THE STABILITY OF SOIL-ROCK MIXTURE SLOPES UNDER COMBINED EFFECTS OF RAINFALL AND TUNNEL EXCAVATION

Authors

  • HongYun Yang State Key Laboratory of Mountain Bridge and Tunnel Engineering, College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China.
  • LinFei Xiong State Key Laboratory of Mountain Bridge and Tunnel Engineering, College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China.
  • YaKe Ma State Key Laboratory of Mountain Bridge and Tunnel Engineering, College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China.
  • Yong Li (Corresponding Author) State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China.
  • Zhi Lin State Key Laboratory of Mountain Bridge and Tunnel Engineering, College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China.
  • Qing Liu China Gezhouba Group Explosive Corp., Ltd, Chongqing 401121, China.
  • Xiang Chen State Key Laboratory of Mountain Bridge and Tunnel Engineering, College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China.

Keywords:

Soil-rock mixture, Rainfall, Tunnel excavation, Coupling effect, Slope stability

Abstract

Because of their heterogeneous composition, soil-rock mixture (SRM) slopes respond strongly to both rainfall infiltration and tunnel excavation. In the model test, heavy rainfall was applied while two tunnels were excavated, and water content, deformation, and earth pressure were monitored continuously. Settlement accumulated rapidly at the beginning of the test as infiltration increased the soil mass weight and reduced shear strength. The subsequent increase became slower with further excavation. Lateral displacement, by contrast, showed a distinct sudden change before entering a period of gradual development. Earth pressure passed through three stages: relative stability, rapid change, and subsequent adjustment. The test results show that rainfall-induced weakening and excavation-related stress redistribution acted together to control the slope response, providing experimental support for stability assessment under similar conditions.

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Published

2026-09-30

Issue

Vol. 8 No. 4 (2026)

Section

Articles

DOI:

https://doi.org/10.61784/ejst3165

How to Cite

HongYun Yang, LinFei Xiong, YaKe Ma, Yong Li, Zhi Lin, Qing Liu, Xiang Chen. The Stability Of Soil-Rock Mixture Slopes Under Combined Effects Of Rainfall And Tunnel Excavation. Eurasia Journal of Science and Technology. 2026, 8(4): 57-69. DOI: https://doi.org/10.61784/ejst3165.