建筑及工程设计：哈维尔·丰特，阿尔法北极星公司Architects and Engineers:Xavier Font,Alfa Polaris S.L.



坎·希利步行桥，格拉诺列尔斯，西班牙

Can Gili Footbridge,Granollers,Spain,2010

建筑及工程设计：哈维尔·丰特，阿尔法北极星公司Architects and Engineers:Xavier Font,Alfa Polaris S.L.

1 实景/Bridge view

2 平面/Plan

3 步行桥底部/Bottom view of the bridge

BV-1432公路的路堑将两侧的居民区分隔开来，修建一座步行桥一直是居民的诉求。长期以来，人们想从一个居民区去往另一个的时候都不得不绕远路。因此，2001年初，格拉诺列尔斯自治委员会委托阿尔法北极星公司，为这两部分城市区域的新连接进行概念设计和细部设计。

路堑的不对称横截面对步行桥的设计方案产生了很大影响。这种不对称主要指道路两岸具有的不同标高，以及位于路堑南端的中部的一个小平台，而设计正试图强调这些不对称要素。

我们还在寻求能够降低生活成本和减轻环境负担的办法。这也是选择耐候钢、LED灯和聚合木材的原因：耐候钢的生锈表皮保护它免受深层腐蚀，用于承重结构；LED灯的使用寿命长久并且节约能源，用于桥面照明；聚合木材所需维护成本极小，用于承重结构上方的桥面铺设。

我们设计了一种曲柄状的梁，具有变化的宽度和深度，跨距为32.7m，由两段纵向的钢制中空箱梁构成。步行道位于主体横跨结构上，处于两段箱梁之间，箱梁则在底部翼缘处通过横梁相连。

V字形曲柄状主梁位于北侧基础之上，设立于前文提到的小平台上，其末端支撑起跨度为13.9m的甲板。鉴于那里糟糕的土地条件，此种形式避免了在路堑南端的上方建设基础。

此项目中，钢材使得设计方案中的雕塑般造型得以轻易实现。此外，高强重比使结构变得很轻，以此节省了桥基的建造成本。钢材的使用允许在加工厂受限的环境下制造桥面——人行桥的基础、桥墩、桥肩为现场浇筑，钢结构为预制。这些均提高了生产质量并且加快了施工过程。

桥面上的路灯为12盏LED灯，由固定在主体结构内侧网面的耐候钢支撑，保护其免受破坏。带有不锈钢杆件的灯柱也被安装在两侧上桥处。 （辛梦瑶 译）

The construction of this footbridge is an old claim of the inhabitants of the two neighbourhoods separated from one another by the trench of the BV-1432 road.So far,people from one neighbourhood wanting to go to the other one had to make a detour.For this reason,at the beginning of 2001 the Granollers Borough Council commissioned Alfa Polaris to carry out the concept design and the detailing document of a new link between these two urban areas.

The design of the proposed footbridge was strongly conditioned by the asymmetric shape of the cross section of the road trench.We looked for a design that would highlight this asymmetry marked by the different levels of the two banks and the presence of a small platform in the middle of the south cutting of the trench.

We looked for a solution with reduced whole life cost and environmental burdens.This is the reason why we chose Corten steel–whose rusted skin protects itself from further corrosion–for the structure,LED lamps –with long life span and energy efficiency–for the street lighting over the deck,and polymeric timber–with almost no maintenance–for the decking over the structure.

We proposed a cranked shape beam,varying in width and in depth,spanning 32.7 metres,formed by two steel longitudinal hollow box girders.Over the main span the footpath is channelled by these two box girders which are linked together at bottom flanges by transversal beams.

Over the north foundation,placed on the mentioned platform,the main cranked beam takes a V shape,the top ends of which give support to a small deck that spans 13.9 metres.Doing this way,we avoided to build a foundation on the top of the south cutting of the trench,which had very bad ground conditions.

In this project,steel allowed us to easily achieve the sculptural forms the proposed design required.Moreover,its high strength-to-weight ratio resulted in a very light structure and the consequent savings for the foundations.Using steel for the deck permitted us to manufacture the deck in the controlled environment of the fabrication workshop,so that,meanwhile the foundations,the piers and the abutments of the footbridge were made on site,the steel structure was being fabricated.This helped us to increase the quality of the product and speed up the construction process.

