A method and device for evaluating a close-fit pipe jacking structure, an electronic device and a storage medium

Abstract

The application relates to the technical field of underground engineering and the technical field of software, and discloses a closely attached pipe jacking structure evaluation method and device, an electronic device and a storage medium, the method comprising the following steps: obtaining the assembly parameters of each closely attached ring from simulation construction data, selecting closely attached rings with assembly parameters satisfying a performance reduction condition as performance reduction closely attached rings, and selecting closely attached rings with assembly parameters not satisfying the performance reduction condition as performance normal closely attached rings; generating the total bearing capacity of the closely attached pipe jacking structure according to the number of the performance reduction closely attached rings, the performance reduction percentage of each performance reduction closely attached ring, the structural bending resistance of the performance normal closely attached rings and the number of the performance normal closely attached rings; and generating the performance evaluation value of the closely attached pipe jacking structure according to the total greenhouse gas emission amount of the closely attached pipe jacking structure, the preset structural safety redundancy, the total bearing capacity of the closely attached pipe jacking structure and a performance evaluation model. The application can improve the evaluation efficiency of the closely attached pipe jacking structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground engineering and the technical field of software, and in particular relates to a close-fit pipe jacking structure evaluation method and device, an electronic device and a storage medium. BACKGROUND

[0002] The urbanization process increases the urgent demand for the development and utilization of underground space in bustling areas, forcing the cross-sectional size of underground structures to increase continuously. When a large cross-section rectangular pipe jacking is used to construct the large cross-section underground structure, the soil above the pipe jacking is easily moved together with the pipe jacking machine and the pipe jacking under various actions, thereby significantly increasing the construction safety risk of the structure due to ground disturbance. In this regard, multi-hole pipe jacking close-fit construction has gradually emerged, which avoids the troubles brought by the construction of large cross-section size structures and greatly reduces the construction safety risk of large cross-section underground structures in bustling urban areas through the close assembly of multiple prefabricated components to form a spatial structure system.

[0003] However, underground close-fit pipe jacking structures are difficult to be sealed perfectly, and during the construction process, it is inevitable that centimeter-level construction gaps will appear, which have a crucial impact on the overall structural performance. However, existing research lacks suitable mechanical models for performance evaluation. At the same time, the mechanical performance of the structure is closely related to the cross-sectional size of the structure, and for foundation structures, increasing the cross-sectional size undoubtedly increases the use of materials and reduces the operation efficiency of the industrial chain. Under the condition of meeting the minimum mechanical bearing performance requirements, there are various structural design schemes, and different schemes have different greenhouse gas emissions due to different structural sizes. The existing close-fit pipe jacking structure evaluation method is limited to manual evaluation, and the manual evaluation method consumes a large amount of human and time resources, increases the time for obtaining the performance evaluation value of the close-fit pipe jacking structure, and is not conducive to improving the efficiency of obtaining the performance evaluation value of the close-fit pipe jacking structure. Therefore, how to obtain the performance evaluation value of the close-fit pipe jacking structure is a technical problem that needs to be solved. SUMMARY

[0004] The embodiments of the present application provide a close-fit pipe jacking structure evaluation method and device, an electronic device and a storage medium to solve the technical problem of how to obtain the performance evaluation value of the close-fit pipe jacking structure.

[0005] In a first aspect, the embodiments of the present application provide a close-fit pipe jacking structure evaluation method applied to an electronic device, and the close-fit pipe jacking structure evaluation method comprises:

[0006] obtaining simulation construction data of the close-fit pipe jacking structure from a simulation platform, the close-fit pipe jacking structure comprising a plurality of close-fit rings, and the close-fit ring being a connecting ring between adjacent pipe sections;

[0007] The assembly parameters of each close-fitting ring are obtained from the simulation construction data, a close-fitting ring with assembly parameters satisfying a performance reduction condition is selected as a performance reduction close-fitting ring, and a close-fitting ring with assembly parameters not satisfying the performance reduction condition is selected as a performance normal close-fitting ring, the performance reduction condition is one of that a horizontal distance in the assembly parameters is greater than a preset first distance, a vertical distance in the assembly parameters is greater than a preset second distance, and a structure corner in the assembly parameters is greater than a preset corner threshold, the performance reduction close-fitting ring is a close-fitting ring that reduces the performance of the close-fitting pipe jacking structure, and the performance normal close-fitting ring is a close-fitting ring that does not reduce the performance of the close-fitting pipe jacking structure;

[0008] The total bearing capacity of the close-fitting pipe jacking structure is generated according to the number of the performance reduction close-fitting rings, the performance reduction percentage of each performance reduction close-fitting ring, the structural bending resistance of the performance normal close-fitting ring, the number of the performance normal close-fitting rings, and the total bearing capacity model;

[0009] The total greenhouse gas emission of the close-fitting pipe jacking structure is obtained by adding the greenhouse gas emission in the production stage, the greenhouse gas emission in the transportation stage, and the greenhouse gas emission in the construction stage of the close-fitting pipe jacking structure;

[0010] The performance evaluation value of the close-fitting pipe jacking structure is generated according to the total greenhouse gas emission of the close-fitting pipe jacking structure, a preset structural safety redundancy, the total bearing capacity of the close-fitting pipe jacking structure, and a performance evaluation model.

[0011] In a possible implementation manner of the first aspect, the simulation construction data of the close-fitting pipe jacking structure is obtained from the simulation platform, and the simulation construction data of the close-fitting pipe jacking structure is obtained from the simulation platform.

[0012] The model of the close-fitting pipe jacking structure is imported into the simulation platform, and the simulation construction data of the close-fitting pipe jacking structure is obtained from an output file in the simulation platform after a simulation success completion message returned by the simulation platform is received.

[0013] In a possible implementation manner of the first aspect, the total greenhouse gas emission of the close-fitting pipe jacking structure is obtained by adding the greenhouse gas emission in the production stage, the greenhouse gas emission in the transportation stage, and the greenhouse gas emission in the construction stage of the close-fitting pipe jacking structure, and the total greenhouse gas emission of the close-fitting pipe jacking structure includes:

[0014] The greenhouse gas emission in the production stage of the close-fitting pipe jacking structure is generated according to the consumption of each material in the production stage, the greenhouse gas emission factor of each material, and a first emission model;

[0015] The greenhouse gas emission in the transportation stage of the close-fitting pipe jacking structure is generated according to the transportation distance of each building material, the transportation weight of each building material, and a second emission model.

