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淹沒水射流土層擴孔方程

Equation of soil bore enlarging with submerged water jet and experimental study

  • 摘要: 運用水射流理論與土力學理論,建立了水射流土層擴孔方程.基于室內模擬實驗,研究了射流參數與擴孔效果的關系,并驗證了水射流土層擴孔方程的正確性.結果表明,增大射流流量比增大其壓力對擴孔效果的提高更有效,實驗參數βs主要與擴孔時鉆桿的運動有關.

     

    Abstract: The equation of soil bore enlarging with water jet was established based on the water jet theory and soil mechanical theory. Through indoor simulation test, the relationship between water jet parameters and bore-enlarging effect was studied. The results showed that the equation of soil bore enlarging with water jet is correct. Increasing the water jet flow quantity has more obvious effect on bore enlarging than increasing the water jet pressure. The experimental parameter βs is mainly related to the lifting speed and the rotational speed of the drill pipe.

     

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