Deformation and stress prediction method in underground structure engineering construction process and related device

Abstract

The invention belongs to the field of subway construction, and discloses a deformation and stress prediction method and related device in the underground structure engineering construction process, and the method comprises the steps: building a finite element model of a to-be-constructed underground structure engineering; the finite element model of the underground structure project to be constructed comprises a plurality of component real units; unit copying is conducted on each component real unit, and a plurality of component copying units are obtained; each component copy unit and the corresponding component real unit share a node and are mutually independent; simulating models of the underground structure project to be constructed in different construction periods are obtained by changing the activation states of the plurality of component real units and the plurality of component copying units; deformation and stress calculation is carried out based on the simulation models of the to-be-constructed underground structure engineering in different construction periods, and deformation and stress prediction results of the to-be-constructed underground structure engineering in the construction process are obtained; the deformation of the constructed structure is accurately simulated, and the accuracy of deformation and stress prediction in the underground structure engineering construction process is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of subway construction, and in particular relates to a deformation and stress prediction method and a related device during the construction process of an underground structure engineering. Background Art

[0002] During the construction of underground structure projects, the constructed structures will be deformed due to the influence of various factors, especially in the construction of underground stations using reverse construction or forward construction. The reasons for the analysis include: the influence of underground soil pressure, the creep effect of concrete and the accumulation of construction errors. Among them, the influence of underground soil pressure is mainly manifested in that the maintenance structures in underground structure projects, such as internal supports and underground continuous walls, directly bear the pressure of underground soil, causing the maintenance structures to deform. The creep effect of concrete is manifested in that the deformation of concrete structures continues to increase with time under long-term loads. The accumulation of construction errors is manifested in that in the actual construction process, due to errors in construction operations and differences in materials, inevitable construction errors occur. The accumulation of construction errors in the entire construction process will lead to deviations between the final structure and the designed structure.

[0003] At present, when conducting finite element numerical simulation of the construction process of underground structure engineering, the unit life and death technology is usually adopted, that is, some units are first set to an inactive (dead) state, and then gradually activated according to the construction progress to simulate the construction process such as soil excavation and concrete pouring; however, the traditional simulation method cannot effectively consider the deformation of the constructed structure during the construction period, resulting in the reactivated unit still in the initial position, and thus unable to truly reflect the interaction and cumulative effect between structures during the construction process, resulting in poor simulation authenticity of the construction process of underground structure engineering, which greatly reduces the deformation and stress prediction accuracy of the construction process of underground structure engineering. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention provides a deformation and stress prediction method and related devices for the construction process of an underground structure engineering project, so as to solve the technical problem that the traditional simulation method cannot effectively consider the deformation generated by the constructed structure during the construction period, resulting in poor simulation authenticity of the construction process of the underground structure engineering project, thereby greatly reducing the deformation and stress prediction accuracy of the construction process of the underground structure engineering project.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a method for predicting deformation and stress during the construction process of an underground structure engineering, comprising: According to the design scheme of the underground structure project to be constructed, a finite element model of the underground structure project to be constructed is established; wherein the finite element model of the underground structure project to be constructed includes a number of real units of components; Each real unit of the component is replicated to obtain a number of replicated components; each replicated component unit shares a node with the corresponding real unit of the component and is independent of each other; According to the construction method of the underground structure project to be constructed, by changing the activation states of several component real units and several component replica units, the construction process of the underground structure project to be constructed is simulated to obtain simulation models of different construction periods of the underground structure project to be constructed; Based on the simulation model of the underground structure project to be constructed at different construction periods, deformation and stress calculations are performed to obtain the deformation and stress prediction results of the construction process of the underground structure project to be constructed.

[0006] Furthermore, several component real units include foundation soil real units, underground continuous wall real units, temporary internal support real units and underground concrete structure real units; several component replication units include underground continuous wall replication units, temporary internal support replication units and underground concrete structure replication units.

[0007] Furthermore, the real units of foundation soil, underground continuous wall and underground concrete structure are all assigned with the material properties of Mohr-Coulomb constitutive relationship, and the real units of temporary internal support are assigned with the material properties of temporary internal support constitutive relationship; the underground continuous wall replica unit and underground concrete replica unit are all assigned with the material properties of elastoplastic damage constitutive relationship, and the temporary internal support replica unit is assigned with the material properties of elastic constitutive relationship.

[0008] Furthermore, a binding relationship is established between the end node of the temporary internal support real unit and the side wall node of the underground continuous wall real unit; a binding relationship is established between the end node of the temporary internal support replication unit and the side wall node of the underground continuous wall replication unit.