[0016] generate the greenhouse gas emission amount of the close-fit pipe structure in the construction stage according to the energy consumption of the machinery used by each building material in the construction stage of the close-fit pipe structure, the energy consumption of the pipe jacking machine used in the construction stage of the close-fit pipe structure, the greenhouse gas emission factor of the pipe jacking machine, the transportation distance of the muck in the construction stage of the close-fit pipe structure, the transportation weight of the muck, the greenhouse gas emission factor of the muck transportation vehicle, and the third emission model;

[0017] add the greenhouse gas emission amount of the close-fit pipe structure in the production stage, the greenhouse gas emission amount of the close-fit pipe structure in the transportation stage, and the greenhouse gas emission amount of the close-fit pipe structure in the construction stage by using the total emission model to obtain the total greenhouse gas emission amount of the close-fit pipe structure.

[0018] In a possible implementation manner of the first aspect, the performance evaluation value of the close-fit pipe structure is generated according to the total greenhouse gas emission amount of the close-fit pipe structure, the preset structural safety redundancy, the total carrying capacity of the close-fit pipe structure, and the performance evaluation model, and the performance evaluation model includes:

[0019] obtaining the design file, and obtaining the preset structural safety redundancy from the design file;

[0020] generating the performance evaluation value of the close-fit pipe structure according to the total greenhouse gas emission amount of the close-fit pipe structure, the preset structural safety redundancy, the total carrying capacity of the close-fit pipe structure, and the performance evaluation model.

[0021] In a possible implementation manner of the first aspect, the total carrying capacity model is:

[0022] ;

[0023] wherein, the total carrying capacity of the close-fit pipe structure is represented by C;

[0024] the number of performance-reducing close-fit rings is represented by N;

[0025] the performance reduction percentage of the ith performance-reducing close-fit ring is represented by P;

[0026] the bending resistance carrying capacity of the performance-normal close-fit ring is represented by R;

[0027] the number of performance-normal close-fit rings is represented by N.

[0028] In a possible implementation manner of the first aspect, the first emission model is:

[0029] ;

[0030] This indicates the greenhouse gas emissions of the close-fitting pipe jacking structure during the production phase;

[0031] Indicates the material serial number. Indicates the total number of material types;

[0032] This indicates the first stage of the production process for the closely fitted pipe jacking structure. Consumption of this type of material;

[0033] Indicates the first Greenhouse gas emission factors of the materials;

[0034] Indicates the first The number of times a material can be recycled;

[0035] The second emission model is:

[0036] ;

[0037] This indicates the greenhouse gas emissions of the close-fitting pipe jacking structure during the transportation phase;

[0038] Indicates the building material serial number. Indicates the total number of building material types;

[0039] This indicates the first stage of the transportation phase of the close-fitting pipe jacking structure. The transportation distance of various building materials; Indicates the first The transport weight of various building materials;

[0040] Indicates the first Greenhouse gas emissions from vehicles transporting building materials;

[0041] The third emission model is:

[0042] ;

[0043] This indicates the greenhouse gas emissions of the close-fitting pipe jacking structure during the construction phase;

[0044] This indicates the first stage of the construction of the close-fitting pipe jacking structure. The energy consumed by the machinery used in the construction of these building materials;

[0045] Indicates the first Greenhouse gas emissions from machinery used in the assembly of building materials;

[0046] This indicates the energy consumed by the pipe jacking machine used in the construction phase of the close-fitting pipe jacking structure;

[0047] Indicates the greenhouse gas emission factor of the pipe jacking machine;

[0048] This indicates the distance for transporting excavated soil during the construction phase of a close-fitting pipe jacking structure.

[0049] Indicates the transport weight of the construction waste; This indicates the greenhouse gas emission factor of vehicles transporting construction waste.

[0050] The total emissions model is as follows:

[0051] ;

[0052] in, This indicates the total greenhouse gas emissions from a tightly fitted pipe structure;

[0053] This indicates the greenhouse gas emissions of the close-fitting pipe jacking structure during the production phase;

[0054] This indicates the greenhouse gas emissions of the close-fitting pipe jacking structure during the transportation phase;

[0055] This indicates the greenhouse gas emissions of the close-fitting pipe jacking structure during the construction phase.

[0056] In one possible implementation of the first aspect, the performance evaluation model is as follows:

[0057] ;

[0058] This indicates the performance evaluation value of the close-fitting pipe jacking structure. This indicates the total bearing capacity of the closely spaced pipe jacking structure. This indicates the preset structural safety redundancy; This indicates the total greenhouse gas emissions from a tightly fitted pipe jacking structure.

[0059] Secondly, embodiments of this application provide a close-fitting jacking pipe structure evaluation device, applied to electronic equipment, comprising:

[0060] The first acquisition module is used to acquire simulated construction data of the close-fitting pipe jacking structure from the simulation platform. The close-fitting pipe jacking structure includes multiple close-fitting rings, which are connecting rings between adjacent pipe sections.

[0061] The second obtaining module is configured to obtain the assembly parameters of each close-fit ring from the simulated construction data, select a close-fit ring with assembly parameters satisfying a performance reduction condition as a performance reduction close-fit ring, and select a close-fit ring with assembly parameters not satisfying the performance reduction condition as a performance normal close-fit ring. The performance reduction condition is one of the horizontal distance in the assembly parameters being greater than a preset first distance, the vertical distance in the assembly parameters being greater than a preset second distance, and the structure corner in the assembly parameters being greater than a preset corner threshold. The performance reduction close-fit ring is a close-fit ring that reduces the performance of the close-fit pipe jacking structure. The performance normal close-fit ring is a close-fit ring that does not reduce the performance of the close-fit pipe jacking structure.

[0062] The generating module is configured to generate the total bearing capacity of the close-fit pipe jacking structure according to the number of performance reduction close-fit rings, the performance reduction percentage of each performance reduction close-fit ring, the structural bending resistance of the performance normal close-fit ring, the number of performance normal close-fit rings, and a total bearing capacity model.

