CN115110962A - Method and system for predicting shield tunneling parameters of composite strata with different composite ratios - Google Patents
Method and system for predicting shield tunneling parameters of composite strata with different composite ratios Download PDFInfo
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- 230000005641 tunneling Effects 0.000 title claims abstract description 237
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- 238000012544 monitoring process Methods 0.000 claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 28
- 238000009412 basement excavation Methods 0.000 claims abstract description 26
- 238000012216 screening Methods 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 claims abstract description 8
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- 238000005755 formation reaction Methods 0.000 description 10
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/093—Control of the driving shield, e.g. of the hydraulic advancing cylinders
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/23—Updating
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The invention relates to the technical field of shield construction, and provides a method and a system for predicting shield tunneling parameters of different compound ratios of compound strata, wherein the method comprises the following steps: analyzing a geological profile of a section to be subjected to shield tunneling, and collecting and processing shield tunneling data of similar composite strata to obtain a shield tunneling parameter database of the composite strata; monitoring shield tunneling parameters of a shield tunneling section, screening the shield tunneling parameters by adopting a ground surface monitoring method to obtain normal shield tunneling parameters, and supplementing a database; continuously providing new data for the database through continuous excavation of the shield, and supplementing and updating the database; and (3) obtaining a fitting relation between T, F, T, F and the composite ratio xi by using the shield tunneling parameters in the database, and providing guidance for setting the shield tunneling parameters of the composite stratum to be excavated through the fitting relation. The shield tunneling data can be continuously updated, so that the fitting formula is continuously updated and optimized, and the result is more accurate.
Description
Technical Field
The invention relates to the technical field of shield construction, in particular to a method and a system for predicting shield tunneling parameters of different compound ratios of compound strata.
Background
The shield tunneling parameters at the present stage are mainly calculated through an empirical formula.
However, setting of shield tunneling parameters of a composite stratum is difficult, and an accurate method is not available at present.
Especially for composite strata with different composite ratios, the setting of the shield tunneling parameters can not adapt to the continuously changing composite ratio, and the shield tunneling accuracy is low.
In addition, the thickness of the shield ring for shield tunneling is 1.5m and 1.2m, and the shield tunneling parameters of the two segments cannot be uniformly researched.
Disclosure of Invention
In view of the above, the invention aims to provide a composite stratum shield tunneling parameter prediction method based on different composite ratios, which introduces an average rotation force arm of cutter torque and per-rotation cutting depth h
The shield thrust and the torque are processed in a unitized manner, so that shield tunneling parameters are more convenient to establish a relation with stratum relativity.
The method comprises the steps of analyzing and disassembling a geological profile map in the early stage, selecting a composite stratum of a shield tunneling section, calculating a composite ratio xi of the composite stratum, obtaining a certain number of shield tunneling parameters through trial tunneling, fitting unit thrust and unit torque under the composite ratio, finally obtaining a fitting equation of the thrust and the torque, and setting shield tunneling parameters by referring to the composite ratio condition in subsequent tunneling. And monitoring the deformation condition of the ground surface in the tunneling process, and feeding back whether the setting of the shield tunneling parameters is correct or not through the ground surface settlement condition until the shield tunneling is finished.
