CN114510759A - Step-by-step excavation method for foundation pit group - Google Patents
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- CN114510759A CN114510759A CN202111607216.0A CN202111607216A CN114510759A CN 114510759 A CN114510759 A CN 114510759A CN 202111607216 A CN202111607216 A CN 202111607216A CN 114510759 A CN114510759 A CN 114510759A
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 238000006073 displacement reaction Methods 0.000 claims abstract description 10
- 238000012216 screening Methods 0.000 claims abstract description 4
- 230000001413 cellular effect Effects 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 12
- 238000012545 processing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- NFGXHKASABOEEW-UHFFFAOYSA-N 1-methylethyl 11-methoxy-3,7,11-trimethyl-2,4-dodecadienoate Chemical compound COC(C)(C)CCCC(C)CC=CC(C)=CC(=O)OC(C)C NFGXHKASABOEEW-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
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Abstract
The invention discloses a foundation pit group step-by-step excavation method, which comprises the following specific steps: s1, establishing a FLAC3D foundation pit group three-dimensional model and setting monitoring points; s2, determining the excavation range of the block region and outputting the node and unit information as a txt document; s3, importing node information unit information by matlab; s4, outputting unit information sequence combination under each excavation step sequence by matlab programming, arranging and combining sentences; s5, calling FLAC3D by matlab through an INI initialization document newly built in the FLAC3D main directory; s6, excavating and extracting displacement deformation data of the monitoring points; and S7, screening out the excavation unit sequence combination with the minimum deformation through an if function. The method has the advantages of simple principle, strong operability and obvious advantages, and can effectively improve the efficiency and the construction safety.
Description
Technical Field
The invention relates to the field of buildings, in particular to a foundation pit group step-by-step excavation method.
Background
In recent years, with the continuous acceleration of urban underground space development and the influence of urgent needs of engineering construction, the comprehensive simultaneous construction of different foundation pit engineering projects in the same area appears, so that large deep foundation pits in different forms are associated with each other, and complex foundation pit group engineering tends to appear in large quantities.
The complex foundation pit group refers to a complex deep and large foundation pit composed of two or more foundation pits, the combination form of the complex deep and large foundation pits is generally expressed as that the foundation pits are adjacent and overlapped in space, the shapes of the single foundation pits forming the foundation pit group are different, and the excavation depths are different. Compared with a single foundation pit, the foundation pit group construction has the problems that the soil pressure is unloaded for multiple times due to different block constructions, the soil pressure and deformation of each block are mutually superposed (namely a coupling effect), the construction period is long, the space-time effect is obvious and the like. The foundation pit group construction coupling effect usually generates interaction on the construction of peripheral construction objects, the mutual influence of all foundation pits in the foundation pit group construction process is controlled, the safety and stability of the foundation pit group construction are ensured, the key is to ensure reasonable excavation procedures, and the deformation of all the foundation pits in the excavation process is ensured to be within a controllable and safe range.
At present, the excavation step sequence scheme is mainly selected by modeling calculation through numerical simulation software and comparing output deformation, but the process is complicated and the efficiency is too low, and the simultaneous modeling calculation of each scheme can not be realized under the condition that multiple schemes coexist; and matlab has strong compiling and interface capabilities and can realize the calling of other software. The two methods are combined to realize the automation of the step-by-step excavation scheme selection of the foundation pit group, so that the practical problem is solved, and the efficiency is improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a foundation pit group step-by-step excavation method which is simple in principle, strong in operability and obvious in advantages and can effectively improve the efficiency and the construction safety.
The invention discloses a foundation pit group step-by-step excavation method, which is realized by the following technical scheme and comprises the following specific steps:
s1, establishing a FLAC3D foundation pit group three-dimensional model and setting monitoring points;
s2, determining the excavation range of the block region and outputting the node and unit information as a txt document;
s3, importing node information unit information by matlab;
s4, outputting unit information sequence combination under each excavation step sequence by matlab programming, arranging and combining sentences;
s5, calling FLAC3D by matlab through an INI initialization document newly built in the FLAC3D main directory;
s6, excavating and extracting displacement deformation data of the monitoring points;
and S7, screening out the excavation unit sequence combination with the minimum deformation through an if function.
