Simulation method and device for foundation pit enclosure structure, electronic equipment and storage medium

Abstract

A foundation pit support structure simulation method and device, electronic equipment and storage medium are disclosed. The features include: obtaining simulation excavation support information for simulating foundation pit excavation support, determining foundation pit simulation load according to the simulation excavation support information; obtaining foundation pit deformation range for simulating foundation pit excavation support, determining simulation support structure for foundation pit simulation according to the foundation pit deformation range; simulating foundation pit excavation support process according to the simulation support structure and the foundation pit simulation load, and determining deformation process of the simulation support structure. The dynamic mechanical response of stratum and support structure in foundation pit excavation support is realized, the dynamic process of foundation pit deformation control in foundation pit excavation support can be reflected, and the feasibility and stability of the control algorithm in the simulation process can be automatically evaluated.

Description

Technical Field

[0001] This invention relates to the field of foundation pit excavation and support simulation, and in particular to a simulation method, apparatus, electronic device, and storage medium for foundation pit retaining structures. Background Technology

[0002] Deformation control of foundation pit excavation, support, and retaining structures is a crucial aspect of foundation pit engineering. Due to the workload and unique characteristics of foundation pit excavation, it is difficult to conduct experimental simulations of the deformation control of the retaining structure during excavation by actually excavating the foundation pit and supporting the retaining structure. To simulate the foundation pit excavation and support process experimentally, and considering cost savings and personnel safety, similarity theory is typically used to simulate foundation pit excavation. Existing technologies usually set up fixed simulation devices or models for different geological strata. While these can obtain simulation information for the corresponding strata, they cannot reflect the dynamic process of foundation pit deformation control, nor can they evaluate the control performance of the control algorithm on the retaining structure during foundation pit excavation and support. Summary of the Invention

[0003] This invention provides a method, apparatus, electronic device, and storage medium for simulating foundation pit retaining structures to achieve fully automated and accurate testing of window applications.

[0004] According to one aspect of the present invention, a method for simulating the retaining structure of a foundation pit is provided, comprising:

[0005] Obtain the simulated excavation and support information of the simulated foundation pit, and determine the simulated foundation pit load based on the simulated excavation and support information.

[0006] Obtain the deformation range of the foundation pit in the foundation pit excavation and support simulation, and determine the simulated retaining structure of the foundation pit based on the foundation pit deformation range;

[0007] Based on the simulated retaining structure and the simulated excavation and support process of the foundation pit under the simulated load, the deformation process of the simulated retaining structure is determined.

[0008] According to another aspect of the present invention, a simulation device for a foundation pit retaining structure is provided, comprising:

[0009] The simulated load determination module is used to acquire simulated excavation and support information of the simulated foundation pit excavation and support, and to determine the simulated foundation pit load based on the simulated excavation and support information.

[0010] The retaining structure determination module is used to obtain the deformation range of the foundation pit in the foundation pit excavation and support simulation, and to determine the simulated retaining structure of the foundation pit based on the foundation pit deformation range.

[0011] The foundation pit excavation and support simulation module is used to determine the deformation process of the simulated retaining structure based on the simulated retaining structure and the simulated foundation pit load during the foundation pit excavation and support process.

[0012] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0013] At least one processor; and

[0014] A memory communicatively connected to the at least one processor; wherein,

[0015] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the simulation method for the foundation pit retaining structure according to any embodiment of the present invention.

[0016] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the simulation method of the foundation pit retaining structure according to any embodiment of the present invention.

[0017] The technical solution of this invention obtains simulated excavation and support information for a simulated foundation pit, determines the simulated load on the foundation pit based on this information, and determines the simulated load by defining the scenario of the foundation pit excavation and support simulation and the actual foundation pit excavation data. This ensures the simulation closely matches the experimental scenario and improves the accuracy of the experiment. Furthermore, the invention obtains the deformation range of the foundation pit in the simulation, determines the simulated retaining structure based on this range, and selects the strength and materials of the simulated retaining structure according to real-time excavation data to meet the simulation requirements and prevent simulation deviations. The simulation method is flawed. Based on the simulated retaining structure and the simulated load of the foundation pit, the deformation process of the simulated retaining structure is determined. By simulating the load and the retaining structure, the entire foundation pit excavation and support process is simulated, and the response and dynamic change process of the retaining structure during the entire load loading process is determined. This method can reflect the dynamic process of foundation pit deformation control during foundation pit excavation and support, solving the technical problem that existing technologies cannot simulate the dynamic response process of foundation pit retaining structures. It realizes the dynamic mechanical response of the strata and retaining structure during foundation pit excavation and support, and automatically evaluates the feasibility and stability of the control algorithm during the simulation process.