[0009] Furthermore, according to the construction method of the underground structure project to be constructed, by changing the activation states of several component real units and several component replica units, the construction process of the underground structure project to be constructed is simulated, and simulation models of different construction periods of the underground structure project to be constructed are obtained, as follows: Performing initialization operations on activation states of several component real units and several component copy units; Changing the activation states of the underground continuous wall real unit and the underground continuous wall copy unit to simulate the construction of the underground continuous wall in the underground structure project to be constructed, and obtaining a simulation model of the underground continuous wall construction period; The activation states of the real unit of the foundation soil, the real unit of the temporary internal support and the duplicate unit of the temporary internal support are changed to simulate the excavation of the foundation soil and the construction of the temporary internal support in the underground structure project to be constructed, and obtain the simulation model of the foundation soil excavation and temporary internal support construction period; The activation states of the real unit and the replica unit of the underground concrete structure are changed to simulate the construction of the underground concrete structure in the underground structure project to be constructed, and obtain a simulation model of the underground concrete structure during the construction period.

[0010] Furthermore, the activation status initialization operation is performed on several component real units and several component copy units, as follows: Set the activation status of the foundation soil real unit, underground continuous wall real unit and underground concrete structure real unit to activated; set the activation status of the temporary internal support real unit to inactivated; set the activation status of the temporary internal support copy unit to activated; set the activation status of the underground concrete structure copy unit to inactivated.

[0011] Furthermore, after initializing the activation state of the plurality of component real units and the plurality of component replica units, a ground stress balance operation step is also included; the ground stress balance operation step is specifically as follows: The ground stress balance operation is performed on the real elements of the foundation soil, the real elements of the underground continuous wall and the real elements of the underground concrete structure.

[0012] The present invention also provides a deformation and stress prediction system for underground structure engineering construction process, comprising: A finite element modeling module is used to establish a finite element model of the underground structure project to be constructed according to the design scheme of the underground structure project to be constructed; wherein the finite element model of the underground structure project to be constructed includes a number of real component units; The unit replication module is used to replicate each component real unit to obtain a number of component replication units; wherein each component replication unit shares a node with the corresponding component real unit and is independent of each other; A construction simulation module is used to simulate the construction process of the underground structure project to be constructed by changing the activation states of several component real units and several component replica units according to the construction method of the underground structure project to be constructed, so as to obtain simulation models of different construction periods of the underground structure project to be constructed; The analysis and calculation module is used to perform deformation and stress calculations based on simulation models of the underground structure project to be constructed at different construction periods, and obtain deformation and stress prediction results during the construction process of the underground structure project to be constructed.

[0013] The present invention also provides a deformation and stress prediction device for an underground structure engineering construction process, comprising: Memory for storing computer programs; A processor is used to implement the deformation and stress prediction method of the underground structure engineering construction process when executing the computer program.

[0014] The present invention also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the deformation and stress prediction method of the underground structure engineering construction process is implemented.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The deformation and stress prediction method for the construction process of an underground structure project provided by the present invention is based on a plurality of component real units in a finite element model of the underground structure project to be constructed. A component replication unit sharing a node with each component real unit is established by unit replication. The component replication unit is used to track the follow-up displacement of the structure, and accurately simulate the deformation of the constructed structure during the construction process of the underground structure project, thereby improving the simulation accuracy of the construction process of the underground structure project, and further improving the accuracy of the deformation and stress prediction results during the construction process of the underground structure project. Secondly, the plurality of component replication units and the plurality of component real units are independently arranged, and different material properties can be given to the component replication units and the component real units to realize the conversion of the unit material constitutive structure, avoid the phenomenon of limited simulation conditions, and ensure the accuracy of the simulation results.

[0016] The deformation and stress prediction system for underground structure engineering construction process, the deformation and stress prediction device for underground structure engineering construction process and the computer-readable storage medium provided by the present invention have all the advantages of the deformation and stress prediction method for underground structure engineering construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A flow chart of the deformation and stress prediction method for the construction process of an underground structure project provided in Example 1; Figure 2 A structural block diagram of a deformation and stress prediction system for an underground structure engineering construction process provided in Example 2; Figure 3 This is a structural block diagram of the deformation and stress prediction equipment for the underground structure engineering construction process provided in Example 3. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects solved by this application clearer, the technical solutions in the embodiments of this application will be described clearly and completely in combination with the drawings in the embodiments of this application; obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] Terminology explanation: Mohr-Coulomb constitutive model: a model commonly used in material mechanics to calculate the stress-strain relationship of materials.

[0021] Activation status: refers to whether the unit in the finite element model participates in the calculation during the model solution process; for example, in ANSYS finite element software (a computer-aided engineering software), you can use the EKILL command (unit kill command) to kill the unit to make the unit in an inactive state; use the EALIVE command (unit activation command) to reactivate the unit to make the unit in an active state.

