CN111255487A

CN111255487A - Design method, device, equipment and storage medium of tunnel steel frame

Info

Publication number: CN111255487A
Application number: CN202010076360.5A
Authority: CN
Inventors: 肖明清; 徐晨; 田四明; 王克金; 杨剑; 孙文昊
Original assignee: China Railway Siyuan Survey and Design Group Co Ltd
Current assignee: China Railway Siyuan Survey and Design Group Co Ltd
Priority date: 2020-01-23
Filing date: 2020-01-23
Publication date: 2020-06-09
Anticipated expiration: 2040-01-23
Also published as: CN111255487B

Abstract

The embodiment of the invention discloses a method, a device, equipment and a storage medium for designing a tunnel steel frame, wherein the method comprises the following steps: acquiring pressure parameter information of surrounding rocks on a tunnel to be built and strength parameter information of concrete sprayed on the tunnel to be built; comparing the pressure parameter information with the strength parameter information to obtain a comparison result; and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the comparison result.

Description

Design method, device, equipment and storage medium of tunnel steel frame

Technical Field

The invention relates to the technical field of tunnel engineering, in particular to a method, a device, equipment and a storage medium for designing a tunnel steel frame.

Background

The current mine method tunnel mainly adopts a spray anchor support composite lining form, a primary support system comprising an anchor rod, sprayed concrete and a steel frame is arranged, and then a secondary lining mainly made of molded concrete is arranged. At present, the steel frame is mainly designed by an engineering analogy method, and a great deal of controversy also exists on the supporting function of the steel frame. Generally, for surrounding rocks with poor stability, before sprayed concrete and anchor rods play a role, a steel frame needs to bear partial surrounding rock pressure independently, the value of the partial surrounding rock pressure is not specified, generally 50% of an empirical formula is adopted, or 4m or 6m earth columns are adopted, and due to the fact that the methods lack accurate theoretical basis by experience, quantitative evaluation on whether the steel frame is needed for tunnel primary support or not cannot be conducted so far, the type and parameters of the steel frame cannot be selected, safety and economy cannot be guaranteed, and an effective solution is not available at present.

Disclosure of Invention

In view of this, embodiments of the present invention are intended to provide a method, an apparatus, a device, and a storage medium for designing a tunnel steel frame.

The technical embodiment of the invention is realized as follows:

the embodiment of the invention provides a design method of a tunnel steel frame, which comprises the following steps:

acquiring pressure parameter information of surrounding rocks on a tunnel to be built and strength parameter information of concrete sprayed on the tunnel to be built;

comparing the pressure parameter information with the strength parameter information to obtain a comparison result;

and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the comparison result.

In the foregoing solution, the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the comparison result includes:

determining a first safety factor of the concrete layer according to the strength parameter information and the pressure parameter information under the condition that the comparison result shows that the strength parameter information is smaller than the pressure parameter information; the concrete layer is formed by concrete sprayed to the tunnel to be built;

judging whether the first safety factor is greater than or equal to a preset first safety factor or not, and obtaining a first judgment result;

and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the first judgment result.

In the foregoing solution, the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the first determination result includes:

determining that a steel frame is not required to be arranged in the tunnel building process to be built under the condition that the first judgment result shows that the first safety factor is greater than or equal to the preset first safety factor;

determining that a steel frame needs to be arranged in the tunnel building process to be built under the condition that the first judgment result shows that the first safety factor is smaller than the preset first safety factor; the steel frame is a profile steel frame.

obtaining the stress form of the concrete layer under the condition that the comparison result shows that the strength parameter information is greater than or equal to the pressure parameter information; the concrete layer is formed by concrete sprayed to the tunnel to be built;

and determining whether a steel frame needs to be arranged in the process of establishing the tunnel to be established according to the stress form.

In the above solution, the obtaining of the stressed state of the concrete layer includes:

determining a bending moment and an axial force value of the first section according to the load structure model of the concrete layer; the first section is any section in the concrete layer;

and determining the stress form of the concrete layer based on the bending moment and the axial force value.

In the above scheme, the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established according to the stress form includes:

under the condition that the stress form represents that the concrete layer is in a small eccentric compression state, determining that a steel frame is not needed to be arranged in the process of establishing the tunnel to be established;

under the condition that the stress form represents that the concrete layer is in a large eccentricity compression state, determining a second safety coefficient of the concrete layer according to the bending moment and the axial force value;

judging whether the second safety factor is greater than or equal to a preset second safety factor or not, and obtaining a second judgment result;

and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the second judgment result.

In the foregoing solution, the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the second determination result includes:

determining that a steel frame is not required to be arranged in the tunnel building process to be built under the condition that the second judgment result shows that the second safety factor is greater than or equal to the preset second safety factor;

determining that a steel frame needs to be arranged in the tunnel building process to be built under the condition that the second judgment result shows that the second safety factor is smaller than the preset second safety factor; the type of the steel frame is a grid steel frame.

In the above scheme, after it is determined that the section steel frame needs to be set in the process of establishing the tunnel to be established, the method further includes:

determining a first size parameter and a first distance parameter of the steel frame to be set based on the first safety factor;

determining a first combined structure of the profile steel frame to be arranged and the concrete layer based on the first size parameter and the first distance parameter; the first composite structure is a structure for supporting the surrounding rock;

and adjusting the first size parameter and the first distance parameter to enable the safety coefficient of the first combined structure to meet the preset first safety coefficient.