[0018] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart of a simulation method for a foundation pit retaining structure provided in Embodiment 1 of the present invention;

[0021] Figure 2 This is a flowchart of another simulation method for a foundation pit retaining structure provided in Embodiment 2 of the present invention;

[0022] Figure 3 A schematic diagram of a simulation device for a foundation pit retaining structure provided in an embodiment of the present invention;

[0023] Figure 4 This is a simulation diagram illustrating the initial state of a foundation pit, as disclosed in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of a simulation device for a foundation pit retaining structure provided in Embodiment 3 of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of an electronic device that implements the simulation method of the foundation pit retaining structure according to the embodiments of the present invention. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] Example 1

[0028] Figure 1 This is a flowchart of a simulation method for a foundation pit retaining structure provided in Embodiment 1 of the present invention. This embodiment is applicable to simulating the mechanical response of the retaining structure during the process from foundation pit excavation to retaining structure support. This method can be executed by a simulation device for the foundation pit retaining structure, which can be implemented in hardware and / or software and can be configured in an electronic device. Figure 1 As shown, the method includes:

[0029] S110. Obtain the simulated excavation support information of the simulated foundation pit excavation support, and determine the simulated foundation pit load based on the simulated excavation support information.

[0030] Among them, the foundation pit excavation and support can be carried out by excavating equipment in a coordinated manner on the outside and inside of the foundation pit, and by setting up corresponding foundation pit support devices.

[0031] The simulated excavation and support information can be the excavation and support information to be simulated during the foundation pit excavation process and the fence support process. For example, the simulated excavation and support information can include at-rest earth pressure, passive earth pressure, active earth pressure, and the deformation range of the foundation pit.

[0032] The simulated load for the foundation pit can be the load applied to the retaining structure during the indoor simulation of foundation pit excavation and support. The simulated load for the foundation pit can be used to apply loads to the indoor simulation model.

[0033] Specifically, for the simulation scenario of foundation pit excavation and support, the simulated excavation and support information during the actual excavation and support process is determined. Based on the similarity theory of simulation, the simulated excavation and support information is converted into the simulated foundation pit load of the indoor foundation pit excavation and support model. Here, the similarity theory can be that during the model simulation process, corresponding elements of the model and the prototype are similar.

[0034] Optionally, in another optional embodiment of the present invention, the simulated excavation support information includes static earth pressure, passive earth pressure and active earth pressure; determining the simulated load of the foundation pit based on the simulated excavation support information includes: obtaining the similarity dimension ratio and the stiffness of the equivalent soil spring of the foundation pit simulation respectively.

[0035] The static load of the foundation pit is determined based on the similarity size ratio and the static earth pressure.

[0036] Based on the similar size ratio and the stiffness of the equivalent soil spring, spring load simulations are performed on the active earth pressure and the passive earth pressure, respectively. During the spring load simulation process, the load that reaches the simulated active earth pressure is determined as the excavation load of the foundation pit, and the load that reaches the simulated passive earth pressure is determined as the foundation pit support load.

[0037] Earth pressure at rest can be defined as the pressure exerted by the soil on the retaining structure when the foundation pit is still and in elastic equilibrium before excavation. The static load on the foundation pit can simulate the state before excavation. Optionally, earth pressure at rest can be used to simulate the state before excavation and / or the state after the retaining structure is supported. The static load on the foundation pit can simulate the load applied to the simulated retaining structure before excavation begins. The static load on the foundation pit can be used to keep the simulated fence structure static.

[0038] Active earth pressure can be the earth pressure applied to the retaining structure during the excavation and support process of a foundation pit. This pressure arises when the soil behind the retaining structure is applied to it, causing displacement or deformation, until the soil behind the retaining structure reaches an active limit equilibrium state and a sliding surface appears. Optionally, active earth pressure can be used to simulate the elastic deformation of the foundation pit retaining structure under load during excavation. The foundation pit excavation load can be the load applied to the simulated retaining structure at the start of excavation, causing deformation. The foundation pit excavation load can also be the load that causes elastic deformation of the simulated retaining structure.

[0039] Passive earth pressure can be the earth pressure applied to the retaining structure during the excavation and support process of a foundation pit, caused by reinforcing or adding to the retaining structure, resulting in soil displacement under the pressure of the retaining structure. This earth pressure occurs when the soil behind the retaining structure reaches a passive limit equilibrium state and a sliding surface appears. Optionally, passive earth pressure can be used to simulate the elastic deformation of the retaining structure caused by the applied load during the foundation pit support process. Foundation pit support load can be the load applied to the simulated retaining structure during the simulated foundation pit support process, causing the retaining structure to recover its elastic deformation. The foundation pit support load can also be used to cause the simulated retaining structure to recover the elastic deformation that occurred during the simulated foundation pit excavation and support process. For example, based on the characteristic parameters of the soil in the actual excavation scenario, the passive and active earth pressures during the corresponding foundation pit excavation and support processes can be calculated using Rankine earth pressure theory.

[0040] Among them, the similarity size ratio can be the similarity ratio between each size of the similar simulation and the actual excavation and support scenario when simulating the foundation pit excavation and support through similarity theory.

[0041] The equivalent soil spring can be a soil spring that represents the soil in an actual foundation pit excavation and support scenario. For example, the equivalent soil spring can be calculated by converting the soil in the actual excavation and support process using the m-method.

