WO2022047970A1 - Bim-based method for simulated calculation of deep foundation pit before construction - Google Patents

Bim-based method for simulated calculation of deep foundation pit before construction Download PDF

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WO2022047970A1
WO2022047970A1 PCT/CN2020/125048 CN2020125048W WO2022047970A1 WO 2022047970 A1 WO2022047970 A1 WO 2022047970A1 CN 2020125048 W CN2020125048 W CN 2020125048W WO 2022047970 A1 WO2022047970 A1 WO 2022047970A1
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foundation pit
deep foundation
construction
software
bim
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徐亮
邵东升
吴佳
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浙江勤业建工集团有限公司
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  • the invention relates to the technical field of deep foundation pit construction, in particular to a BIM-based pre-construction deep foundation pit simulation calculation method.
  • BIM Building Information Modeling
  • the construction party mainly uses the three-dimensional visualization and virtual construction of BIM technology to control and supervise the progress and cost of the project, make the construction plan and technical disclosure more clear and detailed, and reduce errors and errors.
  • the emergence of vulnerabilities can improve the construction personnel's understanding of the excavation plan; the use of virtual construction to simulate the excavation plan, with the assistance of software, can accurately identify hidden problems in the implementation process of the plan, and optimize the excavation details. , so as to achieve the purpose of shortening the construction period and improving the efficiency; using the three-dimensional model can improve the accurate calculation of the engineering volume of earthwork excavation and backfilling, and achieve controllable costs and so on.
  • the above application has the following shortcomings: the 3D model established by the construction party is based on the drawings and data of the foundation pit enclosure given by the designer, which only plays the role of visualization of the 3D model, and does not perform mechanics on the supporting structure and geotechnical soil. Simulation calculation and analysis, the scheme optimization is only based on the construction period and the allocation of labor, machinery and materials, but not based on the overall dynamic force changes in the whole process of deep foundation pit construction. Based on this, this case was born.
  • the purpose of the present invention is to provide a BIM-based pre-construction deep foundation pit simulation calculation method, which simulates and calculates the overall dynamic force change in the whole process of the deep foundation pit construction, and provides technical and technical solutions for the optimization of the deep foundation pit construction scheme. data support.
  • a BIM-based pre-construction deep foundation pit simulation calculation method comprising the following steps:
  • step S3 also includes the following steps: using the deep foundation pit software to simulate and calculate the excavation working conditions according to the construction sequence, adjust and optimize the excavation section and layered working conditions according to the calculation results, and select the structural stress.
  • the smaller deformation is used as the excavation port, and the excavation plan is adjusted and optimized according to the calculation results.
  • step S3 also includes the following steps: according to the calculation result of the excavation condition, optimizing the layout of the monitoring points, focusing on strengthening the monitoring at the places where the displacement of the supporting structure is large in the simulation calculation.
  • the advantages of the present invention are: using BIM technology, three-dimensional modeling of geotechnical information and deep foundation pit supporting structure system, and using deep foundation pit calculation software to simulate force and displacement calculation of each working condition of foundation pit supporting structure , providing technical and data support for the optimization of the foundation pit construction plan, so that the displacement and settlement of the actual construction support structure are within the simulation calculation range, which speeds up the construction progress and ensures quality and safety.
  • the original most uncontrollable deep foundation pit construction has become everything under control.
  • Fig. 1 is the schematic flow sheet of the scheme of the present invention in the embodiment
  • FIG. 2 is a schematic diagram of a software interface for performing three-dimensional modeling of soil layer survey information in an embodiment
  • FIG. 3 is a schematic diagram of a software interface for modeling the deep foundation pit support structure system in the embodiment
  • FIG. 4 is a schematic diagram of a software interface for performing force calculation on a foundation pit enclosure design model in an embodiment
  • Fig. 5 is the software interface schematic diagram when the excavation working condition is simulated and calculated in the embodiment
  • FIG. 6 is a schematic diagram of a software interface for performing construction simulation in BIM software in an embodiment.