[0063] The adding module is configured to add the greenhouse gas emission amount of the close-fit pipe jacking structure in the production stage, the greenhouse gas emission amount of the close-fit pipe jacking structure in the transportation stage, and the greenhouse gas emission amount of the close-fit pipe jacking structure in the construction stage, to obtain the total greenhouse gas emission amount of the close-fit pipe jacking structure.

[0064] The evaluation module is configured to generate the performance evaluation value of the close-fit pipe jacking structure according to the total greenhouse gas emission amount of the close-fit pipe jacking structure, a preset structural safety redundancy, the total bearing capacity of the close-fit pipe jacking structure, and a performance evaluation model.

[0065] In a third aspect, an electronic device is provided, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor. The processor implements the close-fit pipe jacking structure evaluation method in the first aspect when executing the computer program.

[0066] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the close-fit pipe jacking structure evaluation method in the first aspect.

[0067] In a fifth aspect, a computer program product is provided. When the computer program product is run on an electronic device, the electronic device executes the close-fit pipe jacking structure evaluation method in the first aspect.

[0068] The embodiments of the present application have two advantages. On the one hand, according to the total greenhouse gas emission of the close-to-pipe structure, the preset structural safety redundancy, the total bearing capacity of the close-to-pipe structure and the performance evaluation model, the performance evaluation value of the close-to-pipe structure is generated. Since the performance evaluation value of the close-to-pipe structure does not need to be evaluated manually, the acquisition time of the performance evaluation value of the close-to-pipe structure is reduced, and the acquisition efficiency of the performance evaluation value of the close-to-pipe structure is improved, thereby solving the problem of how to acquire the performance evaluation value of the close-to-pipe structure. On the other hand, the greater the performance evaluation value of the close-to-pipe structure, the less the greenhouse gas emission released by the close-to-pipe structure under the premise of achieving the same total bearing capacity, which means that the close-to-pipe structure has better comprehensive evaluation in terms of structure performance and environmental benefits. The smaller the performance evaluation value of the close-to-pipe structure, the more the greenhouse gas emission released by the close-to-pipe structure under the premise of achieving the same total bearing capacity, which means that the close-to-pipe structure has worse comprehensive evaluation in terms of structure performance and environmental benefits. BRIEF DESCRIPTION OF DRAWINGS

[0069] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0070] Figure 1 The application scenario diagram of the close-to-pipe structure evaluation method provided by the embodiments of the present application is shown.

[0071] Figure 2 The flowchart of the close-to-pipe structure evaluation method provided by the embodiments of the present application is shown.

[0072] Figure 3 The flowchart of S205 provided by the embodiments of the present application is shown.

[0073] Figure 4 The schematic block diagram of the close-to-pipe structure evaluation device provided by the embodiments of the present application is shown.

[0074] Figure 5 The structural schematic diagram of the electronic device provided by the embodiments of the present application is shown. DETAILED DESCRIPTION

[0075] In order to make the purposes, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application and not to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0076] The close-fit pipe jacking structure evaluation method provided by the embodiments of the present application can be applied to servers, mobile phones, tablet computers, wearable devices, vehicle-mounted devices, augmented reality (AR) / virtual reality (VR) devices, notebook computers, ultra-mobile personal computers (UMPCs), netbooks, personal digital assistants (PDAs), and the like. The embodiments of the present application do not limit the specific type of electronic device.

[0077] Please refer to Figure 1 , Figure 1 The application scenario diagram of the close-fit pipe jacking structure evaluation method provided by the embodiments of the present application is described as follows.

[0078] The electronic device accesses the simulation platform and obtains simulation construction data of the close-fit pipe jacking structure from the simulation platform.

[0079] The simulation platform is a comprehensive system integrating hardware resources, software tools, algorithm models, and interactive functions. The core role is to simulate the operation process of physical entities, engineering systems, or natural phenomena in the real world through digital means, thereby replacing or assisting real experiments.

[0080] The construction of the close-fit pipe jacking structure involves multivariate coupling of stratum disturbance, pipe joint stress, mud balance, and the like. The simulation platform can quantitatively analyze the soil deformation law under different geological conditions, identify risks such as ground subsidence overrun and pipe joint deviation in advance, and provide a scientific basis for optimization of the close-fit pipe jacking structure.

[0081] In the embodiments of the present application, the electronic device can access the simulation platform and obtain simulation construction data of the close-fit pipe jacking structure from the simulation platform.

[0082] Please refer to Figure 2 , Figure 2 The flowchart of the close-fit pipe jacking structure evaluation method provided by the embodiments of the present application is shown in FIG. 5. The method can be applied to an electronic device.

[0083] As Figure 2As shown, the evaluation method for the close-fit pipe jacking structure provided by the embodiments of the present application includes the following steps, which are described in detail as follows.

[0084] S201, obtaining simulation construction data of a close-fit pipe jacking structure from a simulation platform, the close-fit pipe jacking structure including a plurality of close-fit rings, the close-fit ring being a connecting ring between adjacent pipe sections;

[0085] The close-fit pipe jacking structure includes but is not limited to a two-hole close-fit pipe jacking structure and a three-hole close-fit pipe jacking structure.

[0086] The close-fit pipe jacking structure refers to a structure in which prefabricated pipe sections are pushed into the soil by a pipe jacking machine, and a high-precision contact surface design and synchronous grouting process are used to form a close-fit state between the pipe sections and the surrounding soil, so that the pipe sections, the grouting body and the soil form a composite structure for load bearing. The close-fit pipe jacking structure optimizes the mechanical properties of the pipe-soil interface to achieve stability control during construction and operation.

[0087] The simulation construction data of the close-fit pipe jacking structure obtained from the simulation platform includes:

[0088] Accessing the simulation platform, importing the model of the close-fit pipe jacking structure into the simulation platform, and obtaining the simulation construction data of the close-fit pipe jacking structure from the output file in the simulation platform after receiving the simulation success completion message returned by the simulation platform.