[0042] Optionally, using similarity theory in model simulation, for the actual excavation scenario of the foundation pit simulation, the similarity dimension ratio between the actual excavation scenario and the simulated foundation pit excavation is determined, and the soil in the actual excavation scenario is determined. The soil during the excavation and support process is converted into an equivalent soil spring. Based on the similarity dimension ratio and the static earth pressure, the stress ratio between the foundation pit excavation and support in the actual excavation scenario and the simulation model is kept at 1. The static load of the foundation pit is calculated and determined, and the active earth pressure and passive earth pressure are simulated using spring loads. During the spring load simulation process, corresponding loads are applied to the springs. When the applied load is detected to reach the load simulating the active earth pressure, it is determined to be the foundation pit excavation load during foundation pit simulation. When the applied load is detected to reach the load simulating the passive earth pressure, it is determined to be the foundation pit support load during foundation pit simulation. Specifically, when the shrinkage of the spring is detected by the detection equipment to be equal to the preset shrinkage of the passive earth pressure and / or the active earth pressure, it is determined that the load applied to the spring can simulate the active earth pressure and / or the passive earth pressure.

[0043] S120. Obtain the deformation range of the foundation pit in the foundation pit excavation and support simulation, and determine the simulated retaining structure of the foundation pit based on the foundation pit deformation range.

[0044] Among them, the foundation pit deformation can be the displacement of the foundation pit retaining structure under the action of internal and external pressure differences during the actual foundation pit excavation and support process; the foundation pit deformation range can be the deformation control of the foundation pit retaining structure during different foundation pit excavations according to the requirements of the foundation pit excavation specifications. The foundation pit deformation range can be used to stabilize the foundation pit during the foundation pit excavation and support process.

[0045] The simulated retaining structure can be a device used to simulate the retaining structure of a foundation pit during the indoor simulation of foundation pit excavation and support. The simulated retaining structure can meet the requirements of dynamic elastic change during the simulated foundation pit load process, while also satisfying the need for visual monitoring. For example, the simulated retaining structure can use deformable thin plates of appropriate material type and thickness according to the simulated foundation pit load.

[0046] Specifically, the construction specifications for the foundation pit excavation and support project are obtained, the deformation range of the foundation pit in the simulated actual excavation is determined, and a simulated retaining structure that conforms to the deformation range of the foundation pit is determined based on similarity theory.

[0047] Optionally, in another optional embodiment of the present invention, determining the simulated retaining structure for the foundation pit simulation based on the deformation range of the foundation pit includes:

[0048] Deformation simulation calculations were performed on multiple foundation pit retaining structures based on plate and shell theory.

[0049] If the foundation pit retaining structure meets the deformation range of the foundation pit, the foundation pit retaining structure is determined as the simulated retaining structure for foundation pit simulation.

[0050] Among them, plate and shell theory can be a simplified engineering theory that applies the basic theory of elasticity to plate and shell structures.

[0051] The foundation pit retaining structure can be a pre-set set of multiple deformable thin plates of different materials and thicknesses. The retaining structure can undergo corresponding elastic deformation according to the applied load. It should be noted that during the foundation pit excavation and support simulation, loads will be applied to the simulated retaining structure, requiring it to meet the load requirements and exhibit significant elastic deformation within the specified range. Therefore, trial calculations of the material and thickness of the retaining structure are necessary to determine the optimal structure for the simulation experiment.

[0052] Specifically, the deformation range of the foundation pit is obtained for the simulated foundation pit excavation and support. Based on the plate and shell theory, deformation simulation calculations are performed on multiple foundation pit retaining structures with different materials and thicknesses to determine whether the foundation pit retaining structure meets the foundation pit deformation range. The foundation pit retaining structure that meets the foundation pit deformation range is used as the simulated retaining structure for foundation pit simulation.

[0053] S130. Based on the simulated retaining structure and the simulated load of the foundation pit, the deformation process of the simulated retaining structure is determined.

[0054] The deformation process can simulate the elastic deformation of the retaining structure under simulated loads from the foundation pit. This deformation process can be used to simulate the support capacity of the retaining structure during foundation pit excavation and support.

[0055] Optionally, before simulating the excavation and support of the foundation pit, corresponding constraints are applied to the simulated retaining structure according to the type of retaining structure and geological environment set in the actual excavation scenario, so as to conform to the retaining structure and geological environment in the actual excavation scenario.

[0056] Specifically, during the simulated foundation pit excavation and support process, loads are applied to the simulated retaining structure according to the simulated foundation pit load, and the elastic deformation of the simulated fence structure is observed. In the fence support stage of foundation pit excavation and support, the simulated fence structure is supported, and the deformation recovery process of the simulated fence structure during the support process is continued to be observed.

[0057] Optionally, in another optional embodiment of the present invention, the simulated load of the foundation pit includes the static load of the foundation pit; before determining the deformation process of the simulated retaining structure based on the simulated retaining structure and the simulated load of the foundation pit during the excavation and support process, the method further includes:

[0058] The initial state of the foundation pit is simulated based on the static load of the foundation pit and the simulated retaining structure; wherein, the initial state of the foundation pit is the state in which the foundation pit has not been excavated.

