CN102967481B - Method for determining function relation between ground building and underground structure - Google Patents

Abstract

The invention belongs to the field of building safety state detection technologies, and relates to a method for determining a function relation between a ground building and an underground structure. The method comprises the steps of determining the graph amplification, contraction and translation on the basis of an ArcGIS software platform, mutually inquiring a graph and attribute data and together displaying on a same interface, displaying the analysis and evaluation result in forms of graph, table, document and the like, evaluating the blast vibration safety, statically and dynamically computing the surface deformation, computing the dead load pressure ring of the ground building, evaluating the damage of the ground building, evaluating the damage of the underground structure, rasterizing the vector data and vectoring the raster data, and expanding a common numerical simulation software interface. The method is reliable in determination principle, simple in determination step, high in determination precision, advanced in determination technological equipment and good in stability, and can be widely used for determining and prewarning the safety function relations of various ground buildings and underground structures.

Description

A kind of surface structures and underground structure interactively assay method

Technical field:

The invention belongs to building safety state inspection field, relate to the interactively of a kind of above ground structure and subsurface geologic structures and the test and evaluation system of safe condition, particularly surface structures and a underground structure interactively assay method, to realize measuring infrastructure engineering to the impact of the contiguous existing building safety in ground and ground engineering construction to the impact closely connecing existing underground structure safety.

Background technology:

Between the economy quick rise period, owing to being subject to resource restriction, effectively using underground space becomes the task of top priority on a large scale.According to statistics, end to 10 the end of month in 2012, China has built up railway tunnel more than 7000 kilometers, is building about 4600 kilometers; Built vcehicular tunnel more than 2900 kilometers, and is increasing with the speed of annual more than 150 kilometers; China's subway total kilometrage has reached more than 1600 kilometer, and within 2015, operation mileage will more than 3000 kilometers, and the year two thousand twenty planning total kilometrage will more than 6000 kilometers.Meanwhile, the civil air defense constructions and installations of underground, underpass, parking lot, market and bunker also increase gradually.The vibration that explosion in these infrastructure engineerings produces and surge pressure, neighboring buildings is had an impact safely, the excavation of underground works inevitably can cause the displacement of upper overlying strata soil layer, be out of shape the environmental effects such as even inbreak, these effects feed through to the geology harm such as sedimentation occurs Hui Shi ground, ground, side slope produces slippage or ground burst is subsided, and to the infringement in various degree of ground buildings or structures formation; Along with constantly building up of underground works, skyscraper or structures can be built at the ground region closely connecing underground structure, explosion in the process of construction of these buildings or structures, excavate and build up after buildings gravity load, Rock And Soil stress around can be made to change, thus the underground structure ambient stress built is changed, bring negative effect safely to underground structure; So the respective action relation of research surface structures and subsurface geologic structures is very with practical value.

At present, there is not yet the safety estimation system reported for superstructure and underground structure two-way interaction both at home and abroad, usual way is that superstructure and underground structure are influenced each other separated, and research is more that underground structure construction is assessed the security implication of surface structures, after different Software Numerical Simulations, result is artificially analyzed, the complex process of this analytical approach, computational science is poor, and accuracy is low, take time and effort, practical result is undesirable.Therefore, be necessary to set up a set of can fast, science, evaluate the survey and valuation systems approach of superstructure and underground structure interaction relationship exactly, for builder and supvr provide decision-making foundation.

Summary of the invention:

The object of the invention is to the shortcoming overcoming prior art existence, seek the assay method designing a kind of surface structures and underground structure interaction relationship, to realize infrastructure engineering to the impact of the contiguous existing building safety in ground and ground engineering construction to the mensuration of impact and the scientific evaluation that closely connect existing underground structure safety, require to carry out on the basis of safety evaluation in employing related specifications, binding isotherm is studied, on-the-spot test, laboratory examination and numerical simulation, test and appraisal content and appraisement system are programmed, utilize fractal theory, Coodination theory and intelligent search algorithm theory carry out measuring and evaluating with algorithm, realize the science of evaluation of measuring result and comprehensive.

