Once deep-buried long tunnel is constructed in soft rock under high crustal stress, rheology of soft rock is an outstanding engineering geology problem.

在高地应力环境下的软弱国岩中修建深埋长隧道，软弱围岩流变一是个突出的工程地质问题。

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Present crustal stress values are high, structural deformation rate is fast, intensity of earthquake has an obvious increasing trend, and terrestrial heat flow anomaly is very obvious.

现代地壳应力值高，构造变形速度快，地震活动强度加剧，地热流异常明显。

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Underground tunnel, high pressure bifurcated pipe, water inlet tunnel designing and their lining style need know crustal stress too.

地下洞室和高压岔管、输水隧道设计及选择衬砌方式，需要查明原地应力状态。

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