摘要
土钉支护中土钉拉力有多种计算方法。实践表明,土钉实际所受拉力与现有理论或规程计算结果相差较大。对CNC科研中心办公楼土钉支护进行了现场监测和分析,主要通过在土钉主筋上埋设钢筋应力计的方法,对土钉实际工作状态下的拉力进行了跟踪监测,并把实测拉力与现行常用计算方法得出的结果进行了比较和分析。研究结果表明,正常工作状态下土钉受力沿土钉长度方向呈抛物线形分布;在垂直方向,土钉拉力随深度的增加变化不大;土钉拉力明显小于现行规程计算结果。
There are ways to evaluate the stress of soil nails,but the actual stress is very different from theoretical analysis.In-situ measurements in CNC project in Beijing,mostly adopt the method which lays the reinforcing steel bar-stress measuring apparatus on primary reinforcing steel bar to gain actual pull force when the soil-nailing in working condition.Another method is to contrast the actual pull force with the value calculated by current regulations.The result of the study shows that the stress of soil nails along the length direction appears to be parabola distributing,and the actual pull force in soil nails is no less than 30kN which is far less than designed stress.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2010年第S2期545-549,共5页
Chinese Journal of Geotechnical Engineering
关键词
土钉支护
土钉拉力
现场监测
soil-nailing retaining-structure
stresses in soil nails
in-situ test and measurement
