干旱区生态环境知识资源中心(Arid): 西域砾岩砂砾料沥青混凝土心墙坝湿化变形数值分析

Arid

	西域砾岩砂砾料沥青混凝土心墙坝湿化变形数值分析
其他题名	Numerical analysis of wetting-induced deformation of Xiyu conglomerate gravel dam with asphalt concrete core
	邹德高; 杨小龙; 刘京茂; 孔宪京; 周扬
来源期刊	大连理工大学学报
ISSN	1000-8608
出版年	2015
卷号	55 期号:6 页码:605-611
中文摘要	我国新疆地区广泛使用西域砾岩砂砾料作为筑坝材料,由于西域砾岩砂砾料浸水后易软化、崩解,大坝蓄水后的湿化变形分析成为工程界广泛关注的问题.联合广义塑性模型和西域砾岩砂砾料湿化模型,对某沥青混凝土心墙坝进行了湿化变形有限元分析.结果表明:广义塑性模型和西域砾岩砂砾料湿化模型能够很好地反映大坝湿化变形及应力分布规律;上游蓄水湿化使坝体向上游方向的水平位移和沉降都增大,最大水平位移由竣工时的1.5 cm增至22 cm左右,最大竖向沉降由竣工时的0.17%坝高增至0.53%坝高,筑坝料的湿陷使心墙的变形也增大;西域砾岩砂砾料的湿化变形明显大于花岗岩堆石料,最大竖向沉降是花岗岩堆石料的近3倍,其湿化造成坝顶上游侧出现局部拉应力区,有可能导致坝顶出现裂缝.因此,在新疆干旱地区采用西域砾岩砂砾料筑坝时考虑蓄水时的湿化影响是十分必要的.
英文摘要	Gravel from Xiyu conglomerate, which is easily softened and disintegrated when inundated, is widely used as filling materials of dam in Xinjiang region of China. Therefore, the wetting deformation problem of earth dams during the reservoir filling is a serious concern in engineering field. The generalized plastic model and wetting model based on the wetting tests of Xiyu conglomerate gravel are incorporated into procedure, and numerical analyses of wetting-induced collapse of an asphalt concrete core dam are performed. Analytical results show that the generalized plastic model combined with the wetting model can well reflect the wetting deformation and stress distribution of the dam. Wetting collapse that happened in the upstream shell increases the horizontal displacement toward the upstream direction and settlement significantly, the maximum horizontal displacement increases from 1.5 cm to as much as 22 cm and the maximum settlement increases from 0.17% to 0.53% of the dam height, which leads to the significant deformation of the asphalt concrete core. Wetting deformation of Xiyu conglomerate gravel is apparently larger than the granite rockfill, for the maximum settlement is nearly 3 times of that of the granite rockfill. Particularly, small tensile stress is observed around the dam crest, which may result in cracks nearby. Therefore, close attention should be paid to the wetting deformation during reservoir impoundment for dams filled with Xiyu conglomerate gravel in Xinjiang arid region.
中文关键词	广义塑性模型 ; 湿化变形 ; 西域砾岩砂砾料 ; 数值分析
英文关键词	generalized plastic model wetting-induced deformation Xiyu conglomerate gravel numerical analysis
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Construction & Building Technology
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:5575398
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232462
作者单位	邹德高, 大连理工大学, 海岸和近海工程国家重点实验室, 大连, 辽宁 116024, 中国.; 孔宪京, 大连理工大学, 海岸和近海工程国家重点实验室, 大连, 辽宁 116024, 中国.; 杨小龙, 大连理工大学水利工程学院, 大连, 辽宁 116024, 中国.; 刘京茂, 大连理工大学水利工程学院, 大连, 辽宁 116024, 中国.; 周扬, 大连理工大学水利工程学院, 大连, 辽宁 116024, 中国.
推荐引用方式 GB/T 7714	邹德高,杨小龙,刘京茂,等. 西域砾岩砂砾料沥青混凝土心墙坝湿化变形数值分析[J],2015,55(6):605-611.
APA	邹德高,杨小龙,刘京茂,孔宪京,&周扬.(2015).西域砾岩砂砾料沥青混凝土心墙坝湿化变形数值分析.大连理工大学学报,55(6),605-611.
MLA	邹德高,et al."西域砾岩砂砾料沥青混凝土心墙坝湿化变形数值分析".大连理工大学学报 55.6(2015):605-611.