[0059] Specifically, in simulating the excavation and support of the foundation pit, according to the excavation and support process, before the excavation of the foundation pit begins, the corresponding load is applied to the simulated retaining structure based on the static load of the foundation pit, so as to simulate the initial state of the foundation pit before the excavation begins.

[0060] The technical solution of this invention obtains simulated excavation and support information for a simulated foundation pit, determines the simulated load on the foundation pit based on this information, and determines the load on the simulated foundation pit by defining the scenario of the foundation pit excavation and support simulation and the actual excavation data. This ensures the simulation closely matches the experimental scenario and improves the accuracy of the experiment. Furthermore, the invention obtains the deformation range of the foundation pit in the simulated excavation and support, determines the simulated retaining structure based on this deformation range, and selects the strength and materials of the simulated retaining structure based on real-time excavation data to meet the simulation requirements and prevent simulation deviations. Based on the simulated retaining structure and the simulated load of the foundation pit, the deformation process of the simulated retaining structure is determined. By simulating the load and the retaining structure, the entire foundation pit excavation and support process is simulated, and the response and dynamic changes of the retaining structure during the entire load loading process are determined. This can reflect the dynamic process of foundation pit deformation control during foundation pit excavation and support, solving the technical problem that existing technologies cannot simulate the dynamic response process of foundation pit retaining structures. It realizes the dynamic mechanical response of the strata and retaining structure during foundation pit excavation and support, and automatically evaluates the feasibility and stability of the control algorithm during the simulation process.

[0061] Example 2

[0062] Figure 2 This is a flowchart of another simulation method for a foundation pit retaining structure provided in Embodiment 2 of the present invention. The relationship between this embodiment and the above embodiments is that this is a specific method for controlling the simulated load of the foundation pit and simulating the excavation and support process of the foundation pit retaining structure. Figure 2 As shown, the simulation method for the foundation pit retaining structure includes:

[0063] S210. Obtain the simulated excavation support information of the simulated foundation pit, and determine the simulated foundation pit load based on the simulated excavation support information.

[0064] S220. Obtain the deformation range of the foundation pit in the foundation pit excavation and support simulation, and determine the simulated retaining structure of the foundation pit based on the foundation pit deformation range.

[0065] S230. Control the simulated load of the foundation pit and the simulated retaining structure to simulate the foundation pit excavation process according to the preset control algorithm, and determine the deformation process of the foundation pit retaining structure during the foundation pit excavation process.

[0066] The control algorithm can be a pre-set algorithm used to control the application and removal of loads from the simulated foundation pit load on the simulated retaining structure. For example, the control algorithm can be a PID (proportion integration differentiation) control algorithm.

[0067] Optionally, the foundation pit excavation and support process includes the foundation pit excavation process and the foundation pit support process. For example, during the actual foundation pit excavation process, the soil around the foundation pit will exert active earth pressure on the foundation pit retaining structure due to the excavation, while during the foundation pit support process, the soil around the foundation pit will exert passive earth pressure on the foundation pit retaining structure.

[0068] Specifically, a static load is applied to the simulated retaining structure to simulate the static state of the excavation pit before excavation. At the start of the excavation simulation, a preset control algorithm applies a load to the simulated retaining structure based on the simulated excavation load, simulating the pressure exerted by the soil on the retaining structure during excavation. During the application of the load, the deformation process of the simulated retaining structure is observed in real time to determine the deformation process during excavation.

[0069] For example, when simulating the excavation and support process of a foundation pit, the static earth pressure when the foundation pit has not started to be simulated can be simulated by applying the same static load of the foundation pit to two corresponding directions of the simulated retaining structure. When the foundation pit starts to be excavated, the earth pressure exerted by the soil on the foundation pit retaining structure can be simulated by reducing the load in one direction, and the deformation process of the foundation pit retaining structure can be observed during the load reduction process.

[0070] Optionally, in another optional embodiment of the present invention, the simulated foundation pit load includes the foundation pit excavation load; the step of controlling the simulated foundation pit load and the simulated retaining structure to simulate the foundation pit excavation process according to a preset control algorithm, and determining the deformation process of the foundation pit retaining structure during the foundation pit excavation process, includes:

[0071] The preset control algorithm is switched from the pressure closed-loop control algorithm to the position closed-loop control algorithm;

[0072] Based on the location closed-loop control algorithm and the excavation load of the foundation pit, the excavation process of the foundation pit is simulated on the simulated retaining structure to determine the deformation process of the foundation pit retaining structure during the excavation process.

[0073] Among them, the pressure closed-loop control algorithm can be a control algorithm that controls the applied load on the simulated enclosure structure to remain unchanged.

[0074] Among them, the position closed-loop control algorithm can be a control algorithm that controls the application position of the load applied to the simulated enclosure structure to remain unchanged.

