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Provencher_Roy事务所对修女岛的达尔文桥进行了重建，该项目别出心裁地使用了当地的回收玻璃。玻璃混凝土（GGP）的全球首发为城市设计的可持续材料开辟了新的领域。

修女岛上的达尔文桥已经有将近60年的历史，这座大桥经历了时间的洗礼和侵蚀。事实上，桥面上狭窄的人行道给步行、推婴儿车和骑行的人们带来了诸多不便；在能见度有限的情况下，桥下的通道开始出现积水坑。因此，蒙特利尔市希望Provencher_Roy事务所能够重建这一标志性的基础设施，并将本次设计纳入相关规范中。

Provencher_Roy ’s reconstruction of the Darwin Bridges on Nuns’ Island makes noteworthy use of locally sourced recycled glass. This world premiere of ground glass pozzolan (GGP) opens the door to new sustainable materiality in the urban design field.

Nearly 60 years old, the Darwin Bridges on Nuns’ Island had endured the ravages of time and erosion. In fact, the tightening of the sidewalks was beginning to cause discomfort for pedestrians, bicycles, and strollers alike; and the passage underneath the bridges was starting to accumulate puddles of water amidst limited visibility. Ville de Montréal therefore called upon Provencher_Roy to reconstruct this emblematic infrastructure, and simultaneously bring the design up to code.

▼项目概览，Overall view © Stéphane Brügger

“在20世纪60年代，该岛的城市化进程最初是受到美国的新郊区住宅的启发，因此，社区和城市之间的车辆路线使用‘grape’方案进行连接。但除了这些永久性的路线之外，还许多规划的人行道，它们与城市道路分隔开，将住宅区与社区公园（例如西温哥华公园）连接了起来。”项目经理acques Rousseau解释道。

“In the 1960s, urbanization of the Island was originally inspired by the new residential suburbs cropping up in the United States. As a result, neighbourhoods in ‘grape’ configurations were linked to urban vehicular routes. But alongside these enduring routes are numerous pedestrian pathways, which are separated from the roads and connect residential zones to community parks, like Parc de West-Vancouver,” explains Jacques Rousseau, Project Manager.

达尔文桥位于修女岛城市大道与步行街、自行车道交汇的十字路口，一个有序循环的交通交汇处。“这个概念一直存在，但是当时的城市设计和建造标准是更有利于汽车的通行，并且采用了波纹镀锌铁护栏来防止车辆坠落。因此，对于这个项目，我们在矛盾的20世纪60年代的背景下开始打造这个创新的城市项目，希望能够改善使用者的体验，同时还要应对道路交通所产生的一系列问题。”Jacques解释道。因此，设计者的目的是在开发解决方案的同时协调现状条件，最终呈现的效果既增强了建筑语言，又满足了安全法规。

The Darwin Bridges act as the meeting place of this ordered circulation, at the crossroads of a Nuns ’ Island urban boulevard and pedestrian and cycling path. “The concept was always there, but the design and construction standards of the time favoured the automobile, with corrugated galvanized iron guardrails to prevent vehicles from falling. For this project, we were therefore working in a paradoxical 1960s context, on an innovative urban project to improve the user experience, while also contending with the formal urban treatments required for road transportation,” explains Jacques. Our intention therefore reconciles these two rudimentary propositions in the development of a solution that at once enhances the architectural language and fulfills safety regulations.

▼顶视图，Top view © Stéphane Brügger

高速公路视角：通过流线型的设计传递动感
Seen from the highway: movement expressed through a streamlined design

用Jacques的话来说——“这座城市被弧形和拱形的设计所吸引”，桥梁的曲率表达了一种独特的语言。为了达到这一美丽的效果，设计者决定拆除波纹电镀锌铁护栏，并重新打造了超过4米的安全间隙。由此生成的前卫且优雅的设计为这座跨度37米的桥梁带来的动态美。

In Jacques’ words, “the Ville was won over by the idea to create curved arch-like formwork,” following the curvature of the road to express a unique language. This esthetic decision eliminated corrugated galvanized iron guardrails and integrated a security clearance of over 4 metres. The resulting avant-garde design elegantly conveys a sense of movement spanning the full 37-metre bridges.

▼流线型的桥身设计，Streamlined bridge design © Stéphane Brügger

人行路视角：一座舒缓的秘密花园
Seen from the pathway: a soothing secret garden

在两部分桥梁之间，设计者加入了中央隔离带的设计，从高速公路开始，两个圆形拱形结构沿着斜坡向自行车道延伸，同时勾勒出人行道的轮廓，设计者在这里进行了景观设计，在桥梁之间策略性的打造了挡土墙，景观绿植被设置在挡土墙的阶梯台面上，向附近的西温哥华公园致敬。桥梁的外部雕刻了的半圆和模仿植物根茎的长条形装饰图案，形成浮雕风格的花朵图案，在夜幕降临后，可持续的LED灯为这条道路增添了温暖的色调。令人舒适的桥下空间以及安全照明装置的安装，增强了来往行人的安全感。

Between the two bridges, the central median strip was opened up and dug out. Starting from the highway, two circular arches descend the slope towards the cycling path, delineating the pedestrian crossing enclave and revealing a landscape design opportunity manifested in strategically placed retaining walls between the bridges to create vegetated terrace levels, a nod to the nearby Parc de West-Vancouver. The exterior-facing sides of the bridges are adorned with hollowed-out half-circles and flower stems, creating the illusion of a low-relief of stylized flowers, while at nightfall, the pathway becomes illuminated with warm tones, thanks to sustainable LED lighting. This pleasant opening up of the space, along with the integration of safety lighting fixtures under the bridges, inspire safety amongst users and prevent tunnel sensations.

