隧道弃渣在公路路基施工中的应用研究  

Study on Application of Waste Residue of Tunnel in Highway Subgrade Construction

作　　者：李文霞 谢晓杰 王永贵[2] LI Wenxia;XIE Xiaojie;WANG Yonggui(School of Architecture and Engineering,Zhengzhou University of Industrial Technology,Xinzheng,Henan 451150,China;College of Civil Engineering,Henan University of Technology Jiaozuo,Henan 454000,China)

机构地区：[1]郑州工业应用技术学院建筑工程学院,河南新郑451150 [2]河南理工大学土木工程学院,河南焦作454000

出　　处：《公路工程》2019年第6期177-182,共6页Highway Engineering

基　　金：河南省重点科技计划(082102240009);河南省教育厅自然科学基金(2011A560004)

摘　　要：针对隧道弃渣中超大粒径块石作为土石混合填充料易引起路基结构稳定性问题,采用试验检测和有限元模型分析法获得了不同粒径块石间距和布设方式下土石混合料的稳定性评价模型,通过引入压实度有效值和安全评价系数来进行路基结构的稳定性评价。研究结果表明:块石间距为20 cm,小于夯锤直径时,土石混合料的压实效果较差,当间距达到35 cm以上,具备了较好的压实质量,压实效果值稳定在1左右。且加入超大粒径块石后填土混合料土压力略大于未加入块石的土石混合料,提高了路基的稳定性。超大粒径块石布置在路基边坡坡底处时安全系数最大,路基最为稳定,其次为路基坡腰处,而布置在路基边坡坡顶和边坡滑移带外小于未填充超大粒径块石的路基安全系数。The stability of roadbed structure is easy to be caused by super-sized rock in the waste slag of tunnel as a mixture of soil and rock.The stability evaluation model of soil-rock mixture with different size spacing and distribution mode was obtained by means of test and finite element model analysis.The effective value of compactness and safety evaluation coefficient were introduced to evaluate the stability of roadbed structure.The results show that the compaction effect of soil-rock mixture is poor when the spacing is 20 cm,which is smaller than the diameter of rammer.When the spacing is above 35 cm,the compacting quality is better and the actual value of compaction is about 1.And add extra-large-sized boulders.

关 键 词：隧道弃渣 超大粒径块石 压实度 

分 类 号：U41[交通运输工程—道路与铁道工程]