[0022] Example 1 As attached Figure 1 As shown, this embodiment 1 provides a deformation and prediction method for an underground structure construction process, comprising the following steps: Step 1: According to the design scheme of the underground structure project to be constructed, a finite element model of the underground structure project to be constructed is established; wherein the finite element model of the underground structure project to be constructed includes a plurality of real component units.

[0023] Specifically, according to the design plan of the underground structure project to be constructed, ABAQUS finite element software (an advanced finite element analysis software developed by Simulia) is used to construct a finite element model containing real units of several components to obtain the finite element model of the underground structure project to be constructed.

[0024] It should be noted that other finite element analysis software, such as ANSYS finite element software or SolidWorks Simulation finite element software (a finite element software for engineering simulation), may also be used to establish the finite element model of the underground structure project to be constructed, and this application does not make specific limitations on this.

[0025] Step 2: perform unit replication on each component real unit to obtain a number of component replication units; wherein each component replication unit shares nodes with the corresponding component real unit and is independent of each other.

[0026] Specifically, the process of replicating each real unit of each component is implemented as follows: In the finite element model of the underground structure project to be constructed, select the real unit of the component that needs to be copied.

[0027] Based on the selected real unit of the component to be copied, a component copy unit corresponding to the selected real unit of the component to be copied is obtained by creating a new unit instance; wherein, the method of creating a new unit instance is realized by the mirror or rotation function of the ABAQUS finite element software; it should be noted that, by creating a new unit instance, it can be ensured that the new unit and the original unit remain continuous at the node, that is, it is ensured that each component copy unit shares a node with the corresponding real unit of the component.

[0028] The naming rule of the component replication unit is as follows: the unit number of the real unit of the component + the total number of units of the finite element model of the underground structure project to be constructed + 1.

[0029] It should also be noted that when the underground structure project to be constructed is the underground structure of a subway station, the construction plan for the underground structure to be constructed includes underground continuous wall construction, foundation soil excavation and temporary internal support construction, and underground concrete structure construction; at this time, the real units of several components include foundation soil real units, underground continuous wall real units, temporary internal support real units, and underground concrete structure real units; the replicated units of several components include underground continuous wall replicated units, temporary internal support replicated units, and underground concrete structure replicated units.

[0030] Specifically, the underground continuous wall real unit and the underground continuous wall replica unit share nodes and are independent of each other, the temporary internal support real unit and the temporary internal support replica unit share nodes and are independent of each other, and the underground concrete structure real unit and the underground concrete structure replica unit share nodes and are independent of each other.

[0031] Step 3, assign material properties to several real units and several replicated units of components respectively. Among them, the material properties of the Mohr-Coulomb constitutive relationship are assigned to the real units of the foundation soil, the real units of the underground continuous wall and the real units of the underground concrete structure respectively, and the material properties of the temporary internal support constitutive relationship are assigned to the real units of the temporary internal support; the material properties of the elastoplastic damage constitutive relationship are assigned to the replicated units of the underground continuous wall and the replicated units of the underground concrete structure respectively, and the material properties of the elastic constitutive relationship are assigned to the replicated units of the temporary internal support.

[0032] Specifically, the process of assigning material properties to a number of real units and a number of replicated units of a component is as follows: Select a foundation soil real unit, an underground continuous wall real unit or an underground concrete real unit; create or select a predefined material property of the Mohr-Coulomb constitutive model in the Property module of the ABAQUS finite element software, and assign the material property of the predefined Mohr-Coulomb constitutive model to the selected foundation soil real unit, underground continuous wall real unit or underground concrete real unit.

[0033] Select the temporary internal support real unit; create or select the material properties of the predefined temporary internal support constitutive relationship in the Property module of the ABAQUS finite element software; assign the material properties of the predefined temporary internal support constitutive relationship to the selected underground concrete structure real unit.

[0034] Select an underground continuous wall replication unit or an underground concrete structure replication unit; create or select a predefined elastic-plastic damage constitutive material property in a property module of the ABAQUS finite element software; assign the predefined elastic-plastic damage constitutive material property to the selected underground continuous wall replication unit or underground concrete structure replication unit.

[0035] Select a temporary internal support replication unit; create or select a predefined material property of an elastic-plastic damage constitutive model in a property module of the ABAQUS finite element software; assign the predefined material property of the elastic-plastic damage constitutive model to the selected temporary internal support replication unit.

[0036] Step 4: Apply model interaction.

[0037] Specifically, the end node of the temporary internal support real unit is bound to the side wall node of the underground continuous wall real unit to establish a binding relationship between the end node of the temporary internal support real unit and the side wall node of the underground continuous wall real unit; the end node of the temporary internal support copy unit is bound to the side wall node of the underground continuous wall copy unit to establish a binding relationship between the end node of the temporary internal support copy unit and the underground continuous wall copy unit.