[0075] Optionally, pressure closed-loop control algorithms and position closed-loop control algorithms can be used to simulate the excavation and support process of a foundation pit.

[0076] Specifically, in the simulated foundation pit excavation process, a pressure closed-loop control algorithm is used to ensure that the simulated excavation process matches the actual foundation pit excavation scenario. Excavation loads are applied to the simulated retaining structure to simulate the earth pressure exerted on the retaining structure during actual excavation. The pressure closed-loop control algorithm is then switched to a position closed-loop control algorithm. By applying excavation loads to the simulated retaining structure, the active earth pressure exerted by the soil on the simulated retaining structure when the soil reaches an active limit equilibrium state and a sliding surface appears during the actual excavation process is simulated. During the application of excavation loads to the simulated retaining structure, the deformation process of the simulated retaining structure is observed in real time to determine the deformation process of the foundation pit retaining structure during excavation.

[0077] S240. Control the simulated load of the foundation pit and the simulated retaining structure to simulate the foundation pit support process according to the preset control algorithm, and determine the deformation process of the foundation pit retaining structure during the foundation pit support process.

[0078] Specifically, after simulating the excavation and support process of the foundation pit, the simulated retaining structure undergoes elastic deformation and is subjected to active earth pressure simulated by a position closed-loop control algorithm. The simulated retaining structure is in equilibrium. By supporting the simulated retaining structure, a load is applied to it based on a preset control algorithm according to the simulated load of the foundation pit, simulating the pressure exerted by the retaining structure on the soil during foundation pit support. While applying the support load to the simulated retaining structure, the deformation process of the simulated retaining structure is observed in real time to determine the deformation process of the foundation pit retaining structure during foundation pit support.

[0079] Optionally, in another optional embodiment of the present invention, the simulated foundation pit load includes the foundation pit support load; the step of controlling the simulated foundation pit load and the simulated retaining structure according to a preset control algorithm to simulate the foundation pit support process, and determining the deformation process of the foundation pit retaining structure during the foundation pit support process, includes:

[0080] The preset control algorithm is switched from the position closed-loop control algorithm to the pressure closed-loop control algorithm; the foundation pit support process is simulated on the simulated retaining structure according to the pressure closed-loop control algorithm and the foundation pit support load, and the deformation process of the foundation pit retaining structure during the foundation pit support process is determined.

[0081] Specifically, in the simulated foundation pit support process, a position closed-loop control algorithm is used to ensure that the simulated process conforms to the actual foundation pit support scenario. Foundation pit support loads are applied to the simulated retaining structure to simulate the soil pressure exerted by the soil when the retaining structure is supported in the actual scenario. The position closed-loop control algorithm is then switched to a pressure closed-loop control algorithm. By applying foundation pit support loads to the simulated retaining structure, the passive soil pressure exerted by the soil on the simulated retaining structure when the soil reaches a passive limit equilibrium state and a sliding surface appears during the simulated support process is achieved. During the application of foundation pit support loads to the simulated retaining structure, the deformation process of the simulated retaining structure is observed in real time to determine the deformation process of the foundation pit retaining structure during foundation pit support.

[0082] The technical solution of this invention involves obtaining simulated excavation and support information for a simulated foundation pit, determining the simulated load of the foundation pit based on the simulated excavation and support information; obtaining the deformation range of the foundation pit during the simulated excavation and support, determining the simulated retaining structure of the foundation pit based on the deformation range; controlling the simulated load and the simulated retaining structure to simulate the foundation pit excavation process according to a preset control algorithm, and determining the deformation process of the retaining structure during the foundation pit excavation process; and / or, controlling the simulated load and the simulated retaining structure to simulate the foundation pit support process according to a preset control algorithm, and determining the deformation process of the retaining structure during the foundation pit support process. Based on a preset control algorithm, the entire excavation and support process of the foundation pit is simulated. Different loads are applied according to different stages of foundation pit excavation and support, and simulation control is performed through different control algorithms. The response and dynamic changes of the retaining structure are observed, which can reflect the dynamic process of foundation pit deformation control during foundation pit excavation and support. This solves the technical problem that existing technologies cannot simulate the dynamic response process of foundation pit retaining structures, realizes the dynamic mechanical response of the strata and retaining structure during foundation pit excavation and support, and automatically evaluates the feasibility and stability of the control algorithm during the simulation process.

[0083] Optionally, another simulation method for foundation pit retaining structure provided in this embodiment of the invention includes:

[0084] S1. Based on the actual excavation depth of the foundation pit to be simulated and the simulated indoor environment of the foundation pit excavation, confirm the similarity ratio between the actual excavated foundation pit and the simulated excavated foundation pit.

[0085] S2. Determine the static earth pressure based on the actual geological environment of the excavated foundation pit, and confirm the load through static earth pressure calculation.

[0086] S3. Based on the characteristic parameters of the soil in the actual excavation environment, calculate the active earth pressure and passive earth pressure during the corresponding foundation pit excavation and support process according to Rankine's earth pressure theory.

