|本期目录/Table of Contents|

[1]谢昱姝,吴宗之,吕良海,等.城市管道天然气在土壤中泄漏扩散实验研究[J].中国安全生产科学技术,2012,8(4):13.
　XIE Yu shu,WU Zong zhi,L Liang hai,et al.Experimental research on diffusion behavior of leaked gas from underground gas pipeline[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2012,8(4):13.
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城市管道天然气在土壤中泄漏扩散实验研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
8
期数:
2012年4期
页码:
13
栏目:
学术论著
出版日期:
2012-04-30

文章信息/Info

Title:
Experimental research on diffusion behavior of leaked gas from underground gas pipeline
作者:
谢昱姝1; 2;  吴宗之3;  吕良海2;  姚伟2; 白光2
（1.北京科技大学 土木与环境工程学院，北京 100083) (2. 北京市劳动保护科学研究所 安全生产技术研究中心，北京 100054) (3. 中国安全生产科学研究院，北京 100029）
Author(s):
XIE Yushu1; 2;  WU Zongzhi3;  L Lianghai2;  YAO Wei2;  BAI Guang2
（1. School of Civil & Environment Engineering University of Science and Technology Beijing, Beijing 100083, China) (2. Beijing Municipal Institute of Labour Protection, Beijing 100054, China) (3. China Academy of Safety Science &Technology, Beijing 100029, China）
关键词:
埋地天然气管道; 泄漏; 气体扩散; 实验; 土壤
Keywords:
underground gas pipeline;  leakage;  gas diffusion;  experiment;  soil
分类号:
X937
DOI:
-
文献标志码:
A
摘要:
天然气在土壤中扩散行为的实验研究对埋地管道泄漏点的科学定位及泄漏事故的预防具有重要意义。采用全尺度气体泄漏实验系统，模拟真实埋地管道泄漏场景，对泄漏后的天然气在土壤中的扩散对流过程进行实验研究。基于自行研制的气体检测与数据采集系统和GasClam地下气体在线监测仪，分析天然气在土壤中的对流扩散规律。结果表明：埋地管道泄漏后天然气在土壤中的对流扩散过程可以分为4个阶段：孕育阶段、陡然增长阶段、缓慢增长阶段和稳定阶段，其浓度随泄漏时间的变化过程符合S型曲线特征。天然气扩散至检测点所需时间与距泄漏口距离呈现近似的幂指数关系。当检测点位于泄漏口附近区域时，泄漏压力起主导作用。当检测点位于远离泄漏口区域时，泄漏量起主导作用。
Abstract:
For predicting the leak location in underground gas pipeline and preventing leakage accident, it is extremely important to study the diffusion behavior of gases in the soil by experimental method. With fullscale gas leakage experiments to simulate real underground pipelines, the tendency that gas spreads due to convection and diffusion in soil particles was investigated. Based on selfdeveloped gas detection and data acquisition systems and GasClam insitu borehole gas monitor, the convectiondiffusion law of leaked gas in the soil was analysed. The experimental results showed that the gas leakage in the soil can be divided into four stages, which are the embryonic stage, the highspeed growth stage, the lowspeed growth stage, and stable phase. Variation of concentration of methane in soil with leak time was basically in accord with an“S”curve. The relation between time for gas concentration to reach detectable level at measuring point and distance from the leak site can be expressed with the power function equation. When the measuring point is located in the vicinity of the leak site, the pressure of underground gas pipeline plays a dominant role to diffusion of leaked gas. When the measuring point is located away from the leak site, so does the leakage quantity.

参考文献/References:

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备注/Memo

备注/Memo:
北京市科学技术研究院科技萌芽计划
更新日期/Last Update: 2012-05-07