循环梁 - 园林吧

循环梁
Circular Cycle Brigde

荷兰埃因霍温市壮观的环形自行桥最近（2012年6月）向公众开放。这座斜拉桥由ipv代尔夫特设计，为骑自行车的人和行人提供了令人兴奋的交叉口。自行车环岛以其令人印象深刻的塔架、72米直径、薄薄的甲板和引人注目的照明成为这座城市的新地标。
The spectacular circular cycle bridge in the Dutch city of Eindhoven has recently (June 2012) been opened to the public. The cable-stayed bridge, designed by ipv Delft, offers cyclists and pedestrians an exciting crossover. With its impressive pylon, 72 metre diameter, thin deck and conspicuous lighting, the cyclist roundabout is a new landmark for the city.

就像一个飞碟，钢铁桥在赫尔班/米勒纳克韦格交叉口的上方呼啸而过，令人印象深刻的塔架标志着通往埃因霍温和维尔德霍温两座城市的入口。这里曾经有一个平交道口，但附近一个住宅区的开发意味着需要改变交叉口，以应对日益增长的交通。由于埃因霍温市议会禁止骑自行车通过地下通道，也不想修建平交道口，他们要求荷兰桥梁专家ipv Delft研究可能的解决方案。圆形斜拉桥很快就成为了最佳选择。
Like a flying saucer, the steel bridge hoovers above the Heerbaan/Meerenakkerweg intersection, its impressive pylon marking the entrance way to the cities of Eindhoven and Veldhoven. There used to be a level crossing here, but the development of a nearby housing estate meant the intersection needed changing in order to cope with growing traffic. As Eindhoven City Council refrains from cyclist underpasses and didn’t want a level crossing roundabout either, they asked Dutch bridge specialist ipv Delft to look at possible solutions. A circular cable-stayed bridge soon appeared to be the best option.

Design: ipv Delft
Client: Municipality of Eindhoven
Completion date: 2012
Location: Einhoven, The Netherlands
Dimensions: Height 70m, Diameter 72m
More: here

Circular Cycle Brigde

Structure

该桥由70米高的塔架、24根钢缆和一个圆形桥面组成，由钢材制成。电缆连接到桥面内侧，桥面与圆形配重连接的位置。这样可以防止桥面内的扭转。引桥附近的M形支架也确保了稳定性。
The bridge comprises a 70-metre high pylon, 24 steel cables and a circular bridge deck and is made out of steel. The cables are attached to the inner side of the bridge deck, right where the bridge deck connects to the circular counter weight. This way, torsion within the bridge deck is prevented. The M-shaped supports near the approach spans also ensure stability.

设计过程的挑战之一是空间整合。现有基础设施和建筑为通往环岛的斜坡坡度设置了边界。由于空间有限，决定将下方交叉口的地面标高降低一米半，为行人和骑自行车的人提供一个舒适的斜坡。
One of the challenges of the design process was the spacial integration. The existing infrastructure and buildings set the boundaries for the grades of the slopes leading up to the roundabout. As space was limited, it was decided to lower the ground level of the intersection underneath by a metre and a half, allowing for a comfortable slope for pedestrians and cyclists.

Tailor-made

设计和建造过程也带来了许多技术挑战。Ipv代尔夫特对这座桥应该是什么样子有着非常清晰的看法：只不过是一个薄薄的圆形桥面和一个形状强大的桥塔。除其他外，这意味着将电缆连接到塔架的标准方式不够，因为这将导致塔架顶部附近出现大量电缆。因此，设计了一个定制的解决方案。这同样适用于跨桥附近的M形支架。
The design and building process offered many technical challenges as well. Ipv Delft had a very clear view of what the bridge should look like: little more than a thin circular bridge deck and a powerfully shaped pylon. Amongst other things, this meant the standard way of attaching cables to the pylon wouldn’t suffice, as it would result in a bulk of steal near the pylon top. Therefore, a tailor-made solution was designed. The same applies to the M-shaped supports near the span bridges.

Lighting design

功能照明集成到栏杆中，LED照明照亮桥面，同时确保桥梁使用者的面部识别。附着在塔架和桥面之间的电缆框架上以及圆形配重内表面上的灯照亮了下方的交叉点。
Befitting Eindhoven’s identity as the ‘City of Light’ (Eindhoven is home to the Philips company), ipv Delft also made a lighting design for the Hovenring. One of its main elements is integrated into the circular deck. The space in between counter weight and deck has been fitted with aluminum lamellas, translucent sheeting and tube lighting, which results in a clearly visible ring of light at night. Together with the illuminated pylon, the ring of light ensures the bridge’s spectacular appearance at night.
The functional lighting is integrated into the railing, where LED-lighting illuminates the bridge deck and ensures facial recognition of the bridge users at the same time. Lights attached to a cable framework in between pylon and bridge deck and to the inner surface of the circular counterweight illuminate the intersection underneath.

Both day and night, the pylon bridge is a true eye-catcher, spectacular in its simplicity.