[0038] By establishing a binding relationship between the end node of the temporary internal support real unit and the side wall node of the underground continuous wall real unit, and by establishing a binding relationship between the end node of the temporary internal support copy unit and the underground continuous wall copy unit, the connection between the temporary internal support and the underground continuous wall in the underground structure project to be constructed is simulated.

[0039] Step 5: According to the construction method of the underground structure project to be constructed, by changing the activation states of several component real units and several component copy units, the construction process of the underground structure project to be constructed is simulated to obtain simulation models of different construction periods of the underground structure project to be constructed.

[0040] Specifically, the process of obtaining the simulation model of the underground structure project to be constructed at different time periods is as follows: Step 51: Initialize the activation status of a plurality of component real units and a plurality of component copy units.

[0041] Specifically, the activation status of the foundation soil real unit, the underground continuous wall real unit and the underground concrete structure real unit is set to activated to simulate the foundation soil in the unconstructed state of the underground structure project to be constructed; the activation status of the temporary internal support real unit is set to inactivated, and the activation status of the temporary internal support copy unit is set to activated to simulate the temporary internal support that has not yet been constructed; the activation status of the underground concrete structure copy unit is set to inactivated to simulate the underground concrete structure that has not yet been constructed.

[0042] Step 52: Perform ground stress balance operation on the foundation soil real unit, the underground continuous wall real unit and the underground concrete structure real unit.

[0043] Specifically, in the ABAQUS finite element software, the ground stress balance operation is performed on the real unit of the foundation soil, the real unit of the underground continuous wall and the real unit of the underground concrete structure through the Auto mode in the static analysis step.

[0044] Step 53, changing the activation status of the underground continuous wall real unit and the underground continuous wall copy unit to simulate the construction of the underground continuous wall in the underground structure project to be constructed, and obtaining a simulation model of the underground continuous wall construction period.

[0045] Specifically, the activation state of the underground continuous wall real unit is first set to inactivated, and then the activation state of the underground continuous wall copy unit is set to activated, so as to simulate the underground continuous wall trenching and reinforced concrete pouring construction process in the underground structure project to be constructed.

[0046] Step 54, changing the activation status of the foundation soil real unit, the temporary internal support real unit and the temporary internal support replica unit to simulate the excavation of the foundation soil and the construction of the temporary internal support in the underground structure project to be constructed, and obtaining a simulation model of the foundation soil excavation and temporary internal support construction period.

[0047] Specifically, first, the activation status of some foundation soil real units located above the temporary internal support units is set to inactivated; then the activation status of the temporary internal support real units is set to activated, and the activation status of the temporary internal support copy units is set to inactivated; then the activation status of the remaining foundation soil real units is set to inactivated, thus completing the excavation of the foundation soil in the underground structure project to be constructed and the construction simulation of the temporary internal support.

[0048] Step 55: Change the activation status of the underground concrete structure real unit and the underground concrete structure replica unit to simulate the construction of the underground concrete structure in the underground structure project to be constructed, and obtain a simulation model of the underground concrete structure during the construction period.

[0049] Specifically, the activation state of the real unit of the underground concrete structure is first set to activated, and then the activation state of the duplicate unit of the underground concrete structure is set to inactivated, so as to complete the construction simulation of the underground concrete structure in the underground structure project to be constructed.

[0050] Step 6: Calculate deformation and stress based on the simulation model of the underground structure project to be constructed at different construction periods to obtain deformation and stress prediction results during the construction process of the underground structure project to be constructed.

[0051] Specifically, the implementation steps are as follows: Step 61: perform deformation and stress calculation based on the simulation model of the underground continuous wall construction period to obtain deformation and stress prediction results of the underground continuous wall construction period in the underground structure project to be constructed.

[0052] Step 62: Deformation and stress calculations are performed based on the simulation model of the foundation soil excavation and temporary internal support construction period to obtain deformation and stress prediction results of the foundation soil excavation and temporary internal support construction period in the underground structure project to be constructed.

[0053] Step 63: Perform deformation and stress calculation based on the simulation model of the underground concrete structure during the construction period to obtain deformation and stress prediction results of the underground concrete structure during the construction period in the underground structure project to be constructed.

[0054] It should be noted that when performing deformation and stress calculations on the simulation model of the underground continuous wall construction period, the simulation model of the foundation soil excavation and temporary internal support construction period, and the simulation model of the underground concrete structure construction period, ABAQUS finite element software is used to generate displacement cloud maps and stress cloud maps. The deformation and stress prediction results of the corresponding construction period can be obtained through the generated displacement cloud maps and stress cloud maps.