In the above scheme, after it is determined that a grid steel frame needs to be set in the process of establishing the tunnel to be established, the method further includes:

determining a second size parameter and a second distance parameter of the grid steel frame to be set based on the second safety coefficient;

determining a second combined structure of the grid steel frame to be arranged and the concrete layer based on the second size parameter and the second spacing parameter; the second combined structure is a structure for supporting the surrounding rock;

and adjusting the second size parameter and the second distance parameter to enable the safety coefficient of the second combined structure to meet the preset second safety coefficient.

The embodiment of the invention provides a design device of a tunnel steel frame, which comprises: an obtaining unit, a comparing unit and a determining unit, wherein:

the acquiring unit is used for acquiring pressure parameter information of a tunnel to be built of surrounding rocks and strength parameter information of concrete sprayed to the tunnel to be built;

the comparing unit is used for comparing the pressure parameter information and the strength parameter information obtained by the obtaining unit to obtain a comparison result;

the determining unit is configured to determine whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the comparison result obtained by the comparing unit.

In the foregoing aspect, the determining unit includes: a first determining subunit and a judging subunit, wherein:

the first determining subunit is configured to determine a first safety factor of the concrete layer according to the strength parameter information and the pressure parameter information when the comparison result indicates that the strength parameter information is smaller than the pressure parameter information; the concrete layer is formed by concrete sprayed to the tunnel to be built;

the judging subunit is configured to judge whether the first safety factor determined by the first determining subunit is greater than or equal to a preset first safety factor, and obtain a first judgment result;

the first determining subunit is further configured to determine, based on the first determination result obtained by the determining subunit, whether a steel frame needs to be set in the tunnel to be established in the building process.

In the above scheme, the first determining subunit is further configured to determine that a steel frame is not required to be set in the process of establishing the tunnel to be established when the first determination result indicates that the first safety factor is greater than or equal to the preset first safety factor; determining that a steel frame needs to be arranged in the tunnel building process to be built under the condition that the first judgment result shows that the first safety factor is smaller than the preset first safety factor; the steel frame is a profile steel frame.

In the foregoing solution, the determining unit further includes: obtaining a subunit and a second determining subunit, wherein:

the obtaining subunit is configured to obtain a stressed state of the concrete layer when the comparison result indicates that the strength parameter information is greater than or equal to the pressure parameter information; the concrete layer is formed by concrete sprayed to the tunnel to be built;

and the second determining subunit is used for determining whether a steel frame needs to be arranged in the process of establishing the tunnel to be established according to the stress form.

In the above scheme, the obtaining subunit is further configured to determine a bending moment and an axial force value of the first cross section according to the load structure model of the concrete layer; the first section is any section in the concrete layer; and determining the stress form of the concrete layer based on the bending moment and the axial force value.

In the above scheme, the second determining subunit is further configured to determine that a steel frame is not required to be arranged in the process of establishing the tunnel to be established, when the stress form represents that the concrete layer is in a small eccentric compression state; under the condition that the stress form represents that the concrete layer is in a large eccentricity compression state, determining a second safety coefficient of the concrete layer according to the bending moment and the axial force value; judging whether the second safety factor is greater than or equal to a preset second safety factor or not, and obtaining a second judgment result; and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the second judgment result.

In the above scheme, the second determining subunit is further configured to determine that a steel frame is not required to be set in the process of establishing the tunnel to be established when the second determination result indicates that the second safety factor is greater than or equal to the preset second safety factor; determining that a steel frame needs to be arranged in the tunnel building process to be built under the condition that the second judgment result shows that the second safety factor is smaller than the preset second safety factor; the type of the steel frame is a grid steel frame.

In the above solution, the apparatus further comprises a first adjusting unit,

the determining unit is further used for determining a first size parameter and a first distance parameter of the steel frame to be set based on the first safety factor; determining a first combined structure of the profile steel frame to be arranged and the concrete layer based on the first size parameter and the first distance parameter; the first composite structure is a structure for supporting the surrounding rock;

the first adjusting unit is used for adjusting the first size parameter and the first distance parameter to enable the safety coefficient of the first combined structure to meet the preset first safety coefficient.

In the above solution, the apparatus further comprises a second adjusting unit,

the determining unit is further used for determining a second size parameter and a second distance parameter of the grid steel frame to be set based on the second safety coefficient; determining a second combined structure of the grid steel frame to be arranged and the concrete layer based on the second size parameter and the second spacing parameter; the second combined structure is a structure for supporting the surrounding rock;

and the second adjusting unit is used for adjusting the second size parameter and the second distance parameter to enable the safety coefficient of the second combined structure to meet the preset second safety coefficient.

The embodiment of the invention provides a design device of a tunnel steel frame, which comprises a memory and a processor, wherein the memory stores a computer program capable of running on the processor, and the processor executes the program to realize any step of the method.

Embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements any of the steps of the above-mentioned method.

The embodiment of the invention provides a method, a device, equipment and a storage medium for designing a tunnel steel frame, wherein the method comprises the following steps: acquiring pressure parameter information of surrounding rocks on a tunnel to be built and strength parameter information of concrete sprayed on the tunnel to be built; comparing the pressure parameter information with the strength parameter information to obtain a comparison result; and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the comparison result. By adopting the technical scheme of the embodiment of the invention, the pressure parameter information and the strength parameter information are compared, and whether a steel frame is required to be arranged in the process of establishing the tunnel to be established is determined based on the comparison result, so that whether the steel frame is required for the preliminary support of the tunnel is quantitatively evaluated, and the safety and the economical efficiency of the tunnel to be established are further ensured.

