Architects:AESEU Architectural Technology and Art studio

Area:800m²

Year:2019

Photographs:Timeraw Studio,ATA studio,Zhongning

Lead Architect:Zhu Li

Landscape Design:Hassell studio（shanghai）

Construction:Tangshan Branch of Nanjing West Road and Bridge Group Co., Ltd

Design Team:Zhu Li, Jiajun Wang

Client:Nanjing Tangshan Construction Investment Development Co., Ltd

Structure And Mep:Southeast University Yi Gou studio，The Fifth Institute

City:Nanjing

Country:China

Project Background. "Building a bigger restroom in this area."-This is the initial request I received when I was brought to this site by the first party in 2017. Nanjing Tangshan Ancient Ape Cave Scenic Area is famous for the discovery of ancient ape ruins and has always been a famous tourist attraction in the suburbs of Nanjing. There is a flood channel that runs east and west on the theorem slope of the mountain range because of the topography of the mountain range, which is the source section of the Tangshui River, the mother river of Tangshan. The project is located at the bottom of the northern slope of the mountain, the only narrow area left between the floodway and the city road. Limited by the cramped land use, the scenic area has been plagued by outdated service facilities issues. This project aims to move the humble ticket office and management office next to the original parking area of the scenic area to a larger site, and build a public restroom in the scenic area.

The memory of the place. It seems that the simple assignment, namely, the relocated ticket office and the expanded toilet, is overwhelming. Is it possible to go beyond the immediate function and find a way with more regional characteristics and contemporary value, so that users can gain an impression of the venue during the experience? We intend to learn from the "indigenous people" on the site. Bamboo forests and canals are the most significant and common features of the site, especially the canals. Due to the need for flood control, the walls on both sides are made of high rough stone retaining walls, moss and water stains on the rough stones, and the furrows seem to be a secret place under the shadow of plants. Since the drainage canal is converted into an underground bypass in the main entrance square, its presence is almost imperceptible. But there are two impressive places on this humble site: one is the management office across the flood channel, which is a straightforward and vivid attempt to break through the limitations of the site and achieve the construction of crossing the canal; The other is the employee's e-bike shed, which consists of steel columns, truss arches, and wooden purlins and rafters in a simple and clear structure, which complements the forest passing through the surrounding area. These two artificial traces reveal a revelation: nature is a landscape because it interacts with people in the venue. Therefore, the design team decided to retell these spatial forms that condensed the memory of the place to new users, and the resulting space is the users’ experience of place memory through themselves.

Order and Direction. After on-site investigation, we judged that there are two pedestrian streamlines on this site: one is across the canal, it was mainly the crowd from the parking area that entered the site; The other is the crowd from the main entrance square of the scenic spot entering the venue. How can these two near-vertical streamlines be only 20 meters from end to end to create an interesting interweaving on this limited field? In the design, we made full use of the cluster of bamboo bushes in the ditch and the canal and uses the method of the folding gallery in the garden that uses twisting, and masking to create three streamlines parallel to the canal. The three of them are the rest and waiting for the streamline on the north side of the canal, the streamline to the toilet along the south side of the canal, and the internal office streamlines close to the bamboo forest respectively. In response to the streamline from the entrance of the scenic spot, some of the volumes of the building has been twisted at a small angle in the east-west direction, resulting in some space with a blurred sense of direction, and the collision between the building volumes of different orders also interferes with visitors' perception of spatial order to some extent, thus producing a different sense of experience.

Canal. The element of the canal was originally a neglected supporting role in the field. But the canal will become a landscape if people can interact with it. The design creates a variety of spaces around the canal that can be used: at the end when the canal turns into a culvert, the user can see the whole picture of the canal and the architectural space hidden in the plants. Under the steel corridor along the canal, a row of benches leans against the root of the long wall, and the canal becomes an object of appreciation. On the other side, under the bamboo groves reserved, there are two corner benches for people to have a rest. It's very comfortable to lie down here in the afternoon. Crossing the canal, it relies on a lantern-shaped corridor bridge, which echoes the management room that has crossed the canal. The corridor bridge composed of steel and U-shaped glass blurs people's sense of direction and space. It seems that crossing the channel is like entering a strange field. It's like the secret place I saw when I first opened the bush. What I hope to bring to later users is not boring at a glance.