[0055] The following uses the deformation and stress prediction process of the underground structure of a subway station as an example to supplement the deformation and stress prediction method of the underground structure engineering construction process described in Example 1; wherein, there are three temporary internal supports in the underground structure of the example subway station, and the underground concrete structure is a three-layer structure; specifically, the example is described as follows: S1. According to the design scheme of the underground structure of the example subway station, a finite element model of the underground structure of the example subway station is established; wherein the finite element model of the underground structure of the example subway station includes the real unit of the foundation soil , underground continuous wall real unit , the first temporary internal support real unit , the second temporary internal support real unit , the third temporary internal support real unit , the concrete structure of the underground floor is a real unit , real unit of the underground second floor concrete structure And the three-story underground concrete structure real unit .

[0056] S2, respectively for the real unit of underground continuous wall , the first temporary internal support real unit , the second temporary internal support real unit , the third temporary internal support real unit , the concrete structure of the underground floor is a real unit , real unit of the underground second floor concrete structure And the three-story concrete structure real unit Perform unit replication to obtain underground continuous wall replication unit , the first temporary internal support replication unit , the second temporary internal support replication unit , the third temporary internal support replication unit , underground first floor concrete structure replication unit , underground second floor concrete structure replication unit and underground three-story concrete structure replica unit .

[0057] S3. Real unit of foundation soil , underground continuous wall real unit , the concrete structure of the underground floor is a real unit , real unit of the underground second floor concrete structure And the three-story concrete structure real unit All of them are given the material properties of Mohr-Coulomb constitutive model; for the first temporary internal support real unit , the second temporary internal support real unit And the third temporary internal support real unit Assign material properties to the constitutive relation of the temporary internal support; copy the unit to the first temporary internal support , the second temporary internal support replication unit And the third temporary internal support replication unit Assign material properties to the elastic constitutive model; the elastic modulus in the material properties of the elastic constitutive model is 1 / 10000 of the elastic modulus in the material properties of the temporary internal support constitutive relationship; , underground first floor concrete structure replication unit , underground second floor concrete structure replication unit and underground three-story concrete structure replica unit Assign material properties for the elastoplastic damage constitutive model respectively.

[0058] S4. Support the first temporary internal real unit The end nodes and the second temporary internal support real element The end nodes and the third temporary internal support real element The end nodes of the underground continuous wall are respectively At the same time, the first temporary internal support copy unit The end node of the second temporary internal support replication unit The end node and the third temporary internal support replication unit The end nodes of the underground continuous wall replication unit The side wall nodes are bound.

[0059] S5. The real unit of foundation soil , underground continuous wall real unit , the concrete structure of the underground floor is a real unit , real unit of the underground second floor concrete structure And the three-story concrete structure real unit The activation state of the first temporary internal support real element is set to active; , the second temporary internal support real unit and the activation status of the third temporary internal support real unit is set to inactive; the first temporary internal support copy unit , the second temporary internal support replication unit And the third temporary internal support replication unit Set the activation status of the underground first floor concrete structure to active; copy the unit , underground second floor concrete structure replication unit and underground three-story concrete structure replica unit The activation status of is set to Inactive.

[0060] S6. Real unit of foundation soil , underground continuous wall real unit , the concrete structure real unit of the underground floor , real unit of the underground second floor concrete structure And the three-story concrete structure real unit Perform a geostress balance operation.

[0061] S7. The actual unit of underground continuous wall Set the activation status of the underground continuous wall to inactive and copy the unit The activation state is set to active to obtain the simulation model of the underground continuous wall construction period.

[0062] S8, first support the real unit located in the first temporary The actual unit of the soil foundation above Set the activation state of the first temporary internal support real element to inactive; then Set the activation state to active and copy the first temporary internal support unit The activation state is set to inactive; then the real unit in the second temporary inner support The actual unit of the upper part of the foundation soil Set the activation status of the second temporary internal support real element to inactive; then Set the activation state to active and copy the second temporary internal support unit The activation state is set to inactive; then the real unit located in the third temporary inner support The actual unit of the soil foundation above Set the activation status of the third temporary internal support real element to inactive; then Set the activation status to active and copy the third temporary internal support unit Finally, the remaining real elements of the foundation soil are set to The activation status of is set to inactive to obtain a simulation model of the underground concrete structure during the construction period.

[0063] S9. First, the three-story underground concrete structure real unit Set the activation state to active and copy the three-story concrete structure to The activation status is set to inactive; then the real unit of the underground second floor concrete structure Set the activation status to active and copy the unit of the underground second floor concrete structure The activation state of the underground first floor concrete structure real unit is set to inactive. Set the activation status to active and copy the underground concrete structure unit The activation state of is set to inactive to obtain a simulation model of the underground concrete structure during the construction period.

