磨料射流切割桩基钢筋性能试验研究

Experimental Study on Performance of Abrasive Jet Cutting Pile Reinforcement

为探究磨料射流有效辅助破障的控制参数范围和高效破障参数组合,基于磨料射流盾构搭载的特征,重点进行大靶距(5 cm以上)、高横移速度(3 m/min以上)和往复切割的后混合磨料射流切割桩基钢筋试验研究,确定了钢筋切割过程的有效参数,并基于射流耗能分析了控制参数对切割效率的影响。研究结果表明,本试验条件下钢筋破坏的临界泵压约为150 MPa,使切割体积达到最大的最佳靶距在5~10 cm,相对于5次切割的结果,20次切割的切割深度效率减少42.5%,切割体积效率减少12.14%。

To explore the control parameters of the effective assistant obstacle breaking by abrasive jet and determine the parameter combination of high-efficient obstacle breaking,an experimental study is conducted on abrasive jet cutting pile reinforcement under the post-mixed conditions of a large target distance of more than 5 cm,high traverse speed of more than 3 m/min,and repeating cutting based on an abrasive jet equipped on the shield.The effective parameters of the abrasive jet cutting pile reinforcement are determined.Additionally,the influence of control parameters on cutting efficiency is investigated based on jet energy consumption.The results show that the critical pump pressure for steel failure is approximately 150 MPa,and the optimal target distance for volume cutting efficiency is 5~10 cm.Compared with the first five cuts,the depth cutting efficiency is reduced by approximately 42.5% when cut 20 times,and the volume cutting efficiency drops by approximately 12.14%.