摘要
为探究邗江区境内河流岸坡生态护坡方案,采用Midas GTS建立典型岸坡计算模型,研究自然生态护坡、全覆盖草皮护坡及四季春护坡3种方案下岸坡稳定系数与孔隙水压力特征。四季春护坡方案下安全系数最高,且该方案下岸坡稳定性受运营期影响最低。降雨强度愈大,则岸坡安全系数愈低,但四季春护坡方案下安全系数受影响最小。岸坡安全系数与降雨时长具有二次函数的负相关关系,自然生态护坡、四季春护坡及全覆盖草皮方案下降雨时长每增大3h,可导致安全系数分别降低5.6%、3.3%、4.7%。降雨强度愈大,则孔隙水压力愈高;自然生态与全覆盖草皮护坡方案中孔隙水压力的增长具有慢-快转变节点,为15 h,而四季春植物护坡下孔隙水压力增长稳定。
In order to explore the ecological slope protection scheme of river bank slope in Hanjiang District,Midas GTS was used to establish a typical bank slope calculation model to study the characteristics of bank slope stability coefficient and pore water pressure under three schemes of natural ecological slope protection,full coverage turf slope protection and four seasons spring slope protection.The safety factor under the four seasons spring slope protection scheme is the highest,and the stability of the bank slope under this scheme is the lowest affected by the operation period.The greater the rainfall intensity is,the lower the safety factor of the bank slope is,but the safety factor under the four seasons spring slope protection scheme is the least affected.The safety factor of bank slope has a negative correlation with the rainfall duration in a quadratic function.The safety factor can be reduced by 5.6%,3.3%and 4.7%respectively when the rainfall duration of natural ecological slope protection,four season spring slope protection and full coverage turf schemes increases by 3 hours.The greater the rainfall intensity,the higher the pore water pressure;The increase of pore water pressure in the natural ecology and full coverage turf slope protection scheme has a slow fast transition node,which is 15h,while the pore water pressure under the four seasons spring vegetation slope protection is stable.
作者
高欣
GAO Xin(Water Resources Bureau of Hanjiang District,Yangzhou City,Yangzhou 225000,China)
出处
《江苏水利》
2023年第1期18-23,共6页
Jiangsu Water Resources
关键词
Midas
GTS
岸坡
生态护坡
邗江区
Midas GTS
bank slope
ecological slope protection
Hanjiang District
