天津某公路复杂岩质滑坡勘察及治理对策

Investigation and Treatment of Complex Rock Landslide on a Highway in Tianjin

摘要: 本文以天津某公路K4滑坡为例总结了复杂岩质滑坡勘察方法。采用工程地质测绘、钻探、岩土试验等多种手段的勘察方法，查明滑坡要素和工程地质条件，还原滑坡地貌，利用岩土试验和参数的反分析方法确定滑面的C、φ值。最终查明该滑坡位于断层破碎带部位，由2个次级滑坡组成，岩性复杂。本文对滑坡进行稳定性评价，最后提出削方减载、锚索格构梁、排水系统及长期观测的治理对策，竣工后运行良好。结论可为同类滑坡治理提供借鉴。

Abstract: This paper takes K4 landslide of a highway in Tianjin as an example to summarize the survey methods of complex rock landslide. The investigation methods of engineering geological mapping, drilling, geotechnical test and other means are adopted to find out the landslide elements and engineering geological conditions, restore the landslide landform, and determine parameters C and φ of the sliding surface by geotechnical test and back analysis methods. Finally, it is found that the landslide is located in the fault fracture zone, which is composed of two secondary landslides with complex lithology. This paper evaluates the stability of the landslide, and finally puts forward the treatment countermeasures of cutting and load reduction, anchor cable lattice beam, drainage system and long-term observation. It runs well after completion. The conclusion can provide reference for the treatment of similar landslides.