CN102607646A - 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 the hydraulic engineering technical field, specifically is a kind of bank stabilization property monitoring analysis and appraisal procedure.
Background technology
Collapse on the bank is a kind of form of expression of channel change; Be prevalent in the river course, river plain; The not only just relevant location of the influence of bank line avalanche beach " is nibbled " disappearance gradually; The particularly important is collapse on the bank and jeopardize the dyke building basis safety of construction on beach, and then the people's security of the lives and property that is threatening the levee protection district, affect the socioeconomic normal development of normal utilization and levee protection district of river course coastline resource development and use, two sides, river course water conservancy projects.The channel revetment engineering is to keep or control the stable a kind of effective measures of river course water front; Be widely used in river plain river regulation engineering; Construction work with all is the same, and the channel revetment engineering is not to put things right once and for all, have yet its natural life-span, bank-protection works especially under water; It is influence the channel revetment engineering principal element of natural life-span that damaged or destroyed by flood destroys, the bank slope that loses the bank-protection works protection apart from the date that collapse on the bank takes place with regard within sight.
At present to handle be the improvement after the collapse on the bank to the bank stabilization risk basically, still difficulty accomplishes to nip in the bud, consequently loss occurrence, and the difficulty of bank slide treatment and scale have the difficulty and the scale of maintenance reinforcing of important requirement much bigger than routine property.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 the stable effect of safeguarding the riverbank, can avoid serious accident generations such as flood control.Analysis and evaluation bank stabilization degree of risk is to confirm that the bank stabilization risk handles important evidence, and the flood control work in river course is had directive function.
Summary of the invention
Technical matters to be solved by this invention provides a kind of bank stabilization property monitoring analysis and appraisal procedure; Can in time find the river course, river plain; Especially the degree of the bank stabilization risk of reservoir dam downstream river course and the trend of variation are direct for there to be the Risk Governance of potential safety hazard bank section that the technological guidance is provided; For safety managements such as the flood control safety of relevant dyke building protected location, section, the water conservancy projects safe operation of two sides, river course provide technical support.
A kind of bank stabilization property monitoring analysis and appraisal procedure comprise the steps:
Steps A: set up based on the monitoring lead of offshore bed configuration figure and the Monitoring Data collection network of offshore river bed water descending slope analysis section; Wherein monitoring lead has 3, is respectively the monitoring lead that dash to become silted up, slope monitoring starting point lead, slope monitoring terminal point lead under water under water; Gradient analysis section is arranged on demand under water, and general 50～300m at interval arranges 1 monitoring analysis section;
Step B: offshore bed configuration figure is a basic document with the river course; The topomap that liquidating silt monitoring lead belongs to position, offshore riverbed, river course carries out digitized processing; According to the outcome data data that is obtained; Draw and dash the bed elevation variation relation figure of silt monitoring lead, and calculate each segmentation elevation change mean value along Parallel to the flow direction;
Step C: offshore bed configuration figure is a basic document with the river course; The topomap that the intersection point of the monitoring analysis section of monitoring lead and vertical streamflow direction is belonged to position, offshore riverbed, river course carries out digitized processing; According to the outcome data data that is obtained; Draw the variation relation figure of side slope under the offshore river bed water, toe inner slope slope ratio longshore current journey, and calculate each segmentation slope average of relatives value;
Step D: according to above-mentioned analysis results; And combine the geological boundry condition on riverbank and river gesture runoff external force condition, water front situation and river, section, analysis and evaluation bank section place gesture to develop key element; By bank stabilization venture influence factor classification grade scoring detailed rules and regulations; Analysis and evaluation bank section is carried out classification grade compose branch, calculate the comprehensive score value of composing then, wherein river course bank slope geologic structure and shore protection situation are to influence the stable geological boundry condition of bank line; By comprehensive interval of composing score value place bank stability property risk class, confirm the bank stability property risk class in corresponding location.
The present invention has following beneficial effect:
(1) can be comprehensively directly reflection monitoring bank section offshore along the line riverbed dash the silt situation of change; Overcome the typical section method and analyze the representative limitation that the offshore riverbed changes; Reach can directly find to monitor bank section offshore riverbed dash become silted up change along journey (Parallel to the flow direction) distribution relation, have the characteristics of overall quantitative analysis;
(2) can be comprehensively the direct situation of change of side slope and toe inner slope under the reflection monitoring bank section offshore river bed water along the line, reach can directly find to monitor the variation of bank section offshore river bed water descending slope along journey (Parallel to the flow direction) distribution relation, have the characteristics of overall quantitative analysis.
