摘要
应用水平条分法与极限平衡原理研究了条形锚板的极限抗拔承载力、破裂面、土体性质和荷载方向的关系。将破裂面看成是由若干段组合而成的复合破裂面,并沿各段将锚板周围土体水平条分为多块体,在假设岩土体服从摩尔库伦屈服准则条件下,根据极限平衡原理,建立条形锚板极限抗拔承载力的多元函数,利用数学优化方法给出其最优解,从而可以给出条形锚板周围土体的破裂面及其对应的极限抗拔力。计算结果表明:(1)抗拔系数随着内摩擦角、粘聚力和上拔荷载方向角的增大而增大;(2)破裂面随着内摩擦角和粘聚力的增大而向锚板外侧方向移动。
In this paper, the horizontal slice method is used to discuss the relation among the ultimate uplift ca- pacity, the failure surface, the soil parameters and the uplift load direction with M-C yield criterion. According to the limit equilibrium approach, the uplift capacity is calculated by dividing soil around the strip anchor plate into slices with regarding the potential failure surface as a group of several sectional planes. Then the multivariate function used to calculate uplift capacity is established and optimized. An approach presented in this paper can be used to deter- mine the failure surface shape and the magnitude of the ultimate uplift capacity of strip anchor plates. The results in- dicate that ： （ 1 ） uplift coefficient increases with internal friction angle, cohesion and the angle at vertical direction ; （2）the failure surface moves to the outside soil gradually with increasing the intemal friction angle and cohesion.
出处
《地下空间与工程学报》
CSCD
北大核心
2014年第1期122-127,共6页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金(51378441)
关键词
极限抗拔力
破裂面
条形锚板
多块体
ultimate uplift capacity
failure surface
strip anchor plates
multiple blocks