[0064] S10. Perform deformation and stress calculations on the simulation model of the underground continuous wall construction period, and output the deformation and stress prediction results of the underground continuous wall construction period in the underground structure of the example subway station; perform deformation and stress calculations on the simulation model of the foundation soil excavation and temporary internal support construction period, and output the deformation and stress prediction results of the underground structure of the example subway station during the foundation soil excavation and temporary internal support construction period; perform deformation and stress calculations on the simulation model of the underground concrete structure construction period, and output the deformation and stress prediction results of the underground concrete structure construction period in the underground structure of the example subway station.

[0065] The deformation and stress prediction method for the construction process of an underground structure project described in Example 1 establishes a component replication unit that shares a node with each component real unit by means of unit replication, and assigns material properties to the component real unit and the component replication unit respectively, so that the component replication unit can achieve follow-up without affecting the stress deformation of the structure; wherein, in the simulation of the construction process, the activation state of the component original unit is set to inactivated, and the activation state of the component replication unit is set to activated to simulate the state of the structure not being constructed; when the structure starts to be constructed, the activation state of the component original unit is set to activated, and the activation state of the component replication unit is set to inactivated to simulate the addition of the structure; when the structure needs to be deleted and no further additions are made subsequently, the component original unit and the component replication unit are deleted at the same time; when the structure currently needs to be deleted and needs to be added again subsequently, the activation state of the component original unit is set to inactivated and the activation state of the component replication unit is kept activated until the structure needs to be added again, the activation state of the component original unit is set to activated again, and the activation state of the component replication unit is set to inactivated.

[0066] Example 2 As attached Figure 2 As shown, this embodiment 2 provides a deformation and stress prediction system for the construction process of an underground structure engineering project, including a finite element modeling module, a unit replication module, a construction simulation module and an analysis and calculation module.

[0067] The finite element modeling module is used to establish a finite element model of the underground structure project to be constructed according to the design plan of the underground structure project to be constructed; wherein the finite element model of the underground structure project to be constructed includes a number of real units of components; specifically, according to the design plan of the underground structure project to be constructed, ABAQUS finite element software (an advanced finite element analysis software developed by Simulia) is used to construct a finite element model including a number of real units of components to obtain the finite element model of the underground structure project to be constructed.

[0068] The unit replication module is used to perform unit replication on each component real unit to obtain a number of component replication units; wherein each component replication unit shares a node with the corresponding component real unit and is independent of each other; specifically, the process of performing unit replication on each component real unit is implemented as follows: In the finite element model of the underground structure project to be constructed, the real unit of the component to be copied is selected. Based on the selected real unit of the component to be copied, a component copy unit corresponding to the selected real unit of the component to be copied is obtained by creating a new unit instance; wherein, the method of creating a new unit instance is realized by the mirror or rotation function of the ABAQUS finite element software; it should be noted that by creating a new unit instance, it can be ensured that the new unit and the original unit remain continuous at the node, that is, it is ensured that each component copy unit and the corresponding real unit share the node.

[0069] The simulation construction module is used to simulate the construction process of the underground structure project to be constructed by changing the activation states of several component real units and several component copy units according to the construction method of the underground structure project to be constructed, and obtain the simulation model of the underground structure project to be constructed at different construction periods. Specifically, the process of obtaining the simulation model of the underground structure project to be constructed at different periods is as follows: Initialize the activation status of several component real units and several component copy units. Perform ground stress balance operations on the foundation soil real unit, underground continuous wall real unit and underground concrete structure real unit. Change the activation status of the underground continuous wall real unit and the underground continuous wall copy unit to simulate the construction of the underground continuous wall in the underground structure project to be constructed, and obtain a simulation model of the underground continuous wall construction period. Change the activation status of the foundation soil real unit, the temporary internal support real unit and the temporary internal support copy unit to simulate the excavation of the foundation soil and the construction of the temporary internal support in the underground structure project to be constructed, and obtain a simulation model of the foundation soil excavation and temporary internal support construction period. Change the activation status of the underground concrete structure real unit and the underground concrete structure copy unit to simulate the construction of the underground concrete structure in the underground structure project to be constructed, and obtain a simulation model of the underground concrete structure construction period.

[0070] The analysis and calculation module is used to calculate deformation and stress based on the simulation model of the underground structure project to be constructed at different construction periods, and obtain the deformation and stress prediction results of the construction process of the underground structure project to be constructed. Specifically, the implementation steps are as follows: The deformation and stress calculations are performed on the simulation model of the underground continuous wall construction period, and the deformation and stress prediction results of the underground continuous wall construction period in the underground structure project to be constructed are output. The deformation and stress calculations are performed on the simulation model of the foundation soil excavation and temporary internal support construction period, and the deformation and stress prediction results of the foundation soil excavation and temporary internal support construction period in the underground structure project to be constructed are output. The deformation and stress calculations are performed on the simulation model of the underground concrete structure construction period, and the deformation and stress prediction results of the underground concrete structure construction period in the underground structure project to be constructed are output.