(3) bank stabilization property is carried out objective evaluation, the possibility that prediction riverbank collapse on the bank takes place, improvement provides scientific basis with the collapse on the bank dangerous situation for prevention river course collapse on the bank dangerous situation, for the safety management in river course provides technical support.
Description of drawings
Fig. 1 is the arrangenent diagram of offshore riverbed, mouth location, north gate monitoring lead and monitoring section;
Fig. 2 is to be example with mouth location, north gate, Jingjiang section, the Changjiang river, and offshore riverbed monitoring section is side slope, toe inner slope subregion synoptic diagram under water;
Fig. 3 is to be example with mouth location, north gate, Jingjiang section, the Changjiang river, and toe forward position monitoring lead elevation is along the journey variation diagram under the offshore river bed water;
Fig. 4 is to be example with mouth location, north gate, Jingjiang section, the Changjiang river, and side slope slope ratio is along the journey variation diagram under the offshore river bed water;
Fig. 5 is to be example with mouth location, north gate, Jingjiang section, the Changjiang river, and toe inner slope slope ratio is along the journey variation diagram under the offshore river bed water.
Embodiment
To combine the accompanying drawing among the present invention below, the technical scheme among the present invention will be carried out clear, intactly description.
Bank stabilization property monitoring analysis of the present invention and appraisal procedure comprise the steps:
Steps A: set up based on the monitoring lead of offshore bed configuration figure and the Monitoring Data collection network of offshore river bed water descending slope analysis section; The monitoring lead has 3, is respectively the monitoring lead that dash to become silted up, slope monitoring starting point lead, slope monitoring terminal point lead under water under water; Gradient analysis section is arranged on demand under water, and general 50～300m at interval arranges 1 monitoring analysis section.
Take all factors into consideration following content element when confirming the plane coordinates position of the said monitoring lead that dash to become silted up: 1. to have the river course under water the need of bank-protection works consider the width of channel revetment Underwater Engineering, the planimetric position that dashes the monitoring lead that becomes silted up is apart from 5～30 meters of the outer rims of channel revetment Underwater Engineering; 2. do not have the channel revetment location of bank-protection works under water, the inward flange line-spacing of pressing the offshore deep trouth width of average low water bit line for many years confirms to dash the planimetric position of monitoring lead of becoming silted up, and the planimetric position that dashes the monitoring lead that becomes silted up 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 the offshore main stream line smooth and easy, suitably the planimetric position of the monitoring lead that becomes silted up is dashed in adjustment, makes that to dash the monitoring lead that becomes silted up smooth and easy.
Consider following content element when confirming the plane coordinates position of the said starting point of slope monitoring under water lead: the bed elevation of the position, reference mark on the lead is lower than average for many years low water level 2～3m;
Consider following content element when confirming the plane coordinates position of the said terminal point of slope monitoring under water lead: the position, reference mark on the lead is that near the fracture morphology the toe changes near " flex point ";
To the north of the doorway section be example (as shown in Figure 1), north gate mouth monitoring bank section length overall 6km, wherein pile No. 6+000～9+000 section (long 3km) is the bank-protection works section, under water bank-protection works width 60m～80m; Pile No. 9+000～12+000 section (long 3km) is bank-protection works section not.Dashing the monitoring lead that becomes silted up is a smooth-going multiple spot curve; Be positioned near the channel revetment section Underwater Engineering forward position and near river course not the inward flange line of shore protection section offshore deep trouth; The basic assurance through the offshore deep trouth; Its surface level position is apart from low water level 25.6m (the 85 Huanghai Sea basal plane) about 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 utilization back) to the March 12～next year of every year between in Dec, 2011.By above-mentioned layout monitoring lead content request, confirm north gate mouth section under water slope monitoring starting point lead, under water slope monitoring terminal point lead, dash the monitoring lead that becomes silted up, see Fig. 1 for details; Gradient analysis section is arranged 1 monitoring analysis section by interval 200m under water, sees Fig. 1 for details.