Drawings

Fig. 1 is a schematic view illustrating an implementation flow of a design method of a tunnel steel frame according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a pressure curve and a strength curve in a method for designing a tunnel steel frame according to an embodiment of the present invention;

fig. 3 is a schematic view of a load structure model of a concrete layer in the design method of a tunnel steel frame according to the embodiment of the invention;

FIG. 4 is a schematic diagram of a structural configuration of a device for designing a tunnel steel frame according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a hardware entity structure of a device for designing a tunnel steel frame according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following describes specific technical solutions of the present invention in further detail with reference to the accompanying drawings in the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The embodiment provides a method for designing a tunnel steel frame, which is applied to a design device, and functions implemented by the method can be implemented by calling a program code through a processor in the design device, where of course, the program code can be stored in a computer storage medium, and thus, the computing device at least includes a processor and a storage medium.

Fig. 1 is a schematic flow chart of an implementation of a method for designing a tunnel steel frame according to an embodiment of the present invention, and as shown in fig. 1, the method includes:

step S101: and acquiring pressure parameter information of the surrounding rock on the tunnel to be built and strength parameter information of concrete sprayed to the tunnel to be built.

In this embodiment, pressure parameter information of the surrounding rock to the tunnel to be built is obtained, where the pressure parameter information may include a time-dependent change curve of the pressure of the surrounding rock to the tunnel to be built, and may be recorded as a surrounding rock pressure-time curve, and the change curve may also be understood as a time-dependent increase curve of the pressure of the surrounding rock to the tunnel to be built, the pressure parameter information may be obtained according to basic information related to the tunnel to be built, and the basic information may include mechanical parameters of the surrounding rock of the tunnel to be built, such as the weight, cohesive force, internal friction angle, elastic resistance coefficient, and the like; the section shape and the burial depth of the tunnel to be built; and testing the tunnel to be built on site according to the basic information to obtain the pressure values of the tunnel to be built of the surrounding rocks at different times, so as to obtain the surrounding rock pressure parameter information of the tunnel to be built.

Acquiring strength parameter information of the concrete sprayed to the tunnel to be built; the strength parameter information may include a variation curve of the strength of the sprayed concrete to the tunnel to be built along with time, which may be recorded as a strength-time curve of the sprayed concrete, and the variation curve may also be understood as an increase curve of the strength of the sprayed concrete to the tunnel to be built along with time; the sprayed concrete is prepared by mixing and stirring cement, sand and stone according to a certain proportion, sending the mixture into a concrete sprayer, using compressed air to press and send the dry mixed material to a spray head, adding water at a water ring of the spray head, spraying the mixture to the surface of surrounding rock at a high speed, and playing a role in supporting.

Step S102: and comparing the pressure parameter information with the strength parameter information to obtain a comparison result.

In this embodiment, the comparing the pressure parameter information and the strength parameter information may be to draw a surrounding rock pressure-time curve in the pressure parameter information and a strength-time curve of the shotcrete in the strength parameter information in a preset coordinate system, and compare the magnitude of the increase speed of the surrounding rock pressure and the increase speed of the strength of the shotcrete at a preset time based on the surrounding rock pressure-time curve and the strength-time curve of the shotcrete, so as to obtain a comparison result that the increase speed of the strength of the shotcrete is smaller than the increase speed of the surrounding rock pressure, or obtain a comparison result that the increase speed of the strength of the shotcrete is greater than or equal to the increase speed of the surrounding rock pressure; the preset coordinate system can be a two-dimensional coordinate system; the preset time can be determined according to actual conditions.

As an example, the pressure-time curve of the surrounding rock in the pressure parameter information and the strength-time curve of the shotcrete in the strength parameter information may be normalized, and two normalized curves may be plotted in the same coordinate system, and the growth rates of the two curves may be compared to obtain a comparison result.

For better understanding, the pressure parameter information is assumed to be a pressure curve and the intensity parameter information is assumed to be an intensity curve. FIG. 2 is a schematic diagram of a pressure curve and a strength curve in a method for designing a tunnel steel frame according to an embodiment of the present invention; as shown in fig. 2, the abscissa is time, the ordinate is a value obtained by normalizing the pressure parameter information and the intensity parameter information, 1 is a pressure curve, 2 is a first intensity curve, i.e., one intensity curve, and 3 is a second intensity curve, i.e., another intensity curve, and it can be seen from fig. 2 that the increase rate of the first intensity curve is greater than the increase rate of the pressure curve; the second intensity curve increases at a rate less than the rate of increase of the pressure curve, i.e. the pressure parameter information and the intensity parameter information are compared, obtaining an example of a comparison.

Step S103: and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the comparison result.

In this embodiment, determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the comparison result may be determining whether a steel frame needs to be set in the process of establishing the tunnel to be established, if the comparison result indicates that the strength parameter information is smaller than the pressure parameter information; and determining whether a steel frame needs to be arranged in the process of establishing the tunnel to be established or not under the condition that the comparison result shows that the strength parameter information is greater than or equal to the pressure parameter information.

As an example, when the comparison result shows that the strength parameter information is smaller than the pressure parameter information, determining whether a steel frame needs to be set in the process of establishing the tunnel to be established may be to obtain the safety factor of the concrete layer when the comparison result shows that the strength parameter information is smaller than the pressure parameter information; the concrete layer is formed by concrete sprayed to the tunnel to be built; judging whether the safety coefficient is greater than or equal to a preset safety coefficient or not, and obtaining a judgment result; determining whether a steel frame needs to be set in the tunnel building process to be built or not based on the judgment result; determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the judgment result, wherein the steel frame needs to be set under the condition that the safety coefficient is smaller than a preset safety coefficient; the preset safety factor can be a coefficient required by the safety design of the tunnel.

