BIM (Building Information Modeling) optimization design method for rapid construction of small-curvature-radius shield tunnel

Abstract

The invention relates to the field of tunnel construction, in particular to a small-curvature-radius shield tunnel rapid construction BIM optimization design method which comprises the seven steps of S1, an early-stage preparation stage, S2, model establishment, S3, indoor testing, S4, numerical simulation, S5, result comparison, S6, BIM optimization design and S7, construction according to design. According to the method, comprehensive improvement of geological adaptability, pressure balance, structural safety, parameter accuracy, risk control and construction efficiency in the construction process is achieved, it is ensured that high-quality, high-efficiency and high-safety completion of tunnel engineering is achieved, the BIM technology and the small-curvature-radius shield tunnel are effectively combined to a certain extent, and the construction efficiency is improved. And the construction efficiency of the tunnel with the small curvature radius is improved.

Description

Technical Field

[0001] The present application relates to the field of tunnel construction, and in particular to a BIM optimization design method for rapid construction of a shield tunnel with a small curvature radius. Background Art

[0002] At present, with the development of technology and the increase in engineering construction needs, the requirements for tunnel construction are indeed becoming more and more stringent, and the technical challenges encountered are also increasing. China has made remarkable achievements in tunnel construction. Not only has it become the country with the most tunnels in the world in terms of quantity, but it has also reached the world's leading level in construction technology and construction methods. In the process of tunnel construction, there will be many challenges, including complex and changeable geological conditions, the difficulty of building extra-long tunnels, the technical difficulties of deep-buried long tunnels, and the technical challenges of tunnel construction with a small curvature radius. These are all problems that will be encountered in the process of tunnel construction in my country.

[0003] Among them, a small curvature radius tunnel refers to a tunnel designed with a smaller turning radius in underground projects such as subways and water conservancy projects, which usually makes the construction process more complicated and challenging. Small curvature radius tunnels may encounter some specific technical difficulties during construction, such as high stratum strength and small turning radius, all of which may increase the difficulty of construction. With the development of technology, traditional construction methods have been difficult to meet the requirements of small curvature radius tunnels in related technologies. Related technologies use a combination of BIM technology to improve the construction speed of small curvature radius tunnels. This can effectively utilize the advantages of BIM technology in three-dimensional visualization, collaborative work, conflict detection, cost estimation and control, construction simulation, facility management, etc., and thus realize the effective application of BIM technology in tunnel construction.

[0004] Among the above-mentioned related technologies, although the application of BIM technology in tunnel construction has been realized, how to apply BIM technology to tunnels with small curvature radius and using shield technology, there has been no better way to effectively combine BIM technology with small curvature radius shield tunnels. Summary of the invention

[0005] In order to effectively combine BIM technology with small curvature radius shield tunnels, thereby improving the construction efficiency of small curvature radius tunnels, the present application provides a BIM optimization design method for the rapid construction of small curvature radius shield tunnels.

[0006] The BIM optimization design method for rapid construction of a small curvature radius shield tunnel provided in this application adopts the following technical solutions: A BIM optimization design method for rapid construction of a small curvature radius shield tunnel includes the following steps: S1. Preliminary preparation stage: on-site geological survey, data collection and collation; S2. Model establishment: Establish an improved silo model for small radius curved shield tunnels, derive the calculation formula for the ultimate support force of the working face, and ensure the pressure balance of the shield excavation face; S3. Indoor test: Analyze the stress distribution and main causes of cracking of shield tunnel segments with small radius curves, and determine the excavation parameters and assembly scheme of small radius curve turning sections; S4, numerical simulation: perform numerical simulation according to the parameters in S3, and compare the simulation results with the test results in S3; S5, result comparison: compare the test results of S3 with the simulation results of S4; S6, BIM optimized design: Based on the comparison results of S5, use BIM to optimize the design; S7. Construction according to design: Construction is carried out according to the results optimized in S6.

[0007] By adopting the above technical scheme, the coherent steps of preliminary geological survey, model establishment, indoor testing, numerical simulation, result comparison, BIM optimization design to construction implementation have achieved a comprehensive improvement in geological adaptability, pressure balance, structural safety, parameter accuracy, risk control and construction efficiency during the construction process, ensuring the high quality, high efficiency and high safety of the tunnel project. This application has achieved an effective combination of BIM technology and small curvature radius shield tunnels to a certain extent, thereby improving the construction efficiency of small curvature radius tunnels.

