Floodable Bridge Ter in Manlleu River / Sau Taller d’Arquitectura

由专筑网Zia，小R编译

该项目的主要目标是成为Manlleu河床周围休闲、文化、体育和教育活动的催化剂，这个目标可以用三个基本策略来解释。

Text description provided by the architects. The main objective of the project is to become a catalyst for activities of leisure, culture, sports, and education around the Ter riverbed in Manlleu. The objective can be explained by three basic strategies:



第一个是区域逻辑，促进河床作为景观利益的空间；第二个是城市战略，巩固与河流相切的绿色休闲文化轴；第三个是技术解决方案，一个精确且对环境影响很小的方案。

The first one is a territorial logic promoting the riverbeds as spaces of landscape interest. The second one is the urban strategy, consolidating the green recreational-cultural axis tangent to the river. And the third one is the technical solution, a very punctual action with low environmental impact.



区域逻辑，河床是城市内的资源。该项目追求的目标是恢复河床周围的生态活动。根据定义，河床是必要的生态区，也就是指从河流本身的生态系统和紧邻的生态系统中的空间，这些地区拥有巨大的景观和环境资源。当穿过城市中心时，它们或许会被忽略，但它们引导着河流，在可能被淹没和不可淹没的空间之间形成了一个屏障。这个建议是基于这样的信念：如果我们把生态活动回归到这些地方，模糊河流和城市之间的界限，城市环境将得到极大的丰富，从而促进空间的归属感。

THE TERRITORIAL LOGIC, THE INTER-MUNICIPAL SCALE: THE RIVERBED. The project pursues the objective of recovering the activity of the riverbeds. The riverbeds, by definition, have always been magnificent ecotones, that is, spaces that live from the ecosystem of the river itself and from the immediately adjacent one; the intermediate spaces. These areas have great landscapes and environmental wealth. As they pass through the urban centers they have been abandoned, channeling the river and forming a barrier between the floodable and non-floodable spaces. The proposal is based on the conviction that, if we return activities to these places and blur the line between the river and the city, we will enrich them, thus promoting maintenance and the feeling of belonging.



市政逻辑，城市战略——绿色轴线。Manlleu的生活来源于河流，也得益于河流：农业和工业活动得益于城市内河流的布局。如果对城市结构进行分析，可以看出在城市大发展时期，该镇是背对河流的。近年来，该地区在自由空间、文化设施和运动区的建设上得到了提升。因此，一条新的休闲文化轴线出现在与河流相切的位置。这是一个必须加强的轴线，这条轴线从最西边的Renfe车站开始，穿过体育区、操场和街道，直到最东边的博物馆。在这里，河道蜿蜒，有零售和码头，右侧河床上还有一处约30公顷的草地。

THE MUNICIPAL LOGIC, THE URBAN STRATEGY: A GREEN AXIS. Manlleu has lived from and thanks to the river: agricultural and industrial activity has benefited from the layout of the Ter river. If the urban structure is analyzed, it can be seen how in periods of great urban development, the town has turned its back on the river. In recent years, the area has been promoted based on free spaces, cultural facilities, and sports areas. Thus, a new leisure-cultural axis appears tangent to the river on the left-hand side. This is an axis that must be strengthened. An axis that begins at the Renfe Station, at the extreme west, and continues through the sports area, the playgrounds, and the Paseo del Ter until it reaches the Ter Museum, at the extreme east. Right here, where there is a kiosk and a small jetty for kayaks, the course of the river forms a meander and generates a large meadow of about 30 ha on the right-hand bed.



该项目的主要目标是连通两侧河床，建立一个区域内的娱乐文化轴。通过这种方式，Manlleu将获得30,000平方米的自由空间，建造一个充满可能性的空间，完成从纯粹的沉思（在草地上散步是一种奢侈）到运动（为尊重环境的运动实践创造新的自然空间）的升级改造。教育活动也可以得到促进，这里是博物馆的延伸，可以成为露天的博物馆，人们不仅可以了解河流和它周围的生态系统的重要性，而且还可以了解它的遗产价值。

The main objective of the project is to allow the jump from the left riverbed to the right, leading to an entire recreational-cultural axis in a large area that has been residual until now. In this way, Manlleu gains 30,000 m2 of free space. A space full of possibilities, from purely contemplative (walking through the meadow is a luxury) to sports (creation of new natural spaces for the practice of sport that respects the environment). Educational activities can also be promoted, almost as an extension of the Ter Museum, an open-air museum where not only the importance of the river and the ecosystems that surround it can be understood and explained, but also its heritage value.