[0087] S4. Based on the characteristic parameters of the soil in the actual excavation environment, the stiffness of the equivalent soil spring is calculated using the m-method.

[0088] S5. Based on similarity theory, determine that the stress ratio between the simulated model test and the actual excavation test should be kept at 1, perform spring load similarity verification, and determine the static load of the foundation pit.

[0089] S6. Based on the deformation range of the foundation pit as required by the specifications, and combined with the effect of visual dynamic monitoring, clarify the deformation range of the foundation pit model.

[0090] S7 Figure 3 This is a schematic diagram of a simulation device for a foundation pit retaining structure provided in an embodiment of the present invention. Figure 3 As shown: In an indoor simulated environment, loads are applied to the simulation device, and various constraints can be added to the bottom of the thin-plate structure based on the retaining structure and geological survey in the actual excavation scenario. The elastically deformable thin plate can be used as a simulated retaining structure, with corresponding load loading modules on both sides of the plate. These load loading modules include row loading modules and column loading modules.

[0091] S8. Based on plate and shell theory, perform deformation calculations of elastically deformable thin plates to confirm the material type and thickness of the elastically deformable thin plates and determine whether the elastically deformable thin plates used in the simulation meet the deformation range of the foundation pit.

[0092] S9. Based on the PID control algorithm, position closed-loop control and pressure closed-loop control are achieved through position closed-loop control algorithm and pressure closed-loop control algorithm. Combined with the foundation pit deformation control theory, autonomous control of foundation pit deformation is achieved, and compensation and dynamic monitoring of elastic deformation thin plate deformation are realized.

[0093] For example, in an embodiment of the present invention, it is possible to Figure 3 The load loading module utilizes a miniature high-precision servo electric cylinder with guide, a miniature high-precision stepper electric cylinder with rotary encoder, linear and nonlinear springs, a high-precision miniature force sensor, and an axial force support rod to conduct simulation experiments and obtain compensation and dynamic monitoring of the deformation of the elastically deformable thin plate. Specifically, the dynamic monitoring algorithm can be exemplified as follows: Example 1: Record the pushing distance of the electric cylinder based on the high-precision encoder; record the high-precision encoder position when the load increases from 0; record the encoder position change based on the load change of the force sensor; calculate the deformation of the elastically deformable thin plate based on the pitch and number of turns. Example 2: Calculation can be performed directly based on the load change of the force sensor and the relationship between spring deformation and load. For linear springs, calculation can be performed directly based on Hooke's Law. Example 3: Monitoring is performed using a high-precision 3D laser scanner and vision algorithms. Example 4: A high-precision non-contact displacement sensor is installed using a reciprocating slide rail structure.

[0094] S10 Figure 4 This is a simulation diagram illustrating the initial state of a foundation pit, as disclosed in an embodiment of the present invention. Figure 4 As shown: By using the matrix multi-point loading modules on both sides of the elastic deformable thin plate, static loads of the foundation pit are applied to both ends of the elastic deformable thin plate to simulate the initial state of the foundation pit under the initial state of the strata.

[0095] S11. Partially unload one side of the matrix multi-point loading module on both sides of the elastic deformable thin plate to simulate the state after the foundation pit is excavated.

[0096] S12. Partially support one side of the matrix multi-point loading module on both sides of the elastic deformable thin plate to simulate the state after the foundation pit is supported.

[0097] S13. By applying disturbances to the supporting opposite surface, the feasibility, stability, and robustness of the control algorithm can be further evaluated.

[0098] The technical solution of this invention can apply different loads according to different stages of foundation pit excavation and support, and simulate and control them through different control algorithms. It can observe the response and dynamic change process of the retaining structure, reflect the dynamic process of foundation pit deformation control in foundation pit excavation and support, solve the technical problem that the prior art cannot simulate the dynamic response process of foundation pit retaining structure, realize the dynamic mechanical response of strata and retaining structure in foundation pit excavation and support, and automatically evaluate the feasibility and stability of control algorithm in the simulation process.

[0099] Example 3

[0100] Figure 5 This is a schematic diagram of a simulation device for a foundation pit retaining structure provided in Embodiment 3 of the present invention. Figure 5 As shown, the device includes: a simulated load determination module 510, a retaining structure determination module 520, and a foundation pit excavation and support simulation module 530, wherein,

[0101] The simulated load determination module 510 is used to acquire simulated excavation support information of the simulated foundation pit excavation support, and determine the simulated foundation pit load based on the simulated excavation support information.

[0102] The retaining structure determination module 520 is used to obtain the deformation range of the foundation pit in the foundation pit excavation and support simulation, and to determine the simulated retaining structure of the foundation pit based on the foundation pit deformation range.

[0103] The foundation pit excavation and support simulation module 530 is used to determine the deformation process of the simulated retaining structure based on the simulated retaining structure and the simulated foundation pit load during the foundation pit excavation and support process.