Step B: offshore bed configuration figure is a basic document with the river course; The topomap that liquidating silt monitoring lead belongs to position, offshore riverbed, river course carries out digitized processing; According to the outcome data data that is obtained; Draw and dash the bed elevation variation relation figure of silt monitoring lead, and calculate each segmentation elevation change mean value along Parallel to the flow direction;
Said step B specifically comprises:
Data acquisition: the point (for example: monitor top, lead upper reaches point) with a setting on the monitoring lead is an initial point, and corresponding embankment bank-protection works pile No. is gathered a height value at a certain distance along the monitoring lead.
Data processing: utilize EXCEL, AUTOCAD program to draw monitoring lead elevation along journey variation diagram (as shown in Figure 3); The monitoring lead elevation of analyzing different times calculates the amplitude that each section washes away or deposits along the journey variation diagram by the segmentation of monitoring lead elevation change characteristic.
Step C: offshore bed configuration figure is a basic document with the river course; The topomap that the intersection point of the monitoring analysis section of monitoring lead and vertical streamflow direction is belonged to position, offshore riverbed, river course carries out digitized processing; According to the outcome data data that is obtained; Draw the variation relation figure of side slope under the offshore river bed water, toe inner slope slope ratio longshore current journey, and calculate each segmentation elevation change mean value;
Said step C specifically comprises:
Data acquisition: the sloping under water ratio of monitoring section is that the segmental averaging of river course offshore slope is generally changed, and offshore slope is divided into side slope and toe inner slope under water under water.Side slope scope under water: slope monitoring starting point lead to the zone between slope monitoring terminal point lead under water under water; Toe inner slope scope under water: slope monitoring terminal point lead is to dashing the zone of becoming silted up between the monitoring lead under water.Monitoring section line and slope monitoring starting point lead under water, the intersection point of slope monitoring terminal point lead be the raw data acquisition point of the sloping ratio of side slope under water under water; Read horizontal range between each collection point bed elevation and at 2, calculate the relevant monitoring section sloping ratio of side slope under water according to the bed elevation and the level interval of 2 intersection points of gathering.The monitoring section line with slope monitoring terminal point lead under water, the intersection point that dashes the monitoring lead that becomes silted up be the raw data acquisition point of the sloping ratio of toe inner slope under water; Read horizontal range between each collection point bed elevation and at 2, calculate the relevant monitoring section sloping ratio of toe inner slope under water according to the bed elevation and the level interval of 2 intersection points of gathering.
Data processing: calculate the side slope under water slope ratio of each monitoring section, toe inner slope slope ratio under water, utilize EXCEL, AUTOCAD program to draw to supervise under water side slope slope ratio, toe inner slope slope ratio is along journey variation diagram (see Fig. 4 for details, shown in 5) under water; The sloping ratio of analyzing different times is along the journey variation diagram, calculates than variation characteristic segmentation by the slope and divides section side slope slope ratio, the amplitude of variation of toe inner slope slope ratio under water under water.
Step D: according to above-mentioned analysis results; And combine the geological boundry condition on riverbank and river gesture runoff external force condition, water front situation and river, section, analysis and evaluation bank section place gesture to develop key element; By bank stabilization venture influence factor classification grade scoring detailed rules and regulations; Analysis and evaluation bank section is carried out classification grade compose branch, calculate the comprehensive score value of composing of assessment then, wherein river course bank slope geologic structure and shore protection situation are to influence the stable geological boundry condition of bank line; By comprehensive interval of composing score value place bank stability property risk class, confirm the bank stability property risk class in corresponding location.The 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.The river gesture is the relativeness of channel line and riverbank, middle bar (beach) edge line.Said river gesture develops key element and comprises: the set up defences planimetric position of bank line and middle bar (beach) edge line under the water level condition of the mobility scale of channel line planimetric position, river flood control.
Bank stabilization venture influence factor classification grade scoring detailed rules and regulations:
Classification grade characteristic scoring clause detailed rules and regulations are divided into: condition flag clause, flush characteristic clause and water front situation characteristic clause, and the tax of every type of 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 influence the stable geological boundry condition of bank line, and river gesture characteristics of Runoff is to influence bank line to stablize the external force condition.The comprehensive scores of condition flag clause adopts method of weighted mean, and wherein, the geological boundry condition accounts for 70%, and river gesture runoff external force condition accounts for 30%; The score value that bank line is stablized the 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.Compose to divide in the face of the condition flag clause down and illustrate as follows:
1) bank slope geologic structure situation grade clause:
Ground-1: go up the sticking diadactic structure of sand down, 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: the loam structure, compose score value 2;
Ground-5: old caly structure, compose score value 5;
Ground-6 rock textures are composed score value 10.
