风化裂隙水对高填方稳定性的影响评价  

The influence of weathering fissure water on the stability of high fill embankment

作　　者：张国强[1] 冯文凯[1] 谢春庆[2] 杨曦[1] 吴屹[1] 

机构地区：[1]成都理工大学地质灾害防治与环境保护国家重点实验室,成都610059 [2]成都军区空军勘察设计院,成都610041

出　　处：《工程勘察》2015年第4期1-6,共6页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金(41172278);四川省教育厅重点项目(12ZA010)联合资助

摘　　要：本文主要研究场区风化裂隙水对高填方稳定性的影响,通过几个红层地区的机场高填方实践研究,总结得出泥岩顶面溢出的风化裂隙水是西南红层地区高填方稳定性分析与评价的重要组成部分。研究思路是风化裂隙水渗入填筑体中,湿化、软化砂岩填料,通过分析填料的性质变化来研究填方边坡的稳定性。本次主要利用WDX-06剖面进行计算分析,根据现场调查研究得出:机场高填方地基工程地质条件差,多以崩洪积碎石土为主,在其下方往往分布有厚层状泥岩,地下水沿泥岩顶面溢出,渗入到填筑体内部,对填料进行湿化、软化,影响填方体的稳定性。The influence of weathering fissure water on the stability of high fill is mainly studied. Through research of high fill projects of several airports in red layer regions,it can be concluded that the weathering fissure water overflowing from the top of the mudstone is one of the most important factors to assess the stability of high fills in the southwest red bed area. The research approach is that when weathering fissure water seeps into high fill body,it will wet and soften the sandstone filling material,and the stability of high fill slope can be assessed by analysis the property change of filling material. The calculation and analysis is performed on the section WDX-06. According to field investigation,it is found that the geological condition is poor in the high fill subgrade of the airports. It is mainly consist of alluvial gravels and cobbles, there is great possibility of the distribution of thick bedded mudstone underneath.Groundwater flows over the top of the mudstone,and then seeps into the high fill body which would humidify and soften the soil,lower the stability of high fills.

关 键 词：风化裂隙水 砂岩性质弱化 填料 稳定性分析 

分 类 号：TU43[建筑科学—岩土工程]