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该文结合具体的工程案例,在分析造成偏位原因的基础上,采用静力学原理和钻探工艺本身来起拔护筒和埋设护筒,并获得成功,同时还获得了具有工程参考意义的钢护筒与砂卵石之间的摩擦系数值μ=25303.14kN/m2。
Based on the analysis of the cause of deviation, the article adopts the principle of statics and the drilling technology itself to draw the protection cylinder and the buried casing, and obtains the success. At the same time, it also obtains the steel which has the engineering reference meaning The coefficient of friction between casing and sand and gravel μ = 25303.14kN / m2.