The invention provides a method for predicting shield tunneling parameters of composite strata with different composite ratios, which comprises the following steps of:
s1, selecting a composite stratum interval to be subjected to shield tunneling construction, and performing stratum section analysis on a longitudinal geological section map of the composite stratum interval;
s2, collecting shield excavation and tunneling data of the composite stratum similar to the composite stratum interval, and carrying out secondary processing on the shield excavation and tunneling data to obtain a composite stratum shield tunneling parameter database;
specifically, the shield excavation tunneling data is subjected to secondary processing and then used for subsequent analysis;
the method for performing secondary processing on the shield excavation tunneling data comprises the following steps:
selecting the average rotating force arm of thrust T, torque T, cutting depth per revolution h and cutter head torque in shield tunneling parameters
Secondary processing is carried out on the shield tunneling parameters to obtain unit thrust
And unit torque
Unit thrust force
The shield thrust (kN/mm) and the unit torque required by the earth pressure shield tunneling machine for tunneling the unit length
The tangential force (kN m/mm) of the cutter head required by the unit cutting depth of tunneling is expressed;
s3, dividing a longitudinal geological profile after the formation profile analysis is completed into composite formation parts, and solving a composite ratio xi of the composite formation parts;
s4, performing shield tunneling, monitoring shield tunneling parameters including thrust and torque, screening the shield tunneling parameters by adopting a ground surface monitoring method while monitoring the shield tunneling parameters to obtain normal shield tunneling parameters, and supplementing a composite stratum shield tunneling parameter database;
s5, counting and processing the normal shield tunneling parameters, and calculating to obtain the unit thrust
And unit torque
Establishment of unit thrust by mathematical statistical principle
Specific torque
And a fitting formula of the composite ratio xi, and obtaining a fitting formula of the thrust T, the torque F and the composite ratio xi according to the comprehensive condition of the shield tunneling parameters;
s6, guiding the setting of shield tunneling parameters through a fitting formula of the thrust T, the torque F and the composite ratio xi, substituting the composite ratio xi of the composite stratum obtained by dividing the composite stratum in the early stage into the fitting formula of the thrust T, the torque F and the composite ratio xi to calculate a setting suggestion value of the thrust T and the torque F, and guiding the setting of subsequent shield tunneling parameters;
and S7, repeating the steps S4-S6, and determining the optimal shield tunneling parameters under different compound ratios until the shield tunneling is finished.
Further, the method for solving the composite ratio ξ of the composite formation portion in the step S3 comprises the following steps:
defining the composite ratio xi in the composite stratum as the area ratio of the upper layer soil layer to the excavated surface, wherein the excavated surface comprises two soil layers; taking clay as an example in the upper soil layer:
in formula (1): theta is the central angle corresponding to the clay layer,
h 1 is the clay layer thickness and R is the excavation radius.
Further, the screening of the shield tunneling parameters by the method of surface monitoring in the step S4 includes:
monitoring the deformation of the earth surface to obtain a data value of the deformation of the earth surface; and analyzing the monitoring result of the surface deformation, comparing the surface deformation with the deformation control standard value, and judging whether the surface deformation exceeds the standard or not.
Further, the processing method after judging whether the surface deformation exceeds the standard comprises the following steps:
if the deformation of the ground surface exceeds the standard, further monitoring and analyzing the thrust and the torque of the shield tunneling, analyzing the reason of the exceeding of the deformation of the ground surface, and determining the obtained shield tunneling data as abnormal shield tunneling data without entering a database;
if the deformation of the earth surface does not exceed the standard, the normal shield tunneling data is determined, and the data is stored in a database.
Further, the unit thrust is established in the step S5
Specific torque
The method of the fitting formula of the sum composite ratio xi is to use unit thrust
And unit torque
With a combined ratio xi in terms of power index y ═ ax b Fitting the functional relationship of (a).
Further, the step S7 is followed by:
arranging all normal shield tunneling parameters, and adding the normal shield tunneling parameters to a composite stratum shield tunneling parameter database to form a new composite stratum shield tunneling parameter database;
and continuously providing new data for the composite stratum shield tunneling parameter database through continuous shield excavation, so that the composite stratum shield tunneling parameter database is supplemented and updated.
