to 2011, Underwater Slope mean inclination value 0.33～0.5 (1: 2), does not have steepening trend for nearly 3 years; Toe inner slope does not have steepening trend, composes score value-2;
During slope-4:2007 year Dec in October to 2011, toe inner slope has steepening trend for nearly 3 years under water, composes score value-2.
During slope-5:2007 year Dec in October to 2011, Underwater Slope mean inclination value is greater than 0.5 (1: 2), within nearly 3 years, has steepening trend, composes score value-3.
3, water front situation feature scoring clause
For bank line avalanche situation, bank line avalanche is the result that bank line is stablized concentration of risk outburst, and the score value of water front situation feature clause (bank line avalanche) is 0～-10.Opposite bank wire condition feature clause tax point below illustrates as follows:
Collapse-0: in shore protection section recent five years (hydrologic year, lower with), do not occur collapse on the bank, in shore protection section recent five years, do not occurred that obvious damaged or destroyed by flood or bank slope cunning frustrate, compose score value 0;
Collapse-1: beyond people's dike engineering 200m, a small amount of collapse on the bank point does not appear in shore protection section in nearest 3 years; Shore protection section occurs in nearest 3 years that a small amount of damaged or destroyed by flood or low water platform forward position hang bank, and collapse on the bank point do not repair, and composes score value-2;
Collapse-2: beyond main dike engineering 200m, a small amount of collapse on the bank point does not appear in shore protection section in nearest 3 years; Shore protection section occurs in nearest 3 years that a small amount of damaged or destroyed by flood or bank slope cunning frustrate, and collapse on the bank point do not repair, and composes score value-3;
Collapse-3: from people's dike engineering 100～200m, more collapse on the bank point does not appear in shore protection section in nearly 3 years, shore protection section occurs in nearly 3 years that a small amount of bank slope cunning frustrates, and collapse on the bank or bank slope cunning are frustrated in a scope of the each 250m of upstream and downstream, composes score value-4;
Collapse-4: from main dike engineering 100～200m, more collapse on the bank point does not appear in shore protection section in nearly 3 years, shore protection section occurs in nearly 3 years that a small amount of bank slope or low water platform cunning frustrate, and collapse on the bank or bank slope cunning are frustrated in a scope of the each 250m of upstream and downstream, composes score value-5;
Collapse-5: in people's dike engineering 100, more collapse on the bank point does not appear in shore protection section in first 3 years, shore protection section occurs in nearly 3 years that a small amount of bank slope cunning frustrates, and collapse on the bank or bank slope cunning are frustrated in a scope of the each 250m of upstream and downstream, composes score value-6;
Collapse-6: beyond main dike engineering 200m, a large amount of collapse on the bank points do not appear in shore protection section in nearest 3 years, compose score value-7;
Collapse-7: beyond people's dike engineering 200m, a large amount of collapse on the bank points do not appear in shore protection section in nearest 3 years, compose score value-6;
Collapse-8: in main dike engineering 100, more collapse on the bank point does not appear in shore protection section in first 3 years, shore protection section occurs in first 3 years that a small amount of bank slope or low water platform cunning frustrate, and collapse on the bank or bank slope cunning are frustrated in a scope of the each 250m of upstream and downstream, composes score value-7;
Collapse-9: occur then collapse on the bank, with interior water front, compose score value-7 from people's dike engineering 100m.
Collapse-10: occur then collapse on the bank, with interior water front, compose score value-8 from main dike engineering 100m.
Collapse-11: occur that then collapse on the bank or bank slope cunning frustrate, with interior water front, compose score value-9 from people's dike engineering 50m.
Collapse-12: occur that then collapse on the bank or bank slope cunning frustrate, with interior water front, compose score value-10 from main dike engineering 50m.
Bank stability comprehensive scores computing method
According to affecting the factor of bank stability risk and the feature that different phase risk shows, be divided into condition flag clause, wash away process feature clause and water front situation feature clause assessment tax score value, according to condition (weight 30%), process (weight 30%) and result clause (weight 40%) method of weighted mean are assessed bank line stability.In table 1.