[0089] S202, obtaining assembly parameters of each close-fit ring from the simulation construction data, selecting a close-fit ring with assembly parameters satisfying a performance reduction condition as a performance reduction close-fit ring, and selecting a close-fit ring with assembly parameters not satisfying the performance reduction condition as a performance normal close-fit ring, the performance reduction condition being one of the horizontal distance in the assembly parameters being greater than a preset first distance, the vertical distance in the assembly parameters being greater than a preset second distance, and the structural corner in the assembly parameters being greater than a preset corner threshold, the performance reduction close-fit ring being a close-fit ring that reduces the performance of the close-fit pipe jacking structure, and the performance normal close-fit ring being a close-fit ring that does not reduce the performance of the close-fit pipe jacking structure;

[0090] The assembly parameters of the close-fit ring affect the performance of the close-fit pipe jacking structure, because when the assembly parameters satisfy the performance reduction condition, the force transmission path of the close-fit pipe jacking structure becomes longer and more complex, and the force originally transmitted directly through the close-fit ring may need to be transmitted indirectly through other components or media, which causes the force to be lost and dispersed during transmission, resulting in uneven stress distribution in each part of the close-fit pipe jacking structure and thus reducing the performance of the close-fit pipe jacking structure.

[0091] The assembly parameters of the close-fit ring include the horizontal distance of the close-fit ring, the vertical distance of the close-fit ring, and the structural corner of the close-fit ring.

[0092] For the convenience of illustration, the following examples are given:

[0093] For example, there are 5 close-fitting rings, which are close-fitting ring 1, close-fitting ring 2, close-fitting ring 3, close-fitting ring 4, and close-fitting ring 5.

[0094] The assembly parameters of the close-fitting ring 1 include the horizontal distance of the close-fitting ring 1, the vertical distance of the close-fitting ring 1, and the structure corner of the close-fitting ring 1. The horizontal distance of the close-fitting ring 1 is greater than the preset first distance, and the close-fitting ring 1 is a performance-reduced close-fitting ring.

[0095] The assembly parameters of the close-fitting ring 2 include the horizontal distance of the close-fitting ring 2, the vertical distance of the close-fitting ring 2, and the structure corner of the close-fitting ring 2. The vertical distance of the close-fitting ring 2 is greater than the preset second distance, and the close-fitting ring 2 is a performance-reduced close-fitting ring.

[0096] The assembly parameters of the close-fitting ring 3 include the horizontal distance of the close-fitting ring 3, the vertical distance of the close-fitting ring 3, and the structure corner of the close-fitting ring 3. The structure corner of the close-fitting ring 3 is greater than the preset corner threshold, and the close-fitting ring 3 is a performance-reduced close-fitting ring.

[0097] The assembly parameters of the close-fitting ring 4 include the horizontal distance of the close-fitting ring 4, the vertical distance of the close-fitting ring 4, and the structure corner of the close-fitting ring 4. The horizontal distance of the close-fitting ring 4 is not greater than the preset first distance, the vertical distance of the close-fitting ring 4 is not greater than the preset second distance, and the structure corner of the close-fitting ring 4 is not greater than the preset corner threshold. The close-fitting ring 4 is a performance-normal close-fitting ring.

[0098] The assembly parameters of the close-fitting ring 5 include the horizontal distance of the close-fitting ring 5, the vertical distance of the close-fitting ring 5, and the structure corner of the close-fitting ring 5. The horizontal distance of the close-fitting ring 5 is not greater than the preset first distance, the vertical distance of the close-fitting ring 5 is not greater than the preset second distance, and the structure corner of the close-fitting ring 5 is not greater than the preset corner threshold. The close-fitting ring 5 is a performance-normal close-fitting ring.

[0099] S203, according to the number of performance-reduced close-fitting rings, the performance reduction percentage of each performance-reduced close-fitting ring, the structure bending resistance of the performance-normal close-fitting ring, the number of performance-normal close-fitting rings, and the total bearing capacity model, generating the total bearing capacity of the close-fitting pipe structure.

[0100] wherein the total bearing capacity model is:

[0101] ;

[0102] wherein, represents the total bearing capacity of the close-fitting pipe structure.

[0103] represents the number of performance-reduced close-fitting rings.

[0104] represents the performance reduction percentage of the i-th performance-reduced close-fitting ring.

[0105] represents the bending resistance of the normal performance gasket ring;

[0106] represents the number of gasket rings with normal performance.

[0107] S204, adding the greenhouse gas emission in the production stage of the gasket pipe structure, the greenhouse gas emission in the transportation stage of the gasket pipe structure, and the greenhouse gas emission in the construction stage of the gasket pipe structure to obtain the total greenhouse gas emission of the gasket pipe structure;

[0108] The adding the greenhouse gas emission in the production stage of the gasket pipe structure, the greenhouse gas emission in the transportation stage of the gasket pipe structure, and the greenhouse gas emission in the construction stage of the gasket pipe structure to obtain the total greenhouse gas emission of the gasket pipe structure comprises:

[0109] According to the consumption of each material in the production stage of the gasket pipe structure, the greenhouse gas emission factor of each material, and the first emission model, the greenhouse gas emission in the production stage of the gasket pipe structure is generated.

[0110] According to the transportation distance of each building material in the transportation stage of the gasket pipe structure, the transportation weight of each building material, and the second emission model, the greenhouse gas emission in the transportation stage of the gasket pipe structure is generated.

[0111] According to the consumption energy of the machinery used in the construction stage of the gasket pipe structure, the consumption energy of the pipe jacking machine used in the construction stage of the gasket pipe structure, the greenhouse gas emission factor of the pipe jacking machine, the transportation distance of the muck in the construction stage of the gasket pipe structure, the transportation weight of the muck, the greenhouse gas emission factor of the muck transportation vehicle, and the third emission model, the greenhouse gas emission in the construction stage of the gasket pipe structure is generated.

[0112] The adding the greenhouse gas emission in the production stage of the gasket pipe structure, the greenhouse gas emission in the transportation stage of the gasket pipe structure, and the greenhouse gas emission in the construction stage of the gasket pipe structure to obtain the total greenhouse gas emission of the gasket pipe structure adopts the total emission model.