▼中央隔离带，overall of the project © Stéphane Brügger

▼桥下的景观设计，Landscape design under the bridge © Stéphane Brügger

采购自当地的生态材料：玻璃混凝土（GGP）
Locally sourced and ecological material: ground glass pozzolan (GGP)

这座桥梁的一大创新之处在于设计者采用了前所未有的建造材料，桥身主体使用现浇混凝土打造，其中混合了10%的细磨再生玻璃。事实上，这个开创性的项目建立在Université de Sherbrooke和蒙特利尔市关于毛玻璃运用到市政基础设施中的研究基础上。这项GGP技术为100%魁北克专利，属于全球首发，作为三元复合粘合剂进行添加，使本项目能够减少40吨温室气体的排放，相当于汽车行驶20万公里的排放量，从而对环境产生直接影响。设计者使用GGP取代普通水泥，由40000公斤当地回收的玻璃制成，相当于70000个酒瓶。

The great novelty of this bridge construction lies in the unprecedented materials choice. The bridges were built with cast-in-place concrete, composed of 10% finely ground recycled glass. In fact, this ground-breaking project builds upon 17 years of research on the integration of ground glass into civic infrastructures, in collaboration with the Université de Sherbrooke and Ville de Montréal. A world premiere, this 100% Québécois patented GGP invention was added as a ternary binder, enabling the project to make a direct environmental impact by reducing greenhouse gas emissions by 40 tonnes, the equivalent of driving 200,000 kilometres in a vehicle. The GGP used replaced the cement typically used, constituting 40,000 kilograms of locally recycled glass and representing 70,000 wine bottles.

▼桥身近景，Close view of the bridge © Stéphane Brügger

由魁北克技术打造的更加可持续的城市基础设施
A Québécois technique for more sustainable urban infrastructures

设计者为本设计开发了色调最白的GGP，其特点是比传统的混凝土材料的颜色种类更少。因为添加了不锈钢骨架来进行加固，这座桥的使用寿命估计可以超过125年，而典型混凝土结构桥梁的使用寿命为75年，因此更加坚固。本设计目前正在申请ENVISION环境认证（相当于LEED的城市基础设施认证）。

The architectural team developed the whitest GGP possible for the bridges, characterized by a less raw colour than traditional aggregates. It is also much more solid, due to the addition of stainless steel bars to reinforce the lifespan of the bridges, estimated at over 125 years, compared to 75 years for a typical concrete structure. The design is currently a candidate for ENVISION environmental certification, the urban infrastructure equivalent of LEED.

▼照明设计，Lighting design © Stéphane Brügger

城市遗产的改造与复兴：Provencher_Roy的专业领域
Reviving and adapting urban heritage: Provencher_Roy’s expertise

“本设计的重点是要认识到项目的原始价值，这是一项与修女岛居民息息相关的任务，提供了一种创新的城市生活方式，解决了行人与汽车通行等级的问题。我们遵循当代交通逻辑，通过增强桥梁的建筑语言、实体应用和视觉效果，为这座20世纪60年代的美丽设施注入了新的生命。并且，采用超越代际城市建筑语言的能力是Provencher_Roy事务所的独特优势之一，也是我们的重要资产之一” Jacques总结道。

“It’s important to recognize the original value of the project, a residential mandate on Nuns ’ Island offering an innovative urban life experience addressing the pedestrian-automobile hierarchy. We were able to breathe new life into a beautiful idea from the 1960s, by enhancing its architectural language, physical application, and visual appeal – following a contemporary logic,” states Jacques. “The ability to employ an urban architectural language that transcends generations is among Provencher_Roy ’s particular strengths, one of its main assets,” he concludes.

▼平面图，plan © Provencher_Roy

▼立面图，elevation © Provencher_Roy

▼立面图和剖面图，elevation and section © Provencher_Roy

Location: Montréal / Ile des Sœurs, Québec, Canada
Project’s name: Ponts Darwin
Client: Ville de Montréal
Year: 2021
Surface Area: 37m
Architecture: Provencher_Roy
Photographie : Stéphane Brügger
Civil: SNC-Lavalin
Structure: SNC-Lavalin (durabilité du béton)
Lighting: SNC-Lavalin
Entrepreneur: Tisseur Inc
Landscape: Provencher_Roy
Certification: Candidat à la certification Envision

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