In allusion to big mould construction of earthwork project, this article tells about the problem of the cooperation of grab and tip car with practical projects as researching object.

• 针对大型土石方工程施工中,挖掘机与倾卸车的配套组合问题,用实际工程项目作为研究对象,运用排队论的原理和方法,得到一种对机械化施工有益的方法