On the deck the street lighting is provided by means of twelve LED lamps,supported and protected from vandalism by means of Corten steel shelters fixed to the inner webs of the main structure.Additional lamp columns,with stainless steel stems,were installed on both approaches.

4 实景/Bridge view

项目信息/Credits and Data

客户/Client:格拉诺列尔斯自治市议会/Granollers Borough Council

结构设计/Structural Engineering:Xavier Font,Alfa Polaris S.L.道路照明工程/Street Lighting Engineering:GESA Gestió d'enginyeria,serveis i arquitectura

现场监理/Site Supervision:Alfa Polaris,S.L.

总承建商/Main Contractor:ACSA,Obras e Infraestructuras,S.A.

钢结构承建商/Steel Contractor:Talleres Plain,S.A.

造价（含上桥处）/Cost(including approaches):€574,400建造时间/Comstruction Period:2009-2010

类型/Typology:40m长连续曲柄状结构，主体跨度32.7m，桥面宽度1.95m/40m long continuous cranked structure with a main span of 32.7m.Deck width 1.95m.

主要材料/Main Materials:桥面/Deck:耐候钢/Corten steel;桥肩/Abutments:钢筋混凝土/reinforced concrete; 桥面

LED支撑/LED lamp supports on the deck:耐候钢/Corten steel; 上桥处灯柱/Lamp columns on the approaches:不锈钢/stainless steel; 扶手/Handrails:不锈钢和漆面钢/ stainless steel and painted steel; 垃圾箱（街道设施）/ Litter bins(street furniture):镀锌钢和漆面钢/galvanized steel and painted steel; 桥面铺地/Deck paving:聚合木材/ polymeric timber

摄影/Photos:Xavier Font

评论

刘晨：“一桥飞架南北，天堑变通途”。用长江大桥的气势来形容西班牙小镇这座步行桥，是夸张了些，路沟本非天堑，看上去也不是不可逾越，但若没有它，沟两畔的居民要么老死不相往来，要么就得“迢迢暗渡”。我在想，修这桥之前，沟南的小伙伴若是去找沟北的小伙伴玩耍，是不是直接翻沟过去了？沟南沟北的老朋友出门彼此瞧见了，想聊个天是打手语还是咆哮？看来距离与深浅无关，沟堑与水一样，皆令人远，它们异口同声地说：“要有桥！”于是就有了桥。它骄傲地腾挪着耐候钢的躯干，似乎告诉人们它本来就在这里，并且一直都在。

张昕楠：非对称的和谐

坎·希利步行桥是一个看似简单却敏感回应了场地条件的设计。其结构采用了变截面空心箱梁的建构方式，使整体呈现出强烈的体量雕塑感。因桥两侧的场地和地质差异，该桥在剖面、平面的设计和建构处理上，表现出非对称的理性和谐。结构的形式也将河渠断面的梯形转译为两个三角形的受力体系，并将刚性更强的封闭三角形结构置于北侧，以减轻北侧桥基对驳岸基础带来的压力。结构形式的转换也带来了空间的微妙变化，增强了南侧桥体空间的围合感。

5　剖面/Section

Comments

LIU Chen :On first look,the road trench is not so impossible; a trench is not an abyss,after all.But without the footbridge,the inhabitants on one side of the trench would either take a long detour to reach the opposite side,or never communicate with one another.It would be curious to know whether the boys from the south neighborhood would cut through the trench straight to play with boys on the other side.Would someone from the north neighborhood greet their old friends on the opposite side in gesture language,or shout out at each other across the trench? River or trench,the distance is there to obstruct communications."Let there be bridge",so there is a bridge.Its Corten-steel structure leaps over the trench proudly,as if to proclaim its lasting existence.

6.7　夜景/Night views

ZHANG Xinnan:the Harmony of Asymmetric

Though seemingly simple,the Can Gili footbridge is a design that sensitively responds to the site condition.The sculptural volume of the footbridge results from its steel longitudinal hollow box girders.Because of the geological differences on either side of the bridge,the design shows an asymmetric yet rational harmony.The form of the structure translates the trapezoidal section of the trench into two triangular mechanical systems,and places the more rigid,closed triangular structure in the north,so as to reduce the pressure on the north bridge foundation.Meanwhile,the structural transformation also brought about subtle spatial changes and enhanced the sense of spatial enclosure to the south of the bridge.