To achieve these goals, the present invention is based on ArcGIS software platform and measure, comprise pattern visual evoked potentials, reduce, translation; Figure and attribute data are mutually inquired about and are jointly shown at same interface; Assay result is to scheme, to show and the display of the form such as document; Blasting vibration safety evaluation; Earth's surface distortion static (final form) and dynamically (deformation process) calculate; Surface structures gravity pressure circle calculates; Above ground structure Damage Evaluation; Underground structure Damage Evaluation; Grid of vector data and raster data vector quantization, conventional numerical simulation software Interface Expanding; It measures, and technique comprises database sharing, underground structure construction evaluates three steps to surface structures evaluation of effect and surface structures construction to underground structure function:

(1) database sharing: the database of structure comprises basic database and assay database two parts, basic database comprises graphic data base and attribute database, wherein, graphic data base is for storing topomap, planning chart, geologic map, drill drawing, surface structures distribution plan, underground structure distribution plan; Attribute database comprises ground buildings or structures information (as civilian, industrial, dyke etc.), underground structure information (as subterranean railway, underground storage, underground commerce etc.) and geological information (as stratum, landforms, tectonic structure, hydrogeology, environmental geology and seismogeology etc.); Assay database comprises evaluation criterion database and evaluation result database, wherein, evaluation criterion database comprises blasting vibration relevant criterion and evaluation index, earth's surface distortion relevant criterion and evaluation index, ground buildings or structures Damage Evaluation standard and evaluation index, underground structure safety assessment evaluation criterion and evaluation index; Evaluation result database is used for inventory analysis evaluation result, through expanding the spatial database forming figure and the seamless fusion of attribute database, be convenient to provide pilot process result for next step evaluation, or provide foundation for consulting from now on, be stored in database after arranging according to corresponding national regulation, simultaneously obtain correlative study achievement according to the means of engineering site experience, theoretical research, numerical experimentation and similarity model test, evaluation criterion in database and evaluation index are carried out abundant and perfect;

(2) underground structure construction is to surface structures evaluation of effect, comprises blasting vibration safety evaluation, earth's surface distortion is estimated, surface structures gravity pressure circle calculates and above ground structure Damage Evaluation; Blasting vibration safety evaluation on the known quick-fried heart to measuring point distance carry out maximum medicine calculation, known maximum medicine calculation blasting vibration safe distance, the comprehensive evaluation that affects by blasting vibration of blasting vibration intensity, the internal force of earth construction, dynamic respond value and above ground structure, and by setting up computation model, result of calculation is stored in rating database; Earth's surface distortion expectation is carried out earth's surface and is out of shape static (final form) and dynamically (deformation process) expectation, adopts the PECK formula of improvement and stochastic medium theory formula to carry out earth's surface distortion static (final form) and predicts; Adopt the deformation values in the fractal interpolation computing method calculating earth's surface deformation dynamics process of independent research, and corresponding figure and result of calculation are stored into evaluation result database; Above ground structure Damage Evaluation carries out Damage Evaluation to the buildings site inspection result of the version of xoncrete structure and masonry structure respectively, by setting up numerical model, utilize the buildings damage forecast computation model of independent research, what cause underground structure construction carries out comprehensive evaluation to above ground structure damage, and evaluation result is stored into evaluation according in storehouse;

(3) surface structures construction is evaluated underground structure function, comprises distortion and underground structure stress, change in displacement situation that measure and calculation surface structures excavation of foundation pit causes the Rock And Soil after stress relief, underground structure lining cutting stressing conditions and crack; Measure and calculation surface structures foundation ditch blasting vibration is on the impact of underground structure; The pressure coil that measure and calculation buildings gravity load causes, on the impact of underground structure, by setting up analytical model, being stored into measure and calculation result in rating database, completing the mensuration of surface structures and underground structure interactively.

