Penda China defines curvilinear grace with a madeleine-shaped canopy portal, integrating the entrance, threshold and transition zones into a unified whole.
▼项目外观，exterior view ©夏至
In 2020, PRC’s central government set out a Masterplan to get the ball rolling in supporting the construction of Hainan Free Trade Port (Hainan FTP) , which has been designated to be a hub port under the policy of The Belt and Road Initiative (BRI, 一带一路) . Thus far, Hainan Province has quickly and seamlessly integrated into the special economic zone (SEZ) of Mainland China, and its free trade port is now on par with those of Hong Kong and Singapore. Transportation is clearly crucial for the proper functioning of a major hub port; accordingly, Jiangdong New District in Haikou City – the capital and most populous city in Hainan – has commissioned an underground passageway, the Wenming East Tunnel. The project facilitates the New District’s fast-growing transportation and logistics needs with an elegant design, efficiently connecting Haikou City with Chengmai County and Wenchang City as part of the overall economic integration of the area.
▼城市环境，urban context ©夏至
▼场地环境鸟瞰，aerial view ©夏至
Wenming East Tunnel is 4380m at its full length (2720m for the underground 6-lane dual carriageway) with a maximum depth of over 23m. It is the first tunnel to be constructed underneath the Nandu River; vehicles traveling within the tunnel may drive at a maximum speed of 60km/h on the motorway, with a reduced speed limit of 40km/h at road junctions.
▼总平面图，master plan ©槃达中国
▼项目总平面图，project master plan ©槃达中国
▼从城市主干道望向光过渡出口，view to the entrance to the tunnel from the road ©夏至
Penda China 受邀负责设计海口文明东隧道主要干道的地上三个光过渡出口，其中包括一个东岸较大的光过渡出口和两个西岸小的光过渡出口。通常车辆在进出隧道洞口时，人眼需要一定的时间来适应环境亮度的变化。所谓的“光过渡”实际上是为了避免隧道口处黑洞效应，导致驾驶员瞳孔收放速度跟不上洞口内外的光环境变化速度，甚至出现瞬间失明的现象，从而采用的一种建筑遮阳措施。
Penda China was commissioned to design three entrances to the tunnel, one of which is much larger in scale and located on the east side, by the shoreline; the other two are on the west side and much smaller. Generally, vehicular tunnel entrances must provide a transition zone in order to allow the human eye time to acclimate to the considerable change in brightness when going into the tunnel. To dispel any danger to potential drivers, Penda China’s design does away with LED light grilles, and instead incorporates a curved madeleine-shaped canopy. This open clamshell shape ushers in natural light, while maintaining a uniformity of luminance at the entrance.
the open clamshell shape ushers in natural light, while maintaining a uniformity of luminance at the entrance
The entrances are a practice of bionic design, taking elements of marine life as sculptural inspiration, and specifically use undulating white shells as a prototype in homage to their location by the sea.
▼概念草图和概念模型图，concept sketch & concept model ©槃达中国
the entrances specifically use undulating white shells as a prototype in homage to their location by the sea
▼细节，detailed view ©夏至
The canopy is clad in glazed aluminum panels, which have been selected for their exceptional shine and luster. Subtle black lines delineate the outer surface of the canopy in counterpoint to the expanse of curving white panels. The underside of the canopy also incorporates the undulating texture, with the white material continued down the side walls to ensure a uniformity of luminance which is pleasing to the eye. The appearance of a fish’s gills has been taken as a motif there, in a continuation of the marine life theme.
Light travels into the tunnel and over the undulating surface in a rhythmic manner, akin to ripples in still water which gently repeat and gradually subside. The way the stainless steel sheets have been embedded in the granite walls allows the reflected light pattern to continue further, extending the established rhythm. Penda China have also drawn creative inspiration from marine bioluminescence, incorporating a multitude of small lights embedded in the lines between cladding panels. This allows the outer shell to emit a glow at night from up top, bringing a hint of romance to the city.
▼贝壳的材质采用釉面铝板，the canopy is clad in glazed aluminum panels ©夏至
▼肋条之间规律性的嵌入了许多灯珠，a multitude of small lights are embedded in the lines between cladding panels ©夏至
▼花岗岩侧墙上嵌入不锈钢金属片，stainless steel sheets have been embedded in the granite walls along the ramp ©夏至
▼出口细节，detailed view ©夏至
▼表面材质细节，surface detail ©夏至
The three entrance designs vary in size, shape, and location, while all adhering to the same set of design principles, creating a harmony between them and their particular sites. From a bird’s eye point of view, these futuristic landmark entrances stand out from the existing city fabric and provide a tinge of surrealism to Haikou, as envisioned by Penda China. As time goes on, who knows what a city will look like 20 years from now? Perhaps these entrances are simply a beautiful vision of the future, as imagined by Penda China.
▼夜晚的光过渡贝壳，the shell-like entrance by night ©夏至
▼道路视角，view from the road ©夏至
the futuristic landmark entrances stand out from the existing city fabric
▼东岸出口平面图，East entrance plan ©槃达中国
▼东岸出口侧立面图，East entrance elevation ©槃达中国
▼东岸出口侧剖面图，East entrance section ©槃达中国
▼西岸北线出口平面图，West north entrance plan ©槃达中国
▼西岸北线出口侧面图，West north entrance elevation ©槃达中国
▼西岸北线出口剖面图，West north entrance section ©槃达中国
▼西岸南线出口平面图，West south entrance plan ©槃达中国
方案设计团队：Penda China / 槃达中国
Project name: Wenming East Tunnel Entrances
Location: Jiangdong New District, Haikou, Hainan Province, China
Project size: 2720m (East-30*60/West-15*60)
Principal designers: Sun Dayong & Wan Shuyan
Design team: Penda China
LDI: Shanghai Tunnel Engineering Railway Traffic Design & Research Institute
Photographer: Xia Zhi