The prediction of traveling jet trenching in stiff clay based on the erosion failure mechanism |
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| Authors: | Shusen Zhang Tong Ge Min Zhao Chun Wang |
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| Institution: | 1. School of Mechanical Engineering, Hangzhou Dianzi University, Xia Sha, Hangzhou, Chinazhangshusen119@126.com;3. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, China |
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| Abstract: | The performance of traveling jet trenching in stiff clay was tested. All the key parameters varied in the experiment, including the jet velocity, the shear strength of clay, the diameter of the nozzle, and the translational velocity of the nozzle. The jet–soil interface was found to be an arc. An equation was given to describe the interface. On the basis of the erosion failure mechanism, a new method is presented for predicting jet trenching depth. We first calculated the trajectory of the jet–soil interface and then predicted the distribution of the boundary layer shear stress along the jet–soil interface. The point where the wall shear stress was equal to the critical shear strength of clay was the ultimate trenching depth. The predictive results were found to fit the experimental results well. |
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| Keywords: | Dredging pipeline burying traveling jet erosion |
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