[0008] Optionally, S2, model establishment, includes establishing an improved silo model of a small radius curved shield tunnel based on the limit equilibrium method, deriving a calculation formula for the ultimate support force of the working face, and comparing the example calculation results with the numerical simulation to explore the influence of groundwater level, internal friction angle and cohesion on the ultimate support force of the working face.

[0009] By adopting the above technical scheme, during the model establishment stage, through the application of the limit equilibrium method and the improved silo model, the calculation formula for the ultimate support force of the working face can be accurately derived. By comparing examples with numerical simulations, the specific influence of key geological parameters such as groundwater level, internal friction angle and cohesion on the ultimate support force of the working face is deeply discussed, providing more accurate theoretical support for construction safety.

[0010] Optionally, the S2, model establishment, also includes establishing a mechanical model of the segment lining structure near the shield tail during the construction period, and establishing a shell-spring model for structural analysis during the shield construction period.

[0011] By adopting the above technical solutions, the mechanical model of the segment lining structure near the shield tail during the construction period is established, and the shell-spring model is applied, a more detailed theoretical model is provided for the stability analysis of the structure during the shield construction period, which enhances the adaptability and reliability of the design method.

[0012] Optionally, the S3, indoor test, includes shield construction excavation speed, cutter head rotation speed, and control surface settlement parameters.

[0013] By adopting the above technical solution, the key excavation parameters of shield construction, such as excavation speed, cutterhead speed and parameters for controlling surface settlement, are analyzed, which provides an experimental basis for parameter selection and adjustment during the construction process, ensuring the controllability and efficiency of the construction process.

[0014] Optionally, the parameters in S4 and numerical simulation are consistent with the parameter settings in S3, and the parameters include shield construction excavation speed, cutterhead rotation speed, and parameters for controlling surface settlement.

[0015] By adopting the above technical solution, the consistency of simulation parameters and indoor test parameters is ensured, the accuracy and practicality of simulation results are improved, and strong data support is provided for the final determination of construction parameters.

[0016] Optionally, the S5, result comparison, includes focusing on comparing the convergence deformation in the tunnels in S3 and S4 based on the data of S3 and S4, and evaluating the stability of the small radius tunnel.

[0017] By adopting the above technical solutions, the detailed comparison of test results and simulation results, especially the comparison of convergence deformation and stability evaluation in the tunnel, provides more comprehensive and in-depth technical support for risk assessment and decision-making during the construction process.

[0018] Optionally, the S6 and BIM optimization design include using the Revit platform to develop a three-dimensional reinforcement program for shield segments to achieve rapid reinforcement of shield segments.

[0019] By adopting the above technical solutions, applying the Revit platform and developing a three-dimensional reinforcement program for shield segments, the automation and precision of shield segment reinforcement design have been achieved, significantly improving design efficiency and construction quality.

[0020] Optionally, the rapid reinforcement includes one-click reinforcement and batch reinforcement.

[0021] By adopting the above technical solutions, one-click reinforcement and batch reinforcement are realized, which greatly simplifies the operation process of designers, reduces human errors, and improves the standardization and batch level of design work.

[0022] Optionally, the S6 and BIM optimization design include using the Revit platform to establish a detailed model of the shield segment and develop a tunnel shield segment layout program.

[0023] By adopting the above technical solutions, the development of the detailed model of the shield segment and the layout program of the tunnel shield segment established on the Revit platform has realized the automation and precision of the segment layout, providing more efficient and accurate technical support for the installation of the segment during the construction process.

[0024] Optionally, the typesetting program can realize rapid typesetting of shield segments and curve fitting correction.

[0025] By adopting the above technical solution, the accurate installation and curve fitting of the segments in the construction of tunnels with a small curvature radius are ensured, the construction errors are effectively controlled, and the overall quality of the tunnel and the accuracy of construction are improved.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the setting of seven steps, namely S1, preliminary preparation stage, S2, model establishment, S3, indoor test, S4, numerical simulation, S5, result comparison, S6, BIM optimization design, and S7, construction according to design, the geological adaptability, pressure balance, structural safety, parameter accuracy, risk control and construction efficiency in the construction process are comprehensively improved, ensuring the high quality, high efficiency and high safety of the tunnel project. This application has achieved the effective combination of BIM technology and small curvature radius shield tunnels to a certain extent, thereby improving the construction efficiency of small curvature radius tunnels; 2. In the model building stage, through the application of the limit equilibrium method and the improved silo model, the calculation formula of the ultimate support force of the working face can be accurately derived. By comparing the actual case with the numerical simulation, the specific influence of key geological parameters such as groundwater level, internal friction angle and cohesion on the ultimate support force of the working face is deeply discussed, providing more accurate theoretical support for construction safety; 3. The application of Revit platform and the development of 3D reinforcement program for shield segments have realized the automation and precision of shield segment reinforcement design, significantly improving design efficiency and construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a method flow chart of a BIM optimization design method for rapid construction of a shield tunnel with a small curvature radius in Example 1 of the present application.

