Several excellent cases in foreign mine repair

Because the urban infrastructure construction in foreign countries started earlier, the ecological environment problems of the quarry occurred earlier and more serious. Therefore, the research and practice of the ecological restoration of the quarry are correspondingly deeper, and there are many outstanding cases.

Japan's National Akashi Strait Park

Japan’s state-run Akashi Strait Park’s restoration theme is “to bring the park back to life”. Through the “earth art” and “waterscape” techniques, the designer seeks the communication between people and the dialogue between man and nature on the basis of ecological restoration.

Japan’s state-run Akashi Strait Park was originally a large quarry quarry. From the 1950s to the mid-1990s, it provided 1.06 trillion cubic meters of sand for the construction of the Kansai Airport and the artificial islands along the coast of Osaka and Kobe. Stone, excavated to a depth of more than 100 meters, constitutes a bare mountain range of about 140 square kilometers. Beginning in the 1980s, Hyogo Prefecture, where the island is located, commissioned the famous designer Ando Tadao to plan and design, and set up a greening expert committee to restore vegetation. The plan emphasizes restoring the state of nature, forming a good landscape and creating a recreation space for people to serve. The theme is “to make the park a return to life”. The overall goal is first to heal the scars that have been mined in the mountains for decades. The Greening Committee believes that planting must start from seedlings. The tree is difficult to survive in such a harsh natural environment, and the seedlings can go with the flow. Therefore, since 1994, a total of 240,000 seedlings have been planted. And scientific cultivation methods to make this project to fruition, including on the bedrock of a fixed three-dimensional honeycomb mesh metal plates, poured into the new soil covered with straw mat, to conserve moisture. The irrigation system uses embedded polyethylene tubes with a density of 1 m. At the same time, due to the relatively low amount of local precipitation, in order to meet the needs of plant growth, technologies such as collecting surface water and recycling water are used. The rainwater collection pipe is buried under the road. At the same time, the park will become the regional service infrastructure, including international conference centers, star-rated hotels, large greenhouses, and amphitheatre to create a future-oriented leisure venue.

Ecology and landscape restoration in the Biville quarry, France

The Biville quarry in France has the characteristics of large scale, large height difference and serious ecological degradation. It preserves the industrial traces of the site during the transformation and transforms it into a distinctive and iconic place in the new landscape structure, reflecting the local history. Respect for the pulse.

The Biville quarry at the top of the Clairefontaine gorge was shut down in 1989 after 10 years of mining. The quarry is a linear crack with a length of 450m and a uniform width. The 45-degree slope is barren and uneven, with a drop of 20-40m. The designer built it into a recreation area with a 3.5 square kilometer lake. Their philosophy is that they should not deliberately conceal the traces left by the stone mining process, but retain them as site features, just ensuring the coherence of the best locations for the natural restoration of the ecosystem, and then introducing some vegetation to make the abandoned quarry The field returns to a natural state. The retrofit measures included the design of a series of facilities and equipment to direct the flow of water to the valley to form a lake. The lakeshore has been designed to accommodate the most popular leisure activities in the area – fishing. In order to facilitate visitors to enter the bottom of the valley, the wall of the pit is stepped, and each platform has stone blocks fixed on both sides of the platform as a ridge. At the same time, the form of the ladder allows the runoff to flow from the grassland at a high level into the gutter to protect the surface from water impact and erosion. The huge stone walls from the bottom of the valley become the most symbolic sights in the area. Adult trees are planted in strips to resist wind erosion, and each part is planted according to its natural features and topography.

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NOTE:

1. Please contact the corresponding product engineer for specific torque products.

2. Max. rotation speed: 50r/min

3. Max. circle rate: 6 cycle/min(Clockwise360 °, 360 ° anti-clockwise for 1 cycle)

4.Operating temperature: -10~50℃

5.Storage temperature:-30~80℃

Applied torque: (T)

Test Temperature: 23+/-5℃

Rotating speed:20r/min

Durability test Method: Clockwise 360 °, 360 ° anti-clockwise

Rotating speed:20r/min

Test Frequency: 1cycle/min

Test Temperature: 23±5℃

Durability test cycle: 50000cycle

Test result criteria: Store in the room temperature for 24 hours or more after the test, recording to the torque T=T±30%T.

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