Compared with prior art, its measuring principle is reliable in the present invention, and measure processing step simple, measure degree of accuracy high, determination techniques equipment is advanced, and good stability, the safety effect relation that can be widely used in various surface structures and underground structure measures and early warning.

Accompanying drawing illustrates:

Fig. 1 is main process steps flow chart structural principle schematic block diagram of the present invention.

Fig. 2 is the Analytical system composition structural principle schematic diagram that the present invention relates to.

Fig. 3 is the database sharing flowage structure schematic block diagram that the present invention relates to.

Fig. 4 is that the underground structure construction that the present invention relates to is to surface structures evaluation of effect flow process principle schematic.

Fig. 5 is that the surface structures that the present invention relates to is to underground structure function evaluation rubric structural principle schematic diagram.

Embodiment:

Also be described further by reference to the accompanying drawings below by embodiment.

Embodiment:

The present embodiment measures based on ArcGIS software platform, comprises pattern visual evoked potentials, reduces, translation; Figure and attribute data are mutually inquired about and are jointly shown at same interface; Assay result is to scheme, to show and the display of the form such as document; Blasting vibration safety evaluation; Earth's surface distortion static (final form) and dynamically (deformation process) calculate; Surface structures gravity pressure circle calculates; Above ground structure Damage Evaluation; Underground structure Damage Evaluation; Grid of vector data and raster data vector quantization, conventional numerical simulation software Interface Expanding; It measures, and technique comprises database sharing, underground structure construction evaluates three steps to surface structures evaluation of effect and surface structures construction to underground structure function:

(1) database sharing: the database of structure comprises basic database and assay database two parts, basic database comprises graphic data base and attribute database, wherein, graphic data base is for storing topomap, planning chart, geologic map, drill drawing, surface structures distribution plan, underground structure distribution plan; Attribute database comprises ground buildings or structures information (as civilian, industrial, dyke etc.), underground structure information (as subterranean railway, underground storage, underground commerce etc.) and geological information (as stratum, landforms, tectonic structure, hydrogeology, environmental geology and seismogeology etc.); Assay database comprises evaluation criterion database and evaluation result database, wherein, evaluation criterion database comprises blasting vibration relevant criterion and evaluation index, earth's surface distortion relevant criterion and evaluation index, ground buildings or structures Damage Evaluation standard and evaluation index, underground structure safety assessment evaluation criterion and evaluation index; Evaluation result database is used for inventory analysis evaluation result, through expanding the spatial database forming figure and the seamless fusion of attribute database, be convenient to provide pilot process result for next step evaluation, or provide foundation for consulting from now on, be stored in database after arranging according to corresponding national regulation, simultaneously obtain correlative study achievement according to the means of engineering site experience, theoretical research, numerical experimentation and similarity model test, evaluation criterion in database and evaluation index are carried out abundant and perfect;

(2) underground structure construction is to surface structures evaluation of effect, comprises blasting vibration safety evaluation, earth's surface distortion is estimated, surface structures gravity pressure circle calculates and above ground structure Damage Evaluation; Blasting vibration safety evaluation on the known quick-fried heart to measuring point distance carry out maximum medicine calculation, known maximum medicine calculation blasting vibration safe distance, the comprehensive evaluation that affects by blasting vibration of blasting vibration intensity, the internal force of earth construction, dynamic respond value and above ground structure, and by setting up computation model, result of calculation is stored in rating database; Earth's surface distortion expectation is carried out earth's surface and is out of shape static (final form) and dynamically (deformation process) expectation, adopts the PECK formula of improvement and stochastic medium theory formula to carry out earth's surface distortion static (final form) and predicts; Adopt the deformation values in the fractal interpolation computing method calculating earth's surface deformation dynamics process of independent research, and corresponding figure and result of calculation are stored into evaluation result database; Above ground structure Damage Evaluation carries out Damage Evaluation to the buildings site inspection result of the version of xoncrete structure and masonry structure respectively, by setting up numerical model, utilize the buildings damage forecast computation model of independent research, what cause underground structure construction carries out comprehensive evaluation to above ground structure damage, and evaluation result is stored into evaluation according in storehouse;