As an example, in a case that the comparison result indicates that the strength parameter information is greater than or equal to the pressure parameter information, determining whether a steel frame needs to be set in the process of establishing the tunnel to be established may be to obtain a stressed state of a concrete layer in a case that the comparison result indicates that the strength parameter information is greater than or equal to the pressure parameter information; the concrete layer is formed by concrete sprayed to the tunnel to be built; determining whether a steel frame needs to be arranged in the process of establishing the tunnel to be established according to the stress form; determining whether a steel frame needs to be arranged in the process of establishing the tunnel to be built according to the stress form, wherein the safety factor of the concrete layer can be obtained under the condition that the stress form represents that the concrete layer is in a large eccentric compression state, judging whether the safety factor is greater than or equal to a preset safety factor, and arranging the steel frame under the condition that the safety factor is less than the preset safety factor; the preset safety factor can be a coefficient required by the safety design of the tunnel.

According to the design method of the tunnel steel frame provided by the embodiment of the invention, pressure parameter information of surrounding rocks on a tunnel to be built and strength parameter information of concrete sprayed on the tunnel to be built are obtained; comparing the pressure parameter information with the strength parameter information to obtain a comparison result; and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the comparison result. By adopting the technical scheme of the embodiment of the invention, the pressure parameter information and the strength parameter information are compared, and whether a steel frame is required to be arranged in the process of establishing the tunnel to be established is determined based on the comparison result, so that whether the steel frame is required for the preliminary support of the tunnel is quantitatively evaluated, and the safety and the economical efficiency of the tunnel to be established are further ensured.

In an optional embodiment of the present invention, the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the comparison result includes: determining a first safety factor of the concrete layer according to the strength parameter information and the pressure parameter information under the condition that the comparison result shows that the strength parameter information is smaller than the pressure parameter information; the concrete layer is formed by concrete sprayed to the tunnel to be built; judging whether the first safety factor is greater than or equal to a preset first safety factor or not, and obtaining a first judgment result; and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the first judgment result.

Determining a first safety coefficient of a concrete layer according to the strength parameter information and the pressure parameter information under the condition that the comparison result shows that the strength parameter information is smaller than the pressure parameter information, wherein under the condition that the comparison result shows that the increase speed of the strength of the sprayed concrete is smaller than the increase speed of the surrounding rock pressure, a concrete layer load structure model is simulated according to the strength parameter information and the pressure parameter information, and the first safety coefficient of the concrete layer is determined according to the concrete layer load structure model; wherein the first safety factor can be the safety factor of the concrete in the concrete layer in the hardening process; the concrete layer load structure model can be a finite element model, the concrete layer can be simulated by adopting the beam unit, the interaction between the structure and the stratum can be simulated by adopting a tension-free radial spring and a tangential spring, the elastic modulus of the beam unit is related to the spraying strength of the concrete, the larger the spraying strength of the general concrete is, the larger the elastic modulus of the beam unit is, namely the elastic modulus of the beam unit is in direct proportion to the strength of the sprayed concrete. The relation between the strength of the sprayed concrete and the time can be embodied as the relation between the hardening speed of the sprayed concrete and the time, and if the hardening speed of the sprayed concrete is too low, the first safety factor can not meet the design requirement of the tunnel during construction.

Judging whether the first safety factor is greater than or equal to a preset first safety factor or not, and obtaining a first judgment result; the preset first safety factor can be the lowest safety factor which needs to be met by setting a steel frame when concrete is sprayed to the tunnel, and can also be understood as the safety factor required by the safety design of the tunnel, and the value of the preset first safety factor can be comprehensively determined according to engineering importance, engineering geological conditions, construction level and the like; as an example, the preset first safety factor may be any value between 1.8 and 2.0. The first determination result may be that the first safety factor is greater than or equal to a preset first safety factor and that the first safety factor is less than the preset first safety factor.

Determining whether a steel frame needs to be set in the tunnel to be built based on the first judgment result, wherein the steel frame does not need to be set in the tunnel to be built under the condition that the first safety factor is greater than or equal to the preset first safety factor; and determining that a steel frame needs to be arranged in the process of establishing the tunnel to be established under the condition that the first safety factor is smaller than the preset first safety factor.

For convenience of understanding, fig. 3 is a schematic view of a load structure model of a concrete layer in a design method of a tunnel steel frame according to an embodiment of the present invention; as shown in fig. 3, 11 is a beam unit, 12 is a radial spring, 13 is a tangential spring, and 14 is load distribution; wherein the stiffness of the radial spring and the stiffness of the tangential spring are positively correlated with the strength of the concrete sprayed to the tunnel to be built, and as an example, when the strength of the concrete sprayed to the tunnel to be built reaches the design strength, the stiffness of the tangential spring is 1/3 of the stiffness of the radial no-pull spring; the load distribution is surrounding rock pressure which can be generally simplified into arch uniform pressure and horizontal uniform pressure, then the load is distributed on the beam unit through a finite element model, and the safety coefficient of the concrete in the concrete layer in the hardening process can be obtained according to the load structure model of the concrete layer, namely the first safety coefficient; so as to judge whether the first safety factor is greater than or equal to a preset first safety factor to obtain a first judgment result; and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the first judgment result.

In an optional embodiment of the present invention, the determining, based on the first determination result, whether a steel frame needs to be set in the process of establishing the tunnel to be established includes:

In this embodiment, first judgement result shows first factor of safety is greater than or equal to under the condition of first factor of safety of predetermineeing, confirm treat to build the tunnel and establish the in-process need not set up the steelframe and can understand that the factor of safety of concrete in the concrete layer in the hardening process is greater than or equal to the factor of safety that the tunnel safety designed required, tunnel preliminary bracing does not need the steelframe, alright satisfy the tunnel safety designed requirement.

