膨胀岩土路堑边坡失稳防护

Instability and protection of dilatational rock and soil cutting slope

膨胀岩土的胀缩性、裂隙性与超固结性等内在因素和包括气候变化、地下水位变动和开挖卸荷应力释放等的外在因素共同诱发了膨胀岩土路堑边坡的稳定问题,其破坏类型包括湿化性失稳—表层溜塌滑移与风化性失稳—局部坍塌滑动的两大形式,因此,膨胀岩土暴露坡面的防护对策需要合理配置坡面防护技术、坡面稳定构造以及截排水系统。

The stability of the expansive soil cutting slope is caused by the internal factors such as expansion and shrinkage,fracture and overconsolidation,as well as external factors such as climate change,groundwater level change and stress release from excavation unloading.The failure types include two major forms of wetting instability-surface sliding and sliding and weathering instability-local collapse and sliding.Therefore,the protective measures of the exposed slope surface of expansive rock and soil should be rationally configured with slope protection technology,slope stability structure and drainage system.