Fu Jie, Xia Yimin, Lan Hao, Wu Dun, Lin Laikuang
College of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, Hunan, People's Republic of China.
State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, 410083, Hunan, People's Republic of China.
Sci Rep. 2021 Oct 7;11(1):19983. doi: 10.1038/s41598-021-99439-x.
The mud cake is easily formed during the tunnel boring machine (TBM) excavation in clay soils or rocks containing clay minerals. Mud cake will lead to soil disturbance of tunnel face, clogging cutterhead and even affect the construction efficiency and personnel safety. In this study, a discrimination method of mud cake formation based on cutterhead temperature was proposed. An online monitoring system was designed and installed on the slurry balance TBM. The results show that: (a) the cutterhead temperature data can be reliably detected and transmitted by the system; (b) in a tunneling cycle, the temperature at some positions of the cutterhead will increase first and then decrease; (c) during the field test, the temperature variation is around 2.5 °C under the normal condition, but the temperature variation will increase more than 50 °C due to the mud cake or geological change; (d) compared with the cooling rate, mud cake formation can be accurately discriminated.
在黏土或含有黏土矿物的岩石中进行隧道掘进机(TBM)开挖时,很容易形成泥饼。泥饼会导致隧道掌子面的土体扰动、刀盘堵塞,甚至影响施工效率和人员安全。在本研究中,提出了一种基于刀盘温度的泥饼形成判别方法。设计并在泥水加压平衡式TBM上安装了在线监测系统。结果表明:(a)该系统能够可靠地检测和传输刀盘温度数据;(b)在一个掘进循环中,刀盘某些位置的温度会先升高后降低;(c)现场试验期间,正常情况下温度变化约为2.5℃,但由于泥饼或地质变化,温度变化会增加超过50℃;(d)与冷却速率相比,可以准确判别泥饼的形成。