Determining that a steel frame needs to be arranged in the tunnel building process to be built under the condition that the first judgment result shows that the first safety factor is smaller than the preset first safety factor; the type of steelframe can understand for the shaped steel steelframe that the factor of safety of concrete in the concrete layer in the hardening process is less than the factor of safety that the tunnel safety design required, can't ensure the security of waiting to build the tunnel, tunnel preliminary bracing promptly need set up the steelframe to provide holding power and exert earlier the bearing effect, make the factor of safety of waiting to build the tunnel can satisfy the tunnel safety design requirement, ensures the security of waiting to build the tunnel.

The type of the steel frame is a profile steel frame, mainly because the hardening speed of a concrete layer is too low, the safety coefficient cannot meet the safety design requirement of the tunnel during the construction of the tunnel to be built, and the profile steel frame needs to be arranged to play a role of early bearing; the grid steel frame has weaker load bearing capacity independently, and the function of early bearing is not obvious; therefore, the steel frame is a steel frame.

In an optional embodiment of the present invention, the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the comparison result includes: obtaining the stress form of the concrete layer under the condition that the comparison result shows that the strength parameter information is greater than or equal to the pressure parameter information; the concrete layer is formed by concrete sprayed to the tunnel to be built; and determining whether a steel frame needs to be arranged in the process of establishing the tunnel to be established according to the stress form.

In this embodiment, the concrete layer formed by the concrete sprayed to the tunnel to be built may be a concrete layer formed by the sprayed concrete, where the comparison result indicates that the strength parameter information is greater than or equal to the pressure parameter information.

Under the condition that the comparison result shows that the strength parameter information is greater than or equal to the pressure parameter information, the stress form of the concrete layer can be obtained by simulating a concrete layer load structure model according to the strength parameter information and the pressure parameter information and obtaining the stress form of the concrete layer according to the concrete layer load structure model under the condition that the comparison result shows that the increase speed of the strength of the sprayed concrete is greater than or equal to the increase speed of the surrounding rock pressure; wherein the first safety factor can be the safety factor of the concrete in the concrete layer in the hardening process; concrete layer load structure model can be finite element model, and concrete layer can adopt the simulation of roof beam unit, and structure and stratum interact can adopt and do not have radial spring and tangential spring simulation, and the elastic modulus of roof beam unit is relevant with the spray intensity of concrete, and the spray intensity of general concrete is big more, and the elastic modulus of roof beam unit is positive correlation with the intensity of sprayed concrete promptly.

In an alternative embodiment of the present invention, the obtaining of the stressed configuration of the concrete layer includes: determining a bending moment and an axial force value of the first section according to the load structure model of the concrete layer; the first section is any section in the concrete layer; and determining the stress form of the concrete layer based on the bending moment and the axial force value.

In this embodiment, concrete layer includes a plurality of cross-sections, and every cross-section all can receive the effect of country rock pressure, and different pressure can make the cross-section produce different moment of flexure and axial force value, and general pressure is big more, and the moment of flexure and the axial force value of cross-section are also big more. For the sake of better description, the first section is used here to refer to any section in the concrete layer.

Determining the stress form of the concrete layer based on the bending moment and the axial force value can be understood as determining the stress form of the concrete layer based on the bending moment and the axial force value of each section; wherein, the stress state can comprise a small eccentric compression state and a large eccentric compression state; the small eccentric compression state can be understood that each section of the concrete layer is mainly compressed; the large eccentric compression state can be understood as the condition that the concrete layer is locally tensioned; and determining the stress state of the concrete layer according to the stress condition of each section of the concrete layer.

In an optional embodiment of the present invention, the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established according to the stress form includes: under the condition that the stress form represents that the concrete layer is in a small eccentric compression state, determining that a steel frame is not needed to be arranged in the process of establishing the tunnel to be established; under the condition that the stress form represents that the concrete layer is in a large eccentricity compression state, determining a second safety coefficient of the concrete layer according to the bending moment and the axial force value; judging whether the second safety factor is greater than or equal to a preset second safety factor or not, and obtaining a second judgment result; and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the second judgment result.

In this embodiment, when the stress form represents that the concrete layer is in a small eccentric compression state, it is determined that the concrete layer is mainly compressed without arranging a steel frame in the process of establishing the tunnel to be built, and the concrete itself is a better compression-resistant material, so that the steel frame is not required to improve the bearing capacity of the concrete layer when the concrete layer is subjected to small eccentric compression.

Under the condition that the stress form represents that the concrete layer is in a large eccentricity compression state, determining a second safety coefficient of the concrete layer according to the bending moment and the axial force value can be understood as a condition that the concrete layer is locally tensioned, and determining the second safety coefficient of the concrete layer according to a breakage stage method in railway tunnel design specification TB10003-2016 according to the bending moment and the axial force value; .

Judging whether the second safety factor is greater than or equal to a preset second safety factor or not, and obtaining a second judgment result; the preset second safety factor can be a safety factor required by tunnel safety design, and the value of the preset second safety factor can be comprehensively determined according to engineering importance, engineering geological conditions, construction level and the like; as an example, the preset second safety factor may be any value between 1.8 and 2.0. The second determination result may be that the second safety factor is greater than or equal to a preset second safety factor and that the second safety factor is less than the preset second safety factor.