[0071] Preferably, the deformation and stress prediction system for the underground structure engineering construction process further includes a material assignment module and an action application module.

[0072] The material assignment module is used to assign material properties to several real units and several replicated units of components. The material properties of the Mohr-Coulomb constitutive relationship are assigned to the real units of the foundation soil, the real units of the underground continuous wall and the real units of the underground concrete structure, and the material properties of the temporary internal support constitutive relationship are assigned to the real units of the temporary internal support; the material properties of the elastoplastic damage constitutive relationship are assigned to the replicated units of the underground continuous wall and the replicated units of the underground concrete structure, and the material properties of the elastic constitutive relationship are assigned to the replicated units of the temporary internal support.

[0073] The action application module is used to apply model interaction. Specifically, the end node of the temporary internal support real unit is bound to the side wall node of the underground continuous wall real unit, so that a binding relationship is established between the end node of the temporary internal support real unit and the side wall node of the underground continuous wall real unit; the end node of the temporary internal support replica unit is bound to the side wall node of the underground continuous wall replica unit, so that a binding relationship is established between the end node of the temporary internal support replica unit and the underground continuous wall replica unit.

[0074] Example 3 As attached Figure 3 As shown, this embodiment 3 provides a deformation and stress prediction device for an underground structure engineering construction process, including: a processor, a memory, and a computer program stored in the memory and executable on the processor, such as a deformation and stress prediction method program for an underground structure engineering construction process; wherein the attached Figure 3 The communication interface in is used to access external devices to obtain data.

[0075] When the processor executes the computer program, the steps of the deformation and stress prediction method for the underground structure engineering construction process are implemented; or, when the processor executes the computer program, the functions of each module in the above system are implemented.

[0076] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program in the deformation and stress prediction device during the construction process of the underground structure engineering.

[0077] The deformation and stress prediction device for the underground structure engineering construction process can be a computing device such as a desktop computer, a notebook, a PDA, and a cloud server. The deformation and stress prediction device for the underground structure engineering construction process can include, but is not limited to, a processor and a memory. Those skilled in the art will understand that the attached Figure 3 The schematic diagram is only an example of the deformation and stress prediction device for the underground structure engineering construction process, and does not constitute a limitation of the deformation and stress prediction device for the underground structure engineering construction process. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the deformation and stress prediction device for the underground structure engineering construction process may also include input and output devices, network access equipment, buses, etc.

[0078] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the deformation and stress prediction device during the construction process of the underground structure engineering, and uses various interfaces and lines to connect various parts of the deformation and stress prediction device during the construction process of the entire underground structure engineering.

[0079] The memory can be used to store the computer program and / or module, and the processor realizes various functions of the deformation and stress prediction device during the construction process of the underground structure engineering by running or executing the computer program and / or module stored in the memory and calling the data stored in the memory.

[0080] The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMediaCard, SMC), a secure digital (SecureDigital, SD) card, a flash card (FlashCard), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0081] Example 4 This embodiment 4 also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the steps of the deformation and stress prediction method for the construction process of an underground structure engineering project.

[0082] The module / unit integrated with the deformation and stress prediction equipment during the construction process of underground structure engineering can 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 an independent product.

[0083] Based on such understanding, the present embodiment 4 implements all or part of the processes in the deformation and stress prediction method in the construction process of the underground structure engineering, and can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, the steps of the deformation and stress prediction method in the construction process of the underground structure engineering can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc.

[0084] The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0085] It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media does not include electrical carrier signals and telecommunication signals.

[0086] The method for predicting deformation and stress during the construction process of underground structure engineering provided by the present invention utilizes component replication units to track the follow-up displacement of the structure, and then can track the deformation of the constructed structure during the construction process, so that subsequent structural construction can take into account the deformation of the constructed structure, and achieve accurate prediction of deformation and stress; secondly, it can realize the conversion of unit material constitutive structure without the need to create additional units, greatly simplifying the complexity of modeling.

[0087] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A method for predicting deformation and stress during construction of underground structure engineering, characterized in that: include: According to the design scheme of the underground structure project to be constructed, a finite element model of the underground structure project to be constructed is established; wherein the finite element model of the underground structure project to be constructed includes a number of real units of components; Each real unit of the component is replicated to obtain a number of replicated components; each replicated component unit shares a node with the corresponding real unit of the component and is independent of each other; According to the construction method of the underground structure project to be constructed, by changing the activation states of several component real units and several component replica units, the construction process of the underground structure project to be constructed is simulated to obtain simulation models of different construction periods of the underground structure project to be constructed; Based on the simulation model of the underground structure project to be constructed at different construction periods, deformation and stress calculations are performed to obtain deformation and stress prediction results during the construction process of the underground structure project to be constructed.