The invention also provides a device for predicting the shield tunneling parameters of the composite strata with different compound ratios, which executes the method for predicting the shield tunneling parameters of the composite strata with different compound ratios, and comprises the following steps:
a stratum section analysis module: the method comprises the steps of selecting a composite stratum interval to be subjected to shield tunneling construction, and carrying out stratum section analysis on a longitudinal geological section map of the composite stratum interval;
the module for collecting shield excavation tunneling data: the system comprises a data base, a data acquisition module, a data processing module and a data processing module, wherein the data base is used for collecting shield excavation tunneling data of a composite stratum similar to the composite stratum interval and carrying out secondary processing on the shield excavation tunneling data to obtain a composite stratum shield tunneling parameter database;
and a complex ratio solving module: the system is used for dividing a longitudinal geological profile map which completes the stratigraphic profile analysis into a composite stratigraphic part and solving a composite ratio xi of the composite stratigraphic part;
normal shield tunnelling parameter screening module: the system is used for monitoring shield tunneling parameters including thrust and torque during shield tunneling, screening the shield tunneling parameters by adopting a ground surface monitoring method while monitoring the shield tunneling parameters to obtain normal shield tunneling parameters, and supplementing a composite stratum shield tunneling parameter database;
establishing a fitting formula module: is used for counting and processing the normal shield tunneling parameters and calculating to obtain unit thrust
And unit torque
Establishment of unit thrust by mathematical statistical principle
Specific torque
And a fitting formula of the composite ratio xi, and obtaining a fitting formula of the thrust T, the torque F and the composite ratio xi according to the comprehensive condition of the shield tunneling parameters;
a shield tunneling guide parameter setting module: guiding the setting of shield tunneling parameters through a fitting formula of the thrust T, the torque F and the composite ratio xi, substituting the composite ratio xi of the composite stratum obtained by dividing the composite stratum in the early stage into the fitting formula of the thrust T, the torque F and the composite ratio xi to calculate a setting suggested value of the thrust T and the torque F, and guiding the setting of subsequent shield tunneling parameters;
an optimal shield tunneling parameter calculation module: repeating the steps S4-S6, and determining the optimal shield tunneling parameters under different compound ratios until the shield tunneling is finished;
updating a composite stratum shield tunneling parameter database module: and the method is used for arranging all normal shield tunneling parameters and adding the normal shield tunneling parameters to the composite stratum shield tunneling parameter database to form a new composite stratum shield tunneling parameter database.
The invention also provides a computer readable storage medium on which a computer program is stored, which program, when executed by a processor, implements the steps of the method for predicting shield tunneling parameters of different composite-ratio composite strata as described above.
The invention also provides computer equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize the steps of the shield tunneling parameter prediction method of the different compound ratio compound strata.
Compared with the prior art, the invention has the beneficial effects that:
the shield tunneling data of the invention can be continuously updated, so that the fitting formula of the shield tunneling parameters is continuously updated and optimized, and the parameter prediction result is more accurate.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
In the drawings:
FIG. 1 is a flow chart of a method for predicting shield tunneling parameters of a composite formation with different compound ratios according to the present invention;
FIG. 2 is a schematic diagram of a computer device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating an area ratio of clay to an excavation surface according to an embodiment of the present invention;
FIGS. 4 and 5 are schematic graphs of thrust force fitting equations according to embodiments of the present invention;
FIGS. 6 and 7 are graphs illustrating torque fitting equations according to embodiments of the present invention;
fig. 8 is a schematic flow chart of a shield tunneling parameter prediction process according to an embodiment of the present invention;
FIG. 9 is a geological profile of a sand-bonded composite formation according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and products consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
The embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
The embodiment of the invention mainly aims at a composite stratum consisting of two stratums, wherein the upper layer is clay, and the lower layer is sandy soil, so that the sand-bonded composite stratum is constructed, and the composite stratum shield tunneling parameter prediction method based on different composite ratios is used for setting shield tunneling parameters.