[0028] Figure 2 This is a flow chart of the segment assembly process in Example 2 of the present application. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-2This application is described in further detail.

[0030] The embodiment of the present application discloses a BIM optimization design method for rapid construction of a shield tunnel with a small curvature radius.

[0031] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] Example 1 Reference Figure 1 ,A BIM optimization design method for rapid construction of a small curvature radius shield tunnel includes the following steps: S1. Preliminary preparation stage: on-site geological survey, data collection and collation.

[0033] Specifically, regarding the S1 stage, the geological survey work includes regional geological reports, historical construction data, hydrogeological data, etc., in order to understand the stratigraphic structure, rock mechanical properties, groundwater conditions, etc. At the same time, it is also necessary to conduct on-site exploration, field visits to the construction site, observe the topography, surface features, vegetation conditions, and existing buildings and underground facilities that may affect the construction. Furthermore, geotechnical tests are required to conduct geotechnical tests on the geological samples obtained to determine their density, water content, particle size distribution, compressibility, shear strength and other indicators.

[0034] It should be noted that in the embodiments of the present application, S1, the preliminary preparation stage, is not limited to the above-mentioned work, but may also include groundwater monitoring, environmental impact assessment, existing facilities investigation, risk assessment, regulatory standards review, stakeholder communication, etc., which are all work that needs to be done in the embodiments of the present application. These are relatively routine work for technical personnel in this field, and therefore cannot be used as a limitation on the present application.

[0035] S2. Model establishment: Establish an improved silo model for small radius curved shield tunnels, derive the calculation formula for the ultimate support force of the working face, and ensure the pressure balance of the shield excavation face.

[0036] Specifically, regarding the S2 stage, in the embodiments of the present application, there is a lot of work to be done. Generally speaking, it includes tunnel geometry design, material property analysis, improved silo model construction, support structure design, working face limit support calculation, stability assessment, etc. This is relatively common knowledge to those skilled in the art, so it will not be described one by one in the embodiments of the present application.

[0037] Furthermore, S2, model building, includes building an improved silo model of small radius curved shield tunnel based on the limit equilibrium method, deriving the calculation formula of the ultimate support force of the working face, and comparing the actual calculation results with the numerical simulation to explore the influence of groundwater level, internal friction angle and cohesion on the ultimate support force of the working face.

[0038] During the model establishment stage, through the application of the limit equilibrium method and the improved silo model, the calculation formula for the ultimate support force of the working face can be accurately derived. By comparing examples with numerical simulations, the specific influence of key geological parameters such as groundwater level, internal friction angle and cohesion on the ultimate support force of the working face is deeply discussed, providing more accurate theoretical support for construction safety.

[0039] Furthermore, S2, model establishment, also includes the establishment of a mechanical model of the segment lining structure near the shield tail during the construction period, and the establishment of a shell-spring model for structural analysis during the shield construction period.

[0040] The establishment of the mechanical model of the segment lining structure near the shield tail during the construction period and the application of the shell-spring model provide a more detailed theoretical model for the stability analysis of the shield structure during construction, and enhance the adaptability and reliability of the design method.

[0041] S3. Indoor test: Analyze the stress distribution and main causes of cracking of shield tunnel segments with small radius curves, and determine the excavation parameters and assembly plan for small radius curve turning sections.

[0042] Specifically, regarding the S3 stage, the embodiments of the present application provide comprehensive data support and scientific basis for the precise setting of construction parameters and the final determination of the construction plan by conducting mechanical property tests on segment materials, numerical simulation of stress distribution, in-depth analysis of cracking causes, optimization research on excavation parameters, design of segment assembly schemes, optimization of support structures, indoor simulation tests of construction processes, assessment of the impact of surface settlement, mechanical property tests on segment connection methods, assessment of construction safety risks, comprehensive analysis of test data, and engineering verification of test results.

