泥灰岩边坡倾倒变形机理及处治措施

研究目的:在阿尔及利亚东西高速公路建设期间,多处泥灰岩边坡发生倾倒变形,甚至转化成滑坡,对项目进程造成了重大不利影响,必须研究倾倒变形边坡的机理,分析其稳定性进而实施治理,或在倾倒变形之前实施预加固工程,保证边坡的稳定。研究结论:(1)边坡变形破坏方式受控于边坡本身的内部结构、物理力学性质与外界因素的作用。(2)查明边坡体变形破坏机理和各个不同演化阶段的变形破坏及稳定性程度,针对所处的发展阶段,提出合理的边坡治理措施。(3)治理工程中考虑刷方减载、材料置换、锚固、支挡和排水工程等多方案的组合,选择综合性的治理方案。

Mechanism for Toppling Deformation and Treatment Measures of Marlite Slope

Research purposes: During the realization of Algeria East-West Highway Project,toppling deformation of marlite slope was observed in several places and some slopes were even transformed into landslide,which was unfavorable for project advancement.In this case,it is necessary to research on the mechanism of toppled and deformed slopes and to study their stability,in order to proceed to treatment or pre-consolidation before toppling deformation. Research conclusions:(1) Deformation failure mode of the slope is dependent on the inner structure of slope,the physic-mechanical properties and outsider factors;(2) Studies on mechanism of the slope deformation failure and on slope deformation failure and stability at every different evolution stage are necessary for proposing proper slope treatment measures in accordance with its development stage;(3) Comprehensive treatment proposition,which combines several propositions such as earthwork reliving,materials replacement,anchorage,retaining and drainage etc.,could be taken into consideration during the treatment.