[0104] The technical solution of this invention obtains simulated excavation and support information for a simulated foundation pit, determines the simulated load on the foundation pit based on this information, and determines the simulated load by defining the scenario of the foundation pit excavation and support simulation and the actual foundation pit excavation data. This ensures the simulation closely matches the experimental scenario and improves the accuracy of the experiment. Furthermore, the invention obtains the deformation range of the foundation pit in the simulation, determines the simulated retaining structure based on this range, and selects the strength and materials of the simulated retaining structure according to real-time excavation data to meet the simulation requirements and prevent simulation deviations. The simulation method is flawed. Based on the simulated retaining structure and the simulated load of the foundation pit, the deformation process of the simulated retaining structure is determined. By simulating the load and the retaining structure, the entire foundation pit excavation and support process is simulated, and the response and dynamic change process of the retaining structure during the entire load loading process is determined. This method can reflect the dynamic process of foundation pit deformation control during foundation pit excavation and support, solving the technical problem that existing technologies cannot simulate the dynamic response process of foundation pit retaining structures. It realizes the dynamic mechanical response of the strata and retaining structure during foundation pit excavation and support, and automatically evaluates the feasibility and stability of the control algorithm during the simulation process.

[0105] Optionally, the foundation pit excavation and support process includes a foundation pit excavation process and a foundation pit support process; the foundation pit excavation and support simulation module is specifically used for:

[0106] The simulated load on the foundation pit and the simulated retaining structure are controlled according to a preset control algorithm to simulate the foundation pit excavation process, thereby determining the deformation process of the foundation pit retaining structure during the excavation process; and / or,

[0107] The simulated load on the foundation pit and the simulated retaining structure are controlled according to a preset control algorithm to simulate the foundation pit support process, and the deformation process of the foundation pit retaining structure during the foundation pit support process is determined.

[0108] Optionally, the simulated load of the foundation pit includes the excavation load of the foundation pit; the foundation pit excavation and support simulation module is further used for:

[0109] The preset control algorithm is switched from the pressure closed-loop control algorithm to the position closed-loop control algorithm;

[0110] Based on the location closed-loop control algorithm and the excavation load of the foundation pit, the excavation process of the foundation pit is simulated on the simulated retaining structure to determine the deformation process of the foundation pit retaining structure during the excavation process.

[0111] Optionally, the simulated load of the foundation pit includes the foundation pit support load; the foundation pit excavation and support simulation module is further used for:

[0112] The preset control algorithm is switched from the position closed-loop control algorithm to the pressure closed-loop control algorithm;

[0113] Based on the pressure closed-loop control algorithm and the foundation pit support load, the foundation pit support process is simulated on the simulated retaining structure to determine the deformation process of the foundation pit retaining structure during the foundation pit support process.

[0114] Optionally, the simulated load of the foundation pit includes the static load of the foundation pit; the device further includes an initial simulation module for the foundation pit, which is used to simulate the initial state of the foundation pit based on the static load of the foundation pit and the simulated retaining structure; wherein, the initial state of the foundation pit is the state in which the foundation pit has not been excavated.

[0115] Optionally, the simulated excavation and support information includes at-rest earth pressure, passive earth pressure, and active earth pressure; the simulated load determination module is specifically used for:

[0116] Obtain the similarity dimension ratio and the stiffness of the equivalent soil spring in the foundation pit simulation, respectively;

[0117] The static load of the foundation pit is determined based on the similarity size ratio and the static earth pressure.

[0118] Based on the similar size ratio and the stiffness of the equivalent soil spring, spring load simulations are performed on the active earth pressure and the passive earth pressure to determine the excavation load corresponding to the active earth pressure and the support load corresponding to the passive earth pressure.

[0119] Optionally, the enclosure structure determination module is specifically used for:

[0120] Deformation simulation calculations were performed on multiple foundation pit retaining structures based on plate and shell theory.

[0121] If the foundation pit retaining structure meets the deformation range of the foundation pit, the foundation pit retaining structure is determined as the simulated retaining structure for foundation pit simulation.

[0122] The simulation device for foundation pit retaining structure provided in the embodiments of the present invention can execute the simulation method for foundation pit retaining structure provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0123] Example 4

[0124] Figure 6A schematic diagram of an electronic device 10 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0125] like Figure 6 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0126] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0127] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the simulation method for foundation pit retaining structures.

[0128] In some embodiments, the method for simulating the foundation pit retaining structure can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the method for simulating the foundation pit retaining structure described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the method for simulating the foundation pit retaining structure by any other suitable means (e.g., by means of firmware).

[0129] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0130] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0131] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0132] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0133] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0134] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0135] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0136] Example 5

[0137] This embodiment provides a computer-readable storage medium storing a computer program thereon. When executed by a processor, the program implements the steps of a simulation method for a foundation pit retaining structure as provided in any embodiment of the present invention. The method includes:

[0138] Obtain the simulated excavation and support information of the simulated foundation pit, and determine the simulated foundation pit load based on the simulated excavation and support information.

