CN103882867B - Against making the visual analysis method of permanent part column relative settlement under frame conditions - Google Patents
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Abstract
The present invention relates to a kind of against making the visual analysis method of permanent part column relative settlement under frame conditions, comprise the following steps: gather against making the settling data of permanent part column under frame conditions；Settling data is classified, comprehensively analyzes and examination；Settling data source is extracted and processing；Basic parameter is configured；Build elevation TIN triangle model；Make the visual analyzing figure group of column relative settlement；Column relative settlement trend analysis judges with section。Compared with prior art, the present invention can Rapid Implementation be inverse makes the visual analyzing of permanent part column relative settlement under framework supporting condition, obtain high accuracy, the visualization map achievement reflecting its relative settlement directly perceived, accurately, the clear and directly perceived relative settlement information expressing permanent part column, effective technical controlling measure is taked in time for abnormal conditions, reduce because of the excessive security risk bringing skyscraper agent structure of permanent part column relative settlement, there is certain practical value。
Description
Technical field
The present invention relates to the measured data in a kind of base pit engineering field and analyze method, especially relate to a kind of against making the visual analysis method of permanent part column relative settlement under framework supporting condition。
Background technology
For saving, intensive use soil, the center, city in a particularly line city, each big city builds skyscraper or high-rise building one after another, the scale of the project of its underground space development and architecture Foundation Pit Engineering constantly expands, and the difficulty of technique of design and construction constantly promotes, and engineering risk is also more and more higher。Outstanding problem for surrounding enviroment protection with land used contradiction; reverse construction multilayer basement of high-rise building or underground structure is adopted to arise at the historic moment; this method is utilized can more efficiently to protect foundation ditch surrounding enviroment, reduce foundation pit supporting project expense, accelerating construction progress, affect the conspicuous contradictions such as public transport; airborne dust, noise, high light etc. can be polluted simultaneously and be preferably minimized, therefore obtain in District of Shanghai and be increasingly widely applied。
Base pit engineering is a complicated large scale dynamic system, if the deformation locus of foundation pit supporting construction and the soil body can be embodied with visual pattern, the various states change of foundation ditch is expressed with computer graphic image form, then it is advantageous to find existence or potential problem in design, work progress by being, such that it is able to take in time to successfully manage measure。Certain achievement is achieved both at home and abroad at present in the research and enforcement of underground space three-dimensional visualization, three-dimensional formation analysis module such as US Geological Survey's exploitation, the three-dimensional informationization research and development that Osaka, Japan soil institute carries out in conjunction with Urban Underground exploitation and work progress, and the associated visualization research etc. that the unit such as domestic Shanghai Tongji University, Wuhan rock-soil mechanics institute, Dalian University of Technology carries out。In foundation ditch visualization, they think that the visual research emphasis of base pit engineering is to utilize current existing Visual calculation method and theory to express the mass data produced in engineering construction, the useful information explored and find in project data and implicit physical phenomenon thereof, and the problem found with institute is analyzed from the angle of underground engineering。This kind of base pit engineering method for visualizing can make full use of various result of calculation and project data, but it requires over the mathematical algorithm of complexity and relevant soil deformation parameter, cloud atlas color etc. is interpolated and is speculated, process involves substantial amounts of judgement and numerical computations, so that execution efficiency and effect are desirable all not to the utmost。
Ultra-large type framework against workmanship's method when, vertical member combines with stand column pile, is commonly called as " one pile for one column ", and the construction stage shelves a little as support, afterwards as structure base for post。In pit top-down, semi-inverse method foundation ditch excavation and construction, stand column pile there is also unloading rebound, on lift phenomenon, column relative settlement is objective reality。If there is bigger relative settlement between each stand column pile, then the floor built and girder system then can produce crack, and then jeopardize superstructure safety, and then the normal use of impact。Simultaneously, when the total difference sedimentation of all columns reaches certain numerical value, then must stop excavation of foundation pit immediately, can proceed after taking effective control measure, it is not only dangerous but also delay the duration that foundation ditch shelves period, have a strong impact on project progress and increase the risk of distortion of surrounding enviroment impact, therefore permanent part column need to strictly control its relative settlement。
