摘要
强风化顺层砂岩边坡具有节理裂隙发育、强度低的特征,导致开挖过程中出现边坡稳定问题。单纯的锚杆锚索支护无法满足边坡稳定性需求,在现场抗滑桩施工困难的情况下,选用经济、高效、施工便利的锚筋桩结合锚杆锚索对强风化顺层砂岩边坡进行支护。针对强风化砂岩破碎且强度低的特性,考虑高压注浆的劈裂作用,通过FLAC 3D数值模拟进行方案比选,得到适用于强风化砂岩边坡的锚筋桩多角度交叉布置方案。根据试验段边坡锚筋桩监测数据,分析强风化顺层砂岩边坡锚筋桩作用机理,验证了多角度交叉布置锚筋桩对强风化顺层砂岩边坡的加固效果。
Strongly weathered bedding sandstone slope has the characteristics of joint fissure development and low strength,which lead to the problem of slope stability during excavation.Simple anchor support cannot meet the slope stability requirements in the case of difficult construction of anti-slide piles on site the anchor piles with economical,high-efficiency and convenient construction are combined with anchor bolts to support the strong weathered bedding sandstone slope.For the strong weathered sandstone broken and low strength,considering the splitting effect of high pressure grouting,comparison of schemes by FLAC 3D numerical simulation,obtaining multi-angle cross layout scheme for anchor piles suitable for strongly weathered sandstone slope.According to the test section slope anchor pile monitoring data,it analyzed the action mechanism of anchor piles in strongly weathered bedding sandstone slope,and the reinforcement effect of multi-angle cross-arranged anchor piles on strong weathered bedding sandstone slopes was verified.
作者
陈宇辉
王保田
叶琼瑶
米德才
杨礼明
邓胜强
CHEN Yuhui;WANG Baotian;YE Qiongyao;MI Decai;YANG Liming;DENG Shengqiang(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098 China;Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,Nanjing 210098 China;Guangxi Communications Design Group Co.,Ltd.,Nanning 530029,China)
出处
《粉煤灰综合利用》
CAS
2020年第2期15-20,共6页
Fly Ash Comprehensive Utilization
基金
国家自然科学基金项目(51778211)
江苏省自然科学基金项目(BK20171434)。
关键词
锚筋桩
强风化砂岩
边坡支护
现场试验
anchor pile
strongly weathered sandstone
slope supporting
field test
