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- Title
广花盆地东北部岩溶地质特征及对城际铁路隧道 影响分析.
- Authors
柳 柳; 王 俊
- Abstract
Guanghua basin is a typical covered karst area in China, and it is easy to occur karst ground collapses during the construction of urban engineering. Based on Pearl River Delta Intercity Railway (Xintang-Baiyun Airport Guangzhou North Railway Station Project), by studying regional geological data of northeast Guanghua basin and combining drilling and borehole camera, the data of overburden and bedrock types was analyzed, development position and the size of karst cave were discussed. The distribution characteristics of karst in different soluble rocks, fold, fault fracture and lithologic contact zone were carried out and the karst risk grade of the whole line was evaluated. The results show that, controlled by lithology and Guanghua syncline, the distribution of karst is parallel to the strike of structural line on the plane, and the vertical development degree decreases with the increase of depth. Controlled by sedimentation of Liuxihe river, the overburden thickness of the south riverside terrace is greater than that of the north tributary. Due to the fact that the line passes through the strike line of the structure at a large angle, it is difficult to avoid strong karst development area in the plane. Combined with the characteristics of karst and the overburden, it is recommended that the shield method is used in the section from T3 station to T2 station, and the open-cut method is used in the section from T2 station to Guangzhou north station. The reasonable karst reinforcement measures should be taken to effectively reduce the risk of karst collapse and ensure the safety of the project.
- Subjects
GUANGZHOU (China); RAILROAD design &; construction; KARST; BEDROCK; RAILROAD stations; PETROLOGY; BOREHOLES; SPELEOTHEMS
- Publication
Railway Investigation & Surveying, 2022, Vol 48, Issue 4, p72
- ISSN
1672-7479
- Publication type
Article
- DOI
10.19630/j.cnki.tdkc.202106040001