For super-sized foundation pit engineering, from job site information-based monitoring early-warning angle, conventional permanent structure column monitoring generally provide only accumulative settling amount and the same day two significant data indexs of settling amount, its relative settlement information still can not be directly provided, in manifestation mode very not directly perceived, can not analyze in time, search and judge potential risk, it is necessary to take other technologies method that collection in worksite data are further analyzed。For above-mentioned situation, present invention is generally directed to the accumulative settling data of column obtained, different construction conditioned area is divided to carry out data classification, comprehensive analysis and rough error examination, make every effort to the relative settlement between high accuracy, reflection stand column pile directly perceived, the visualization figure group of its relative settlement is provided, analyze total difference sedimentation dynamic development trend further and judge maximum difference sedimentation section present position, extracting relative settlement information between required column。
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide that a kind of ultra-large type is inverse makes the visual analysis method of permanent part column relative settlement under framework supporting condition。
The purpose of the present invention can be achieved through the following technical solutions:
A kind of against making the visual analysis method of permanent part column relative settlement under frame conditions, the method comprises the following steps:
(1) gather against making the settling data of permanent part column under frame conditions:
Including gathering the measurement coordinate of permanent part column in each construction conditioned area, accumulative settling amount data source, method particularly includes: on permanent part column, lay observation station, use precise electronic level gauge, overall process at excavation of foundation pit to Superstructure Construction stage, by implementing collection in worksite and the altitude data of adjustment acquisition column, and calculate the accumulative settling data of each column, the accumulative sedimentation value δ of the i-th root posti=Hij-Hi0(HijFor the height value of field observation jth time, Hi0Elevation initial value for field observation the 1st time)。
Foundation ditch border column, trestle region column observation station be encrypted laying, site density cloth be set to 20～50m take one measure point。
(2) settling data classified, comprehensively analyze and examination:
According to precipitation respective in foundation ditch, shoveling, bed course, base plate different operating modes be divided into some subregions, classify according to the accumulative settling data of all subregion scope column, take in all subregion using data in the accumulative settling data maximum δ max or minima δ min of column 1/3 region being middle position as Main Analysis object, it is determined that Assessing parameters σ=M0(M0For error in the measurement of higher degree after compensating computation), set rough error discriminant critical value p=3 σ, comprehensively analyze according to the Normal Distribution Characteristics of mathematical statistics, reject the rough error point of the accumulative settlement values of column caused because of external condition interference。
(3) settling data source is extracted and processing:
Participate in every root post data source of graphic plotting all by three-dimensional coordinate (Xi,Yi,δi) mode extracts and process, wherein, (Xi,Yi) represent the measurement plane coordinates of each column, δiFor the accumulative settling amount of column obtained through actual measurement compensating computation under different working conditions；Detailed step is: in intrinsic foundation ditch column plane cad figure, the column gathering data is designed coordinate (x1, y1) extract；Meanwhile, coordinate system is independently measured by the foundation of axis in length and breadth of original design figure, it is stipulated that zero (X0,Y0) data；Convert to according to two-dimensional assemblage 4 parameter equation and independently measure coordinate (Xi,Yi)。
(4) basic parameter is configured:
Basic parameter includes column accumulative sedimentation maximum δ x, column accumulative sedimentation minima δ n, relative settlement datum level H0And sedimentation contour interval N；
Column accumulative sedimentation maximum δ x, column accumulative sedimentation minima δ n parameter: choose δ x=int (δ max), δ n=int (δ min) according to measured data；
Relative settlement datum level H0Parameter: when accumulative sedimentation value δ i>=0mm or the δ i of all columns<during 0mm, takes H0=int [(δ x+ δ n)/2]；When δ i exists positive and negative value simultaneously, take H0=0mm；
Sedimentation contour interval N parameter: when accumulative sedimentation value δ i>=0mm or the δ i of all columns<during 0mm, takes N=int [(δ x-δ n)/k], k according to the precision of visualized graphs, clear and aesthetic measure Rational choice integer value。
When δ i exists positive and negative value simultaneously, take N=int [(δ x+ δ n)/k]。
(5) elevation TIN triangle model is built:
According to the three-dimensional coordinate (X that adjacent three columns each after rough error examination extracti,Yi,δi) build sealene triangle TIN, analyze the reasonability of each TIN successively, it is judged that the rough error lines such as curve intersection, disconnection, exception and rough error region。To irrational TIN, reconstruction of should internal adding some points。