(3) surface structures construction is evaluated underground structure function, comprises distortion and underground structure stress, change in displacement situation that measure and calculation surface structures excavation of foundation pit causes the Rock And Soil after stress relief, underground structure lining cutting stressing conditions and crack; Measure and calculation surface structures foundation ditch blasting vibration is on the impact of underground structure; The pressure coil that measure and calculation buildings gravity load causes, on the impact of underground structure, by setting up analytical model, being stored into measure and calculation result in rating database, completing the mensuration of surface structures and underground structure interactively.

The PECK formula that the present embodiment relates to is:

$S\left(x\right)=\frac{V_l\·A_{\mathrm{\Ω}}}{\sqrt{2\mathrm{\π}}i}\exp (-\frac{x^2}{{2i}^2})$

Wherein, S is, x is the horizontal range from ground point corresponding to tunnel center line to institute's calculation level, V _lfor ground loss ratio, A _Ωthe area of position excavated section, i is subsider width; Stochastic medium theory formula is: become ω after setting excavation cross-section region Ω distortion, unit is excavated by this predefined collapse pattern to the surface subsidence that causes subsiding on area and carries out integration, just can obtain the displacement of overlying strata, tunnel in this situation

$S\left(x\right)=S_{\mathrm{\Ω}}\left(x\right)-S_{\mathrm{\ω}}\left(x\right)=\underset{\mathrm{\Ω}-\mathrm{\ω}}{\∫\∫}\frac{\tan \mathrm{\β}}{\mathrm{\η}}\exp [-\frac{\mathrm{\π}{\tan }^2\mathrm{\β}}{{\mathrm{\η}}^2}{(x-\mathrm{\ξ})}^2]\mathrm{d\ξd\η}$

In formula: β is the major effect angle of tunnel upper formation.

The ground settlement fractal interpolation computing method of the independent research that the present embodiment relates to are:

A. capacity dimension computes convergence fractal dimension of curve is used r is capacity yardstick;

B. regression equation ln [N (r)]=Dln (1/r)+b that box covers is calculated;

C. the related coefficient of ln [N (r)] and ln (1/r) discrete point is calculated;

D. utilize and fractally carry out difference $f\left(x\right)=\frac{c_n}{a_n}(x-e_n)+d_{n}f\left(\frac{X-e_n}{a_n}\right)+h_n,$ x∈[x _n-1，x _n]

And calculate relative error σ=| (g-f)/g|.

In formula $a_n=\frac{x_n-x_{n-1}}{x_N-x_0},$ $e_n=\frac{x_N{x}_{n-1}-x_0{x}_n}{x_N-x_0},$ $c_n=-\frac{(y_n-y_{n-1})(x_N-x_0)}{d_n(y_n-y_0)},$ $h_n=\frac{(x_N{y}_{n-1}-x_0{y}_n)}{x_N-x_0}-d_n\frac{(x_N{y}_0-x_0{y}_N)}{(x_N-x_0)},$ D _nfor vertical compression factor, 0≤d _n≤ 1, n=1,2 ..., N, σ are relative error, g measured data, f interpolated data.

