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重庆市广泛分布泥岩、页岩、泥灰岩等易风化地层。公路路堑切坡多采用坡率法,导致坡表的表层破坏现象比较突出,不仅给养护工作带来长期影响,而且可能威胁整体稳定。根据两巫路巫溪段高切坡表层破坏来看,高切坡表层破坏主要有风化碎落、局部掉块和局部滑塌等类型,而且切坡后短时间即发生严重的表层和局部破坏现象,若不予以有效处置,则难以一劳永逸地解决养护和长期稳定性问题。竹筋喷射混凝土、铁丝网喷射混凝土和钢纤维喷射混凝土3种处置措施,既避免了素喷混凝土封层耐久性有限的不足,且不会大幅增加投资,是解决坡表风化碎落和局部稳定问题的有效手段。
Chongqing is widely distributed mudstone, shale, marl and other susceptible stratigraphy. Cutting slope slope cutting method is often used, leading to the surface of slope surface damage more prominent, not only to bring long-term conservation work, but may also threaten the overall stability. According to the surface damage of the high cutting slope of Wuyi section of Wugu Road, the surface damage of high cut slope is mainly of the types of weathered crushing, local block dropping and local sliding, and serious surface and local damage occur shortly after cutting slope Phenomena, if not effectively addressed, will make it difficult to solve the problem of conservation and long-term stability once and for all. Bamboo tendon shotcrete, barbed wire shotcrete and steel fiber shotcrete three kinds of measures, both to avoid the limited durability of prime sprayed concrete sealing shortcomings, and will not increase the investment is to solve the slope table weathered fragmentation and local stability issues Effective means.