Ventilation properties of blocky stones embankments
文献类型：期刊论文
| 作者 | He Ping; Zhang Zhao; Cheng Guodong; Bing Hui |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2007-03-01 |
| 卷号 | 47期号:3页码:271-275 |
| 关键词 | blocky stones ventilation resistance coefficient Qinghai-Tibet Railway |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2006.07.002 |
| 通讯作者 | He Ping(heping@ns.lzb.ac.cn) |
| 英文摘要 | Blocky stones are used at slopes and in embankments as one of the measures to decrease the temperature of the embankment due to natural air convection in the construction of the Qinghai-Tibet Railway. The temperature field of a blocky stones embankment is affected directly by the size, porosity and ventilation properties of the blocky stones. Experimental results show that porosity increases with increasing block size ranges from about 42.3% for 0.04 in sized stones to 47% for 0.25 in sized blocks, moreover, the minimum porosity is that of mixed blocky stones. Experiments in a wind tunnel reveal that the wind pressure gradient in blocky stones has a nonlinear behaviour with the wind velocity, directly proportional to the square of the wind velocity. Our results also show that the resistance coefficient decreases with increasing stone size, and for mixed blocky stones the coefficient is the medium. Considering the prevailing wind velocities (>= 3 in s(-1)) on the Qinghai-Tibet plateau the airflow velocity through the blocky stones embankment of Qinghai-Tibet Railway is discussed in the paper. Our experiments and calculated results confirm that blocky stones layers have good ventilation ability. Thus it can be concluded that under the prevailing wind velocities of >= 3 in s(-1) the forced air convection inside the blocky stones layer has a strong influence on the temperature field within and below the embankment and should be taken into account when calculating the temperature field. (c) 2006 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | ICE JAMS ; FLOW |
| WOS研究方向 | Engineering ; Geology |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000244721500006 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555950 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | He Ping |
| 作者单位 | 1.Beijing Jiaotong Univ, Sch Civil Engn & Architecture, Beijing 100044, Peoples R China 2.CAS, State Key Lab Frozen Soil Engn, CAREERI, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | He Ping,Zhang Zhao,Cheng Guodong,et al. Ventilation properties of blocky stones embankments[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2007,47(3):271-275. |
| APA | He Ping,Zhang Zhao,Cheng Guodong,&Bing Hui.(2007).Ventilation properties of blocky stones embankments.COLD REGIONS SCIENCE AND TECHNOLOGY,47(3),271-275. |
| MLA | He Ping,et al."Ventilation properties of blocky stones embankments".COLD REGIONS SCIENCE AND TECHNOLOGY 47.3(2007):271-275. |
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来源：寒区旱区环境与工程研究所
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