[0043] Furthermore, S3, indoor tests, include shield construction excavation speed, cutterhead speed, and control of surface settlement parameters.

[0044] The analysis of key excavation parameters of shield construction, such as excavation speed, cutterhead speed and parameters for controlling surface settlement, provides an experimental basis for parameter selection and adjustment during the construction process, ensuring the controllability and efficiency of the construction process.

[0045] S4, numerical simulation: perform numerical simulation according to the parameters in S3, and compare the simulation results with the experimental results of S3.

[0046] Here we need to explain the S4 step. The numerical simulation work in the S4 stage involves establishing a detailed numerical model based on the indoor test parameters of S3, selecting an appropriate calculation method to simulate the construction process, inputting key construction parameters, analyzing responses such as stress, displacement and settlement, comparing simulation and test results to verify model accuracy, calibrating the model, evaluating parameter sensitivity, optimizing the construction plan, predicting construction risks, and compiling a simulation report, thereby ensuring the scientific nature and safety of the construction plan and providing solid data support for BIM optimization design.

[0047] Furthermore, the parameters in S4 and numerical simulation are consistent with the parameter settings in S3, and the parameters include shield construction excavation speed, cutterhead speed, and control surface settlement parameters.

[0048] The consistency between simulation parameters and indoor test parameters is ensured, the accuracy and practicality of simulation results are improved, and strong data support is provided for the final determination of construction parameters.

[0049] S5. Result comparison: Compare the test results of S3 with the simulation results of S4.

[0050] Specifically, regarding the S5 stage, the result comparison work involves the systematic organization and detailed analysis of the S3 indoor test and S4 numerical simulation data, quantitatively comparing the test and simulation results of key construction indicators, evaluating the deviation between the two, exploring the causes of the differences, proposing suggestions for model calibration and construction parameter adjustment, re-evaluating risks, and compiling a comparison report to support the final decision of the construction plan. In addition, it also includes converting the comparison results into knowledge accumulation, communication and coordination, ensuring the optimization of the construction plan and minimization of risks, thereby providing a scientific and accurate basis for the smooth implementation of tunnel construction.

[0051] Furthermore, S5, the comparison of results, including the data based on S3 and S4, focuses on comparing the convergence deformation in the tunnels in S3 and S4, and evaluates the stability of the small radius tunnel.

[0052] The detailed comparison of test results and simulation results, especially the comparison of convergence deformation and stability evaluation in the tunnel, provides more comprehensive and in-depth technical support for risk assessment and decision-making during the construction process.

[0053] S6. BIM optimized design: Based on the comparison results of S5, use BIM to optimize the design.

[0054] Specifically, regarding step S6, it mainly involves in-depth analysis of the comparison results of stage S5, using BIM software to accurately adjust the geometric design, lining structure and material properties of the tunnel, optimizing the construction process and schedule to improve construction efficiency, re-evaluating the structural performance to ensure safety, predicting and solving problems that may arise during construction through three-dimensional construction simulation, and fine-tuning the management of materials and resources to reduce costs and waste. Update relevant construction drawings and technical documents to ensure the accuracy of information, establish a dynamic design and construction feedback mechanism to promote continuous improvement, communicate effectively with all project participants to ensure that the optimization measures are understood and implemented, and provide the construction team with detailed training on the optimization design content, so as to ensure the smooth progress of the construction process and the achievement of project goals.

[0055] Furthermore, S6 and BIM optimization design include the use of Revit platform to develop a three-dimensional reinforcement program for shield segments to achieve rapid reinforcement of shield segments.

[0056] The application of the Revit platform and the development of a three-dimensional reinforcement program for shield segments have realized the automation and precision of shield segment reinforcement design, significantly improving design efficiency and construction quality.

[0057] Among them, rapid reinforcement includes one-click reinforcement and batch reinforcement.

[0058] The implementation of one-click reinforcement and batch reinforcement has greatly simplified the operating procedures of designers, reduced human errors, and improved the standardization and batch level of design work.

[0059] Going further, S6 and BIM optimized design include using the Revit platform to build detailed models of shield segments and develop a tunnel shield segment layout program.

[0060] The development of the detailed model of the shield segment and the tunnel shield segment layout program established on the Revit platform has realized the automation and precision of the segment layout, providing more efficient and accurate technical support for the segment installation during the construction process.