2) shore protection situation grade clause:
Protect-0: shore protection section not, compose score value 0;
Protect-the former bank-protection works of implementing of 1:1998, unguyed after 1998, compose score value+2;
Protect-the former bank-protection works of implementing of 2:1998, reinforced under water in 1999～2003, slope protection works transformation waterborne, existing intact basically, compose score value+3;
Protect-the former bank-protection works of implementing of 3:1998, reinforcing, slope protection works transformation waterborne under water in 2006～2009, existing intact basically, compose score value+5;
Protect-the former bank-protection works of implementing of 4:1998, reinforcing, slope protection works transformation waterborne under water in 2010～2011, existing intact basically, compose score value+4;
The new bank-protection works of protecting-5:1999～implementing in 2003, unguyed after 2003, slope protection works waterborne is intact basically at present, composes score value+5;
The new bank-protection works of protecting-6:1999～implementing in 2003, unguyed after 2003, the many places breakage appears in slope protection works waterborne, composes score value+4;
The new bank-protection works or the reinforcing engineering that protect-7:2006～implemented in 2009, slope protection works waterborne is intact basically at present; Compose score value+6;
The new bank-protection works of protecting-8:2010～implementing in 2011, existing intact, compose score value+7.
3) river gesture runoff external force condition situation grade clause:
River-0: a section, monitoring section place (scope: the upper reaches 5km of monitoring section upper end is to the downstream 3km of monitoring section lower end, down with) river gesture is stable, and score value 0 is composed in the non-mainstream subsides bank in monitored area district;
River-1: river, section, monitoring section place gesture is stable, and the seasonal straight transition section that pastes stream is composed score value-1;
River-2: river, section, monitoring section place gesture is basicly stable, and score value-2 is composed towards the bend section in the seasonal stream top of pasting;
River-3: river, section, monitoring section place gesture has obvious adjustment, pastes the stream top towards the bend section throughout the year, composes score value-3.
2, flush characteristic 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 that calculates among the above-mentioned steps B) is 0～-7, and the score value of offshore slope situation of change (be the side slope under water slope ratio that calculates among the above-mentioned steps C, the amplitude of variation of toe inner slope slope ratio) under water is 0～-3, and the score value of flush characteristic clause adopts arithmetic summation measurement principle.Illustrate as follows washing away process feature clause tax branch below:
1) offshore channel scour intensity grade clause:
Dash-during 0:2006 year 10～Dec in May to 2011, the section of toe forward position alluvial is under water composed score value 0.
Dash-during 1:2006 year 10～Dec in May to 2011, score value-1 in the dark 3.0m of favourable opposition, is composed on average in dark 2.0m in the toe forward position under water;
Dash-during 2:2006 year 10～Dec in May to 2011, score value-3 on average in dark 2.0～4.0m, the dark 4.0～6.0m of favourable opposition, is composed in the toe forward position under water;
Dash-during 3:2006 year 10～Dec in May to 2011, the toe forward position is on average towards dark 4.0～6.0m under water; The dark 6.0～9.0m of favourable opposition composes score value-5;
Dash-during 4:2006 year 10～Dec in May to 2011, the toe forward position is on average towards more than the dark 6.0m under water; More than the dark 9.0m of favourable opposition, compose score value-7;
Dash-during 5:2006 year 10～Dec in May to 2010, the toe forward position is on average towards dark 4.0～6.0m under water, and 2008 10～Dec to 2011, year 10～Dec, 3 hydrology phases all washed away, and composed score value-5;
Dash-6:1998 is since September, and rock head scour pit is the expansion trend of washing away, and scour pit area in 2011 reaches or near the maximal value that has had since the record, composes score value-7;
Dash-7:1998 is since September, and rock head scour pit is towards dark trend, and scour pit minimum point elevation in 2011 reaches or near the minimum point that has had since the record, composes score value-7;
2) offshore channel gradient situation grade clause:
During slope-1:2007 year Dec in October to 2011, side slope mean inclination value is less than 0.33 (1: 3) under water, do not have steepening trend in nearly 3 years; The toe inner slope is mild, composes score value 0;
During slope-2:2007 year Dec in October to 2011, side slope mean inclination value is less than 0.33 (1: 3) under water, and steepening trend was arranged in nearly 3 years; Or the toe inner slope has steepening trend; Compose score value-1;
During slope-3:2007 year Dec in October to 2011, side slope mean inclination value 0.33～0.5 (1: 2) did not under water have steepening trend in nearly 3 years; The toe inner slope does not have steepening trend, composes score value-2;
During slope-4:2007 year Dec in October to 2011, the toe inner slope had steepening trend in nearly 3 years under water, composed score value-2.
