“灰包石”对隧道结构的危害机理及防治措施研究  

Research on Mechanism of the Damage to Tunnel Structure and Control Measures in Gypseous Rocks

作　　者：岳全贵 李元松[2] 陈银生 李北星[3] 

机构地区：[1]武汉中交岩土工程有限责任公司,武汉市430052 [2]武汉工程大学资源与土木工程学院,武汉市430073 [3]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉市430073

出　　处：《公路》2015年第8期281-286,共6页Highway

基　　金：交通运输部科技攻关项目;项目编号2009353540

摘　　要：在现场调查、资料分析及室内试验的基础之上,总结归纳"灰包石"的岩矿特征、化学成分、赋存地质环境条件以及膨胀与溶蚀特性。根据含石膏质岩既有隧道结构的病害现象,分析其危害原因、形成机理,并针对"灰包石"的膨胀特性与侵蚀特性,提出抑制膨胀特性的设计与施工措施,设计抗硫酸盐腐蚀的高性能混凝土配比。采用高抗硫酸盐硅酸盐水泥内掺30%粉煤灰、水胶比0.37配制的混凝土试验结果表明,其强度与耐久性均达到要求。Based on site survey, data analysis and laboratory tests, in the paper the mineral characteristics, chemical composition, geological and environmental conditions of occurrence, as well as the properties of expansion and dissolution of the gypsum rocks are summarized. According tO the present diseases phenomenon of tunnel structure containing gypseous rocks, the reasons and formation mechanism are analyzed, and regarding to the expansion and erosion characteristics of gypseous rocks, design and construction measures to restraint the expansion are proposed, and the high performance concrete proportion of resisting sulfate corrosion is worked Out. Test results show that the test when the strength and durability of high sulfate resistant Portland cement mixing with 30% fly ash and with water-Cement ratio of 0. 37 can meet the pertinent requirement.

关 键 词：含石膏质岩 隧道结构 危害机理 防治措施 

分 类 号：U457.2[建筑科学—桥梁与隧道工程]