The embodiment of the invention provides a method for predicting shield tunneling parameters of composite strata with different composite ratios, which is shown in figure 1 and comprises the following steps:
s1, selecting a composite stratum interval to be subjected to shield tunneling construction, and performing stratum profile analysis on a longitudinal geological profile of the composite stratum interval; referring to fig. 9, a geological profile to be constructed in the embodiment is shown;
s2, collecting shield excavation tunneling data of the composite stratum similar to the composite stratum interval, and performing secondary processing on the shield excavation tunneling data to obtain a composite stratum shield tunneling parameter database;
in the embodiment, a large number of shield tunneling parameters of the similar sand-bonded composite stratum are collected and processed for analyzing shield tunneling;
specifically, the shield excavation tunneling data is subjected to secondary processing and then used for subsequent analysis;
the method for performing secondary processing on the shield excavation tunneling data comprises the following steps:
selecting the average rotating force arm of thrust T, torque T, cutting depth per revolution h and cutter head torque in shield tunneling parameters
Secondary processing is carried out on the shield tunneling parameters to obtain unit thrust
And unit torque
Unit thrust force
The shield thrust (kN/mm) and the unit torque required by the earth pressure shield tunneling machine for tunneling the unit length
The tangential force (kN m/mm) of the cutter head required by the unit cutting depth of tunneling is expressed;
s3, dividing a longitudinal geological profile after the formation profile analysis is completed into composite formation parts, and solving a composite ratio xi of the composite formation parts;
the method for solving the composite ratio xi of the composite stratum part comprises the following steps:
the composite ratio xi in the composite stratum is defined as the area ratio of the excavated surface containing two soil layers, as shown in fig. 3, wherein the area of the upper soil layer (the upper soil layer is clay in this embodiment) accounts for the area ratio of the excavated surface:
in formula (1): theta is the central angle corresponding to the clay layer,
h 1 the thickness of the clay layer is shown, and R is the excavation radius;
in this example, the composite ratio of 472 to 532 loops was calculated to be 70%;
s4, performing shield tunneling, monitoring shield tunneling parameters including thrust and torque, screening the shield tunneling parameters by adopting a ground surface monitoring method while monitoring the shield tunneling parameters to obtain normal shield tunneling parameters, and supplementing a composite stratum shield tunneling parameter database;
in this embodiment, referring to fig. 9, loops 472 to 532 are selected for monitoring and predicting shield tunneling parameters;
in particular, the surface deformation comprises surface subsidence;
the screening of the shield tunneling parameters by adopting the earth surface monitoring method comprises the following steps:
monitoring the deformation of the earth surface to obtain a data value of the deformation of the earth surface; analyzing the monitoring result of the surface deformation, comparing the surface deformation with a deformation control standard value, and judging whether the surface deformation exceeds the standard or not;
if the deformation of the ground surface exceeds the standard, further monitoring and analyzing the thrust and the torque of the shield tunneling, analyzing the reason of the exceeding of the deformation of the ground surface, and determining the obtained shield tunneling data as abnormal shield tunneling data without entering a database;
if the deformation of the earth surface does not exceed the standard, the normal shield tunneling data is determined, and the data is stored in a database;
s5, counting and processing the normal shield tunneling parameters, and calculating to obtain the unit thrust
And unit torque
Establishment of unit thrust by mathematical statistical principle
Specific torque
Simulation of sum composite ratio xiCombining formulas, and obtaining a fitting formula of thrust T, torque F and composite ratio xi according to the comprehensive condition of the shield tunneling parameters;
said build-up of unit thrust
Specific torque
The method of the fitting formula of the sum composite ratio xi is to use the unit thrust
And unit torque
With a combined ratio xi in terms of power index y ═ ax b Fitting the functional relationship;
in this embodiment, referring to fig. 4 and 5, coefficients a in the fitting formula of the thrust are 16768 and 1559.3, respectively, and coefficients b are-1.023 and-0.974, respectively; r 2 Correlation coefficient of fitting formula;
fitting formula corresponding to fig. 4
R 2 ＝0.8326
F＝16768ξ -1.023 h (2)
Fitting formula corresponding to fig. 5
R 2 ＝0.9244
F＝1559.3ξ -0.974 h (3)
Referring to fig. 6 and 7, the coefficients a of the fitting equation of the torque are 103.88 and 30.399, respectively, and b is-0.529 and-0.486, respectively;
fitting formula corresponding to fig. 6
R 2 ＝0.6292
Fitting formula corresponding to fig. 7
R 2 ＝0.7673
S6, guiding the setting of shield tunneling parameters through a fitting formula of the thrust T, the torque F and the composite ratio xi, substituting the composite ratio xi of the composite stratum obtained by dividing the composite stratum in the early stage into the fitting formula of the thrust T, the torque F and the composite ratio xi to calculate a setting suggestion value of the thrust T and the torque F, and guiding the setting of subsequent shield tunneling parameters;
and S7, repeating the steps S4-S6, and determining the optimal shield tunneling parameters under different compound ratios until the shield tunneling is finished.
