高海拔高温差深切峡谷桥址区日常大风成因

李永乐; 张明金; 徐昕宇; 陶齐宇; 朱乐东; 宋丽莉

doi:10.3969/j.issn.0258-2724.2014.06.001

高海拔高温差深切峡谷桥址区日常大风成因

doi: 10.3969/j.issn.0258-2724.2014.06.001

基金项目:

国家自然科学基金资助项目(U1334201)

交通运输部建设科技计划项目(2014318800240)

计量
- 文章访问数: 1018
- HTML全文浏览量: 101
- PDF下载量: 590
- 被引次数: 0
出版历程
- 收稿日期: 2013-12-12
- 刊出日期: 2014-12-25

Causes of Daily Strong Wind on Bridge Site in Deep Gorge with High Altitude and High Temperature Difference

摘要

摘要: 为探讨高海拔高温差深切峡谷桥址区日常大风的成因,采用CAW600-RT型四要素自动气象站、手持风速仪及便携式温度计,对大渡河大桥桥址区风特性进行实测,分析了桥位处平均风速与温度、日照及地形地貌等的相关性.结果表明:大渡河大桥位于高海拔高温差深切峡谷内,桥址区几乎每天下午起风,平均风速常达10 m/s以上;根据成因,桥位处的大风可分为2类,一类受大尺度大气环流影响,另一类受小尺度范围内热力驱动而产生日常大风,并受局部地形及随时间变化的日照的影响;桥位处日常大风出现的频率较高,虽不控制桥梁的设计基准风速,但影响桥梁的耐久性和行车舒适性.
- 深切峡谷 /
- 桥址区 /
- 日常大风 /
- 现场实测 /
- 成因分析
Abstract: In order to investigate the causes of daily strong wind on a bridge site in a deep gorge with a high altitude and a high temperature difference, the field measurement of wind characteristics was carried out on the Dadu River bridge site with the CAW600-RT automatic-weather-station (AWS), hand anemometer and portable thermometer. The property of wind environment on the bridge site was explored through analyzing its influence factors, including mean wind speed, temperature, sunlight, topography and so on. The research results show that the Dadu River bridge is located in a deep gorge with a high altitude and a high temperature difference, where strong wind occurs nearly every afternoon and its mean wind speed is often more than 10 m/s. The causes of strong wind can be classified into two types. The first type of wind is induced by large-scale general atmospheric circulation, while the second type of wind, i.e. daily strong wind, is driven by local thermal disequilibrium, and the daily strong wind is also influenced by local terrain and time-varying sunshine. Though frequent daily strong wind has not effect on the design wind speed of the bridge, it can affect bridge durability and driving comfort to some extent.
- deep gorge /
- bridge site /
- daily strong wind /
- field measurement /
- cause analysis

HTML全文

参考文献(15)

傅抱璞. 山谷风[J]. 气象科学,1980,1(2): 1-14. FU Baopu. Mountain and valley breezes[J]. Scientia Meteorological Sinica, 1980, 1(2): 1-14.

余锦华,傅抱璞. 山谷地形对盛行气流影响的数值模拟[J]. 气象学报,1995,53(1): 50-61. YU Jinhua, FU Baopu. Numerical simulation of the airflow over and in valley terrain[J]. Acta Meteoro-logical Sinica, 1995, 53(1): 50-61.

傅抱璞. 山地气候文集[M]. 北京:气象出版社,1984: 15-22.

徐大海. 大气边界层内风的若干特性及其应用[J]. 空气动力学学报,1984,2(3): 75-87. XU Dahai. Wind characteristics in the planetary boundary layer and applications[J]. Academy of Meteo-rological Science, 1984, 2(3): 75-87.

马玉堂,徐兆生. 青藏高原大气贴地层的基本物理特点[J]. 气象学报,1987,45(2): 210-217. MA Yutang, XU Zhaosheng. The basic fhysical characteristics of the atmosphere near the ground over the Qinghai-Xizang Plateau[J]. Acta Meteorological Sinica, 1987, 45(2): 210-217.

