可回收土钉墙支护结构体系施工工艺及受力研究  

Research on Construction Technology and Stress of Retaining Structure System with Recoverable Soil Nail Wall

作　　者：张钦喜[1] 张振双 翟玉新 魏锰 王钰 Zhang Qinxi;Zhang Zhenshuang;Zhai Yuxin;Wei Meng;Wang Yu(College of Architecture and Engineering,Beijing University of Technology,Beijing 100124,China;China Railway Construction Group Co.,Ltd.,Beijing 100072,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]中铁建设集团有限公司,北京100072

出　　处：《岩土工程技术》2022年第3期196-202,共7页Geotechnical Engineering Technique

摘　　要：基于绿色环保与碳中和理念,提出一种可回收的土钉墙支护结构体系,对该体系构件及施工工艺流程进行了介绍,依托实际工程,探讨了1∶0.30、1∶0.50、1∶0.70支护坡比下土钉轴力、主动土压力的变化规律,分析了不同支护坡比对土钉轴力、主动土压力的影响,与规范中的修正公式计算出的理论值进行对比。研究表明,同一深度的主动土压力和土钉轴力随坡比增加而增加,同一坡比下的主动土压力和土钉轴力随深度增加而增加;主动土压力的实测值与计算值随深度变化呈现相同趋势,计算值略大于实测值,土钉轴力的实测值与计算值随深度变化亦呈现相同趋势,但计算值远大于实测值。Based on the concept of green environmental protection and carbon neutrality,a recyclable soil nail wall supporting structure system was proposed,and the composition and construction process of the supporting structure system were introduced.The new supporting structure system was applied to practical engineering,and its mechanical performance was discussed.The variation laws of soil nailing axial force and active earth pressure under 1∶0.30,1∶0.50 and 1∶0.70 supporting slopes were discussed,and the influences of different supporting slopes on soil nailing axial force and active earth pressure were analyzed,which were compared with the theoretical values calculated by modified formula in the code.The test results show that the axial force of soil nailing and active earth pressure increase with the increase of slope in the same depth.For the earth pressure at the same slope,the axial force of soil nailing increases with the increase of depth.According to the change of depth,comparing the actual value with the theoretical value,it can be concluded that the theoretical value and the actual value of active earth pressure have the same trend with the change of depth,and the theoretical value is slightly larger than the actual value.The theoretical value and actual value of axial tensile force of soil nailing show the same trend with the increase of depth.There is a big difference between the calculated axial force and the actual monitored axial force,and the theoretical calculation is relatively conservative.

关 键 词：可回收土钉墙 施工工艺 主动土压力 土钉轴力 

分 类 号：TU413[建筑科学—岩土工程]