  • the present invention proposes a BIM-based pre-construction deep foundation pit simulation calculation method, as shown in Figure 1, including the following steps:
  • a deep foundation pit project is 88.5 meters long from north to south, 68.3 meters wide from east to west, -6.12 meters deep, and -7.2 meters in part.
  • the foundation pit is close to the red line of the land on the west side. Because of the high quality clay, the foundation pit construction has a greater risk of settlement and displacement of the surrounding environment.
  • the deep foundation pit project adopts the simulation calculation method of this embodiment before construction, which provides technical and data support for the optimization of the construction plan. The displacement and settlement of the actual construction support structure are within the simulation calculation range.
  • the BIM software used in this project includes Lizheng geotechnical software, Lizheng deep foundation pit software, and Pinming PBIM site layout software. Specifically include the following steps:
  • the generated 3D soil layer model is imported into Lizheng Deep Foundation Pit software, and the deep foundation pit support design is modeled on the basis of the soil layer model.
  • the foundation pit support of this project adopts SMW construction method piles inner support of steel pipe;
  • the simulation calculation of the excavation conditions is carried out according to the excavation progress, and the excavation plan is adjusted and optimized according to the calculation results. Focus on strengthening the detection, as shown in Figure 5, the software can see the deformation state of the support structure when the excavation depth is 3.05 meters. According to the excavation progress, the deformation state of the support structure at each depth node can be calculated to optimize the measure;
  • the adjusted and optimized deep foundation pit construction plan is simulated in Pinming Pbim software, and the simulation pre-construction is carried out in combination with the schedule, on-site construction organization, machinery, materials, and labor scheduling.

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Abstract

The present invention relates to a BIM-based method for simulated calculation of a deep foundation pit before construction. The method comprises: performing three-dimensional modeling on soil information of a deep foundation pit by means of geotechnical software; importing a three-dimensional soil model into deep foundation pit software; performing modeling on a deep foundation pit support structure on the basis of the soil model; performing stress calculation and structural deformation calculation on a deep foundation pit support structure model under different working conditions, and optimizing the subsection and sub-layer working conditions of foundation pit excavation, the soil discharge port arrangement, and the layout of monitoring points according to calculation results; and performing simulated pre-construction according to an optimized plan of deep foundation pit construction. The advantages of the method lie in: using BIM technology to perform three-dimensional modeling on soil information and a deep foundation pit support structure, and using deep foundation pit calculation software to calculate simulated displacement under stress under all working conditions of the foundation pit support structure provide technical and data support for the optimization of a foundation pit construction plan, such that the displacement and settlement of the support structure during actual construction are both within a simulated calculation range, thereby ensuring the quality and safety thereof, while also accelerating the construction progress.

Description

基于BIM的施工前深基坑模拟计算方法Simulation calculation method of deep foundation pit before construction based on BIM 技术领域technical field
本发明涉及深基坑施工技术领域，尤其涉及一种基于BIM的施工前深基坑模拟计算方法。The invention relates to the technical field of deep foundation pit construction, in particular to a BIM-based pre-construction deep foundation pit simulation calculation method.
背景技术Background technique
BIM(Building Informmation Modeling)的核心是以模型为载体，利用数字化技术，将建筑设计、施工、运行的各类物理数据和实际信息集成化，并三维的展示出来，从而为建筑工程项目的参建各方提供了一个信息交互的协同工作平台。The core of BIM (Building Information Modeling) is the model as the carrier, using digital technology to integrate various physical data and actual information of architectural design, construction and operation, and display it in three dimensions, so as to participate in the construction of construction projects. All parties provide a collaborative work platform for information exchange.