建设的逻辑和技术解决方案。在所有的可能性中，最终选择了人行桥，因为它们是对环境影响较小的基础设施。根据定义，该桥体是一个可淹没的设施。因此，它是自然融入河流动态的人工制品。该项目设计了一系列的混凝土平台，让人联想到河流的古老台阶，人们可以通过从石头到石头的跳跃从河的一端到另一端。

THE CONSTRUCTIVE LOGIC AND TECHNICAL SOLUTIONS. Among all the possibilities, a passallis-walkway is chosen, since they are infrastructures with low environmental impact. A “passallis”, by definition, is a floodable element. Thus, they are artifacts that are naturally incorporated into the dynamics of the river. The project proposes a series of concrete platforms that evoke the old steps of the river where one could pass from one riverbed to the other by jumping from stone to stone.



几何形状响应了河道环境中的具体需求，没有形式主义，而是对水力和功能需求的有效回应。基础是一些25厘米厚的混凝土墙，垂直于河水流动，间隔2.25米，保证了日平均流量的水力能力。在上面，悬臂式10厘米深的1.5米×3.95米的混凝土平台将对水流的影响降到最低。平台之间不相接触，结构保持开放，改善了被淹没后的状况。在平台和平台之间是金属连接板，除了为通行提供必要的便利，为服务车辆提供便利外，还有助于维护，因为这些都是可拆卸的。

The geometry responds to the specific needs in the fluvial environment and therefore there is no formalism but an efficient response to the hydraulic and functional demands. Some 25cm thick concrete walls, perpendicular to the river flow, placed 2.25m apart, guarantee the hydraulic capacity for the average daily flow. Above, cantilevered 10cm deep concrete platforms of 1.5m x 3.95m minimize the impact on the flow. The platforms do not touch each other and, in this way, the structure remains open, improving the hydraulic behavior of the "passallis" in episodes of large outpourings of water. Between platform and platform are the metal rails, which, in addition to providing the passage with the necessary accessibility even for service vehicles, help with maintenance since they are removable.



当从河流的一侧到另一侧时，行人会发现自己在城市生态系统的舒适区之外，在没有保护的情况下，意识到河流的力量。水冲刷墙壁的噪音、湿度和温度的变化，都有助于让人沉浸在河流的生态系统中。

When passing from one riverbed to the other, the pedestrian finds herself outside the comfort zone of the urban ecosystem and, unprotected becomes aware of the force of the river. The noise of the water brushing against the walls, the humidity, and the change in temperature, all help to feel immersed in the river ecosystem.



随着时间的推移，可淹没的桥梁将不断发展：混凝土的颜色将根据水位的变化而变化，墙壁将显示出由各种洪水引起的石头和树干冲刷的疤痕，金属板将由于太阳辐射而变黑。通过这种方式，这座设施会像河床的两岸一样，转变为一个生态区，即城市和河流这两个系统之间的过渡。

Over the years, the floodable bridge will evolve: the color of the concrete will change depending on the water levels, the walls will show scars of stones and trunks caused by the episodes of various floods of water, and the metal framework will darken due to solar radiation. In this way, the "passallis" will be transformed, like the banks of the riverbed, into an ecotone: a transition zone between two ecosystems, the urban and the fluvial.





建筑设计：Sau Taller d'Arquitectura
类型：人行桥
面积: 410 m2
项目时间：2021年
发起人：Ajuntament Manlleu
国家：西班牙

PEDESTRIAN BRIDGE•SPAIN
Architects: Sau Taller d’Arquitectura
Area: 410 m2
Year: 2021
Promoter: Ajuntament Manlleu
Country: Spain