The specific distance
between the high-pressure water jet and mud
cake lacks scientific basis presently. Therefore, the mud-cake pressing equipment and high-pressure
water-jet device are designed and developed. The high-pressure waterjet cutting mud cake tests are conducted with the
strongly-weathered argillaceous siltstone as test
material. This experiment focuses on the influence of jet pressure, flow rate,
and transmission medium on the cutting width and depth of mud cake. Main
conclusions are as follows: (1) With increasing erosion distance, the mud cake
cutting width increases first and then gradually decreases to 0, whereas the
cutting depth gradually decreases. (2) Under the same jet pressure, the cutting
width of the mud cake by the high-pressure water jet
increases when the flow rate increases from 49.1 to 110.0 L/min. Nevertheless, cutting width decreases when the flow
rate increases from 110.0 to 202.8 L/min. The cutting depth increases with the
increasing flow rate. (3) Under the same jet flow rate, the greater the water
pressure, the greater the cutting width and depth. (4) When performing mud cake
cutting in water, the effect of high-pressure water jet
on mud cake is mainly scouring, exhibiting a low cutting efficiency.
LIU Pengfei, WEN Bowei, YANG Zhao, CHEN Peishuai, JI Fuquan, SONG Xiangshuai, SONG Tongxing
. Experimental Study on
Shield Tunneling Mud Cake Cutting Based on
High Water Pressure Jet[J]. Tunnel Construction, 2024
, 44(S1)
: 230
-236
.
DOI: 10.3973/j.issn.2096-4498.2024.S1.025
