通过对气力输送技术和摩尔-库仑理论的研究,借鉴目前国内外先进的钻尖结构,设计了一种适用于市政道路非开挖干法输送泥屑的非对称断屑槽变螺距螺旋面的新型钻头。通过实验,验证了采用非对称断屑槽变螺距螺旋面钻头对一般土层进行切削,可以得到气力输送所期望的碎泥屑,为干法气力输送泥屑奠定了技术基础。 Based on the research on pneumatic conveying technology and Mohr-Coulomb theory and drawing on the advanced drilling tip structure both at home and abroad, a new design method of asymmetric chip breaker slotted helix New drill. Through experiments, it is verified that the asymmetric chip breaker with variable pitch helical drill bit can cut the common soil, which can get the expected debris flow of pneumatic conveying and lay the technical foundation for the dry pneumatic conveying of the debris.