城市轨道交通隧道周边地下管线变形预测研究

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Abstract Through summarizing the monitoring results，it is pointed that when the pipeline rigidity is large，and the settlement between pipeline and formation is large. The general deformation law of underground pipeline is basically the same to the move of stratum. When the pipeline is vertical above the tunnel，the settlement curve fits to the normal distribution. The Peck formula for ground surface settlement prediction in tunnel engineering is corrected，and the pipeline settlement prediction formula is established. Combining the former research results of stratum loss rate ，the reference value of pipeline settlement trough width parameter is calculated. The result of numerical simulation shows that the deformation of pipeline parallel above the tunnel is more than vertical above the tunnel，and the pipeline settlement prediction formula may preliminarily evaluate the deformation of pipeline parallel above the tunnel. The rigid pipeline longitudinal strain calculation formula may also be modified to get the pipeline deformation. The engineering application proves that the pipeline settlement prediction formula，numerical simulation and monitoring results are in good agreement，and the pipeline settlement prediction formula is good in application.

Key words： tunnelling engineering urban rail transit underground pipeline deformation prediction

Received: 24 May 2012

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3592

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