研究目的：针对云桂铁路大菠萝黑路堑边坡滑坡，在现场地质调绘、钻探、物探及工程测试等综合勘探的基础上，从工程地质环境、采空区影响、降水及施工影响等几方面对该滑坡的成因机制进行分析研究，并提出防治对策，为类似工程提供借鉴。 研究结论：1）路堑工程边坡滑坡的产生主要受地层岩性及采空区的影响，特殊沉积环境下形成的砂岩、泥岩等膨胀岩，成岩作用差，力学强度低，受人为洞采影响形成扰动圈进一步降低了该区域地层的力学强度；（2）现场岩土体力学参数较施工图指标降低较多，岩体下滑力大于抗滑桩的抗滑力，造成第一排桩倾覆变形，第一级边坡滑动后，使第二排桩锚固段减小，致使第二排桩倾斜变形，最终形成工程边坡滑坡；（3）该工程边坡滑坡的破坏形式，下部表现为推移式破坏，而上部呈现为拉裂式破坏；（4）对该工程滑坡的整治，应在滑坡体上部清方减载的基础上根据力学指标合理布设抗滑桩，并辅以地表水及地下水的疏排措施的综合方案；（5）本研究结论对类似地质条件下的铁路及公路工程深路堑地段的勘察和施工具有借鉴意义。

Research purposes： Based on the comprehensive surveys of the engineering geological investigation, drilling, geophysical prospecting and engineering test, analyzed systematically the genetic mechanism of Daboluohei landslides for Kunming-Guilin Railway by means of researching the engineering geological environment, mined-out area influence, rainfall and construction and so on, and proposed the treatment measures of the landslide. This paper put forward the treatment measures and analysis methods with the reference to the similar projects. Research conclusions：（1）The landslide formation was mainly affected by the stratigraphic lithology and mined-out area, the dilative rocks such as sandstone and mudstone which formed under the special sedimentary environment had the characteristics of poor diagenesis and low mechanical strength, and the disturbance ring which formed because of the mined-out area further reduced the mechanical strength of the regional stratigraphic lithology. （2）The in-situ rock strength parameters were low more than the parameters of working drawing, the slide force of rock mass is greater than the resistant force of the anti-slide piles, and it caused the first row piles overturning deformation. After the first level excavation slope slid, it resulted in the anchoring depth of the second row piles decreased short more than previous environment, and caused ultimately the second row piles inclination and deformation, and in the end the engineering landslide formed.（3）The failure modes of the engineering landslide presented the over-type damage of its low part and crack-type damage of its upper part. （4）For the treatment measures of the landslide, first cut upper part of the landslide, and then design reasonably anti-slide piles by the mechanical index, at last set up the drainage measures of the surface water and underground water.（5）The research conclusions can be widely applied in the survey and construction of cutting slope in similar geological condition of railway and highway.