陈凯,余永生,贾丛贤. 傍山地区的强风场特性实测研究[J]. 流体力学实验与测量,2003,17(3): 18-22. CHEN Kai, YU Yongsheng, JIA Congxian. Full scale measurement of a strong wind near mountains[J]. Experiments and Measurements in Fluid Mechanics, 2003, 17(3): 18-22.

张人文,范绍佳,李颖敏. 2008年秋季从化山谷风观测研究[J]. 热带气象学报,2012,28(1): 134-139. ZHANG Renwen, FAN Shaojia, LI Yingmin. Obser-vational study of mountain-valley breeze over Conghua in 2008 fall[J]. Journal of Tropical Meteorology, 2012, 28(1): 134-139.

宋丽莉,吴战平,秦鹏,等. 复杂山地近地层强风特性分析[J]. 气象学报,2009,67(3): 452-460. SONG Lili, WU Zhanping, QIN Peng, et al. An analysis of the characteristics of strong winds in the surface layer over a complex terrain[J]. Acta Meteorologica Sinica, 2009, 67(3): 452-460.

朱乐东,任鹏杰,陈伟,等. 坝陵河大桥桥位深切峡谷风剖面实测研究[J]. 实验流体力学,2011,25(4): 15-21. ZHU Ledong, REN Pengjie, CHEN Wei, et al. Investigation on wind profiles in the deep gorge at the Balinghe bridge site via field measurement[J]. Journal of Experiments in Fluid Mechanics, 2011, 25(4): 15-21.

王凯,廖海黎,李明水,等. 山区峡谷桥梁设计基准风速的确定方法[J]. 西南交通大学学报,2013,48(1): 29-35. WANG Kai, LIAO Haili, LI Mingshui, et al. Determination method for basic design wind speed of mountainous-valley bridge[J]. Journal of Southwest Jiaotong University, 2013, 48(1): 29-35.

李永乐,蔡宪棠,唐康,等. 深切峡谷桥址区风场空间分布特性的数值模拟研究[J]. 土木工程学报,2011,44(2): 116-122. LI Yongle, CAI Xiantang, TANG Kang, et al. Study of spatial distribution feature of wind fields over bridge site with a deep-cutting gorge using numerical simulation[J]. China Civil Engineering Journal, 2011, 44(2): 116-122.

李永乐,唐康,蔡宪棠,等. 深切峡谷区大跨度桥梁的复合风速标准[J]. 西南交通大学学报,2010,45(2): 167-173. LI Yongle, TANG Kang, CAI Xiantang, et al. Integrated wind speed standard for long-span bridges over deep-cutting gorge[J]. Journal of Southwest Jiaotong University, 2010, 45(2): 167-173.

王文勇,陈楠. 山区风场的WRF/CALMET模式模拟[J]. 西南交通大学学报,2010,45(6): 990-996. WANG Wenyong, CHEN Nan. WRF/CALMET-based wind field simulation of mountain regions[J]. Journal of Southwest Jiaotong University, 2010, 45(6): 990-996.

谭波,赵志军. 林芝机场地面大风特征分析及其对飞行的影响[J]. 资源开发与市场,2010,26(12): 1071-1073. TAN Bo, ZHAO Zhijun. Effects of wind on flight in Linzhi airport[J]. Resource Development & Market, 2010, 26(12): 1071-1073.

廖晓春. 九黄机场侧风分布特征及其机理研究[D]. 广汉:中国民用航空飞行学院空中交通管理学院,2012.

施引文献

附加材料(0)

访问统计

点击查看大图

计量

文章访问数: 1018
HTML全文浏览量: 101
PDF下载量: 590
被引次数: 0

高海拔高温差深切峡谷桥址区日常大风成因

doi: 10.3969/j.issn.0258-2724.2014.06.001

计量

出版历程

Causes of Daily Strong Wind on Bridge Site in Deep Gorge with High Altitude and High Temperature Difference

计量

出版历程

目录