| 全断面隧道掘进机护盾受力监测及卡机预警 |
| |
| 引用本文： | 刘泉声,彭星新,黄兴,雷广峰,魏莱,刘鹤.全断面隧道掘进机护盾受力监测及卡机预警[J].岩土力学,2018,39(9):3406-3414. |
| |
| 作者姓名： | 刘泉声 彭星新 黄兴 雷广峰 魏莱 刘鹤 |
| |
| 作者单位： | 1. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，湖北 武汉 430071；2. 武汉大学 土木建筑工程学院，湖北 武汉 430072；3. 武汉大学 岩土与结构工程安全湖北省重点实验室，湖北 武汉 430072；4. 中国科学院大学 北京 100049； 5. 中铁十一局集团第四工程有限公司 湖北 武汉 430073 |
| |
| 基金项目： | 国家重点基础研究发展计划项目(973计划)（No. 2015CB058102，No. 2014CB046904）；国家自然科学基金面上项目（No. 51474205）。 |
| |
| 摘 要： | 全断面隧道掘进机(简称TBM)在穿越深部软弱地层时围岩收敛变形较大，围岩容易挤压护盾，导致TBM卡机，影响TBM正常掘进。通过分析TBM卡机灾害孕育过程，得到了预测TBM卡机的重要条件：一是围岩变形量大于预留的空间，二是额定推力不能克服摩擦阻力。为了监测实际工程TBM卡机状态，提出了一种监测护盾变形的方案以及护盾受力的计算方法，可通过监测得到的变形估算护盾的受力，进而计算出护盾受到的摩擦阻力，得到TBM卡机的状态。根据TBM受到的摩擦阻力、TBM正常掘进时所需推力和TBM额定推力之间的关系，将TBM卡机状态分为4个等级，即无卡机、轻微卡机、卡机和严重卡机，并提出了对应的处理措施。结合TBM卡机条件以及护盾受力监测方案，提出了TBM卡机灾害预警流程。在兰州水源地输水隧洞工程中应用了该监测方案和卡机灾害预警流程，应用结果表明，预测的卡机状态与TBM实际状态基本一致，说明该方法具有一定的可靠性，对指导TBM隧道施工具有重要意义。
|
| 关 键 词： | 全断面岩石隧道掘进机 护盾受力 卡机预警 |
Monitoring shield stress of tunnel boring machine and jamming warning |
| |
| LIU Quan-sheng,PENG Xing-xin,HUANG Xing,LEI Guang-feng,WEI Lai,LIU He.Monitoring shield stress of tunnel boring machine and jamming warning[J].Rock and Soil Mechanics,2018,39(9):3406-3414. |
| |
| Authors: | LIU Quan-sheng PENG Xing-xin HUANG Xing LEI Guang-feng WEI Lai LIU He |
| |
| Abstract: | The deformation of surrounding rock tunnelling by tunnel boring machine (TBM) is normally large when the tunnel passes through the deep and weak layer. The TBM shield is squeezed easily by the surrounding rock, which further results in the TBM jamming and influences the operation of TBM. By analyzing the mechanism of TBM shield jamming problems, two important conditions for forecasting TBM jamming are concluded. One is that the deformation of the surrounding rock is greater than the reserved space, and the other is that the rated thrust force cannot overcome the frictional resistance. For monitoring the jamming state of the actual TBM engineering, this study is to propose a scheme of monitoring the deformation of the TBM shield and a method of calculating the pressure of the shield. The extrusion force between the surrounding rock and the shield can be estimated, then the frictional resistance of TBM is calculated, and the state of the TBM jamming can be achieved. According to the relation between TBM frictional resistance force for excavating and the TBM rated thrust, the state of the TBM jamming can be divided into four grades: no jamming, minor jamming, jamming and severe jamming, and the corresponding treatment measures are suggested. At last, the flowchart of warning of the TBM jamming is developed by combining the monitoring scheme with the conditions of TBM jamming. The flowchart and the scheme of monitoring the deformation are successfully applied to Lanzhou water conveyance tunnel engineering, and it is found that the predicted jamming state is nearly the same as the actual state, and thus this method has certain reliability and attaches great importance to TBM tunnelling construction. |
| |
| Keywords: | tunnel boring machine (TBM) shield stress warning mechanism of the TBM jamming |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
