深厚表土层井壁竖向附加力反演及稳定预测  

The inverse analysis of the vertical additional force and stability forecast of shaft lining for thick alluvium

作　　者：王在泉[1] 卢则阳[1] 张黎明[1] 

机构地区：[1]青岛理工大学理学院,青岛266033

出　　处：《山东大学学报（工学版）》2009年第4期97-101,共5页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金资助项目(50674059)

摘　　要：在深厚表土层中建成的煤矿竖井井壁,开拓和采矿活动或人为疏水造成井壁周围土层固结沉降,土层在固结下沉过程中对井壁外表面施加一个竖直向下的附加力,这一竖直附加力是导致井壁破裂的关键原因.因此,合理确定这一附加力的大小对于分析预测、评价井壁的安全状态有重要意义.为此提出了基于监测信息的应变优化反分析确定附加力的方法,反演了作用在某井壁表土段上的竖向附加力,在此基础上进行了有限元弹塑性数值计算,得到了井壁由弹性进入塑性的发展过程及应力、应变随时间的变化规律,获得了井壁的极限压应变,从而为井壁的信息化监测预警提供了依据.With exploitation, mining and artificial precipitation, the consolidation settlement of the soil around the shaft lining creates a vertical additional force in the thick alluvium, which is the key reason for the rupture of the concrete shaft lining. Therefore, the determination of the additional force has important meaning to analyze and predict the stability state of the shaft lining. A new established method of vertical additional force was put forth by the inverse analysis of strain optimization based on monitored information in-situ, and the vertical additional force in a concrete shaft lining was determined, then the developed process of mechanical state from elastic to plastic in the concrete shaft lining and the change laws of stress and strain were gained, and a limit strain value was put forward for the purpose of monitoring an alarm in-situ.

关 键 词：深厚表土层 井壁 附加力 反演 预测 

分 类 号：U45[建筑科学—桥梁与隧道工程]