Determining whether a steel frame needs to be set in the tunnel to be built based on the second judgment result, wherein the steel frame does not need to be set in the tunnel to be built under the condition that the second safety factor is greater than or equal to the preset second safety factor; and determining that a steel frame needs to be arranged in the process of establishing the tunnel to be established under the condition that the second safety factor is smaller than the preset second safety factor.

In an optional embodiment of the present invention, the determining, based on the second determination result, whether a steel frame needs to be set in the process of establishing the tunnel to be established includes: determining that a steel frame is not required to be arranged in the tunnel building process to be built under the condition that the second judgment result shows that the second safety factor is greater than or equal to the preset second safety factor; determining that a steel frame needs to be arranged in the tunnel building process to be built under the condition that the second judgment result shows that the second safety factor is smaller than the preset second safety factor; the type of the steel frame is a grid steel frame.

In this embodiment, when the second determination result indicates that the second safety factor is greater than or equal to the preset second safety factor, it is determined that it is not necessary to set a steel frame in the process of establishing the tunnel to be built, and it can be understood that although the stress form of the concrete layer represents that the concrete layer is in a large eccentricity compression state, the safety factor of the concrete in the hardening process is greater than or equal to the safety factor required by the safety design of the tunnel, and the safety factor of the bearing capacity of the concrete layer when the concrete layer is pressed against the large eccentricity satisfies the safety design requirement of the tunnel, and the steel frame is not necessary to be set to improve the bearing capacity of the concrete layer when the concrete layer is pressed against the large eccentricity.

The second judgment result shows that the second safety factor is smaller than the second preset safety factor, the tunnel to be built is determined to be required to be set with a steel frame in the building process of the tunnel to be built, the stress form of the concrete layer can be understood to represent that the concrete layer is in a large eccentricity compression state, but the safety factor of the concrete in the hardening process is smaller than that of the tunnel, the safety factor of the bearing capacity of the concrete layer when the concrete layer is stressed by large eccentricity does not meet the safety design requirement of the tunnel, the bearing capacity of the concrete layer when the concrete layer is stressed by large eccentricity needs to be improved by setting the steel frame, namely, the steel frame is required to be set in the building process of the tunnel to be built, so that the safety factor of the tunnel to be built can meet the safety design requirement of the tunnel, and the safety of the tunnel.

The steel frame is a grid steel frame mainly because the stress form of the concrete layer represents that the concrete layer is in a large eccentricity compression state, but the safety coefficient of the concrete in the hardening process is smaller than that of the safety design requirement of the tunnel, the safety coefficient of the bearing capacity of the concrete layer when the concrete layer is subjected to large eccentricity compression does not meet the safety design requirement of the tunnel, and the steel frame is required to be arranged to improve the bearing capacity of the concrete layer when the concrete layer is subjected to large eccentricity compression; the grid steel frame is weak in load bearing capacity independently, so that the effect of early bearing is not obvious, but the bearing capacity of the concrete layer is obviously improved when the concrete layer is stressed by large eccentricity; the steel frame has obvious early bearing effect, but the bearing capacity for improving the concrete layer to bear large eccentric stress is not obvious; therefore, the steel frame is a grid steel frame.

In an optional embodiment of the present invention, after determining that the steel frame needs to be set in the process of establishing the tunnel to be built, the method further includes: determining a first size parameter and a first distance parameter of the steel frame to be set based on the first safety factor; determining a first combined structure of the profile steel frame to be arranged and the concrete layer based on the first size parameter and the first distance parameter; the first composite structure is a structure for supporting the surrounding rock; and adjusting the first size parameter and the first distance parameter to enable the safety coefficient of the first combined structure to meet the preset first safety coefficient.

In the embodiment, a first size parameter and a first distance parameter of the profile steel frame to be set are determined based on the first safety factor; the first size parameter is determined by the type of the steel frame to be set, the size parameters corresponding to different types of steel frames are different, the type of the steel frame to be set is determined according to the first safety coefficient, and the first size parameter of the steel frame to be set is determined according to the type; the first distance parameter is a distance parameter between the section steel frames; the distance parameters may include a lateral distance and a longitudinal distance between the profile steel frames.

Determining a first combined structure of the profile steel frame to be arranged and the concrete layer based on the first size parameter and the first distance parameter; the first combined structure is a load structure model simulating a profile steel frame and a concrete layer, and is marked as a profile steel-concrete combined structure, the load structure model can be a finite element model, the concrete layer can be simulated by adopting beam units, and the rigidity of the beam units is the rigidity of the profile steel-concrete combined structure.

Adjusting first size parameter with first interval parameter makes first integrated configuration's factor of safety satisfies the adjustment in shaped steel steelframe and concrete layer's load structure model can be understood as for the first factor of safety of predetermineeing the model of the shaped steel steelframe that treats the setting and the distance between shaped steel steelframe and the shaped steel steelframe to the factor that the factor of safety that makes shaped steel steelframe and concrete layer's load structure model satisfies the requirement of tunnel safety design.

In this embodiment, after it is determined that the profile steel frame needs to be set in the process of establishing the tunnel to be established, the safety factor of the first composite structure meets the preset first safety factor by adjusting the first size parameter and the first distance parameter, so as to implement the quantitative design of the profile steel frame parameters.

In an optional embodiment of the present invention, after determining that a grid steel frame needs to be set in the process of establishing the tunnel to be established, the method further includes: determining a second size parameter and a second distance parameter of the grid steel frame to be set based on the second safety coefficient; determining a second combined structure of the grid steel frame to be arranged and the concrete layer based on the second size parameter and the second spacing parameter; the second combined structure is a structure for supporting the surrounding rock; and adjusting the second size parameter and the second distance parameter to enable the safety coefficient of the second combined structure to meet the preset second safety coefficient.