(6) the visual analyzing figure group of column relative settlement is made。
Visual analyzing figure group includes the visualization plane figure in each operating mode stage, relative settlement sectional drawing, local drawing and diagram of block。
(7) column relative settlement trend analysis judges with section。
According to the density degree of curve in visualization plane figure, analyze the total difference sedimentation regularity of distribution of all columns, and contrast with the visualization plane figure of previous operating mode, obtain the dynamic change trend information of relative settlement further, and " peak value ", " valley " data of adjacent stud are sequentially carried out and compare in curve is intensive or concentrated area, it is determined that all differences beyond controlling value settles section and judges the residing position of maximum difference sedimentation。
Compared with prior art, the present invention has the following advantages and beneficial effect:
The inverse permanent part column relative settlement made under framework supporting condition of ultra-large type must strictly control, by the inventive method can Rapid Implementation be inverse makes the visual analyzing of permanent part column relative settlement under framework supporting condition, obtain high accuracy, the visualization figure reflecting its relative settlement directly perceived forms fruit, accurately, the relative settlement information expressing permanent part column clear and directly perceived, analyze total difference sedimentation dynamic development trend further and judge position residing for maximum difference sedimentation section, effective technical controlling measure is taked in time for abnormal conditions, reduce because of the excessive security risk bringing skyscraper agent structure of permanent part column relative settlement, there is certain practical value。Meanwhile, popularization and application can relate to processing substantial amounts of house to other or ground occurs in the data process&analysis of relative settlement。
Accompanying drawing explanation
Fig. 1 is permanent part column coordinate data collection point and construction bridge, support system relevant position graph of a relation；
Fig. 2 is the elevation sealene triangle TIN model built；
Fig. 3 is second layer earth excavation operating mode column visualization plane figure and relative settlement sectional drawing；
Fig. 4 is the 4th layer of earth excavation operating mode column visualization plane figure and relative settlement sectional drawing；
Fig. 5 is second layer earth excavation column relative settlement local drawing；
Fig. 6 is the 4th layer of earth excavation column relative settlement local drawing；
Fig. 7 is permanent part column relative settlement diagram of block；
Fig. 8 is earth's surface, somewhere relative settlement visualization plane figure；
Fig. 9 is earth's surface, somewhere relative settlement diagram of block。
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail。
Embodiment 1
Pudong's ultra-large type framework is inverse makes engineering column relative settlement visual analyzing
This Deep Foundation Pit engineering excavation area about 4.5 ten thousand m2, it is about 251m, width about 187m, wherein the high building of high 80～190m will be built respectively in the region of 5 radius 19～21m。The excavation of foundation pit degree of depth is about 15m, basement three layers, adopts main building along the practice, podium framework reverse construction。This is inverse props up supporting system and basement floor effective integration as framework, total more than 1000, permanent structure column in foundation ditch, will result in superstructure column as relative settlement is excessive, the node place of beam and slab construction ftractures, and then affects house and normally use。Simultaneously, when column relative settlement reaches certain numerical value, then must stop excavation of foundation pit, can proceed after taking effective control measure, it is not only dangerous but also delay the duration that foundation ditch shelves period, having a strong impact on project progress and increase the risk of distortion of surrounding enviroment impact, therefore between column, the control of relative settlement is very strict, designing requirement is less than 20mm。By acquisition, arrangement and processing to this engineering column altitude data, obtain respectively second layer earth excavation complete, third layer earth excavation the column visualization plane figure in each operating mode stage, relative settlement sectional drawing, local drawing and diagram of block when completing to complete with the 4th layer of earth excavation。
The concrete technical scheme of visual analyzing:
Analyze and extract the measurement coordinate of permanent structure column in each construction conditioned area, accumulative settling amount data source, visual plane graph drawn to scale, relative settlement plane graph, the local figure group such as drawing and diagram of block, relative settlement information to energy image study object directly perceived, analyze the total difference sedimentation regularity of distribution of all columns, visualization plane figure under different working conditions is contrasted, obtain the dynamic change trend information of relative settlement further, determine the residing concrete position of maximum difference sedimentation section, for guide field working procedure adjustment and the control measure taking necessity。
A, column settling data gather:
Concrete technology require: for truly reflecting the relative settlement of column, foundation ditch border column, trestle region column observation station should suitably encrypt laying。Site density cloth is set to 20～50m。Adopt on 239 permanent part columns, lay observation station, use precise electronic level gauge, overall process at excavation of foundation pit to Superstructure Construction stage, by implementing collection in worksite and the altitude data of adjustment acquisition column, the tracking and monitoring time is about 2 years, and calculate the accumulative settling data of each column, the accumulative sedimentation value δ of the i-th root posti=Hij-Hi0(HijFor the height value of field observation jth time, Hi0Elevation initial value for field observation the 1st time)。
The relevant position relation of permanent part column and construction bridge, reinforced concrete support system is shown in Fig. 1, in Fig. 1, permanent part column 1 has 226 and participates in graphic plotting, and 2 represent foundation pit enclosure sideline, 3 represent reinforced concrete support system, and in figure, 4 represent construction bridge。
The classification of b, settling data, comprehensive analysis and rough error examination:
Concrete technology requires: mainly guarantee the accuracy of data source, it is to avoid the distortion of visualized graphs occur。It is divided into 8 sub regions according to the different operating mode such as respective precipitation, shoveling, bed course, base plate in foundation ditch, take in all subregion using the accumulative settling data maximum δ max or minima δ min of column 1/3 region being middle position as Main Analysis object, it is determined that Assessing parameters σ=M0=0.36, set rough error discriminant critical value p=3 σ=1.08, Normal Distribution Characteristics according to mathematical statistics is comprehensively analyzed, reject because of external condition disturb (as digging machine touch, measuring point destroy after Resurvey, other are abnormal) numerical value rough error point totally 13 point。
C, data source are extracted and processing:
Concrete technology requires: participate in 226 root post data sources of graphic plotting all by three-dimensional coordinate (Xi,Yi,δi) mode extracts and process。Wherein, (Xi,Yi) represent the measurement plane coordinates of each column, δiFor the accumulative settling amount of column obtained through actual measurement compensating computation under different working conditions。Detailed step is:
The column gathering data is designed coordinate (x by intrinsic foundation ditch column plane cad figure1, y1) extract；Meanwhile, coordinate system is independently measured by the foundation of axis in length and breadth of original design figure, it is stipulated that zero (X0,Y0) data；Convert to according to two-dimensional assemblage 4 parameter equation and independently measure coordinate (Xi,Yi), and create (period, Xi,Yi,δi) * .dat file。
D, basic parameter are arranged:
Basic parameter includes column accumulative sedimentation maximum δ x, column accumulative sedimentation minima δ n, relative settlement datum level H0And sedimentation contour interval N；
Concrete technology requires: for the 4th layer of earth excavation operating mode。Mainly there are column accumulative sedimentation maximum δ x, column accumulative sedimentation minima δ n, relative settlement datum level H0, sedimentation the parameter such as contour interval N, drafting scale。
Column accumulative sedimentation maximum δ x, column accumulative sedimentation minima δ n parameter: take δ x=+37mm, δ n=-1mm。
Relative settlement datum level H0Parameter: because δ i exists positive and negative value simultaneously, then take H0=0mm。
Sedimentation contour interval N parameter: according to the abundant, clear of visualized graphs and aesthetic measure, take k=19, by N=int [(δ x+ δ n)/k], then N=2mm。
Drafting scale is defined as 1:600。
E, structure TIN and editor:
Under cad drawing environment, determine graphic plotting Region control border according to foundation ditch border or survey region。The three-dimensional data extracted according to each adjacent three columns builds sealene triangle TIN model, sees Fig. 2, analyzes the reasonability of each TIN successively, it is judged that the rough error lines such as curve intersection, disconnection, exception and rough error region。To irrational TIN, reconstruction of should internal adding some points。
F, making relative settlement visual analyzing figure group:
By above-mentioned basic parameter, make the visualization plane figure of permanent part column relative settlement, relative settlement sectional drawing, local drawing, diagram of block etc. respectively according to computer machine aided drawing tool software。
Repeat d, e, f step, until drawing out the visualization plane figure (shown in Fig. 3) and maximum difference sedimentation sectional drawing (shown in Fig. 4), locally drawing (Fig. 5, Fig. 6) that meet the requirement in period of different operating mode；According to relative settlement datum level H0Diagram of block (Fig. 7) is drawn out with data file * .dat。
G. column Differential Settlement Analysis
At Rapid Implementation against making the visual analyzing of permanent part column relative settlement under framework supporting condition, obtain high accuracy, after the visualization figure reflecting its relative settlement directly perceived forms fruit, according to the density degree of curve in visualization plane figure, analyze the total difference sedimentation regularity of distribution of all columns, contrasted by the visualization plane figure of front and back difference operating mode, in conjunction with diagram of block (Fig. 7), obtain the dynamic change trend information of relative settlement further, and in curve is intensive or concentrated area " peak value " of adjacent stud, " valley " data are sequentially carried out and compare, determine that all differences beyond controlling value settles section and judges the residing position of maximum difference sedimentation, effective technical controlling measure is taken in time for abnormal conditions。
