岩土力学2009，Vol.30Issue(11)：3386-3392,7.
全长注浆岩石锚杆中性点影响因素分析研究
Analyzing and studying factors for determining neutral point position of fully grouted rock bolt
摘要
Abstract
The neutral point theory is the important theory in underground engineering reinforcement theory. At present, the formula to determine neutral point position has been existed some unreasonable place. The neutral point theory had been further consummated and improved on the foundation of pre-researchers. Base on the developed analytical model and the theory of frictional resistance is zero at the neutral point, the factors have been detailed analyzed for affecting the neutral point position; and the correlations have been gained which affecting neutral point position. Through analyzing, it is revealed that the hydrostatic primary stress, bolt length, bolt spacing having no influence to neutral point position, and the radius of tunnel, Young's moduli of rock and bolt, the bolt diameter having remarkable influence to it. Among them, it is linear relation among the radius of tunnel, the bolt diameter with the neutral point position, but it is exponential function relations among the Young's modulus of rock and bolt with the neutral point position. The relationship of Young's modulus of rock mass and neutral point position presents exponential decreasing; the relationship of -Young's modulus of bolt and neutral point position presents exponential increasing. Through the factors analyzed, it has obtained that the general functional between the neutral point position and the correlation parameter, for further to study the neutral point theory providing the certain reference significance.关键词
岩石力学/全长注浆锚杆/摩阻力/中性点Key words
rock mechanics/ fully grouting rock bolt/ frictional resistance/ neutral point分类
建筑与水利引用本文复制引用
朱训国,杨庆..全长注浆岩石锚杆中性点影响因素分析研究[J].岩土力学,2009,30(11):3386-3392,7.基金项目
中国博士后科学基金(No.20090451269) （No.20090451269）
国家自然科学基金(No.50679015). （No.50679015）
