Reasonable Design Method for Reinforced Slope Cutting

加筋边坡切削的合理设计方法

基本信息

批准号：
01550388
负责人：
MATSUI Tamotsu
金额：
$ 1.34万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550388/
关键词：
Failure Finite Element Method Limit Equilibrium Method Reinforcement Slip Surface Slope Stability 切土斜面設計法

项目摘要

Reinforcement mechanism and stability characteristics of reinforced slope cutting were studied both experimentally and analytically to establish a reasonable design method for reinforced slope cutting.A hybrid slope stability design method for reinforced slope cutting was proposed. The proposed method is a kind of hybrid method of the finite element method and limit equilibrium method, in which the potential failure slip surface of a slope is defined as the failure shear strain zone, according to strain failure criterion, being developed from the toe to the top of the slope tracing by shear strength reduction technique, and the safety factor of the slope is defined as the invert of the average stress level, according to stress failure criterion. Analytical results showed that the safety factor and the failure pattern obtained from the proposed hybrid method were quite close to those from the Bishop's method.In order to verify the hybrid method for reinforced cut slope stability analysis, two full scale field tests on reinforced cut slopes in residual soil were performed. The predicted behavior of the reinforced slope cutting by the hybrid method agreed with the field test data and site observation. Based on the analytical results and field measurements, a modified Fellenius' method for reinforced slope was also proposed. Agreement between the hybrid method and the modified Fellenius' was found to be satisfactory. Consequently, applicability of the hybrid method to the practical in-situ reinforcement slope stabilization was demonstrated in success. Also, the modified Fellenius' method can be applied as a simplified method.

在实验和分析上研究了增强坡度切割的增强机制和稳定性特征，以建立一种合理的设计方法，用于增强坡度切割。提出了用于加固坡度切割的混合斜率稳定性设计方法。提出的方法是有限元方法和极限平衡方法的一种混合方法，其中斜率的潜在故障滑动表面被定义为根据应变破坏标准，从脚趾到顶部通过剪切强度减少强度的技术以及坡度的安全因子的安全因子，根据平均应力级别，根据剪切强度的压力因素，从坡度痕迹到顶部，根据平均应力级别，根据平均应力级别，该斜坡的安全因子是平均级别的。分析结果表明，从提出的混合方法中获得的安全系数和故障模式非常接近主教方法的安全系数。通过混合方法切割增强斜率切割的预测行为与现场测试数据和现场观察一致。根据分析结果和现场测量，还提出了一种修改的Fellenius加固坡度的方法。发现混合方法与修改后的Fellenius之间的一致性令人满意。因此，成功证明了混合方法在实用的原位增强斜率稳定上的适用性。同样，修改后的Fellenius方法可以作为简化方法应用。