第38卷第5期 2016年10月
土木建筑与环境工程
Journal of Civil,Architectural &.Environmental Engineering
doi:10.11835/j.issn. 1674-4764.2016. 05.014
灌浆压力测量误差的正交试验分析
李凤玲
（长沙理工大学汽车与机械学院；交通运输工程学院，长沙410076）
Vol.38 No.5 Oct.2016
日
摘要：灌浆规范中的灌浆压力是作用在灌浆岩体上的孔内灌浆压力。由于工艺的约束，现行灌浆监控过程常用孔口压力表示孔内灌浆压力，造成了灌浆压力的测量误差。针对非循环灌浆工艺，通过建立流体管道流动模型开展数值计算，采用多因素多水平正交法探究灌浆压力误差受浆液配比、浆液流速、灌浆孔深的相对影响，并采用统计法来分析不同工况下的显著影响因素。研究结果表明：灌浆压力较小时，灌浆压力误差普遍较大；若此时灌浆孔深且流速较大时，灌浆压力的测量误差则会超过灌浆压力仪表0.5%的精度要求，须进行误差补偿。其次，极差分析结果表明灌浆孔深是造成测量误差的主要固素，灌浆流速是第二个主要因素。而综合所有试验结果，浆液流速和灌浆孔深接近时，浆液配比越小，绝对偏差越大。结合上述正交试验和数值模型获取了不同工况下孔内灌浆压力值。
关键词：灌浆压力；测量误差；正交分析法；数值模型
中图分类号：TU473.2
文献标志码：A文章编号：1674-4764(2016)05-0108-07
Orthogonal experimentalanalysisofmeasuringerrorforgroutingpressure
Li Fengling
(College of Automobile and Mechanical Engineering; School of Traffic and Transportation Engineering
Changsha University of Science &. Technology,Changsha 410076,P. R. China)
Abstract:Grouting pressure is down-hole pressure on the crack of grouting hole. Due to the constraints of grouting art, the grouting pressure is presented by the pressure of up-section of pipe, which produces measurement error of grouting pressure. the fluid flow model of grouting pipe for numerical computing is constructed, and orthogonal experimental method to analysis the error of grouting pressure influenced by cement grout ratio, grout velocity and grouting depth is adopted. And the significant factor is presented based on statistical method in different grouting conditions. The results demonstrate that grouting pressure is lower, the error of grouting pressure is bigger,and the relative error would exceed the up-bound precision of pressure sensor with o. 5%, and the measuring value must be revised. Secondly, the analysis of range
收稿日期：2015-11-05
基金项目：国家自然科学基金（51408069)；长沙理工大学道路结构与材料交通行业重点实验室开放基金（kfj130204)；工
程车辆轻量化与可靠性技术湖南省重点实验室开放基金（2013k功j09）
作者简介：李风玲(1974-），女博士+副教授，主要从事测量与控制技术、复杂系统建模等研究，（E-mailDIli4789@126.com， Received : 2015-11-05
Foundation item:National Natural Science Foundation of China (No: 51408069); Open Fund of Key Laboratory of Road
Structure and Material of Ministry of Transport, Changsha University of Science &. Technology (No. kfj130204); Key Laboratory of Lightweight and Reliability Technology for Engineering Vehicle, Education Department of Hunan Province, Changsha University of Science &. Technology (No. 2013kfj09)
Authorbrisf:ei Fengling(1974-), PhD, associate professor, main research interests: measuring and control technology 芳芳数糖delof.complexsystem，（E-mail)li4789@126.com.