As an optimal technical scheme, the information of the foundation pit group module is compiled through FLAC3D software in the early stage, a grid is generated, the shape of the grid is adjusted, boundary conditions and initial conditions are set, monitoring point positions are set, a solid three-dimensional model is drawn, different units planned to be excavated are cut, merged and the like, and different stratum attributes are given.
As a preferred technical scheme, information of unit information nodes of different excavation areas is output as txt text documents and stored in a folder; and importing the txt document storing the cell information node information into matlab, and converting the string array into a cell array to be stored in a cellular array format.
As a preferred technical scheme, different excavation unit information arrangement combinations are realized through programming based on matlab; reading the information of the excavation units line by line, and respectively outputting txt documents into a 'new' folder according to the sequence of arrangement and combination as a calling sequence of the subsequent step excavation; compiling subsequent excavation statements in the FLAC3D, and using a call command to realize the cyclic calling of the information of each excavation unit so as to realize the simultaneous excavation; the FLAC3D program was written and stored in the main program directory.
As a preferred technical scheme, a txt file is newly created in a FLAC3D main program directory, and a new call main program file path, duncanEB, test, 0-duncanEB-oneZontetest.dat is input, and the suffix of the text file is changed into INI as an initialization document.
As an optimized technical scheme, a txt document input' start main program file path is established
Kabat, named flac3dload, as a batch process startup script file;
as a preferred technical solution, the path of the main program of FLAC3D is set as the current path of matlab, and the following code is executed:
clear
clc
(s, e) dos ('main program file path \ flac3 dload.bat');
as an optimal technical scheme, calling of FLAC3D excavation statements is completed, and each excavation unit is sequenced and combined to be excavated;
and outputting deformation displacement data of each foundation pit monitoring point for integration, compiling a circulation statement through matlab to select the minimum total deformation displacement, wherein the corresponding excavation step sequence is the optimal excavation step sequence.
The invention has the beneficial effects that: the invention combines the powerful compiling function of matlab with the building and post-processing capability of the FLAC3d model, realizes the calling of the matlab to the FLAC3D, realizes the automation of batch processing of foundation pit group excavation schemes, enables workers to effectively compare the advantages and the disadvantages of each scheme when dealing with the problem of foundation pit group excavation step sequence, avoids the frequent compiling and calling of commands by using single software under the condition that a plurality of schemes coexist, greatly improves the working efficiency, evaluates the safety of the excavation scheme, and can effectively avoid the occurrence of accidents.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a flowchart of the matlab call FLAC3D procedure of the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The use of terms such as "upper," "above," "lower," "below," and the like in describing relative spatial positions herein is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented and the spatially relative descriptors used herein interpreted accordingly.
In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1-2, the method for excavating foundation pits in steps of the invention comprises the following steps:
s1, establishing a FLAC3D foundation pit group three-dimensional model and setting monitoring points;
s2, determining the excavation range of the block region and outputting the node and unit information as a txt document;
s3, importing node information unit information by matlab;
s4, outputting unit information sequence combination under each excavation step sequence by matlab programming, arranging and combining sentences;
s5, calling FLAC3D by matlab through an INI initialization document newly built in the FLAC3D main directory;
s6, excavating and extracting displacement deformation data of the monitoring points;
and S7, screening out the excavation unit sequence combination with the minimum deformation through an if function.
In this embodiment, in an early stage, the FLAC3D software is used to compile foundation pit group module information, generate a grid, adjust the grid shape, set boundary conditions and initial conditions, set monitoring points, complete drawing of a solid three-dimensional model, perform processing such as cutting and merging on different units planned to be excavated, and give different stratum attributes.
In the embodiment, information of unit information nodes of different excavation areas is output as txt text documents and stored in a folder; and importing the txt document storing the cell information node information into matlab, and converting the string array into a cell array to be stored in a cellular array format.
In the embodiment, different excavation unit information arrangement combinations are realized through programming based on matlab; reading the information of the excavation units line by line, and respectively outputting txt documents into a 'new' folder according to the sequence of arrangement and combination as a calling sequence of the subsequent step excavation; compiling subsequent excavation statements in the FLAC3D, and using a call command to realize the cyclic calling of the information of each excavation unit so as to realize the simultaneous excavation; the FLAC3D program was written and stored in the main program directory.
