8Mohammad N, Sanjiv G.Trenchless technology: pipeline and utility design, construction, and renewalEM].New York: McGraw- Hill Professional, 2004: 247-248.
9Francis M, Kwong J, Kalani J, et aI.Comparison of calculated and observed pipeline pullback forces during horizontal directional drilling[C].NASTT No-Dig, New Orleans, Louisiana, 2004.
10Chin W C.Computational rheology for pipeline and annular flow[M]. Boston: Gulf Professional, 2001: 37-67.