摘要
随着我国高心墙堆石坝在复杂地质条件下的不断建设和投运,大坝变形对坝高及覆盖层等边界因素的响应特性成为工程关注的热点问题。为此,根据已建多座高心墙堆石坝坝型特征、坝体、地基材料力学参数及覆盖层情况,按照不同坝高与覆盖层厚度拟定了20种计算数值仿真方案,探求了在复杂地基下高心墙堆石坝坝体变形特性及量值与边界条件之间的响应关系。结果表明,坝高及覆盖层与大坝变形大体呈正相关响应,对大坝沉降变形的影响大于水平向,但响应关系会随着坝高和覆盖层之间的比例变化有所不同。在一定坝高时当覆盖层超过一定厚度后增量影响效果明显衰减,当覆盖层较深时坝高增加到一定量值后增量效应也会降低。
With the continuous construction and commissioning of high-core rockfill dams under complex geological conditions in China,the response characteristics of dam deformation to boundary factors such as dam height and overburden have become hot issues of engineering concern.To this end,based on the characteristics of the dam type of high core rockfill dams,the mechanical parameters of the dam body and the foundation material,and the overburden conditions,20 kinds of calculation numerical simulation schemes are proposed according to different dam heights and overburden thicknesses.The relationship between the deformation characteristics and the value of the dam body of the high core rockfill dam and the boundary conditions under complex foundation is explored.The results show that the dam height and the overburden are positively correlated with the dam deformation,and the impact on the dam settlement is greater than the horizontal direction,but the response relationship will vary with the variety of the ratio between dam height and overburden.When the overburden exceeds a certain thickness,the effect of the increment is obviously attenuated under a certain dam height.When the dam height is increased to a certain value under a deep overburden thickness,the incremental effect will also decrease.
作者
袁上丰
陈建康
张瀚
王万千
卢祥
周正军
YUAN Shang-feng;CHEN Jian-kang;ZHANG Han;WANG Wan-qian;LU Xiang;ZHOU Zheng-jun(State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China;College of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China;China Energy Group Dadu River Hydropower Development Co.Ltd, Chengdu 610047, China;Chengdu Engineering Corporation Limited, Chengdu 610072, China)
出处
《中国农村水利水电》
北大核心
2020年第3期124-128,共5页
China Rural Water and Hydropower
关键词
心墙堆石坝
坝高
覆盖层
数值模拟
变形特性
影响规律
变形量值
core rockfill dam
dam height
overburden
numerical simulation
deformation characteristics
influence law
deformation value
