1. 深中通道大型海域地下互通设计关键技术.
- Author
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秦辉辉, 徐国平, and 黄清飞
- Subjects
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ARTIFICIAL islands , *STEEL pipe , *SANDSTONE , *RAILROAD tunnels , *BRIDGE foundations & piers , *TUNNELS , *SHEET-steel - Abstract
Based on the design practice of the interchange between Shenzhen-Zhongshan Link and the airport — the first large underground interchange in the sea in China, the paper investigates the key design technologies in view of the project characteristics, such as the interchange hub selection, bridge and tunnel conversion, construction operation, operation guarantee, complex hydrogeology and surrounding constraints. The results show that: 1) A large underground interchange in the sea is adopted to effectively solve the traffic conversion demand of airport hub under complex conditions. 2) The scheme of a "one body with two wings" artificial island and double-row steel sheet pile short cofferdam is adopted, which effectively solve the conversion of large underground interchange with the tube tunnel, construction on land and the operational support needs. 3)A supporting structure of impact-cone cast-in-place pile + pilot-hole with clay replacement and high-pressure jet grouted pile is adopted, which effectively solve the construction of foundation pit in complex marine silt with riprapped rock and sand fill and water-stopping problem. 4) A locking steel pipe pile integrated enclosure scheme is adopted, which provides effective protection for the highway bridge piers during the construction of the artificial island and the excavation of the foundation pit. 5)A double exhaust shaft scheme is adopted, which effectively solve the problem of building of longitudinal through exhaust ducts in ramp tunnels in complex marine environment. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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