The only shield structure construction section of the central Yunnan Yunnan Diaration Project is smoothly connected

Author:Chinese water conservancy Time:2022.06.27

On June 21, the national key water conservancy project undertaken by the China Railway Fifth Bureau was successfully connected in Longquan's drainage project in Central Yunnan, marking major progress in the construction of central Yunnan water diversion projects.

Longquan inverted siphon is the only project in the urban area to use the shield method construction in the urban area. It is the first time in the construction of the water conservancy project in Yunnan Province. Its dug into 5071 meters, passing through the main urban area of Kunming, densely fabricated pipelines, and many surrounding buildings, especially through the Kunming Metro Line 2 and Panlongjiang. The construction settlement control requirements are high. Special test of the pressure of shield key components. The complex and changeable geological conditions increase the difficulty of long -distance excavation; the deepest deep burial deep in the tunnel is 83 meters, and the pressure of the soil and soil is high, which is a major test for the waterproof sealing system.

Since the start of the shield machine on August 1, 2020, the construction unit has adopted targeted measures for the continuous special circumstances to achieve "zero pollution" and "zero sedimentation". The major source of risks, accurately control the shield machine to dig out through the three 300 -meter small radius curve turns, set a record of 83 meters of super deep buried soil pressure balancing shield construction in China.

The water diversion project in Central Yunnan is the iconic project in the 172 water conservancy projects determined by the State Council. It is also the largest investment scale and the most difficult construction project in Southwest China. After the completion of the project, the dry flow of the Jinsha River with relatively abundant water volume can be diverted to the central Yunnan region, which effectively alleviates the contradictions between urban production and living water in central Yunnan, improves the ecological and water environment of the river and plateau lakes in the area. Fully promote the sustainable economic and social development of Yunnan.