(1) visualization plane figure and maximum difference sedimentation fractograph analysis under each operating mode
Analysis chart 3 is known: under the working condition that second layer earth excavation completes, and in whole foundation ditch, the curve in permanent column relative settlement visualization plane figure is relatively sparse, uniform, without obvious close quarters, totally reflects that the relative settlement between each column is relatively small。Occurring at the A2 section being made up of LZ187 (No. 187 columns)～LZ189 (No. 189 columns) according to maximum difference sedimentation position between Fig. 3 column determined, relative settlement reaches 19.3mm；Next to that the A1 section being made up of LZ136～LZ156, relative settlement reaches 17.8mm。
Analysis chart 4 is known: under the 4th layer of working condition that earth excavation completes, and the close quarters of whole foundation ditch inner curve expands to some extent。Wherein, in whole foundation ditch the curve of the permanent column in middle and lower part the most intensive, concentrate, reflect that in this region, the relative settlement of each column is maximum。Wherein, settling position according to Fig. 4 column maximum difference determined and betide the C1 section being made up of LZ138～LZ161, relative settlement reaches 37.6mm；Next to that the C2 section being made up of LZ145～LZ164, relative settlement reaches 34.5mm。
(2) relative settlement local drawing analysis
For local, the keypoint part that larger difference settles occurs, the local drawing (Fig. 5, Fig. 6) under different operating mode can be drawn respectively, analyze slight change and the development trend at larger difference sedimentation position, local。
Analysis chart 5, Fig. 6 are known: second layer earth excavation is completed under the different working conditions that the 4th layer of earth excavation completes, the D1 section (Fig. 5) being made up of LZ138～LZ160 is changed to the E1 section (Fig. 6) being made up of LZ138～LZ161, relative settlement present position, local is varied from, and relative settlement is changed to 37.6mm by 14.8mm；And D2, E2 section being made up of LZ138～LZ160, position residing for the relative settlement of local does not change, but differential settlement is changed to 34.5mm by 12.4mm, adds 22.1mm。
(3) column relative settlement dynamic trend is analyzed
Simultaneously analysis chart 3, Fig. 4 are known: along with deepening continuously of excavation of foundation pit, under different working conditions the curve of reflection permanent part column relative settlement information from uniform, sparse progressively toward development trend intensive, that concentrate；Among position residing for maximum difference sedimentation section is also at being continually changing, its maximum difference settlement values is developed into 37.6mm by 19.3mm, and relative settlement adds 18.3mm (close to 1 times)；Carefully analyze these change in location, it may be concluded that for this engineering, maximum difference sedimentation occurs position always to occur from trestle district and the binding site with non-trestle district between column, it is necessary to emphasis gives more sustained attention。
Above-mentioned visualization figure form fruit and column between Differential Settlement Analysis conclusion through repeatedly providing in time, and take Control Measure timely and effectively according to this, greatly reduce and cause superstructure beam and slab construction node to occur cracking to affect the risk that house normally uses because relative settlement is excessive between permanent part column, tutorial messageization construction is served critical effect。
Embodiment 2
The visual analyzing of somewhere, Shanghai earth's surface relative settlement
The relative settlement general status on earth's surface in this region need to be assessed in somewhere, Shanghai, obtains the regional area that earth's surface deformation is bigger, analyzes area and is about 1.8 square kilometres。By setting up earth's surface observation station 147, GPS instrument is adopted to obtain (the X of each observation stationi, Yi) plane coordinates, within 6 months, follow the tracks of the measured data acquiring each earth's surface observation station respectively totally 13 times, obtain the altitude data H of observation station through adjustmenti、δi, it is respectively provided with parameter as follows: δ x=+14mm；δ n=-5mm；H0=0mm；N=int [(δ x+ δ n)/k]=1mm。
Earth's surface relative settlement visualization plane figure (see Fig. 8) is obtained through above-mentioned steps (1)～step (7)；According to relative settlement datum level H0Diagram of block (see Fig. 9) is drawn out with data file * .dat。Analysis chart 8, Fig. 9 can draw: within the scope of the boxed area judged in fig. 8, and the differential settlement on earth's surface is bigger。
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and use invention。These embodiments obviously easily can be made various amendment by person skilled in the art, and General Principle described herein is applied in other embodiments without through performing creative labour。Therefore, the invention is not restricted to above-described embodiment, those skilled in the art's announcement according to the present invention, the improvement made without departing from scope and amendment all should within protection scope of the present invention。