During slope-5:2007 year Dec in October to 2011, side slope mean inclination value had steepening trend, and composed score value-3 greater than 0.5 (1: 2) in nearly 3 years under water.
3, water front situation characteristic scoring clause
Be bank line avalanche situation, the bank line avalanche is the result that bank line is stablized the concentration of risk outburst, and the score value of water front situation characteristic clause (bank line avalanche) is 0～-10.Following opposite bank wire condition characteristic clause is composed to divide and is illustrated as follows:
Collapse-0: collapse on the bank do not occur in nearest 5 years of the shore protection section (hydrologic year, down with), the shore protection section obvious damaged or destroyed by flood do not occur in nearest 5 years or the bank slope cunning is frustrated, composes score value 0;
Collapse-1: from beyond people's dike engineering 200m, the shore protection section a small amount of collapse on the bank point do not occur in nearest 3 years; A small amount of damaged or destroyed by flood occurs in nearest 3 years of the shore protection section or bank is hung in low water platform forward position, and collapse on the bank point is not repaired tax score value-2;
Collapse-2: from beyond the main dike engineering 200m, the shore protection section a small amount of collapse on the bank point do not occur in nearest 3 years; A small amount of damaged or destroyed by flood occurs in nearest 3 years of the shore protection section or the bank slope cunning is frustrated, and collapse on the bank point is not repaired tax score value-3;
Collapse-3: from people's dike engineering 100～200m, the shore protection section more collapse on the bank point occurs in nearly 3 years, and the shore protection section a small amount of bank slope cunning occurs in nearly 3 years and frustrates, and collapse on the bank or bank slope cunning are frustrated in the scope of each 250m of upstream and downstream, compose score value-4;
Collapse-4: from main dike engineering 100～200m, the shore protection section more collapse on the bank point occurs in nearly 3 years, and the shore protection section a small amount of bank slope occurs in nearly 3 years or low water platform cunning is frustrated, and collapse on the bank or bank slope cunning are frustrated in the scope of each 250m of upstream and downstream, compose score value-5;
Collapse-5: in people's dike engineering 100, the shore protection section more collapse on the bank point occurs in preceding 3 years, and the shore protection section a small amount of bank slope cunning occurs in nearly 3 years and frustrates, and collapse on the bank or bank slope cunning are frustrated in the scope of each 250m of upstream and downstream, compose score value-6;
Collapse-6: from beyond the main dike engineering 200m, the shore protection section a large amount of collapse on the bank points do not occur in nearest 3 years, composes score value-7;
Collapse-7: from beyond people's dike engineering 200m, the shore protection section a large amount of collapse on the bank points do not occur in nearest 3 years, composes score value-6;
Collapse-8: in the main dike engineering 100, the shore protection section more collapse on the bank point occurs in preceding 3 years, and the shore protection section a small amount of bank slope occurs in preceding 3 years or low water platform cunning is frustrated, and collapse on the bank or bank slope cunning are frustrated in the scope of each 250m of upstream and downstream, compose score value-7;
Collapse-9: occur collapse on the bank then, with interior water front, compose score value-7 from people's dike engineering 100m.
Collapse-10: occur collapse on the bank then, with interior water front, compose score value-8 from main dike engineering 100m.
Collapse-11: occur collapse on the bank then or the bank slope cunning is frustrated, with interior water front, compose score value-9 from people's dike engineering 50m.
Collapse-12: occur collapse on the bank then or the bank slope cunning is frustrated, with interior water front, compose score value-10 from main dike engineering 50m.
