摘要
通过分析南宁盆地第三系泥岩工程地质及水文地质条件,并结合南宁轨道交通工程建设特点,探讨了1号线穿越膨胀岩区的岩土工程勘察方法、试验项目及相关注意事项。提出了南宁轨道交通穿越膨胀岩区详细勘察中对钻孔间距及封孔要求、现场描述等内容;其中对室内试验建议补充岩石矿物的鉴定、吸水率和饱和吸水率试验、耐崩解试验、膨胀性试验;原位试验项目建议增加地应力试验、现场基床系数K_(30)试验、现场浸水载荷试验、水平膨胀力试验项目。并针对一些特殊勘察项目,如现场测定基床系数K_(30)、热物理指标及水平膨胀力等提出一些建议。
Analyzing the engineering geology and hydrogeological conditions of tertiary mudstone in Nanning,and combining with the characteristics of the Nanning subway,geotechnical engineering investigation methods and test projects and the relevant matters on swelling rock area of Nanning rail transit line 1 were discussed Content of detailed geotechnical investigation about space between boreholes and site description on the swelling rock area across in Nanning rail transit line 1 have been presented;it suggested that authentication on rock mineral,water absorption and saturate water absorption test,slake-durability test,swell ability test could be added into laboratory soil test;ground stress test,K30 coefficient of subgrade reaction in field testation,immersion static load field test and horizontal swelling force test is suggested into in-situ test.Some advises aiming at certain geotechnical investigation such as K30 coefficient of subgrade reaction in field test,thermal physics indexes and horizontal swelling force were presented.
出处
《岩土工程技术》
2015年第1期1-4,13,共5页
Geotechnical Engineering Technique
基金
国家自然科学基金资助项目(51168004)
南宁市科技基金资助项目(201107020C)
关键词
地铁勘察
膨胀岩
基床系数
水平膨胀力
subway exploration
swelling rock
coefficient of sub grade reaction
horizontal swelling force