In the embodiment, a second size parameter and a second distance parameter of the grid steel frame to be set are determined based on the second safety factor; the second size parameter is determined by the model of the grid steel frame to be set, the size parameters corresponding to different models of grid steel frames are different, the model of the grid steel frame to be set is determined according to the first safety coefficient, and the second size parameter of the grid steel frame to be set is determined according to the model; the second distance parameter is a distance parameter between the grid steel frames, and the distance parameter may include a transverse distance and a longitudinal distance between the grid steel frames.

Determining a second combined structure of the grid steel frame to be arranged and the concrete layer based on the second size parameter and the second spacing parameter; the second combined structure can be a load structure model of a simulation type grid steel frame and a concrete layer and is marked as a grid steel frame-concrete combined structure, the load structure model can be a finite element model, the concrete layer can be simulated by adopting beam units, and the rigidity of the beam units adopts the rigidity of the grid steel frame-concrete combined structure; and in the detection and calculation of the safety coefficient of the grid steel frame-concrete combined structure, the main reinforcements on the inner side and the outer side of the grid steel frame are used as the outer side reinforcing reinforcements of the concrete structure.

Adjusting the second size parameter with the second distance parameter makes the factor of safety of second integrated configuration satisfies preset second factor of safety can be understood as adjusting in the load structure model of grid steelframe and concrete layer the model of the grid steelframe that treats setting and the distance between grid steelframe and the grid steelframe to the factor that the factor of safety that makes the load structure model of type grid steelframe and concrete layer satisfies the requirement of tunnel safety design.

In this embodiment, after it is determined that the grid steel frame needs to be set in the process of establishing the tunnel to be established, the safety factor of the second combined structure meets the preset second safety factor by adjusting the second size parameter and the second distance parameter, so as to implement the quantitative design of the grid steel frame parameters.

In this embodiment, a design apparatus for a tunnel steel frame is provided, and fig. 4 is a schematic structural diagram of a design apparatus for a tunnel steel frame according to an embodiment of the present invention, as shown in fig. 4, the apparatus 200 includes: an obtaining unit 201, a comparing unit 202 and a determining unit 203, wherein:

the obtaining unit 201 is configured to obtain pressure parameter information of a tunnel to be built by surrounding rocks and strength parameter information of concrete sprayed to the tunnel to be built.

The comparing unit 202 is configured to compare the pressure parameter information and the strength parameter information obtained by the obtaining unit 201, so as to obtain a comparison result.

The determining unit 203 is configured to determine whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the comparison result obtained by the comparing unit 202.

In other embodiments, the determining unit 203 includes: a first determining subunit and a judging subunit, wherein:

In other embodiments, the first determining subunit is further configured to determine that a steel frame is not required to be set in the tunnel to be built in the building process when the first determination result indicates that the first safety factor is greater than or equal to the preset first safety factor; determining that a steel frame needs to be arranged in the tunnel building process to be built under the condition that the first judgment result shows that the first safety factor is smaller than the preset first safety factor; the steel frame is a profile steel frame.

In other embodiments, the determining unit 203 further includes: obtaining a subunit and a second determining subunit, wherein:

In other embodiments, the obtaining subunit is further configured to determine a bending moment and an axial force value of the first cross section according to the load structure model of the concrete layer; the first section is any section in the concrete layer; and determining the stress form of the concrete layer based on the bending moment and the axial force value.

In other embodiments, the second determining subunit is further configured to determine that a steel frame is not required to be arranged in the process of establishing the tunnel to be established when the stress form represents that the concrete layer is in a small eccentric stress state; under the condition that the stress form represents that the concrete layer is in a large eccentricity compression state, determining a second safety coefficient of the concrete layer according to the bending moment and the axial force value; judging whether the second safety factor is greater than or equal to a preset second safety factor or not, and obtaining a second judgment result; and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the second judgment result.

In other embodiments, the second determining subunit is further configured to determine that a steel frame is not required to be set in the tunnel to be built in the building process when the second determination result indicates that the second safety factor is greater than or equal to the preset second safety factor; determining that a steel frame needs to be arranged in the tunnel building process to be built under the condition that the second judgment result shows that the second safety factor is smaller than the preset second safety factor; the type of the steel frame is a grid steel frame.

In other embodiments, the apparatus 200 further comprises a first adjustment unit,

the determining unit 203 is further configured to determine a first size parameter and a first distance parameter of the steel frame to be set based on the first safety factor; determining a first combined structure of the profile steel frame to be arranged and the concrete layer based on the first size parameter and the first distance parameter; the first composite structure is a structure for supporting the surrounding rock;

In other embodiments, the apparatus 200 further comprises a second adjustment unit,

the determining unit 203 is further configured to determine a second size parameter and a second distance parameter of the grid steel frame to be set based on the second safety factor; determining a second combined structure of the grid steel frame to be arranged and the concrete layer based on the second size parameter and the second spacing parameter; the second combined structure is a structure for supporting the surrounding rock;

The above description of the apparatus embodiments, similar to the above description of the method embodiments, has similar beneficial effects as the method embodiments. For technical details not disclosed in the embodiments of the apparatus according to the invention, reference is made to the description of the embodiments of the method according to the invention for understanding.

It should be noted that, in the embodiment of the present invention, if the above-mentioned design method for a tunnel steel frame is implemented in the form of a software functional module and is sold or used as an independent product, it may also be stored in a computer-readable storage medium. Based on such understanding, the technical embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for enabling a design device of a tunnel steel frame (which may be a personal computer, a server, or a network device) to execute all or part of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, an embodiment of the present invention provides a design apparatus for a tunnel steel frame, which includes a memory and a processor, where the memory stores a computer program that can run on the processor, and the processor executes the computer program to implement the steps in the design method for a tunnel steel frame provided in the above embodiment.

