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断裂带附近局部构造应力集中作用

问答题
2022-02-26 19:11
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正确答案
A.一般规律
岩体受力变形时,其内所含的结构面会出现应力集中,使岩体内应力状态复杂化。易于发生应力集中的部位往往是裂隙、断裂的端点、交汇点、错裂段、拐点、锁固段、分支点等。
B.局部应力集中区与活动断层的关系
上述应力集中的特殊部位往往形成与之相适应的构造带。局部压力集中区,形成局部隆起和挤压型构造,伴强震。反之,局部拉应力集中区形成拗陷和拉裂型构造,伴正断型地震。

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1.地应力是存在于地壳中的未受工程扰动的天然应力,也称岩体初始应力、绝对应力或原岩应力,广义上地应力是指地球体内的应力。

原岩应力,存在于地层中受工程扰动的天然应力称为原岩应力,也称为岩体初始应力,绝对应力和地应力。()
断层等地质构造带附近易发生突出,特别是构造应力集中的部位突出的危险性大。
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断裂带附近局部构造应力集中作用
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在天然条件下,岩体内地应力处于相对平衡状态,当由于河流切割、人工开挖等外部营力改变了岩体的边界条件时,地应力就以应变能的形式释放出来,表现为岩体的变形破坏。当地应力过高时,对岩体力学性质及工程施工造成影响。下列各项与地应力无关的的是()。
在天然条件下,岩体内地应力处于相对平衡状态,当由于河流切割、人工开挖等外部营力改变了岩体的边界条件时,地应力就以应变能的形式释放出来,表现为岩体的变形破坏。当地应力过高时,对岩体力学性质及工程施工造成影响。下列各项与地应力无关的的是(  )。
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