目前，在深基坑施工中，施工方主要利用BIM技术的三维可视化、虚拟施工等特点，使工程进度、成本得到控制和监管，使得施工方案、技术交底等更为清楚详细，减少了错误和漏洞的出现。例如，利用三维模型进行交底，可以提升施工人员对开挖方案的了解；利用虚拟施工对开挖方案进行模拟，在软件辅助下，可精确找出方案实施过程中隐藏的问题，优化开挖细节，从而达到缩短工期、提高效益的目的；利用三维模型，可以提高土石方开挖回填的工程量的精确计算，达到成本可控等等。At present, in the construction of deep foundation pits, the construction party mainly uses the three-dimensional visualization and virtual construction of BIM technology to control and supervise the progress and cost of the project, make the construction plan and technical disclosure more clear and detailed, and reduce errors and errors. The emergence of vulnerabilities. For example, the use of 3D models for disclosure can improve the construction personnel's understanding of the excavation plan; the use of virtual construction to simulate the excavation plan, with the assistance of software, can accurately identify hidden problems in the implementation process of the plan, and optimize the excavation details. , so as to achieve the purpose of shortening the construction period and improving the efficiency; using the three-dimensional model can improve the accurate calculation of the engineering volume of earthwork excavation and backfilling, and achieve controllable costs and so on.
但上述应用，存在着以下不足：施工方建立的三维模型是基于设计方给出的基坑围护图纸和数据，只起到三维模型可视化的作用，并未对支护结构和岩土进行力学模拟计算分析，方案优化也仅仅只是基于工期和劳动力、机械、材料的调配，并未基于深基坑施工全过程整体动态受力变化情况进行深层次施工优化，基于此，本案由此而生。However, the above application has the following shortcomings: the 3D model established by the construction party is based on the drawings and data of the foundation pit enclosure given by the designer, which only plays the role of visualization of the 3D model, and does not perform mechanics on the supporting structure and geotechnical soil. Simulation calculation and analysis, the scheme optimization is only based on the construction period and the allocation of labor, machinery and materials, but not based on the overall dynamic force changes in the whole process of deep foundation pit construction. Based on this, this case was born.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种基于BIM的施工前深基坑模拟计算方法，对深基坑施工全过程整体动态受力变化情况进行摸拟计算，为深基坑施工方案的优化提供了技术和数据支持。The purpose of the present invention is to provide a BIM-based pre-construction deep foundation pit simulation calculation method, which simulates and calculates the overall dynamic force change in the whole process of the deep foundation pit construction, and provides technical and technical solutions for the optimization of the deep foundation pit construction scheme. data support.
为了实现上述目的，本发明的技术方案如下：In order to achieve the above object, technical scheme of the present invention is as follows:
一种基于BIM的施工前深基坑模拟计算方法，包括以下步骤：A BIM-based pre-construction deep foundation pit simulation calculation method, comprising the following steps:
S1.通过岩土软件，对深基坑的土层勘测信息进行三维建模，得到三维土层模型；S1. Through the geotechnical software, three-dimensional modeling is performed on the soil layer survey information of the deep foundation pit, and a three-dimensional soil layer model is obtained;
S2.将三维土层模型导入深基坑软件，在三维土层模型基础上根据深基坑支护设计对深基坑支护结构体系进行建模，得到基坑支护结构设计模型；S2. Import the three-dimensional soil layer model into the deep foundation pit software, model the deep foundation pit support structure system based on the three-dimensional soil layer model according to the deep foundation pit support design, and obtain the foundation pit support structure design model;
S3.利用深基坑软件，对深基坑支护结构设计模型进行受力计算，计算得出深基坑支护结构的受力情况，以及在不同受力情况下的结构变形数据，并依据模拟计算结果进行施工优化；S3. Use the deep foundation pit software to calculate the force of the design model of the deep foundation pit supporting structure, and calculate the force of the deep foundation pit supporting structure, as well as the structural deformation data under different stress conditions. The simulation calculation results are used for construction optimization;
S4.将调整优化后的深基坑支护施工方案在BIM软件中进行施工模拟，结合现场施工组织方案，优化机械、材料、劳动力调度，进行摸拟预施工。S4. Carry out construction simulation in the BIM software for the adjusted and optimized deep foundation pit support construction plan, optimize the scheduling of machinery, materials, and labor in combination with the on-site construction organization plan, and conduct simulated pre-construction.
