Analysis of Friction Loss Pressure of Cement Slurry in Pipeline under Different Pump Pressures

摘要

Grouting pump is traffic, subway and tunnel bridge important basis in the field of the power source in the process of grouting, the grouting monitoring system can monitor to the surface of the pump outlet pressure, not considering the cement slurry in pipeline transmission pressure loss, there must be lead to the hole grouting pressure value is less than the orifice pump pressure value, thus unable to reach the expected effect of grouting. In view of the above situation, the simulation model of cement slurry transmission in the pipeline was created in Fluent module of ANSYS finite element software, and the influence of different pump pressures on the friction loss pressure of cement slurry transmission in the pipeline was analyzed with the control variable method when the slurry ratio and slurry velocity remained unchanged. A large number of simulation results show that: when the cement slurry is transmitted in the pipeline over a long distance, the pump pressure value input increases gradually from small to large, so does the pressure value in the hole, and the corresponding absolute deviation shows an increasing trend. In addition, the value of the input pump pressure gradually increases, and the corresponding relative deviation value is still large, indicating that the pressure loss in the hole is large, and pressure compensation must be carried out, so as to achieve the expected grouting effect.