以鄂北调水工程某高膨胀土滑坡为例,开展了现场探槽取样试验、室内物理力学试验及室内CT试验,揭示了滑坡主要是裂隙强度控制下的膨胀土边坡失稳。针对探槽揭示的滑动面的分布特征,论述了伞形锚技术的加固机理、加固方案、施工工艺等,通过现场监测资料可知,采用伞形锚加固后,在后期开挖及施工过程中滑坡是稳定的,从而验证了伞形锚加固方案的合理性。 Taking a high expansive soil landslide in the northern part of Hubei Province as an example, a sampling test, an in-house physical and mechanical test and an indoor CT test were conducted to reveal the instability of the expansive soil slope under the control of the fracture strength. According to the distribution characteristics of the sliding surface revealed by the trenches, the reinforcement mechanism, reinforcement scheme and construction technology of the umbrella-shaped anchor technology are discussed. Based on the field monitoring data, after using the umbrella anchor to reinforce, the landslide during the later excavation and construction Is stable, thus verifying the rationality of umbrella anchor reinforcement scheme.