中文摘要：

针对土钉支护中土钉实际所受拉力与目前理论和规程计算结果相差较大的问题，对北京朝外SOHO土钉支护进行了现场监测．采用在土钉主筋上埋设钢筋应力计进行土钉实际工作状态下的拉力测试和把实测拉力与现行规程计算得出的结果作对比的研究方法．研究结果表明，土钉受力沿土钉长度方向呈抛物线形分布，土钉实际所受拉力仅为理论计算值的1／2左右．

英文摘要：

The actual stress in soil nails is very different from theoretical analysis, so in-situ measurements in Chaowai SOHO project in Beijing, the method that placing the reinforcing steel bar-stress measuring appara- tus in primary reinforcing steel bar to gain actual pull force is adopted in this paper. When the soil-nailing is made. The result of the study shows that the stress in soil nails along the length direction display parabola distribution, and the actual pull force in soil nails about half of the value is gained by theoretical calculation.