Table 1 bank stability sexual factor score value assessment weight distribution table
| Provision name | Condition flag clause | Wash away process feature clause | Water front situation |
| Weight | |||
| 30％ | 30％ | 40％ |
River course bank stability risk class division methods
The comprehensive assessment of monitoring bank section bank stability risk class is according to the bank stability comprehensive assessment score value of monitoring bank section, and the actual conditions of corresponding each bank section, determine river course bank stability risk class comprehensive assessment score value scope, in table 2.
Table 2 river course bank stability risk class comprehensive assessment score value scope statistical form
| Stability risk grade | General bank section | The secondary bank section of setting up defences | The one-level bank section of setting up defences | Warning bank section |
| Color early warning | Green bank section | Blue bank section | Orange early warning bank section | Red early warning bank section |
| Comprehensive scores scope | Be greater than 0 | 0～-2.0 | -2.0～-3.0 | Be less than-3.0 |
According to above-mentioned bank stabilization venture influence factor classification grade score by rules, the concrete condition of contrast north gate mouth section, comprehensive assessment river course bank slope condition flag, wash away process feature, water front situation feature is composed score value and calculates comprehensive scores the grade of this section of bank stability impact.Refer to table 3.
Score value statistical form is composed in the bank stability venture influence assessment of Kou Duan river course, table 3 north gate
The stable grade of score value division Kou Duan river course, north gate bank slope is composed in Kou Duan river course, the north gate bank stability venture influence assessment of pressing table 2 river course bank stability risk class comprehensive assessment score value scope and table 3.Refer to table 4.
The stable grade statistical form of Kou Duan river course, table 4 north gate bank slope
Application example
At present the method has started to be applied to the river gesture monitoring analysis work of Jingjiang section, middle reaches, the Changjiang river, be used for analysis and evaluation Impoundment of Three Gorges Reservoir use after impact on Jingjiang River stability, for Bank Failure diaster prevention and control planning provides service.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any belong to those skilled in the art the present invention disclose technical scope in; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.
Claims (4)
1. bank stability monitoring analysis and an appraisal procedure, is characterized in that comprising the steps:
Steps A: set up monitoring wire based on offshore bed configuration figure and the Monitoring Data collection network of offshore river bed water descending slope analysis section; Wherein monitoring wire has 3, is respectively erosion and deposition monitoring wire, Underwater Slope monitoring starting point wire, Underwater Slope monitoring terminal wire; Slope Analysis section is arranged on demand under water, and general interval 50～300m arranges 1 monitoring analysis section;
Step B: taking river course offshore bed configuration figure as basic document, topomap to erosion and deposition monitoring position, offshore riverbed, river course, wire place carries out digitized processing, according to obtained outcome data data, draw the bed elevation variation relation figure of erosion and deposition monitoring wire along Parallel to the flow direction, and calculate each segmentation elevation variation mean value;
Step C: taking river course offshore bed configuration figure as basic document, the topomap of the position, offshore riverbed, river course, intersection point place of the monitoring analysis section to monitoring wire and vertical streamflow direction carries out digitized processing, according to obtained outcome data data, draw offshore river bed water slope, the toe inner slope slope ratio variation relation figure along flow process, and calculate each segmentation slope average of relatives value;
Step D: according to above-mentioned analysis results, and develop key element in conjunction with geological boundry condition and river gesture runoff external force condition, water front situation and river, section, the analysis and evaluation bank section place gesture on riverbank, by bank stabilization venture influence factor classification grade score by rules, analysis and evaluation bank section is carried out to classification grade tax point, then calculate the comprehensive score value of composing, wherein river course bank slope geologic structure and shore protection situation are to affect the stable geological boundry condition of bank line; By comprehensive interval of composing score value place bank stability risk class, determine the bank stability risk class in corresponding location;
While determining the plane coordinates position of described erosion and deposition monitoring wire in described steps A, consider following content element: 1. to there being the location of bank-protection works under water, river course, the planimetric position of erosion and deposition monitoring wire is apart from 5～30 meters of the outer rims of channel revetment Underwater Engineering; 2. without the channel revetment location of bank-protection works under water, by the inward flange line-spacing of offshore deep trouth for many years the width of average low water bit line determine the planimetric position of erosion and deposition monitoring wire, the planimetric position of erosion and deposition monitoring wire is apart from average low water bit line 60-150 rice for many years; 3. consider simultaneously river course low water level flowage line irregularity and low water season offshore main stream line smooth and easy, suitably adjust the planimetric position of erosion and deposition monitoring wire, make erosion and deposition monitoring wire smooth and easy; While determining the plane coordinates position of described Underwater Slope monitoring starting point wire in described steps A, consider following content element: the bed elevation of the position, reference mark on wire is lower than average low water level 2～3m for many years; While determining the plane coordinates position of described Underwater Slope monitoring terminal wire in described steps A, consider following content element: the position, reference mark on wire is that near fracture morphology toe changes near " flex point ".