In this embodiment, a txt file is created in the FLAC3D main program directory, and "new call main program file path \ duncanEB \ test \ 0-duncanEB-onezonetest.dat" is input, and this text file suffix is changed to INI as an initialization document.
In this embodiment, a txt document input "start main program file path \ f3300.exe" is established and a suffix is changed to bat, which is named flac3dload.bat and is used as a batch processing start script file;
in this embodiment, the path of the main program of FLAC3D is set as the current path of matlab, and the following codes are executed:
clear
clc
(s, e) dos ('main program file path \ flac3 dload.bat');
in the embodiment, calling of FLAC3D excavation statements is completed, and each excavation unit is sequenced and combined to be excavated;
in the embodiment, deformation displacement data of each foundation pit monitoring point are output and integrated, the minimum total deformation displacement is selected by compiling a circulation statement through matlab, and the corresponding excavation step sequence is the optimal excavation step sequence.
The beneficial effects are as follows:
the invention combines the powerful compiling function of matlab with the building and post-processing capability of the FLAC3d model, realizes the calling of the matlab to the FLAC3D, realizes the automation of batch processing of foundation pit group excavation schemes, ensures that workers can effectively compare the advantages and the disadvantages of each scheme when dealing with the problem of foundation pit group excavation step sequence, avoids the frequent compiling and calling of commands by using single software under the condition that a plurality of schemes coexist, greatly improves the working efficiency, evaluates the safety of the excavation scheme, and can effectively avoid the occurrence of accidents
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (9)
1. A foundation pit group step-by-step excavation method is characterized by comprising the following specific steps:
s1, establishing a FLAC3D foundation pit group three-dimensional model and setting monitoring points;
s2, determining the excavation range of the block region and outputting the node and unit information as a txt document;
s3, importing node information unit information by matlab;
s4, outputting unit information sequence combination under each excavation step sequence by matlab programming, arranging and combining sentences;
s5, calling FLAC3D by matlab through an INI initialization document newly built in the FLAC3D main directory;
s6, excavating and extracting displacement deformation data of the monitoring points;
and S7, screening out the excavation unit sequence combination with the minimum deformation through an if function.
2. The method for excavating the foundation pit group according to claim 1, wherein: and compiling the information of the foundation pit group module by using FLAC3D software in the earlier stage to generate a grid, adjusting the shape of the grid, setting boundary conditions and initial conditions, setting monitoring point positions, finishing drawing a solid three-dimensional model, cutting and combining different units planned to be excavated, and endowing different stratum attributes.
3. The method for excavating the foundation pit group according to claim 1, wherein: outputting unit information node information of different excavation areas into txt text documents and storing the txt text documents into a folder; and importing the txt document storing the cell information node information into matlab, and converting the string array into a cell array to be stored in a cellular array format.
4. The method for excavating the foundation pit group according to claim 1, wherein: different excavation unit information arrangement combinations are realized through programming based on matlab; reading the information of the excavation units line by line, and respectively outputting txt documents into a 'new' folder according to the sequence of arrangement and combination as a calling sequence of the subsequent step excavation; compiling subsequent excavation statements in the FLAC3D, and using a call command to realize the cyclic calling of the information of each excavation unit so as to realize the simultaneous excavation; the FLAC3D program was written and stored in the main program directory.
5. The method for excavating the foundation pit group according to claim 1, wherein: a txt file is newly created in a FLAC3D main program directory, and the new call main program file path \ duncanEB \ test \ 0-duncanEB-oneZontest.dat is input, and the text file suffix is changed into INI as an initialization document.
6. The method for excavating the foundation pit group according to claim 1, wherein: the txt document input "start main program file path \ f3300. exe" is established and the suffix is changed to bat, named flac3dload.
7. The method for excavating the foundation pit group according to claim 1, wherein: the path of the main program of FLAC3D is set to the current path of matlab, and the following code is executed:
clear
clc
[ s, e ] ═ dos (' main program file path \ flac3dload.
8. The method for excavating the foundation pit group according to claim 1, wherein: and (4) calling the FLAC3D excavation statement, and respectively excavating the ordered combination of the excavation units.
9. The method for excavating the foundation pit group according to claim 1, wherein: outputting deformation displacement data of each foundation pit monitoring point for integration, compiling a circulation statement through matlab to select the minimum total deformation displacement, and taking the corresponding excavation step sequence as the optimal excavation step sequence.
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