进一步的，所述步骤S3中还包括以下步骤：利用深基坑软件，按照施工顺序对挖土工况进行模拟计算，依据计算结果调整优化挖土分段分层工况，并选择结构受力变形较小处作为出土口，依据计算结果调整优化挖土方案。Further, the step S3 also includes the following steps: using the deep foundation pit software to simulate and calculate the excavation working conditions according to the construction sequence, adjust and optimize the excavation section and layered working conditions according to the calculation results, and select the structural stress. The smaller deformation is used as the excavation port, and the excavation plan is adjusted and optimized according to the calculation results.
进一步的，所述步骤S3中还包括以下步骤：依据挖土工况的计算结果，进行监测点布置优化，重点对模拟计算中支护结构位移较大处进行加强监测。Further, the step S3 also includes the following steps: according to the calculation result of the excavation condition, optimizing the layout of the monitoring points, focusing on strengthening the monitoring at the places where the displacement of the supporting structure is large in the simulation calculation.
本发明的优点在于：利用BIM技术，对岩土信息和深基坑支护结构体系进行三维建模，并利用深基坑计算软件进行基坑支护结构各工况摸拟受力、位移计算，为基坑施工方案优化提供了技术和数据支持，使得实际施工支护结构位移、沉降都在模拟计算范围之内，加快了施工进度的同时，确保了质量和安全。将原本最不可控的深基坑施工，变得一切尽在掌握。The advantages of the present invention are: using BIM technology, three-dimensional modeling of geotechnical information and deep foundation pit supporting structure system, and using deep foundation pit calculation software to simulate force and displacement calculation of each working condition of foundation pit supporting structure , providing technical and data support for the optimization of the foundation pit construction plan, so that the displacement and settlement of the actual construction support structure are within the simulation calculation range, which speeds up the construction progress and ensures quality and safety. The original most uncontrollable deep foundation pit construction has become everything under control.
附图说明Description of drawings
图1为实施例中本发明方案的流程示意图；Fig. 1 is the schematic flow sheet of the scheme of the present invention in the embodiment;
图2为实施例中将土层勘测信息进行三维建模的软件界面示意图；2 is a schematic diagram of a software interface for performing three-dimensional modeling of soil layer survey information in an embodiment;
图3为实施例中深基坑支护结构体系进行建模的软件界面示意图；3 is a schematic diagram of a software interface for modeling the deep foundation pit support structure system in the embodiment;
图4为实施例中对基坑围护设计模型进行受力计算的软件界面示意图；4 is a schematic diagram of a software interface for performing force calculation on a foundation pit enclosure design model in an embodiment;
图5为实施例中对挖土工况进行模拟计算时的软件界面示意图；Fig. 5 is the software interface schematic diagram when the excavation working condition is simulated and calculated in the embodiment;
图6为实施例中在BIM软件中进行施工模拟的软件界面示意图。FIG. 6 is a schematic diagram of a software interface for performing construction simulation in BIM software in an embodiment.
具体实施方式detailed description
以下结合实施例对本发明作进一步详细描述。The present invention will be described in further detail below with reference to the embodiments.
本发明提出一种基于BIM的施工前深基坑模拟计算方法，如图1所示，包括以下步骤：The present invention proposes a BIM-based pre-construction deep foundation pit simulation calculation method, as shown in Figure 1, including the following steps:
S1.通过岩土软件，对深基坑的土层勘测信息进行三维建模，得到三维土层模型；S1. Through the geotechnical software, three-dimensional modeling is performed on the soil layer survey information of the deep foundation pit, and a three-dimensional soil layer model is obtained;
S2.将三维土层模型导入深基坑软件，在三维土层模型基础上根据深基坑支护设计对深基坑支护结构体系进行建模，得到基坑支护结构设计模型；S2. Import the three-dimensional soil layer model into the deep foundation pit software, model the deep foundation pit support structure system based on the three-dimensional soil layer model according to the deep foundation pit support design, and obtain the foundation pit support structure design model;
S3.利用深基坑软件，对深基坑支护结构设计模型进行受力计算，按照施工顺序对各挖土工况进行模拟计算，计算得出深基坑支护结构在不同工况下的受力情况，以及在不同受力情况下的结构变形数据，依据计算结果调整优化基坑挖土分段分层工况，选择结构受力变形较小处作为出土口，并依据计算结果，进行监测点布置优化，重点对模拟计算中支护结构位移较 大处进行加强监测；S3. Use the deep foundation pit software to calculate the force of the design model of the deep foundation pit supporting structure, simulate and calculate the excavation conditions according to the construction sequence, and calculate the strength of the deep foundation pit supporting structure under different working conditions. The stress situation and the structural deformation data under different stress situations, adjust and optimize the sub-layered working conditions of the excavation of the foundation pit according to the calculation results, select the place with less stress and deformation of the structure as the excavation port, and carry out the calculation according to the calculation results. The layout of monitoring points is optimized, focusing on strengthening monitoring where the displacement of the supporting structure is large in the simulation calculation;
S4.将调整优化后的深基坑支护施工方案在BIM软件中进行施工模拟，结合现场施工组织方案，优化机械、材料、劳动力调度，进行摸拟预施工。S4. Carry out construction simulation in the BIM software for the adjusted and optimized deep foundation pit support construction plan, optimize the scheduling of machinery, materials, and labor in combination with the on-site construction organization plan, and conduct simulated pre-construction.
