转自：兰天Brian
rebuilding Notre Dame under a 3D BIM model
Notre Dame Image Autodesk
DESCRIPTION | 细节描述
After the tragic fire that destroyed part of the French cathedral of Notre Dame in Paris, its reconstruction began.
在法国巴黎圣母院的部分建筑被大火烧毁后，它的重建工作开始了。
The fire, which started on the roof of the infrastructure, consumed oak beams 1,000 years old, bringing down its 19th century spire and releasing tons of molten lead on the stone vaults.
大火从基础设施的屋顶开始，烧毁了有1000年历史的橡木梁，冲垮了19世纪的塔尖，释放出数吨熔化的铅到石头拱顶上。
Damage caused which, according to French President Macron, will take about 5 years to recover.
据法国总统马克龙称，造成的破坏需要大约5年的时间才能恢复。
In this process, which started two years ago, digital models and innovative tools have taken a great part of the limelight.
在这一始于两年前的进程中，数字模型和创新工具已经成为人们关注的焦点。
The fact of having the current technological tools allowed, and continues to do so, to accelerate the process and achieve a more accurate reconstruction.
利用现有的技术工具，并继续这样做，以加速这一过程，实现更准确的重建。
点云技术在项目中的应用
Notre Dame Image Autodesk
Before the tragedy, the company Art Graphique & Patrimoine (AGP) already had data to create a digital twin of the building and four days later, one of its teams completed another study to capture the geometry of the damaged building.
在这场悲剧发生之前，AGP公司已经有数据来创建这座建筑的数字双胞胎，四天后，其中一个团队完成了另一项研究，以捕捉受损建筑的几何形状。
The U.S. software company Autodesk Inc. also reacted immediately by offering its resources for the reconstruction of the cathedral.
美国软件公司欧特克公司(Autodesk Inc.)也立即做出反应，提供了重建大教堂的资源。
They began work on a 3D BIM model a few weeks later that would, in turn, help create a historical digital record to increase resilience in future events.
几周后，他们开始了3D BIM模型的工作，反过来，这将有助于创建一个历史数字记录，以提高在未来事件中的应变能力。
The data obtained from the pre-fire reality capture allowed them to create a model of what the cathedral once looked like.
从火灾前的真实捕捉中获得的数据使他们能够创建一个大教堂曾经的模型。
From there, Autodesk performed the same technique to obtain recent scans for comparison.
在那时，Autodesk使用同样的技术获取最近的扫描结果进行比较。
Notre Dame Cathedral in Paris. Image © Andrew Tallon
The initial phase, the safety phase, consisted of building scaffolding around the structure and reinforcing the flying buttresses supporting the stone walls.
初始阶段，安全阶段，包括在结构周围建造脚手架和加强支撑石墙的飞扶壁。
From there, all the burnt timbers were removed, and construction began on a replica of the spire of Notre Dame with more than 1,000 oak trees donated from all over France.
从那里，所有烧毁的木材被移走，并开始建造巴黎圣母院塔尖的复制品，用法国各地捐赠的1000多棵橡树。
In order to meet the restoration schedule, Macron had to create a public body faster than the traditional one and that was put in the hands, several months later, of the public body (EPRNDP).
为了满足修复计划，马克龙不得不比传统的公共机构更快地创建一个公共机构，几个月后，公共机构(EPRNDP)被交到手中。
As this agency began to move into action simultaneously, construction of a 3D BIM model of the cathedral began.
随着该机构开始同时行动，大教堂的3D BIM模型的建设开始了。
Autodesk contracted AGP to provide the billions of point cloud coordinates representing the geometry of the cathedral.
欧特克公司委托AGP公司提供数十亿个点云坐标，代表大教堂的几何形状。
This was because the surveying firm had accumulated accurate data of the cathedral over time.
这是因为随着时间的推移，测量公司积累了大教堂的准确数据。
数字化协同技术的应用
Notre Dame Image AGP
Taking a digital approach also enabled cloud-based collaboration among stakeholders.
采用数字化方法还可以实现利益相关者之间基于云的协作。
In addition, this common data environment will serve as a central repository for all project information and provide all stakeholders with access to the most current data and plans.
此外，这个公共数据环境将作为所有项目信息的中央存储库，并为所有涉众提供对最新数据和计划的访问。
French Army General Jean-Louis Georgelin, in charge of supervision, emphasized that "the use of digital technologies was essential for the public institution".
负责监管的法国陆军将军让-路易·乔治林(Jean-Louis Georgelin)强调，“数字技术的使用对公共机构至关重要”。
He added that "thanks to Autodesk's sponsorship, the use of cutting-edge design and construction and BIM technologies is being leveraged to help prepare for the reopening of the cathedral."
他补充说，“感谢欧特克的赞助，先进的设计、施工和BIM技术的使用正在被用来帮助准备大教堂的重新开放。”
The current goal is to complete the reconstruction by the 2024 Olympic Games.
目前的目标是在2024年奥运会之前完成重建。
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