摘要
以建始至恩施高速公路K105+480-K105+600段路基边坡危岩体为研究对象,从工程地质特性及稳定性等方面分析提出了爆破清除、锚索加固和钢轨桩加固3个方案,并利用RocFall软件对潜在落石运行轨迹进行了分析,综合研究后确定采用钢轨桩加固方案。进一步计算分析,采用直径30 cm钢轨桩加固设计,首次采用机械回转钻机进行超大直径岩石取芯,通过岩心管改良保证了取芯的顺利实施。监测结果显示:治理后的危岩体整体稳定,处置设计及施工达到预期,确保了路基整体稳定及周边建筑物的安全。
Taking the dangerous rock masses of the subgrade of K105+480-K105+600 from Jianshi to Enshi Expressway as the research object, three schemes of blasting removal, anchor cable reinforcement and rail pile reinforcement are proposed from the aspects of engineering geological characteristics and stability. The RocFall software was used to analyze the potential rockfall trajectory. After comprehensive research, the rail pile reinforcement scheme was determined. Further calculation and analysis, using the 30 cm diameter steel rail pile reinforcement design, the first use of mechanical rotary drilling machine for super large diameter rock core, through the core tube improvement to ensure the smooth implementation of the core. The monitoring results show that the dangerous rock mass after treatment is stable overall, the disposal design and construction meet expectations, ensuring the overall stability of the roadbed and the safety of surrounding buildings.
作者
李志成
陈诚
徐海云
龚文惠
LI Zhi-cheng;CHEN Cheng;XU Hai-yun;GONG Wen-hui(CCCC Second Harbour Engineering Co.,Ltd.,Wuhan,Hubei 430000,China;College of Civil Engineering and Mechanics,Huazhong University of Science and Technology,Wuhan,Hubei 430000,China)
出处
《中国港湾建设》
2020年第1期21-25,37,共6页
China Harbour Engineering
关键词
危岩体
稳定性
钢轨桩
超大直径取芯
dangerous rock mass
stability
rail pile
super large diameter core