具体应用：concrete application:
某深基坑工程南北长88.5米，东西宽68.3米，挖深-6.12米，局部-7.2米，基坑紧邻西侧用地红线，红线外为市政道路和中学，-2.8～-14米为淤泥质粘土，基坑施工对周边环境沉降位移风险较大。该深基坑工程在施工前采用本实施例的模拟计算方法，为施工方案优化提供了技术和数据支持，实际施工支护结构位移、沉降都在模拟计算范围之内，加快进度的同时，确保了质量和安全，该工程使用的BIM软件包括理正岩土软件、理正深基坑软件、品茗PBIM场布软件。具体包括以下步骤：A deep foundation pit project is 88.5 meters long from north to south, 68.3 meters wide from east to west, -6.12 meters deep, and -7.2 meters in part. The foundation pit is close to the red line of the land on the west side. Because of the high quality clay, the foundation pit construction has a greater risk of settlement and displacement of the surrounding environment. The deep foundation pit project adopts the simulation calculation method of this embodiment before construction, which provides technical and data support for the optimization of the construction plan. The displacement and settlement of the actual construction support structure are within the simulation calculation range. In order to ensure quality and safety, the BIM software used in this project includes Lizheng geotechnical software, Lizheng deep foundation pit software, and Pinming PBIM site layout software. Specifically include the following steps:
如图2所示，首先利用理正岩土软件，将二维的土层信息进行三维建模，得到三维土层模型；As shown in Figure 2, firstly, using Lizheng geotechnical software, 3D modeling of 2D soil layer information is used to obtain a 3D soil layer model;
如图3所示，将生成的三维土层模型导入理正深基坑软件，在土层模型基础上对深基坑支护设计进行建模，该工程的基坑支护采用SMW工法桩加钢管内撑；As shown in Figure 3, the generated 3D soil layer model is imported into Lizheng Deep Foundation Pit software, and the deep foundation pit support design is modeled on the basis of the soil layer model. The foundation pit support of this project adopts SMW construction method piles inner support of steel pipe;
利用理正深基坑软件，对基坑围护设计模型进行受力计算，依据计算结果合理选择出土口，并对结构受力较大处进行施工优化，如图4所示，从软件中可看出围护设计模型上的受力情况；Using Lizheng deep foundation pit software, the force calculation of the foundation pit enclosure design model is carried out. See the stress on the enclosure design model;
通过理正深基坑软件按开挖进度进行挖土工况模拟计算，依据计算结果调整优化挖土方案，并对深基坑检测单位提出合理的监测点布置优化意见，对位移值较大处重点加强检测，如图5所示，从软件中可看出开挖3.05米深度时，支护结构的变形状态，依据开挖进度，可计算各个深度节点支护结构的变形状态，以采取优化措施；Through the deep foundation pit software, the simulation calculation of the excavation conditions is carried out according to the excavation progress, and the excavation plan is adjusted and optimized according to the calculation results. Focus on strengthening the detection, as shown in Figure 5, the software can see the deformation state of the support structure when the excavation depth is 3.05 meters. According to the excavation progress, the deformation state of the support structure at each depth node can be calculated to optimize the measure;
如图6所示，将调整优化后的深基坑施工方案在品茗Pbim软件内进行施工摸拟，结合进度、现场施工组织、机械、材料、劳动力调度，进行摸拟预施工。As shown in Figure 6, the adjusted and optimized deep foundation pit construction plan is simulated in Pinming Pbim software, and the simulation pre-construction is carried out in combination with the schedule, on-site construction organization, machinery, materials, and labor scheduling.
