采用定向钻法建造的某水库坝下涵管在运行几个月后即发生垮塌。通过现场勘察和理论计算,查明了事故原因,从施工工艺、管材选取、工程管理三方面对定向钻法的关键技术进行了深入探讨,提出了相关建议,证明了定向钻法在技术上的可行性,并给出了涵管的补救措施。 The culvert under the dam constructed by directional drilling method collapsed a few months after its operation. Through field investigation and theoretical calculation, the causes of the accident were identified. The key technologies of directional drilling method were discussed in depth from the aspects of construction technology, pipe selection and project management, and some suggestions were put forward to prove that the directional drilling method is technically Feasibility, and gives the culvert management remedies.