Arranging all normal shield tunneling parameters, and adding the normal shield tunneling parameters to a composite stratum shield tunneling parameter database to form a new composite stratum shield tunneling parameter database;
and continuously providing new data for the composite stratum shield tunneling parameter database through continuous shield excavation, so that the composite stratum shield tunneling parameter database is supplemented and updated.
Fig. 8 is a schematic flow chart of the shield tunneling parameter prediction process in this embodiment.
The embodiment of the invention also provides a device for predicting shield tunneling parameters of different compound ratios of compound strata, which executes the method for predicting the shield tunneling parameters of the different compound ratios of compound strata, and comprises the following steps:
a stratum section analysis module: the method comprises the steps of selecting a composite stratum interval to be subjected to shield tunneling construction, and carrying out stratum section analysis on a longitudinal geological section map of the composite stratum interval;
the module for collecting shield excavation tunneling data: the system comprises a data base, a data acquisition module, a data processing module and a data processing module, wherein the data base is used for collecting shield excavation tunneling data of a composite stratum similar to the composite stratum interval and carrying out secondary processing on the shield excavation tunneling data to obtain a composite stratum shield tunneling parameter database;
and a complex ratio solving module: the system is used for dividing a longitudinal geological profile map which completes the stratigraphic profile analysis into a composite stratigraphic part and solving a composite ratio xi of the composite stratigraphic part;
a normal shield tunneling parameter screening module: the system is used for monitoring shield tunneling parameters including thrust and torque during shield tunneling, screening the shield tunneling parameters by adopting a ground surface monitoring method while monitoring the shield tunneling parameters to obtain normal shield tunneling parameters, and supplementing a composite stratum shield tunneling parameter database;
establishing a fitting formula module: the system is used for counting and processing the normal shield tunneling parameters and calculating to obtain unit thrust
And unit torque
Establishment of unit thrust by mathematical statistical principle
Specific torque
And a fitting formula of the composite ratio xi, and obtaining a fitting formula of the thrust T, the torque F and the composite ratio xi according to the comprehensive condition of the shield tunneling parameters;
a shield tunneling guide parameter setting module: guiding the setting of shield tunneling parameters through a fitting formula of the thrust T, the torque F and the composite ratio xi, substituting the composite ratio xi of the composite stratum obtained by dividing the composite stratum in the early stage into the fitting formula of the thrust T, the torque F and the composite ratio xi to calculate a setting suggested value of the thrust T and the torque F, and guiding the setting of subsequent shield tunneling parameters;
an optimal shield tunneling parameter calculation module: repeating the steps S4-S6, and determining the optimal shield tunneling parameters under different compound ratios until the shield tunneling is finished;
updating a composite stratum shield tunneling parameter database module: and the method is used for arranging all normal shield tunneling parameters and adding the normal shield tunneling parameters to the composite stratum shield tunneling parameter database to form a new composite stratum shield tunneling parameter database.
Fig. 2 is a schematic structural diagram of a computer device provided in an embodiment of the present invention; referring to fig. 2 of the drawings, the computer apparatus comprises: an input device 23, an output device 24, a memory 22 and a processor 21; the memory 22 for storing one or more programs; when the one or more programs are executed by the one or more processors 21, the one or more processors 21 are enabled to implement the method for predicting shield tunneling parameters of different compound-ratio compound formations as provided in the above embodiments; wherein the input device 23, the output device 24, the memory 22 and the processor 21 may be connected by a bus or other means, as exemplified by the bus connection in fig. 2.
The memory 22 is a readable and writable storage medium of a computing device, and can be used for storing a software program, a computer executable program, and program instructions corresponding to the shield tunneling parameter prediction method for the composite strata with different compound ratios according to the embodiment of the present invention; the memory 22 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the device, and the like; further, the memory 22 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device; in some examples, the memory 22 may further include memory located remotely from the processor 21, which may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 23 may be used to receive input numeric or character information and to generate key signal inputs relating to user settings and function control of the apparatus; the output device 24 may include a display device such as a display screen.
The processor 21 executes various functional applications and data processing of the device by running software programs, instructions and modules stored in the memory 22, that is, the method for predicting the shield tunneling parameters of the composite strata with different compound ratios is realized.
