盾构区间端头加固计算书 [复制链接]

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During the construction of shie ld tunnels，support pressure is usually applied at the work face to prevent D3^7y.u<)  
excessive tunneling—induced soil movement or collapse．However，the selection and control of appropriate support 'XofD}dm  
pressure is difficult due to variation of soil conditions and uncerlainty in construction．Support pressure should be OD 3f.fT  
controlled SO that it is not SO low as to cause face collapse and not SO high as to induce ground hogging．Numerical Q7C;1aO  
simulation is employed to study how the soil parameter and ground water affect the support pressure，and to give the
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proper support pressure at the excavation face in a case study． 4*mS y  
Keywords：shield tunnel；excavati‘on face；numerical solution；support pressure

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