输电线路含碎石粘性土边坡滑坡特性及预防措施

滑坡问题具有普遍性和严重的危害性。在我国南方地区, 含碎石粘性土边坡失稳是输电线路边坡滑坡的主要类型。含碎石粘性土滑坡按诱发因素分为堆载诱发型、坡脚开挖诱发型和自然型滑坡3 类。针对3 类滑坡的特性, 在输电线路工程设计中应“治坡先治水”。具体预防措施有加强排水、基础选型优先选用原状土基础、施工弃土远离塔位、铁塔全方位长短腿与不等高基础设计和植被护坡等。

Land Slide Characteristics of Gravel Containing Cohesive Soil Side Slopes and Its Preventive Measures

Land sliding problem is universal and dangerous.In southern China,gravel containing cohesive soil side slope destabilization is the prime land slide type of transmission line side slope.Its causes can be divided into three categories,including piled load induced,slope base excavation induced and natural type.Based on the characteristics of these three types,the principle of "water control before slide treatment" should be followed in construction design.The preventive measures include strengthening drainage,undisturbed foundation is preferred,putting discarded construction soil far away from tower site,comprehensive leg and unequal height tower foundation design,and planting vegetation on the slope,etc.