The computer equipment can be used for executing the method for predicting the shield tunneling parameters of the composite strata with different composite ratios, and has corresponding functions and beneficial effects.
Embodiments of the present invention further provide a storage medium containing computer executable instructions, which when executed by a computer processor, is configured to perform the method for predicting shield tunneling parameters of different composite-ratio composite strata, as provided in the above embodiments, where the storage medium is any of various types of memory devices or storage devices, and the storage medium includes: mounting media such as CD-ROM, floppy disk, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Lanbas (Rambus) RAM, etc.; non-volatile memory such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc.; the storage medium may also include other types of memory or combinations thereof; in addition, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system connected to the first computer system through a network (such as the internet); the second computer system may provide program instructions to the first computer for execution. A storage medium includes two or more storage media that may reside in different locations, such as in different computer systems connected by a network. The storage medium may store program instructions (e.g., embodied as a computer program) that are executable by one or more processors.
Of course, the storage medium containing the computer executable instructions provided in the embodiments of the present invention is not limited to the method for predicting shield tunneling parameters of different composite-ratio composite strata as described in the above embodiments, and may also perform related operations in the method for predicting shield tunneling parameters of different composite-ratio composite strata as provided in any embodiment of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method for predicting shield tunneling parameters of composite strata with different compound ratios is characterized by comprising the following steps:
s1, selecting a composite stratum interval to be subjected to shield tunneling construction, and performing stratum section analysis on a longitudinal geological section map of the composite stratum interval;
s2, collecting shield excavation tunneling data of the composite stratum similar to the composite stratum interval, and performing secondary processing on the shield excavation tunneling data to obtain a composite stratum shield tunneling parameter database;
the method for performing secondary processing on the shield excavation tunneling data comprises the following steps:
selecting the average rotating force arm of thrust T, torque T, cutting depth per revolution h and cutter head torque in shield tunneling parameters
Secondary processing is carried out on the shield tunneling parameters to obtain unit thrust
And unit torque
Unit thrust force
The shield thrust (kN/mm) and the unit torque required by the earth pressure shield tunneling machine for tunneling the unit length
The tangential force (kN m/mm) of the cutter head required by the unit cutting depth of tunneling is expressed;
s3, dividing a longitudinal geological profile after the formation profile analysis is completed into composite formation parts, and solving a composite ratio xi of the composite formation parts;
s4, performing shield tunneling, monitoring shield tunneling parameters including thrust and torque, screening the shield tunneling parameters by adopting a ground surface monitoring method while monitoring the shield tunneling parameters to obtain normal shield tunneling parameters, and supplementing a composite stratum shield tunneling parameter database;
s5, counting and processing the normal shield tunneling parameters, and calculating to obtain the unit thrust
And unit torque
Creating sheets by mathematical statistical principlesThrust force
Specific torque
And a fitting formula of the composite ratio xi, and obtaining a fitting formula of the thrust T, the torque F and the composite ratio xi according to the comprehensive condition of the shield tunneling parameters;
s6, guiding the setting of shield tunneling parameters through a fitting formula of the thrust T, the torque F and the composite ratio xi, substituting the composite ratio xi of the composite stratum obtained by dividing the composite stratum in the early stage into the fitting formula of the thrust T, the torque F and the composite ratio xi to calculate a setting suggestion value of the thrust T and the torque F, and guiding the setting of subsequent shield tunneling parameters;
and S7, repeating the steps S4-S6, and determining the optimal shield tunneling parameters under different compound ratios until the shield tunneling is finished.
2. The method for predicting shield tunneling parameters of different compound ratio compound stratums according to claim 1, wherein the method for solving the compound ratio xi of the compound stratum part in the step S3 comprises the following steps:
and defining the composite ratio xi in the composite stratum as the area ratio of the upper layer soil layer to the excavated surface, wherein the excavated surface comprises two soil layers.
3. The method for predicting shield tunneling parameters of different compound ratio compound strata according to claim 1, wherein the screening of the shield tunneling parameters by the method for monitoring the earth surface in the step S4 comprises the following steps:
monitoring the deformation of the earth surface to obtain a data value of the deformation of the earth surface; and analyzing the monitoring result of the surface deformation, comparing the surface deformation with the deformation control standard value, and judging whether the surface deformation exceeds the standard or not.
