基于螺旋平行线与时域反射技术的岩土变形分布式探测研究

doi:10.13722/j.cnki.jrme.2015.1309

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摘要针对目前几种山体滑坡、泥石流等岩土变形造成的地质灾害监测方法的不足，提出一种新型岩土变形测量方法，该方法是将螺旋平行传输线与时域反射技术相结合形成的一种变形分布测量技术。设计变形分布式测量标定系统，运用系统中的拉伸装置分别对162 cm螺旋线进行整体拉伸与对500 cm螺旋线进行定位拉伸，同时运用系统中的时域反射装置对被拉伸的螺旋线进行测量，并运用偏最小二乘法分别对2组测量数据进行建模。将162 cm螺旋线整体逐厘米拉伸至195 cm，每拉伸1 cm测量一次时域反射数据，所建模型对拉伸量的预测值最大误差为0.3%。将500 cm螺旋线逐次从起始端至末端每隔10 cm拉伸2 cm，每拉伸一次测量一次时域反射行数据，所建模型对拉伸位置距起始端的距离值最大误差为2%。实验结果说明提出的测量方法能够对螺旋平行传输线的拉伸量和拉伸位置进行准确预测，该方法解决了点式测量“测处未变，变处未测”的不足，并具有比光纤测斜方法更大的测量范围。

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	张杨锴
	贾生尧
	曹波
	李青

关键词 ：土力学, 岩土变形, 螺旋平行传输线, 偏最小二乘算法, 时域反射技术

Abstract：Aiming at some problems in the geological hazard monitoring methods for the rock and soil deformation caused by landslides，debris flow，etc，a new method for the monitoring of rock and soil deformation has been proposed. The method is a deformation distribution measurement technique which is composed of the spiral parallel transmission line and time domain reflection technology. The deformation distributed measurement and calibration system is designed. The tensile device of the system is used to stretch of the whole spiral line of 162 cm and stretch positioning of the spiral line of 500 cm，at the same time，the time domain reflection device of the system is used to test the spiral line，and using the partial least squares to model the measurement data of the two groups respectively. To gradually stretch the spiral line of 165 cm to 195 cm，centimetre by centimetre，once 1 centimetre is stretched，new reflection data of time domain is acquired.The maximum error of the tensile model is 0.3%. To gradually stretch the spiral line of 500 cm from the starting to the end，and to stretch the spiral line 2 cm every 10 cm，once 1 step is stretched，new reflection data of time domain is acquired. The maximum error of the tensile model is 2%. The experimental shows that the proposed method can accurately predict the tensile and tensile strength of the parallel transmission lines，and it solves the problem that the measured place not be changed and the changed place can not be measured. Whats more，it has a larger measurement range than the optical measurement method of slope.

Key words： soil mechanics rock and soil deformation spiral parallel transmission line partial least squares time domain reflection technology

引用本文:

张杨锴，贾生尧，曹波，李青. 基于螺旋平行线与时域反射技术的岩土变形分布式探测研究[J]. 岩石力学与工程学报, 2016, 35(S2): 4187-4195.
ZHANG Yangkai，JIA Shengyao，CAO Bo，LI Qing. Investigation of rock and soil deformation distributed detection based on spiral parallel line and time domain reflection technology. , 2016, 35(S2): 4187-4195.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2015.1309 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS2/4187

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