|
|
|
| ANALYSIS OF PRE-WIDENING EFFECT OF THERMAL INSULATION BERM ON HIGHWAY RECONSTRUCTION IN PERMAFROST REGIONS |
| YUAN Kun1，2，3，ZHANG Jinzhao1，2，ZHU Dongpeng1，2 |
(1. State Key Laboratory of Frozen Soil Engineering，Cold and Arid Regions Environmental and Engineering Research Institute，Chinese Academy of Sciences，Lanzhou，Gansu 730000，China；2. First Highway Survey and Design Institute，
China Communications Construction Group，Xi?an，Shaanxi 710075，China；3. University of Chinese
Academy of Sciences，Beijing 100049，China) |
|
|
|
|
Abstract In order to study the early stage effects of thermal insulation berm on embankment temperature field of widen embankment，the ground temperature near permafrost table and the change process of permafrost table are analyzed according to observation data of the insulation berm test road along the Qinghai—Tibet highway. A numerical simulation model is established for widen embankment and the early stage effects of insulation berm on permafrost，the thermal stability of permafrost under the shoulder after embankment widening are calculated. Results show that the degradation of permafrost under the berm in sunny slope is accelerated by berm itself，this influence in warm permafrost regions is greater than that in cold permafrost regions and the insulation berm in shady slope has less effect on the thermal stability of permafrost. The pre-melted effect is brought by berm in sunny slope，and the permafrost table under the shoulder does not have significant decrease after embankment widening，which shows as pre-widening effect and it is beneficial to stability of widen embankment. The berm in shady slope has less effect on widen embankment，regardless of whether the insulation berm，the permafrost table change process have less difference after embankment widening.
|
|
Received: 28 November 2012
|
|
|
|
| [1] 汪双杰，陈建兵，章金钊. 保温护道对冻土路基地温特征的影响[J]. 中国公路学报，2006，19(1)：12–16.(WANG Shuangjie，CHEN Jianbing，ZHANG Jinzhao. Influences of insulating berm on ground temperature characteristics of permafrost subgrade[J]. China Journal of Highway and Transport，2006，19(1)：12–16.(in Chinese))
[2] 汪双杰，陈建兵，黄晓明. 冻土路基护道地温特征研究[J]. 岩石力学与工程学报，2006，25(1)：146–151.(WANG Shuangjie，CHEN Jianbing，HUANG Xiaoming. Study on ground temperature characteristics of embankment berm on permafrost[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(1)：146–151.(in Chinese))
[3] 葛建军. 青藏铁路多年冻土区保温护道路基温度场数值模拟研究[J]. 冰川冻土，2008，30(2)：274–279.(GE Jianjun. Numerical simulation of the temperature regime within an embankment with insulated berm of the Qinghai-Tibet Railway[J]. Journal of Glaciology and Geocryology，2008，30(2)：274–279.(in Chinese))
[4] 丑亚玲，盛 煜，韦振明. 多年冻土区公路路基阴阳坡温度及变形差异分析[J]. 岩石力学与工程学报，2009，28(9)：1 896–1 903. (CHOU Yaling，SHENG Yu，WEI Zhenming. Temperature and deformation differences between southern and northern slopes of highway embankment on permafrost[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(9)：1 896–1 903.(in Chinese))
[5] 盛 煜，马 巍，温 智，等. 多年冻土区铁路路基阴阳坡面热状况差异分析[J]. 岩石力学与工程学报，2005，24(17)：3 197–3 201. (SHENG Yu，MA Wei，WEN Zhi，et al. Analysis of difference in thermal state between south faced slope and north faced slope of railway embankment in permafrost region[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 197–3 201.(in Chinese))
[6] LI D L，GUO H，WANG W. The influences of sunspot cycle and concentration of CO2 on air temperature along the Qinghai-Tibet Railway and its prediction[J]. Science in China：Series D，2003，33：123–132.(in Chinese)
[7] WU Q B，ZHANG Z Q，LIU Y Z. Long-term thermal effect of asphalt pavement on permafrost under an embankment[J]. Cold Regions and Technology，2010，60(3)：221–229.
