剥离温度影响的锚杆轴力监测成果分析

发布时间：2018-07-21 11:52

【摘要】：锚杆支护加固效果评价常依赖锚杆轴力的监测,但边坡中影响锚杆轴力的因素众多,故分析锚杆轴力的成因具有重要的意义。借助某高速公路超高岩质边坡的锚杆轴力监测,定性分析影响锚杆轴力大小的因素,然后针对各因素定量化,建立锚杆轴力多元线性回归模型,进而剥离温度影响,计算所受边坡变形影响的真实轴力,准确评价锚杆的加固效果,降低对边坡变形破坏的误判。将本方法成功应用于锚杆MGZ1042测点真实轴力的计算,通过剥离温度影响,锚杆轴力由原来的100 k N降至真实轴力40 k N,未超过锚杆轴力监测警戒值60 k N,从而正确判断了边坡变形破坏趋势。
[Abstract]:The evaluation of bolting and strengthening effect often depends on the monitoring of anchor axial force, but there are many factors influencing the anchor axial force in the slope, so it is of great significance to analyze the cause of the anchor axial force. With the aid of monitoring the axial force of anchor rod in an ultra-high rock slope of a certain expressway, the factors influencing the axial force of anchor rod are analyzed qualitatively, and then the multivariate linear regression model of axial force of anchor rod is established according to the quantitative analysis of each factor, and then the influence of temperature is removed. The real axial force affected by slope deformation is calculated, the reinforcement effect of anchor rod is evaluated accurately, and the misjudgment of slope deformation and failure is reduced. The method is successfully applied to the calculation of the real axial force of the anchor rod MGZ1042, and the effect of stripping temperature is obtained. The axial force of the anchor is reduced from 100 KN to 40 KN, which does not exceed the monitoring warning value of 60 KN, so the deformation and failure tendency of the slope is correctly judged.
【作者单位】：赣州高速公路有限责任公司;江西省交通科学研究院;中铁隧道勘测设计院有限公司;贵州省水利水电勘测设计研究院;
【基金】：江西省交通运输厅重点工程科技项目(2015C0067;2016C0004;2015C0020)
【分类号】：U417.1

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