摘要
选取西安某黄土层基坑为试验场地,针对注浆体材料类别、注浆压力大小、锚索孔径大小及锚固段长度变化的四项指标,通过现场抗拔承载力试验,分析和评价了它们对锚索极限抗拔承载力的影响效果。试验结果表明适当增大锚索孔径、采用二次劈裂注浆并选用水泥砂浆注浆材料,均有助于提高锚索极限抗拔承载力;当锚固段长度达到一定长度时,继续增加锚固长度对提高锚索极限抗拔承载力数值的效果不明显。
Selected Xi＇an loess foundation as a test site, the grouting material category, the grouting pressure size, the pore size and the anchoring cable length are Important factors for improving the cable＇s maximum capacity in loess layer. Through the scene test, they were analyzed in improving the cable＇s maximum capacity in loess layer. The results of experiment show that increasing the cable diameter appropriately, using secondary splitting groutings and choosing the cement mortar materials can be helpful for improving the cable＇s maximum capacity. And the effect of increasing the cable＇s anchor length will be not obvious to improve the cable＇s maximum capacity when the cable＇s anchorage length reaches a certain value.
出处
《中国地质灾害与防治学报》
CSCD
2014年第1期115-118,共4页
The Chinese Journal of Geological Hazard and Control
基金
中煤科工集团西安研究院技术创新项目(2011XAYCX026)