[0113] The first emission model is:

[0114] ;

[0115] represents the greenhouse gas emission in the production stage of the gasket pipe structure;

[0116] represents the material serial number, Total number of material types;

[0117] Consumption of the nth material in the production phase of the close-fit pipe jacking structure;

[0118] Greenhouse gas emission factor of the nth material;

[0119] Recycling times of the nth material;

[0120] The second emission model is:

[0121] ;

[0122] Greenhouse gas emissions of the close-fit pipe jacking structure in the transportation phase;

[0123] Build material serial number, Total number of build material types;

[0124] Transportation distance of the nth build material in the transportation phase of the close-fit pipe jacking structure; Transportation weight of the nth build material;

[0125] Greenhouse gas emission factor of the transportation vehicle of the nth build material; The third emission model is:

[0126]

[0127] ;

[0128] Greenhouse gas emissions of the close-fit pipe jacking structure in the construction phase;

[0129] Consumption energy of the machinery used by the nth build material in the construction phase of the close-fit pipe jacking structure; Greenhouse gas emission factor of the machinery used by the nth build material in the assembly process;

[0130] Consumption energy of the pipe jacking machine used in the construction phase of the close-fit pipe jacking structure;

[0131] Greenhouse gas emissions of the close-fit pipe jacking structure in the construction phase;

[0132] ​​​​​​​ represents the greenhouse gas emission factor of the pipe jacking machine;

[0133] represents the transportation distance of the muck in the construction stage of the close-fit pipe jacking structure;

[0134] represents the transportation weight of the muck; represents the greenhouse gas emission factor of the muck transportation vehicle;

[0135] wherein the total emission model is:

[0136]

[0137] wherein, represents the total greenhouse gas emission of the close-fit pipe jacking structure;

[0138] represents the greenhouse gas emission in the production stage of the close-fit pipe jacking structure;

[0139] represents the greenhouse gas emission in the transportation stage of the close-fit pipe jacking structure;

[0140] represents the greenhouse gas emission in the construction stage of the close-fit pipe jacking structure.

[0141] wherein, in the construction stage of the close-fit pipe jacking structure, the application of the pipe jacking machine is the key guarantee to achieve the core goal of the project. The close-fit pipe jacking has very high requirements for the connection of pipe sections, which needs to ensure that there is no gap between pipe sections to avoid leakage or structural deformation in the later stage. The precise guidance system equipped in the pipe jacking machine can adjust the pushing direction and force in real time to avoid the deviation of pipe sections due to uneven stress during the jacking process, and ensure the precise butt joint of pipe sections along the designed axis, which fundamentally guarantees the close-fit effect of the close-fit pipe jacking structure.

[0142] In addition, in the construction stage of the close-fit pipe jacking structure, the cutter head of the pipe jacking machine cuts the front stratum, and then the pipe sections are jacked into the excavation space one by one. During this process, the continuous cutting of the cutter head on the soil will produce muck. If the muck is not discharged from the pipe in time, the space inside the pipe will be filled with muck, and the subsequent pipe sections cannot be jacked in. Therefore, the transportation of muck is the premise of ensuring the continuous construction, and the transportation of muck can strengthen the stability of the close-fit pipe jacking structure during construction.

[0143] S205, generating a performance evaluation value of the close-fit pipe jacking structure according to the total greenhouse gas emission of the close-fit pipe jacking structure, the preset structural safety redundancy, the total bearing capacity of the close-fit pipe jacking structure, and the performance evaluation model.

[0144] wherein, the performance evaluation model is: ​

[0145] ;

[0146] a performance evaluation value of the close-fit pipe jacking structure, a total load bearing capacity of the close-fit pipe jacking structure, a preset structural safety redundancy; a total greenhouse gas emission of the close-fit pipe jacking structure.

[0147] The total load bearing capacity of the close-fit pipe jacking structure minus the structural safety redundancy, and then divided by the total greenhouse gas emission of the close-fit pipe jacking structure, can associate the total load bearing capacity with the total greenhouse gas emission. If the performance evaluation value is positive, and the greater the performance evaluation value, the less greenhouse gas emission released by the close-fit pipe jacking structure under the premise of achieving the same total load bearing capacity, which means that the close-fit pipe jacking structure has better comprehensive evaluation in terms of structure performance and environmental benefits. If the performance evaluation value is positive, and the smaller the performance evaluation value of the close-fit pipe jacking structure, the more greenhouse gas emission released by the close-fit pipe jacking structure under the premise of achieving the same total load bearing capacity, which means that the close-fit pipe jacking structure has worse comprehensive evaluation in terms of structure performance and environmental benefits.

[0148] Exemplarily, after generating the performance evaluation value of the close-fit pipe jacking structure according to the total greenhouse gas emission of the close-fit pipe jacking structure, the preset structural safety redundancy, the total load bearing capacity of the close-fit pipe jacking structure, and the performance evaluation model, the close-fit pipe jacking structure evaluation method comprises:

[0149] When the performance evaluation value of the close-fit pipe jacking structure is greater than the preset evaluation value, the construction scheme of the close-fit pipe jacking structure is selected as the target scheme.

[0150] When the performance evaluation value of the close-fit pipe jacking structure is greater than the preset evaluation value, the design scheme of the close-fit pipe jacking structure is selected as the target scheme, and the construction scheme of the close-fit pipe jacking structure is ensured to meet the requirements of structural safety and environmental protection at the same time.

[0151] The embodiments of the present application have two advantages. On the one hand, according to the total greenhouse gas emission of the close-fit pipe structure, the preset structural safety redundancy, the total bearing capacity of the close-fit pipe structure, and the performance evaluation model, the performance evaluation value of the close-fit pipe structure is generated. Since the performance evaluation value of the close-fit pipe structure does not need to be evaluated manually, the acquisition time of the performance evaluation value of the close-fit pipe structure is reduced, and the acquisition efficiency of the performance evaluation value of the close-fit pipe structure is improved, thereby solving the problem of how to acquire the performance evaluation value of the close-fit pipe structure. On the other hand, the greater the performance evaluation value of the close-fit pipe structure, the less the greenhouse gas emission released by the close-fit pipe structure under the premise of achieving the same total bearing capacity, which means that the close-fit pipe structure has better comprehensive evaluation in terms of structure performance and environmental benefits. The smaller the performance evaluation value of the close-fit pipe structure, the more the greenhouse gas emission released by the close-fit pipe structure under the premise of achieving the same total bearing capacity, which means that the close-fit pipe structure has worse comprehensive evaluation in terms of structure performance and environmental benefits.

