鸡鸣三省大桥桥位地质灾害分析及防治
|
摘要
针对鸡鸣三省大桥滑坡灾害问题,基于现场勘察,研究分析滑坡变形特征、形成机理和稳定性。结果表明,赤水河两岸均发育有滑移——拉裂式顺层滑坡,滑坡呈阶梯状多级滑动,滑床逐级抬高,滑坡现状基本稳定。通过优选桥位轴线和纵剖面高程,避开滑坡危害区,并采取基坑边坡开挖预加固、监测等措施,保障桥梁工程安全。
Aiming at the landslide disaster of Jimingsansheng Bridge, the deformation characteristics, formation mechanism and stability of landslide are analyzed based on field investigation.The study shows that there are slip-crack bedding landslides on both sides of Chishui River. The landslides show multi-step sliding with sliding bed lifting step by step,and the present situation of the landslides is basically stable. By optimizing the axes and elevation of the longitudinal section of the bridge, landslide dangerous area is avoided, and by adopting measures such as pre-reinforcement of foundation ditch slope and landslide monitoring, the safety of bridge engineering is ensured.
Aiming at the landslide disaster of Jimingsansheng Bridge, the deformation characteristics, formation mechanism and stability of landslide are analyzed based on field investigation.The study shows that there are slip-crack bedding landslides on both sides of Chishui River. The landslides show multi-step sliding with sliding bed lifting step by step,and the present situation of the landslides is basically stable. By optimizing the axes and elevation of the longitudinal section of the bridge, landslide dangerous area is avoided, and by adopting measures such as pre-reinforcement of foundation ditch slope and landslide monitoring, the safety of bridge engineering is ensured.
引文
[1] 陈乐生,庄卫林,赵河清,等.汶川地震公路震害调查:地质灾害[M].北京:人民交通出版社,2012.
[2] 方向池.大理-保山高速公路边坡与桥梁变形分析[J].中国地质灾害与防治学报,2001,12(3):48-52.
[3] 裴洋,朱中华.绵茂公路某连续T梁桥病害分析及处治[J].现代交通技术,2016,13(4):47-58.
[4] 冯忠居,张永清.预应力锚索技术加固处理滑坡上桥墩偏移[J].西安公路交通大学学报,2001,21(3):39-41.
[5] 元德壬,温博,陈从新,等.彭家湾古滑坡体的破坏机制及处置技术初探[J].武汉理工大学学报(交通科学与工程版),2017,41(2):318-323.
[6] 唐国斌,平瑞锋,梁全富,等.高边坡桥墩倾斜机理分析与安全性评价[J].防灾减灾工程学报,2014,34(4):492-497.
[2] 方向池.大理-保山高速公路边坡与桥梁变形分析[J].中国地质灾害与防治学报,2001,12(3):48-52.
[3] 裴洋,朱中华.绵茂公路某连续T梁桥病害分析及处治[J].现代交通技术,2016,13(4):47-58.
[4] 冯忠居,张永清.预应力锚索技术加固处理滑坡上桥墩偏移[J].西安公路交通大学学报,2001,21(3):39-41.
[5] 元德壬,温博,陈从新,等.彭家湾古滑坡体的破坏机制及处置技术初探[J].武汉理工大学学报(交通科学与工程版),2017,41(2):318-323.
[6] 唐国斌,平瑞锋,梁全富,等.高边坡桥墩倾斜机理分析与安全性评价[J].防灾减灾工程学报,2014,34(4):492-497.