上述实施例仅用于解释说明本发明的构思，而非对本发明权利保护的限定，凡利用此构思对本发明进行非实质性的改动，均应落入本发明的保护范围。The above embodiments are only used to illustrate the concept of the present invention, but not to limit the protection of the rights of the present invention. Any non-substantial changes to the present invention by using this concept should fall within the protection scope of the present invention.

Claims (3)

  1. 一种基于BIM的施工前深基坑模拟计算方法，其特征在于，包括以下步骤：A BIM-based pre-construction deep foundation pit simulation calculation method, characterized by comprising the following steps:
    S1.通过岩土软件，对深基坑的土层勘测信息进行三维建模，得到三维土层模型；S1. Through the geotechnical software, three-dimensional modeling is performed on the soil layer survey information of the deep foundation pit, and a three-dimensional soil layer model is obtained;
    S2.将三维土层模型导入深基坑软件，在三维土层模型基础上根据深基坑支护设计对深基坑支护结构体系进行建模，得到基坑支护结构设计模型；S2. Import the three-dimensional soil layer model into the deep foundation pit software, model the deep foundation pit support structure system based on the three-dimensional soil layer model according to the deep foundation pit support design, and obtain the foundation pit support structure design model;
    S3.利用深基坑软件，对深基坑支护结构设计模型进行受力计算，计算得出深基坑支护结构的受力情况，以及在不同受力情况下的结构变形数据，并依据模拟计算结果进行施工优化；S3. Use the deep foundation pit software to calculate the force of the design model of the deep foundation pit supporting structure, and calculate the force of the deep foundation pit supporting structure, as well as the structural deformation data under different stress conditions. The simulation calculation results are used for construction optimization;
    S4.将调整优化后的深基坑支护施工方案在BIM软件中进行施工模拟，结合现场施工组织方案，优化机械、材料、劳动力调度，进行摸拟预施工。S4. Carry out construction simulation in the BIM software for the adjusted and optimized deep foundation pit support construction plan, optimize the scheduling of machinery, materials, and labor in combination with the on-site construction organization plan, and conduct simulated pre-construction.
  2. 如权利要求1所述的一种基于BIM的施工前深基坑模拟计算方法，其特征在于，所述步骤S3中还包括以下步骤：利用深基坑软件，按照施工顺序对挖土工况进行模拟计算，依据计算结果调整优化挖土分段分层工况，并选择结构受力变形较小处作为出土口，依据计算结果调整优化挖土方案。A BIM-based pre-construction deep foundation pit simulation calculation method according to claim 1, wherein said step S3 further comprises the following steps: using deep foundation pit software, according to the construction sequence, perform the excavation conditions. Simulation calculation, according to the calculation results to adjust and optimize the excavation section and layered working conditions, and select the place with less stress and deformation of the structure as the excavation port, and adjust and optimize the excavation plan according to the calculation results.
  3. 如权利要求2所述的一种基于BIM的施工前深基坑模拟计算方法，其特征在于，所述步骤S3中还包括以下步骤：依据挖土工况的计算结果，进行监测点布置优化，重点对模拟计算中支护结构位移较大处进行加强监测。A BIM-based pre-construction deep foundation pit simulation calculation method according to claim 2, wherein the step S3 further comprises the following steps: according to the calculation result of the excavation condition, optimizing the layout of monitoring points, Emphasis is placed on strengthening monitoring at the places where the displacement of the supporting structure is large in the simulation calculation.
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