[0061] Among them, the typesetting program can realize rapid typesetting of shield segments and curve fitting correction.

[0062] It ensures the precise installation and curve fitting of the segments in the construction of tunnels with small curvature radius, effectively controls the construction errors, and improves the overall quality of the tunnel and the accuracy of construction.

[0063] S7. Construction according to design: Construction is carried out according to the results optimized in S6.

[0064] Specifically, regarding the S7 stage, in the embodiments of the present application, the work to be done includes but is not limited to construction preparation, construction plan implementation, construction monitoring, quality control, safety management, environmental monitoring, progress management, cost control, change management, communication and coordination, document recording, completion acceptance, etc., which are relatively well known to those skilled in the art, so they are not described in detail in the embodiments of the present application. It should be noted that the above-mentioned work needs to be carried out with the design results optimized in S6.

[0065] The implementation principle of a BIM optimization design method for rapid construction of a small curvature radius shield tunnel in Example 1 of the present application is: through the setting of seven steps, namely S1, preliminary preparation stage, S2, model establishment, S3, indoor test, S4, numerical simulation, S5, result comparison, S6, BIM optimization design, and S7, construction according to design, it is possible to achieve a comprehensive improvement in geological adaptability, pressure balance, structural safety, parameter accuracy, risk control and construction efficiency during the construction process, ensuring the high quality, high efficiency and high safety of the tunnel project. The present application has achieved an effective combination of BIM technology and a small curvature radius shield tunnel to a certain extent, thereby improving the construction efficiency of a small curvature radius tunnel.

[0066] Example 2 Reference Figure 1 and Figure 2 The present application also provides an embodiment applied to a practical project, the specific contents are as follows: Through the optimization of the method provided in this application, the construction parameters for excavation in curved sections are clearly optimized.

[0067] Small curve radius shield starting technology The shield starting section, including the shield starting shaft, is all in a small radius curve section, where there are 6 negative ring segments. When installing the negative 6 rings of negative ring segments, first install a 2cm steel plate (or angle iron plus square wood) with a height of 70mm and a length of 1800mm on the shield shell, and wait for the shield machine to completely enter the tunnel. When the tunnel opening starts synchronous grouting, remove it to ensure that the shield machine can enter the site smoothly. In order to meet the starting requirements, this section uses the method of extracting and fitting the monitoring data to analyze the line, selects the secant starting scheme, and advances from the starting tunnel gate 10m before its center path along the inner chord of the tunnel design center line (it passes through the center line of the starting tunnel gate, and the maximum deviation from the tunnel design center line is 47mm). After the shield tail is separated from the base, the shield posture is gradually adjusted to make the shield advance along the tunnel design line, so that the shield machine passes through this section in the form of a secant line. When starting on a curve, the shield machine must be hinged through the tunnel gate water-stop curtain before its posture can be adjusted. The shield machine's posture should be 2-3 cm toward the turning direction.

[0068] Small curve radius excavation parameter control For the water-rich sand layer, the stratum is weakly bonded and highly permeable, the soil layer is prone to collapse, and the excavation deviates from the designed axis. The automatic guidance system and manual measurement are used to assist in shield posture monitoring to ensure that the deviation is within ±10mm. However, considering that the construction is located in the reinforced area and the soil is relatively hard, in order to control the axis and protect the cutterhead, the soil pressure is selected within 0.1MPa, and the advancement speed should not be too fast, and 1.0cm / min is selected. Finally, during the excavation process, the shield machine jack cylinder stroke difference is controlled within 40mm, and the shield tail gap is controlled between 55-75, so that the segment is well stressed. At the same time, a synchronous grouting slurry with a short initial setting time is used, and double-liquid slurry is used every 10 rings to form a hoop to stabilize the formed tunnel and reduce the displacement of the formed segment.

[0069] Adjust the length of the segment for small curve radius Through segment forming and assembly and curve segment stress and excavation tests, the original segment length of the turning section was 1.5 meters. The excavation volume was reasonably controlled according to the structural gap between the shield and the segment and the characteristics of each soil layer. Based on the segment stress and ground settlement control considerations, it was finally determined that the segment length at the 350m turning point was 1.2m; secondly, when the shield machine advanced to the transition curve, the advancement speed test was adjusted from 20-35 (mm / min) to 5-15 (mm / min), and the shield machine's parameters of cutter head torque and total thrust were reduced from 2200-3000 (KN.m) and 17000-22000 (KN) to 600-900 (KN.m) and 7000-10000 (KN), respectively, which greatly improved the curve segment line control and segment assembly quality.