2. bank stability monitoring analysis as claimed in claim 1 and appraisal procedure, is characterized in that: described step B specifically comprises:
Data acquisition: the point of monitoring a setting on wire taking erosion and deposition is as initial point, and corresponding embankment bank-protection works pile No., gathers a height value at a certain distance along monitoring wire;
Data processing: utilize EXCEL, AUTOCAD program to draw erosion and deposition monitoring wire elevation along journey variation diagram; Analyze the erosion and deposition monitoring wire place bed elevation of different times along journey variation diagram, calculate the amplitude of washing away or depositing by erosion and deposition monitoring wire place bed elevation variation characteristic segmentation.
3. bank stability monitoring analysis as claimed in claim 1 and appraisal procedure, is characterized in that: described step C specifically comprises:
Data acquisition: monitoring section under water slope ratio is that the segmental averaging of river course offshore slope is generally changed, offshore slope is divided into Underwater Slope and toe inner slope under water, Underwater Slope scope: Underwater Slope monitoring starting point wire is to the region between Underwater Slope monitoring terminal wire, toe inner slope scope under water: Underwater Slope monitoring terminal wire is to the region between erosion and deposition monitoring wire, monitoring section line and Underwater Slope monitoring starting point wire, the intersection point of Underwater Slope monitoring terminal wire is the raw data acquisition point of Underwater Slope slope ratio, calculate relevant monitoring section Underwater Slope slope ratio according to the bed elevation of 2 intersection points that gather with level interval, monitoring section line and Underwater Slope monitoring terminal wire, the intersection point of erosion and deposition monitoring wire is the raw data acquisition point of toe inner slope slope ratio under water, calculate relevant monitoring section toe inner slope slope ratio under water according to the bed elevation of 2 intersection points that gather with level interval,
Data processing: calculate the Underwater Slope slope ratio of each monitoring section, toe inner slope slope ratio under water, utilize that EXCEL, AUTOCAD program are drawn Underwater Slope slope ratio, toe inner slope slope ratio is along journey variation diagram under water; Analyze the slope ratio of different times along journey variation diagram, calculate division section Underwater Slope slope ratio, the amplitude of variation of toe inner slope slope ratio under water by slope than variation characteristic segmentation.
4. bank stability monitoring analysis as claimed in claim 1 and appraisal procedure, it is characterized in that: described bank stability risk assessment is divided into 4 grades: general, secondary is set up defences, one-level is set up defences, alert level, corresponding color tips is respectively: green bank section, blue bank section, orange early warning bank section, red early warning bank section.
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| CN106855637A (en) * | 2016-12-10 | 2017-06-16 | 国家海洋局第二海洋研究所 | Underwater Slope method for analyzing stability |
| CN111693039A (en) * | 2020-06-11 | 2020-09-22 | 黄河勘测规划设计研究院有限公司 | Root stone state sensing and monitoring system and monitoring method thereof |
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| CN113065768A (en) * | 2021-04-02 | 2021-07-02 | 长江航道规划设计研究院 | River bank protection building technical condition evaluation method based on multi-source multi-dimensional indexes |
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| CN114357912B (en) * | 2022-01-11 | 2022-09-16 | 湖南工程学院 | Stability analysis system of river bank slope |
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