The buildings damage forecast computation model of the independent research that the present embodiment relates to is:

$f({\mathrm{\σ}}_{\mathrm{\π}},{\mathrm{\τ}}_{\mathrm{\π}})=\frac{-B-\sqrt{B^2-\frac{4C(H\·A-{\mathrm{\σ}}_{\mathrm{\π}})}{H}}-\frac{2C\·{\mathrm{\τ}}_{\mathrm{\π}}}{H}}{-B-\sqrt{B^2-\frac{4C(H\·A-{\mathrm{\σ}}_{\mathrm{\π}})}{H}}}$

In formula $H=\sqrt{3}{f}_c,$ A=1/3b， $B=-\sqrt{1/6}\mathrm{\λ}/b,$ C=-a/2b， ${\mathrm{\τ}}_{\mathrm{\π}}=\sqrt{2J_2},$ ${\mathrm{\σ}}_{\mathrm{\π}}=I_1/\sqrt{3}$ Be respectively the shear stress in π plane and normal stress, J ₂for the second diviatoric stress tensor invariant, I ₁for first principal stress invariant.

The ArcGIS software platform that the present embodiment uses is selected from the software systems product that ESRI company of the U.S. offers for sale, this software is can the GIS platform series of products of seamless expansion, be based upon on industrial standard, have that function is large, easy to use, the advantage of friendly interface; The present embodiment carries out Two-level ensemble at the common component AO of ArcGIS9 software platform, is added in ArcGIS environment by each analysis module of VB, VC language compilation and realizes Function of Evaluation.

Claims (1)

1. surface structures and a underground structure interactively assay method, is characterized in that technique comprises database sharing to its mensuration, underground structure construction evaluates three steps to surface structures evaluation of effect and surface structures construction to underground structure function:

(1) database sharing: the database of structure comprises basic database and assay database two parts, basic database comprises graphic data base and attribute database, wherein, graphic data base is for storing topomap, planning chart, geologic map, drill drawing, surface structures distribution plan, underground structure distribution plan; Attribute database comprises above ground structure information, underground structure information and geological information; Assay database comprises evaluation criterion database and evaluation result database, wherein, evaluation criterion database comprises blasting vibration relevant criterion and evaluation index, earth's surface distortion relevant criterion and evaluation index, above ground structure Damage Evaluation standard and evaluation index, underground structure safety assessment evaluation criterion and evaluation index; Evaluation result database is used for inventory analysis evaluation result, through expanding the spatial database forming figure and the seamless fusion of attribute database, be convenient to provide pilot process result for next step evaluation, or provide foundation for consulting from now on, be stored in database after arranging according to corresponding national regulation, simultaneously obtain correlative study achievement according to the means of engineering site experience, theoretical research, numerical experimentation and similarity model test, evaluation criterion in database and evaluation index are carried out abundant and perfect;

(2) underground structure construction is to surface structures evaluation of effect, comprises blasting vibration safety evaluation, earth's surface distortion is estimated, surface structures gravity pressure circle calculates and above ground structure Damage Evaluation; Blasting vibration safety evaluation on the known quick-fried heart to measuring point distance carry out maximum medicine calculation, known maximum medicine calculation blasting vibration safe distance, the comprehensive evaluation that affects by blasting vibration of blasting vibration intensity, the internal force of earth construction, dynamic respond value and above ground structure, and by setting up computation model, result of calculation is stored in rating database; Earth's surface distortion expectation is carried out earth's surface distortion Static and dynamic and is estimated, adopts the PECK formula of improvement and stochastic medium theory formula to carry out earth's surface distortion static prediction; Adopt the deformation values in the fractal interpolation computing method calculating earth's surface deformation dynamics process of independent research, and corresponding figure and result of calculation are stored into evaluation result database; Above ground structure Damage Evaluation carries out Damage Evaluation to the buildings site inspection result of the version of xoncrete structure and masonry structure respectively, by setting up numerical model, utilize the buildings damage forecast computation model of independent research, what cause underground structure construction carries out comprehensive evaluation to above ground structure damage, and evaluation result is stored into evaluation according in storehouse; The PECK formula wherein improved is:

$S\left(x\right)=\frac{V_l\·A_{\mathrm{\Ω}}}{\sqrt{2\mathrm{\π}}i}\exp (-\frac{x^2}{{2i}^2})$

