隧道洞渣加工机制砂在预制T梁中的应用研究  

Application of Manufactured Sand from Tunneling Mucks in Concrete Precast T-beam

作　　者：张立人 王岩 张仲权 张凌强 李北星[2] ZHANG Liren;WANG Yan;ZHANG Zhongquan;ZHANG Lingqiang;LI Beixing(The Fourth Engineering Co., Ltd., CCCC Second Highway Engineering Co., Ltd., Luoyang 471013, China;State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology, Wuhan 430070, China)

机构地区：[1]中交二公局第四工程有限公司,洛阳471000 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《交通科技》2021年第4期12-16,共5页Transportation Science & Technology

基　　金：江西省交通运输厅科技计划项目(2020H0002);湖北省交通运输厅科技项目(2013-700-2-19)资助。

摘　　要：为探讨隧道开挖的花岗岩洞渣加工机制砂在混凝土预制T梁中的应用可行性,依托三峡翻坝江北高速公路项目,研究花岗岩洞渣机制砂配制C50混凝土的力学性能与耐久性能,通过静载试验验证该机制砂混凝土预制T梁的承载能力。结果表明,利用隧道花岗岩洞渣生产的机制砂可以制备出具有力学性能优良且具有高抗渗和抗冻性能的C50混凝土,且该机制砂混凝土预制T梁的刚度、强度及抗裂性满足设计要求。In order to explore the technical feasibility of the application of manufactured sand used in precast concrete T-beam,the mechanical properties and durability of C50 grade concrete prepared by the granite manufactured sand were investigated based on the Three Gorges Fanba Jiangbei highway project,and the bearing capacity of the manufactured sand concrete precast T-beam was verified through the static load test.The results show that the manufactured sand made from tunneling granite mucks could be used to prepare C50 concrete for precast T-beam with excellent mechanical properties and high impermeability and frost resistance,and the rigidity,strength and crack resistance of the precast T-beam meet the design requirements.

关 键 词：隧道花岗岩洞渣 机制砂 混凝土 预制T梁 力学性能 应用 

分 类 号：U444[建筑科学—桥梁与隧道工程]