Correspondingly, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps in the method for designing a tunnel steel frame provided in the foregoing embodiment.

Here, it should be noted that: the above description of the storage medium and device embodiments is similar to the description of the method embodiments above, with similar advantageous effects as the method embodiments. For technical details not disclosed in the embodiments of the storage medium and the apparatus according to the invention, reference is made to the description of the embodiments of the method according to the invention.

It should be noted that fig. 5 is a schematic structural diagram of a hardware entity of a design apparatus for a tunnel steel frame in an embodiment of the present invention, and as shown in fig. 5, a hardware entity of the design apparatus 300 for a tunnel steel frame includes: a processor 301 and a memory 303, and optionally, the design device 300 of the tunnel steel frame may further include a communication interface 302.

It will be appreciated that the memory 303 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical disk, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory (DRmb Access), and Random Access Memory (DRAM). The memory 303 described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The method disclosed in the above embodiments of the present invention may be applied to the processor 301, or implemented by the processor 301. The processor 301 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 301. The Processor 301 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. Processor 301 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 303, and the processor 301 reads the information in the memory 303 and performs the steps of the aforementioned methods in conjunction with its hardware.

In an exemplary embodiment, the design Device of the tunnel steel frame may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the foregoing methods.

In the embodiments provided in the present invention, it should be understood that the disclosed method and apparatus can be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another observation, or some features may be omitted, or not performed. In addition, the communication connections between the components shown or discussed may be through interfaces, indirect couplings or communication connections of devices or units, and may be electrical, mechanical or other.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read-Only Memory (ROM), a magnetic disk, or an optical disk.

Alternatively, the integrated unit according to the embodiment of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for enabling a design device of a tunnel steel frame (which may be a personal computer, a server, or a network device) to execute all or part of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.

The method, apparatus, and computer storage medium for determining the quality of a satellite observation described in the examples of the invention are illustrative only, and are not intended to be limiting, as long as the method, apparatus, and computer storage medium for determining the quality of a satellite observation are within the scope of the invention.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and all such changes or substitutions are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A design method of a tunnel steel frame is characterized by comprising the following steps:

2. The method according to claim 1, wherein the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the comparison result comprises:

3. The method according to claim 2, wherein the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the first determination result includes:

4. The method according to claim 1, wherein the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the comparison result comprises:

5. The method according to claim 4, wherein said obtaining a stressed configuration of the concrete layer comprises:

6. The method according to claim 5, wherein the determining whether a steel frame needs to be arranged in the process of establishing the tunnel to be built according to the stress form comprises:

7. The method according to claim 6, wherein the determining whether a steel frame needs to be set in the process of establishing the tunnel to be established based on the second determination result includes:

8. The method according to claim 3, wherein after determining that the steel frame is required to be arranged in the process of establishing the tunnel to be built, the method further comprises the following steps:

9. The method of claim 7, wherein after determining that a grid steel frame needs to be set during the establishment of the tunnel to be built, the method further comprises:

10. A design device of tunnel steelframe, its characterized in that, the device includes: an obtaining unit, a comparing unit and a determining unit, wherein:

11. The apparatus of claim 10, wherein the determining unit comprises: a first determining subunit and a judging subunit, wherein:

12. The apparatus according to claim 11, wherein the first determining subunit is further configured to determine that a steel frame is not required to be set in the tunnel to be built in the building process when the first determination result indicates that the first safety factor is greater than or equal to the preset first safety factor; determining that a steel frame needs to be arranged in the tunnel building process to be built under the condition that the first judgment result shows that the first safety factor is smaller than the preset first safety factor; the steel frame is a profile steel frame.

13. The apparatus of claim 10, wherein the determining unit further comprises: obtaining a subunit and a second determining subunit, wherein:

14. The apparatus of claim 13, wherein the obtaining subunit is further configured to determine bending moment and axial force values of the first cross section from a loaded structural model of the concrete layer; the first section is any section in the concrete layer; and determining the stress form of the concrete layer based on the bending moment and the axial force value.

15. The device according to claim 14, wherein the second determining subunit is further configured to determine that no steel frame is required to be arranged in the process of establishing the tunnel to be established, when the stress shape represents that the concrete layer is in a small eccentric stress state; under the condition that the stress form represents that the concrete layer is in a large eccentricity compression state, determining a second safety coefficient of the concrete layer according to the bending moment and the axial force value; judging whether the second safety factor is greater than or equal to a preset second safety factor or not, and obtaining a second judgment result; and determining whether a steel frame needs to be set in the process of establishing the tunnel to be established or not based on the second judgment result.

16. The apparatus according to claim 15, wherein the second determining subunit is further configured to determine that a steel frame is not required to be set in the tunnel to be built in the building process, when the second determination result indicates that the second safety factor is greater than or equal to the preset second safety factor; determining that a steel frame needs to be arranged in the tunnel building process to be built under the condition that the second judgment result shows that the second safety factor is smaller than the preset second safety factor; the type of the steel frame is a grid steel frame.

17. The apparatus of claim 12, further comprising a first adjustment unit,

18. The apparatus according to claim 16, characterized in that the apparatus further comprises a second adjustment unit,

19. A tunnel steel frame design device, comprising a memory and a processor, wherein the memory stores a computer program capable of running on the processor, and the processor executes the program to implement the steps of the method of any one of claims 1 to 9.

20. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 9.