[8] 安维东，吴紫汪，马 巍，等. 冻土的温度水分应力及其相互作用[M]. 兰州：兰州大学出版社，1990：21–25.(AN Weidong，WU Ziwang，MA Wei，et al. Interaction among temperature moisture and stress fields in frozen soil[M]. Lanzhou：Lanzhou University Press，1990：21–25.(in Chinese))
[9] 董元宏，赖远明，陈 武. 多年冻土区宽幅公路路基降温效果研究—— 一种L型热管块碎石护坡复合路基[J]. 岩土工程学报，2012，34(6)：1 043–1 049.(DONG Yuanhong，LAI Yuanming，CHEN Wu. Cooling effect of combined L-shaped thermosyphon，crushed-rock revetment and insulation for high-grade highways in permafrost regions[J]. Chinese Journal of Geotechnical Engineering，2012，34(6)：1 043–1 049.(in Chinese))
[10] 徐斅祖，王家澄，张立新. 冻土物理学[M]. 北京：科学出版社，2001：103–105.(XU Xiaozu，WANG Jiacheng，ZHANG Lixin. Physics of frozen soils[M]. Beijing：Science Press，2001：103–105.(in Chinese))
[11] 丑亚玲. 多年冻土区路基阴阳坡效应及纵向裂缝机理研究[博士学位论文][D]. 兰州：中国科学院寒区旱区环境与工程研究所，2008：59–60.(CHOU Yaling. Study on shady-sunny effect and the forming mechanism of the longitudinal embankment crack in permafrost[Ph. D. Thesis][D]. Lanzhou：Cold and Arid Regions Environmental and Engineering Research Institute，Chinese Academy of Sciences，2008：59–60.(in Chinese))
[12] 朱林楠. 高原冻土区不同下垫面的附面层研究[J]. 冰川冻土，1988，10(1)：8–14.(ZHU Linnan. Study of the adherent layer on different types of ground in permafrost regions on the Qinghai-Xizang plateau[J]. Journal of Glaciology and Geocryology，1988，10(1)：8–14.(in Chinese))
[13] 章定文，刘松玉. 软土地基高速公路扩建中新老路堤相互作用数值分析[J]. 中国公路学报，2006，19(6)：7–12.(ZHANG Dingwen，LIU Songyu. Numerical analysis of interaction between old and new embankment in widening of freeway on soft ground[J]. China Journal of Highway and Transport，2006，19(6)：7–12.(in Chinese))
[14] 翁效林，张留俊，李林涛，等. 拓宽路基差异沉降控制技术模型试验研究[J]. 岩土工程学报，2011，33(1)：159–164.(WENG Xiaolin，ZHANG Liujun，LI Lintao，et al. Model tests on control techniques for differential settlement of road widening[J]. Chinese Journal of Geotechnical Engineering，2011，33(1)：159–164.(in Chinese))
[15] 傅 珍，王选仓，李宏志，等. 高速公路拓宽路基差异沉降[J]. 交通运输工程学报，2010，10(6)：25–30.(FU Zhen，WANG Xuancang，LI Hongzhi，et al. Differentia settlement of widening subgrade for expressway[J]. Journal of Traffic and Transportation Engineering，2010，10(6)：25–30.(in Chinese))
[16] 刘永智，吴青柏，张建明，等. 青藏高原多年冻土地区公路路基变形[J]. 冰川冻土，2002，24(1)：10–15.(LIU Yongzhi，WU Qingbai，ZHANG Jianming，et al. Deformation of high roadbed in permafrost regions of the Tibetan Plateau[J]. Journal of Glaciology and Geocryology，2002，24(1)：10–15.(in Chinese))
[17] 马 巍，刘 端，吴青柏. 青藏铁路冻土路基变形监测与分析[J]. 岩土力学，2008，29(3)：571–579.(MA Wei，LIU Duan，WU Qingbai. Monitoring and analysis of embankment deformation in permafrost regions of Qinghai-Tibet Railway[J]. Rock and Soil Mechanics，2008，29(3)：571–579.(in Chinese))
[18] 齐吉琳，马 巍. 冻土的力学性质及研究现状[J]. 岩土力学，2010，31(1)：133–143.(QI Jilin，MA Wei. State-of-art of research on mechanical properties of frozen soils[J]. Rock and Soil Mechanics，2010，31(1)：133–143.(in Chinese)) |
|
|
|
2014, Vol. 33 
