摘要
边坡受开挖影响,原有平衡状态被打破,其状态及安全性的掌握十分重要,变形的监测分析在其中起着重要作用。而分期开挖使变形在开挖和非开挖阶段呈现出明显不同的规律,为预先知道分期开挖时边坡变形大小,在考虑变形组成成分的前提下,提出了利用原始监测值,采用数学监测模型将实测变形中的蠕变变形和开挖瞬时变形加以分离的方法,结合开挖因素建立瞬时变形和开挖的关系模型,依照蠕变规律建立蠕变发展模型,可以根据需要对后期开挖变形大小加以预测。给出了具体实施的步骤,并以实例对可行性予以证明,为分期开挖变形预测提供了实用方案。
The previous equilibrium state of the slope is upset because of excavation. Monitoring and analyzing displacement is one of the most important ways to ensure safety of the slope. Stage excavations bring different displacement regulations in the excavation and the non-excavation stage. To forecast the displacement values during stage excavation, a method based on survey displacement data and mathematical monitoring models is put forward to separate the displacement into two parts: creep displacement and instantaneous displacement by excavation. Both monitoring models are established. Then the displacement in next excavation stage can be forecasted by them in this way with the consideration of creep and excavation. Detailed approach and example are given, and can be used in actual stage excavation to forecast the displacement.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第8期1320-1323,共4页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩土工程
边坡
开挖
变形
预测
Excavation
Forecasting
Mathematical models
Slope stability
Soils
