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Deformation Law of Surrounding Rock of Expansive Soil Tunnel Based on Dry–Wet Cycle Model Test

Conference paper
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Part of the Sustainable Civil Infrastructures book series (SUCI)

Abstract

Expansive soil is a kind of geological body with special hazards to the construction engineering. It has the engineering properties of shrinkage, fracture and overconsolidation. Its engineering hazard is rich in water content in soil. The expansive geomaterials can produce wetting and shrinkage deformation, which adversely affect the subgrade, slope and tunnel support structure. In order to solve this problem, the dry and wet cycle model test device was established by simulating the “rain” and “sunshine” cycle, and the typical dry wet circulation, shrinkage and other factors, focusing on the expansion and contraction of soil tunnel rock failure instability development model, the scope and its conditions and the impact of factors such as simulated rainfall under the conditions of the tunnel excavation and support, the stress, strain and deformation of the surrounding rock of the tunnel are analyzed, and the possible damage modes are analyzed, and the mechanism of the surrounding rock disaster in the shrinkage fracture zone is revealed.

Keywords

Dry and wet cycle Model test Expansive soil Tunnel Deformation law 

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Civil EngineeringShandong UniversityJinanChina
  2. 2.Geotechnical and Structural Engineering Research Institute, Shandong UniversityJinanChina

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