Claims (2)
1. inverse make the visual analysis method of permanent part column relative settlement under frame conditions for one kind, it is characterised in that the method comprises the following steps:
(1) gather against making the settling data of permanent part column under frame conditions, including gathering the measurement coordinate of permanent part column in each construction conditioned area, accumulative settling amount data source, method particularly includes:
Permanent part column is laid observation station, use precise electronic level gauge, in the overall process of excavation of foundation pit to Superstructure Construction stage, by implementing collection in worksite and the altitude data of the adjustment each column of acquisition, and calculate the accumulative settling amount of each column, the accumulative sedimentation value δ of the i-th root posti=Hij-Hi0, HijFor the height value of field observation jth time, Hi0Elevation initial value for field observation the 1st time；
(2) settling data classified, comprehensively analyze and rough error examination:
According to precipitation respective in foundation ditch, shoveling, bed course, base plate different operating modes be divided into some subregions, classify according to the accumulative settling data of all subregion scope column, take in all subregion and data occur in 1/3 region that maximum δ max or minima δ min is middle position as Main Analysis object using column accumulative settling data, it is determined that Assessing parameters σ=M0, wherein M0For error in the measurement of higher degree after compensating computation, set rough error discriminant critical value p=3 σ, comprehensively analyze according to the Normal Distribution Characteristics of mathematical statistics, reject the rough error point of the accumulative settlement values of column caused because external condition interference；
(3) settling data source is extracted and processing:
Every root post data source of graphic plotting is participated in all by three-dimensional coordinate (X after picking out rough error pointi,Yi,δi) mode extracts and process, wherein, (Xi,Yi) represent the measurement plane coordinates of each column, δiFor the accumulative settling amount of the i-th root post obtained through actual measurement compensating computation under different working conditions, detailed step is:
The column gathering data is designed coordinate (x by intrinsic foundation ditch column plane cad figure1, y1) extract；Meanwhile, coordinate system is independently measured by the foundation of axis in length and breadth of original design figure, it is stipulated that zero (X0,Y0) data；Convert to according to two-dimensional assemblage 4 parameter equation and independently measure coordinate (Xi,Yi)；
(4) basic parameter being configured, described basic parameter includes column accumulative sedimentation maximum δ x, column accumulative sedimentation minima δ n, relative settlement datum level H0And sedimentation contour interval N；
Column accumulative sedimentation maximum δ x, column accumulative sedimentation minima δ n parameter: choose δ x=int(δ max according to measured data), δ n=int(δ min)；
Relative settlement datum level H0Parameter: as the accumulative sedimentation value δ i >=0mm of all columns, take H0=int [(δ x+ δ n)/2]；When the accumulative sedimentation value δ i of all columns < during 0mm, takes H0=int [(δ x+ δ n)/2]；When δ i exists positive and negative value simultaneously, take H0=0mm；
Sedimentation contour interval N parameter: as the accumulative sedimentation value δ i>=0mm of all columns, take N=int [(δ x-δ n)/k], when the accumulative sedimentation value δ i of all columns is<during 0mm, take N=int [(δ x-δ n)/k], k according to the precision of visualized graphs, clear and aesthetic measure Rational choice integer value；
When δ i exists positive and negative value simultaneously, take N=int [(δ x+ δ n)/k]；
(5) elevation TIN triangle model is built:
According to the three-dimensional coordinate (X that adjacent three columns each after rough error examination extracti,Yi,δi) build sealene triangle TIN, analyze the reasonability of each TIN successively, it is judged that curve intersection, disconnection rough error line and rough error region, to irrational TIN, reconstruction of should internal adding some points；
(6) making the visual analyzing figure group of column relative settlement, described visual analyzing figure group includes the plane graph in each operating mode stage, relative settlement sectional drawing, diagram of block and local drawing；
(7) column relative settlement trend analysis judges with section:
According to the density information of curve in visualization plane figure, analyze the total difference sedimentation regularity of distribution of all columns, and contrast with the visualization plane figure of previous operating mode, obtain the dynamic change trend information of relative settlement further, and " peak value ", " valley " data of adjacent stud are sequentially carried out and compare in curve is intensive or concentrated area, it is determined that all differences beyond controlling value settles section and judges the residing position of maximum difference sedimentation。
2. according to claim 1 a kind of against making the visual analysis method of permanent part column relative settlement under frame conditions, it is characterized in that, foundation ditch border column, trestle region column observation station be encrypted laying, site density cloth be set to 20 ~ 50m take one measure point。
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