Wall. In order to enrich the visitor's experience in the place, it is an effective way to divide the space into pieces, and a wall is an important object. Various forms of sheet walls are used throughout the site which connects the architectural space to bamboo forests and canals. The wall allows the space to be both separate and fluid. To the north of the canal is a long rammed earth wall that isolates the site from the hustle and bustle of the parking area and city roads, leaving only a small entrance, which both hints at the horizontality of the site behind it and forms a strong identity. On the south side of the site, a long rubble wall separates the interior space from the dense bamboo forest, and the vertical windows on the wall and the gap between the building's herringbone roof infiltrate the bamboo shadow into the interior space. The two long walls, north, and south, seemed to outline a garden beside the bamboo canal at the foot of the mountain. The walls in the garden are various, long or short, turning, framing, rough, or hazy. They become the backboard of plants or the canvas of light and shadow.

Local construction. The construction of a building records local and contemporary information all the time in the aspect of structure, materials, and construction, so construction according to the environment and local construction is not the same. In common sense, it can be called on-site construction which uses easily available materials and controllable construction methods, and also apply construction components that are easily maintained and replaced. Through this construction process, people and places have certain intrinsic connections that beyond appearances. Lifting and ramming are the keys to this construction on the narrow side of the canal. The pitched roof of the building adopts the form of a small size of triangular steel roof truss, the connection between the roof truss and the column is a hinged connection, and the roof truss is prefabricated in the factory and hoisted on site, and then welded with tie rods on-site to resist side thrust, which is for the consideration of precise construction under on-site construction conditions. The structural layers of steel purlins, glued bamboo rafters, and glued bamboo panels on the triangular roof truss make the construction show a clear ‘construction’ trace, which is a response to the original carport on the site. The corridor connecting these modern sloping roof buildings is a cross-shaped steel column with a section of 112*112, supporting a steel beam glass roof with bamboo poles shading louvers. In order to resist torsion, a small flange is welded at the web end of the cross-shaped steel column, and the cavity formed thereby is filled with glued bamboo to make the column body appear thinner. These structures present a clear state of force, which complements the sense of force reflected by the bamboo poles in the bamboo forest around the site.

Ramming is a general term for ramming and masonry, which are used for the construction of rammed earth concrete walls and rubble stone walls respectively. The rammed earth-mixed concrete wall is made by mixing soil, sand, gravel, and cement in a certain proportion in the formwork, placing reinforcement, and finally tamping layer by layer with a hand-held pneumatic rammer. Compared with a traditional rammed earth wall, rammed earth concrete wall has higher strength and better moisture resistance. However, the masonry of rubble walls focuses on the use of concrete components in the wall foundation, lintel, coping, corner protection, and other parts. This process of chopping traces on stone mortar, which rose in the 1970s and 1980s, has been rarely used by construction teams. Like rammed earth walls and rubble masonry. it is full of uncertain handcraft. The workers on the construction site have creatively used more convenient electric grinding wheels to replace the traditional axe when dealing with the side and top surfaces of the chop axstone. In this project, we emphasize the coexistence of controlled construction and encourage random construction, both of which are regarded as the components of construction according to the environment.

From completion to use. The project was completed in 2019, and the originally envisioned function was the ticket office and public restroom, for which a tidal toilet area was specially set up (normally closed), and can be flexibly integrated into the men's or women's toilet during peak hours, so as to solve the problem of difficulty in toileting during peak hours. But at the end of 2019, the outbreak of COVID-19 strands the plan of tourist stations for 3 years. The position of the scenic spot has also changed greatly in these three years. The entrance area at the foot of the mountain is all open to the surrounding community residents as an urban park, the building is changed to the tourist rest bar and property management room in addition to retaining the restroom, but the structure of the building gives it a very adaptable space to adapt to the new adjustment. I am particularly impressed by my visit to it after its completion. As no one uses it, all kinds of plants begin to diffuse into the building, and the whole building presents a simple and wild state. During summer vacation, I sat quietly beside the canal, surrounded by blue sky, light and shadow, earth and stone, and plants, as if I were in Dali. I am very grateful that Hassell, the landscape design company of the city park, has made a very professional connection with the architect, given great respect to the architectural concept, and responded very friendly to the architectural elements. As a result, a design that transcends the short-term functional requirements is passed down one by one. From the earliest site houses to new buildings and to new landscapes, we are all narrators of site memory.

Towards ‘Helou Xuan’. ‘Helou Xuan’ is an architectural production of Feng Jizhong, a famous architect, in Shanghai Songjiang Fangta Garden. In terms of function, it is an ordinary tea pavilion for tourists to have a rest and play chess. But in form, it is a modern building. As for why it can resonate with many Chinese architects, I think different people have different answers. The inspiration for me is that architects did not fall into the tangle of the identity of Chinese architects and Chinese architecture when creating, but created a contemporary and local architectural form in a relaxed, light-hearted, and handy way. It is worth trying to understand ‘Helou Xuan’ as an attitude we stick to in architectural design.

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Project location

Address:Tangshan, Jiangning District, Nanjing , China