[0152] Please refer to Figure 3 , Figure 3 The flowchart of S205 provided by the embodiments of the present application is described in detail as follows.

[0153] S301, acquiring a design file, and obtaining the preset structural safety redundancy from the design file.

[0154] S302, generating the performance evaluation value of the close-fit pipe structure according to the total greenhouse gas emission of the close-fit pipe structure, the preset structural safety redundancy, the total bearing capacity of the close-fit pipe structure, and the performance evaluation model.

[0155] In the embodiments of the present application, the performance evaluation value of the close-fit pipe structure is automatically generated through the performance evaluation model, which is not subject to human intervention and can improve the reliability of the performance evaluation value of the close-fit pipe structure.

[0156] Corresponding to the close-fit pipe structure evaluation method described in the above embodiments, please refer to Figure 4 , Figure 4 The schematic block diagram of the close-fit pipe structure evaluation device provided by the embodiments of the present application is shown in Figure 4 The close-fit pipe structure evaluation device 400 shown in Figure 1 may be applied to an electronic device in an application scenario as shown in Figure 4 The close-fit pipe structure evaluation device 400 is described in detail below taking the electronic device as an example. The close-fit pipe structure evaluation device 400 can include a first acquisition module 401, a second acquisition module 402, a generation module 403, an addition module 404, and an evaluation module 405.

[0157] The first obtaining module 401 is configured to obtain simulation construction data of a close-fit pipe jacking structure from a simulation platform, the close-fit pipe jacking structure comprising a plurality of close-fit rings, and the close-fit ring being a connecting ring between adjacent pipe sections;

[0158] The second obtaining module 402 is configured to obtain assembly parameters of each close-fit ring from the simulation construction data, select a close-fit ring with assembly parameters satisfying a performance reduction condition as a performance reduction close-fit ring, and select a close-fit ring with assembly parameters not satisfying the performance reduction condition as a performance normal close-fit ring, wherein the performance reduction condition is one of a horizontal distance in the assembly parameters being greater than a preset first distance, a vertical distance in the assembly parameters being greater than a preset second distance, and a structure corner in the assembly parameters being greater than a preset corner threshold value, the performance reduction close-fit ring being a close-fit ring that reduces the performance of the close-fit pipe jacking structure, and the performance normal close-fit ring being a close-fit ring that does not reduce the performance of the close-fit pipe jacking structure;

[0159] The generating module 403 is configured to generate a total bearing capacity of the close-fit pipe jacking structure according to the number of the performance reduction close-fit rings, the performance reduction percentage of each performance reduction close-fit ring, the structure bending resistance of the performance normal close-fit ring, the number of the performance normal close-fit rings, and a total bearing capacity model.

[0160] The adding module 404 is configured to add a greenhouse gas emission amount of the close-fit pipe jacking structure in a production stage, a greenhouse gas emission amount of the close-fit pipe jacking structure in a transportation stage, and a greenhouse gas emission amount of the close-fit pipe jacking structure in a construction stage, to obtain a total greenhouse gas emission amount of the close-fit pipe jacking structure.

[0161] The evaluation module 405 is configured to generate a performance evaluation value of the close-fit pipe jacking structure according to the total greenhouse gas emission amount of the close-fit pipe jacking structure, a preset structure safety redundancy, the total bearing capacity of the close-fit pipe jacking structure, and a performance evaluation model.

[0162] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other.

[0163] The embodiments of the present application have two advantages. On the one hand, according to the total greenhouse gas emission of the close-fit pipe structure, the preset structural safety redundancy, the total bearing capacity of the close-fit pipe structure, and the performance evaluation model, the performance evaluation value of the close-fit pipe structure is generated. Since the performance evaluation value of the close-fit pipe structure does not need to be evaluated manually, the acquisition time of the performance evaluation value of the close-fit pipe structure is reduced, and the acquisition efficiency of the performance evaluation value of the close-fit pipe structure is improved. Therefore, the problem of how to acquire the performance evaluation value of the close-fit pipe structure is solved. On the other hand, the larger the performance evaluation value of the close-fit pipe structure is, the less greenhouse gas emission is released by the close-fit pipe structure under the premise of achieving the same total bearing capacity, which means that the close-fit pipe structure has better comprehensive evaluation in terms of structure performance and environmental benefits. The smaller the performance evaluation value of the close-fit pipe structure is, the more greenhouse gas emission is released by the close-fit pipe structure under the premise of achieving the same total bearing capacity, which means that the close-fit pipe structure has worse comprehensive evaluation in terms of structure performance and environmental benefits.

[0164] Please refer to Figure 5 , Figure 5 The structural schematic diagram of the electronic device provided by the embodiments of the present application is shown.

[0165] As Figure 5 shown, Figure 5 The electronic device 2 comprises at least one processor 20, a memory 21, and a computer program 22 stored in the memory 21 and executable on the at least one processor 20, wherein the processor 20 implements the steps in any of the above method embodiments when executing the computer program 22.

[0166] The electronic device 2 can include, but is not limited to, the processor 20 and the memory 21. Those skilled in the art can understand that Figure 5 The electronic device 2 is only an example and does not constitute a limitation on the electronic device 2, and can include more or fewer components than shown, or combine certain components, or different components, for example, can also include input / output devices, network access devices, etc.