4. The method for predicting shield tunneling parameters of different compound ratio compound strata according to claim 3, wherein the processing method for judging whether the surface deformation exceeds the standard comprises the following steps:
if the deformation of the ground surface exceeds the standard, further monitoring and analyzing the thrust and the torque of the shield tunneling, analyzing the reason of the exceeding of the deformation of the ground surface, and determining the obtained shield tunneling data as abnormal shield tunneling data without entering a database;
if the deformation of the earth surface does not exceed the standard, the normal shield tunneling data is determined, and the data is stored in a database.
5. The method for predicting shield tunneling parameters of different compound ratio compound strata according to claim 1, wherein the step of S5 for establishing unit thrust
Specific torque
The method of the fitting formula of the sum composite ratio xi is to use unit thrust
And unit torque
With a combined ratio xi in terms of power index y ═ ax b Fitting is performed.
6. The method for predicting shield tunneling parameters of different compound ratio compound strata according to claim 1, wherein the step of S7 is further followed by the steps of:
and (4) arranging all normal shield tunneling parameters, and adding the normal shield tunneling parameters to the composite stratum shield tunneling parameter database to form a new composite stratum shield tunneling parameter database.
7. A shield tunneling parameter prediction device for a composite stratum with different compound ratios, which executes the shield tunneling parameter prediction method for the composite stratum with different compound ratios according to any one of claims 1 to 6, is characterized by comprising the following steps:
a stratum section analysis module: the method comprises the steps of selecting a composite stratum interval to be subjected to shield tunneling construction, and carrying out stratum section analysis on a longitudinal geological section map of the composite stratum interval;
the module for collecting shield excavation tunneling data: the system comprises a data base, a data acquisition module, a data processing module and a data processing module, wherein the data base is used for collecting shield excavation tunneling data of a composite stratum similar to the composite stratum interval and carrying out secondary processing on the shield excavation tunneling data to obtain a composite stratum shield tunneling parameter database;
and a complex ratio solving module: the method is used for dividing a longitudinal geological profile map which completes the analysis of the stratigraphic profile into composite stratigraphic parts and solving the composite ratio xi of the composite stratigraphic parts;
normal shield tunnelling parameter screening module: the system is used for monitoring shield tunneling parameters including thrust and torque during shield tunneling, screening the shield tunneling parameters by adopting a ground surface monitoring method while monitoring the shield tunneling parameters to obtain normal shield tunneling parameters, and supplementing a composite stratum shield tunneling parameter database;
establishing a fitting formula module: the system is used for counting and processing the normal shield tunneling parameters and calculating to obtain unit thrust
And unit torque
Establishment of unit thrust by mathematical statistical principle
Specific torque
And a fitting formula of the composite ratio xi, and obtaining a fitting formula of the thrust T, the torque F and the composite ratio xi according to the comprehensive condition of the shield tunneling parameters;
a shield tunneling guide parameter setting module: guiding the setting of shield tunneling parameters through a fitting formula of the thrust T, the torque F and the composite ratio xi, substituting the composite ratio xi of the composite stratum obtained by dividing the composite stratum in the early stage into the fitting formula of the thrust T, the torque F and the composite ratio xi to calculate a setting suggested value of the thrust T and the torque F, and guiding the setting of subsequent shield tunneling parameters;
the optimal shield tunneling parameter calculation module: repeating the steps S4-S6, and determining the optimal shield tunneling parameters under different compound ratios until the shield tunneling is finished;
updating a composite stratum shield tunneling parameter database module: and the method is used for arranging all normal shield tunneling parameters and adding the normal shield tunneling parameters to the composite stratum shield tunneling parameter database to form a new composite stratum shield tunneling parameter database.
8. A computer readable storage medium having stored thereon a computer program, wherein the program when executed by a processor implements the steps of the method for predicting shield tunneling parameters for a different compound ratio compound formation according to any one of claims 1 to 6.
9. A computer apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the method of predicting shield tunneling parameters of different composite ratio composite strata according to any one of claims 1 to 6.
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