[0139] Obtain the deformation range of the foundation pit in the foundation pit excavation and support simulation, and determine the simulated retaining structure of the foundation pit based on the foundation pit deformation range;

[0140] Based on the simulated retaining structure and the simulated excavation and support process of the foundation pit under the simulated load, the deformation process of the simulated retaining structure is determined.

[0141] The computer storage medium of this invention can be any combination of one or more computer-readable media. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. For example, a computer-readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0142] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0143] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0144] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0145] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computing device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0146] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0147] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A simulation method for foundation pit retaining structure, characterized in that, include: Obtain the simulated excavation and support information of the simulated foundation pit, and determine the simulated foundation pit load based on the simulated excavation and support information. Obtain the deformation range of the foundation pit in the foundation pit excavation and support simulation, and determine the simulated retaining structure of the foundation pit based on the foundation pit deformation range; The deformation process of the simulated retaining structure is determined based on the simulated retaining structure and the simulated load of the foundation pit to simulate the excavation and support process of the foundation pit. The foundation pit excavation and support process includes a foundation pit excavation process and a foundation pit support process; the step of determining the deformation process of the simulated retaining structure based on the simulated retaining structure and the simulated foundation pit load during the foundation pit excavation and support process includes: The simulated load on the foundation pit includes the excavation load of the foundation pit; The preset control algorithm is switched from the pressure closed-loop control algorithm to the position closed-loop control algorithm; Based on the aforementioned position closed-loop control algorithm and the excavation load, the excavation process of the simulated retaining structure is simulated to determine the deformation process of the retaining structure during the excavation process; and / or, The simulated loads of the foundation pit include the foundation pit support loads; The preset control algorithm is switched from the position closed-loop control algorithm to the pressure closed-loop control algorithm; Based on the pressure closed-loop control algorithm and the foundation pit support load, the foundation pit support process is simulated on the simulated retaining structure to determine the deformation process of the foundation pit retaining structure during the foundation pit support process.

2. The method according to claim 1, characterized in that, The simulated load on the foundation pit includes the static load on the foundation pit; before determining the deformation process of the simulated retaining structure based on the simulated foundation pit excavation and support process and the simulated foundation pit load, the method further includes: The initial state of the foundation pit is simulated based on the static load of the foundation pit and the simulated retaining structure; wherein, the initial state of the foundation pit is the state before the foundation pit is constructed.

3. The method according to claim 1, characterized in that, The simulated excavation and support information includes at-rest earth pressure, passive earth pressure, and active earth pressure. The simulated load of the foundation pit is determined based on the simulated excavation and support information, including: Obtain the similarity dimension ratio and the stiffness of the equivalent soil spring in the foundation pit simulation, respectively; The static load of the foundation pit is determined based on the similar size ratio and the static earth pressure. Based on the similar size ratio and the stiffness of the equivalent soil spring, spring load simulations are performed on the active earth pressure and the passive earth pressure, respectively. During the spring load simulation process, the load that reaches the simulated active earth pressure is determined as the excavation load of the foundation pit, and the load that reaches the simulated passive earth pressure is determined as the foundation pit support load.

4. The method according to claim 1, characterized in that, The step of determining the simulated retaining structure for the foundation pit simulation based on the deformation range of the foundation pit includes: Deformation simulation calculations were performed on multiple foundation pit retaining structures based on plate and shell theory. If the foundation pit retaining structure meets the deformation range of the foundation pit, the foundation pit retaining structure is determined as the simulated retaining structure for foundation pit simulation.

5. A simulation device for foundation pit retaining structure, characterized in that, include: The simulated load determination module is used to acquire simulated excavation and support information of the simulated foundation pit excavation and support, and to determine the simulated foundation pit load based on the simulated excavation and support information. The retaining structure determination module is used to obtain the deformation range of the foundation pit in the foundation pit excavation and support simulation, and to determine the simulated retaining structure of the foundation pit based on the foundation pit deformation range. The foundation pit excavation and support simulation module is used to determine the deformation process of the simulated retaining structure based on the simulated retaining structure and the simulated foundation pit load during the foundation pit excavation and support process. The foundation pit excavation and support process includes a foundation pit excavation process and a foundation pit support process. The foundation pit excavation and support simulation module is specifically used for: simulating the foundation pit load, including the foundation pit excavation load; switching the preset control algorithm from a pressure closed-loop control algorithm to a position closed-loop control algorithm; simulating the foundation pit excavation process on the simulated retaining structure according to the position closed-loop control algorithm and the foundation pit excavation load, and determining the deformation process of the foundation pit retaining structure during the foundation pit excavation process; and / or, simulating the foundation pit load, including the foundation pit support load; switching the preset control algorithm from a position closed-loop control algorithm to a pressure closed-loop control algorithm; simulating the foundation pit support process on the simulated retaining structure according to the pressure closed-loop control algorithm and the foundation pit support load, and determining the deformation process of the foundation pit retaining structure during the foundation pit support process.

6. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the simulation method for the foundation pit retaining structure according to any one of claims 1-4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the simulation method for the foundation pit retaining structure according to any one of claims 1-4.

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