2. A method for predicting deformation and stress during construction of underground structure engineering according to claim 1, characterized in that: The real units of several components include the real unit of foundation soil, the real unit of underground continuous wall, the real unit of temporary internal support and the real unit of underground concrete structure; The plurality of component replication units include an underground continuous wall replication unit, a temporary internal support replication unit and an underground concrete structure replication unit.

3. A method for predicting deformation and stress during construction of underground structure engineering according to claim 2, characterized in that: The real units of foundation soil, underground continuous wall and underground concrete structure are all assigned with the material properties of Mohr-Coulomb constitutive relationship, and the real units of temporary internal support are assigned with the material properties of temporary internal support constitutive relationship; the underground continuous wall replica unit and underground concrete replica unit are all assigned with the material properties of elastoplastic damage constitutive relationship, and the temporary internal support replica unit is assigned with the material properties of elastic constitutive relationship.

4. A method for predicting deformation and stress during construction of underground structure engineering according to claim 2, characterized in that: A binding relationship is established between the end node of the temporary internal support real unit and the side wall node of the underground continuous wall real unit; A binding relationship is established between the end node of the temporary internal support replication unit and the side wall node of the underground continuous wall replication unit.

5. The method for predicting deformation and stress during construction of an underground structure engineering according to claim 2, characterized in that: According to the construction method of the underground structure project to be constructed, by changing the activation states of several component real units and several component copy units, the construction process of the underground structure project to be constructed is simulated, and the simulation model of the underground structure project to be constructed at different construction periods is obtained, as follows: Performing initialization operations on activation states of several component real units and several component copy units; Changing the activation states of the underground continuous wall real unit and the underground continuous wall copy unit to simulate the construction of the underground continuous wall in the underground structure project to be constructed, and obtaining a simulation model of the underground continuous wall construction period; The activation states of the real unit of the foundation soil, the real unit of the temporary internal support and the duplicate unit of the temporary internal support are changed to simulate the excavation of the foundation soil and the construction of the temporary internal support in the underground structure project to be constructed, and obtain the simulation model of the foundation soil excavation and temporary internal support construction period; The activation states of the real unit and the replica unit of the underground concrete structure are changed to simulate the construction of the underground concrete structure in the underground structure project to be constructed, and obtain a simulation model of the underground concrete structure during the construction period.

6. A method for predicting deformation and stress during construction of underground structure engineering according to claim 5, characterized in that: The activation status of several component real units and several component copy units is initialized as follows: Set the activation status of the foundation soil real unit, underground continuous wall real unit and underground concrete structure real unit to activated; set the activation status of the temporary internal support real unit to inactivated; Set the activation state of the temporary internal support replication unit to activated; set the activation state of the underground concrete structure replication unit to inactivated.

7. A method for predicting deformation and stress during construction of underground structure engineering according to claim 5, characterized in that: After initializing the activation state of a plurality of component real units and a plurality of component copy units, a ground stress balance operation step is also included; the ground stress balance operation step is specifically as follows: The ground stress balance operation is performed on the real elements of the foundation soil, the real elements of the underground continuous wall and the real elements of the underground concrete structure.

8. A deformation and stress prediction system for underground structure engineering construction process, characterized in that: include: A finite element modeling module is used to establish a finite element model of the underground structure project to be constructed according to the design scheme of the underground structure project to be constructed; wherein the finite element model of the underground structure project to be constructed includes a number of real component units; The unit replication module is used to replicate each component real unit to obtain a number of component replication units; wherein each component replication unit shares a node with the corresponding component real unit and is independent of each other; A construction simulation module is used to simulate the construction process of the underground structure project to be constructed by changing the activation states of several component real units and several component replica units according to the construction method of the underground structure project to be constructed, so as to obtain simulation models of different construction periods of the underground structure project to be constructed; The analysis and calculation module is used to calculate deformation and stress based on the simulation model of the underground structure project to be constructed at different construction periods, and obtain the deformation and stress prediction results of the construction process of the underground structure project to be constructed.

9. A deformation and stress prediction device for underground structure engineering construction process, characterized in that: include: Memory for storing computer programs; A processor is used to implement the deformation and stress prediction method for the construction process of an underground structure engineering project as described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for predicting deformation and stress during the construction process of an underground structure engineering project as described in any one of claims 1 to 7 is implemented.

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