Research purposes: Sichuan-Chongqing is a region with a wide distribution of red beds in China, and its climate and hydrological characteristics have unique features. In view of the special engineering and technical problems in the construction of high-speed railway subgrade works in the region, combined with practical engineering problems, classified research and analysis, at the design stage, engineering and technical measures that are technically feasible, economically reasonable, mature and reliable and in line with local conditions are taken to effectively reduce the risk of high-speed railway subgrade construction in the region and effectively reduce the potential safety hazards during operation.
Research conclusions: (1) In the survey and design stage, the source of subgrade filler should be fully investigated, and a detailed comparison of economic and technical schemes should be carried out. It is suggested that the technical scheme of purchasing qualified filler with reasonable price should be used as far as possible for subgrade filling. (2) In the survey and design stage, the detailed identification of red mudstone should be strengthened, special attention should be paid to the regional micro-difference of swelling characteristics, and targeted measures to systematically reduce the risk of subgrade arch disease should be made. (3) According to the development of rock structure in this area, targeted pre-reinforcement measures are taken at the design stage. In case of adverse geological disasters at the construction stage of the project site, it is recommended to adopt the concept of "better strong rather than weak" to effectively reduce the potential safety risks during the operation period. (4) This paper can provide references for the design of high-speed railway subgrade in the region.
Key words
red layer /
high-speed railway subgrade /
filler /
subgrade upheaval
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 黄绍槟,程强,胡厚田. 四川红层分布及工程环境特征研究[J]. 公路,2005(5):81-85.
Huang Shaobin,Cheng Qiang,Hu Houtian. A Study on Distribution of Sichuan Red Beds and Engineering Environment Characteristics[J]. Highway,2005(5):81-85.
[2] 程强,寇小兵,黄绍槟,等.中国红层的分布及地质环境特征[J]. 工程地质学报,2004(1):34-40.
Cheng Qiang,Kou Xiaobing,Huang Shaobin,etc. The Distributes and Geologic Environment Characteristics of Red Beds in China[J]. Journal of Engineering Geology,2004(1):34-40.
[3] 郭永春,谢强,文江泉. 我国红层分布特征及主要工程地质问题[J]. 水文地质工程地质,2007(6):67-71.
Guo Yongchun, Xie Qiang, Wen Jiangquan.Red Beds Distribution and Engineering Geological Problem in China[J]. Hydrogeology and Engineering Geology,2007(6):67-71.
[4] 魏永幸,蒋关鲁.:无碴轨道路基关键技术探讨[J]. 铁道工程学报.2006(5):39-44.
Wei Yongxing, Jiang Guanlu. Exploration on Key Technology of Ballastless Track Subgrade[J].Journal of Railway Engineering Society,2006(5):39-44.
[5] 敬洪武. 川中红层水理特性及对无砟轨道变形影响机制分析[J]. 地质灾害与环境保护,2019(2):35-40.
Jing Hongwu. Water-physical Property of Sichuan Central Redbeds and It's Influence on the Deformation Mechanism Analysis Ballastless Track[J].Journal of Geological Hazards and Environment Preservation, 2019(2):35-40.
[6] 杨吉新,马旭超,刘前瑞. 关于成渝高铁路基上拱问题的探讨 [J]. 铁道建筑,2016(8) :112-115.
Yang Jixin,Ma Xuchao,Liu Qianrui. Exploring on Subgrade Swelling of Chengdu-Chongqing High Speed Railway[J].Railway Engineering,2016(8):112-115.
[7] 钟志彬,李安洪,邓荣贵,等. 川中红层泥岩时效膨胀变形特性试验研究[J].岩石力学与工程学报,2019(1):76-86.
Zhong Zhibin, Li Anhong,Deng Ronggui,etc. Experimental Study on the Time-dependent Swelling Characteristics of Red-bed Mudstone in Central Sichuan [J]. Chinese Journal of Rock Mechanics and Engineering,2019(1):76-86.
[8] 司文明,庞永海. 川中红层泥岩高速铁路路基上拱病害处理设计[J]. 高速铁路技术,2022(3): 96-99.
Si Wenming, Pang Yonghai. The Design of Disease Treatment for the Upheaval of Subgrade of High-speed Railway on Bed Mudstone in Central Sichuan[J].High Speed Railway Technology,2022(3):96-99.
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
PDF(928 KB)