Wherein, x is the horizontal range from ground point corresponding to tunnel center line to institute's calculation level, V _lfor ground loss ratio, A _Ωthe area of position excavated section, i is subsider width; Stochastic medium theory formula is: become ω after setting excavation cross-section region Ω distortion, unit is excavated by this predefined collapse pattern to the surface subsidence that causes subsiding on area and carries out integration, just can obtain the displacement of overlying strata, tunnel in this situation

$S\left(x\right)=S_{\mathrm{\Ω}}\left(x\right)-S_{\mathrm{\ω}}\left(x\right)=\underset{\mathrm{\Ω}-\mathrm{\ω}}{\∫\∫}\frac{\tan \mathrm{\β}}{\mathrm{\η}}\exp [-\frac{\mathrm{\π}{\tan }^2\mathrm{\β}}{{\mathrm{\η}}^2}{(x-\mathrm{\ξ})}^2]\mathrm{d\ξd\η}$

In formula: β is the major effect angle of tunnel upper formation; The ground settlement fractal interpolation computing method of independent research are:

A. capacity dimension computes convergence fractal dimension of curve is used r is capacity yardstick;

B. regression equation ln [N (r)]=Dln (1/r)+b that box covers is calculated;

C. the related coefficient of ln [N (r)] and ln (1/r) discrete point is calculated;

D. utilize and fractally carry out difference $f\left(x\right)=\frac{c_n}{a_n}(x-e_n)+d_{n}f\left(\frac{X-e_n}{a_n}\right)+h_n,x\∈[x_{n-1},x_n]$

And calculate relative error σ=| (g-f)/g|, in formula $a_n=\frac{x_n-x_{n-1}}{x_N-x_0},e_n=\frac{x_N{x}_{n-1}-x_0{x}_n}{x_N-x_0},$ $c_n=-\frac{(y_n-y_{n-1})(x_N-x_0)}{d_n(y_N-y_0)},h_n=\frac{(x_N{y}_{n-1}-x_0{y}_n)}{x_N-x_0}-d_n\frac{(x_N{y}_0-x_0{y}_N)}{(x_N-x_0)},$ Dn is vertical compression factor, 0≤d _n≤ 1, n=1,2 ..., N, σ are relative error, g measured data, f interpolated data; The buildings damage forecast computation model of independent research is:

$f({\mathrm{\σ}}_{\mathrm{\π}},{\mathrm{\τ}}_{\mathrm{\π}})=\frac{-B-\sqrt{B^2-\frac{4C(H\·A-{\mathrm{\σ}}_{\mathrm{\π}})}{H}}-\frac{2C\·{\mathrm{\τ}}_{\mathrm{\π}}}{H}}{-B-\sqrt{B^2-\frac{4C(H\·A-{\mathrm{\σ}}_{\mathrm{\π}})}{H}}}$

In formula $H=\sqrt{3}{f}_c,$ A＝1/3b， $B=-\sqrt{1/6}\mathrm{\λ}/b,$ C＝-a/2b， ${\mathrm{\τ}}_{\mathrm{\π}}=\sqrt{2J_2},$ ${\mathrm{\σ}}_{\mathrm{\π}}=I_1/\sqrt{3}$ Be respectively the shear stress in π plane and normal stress, J ₂for the second diviatoric stress tensor invariant, I ₁for first principal stress invariant;

(3) surface structures construction is evaluated underground structure function, comprises distortion and underground structure stress, change in displacement situation that measure and calculation surface structures excavation of foundation pit causes the Rock And Soil after stress relief, underground structure lining cutting stressing conditions and crack; Measure and calculation surface structures foundation ditch blasting vibration is on the impact of underground structure; The pressure coil that measure and calculation buildings gravity load causes, on the impact of underground structure, by setting up analytical model, being stored into measure and calculation result in rating database, completing the mensuration of surface structures and underground structure interactively.