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Lining performance optimization of sub-rectangular tunnels using the Hyperstatic Reaction Method
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DOI：10.1016/j.compgeo.2019.103279.png)
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摘要
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Sub-rectangular tunnel cross-sections are commonly used in underground engineering projects. However, very limited studies have dealt with the design of this kind of non-circular tunnels. In this paper, taking a twin-lane metro tunnel as an example, the optimization process of sub-rectangular tunnels in terms of tunnel lining forces is presented using the Hyperstatic Reaction Method (HRM). A series of mathematical functions considering the tunnel shape are used and the optimization of sub-rectangular tunnels shape is deduced. The effect of different parameters, such as the coefficient of lateral earth pressure at rest K-0, Young's modulus E-s of soil, tunnel depth C, surface loads P-0 on the internal forces and shape of sub-rectangular tunnel is then investigated.
Keyword:
Sub-rectangular
Tunnel design
Optimization
Numerical method
Hyperstatic reaction method
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A numerical approach to the hyperstatic reaction method for the dimensioning of tunnel supports
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