高速公路路-桥过渡段台背回填区受力与变形特性  

Mechanical and Deformation Characteristics of the Backfill Soil at Abutment of Road-bridge Transition Section of Expressway

作　　者：王永涛 姜鲁宁 孙勇 崔伟[2,3] 潘深泉 曹智杰 WANG Yong-tao;JIANG Lu-ning;SUN Yong;CUI Wei;PAN Shen-quan;CAO Zhi-jie(Shandong Luqiao Group Co.,Ltd.,Jinan 250014,China;Geotechnical and Structural Engineering Research Center,Shandong University,Jinan 250061,China;School of Qilu Transportation,Shandong University,Jinan 250002,China)

机构地区：[1]山东省路桥集团有限公司,济南250014 [2]山东大学岩土与结构工程研究中心,济南250061 [3]山东大学齐鲁交通学院,济南250002

出　　处：《科学技术与工程》2023年第14期6223-6229,共7页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(52078278);山东省工业和信息化厅项目(202150100995)。

摘　　要：基于室内熟石灰和活性MgO粉末作为高炉粒化矿渣(granulated blast furnace slag,GGBS)的碱性激发剂加固粉土的室内试验,研究了加固粉土时熟石灰和MgO粉末作为高炉粒化矿渣碱性激发剂的最优掺和量。基于现场试验研究了熟石灰激发矿渣加固粉土作为桥梁台背回填材料时的承载性能。结果表明,掺量为15%的MgO粉末和掺量为6%的熟石灰激发矿渣加固粉土可作为桥梁台背回填材料。考虑到经济性和现场加固效果,实际工程中可采用熟石灰掺量为6%激发矿渣加固后的粉土作为桥梁台背回填材料。研究结果可为高速公路路-桥过渡段差异沉降控制控制提供参考。Laboratory tests were carried out on the silt solidified by the granulated blast furnace slag(GGBS)alkali-activated by hydrated lime and MgO powder.The optimal mixing amount of hydrated lime and MgO powder used as the alkali activator of GGBS was determined.The bearing capacity of the silt solidified by the GGBS alkali-activated by hydrated lime was studied by using field test.The research shows that the silt solidified by the GGBS alkali-activated by 15%MgO powder and 6%hydrated lime can be used as bridge abutment backfill materials.Considering the economy and reinforcement effect,the silt solidified by the GGBS alkali-activated by 6%hydrated lime can be used as the backfill material of abutment of road-bridge transition section in practice.The present research can be used for controlling differential settlement of road-bridge transition section of expressway.

关 键 词：路-桥过渡段 台背回填 高炉粒化矿渣 固化粉土 承载性能 

分 类 号：U416.111[交通运输工程—道路与铁道工程]