第四系全新统软土地层中浅层气空间分布及其控灾特征  

The spatial distribution characteristics of shallow gas in soft soil layer of Quaternary Holocene and its effect on geological hazard

作　　者：周殷康 阎长虹[1] 李学乾[2] 袁裕财 李占先[2] 

机构地区：[1]南京大学地球科学与工程学院,南京210046 [2]中铁十四局集团有限公司,济南250014

出　　处：《工程勘察》2016年第5期17-20,25,共5页Geotechnical Investigation & Surveying

基　　金：教育部博士点基金资助项目(编号20130091110020)

摘　　要：我国东南沿海地区广泛发育有新近沉积的软土,尤其在长江三角洲地区,由于其独特的沉积地质环境和沉积历史,使得软土不仅具有高含水量、高压缩性等特点,同时其中还蕴含有一类特殊气体——浅层气。在工程建设中,浅层气是一种潜在的地质灾害,具有较大的危害性,有时会造成重大工程事故,因此,有必要对其浅层气的空间分布特征进行研究。论文通过对浅层气形成机制以及灾害特征的分析,圈定了对工程有重要影响的灾害体分布范围,有效保证了工程安全。这一研究对于工程防灾减灾具有重要的实际应用价值。In the southeast coastal area of China,the newly deposited soft soil is widely spread,especially in the Yangtze River delta. It is not only that the moisture content and compressibility of the soft soil are high,but a unique gas named shallow gas is produced in the distinct geological conditions and sedimentary history. The shallow gas is likely to cause geological disaster which is harmful to engineering practice.Therefore it is necessary to study the spatial distribution characteristics of the shallow gas. Based on the analysis of the formation mechanism and disaster characteristics,the distribution of hazardous shallow gas which would affect construction is scoped to ensure safety. This research could be applied for disaster prevention and mitigation.

关 键 词：浅层气 软土 空间分布 机制分析 灾害特征 

分 类 号：TU449[建筑科学—岩土工程]