Evolution regularity of the plateau tectonic karst and the relevant karst groundwater circulation mode in Mount Genie and Zaya sections along the Sichuan-Xizang Railway

• Published in: Shuiwen Dizhi Gongcheng Dizhi Vol. 48; no. 5; pp. 34 - 45
• Main Authors: Xiangquan LI, Jianfei MA, Chunchao ZHANG, Zhenxing WANG, Changchang FU, Zhanxue BAI
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Hydrogeology & Engineering Geology 01.09.2021
• Subjects: evolution regularity; groundwater; sichuan-tibet railway; tectonic karst; water circulation model
• ISSN: 1000-3665
• DOI: 10.16030/j.cnki.issn.1000-3665.202104005

Construction of the Sichuan-Tibet Railway may face significant geological safety risks of water inrush and mud inrush in the plateau tectonic karst region. It is of great scientific and practical significance to carry out research on the evolution regularity of the plateau tectonic karst and the relevant karst groundwater circulation mode for the early prediction and identification of the water inrush and mud inrush disaster in the railway tunnel to be built. Based on the field survey and published literatures, this paper makes an in-depth analysis and draws some conclusions. The tectonic karst development shows obvious sequence characteristics and elevation zonation. The first level to fourth level karst development areas were formed before Miocene, late Miocene to Pliocene, Pliocene and Pliocene to Pleistocene, and occur in the elevation range of 4900−5300 m, 4000−4300 m, 3700−3800 m and 2900−3200 m, respectively. Active faults obviously control the distribution and enrichment of karst groundwater. Since th