[0167] The processor 20 is configured to run the computer program 22 stored in the memory 21, and implement the following steps when executing the computer program 22:

[0168] The simulation construction data of the close-fit pipe structure is acquired from the simulation platform. The close-fit pipe structure comprises a plurality of close-fit rings, and the close-fit ring is a connecting ring between adjacent pipe sections;

[0169] The assembly parameters of each close-fitting ring are obtained from the simulated construction data, the close-fitting ring with the assembly parameters meeting the performance reduction condition is selected as the performance reduction close-fitting ring, and the close-fitting ring with the assembly parameters not meeting the performance reduction condition is selected as the performance normal close-fitting ring, the performance reduction condition is one of that the horizontal distance in the assembly parameters is greater than a preset first distance, the vertical distance in the assembly parameters is greater than a preset second distance, and the structure corner in the assembly parameters is greater than a preset corner threshold, the performance reduction close-fitting ring is the close-fitting ring that reduces the performance of the close-fitting pipe jacking structure, and the performance normal close-fitting ring is the close-fitting ring that does not reduce the performance of the close-fitting pipe jacking structure;

[0170] According to the number of performance reduction close-fitting rings, the performance reduction percentage of each performance reduction close-fitting ring, the structural bending resistance of the performance normal close-fitting ring, the number of performance normal close-fitting rings, and the total bearing capacity model, the total bearing capacity of the close-fitting pipe jacking structure is generated.

[0171] The greenhouse gas emissions of the close-fitting pipe jacking structure in the production stage, the greenhouse gas emissions of the close-fitting pipe jacking structure in the transportation stage, and the greenhouse gas emissions of the close-fitting pipe jacking structure in the construction stage are added to obtain the total greenhouse gas emissions of the close-fitting pipe jacking structure.

[0172] According to the total greenhouse gas emissions of the close-fitting pipe jacking structure, the preset structural safety redundancy, the total bearing capacity of the close-fitting pipe jacking structure, and the performance evaluation model, the performance evaluation value of the close-fitting pipe jacking structure is generated.

[0173] The processor 20 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or can also be any conventional processor.

[0174] The memory 21 can be an internal storage unit of the electronic device 2 in some embodiments, such as a hard disk or a memory of the electronic device 2. The memory 21 can also be an external storage device of the electronic device 2 in other embodiments, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, and the like equipped on the electronic device 2. Further, the memory 21 can include both the internal storage unit and the external storage device of the electronic device 2.

[0175] It should be noted that the information interaction, execution process, and the like between the above-described apparatuses / units are based on the same concept as the method embodiments of the present application, and specific functions and technical effects brought by the same can be referred to the method embodiments part, which will not be described herein again.

[0176] The computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps in each of the above method embodiments.

[0177] The computer readable storage medium stores program code, and the program code can be called and executed by the processor to implement the method for evaluating the close-fit pipe jacking structure described in the above method embodiments.

[0178] The computer readable storage medium has storage space for the program code.

[0179] The program code includes the code of any step in the method for evaluating the close-fit pipe jacking structure described in the above method embodiments.

[0180] The specific implementation of each operation can be referred to the above embodiments, which will not be described herein again.

[0181] Since the computer program stored in the computer readable storage medium can execute any one of the methods for evaluating the close-fit pipe jacking structure provided by the embodiments of the present application, the computer readable storage medium can achieve the beneficial effects of any one of the methods for evaluating the close-fit pipe jacking structure provided by the embodiments of the present application, which can be referred to the above embodiments, which will not be described herein again.

[0182] The computer program product provided by the embodiments of the present application, when running on an electronic device, causes the electronic device to execute the above method for evaluating the close-fit pipe jacking structure.

[0183] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0184] The above merely preferred embodiments of the present application and are not intended to limit the patent scope of the present application, any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method of assessing a close-fit pipe jacking structure, characterized by, The method is applied to an electronic device, and the method for evaluating the close-fit pipe jacking structure comprises the following steps: Obtain simulation construction data of the close-fit pipe jacking structure from a simulation platform, wherein the close-fit pipe jacking structure comprises a plurality of close-fit rings, and the close-fit ring is a connecting ring between adjacent pipe sections; Obtain assembly parameters of each close-fit ring from the simulation construction data, select a close-fit ring with assembly parameters satisfying a performance reduction condition as a performance reduction close-fit ring, and select a close-fit ring with assembly parameters not satisfying the performance reduction condition as a performance normal close-fit ring, wherein the performance reduction condition is one of a horizontal distance in the assembly parameters being greater than a preset first distance, a vertical distance in the assembly parameters being greater than a preset second distance, and a structure corner in the assembly parameters being greater than a preset corner threshold value, the performance reduction close-fit ring is a close-fit ring that reduces the performance of the close-fit pipe jacking structure, and the performance normal close-fit ring is a close-fit ring that does not reduce the performance of the close-fit pipe jacking structure; Generate a total bearing capacity of the close-fit pipe jacking structure according to the number of the performance reduction close-fit rings, the performance reduction percentage of each performance reduction close-fit ring, the structural bending resistance of the performance normal close-fit ring, the number of the performance normal close-fit rings, and a total bearing capacity model; Add a greenhouse gas emission amount of the close-fit pipe jacking structure in a production stage, a greenhouse gas emission amount of the close-fit pipe jacking structure in a transportation stage, and a greenhouse gas emission amount of the close-fit pipe jacking structure in a construction stage to obtain a total greenhouse gas emission amount of the close-fit pipe jacking structure; Generate a performance evaluation value of the close-fit pipe jacking structure according to the total greenhouse gas emission amount of the close-fit pipe jacking structure, a preset structural safety redundancy, the total bearing capacity of the close-fit pipe jacking structure, and a performance evaluation model; The total bearing capacity model is: ； wherein, represents the total bearing capacity of the close-fit pipe structure; represents the number of performance-reducing close-fitting rings; Pi represents the percentage of performance reduction of the i-th performance-reducing gasket; Normal performance of the ring's bending resistance capacity; represents the number of normally performing close rings; The performance evaluation model is: ； a performance evaluation value representing the adherence pipe structure, a total load bearing capacity representing the adherence pipe structure, a preset structure safety redundancy; a total greenhouse gas emission representing the adherence pipe structure.

2. The method of assessing a close-fit pipe jacking structure according to claim 1, wherein The simulation platform obtains simulation construction data of the close-fit pipe jacking structure, comprising: Access the simulation platform, import a model of the close-fit pipe jacking structure into the simulation platform, and obtain the simulation construction data of the close-fit pipe jacking structure from an output file in the simulation platform after receiving a simulation success completion message returned by the simulation platform.

