非接触式围岩内部位移量测系统的试验研究

doi:10.13722/j.cnki.jrme.2016.1079

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摘要

工程围岩内部位移的监控量测一直是一项费时费力的工作，特别是在工程断面大、量测距离远以及监测点供电困难等情况下，观测围岩内部位移尤为困难。为克服上述困难并提高监测效率，提出一套全新的非接触式围岩内部位移量测方案。方案通过将测点钻孔内的轴向位移转换为一种孔口转盘的旋转量，在该含有观测窗口的转盘下方装有环向灰度渐变膜片。通过望远光学摄像分析膜片反射光的强度，根据反射光强度模式的变化计算转盘旋转量，从而实现围岩内部位移的测量。通过室内标定试验，证实膜片的反射光强度模式与转盘转动角度之间有着很好的线性关系，通过建模，可有效提高围岩内部位移的分析精度。在龙门隧道工程现场对新量测方案进行验证，通过对比试验及围岩等级调查表明，量测结果与实际相符。新的围岩内部位移量测系统可实现非接触连续监测并达到工程测量精度要求。

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	张程远1
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	刘泉声1
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	赵军5

关键词 ：隧道工程, 自动化量测, 围岩内部位移, 位移计, 监控量测

Abstract：

Monitoring on the deformation of the engineering rock mass is one time and cost consuming task，especially for the cases with large monitoring section and long monitoring distance and when the power supply is not properly available. To overcome these difficulties and improve the efficiency of monitoring，we present anon-contact measurement system. The principle of this method is converting the internal displacement of surrounding rock to the rotation angle of the disk. A diaphragm is arranged below the rotating disk with an observation window. The intensity of the light reflected from the different regions of the diaphragm is changed，and the rotary angle of the disk is calculated by the intensity of reflected light. Through the laboratory test，it shows that there is a good linear relationship between the intensity of the reflected light and the rotary angle of the disk. By modeling，the monitoring precision of the internal displacement of surrounding rock can be effectively improved. The new measurement scheme was verified in Long men tunnel. Comparison test and surrounding rock grade survey show that the results of measurement are in line with the actual situation. The new measurement system can achieve non-contact measurement and reach the accuracy of engineering measurement.

Key words： tunnelling engineering automatic measurement surrounding rock internal displacement displacement meter monitoring survey

引用本文:

张程远1，张静1，2，刘泉声1，3，4，赵军5. 非接触式围岩内部位移量测系统的试验研究[J]. 岩石力学与工程学报, 2018, 37(S1): 3481-3488.
ZHANG Chengyuan1，ZHANG Jing1，2，LIU Quansheng1，3，4，ZHAO Jun5. Experimental study on non-contact measurement system of internal displacement of surrounding rock. , 2018, 37(S1): 3481-3488.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.1079 或 https://rockmech.whrsm.ac.cn/CN/Y2018/V37/IS1/3481

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