[0070] Through the use of this method, in an actual construction case, in one of the construction sections, the numerical simulation combined with BIM software segment assembly and similar excavation test solved the problems of large starting offset, poor segment assembly quality and easy damage in the curved section, reduced the damage rate of shield segments in the curved section, improved the construction quality of the shield tunnel, improved economic benefits, and saved a total of 5.6 million yuan in costs. At the same time, in this construction section, the force characteristics of the curved starting segment + numerical simulation combined with BIM software segment assembly research solved the engineering problems such as the difficulty in controlling the construction parameters of the curved shield tunnel, uneven force on the segments, easy misalignment and damage, and difficult axis correction, effectively solving the technical problem of uneven force on the curved shield segments, easy damage, and poor segment assembly quality, providing a new construction technology for shield segment construction. The damage rate of the curved shield segments was reduced, the assembly quality of the shield segments and the safety of the structure were improved, the construction quality of the shield tunnel was improved, the economic benefits were improved, and the cumulative cost savings were 12.8 million yuan.

[0071] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A BIM optimization design method for rapid construction of a small curvature radius shield tunnel, characterized in that: The following steps are involved: S1. Preliminary preparation stage: on-site geological survey, data collection and collation; S2. Model establishment: Establish an improved silo model for small radius curved shield tunnels, derive the calculation formula for the ultimate support force of the working face, and ensure the pressure balance of the shield excavation face; S3. Indoor test: Analyze the stress distribution and main causes of cracking of shield tunnel segments with small radius curves, and determine the excavation parameters and assembly scheme of small radius curve turning sections; S4, numerical simulation: perform numerical simulation according to the parameters in S3, and compare the simulation results with the test results in S3; S5, result comparison: compare the test results of S3 with the simulation results of S4; S6, BIM optimized design: Based on the comparison results of S5, use BIM to optimize the design; S7. Construction according to design: Construction is carried out according to the results optimized in S6.

2. According to claim 1, a BIM optimization design method for rapid construction of a small curvature radius shield tunnel is characterized in that: The S2, model establishment, includes establishing an improved silo model of a small radius curved shield tunnel based on the limit equilibrium method, deriving a calculation formula for the ultimate support force of the working face, and comparing the actual calculation results with the numerical simulation to explore the influence of groundwater level, internal friction angle and cohesion on the ultimate support force of the working face.

3. The BIM optimization design method for rapid construction of a small curvature radius shield tunnel according to claim 1 is characterized in that: The S2, model establishment, also includes establishing a mechanical model of the segment lining structure near the shield tail during the construction period, and establishing a shell-spring model for structural analysis during the shield construction period.

4. According to claim 1, a BIM optimization design method for rapid construction of a small curvature radius shield tunnel is characterized in that: The S3, indoor test, includes shield construction excavation speed, cutter head rotation speed, and control surface settlement parameters.

5. The BIM optimization design method for rapid construction of a small curvature radius shield tunnel according to claim 4 is characterized in that: The parameters in S4, the numerical simulation, are consistent with the parameter settings in S3, and the parameters include shield construction excavation speed, cutterhead rotation speed, and surface settlement control parameters.

6. The BIM optimization design method for rapid construction of a small curvature radius shield tunnel according to claim 1 is characterized in that: The S5, result comparison, includes data based on S3 and S4, focusing on comparing the convergence deformation in the tunnels of S3 and S4, and evaluating the stability of the small radius tunnel.

7. The BIM optimization design method for rapid construction of a small curvature radius shield tunnel according to claim 1 is characterized in that: The S6, BIM optimized design, includes using the Revit platform to develop a three-dimensional reinforcement program for shield segments to achieve rapid reinforcement of shield segments.

8. The BIM optimization design method for rapid construction of a small curvature radius shield tunnel according to claim 7 is characterized in that: The rapid reinforcement includes one-click reinforcement and batch reinforcement.

9. The BIM optimization design method for rapid construction of a small curvature radius shield tunnel according to claim 1 is characterized in that: The S6 and BIM optimization design include using the Revit platform to establish a detailed model of the shield segment and develop a tunnel shield segment layout program.

10. A BIM optimization design method for rapid construction of a small curvature radius shield tunnel according to claim 9, characterized in that: The typesetting program can realize fast typesetting of shield segments and curve fitting correction.

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