3. The method of assessing a close-fit pipe jacking structure according to claim 1, wherein The greenhouse gas emission amount of the close-fit pipe jacking structure in the production stage, the greenhouse gas emission amount of the close-fit pipe jacking structure in the transportation stage, and the greenhouse gas emission amount of the close-fit pipe jacking structure in the construction stage are added to obtain the total greenhouse gas emission amount of the close-fit pipe jacking structure, comprising: Generate the greenhouse gas emission amount of the close-fit pipe jacking structure in the production stage according to a consumption amount of each material in the production stage, a greenhouse gas emission factor of each material, and a first emission model; Generate the greenhouse gas emission amount of the close-fit pipe jacking structure in the transportation stage according to a transportation distance of each building material in the transportation stage, a transportation weight of each building material, and a second emission model; Generate the greenhouse gas emission amount of the close-fit pipe jacking structure in the construction stage according to a consumption energy of a machine used by each building material in the construction stage, a consumption energy of a pipe jacking machine used by the close-fit pipe jacking structure in the construction stage, a greenhouse gas emission factor of the pipe jacking machine, a transportation distance of spoil in the construction stage, a transportation weight of the spoil, a greenhouse gas emission factor of a transportation vehicle of the spoil, and a third emission model; The total greenhouse gas emission amount of the close-fit pipe jacking structure is obtained by adding the greenhouse gas emission amount of the close-fit pipe jacking structure in the production stage, the greenhouse gas emission amount of the close-fit pipe jacking structure in the transportation stage, and the greenhouse gas emission amount of the close-fit pipe jacking structure in the construction stage.

4. The method of assessing a close-fit pipe jacking structure according to claim 1, wherein The performance evaluation value of the close-fit pipe jacking structure is generated according to the total greenhouse gas emission amount of the close-fit pipe jacking structure, the preset structural safety redundancy, the total carrying capacity of the close-fit pipe jacking structure, and the performance evaluation model. The design file is obtained, and the preset structural safety redundancy is obtained from the design file. The performance evaluation value of the close-fit pipe jacking structure is generated according to the total greenhouse gas emission amount of the close-fit pipe jacking structure, the preset structural safety redundancy, the total carrying capacity of the close-fit pipe jacking structure, and the performance evaluation model.

5. The close-fit pipe jacking structure evaluation method according to claim 3, wherein the first emission model is: The second emission model is: ； represents the amount of greenhouse gas emissions of the adhering pipe structure in the production phase; represents the material serial number, represents the total number of material types; represents the amount of material consumed in the production phase of the top-tube structure; representing the greenhouse gas emission factor of the material; Indicates the first The number of times a material can be recycled; The third emission model is: ； represents the amount of greenhouse gas emissions of the adhering pipe structure in the transport phase; indicates the building material serial number, indicates the total number of building material types; represents the transportation distance of the jth building material in the transportation phase of the close-fit pipe structure; represents the transportation weight of the jth building material; Gj represents the greenhouse gas emission factor of the jth building material transport vehicle; G represents the energy consumption of the pipe jacking machine used in the construction stage of the close-fit pipe jacking structure; ； represents the amount of greenhouse gas emissions of the adhering pipe structure in the construction phase; Ej represents the energy consumption of the machinery used for the jth building material in the construction phase of the close-fit pipe structure; Ghj represents the greenhouse gas emission factor of the machinery used in the assembly process of the jth building material; The total emission model is: GWP represents the greenhouse gas emission factor of the pipe pushing machine; represents the transport distance of the muck in the construction phase for the close-fit pipe structure; represents the transport weight of the slag; represents the greenhouse gas emission factor of the transport vehicle of the slag; The application is applied to an electronic device, which comprises: ； wherein, represents the total amount of greenhouse gas emissions from the top tube structure; represents the amount of greenhouse gas emissions of the adhering pipe structure in the production phase; represents the amount of greenhouse gas emissions of the adhering pipe structure in the transport phase; The greenhouse gas emissions of the adhering pipe structure in the construction phase are represented.

6. An assessment device for an in-line pipe jacking structure according to any one of claims 1 to 5, characterized in that The first obtaining module is configured to obtain simulation construction data of the close-fit pipe jacking structure from a simulation platform, wherein the close-fit pipe jacking structure comprises a plurality of close-fit rings, and each close-fit ring is a connecting ring between adjacent pipe sections. The second obtaining module is configured to obtain assembly parameters of each close-fit ring from the simulation construction data, select a close-fit ring with assembly parameters satisfying a performance reduction condition as a performance reduction close-fit ring, and select a close-fit ring with assembly parameters not satisfying the performance reduction condition as a performance normal close-fit ring, wherein the performance reduction condition is one of a horizontal distance in the assembly parameters being greater than a preset first distance, a vertical distance in the assembly parameters being greater than a preset second distance, and a structural corner in the assembly parameters being greater than a preset corner threshold value, the performance reduction close-fit ring is a close-fit ring that reduces the performance of the close-fit pipe jacking structure, and the performance normal close-fit ring is a close-fit ring that does not reduce the performance of the close-fit pipe jacking structure. The generating module is configured to generate the total carrying capacity of the close-fit pipe jacking structure according to the number of performance reduction close-fit rings, the performance reduction percentage of each performance reduction close-fit ring, the structural bending resistance of the performance normal close-fit ring, the number of performance normal close-fit rings, and a total carrying capacity model. The adding module is configured to add the greenhouse gas emission amount of the close-fit pipe jacking structure in the production stage, the greenhouse gas emission amount of the close-fit pipe jacking structure in the transportation stage, and the greenhouse gas emission amount of the close-fit pipe jacking structure in the construction stage to obtain the total greenhouse gas emission amount of the close-fit pipe jacking structure. The evaluation module is configured to generate the performance evaluation value of the close-fit pipe jacking structure according to the total greenhouse gas emission amount of the close-fit pipe jacking structure, the preset structural safety redundancy, the total carrying capacity of the close-fit pipe jacking structure, and the performance evaluation model. The processor executes the computer program to implement the close-fit pipe jacking structure evaluation method according to any one of claims 1 to 5.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The computer program is executed by the processor to implement the close-fit pipe jacking structure evaluation method according to any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program, the computer-readable storage medium comprising: ​

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