Bank stability property comprehensive scores computing method
The characteristic that is shown according to the factor that influences the bank stability risk and different phase risk; Be divided into the assessment of condition flag clause, flush characteristic clause and water front situation characteristic clause and compose score value, according to condition (weight 30%), process (weight 30%) and as a result clause (weight 40%) method of weighted mean bank line stability is assessed.See table 1.
Table 1 bank stability sexual factor score value assessment weight distribution table
| Provision name | The condition flag clause | Flush characteristic clause | Water front situation |
| Weight | |||
| 30％ | 30％ | 40％ |
River course bank stability property risk class division methods
The comprehensive assessment of monitoring bank section bank stability property risk class is according to the bank stability property comprehensive assessment score value of monitoring bank section, and the actual conditions of corresponding each bank section are confirmed river course bank stability property risk class comprehensive assessment score value scope, see table 2.
Table 2 river course bank stability property risk class comprehensive assessment score value scope statistical form
| The 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 |
| The color early warning | Green bank section | Blue bank section | Orange early warning bank section | Red early warning bank section |
| The comprehensive scores scope | Greater than 0 | 0～-2.0 | -2.0～-3.0 | Less than-3.0 |
According to above-mentioned bank stabilization venture influence factor classification grade scoring detailed rules and regulations; The concrete condition of contrast north gate mouth section, comprehensive assessment river course bank slope condition flag, flush characteristic, water front situation characteristic are composed score value and are calculated comprehensive scores the grade of this section bank stability influence.See table 3 for details.
The score value statistical form is composed in the bank stability property venture influence assessment of mouth section river course, table 3 north gate
Press mouth section river course, the north gate bank stability property venture influence assessment of table 2 river course bank stability property risk class comprehensive assessment score value scope and table 3 and compose the stable grade that score value is divided mouth section river course, north gate bank slope.See table 4 for details.
The stable grade statistical form of mouth section river course, table 4 north gate bank slope
Application example
At present this method has begun to be applied to the river gesture monitoring analysis work of Jingjiang section, middle reaches, the Changjiang river, is used for analysis and evaluation Three Gorges Reservoir retaining utilization back to the influence of Jingjiang bank stabilization property, for collapse on the bank diaster prevention and control planning in river course provides service.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who belongs to the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (5)
1. bank stabilization property monitoring analysis and appraisal procedure is characterized in that comprising the steps:
Steps A: set up based on the monitoring lead of offshore bed configuration figure and the Monitoring Data collection network of offshore river bed water descending slope analysis section; Wherein monitoring lead has 3, is respectively the monitoring lead that dash to become silted up, slope monitoring starting point lead, slope monitoring terminal point lead under water under water; Gradient analysis section is arranged on demand under water, and general 50～300m at interval arranges 1 monitoring analysis section;
Step B: offshore bed configuration figure is a basic document with the river course; The topomap that liquidating silt monitoring lead belongs to position, offshore riverbed, river course carries out digitized processing; According to the outcome data data that is obtained; Draw and dash the bed elevation variation relation figure of silt monitoring lead, and calculate each segmentation elevation change mean value along Parallel to the flow direction;
Step C: offshore bed configuration figure is a basic document with the river course; The topomap that the intersection point of the monitoring analysis section of monitoring lead and vertical streamflow direction is belonged to position, offshore riverbed, river course carries out digitized processing; According to the outcome data data that is obtained; Draw the variation relation figure of side slope under the offshore river bed water, toe inner slope slope ratio longshore current journey, and calculate each segmentation slope average of relatives value;
Step D: according to above-mentioned analysis results; And combine the geological boundry condition on riverbank and river gesture runoff external force condition, water front situation and river, section, analysis and evaluation bank section place gesture to develop key element; By bank stabilization venture influence factor classification grade scoring detailed rules and regulations; Analysis and evaluation bank section is carried out classification grade compose branch, calculate the comprehensive score value of composing then, wherein river course bank slope geologic structure and shore protection situation are to influence the stable geological boundry condition of bank line; By comprehensive interval of composing score value place bank stability property risk class, confirm the bank stability property risk class in corresponding location.
