基于测斜数据的抗滑桩工作状态评价

EVALUATION OF STATE OF ANTI-SLIDE PILES BASED ON INCLINOMETER DATA

在抗滑桩上设置测斜管,对抗滑桩的侧向位移进行监测,然后用测斜数据来反演分析抗滑桩的内力,再与抗滑桩的设计内力相比较,就可以知道抗滑桩的工作状态。抗滑桩的工作状态可分为安全、临界安全、非安全3种状态,安全状态下抗滑桩尚有一定的安全余度;临界安全状态下抗滑桩完全发挥了作用,处于最经济的设计安全余度,需要加强监测,密切关注下一步发展;非安全状态下抗滑桩达不到设计的安全要求,可能出现抗滑桩的破坏,必须加强监测,必要时实施新的加固措施。对工程实际中的抗滑桩进行监测,由测斜数据反演分析可知,抗滑桩处于安全工作状态。

The lateral displacements of anti-slide piles are monitored using inclinometer.The internal forces of anti-slide piles were estimated through back analysis of the lateral displacement and then compared with the design internal forces.The operation state of the anti-slide piles could be deduced from the internal forces,which may be divided into the stable state,the limit security state and the instable state.In the stable state,the anti-slide pile still contains certain margin of safety;in the limit state,the anti-slide pile fully plays its role,and it is in the critical state of invalidation;in the instable state,the anti-slide piles cannot meet the required standard,which may lead to the failure of the anti-slide,therefore,the monitoring should be strengthened and the new reinforcement measure is needed.The anti-slide piles in project are in the stable state by back analysis based on data.