2. bank stabilization property monitoring analysis as claimed in claim 1 and appraisal procedure; It is characterized in that: take all factors into consideration following content element when confirming the said plane coordinates position that dashes the monitoring lead that becomes silted up in the said steps A: 1. to the location of bank-protection works under water, river course is arranged, the planimetric position that dashes the monitoring lead that becomes silted up is apart from 5～30 meters of the outer rims of channel revetment Underwater Engineering; 2. do not have the channel revetment location of bank-protection works under water, the inward flange line-spacing of pressing the offshore deep trouth width of average low water bit line for many years confirms to dash the planimetric position of monitoring lead of becoming silted up, and the planimetric position that dashes the monitoring lead that becomes silted up 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 the offshore main stream line smooth and easy, suitably the planimetric position of the monitoring lead that becomes silted up is dashed in adjustment, makes that to dash the monitoring lead that becomes silted up smooth and easy; Take all factors into consideration following content element when confirming the plane coordinates position of the said starting point of slope monitoring under water lead in the said steps A: the bed elevation of the position, reference mark on the lead is lower than average for many years low water level 2～3m; Take all factors into consideration following content element when confirming the plane coordinates position of the said terminal point of slope monitoring under water lead in the said steps A: the position, reference mark on the lead is that near the fracture morphology the toe changes near " flex point ".
3. bank stabilization property monitoring analysis as claimed in claim 1 and appraisal procedure is characterized in that: said step B specifically comprises:
Data acquisition: the point to dash a setting on the monitoring lead that becomes silted up is an initial point, and corresponding embankment bank-protection works pile No. is gathered a height value at a certain distance along the monitoring lead;
Data processing: utilize EXCEL, AUTOCAD program to draw and dash the monitoring lead elevation that becomes silted up along the journey variation diagram; Analyze dashing of different times and become silted up monitoring lead place bed elevation, calculate the amplitude of washing away or depositing by dashing the monitoring lead place's bed elevation variation characteristic segmentation of becoming silted up along the journey variation diagram.
4. bank stabilization property monitoring analysis as claimed in claim 1 and appraisal procedure is characterized in that: said step C specifically comprises:
Data acquisition: the sloping under water ratio of monitoring section is that the segmental averaging of river course offshore slope is generally changed; Offshore slope is divided into side slope and toe inner slope under water under water, side slope scope under water: slope monitoring starting point lead to the zone between slope monitoring terminal point lead under water under water; Toe inner slope scope under water: slope monitoring terminal point lead is to dashing the zone of becoming silted up between the monitoring lead under water; Monitoring section line and slope monitoring starting point lead under water, the intersection point of slope monitoring terminal point lead be the raw data acquisition point of the sloping ratio of side slope under water under water; Bed elevation according to 2 intersection points of gathering calculates relevant monitoring section side slope slope ratio under water with level interval; The monitoring section line with slope monitoring terminal point lead under water, the intersection point that dashes the monitoring lead that becomes silted up be the raw data acquisition point of toe inner slope slope ratio under water, according to the bed elevation of 2 intersection points of gathering and the relevant monitoring section of the level interval calculating sloping ratio of toe inner slope under water;
Data processing: calculate the side slope under water slope ratio of each monitoring section, toe inner slope slope ratio under water, utilize that EXCEL, AUTOCAD program are drawn under water side slope slope ratio, toe inner slope slope ratio is along the journey variation diagram under water; The sloping ratio of analyzing different times is along the journey variation diagram, calculates than variation characteristic segmentation by the slope and divides section side slope slope ratio, the amplitude of variation of toe inner slope slope ratio under water under water.
5. bank stabilization property monitoring analysis as claimed in claim 1 and appraisal procedure; It is characterized in that: said 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.
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| 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 |
| CN112362106A (en) * | 2020-11-13 | 2021-02-12 | 同济大学 | Gradable response slope monitoring method, device and apparatus and readable storage medium |
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| CN113177693A (en) * | 2021-04-06 | 2021-07-27 | 长江水利委员会水文局长江下游水文水资源勘测局(长江水利委员会水文局长江下游水环境监测中心) | Landslide monitoring and early warning assessment method based on analytic hierarchy process |
| CN113177693B (en) * | 2021-04-06 | 2024-06-11 | 长江水利委员会水文局长江下游水文水资源勘测局(长江水利委员会水文局长江下游水环境监测中心) | Method for monitoring, early warning and evaluating bank collapse based on analytic hierarchy process |
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