Scholarlink

<p>Intermediate principal stress (IPS) may influence the stability of a slope under three-dimensional (3D) failure modes. However, the influence of IPS is seldom considered in slope stability evaluation. In this study, the 3D stability and failure mode of a ridge slope is analyzed by considering the influence of IPS. The mathematical model of double-shear unified strength theory was established using the UMAT subroutine in the Abaqus software. The influence of IPS on the deformation and damage modes of the homogeneous ridge slope was studied using strength reduction method. The results calculated by the Mohr-Coulomb strength criterion were very close to those of the unified strength UMAT subroutine. Both have a safety coefficient of approximately 1.6. When the intermediate principal stress (IPS) coefficient <i>b</i> was 0, the safety factor was 6.95. And when the IPS coefficient increased to 0.2, the stability factor of the double-sided ridge slope was 9.44. The stability of slope was enhanced obviously due to the existence of the IPS. After the excavation of the ridge side slope, the rock mass of ridge slope was not failure easily at the ridge line of the double-sided ridge slope. However, the rock mass at the side of the flank was prone to cracking damage, and extrusion failure was prone to occur at the foot of a slope. The calculation results in this paper provide a new method and knowledge on the concrete evaluation of the failure and stability of a slope.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Ridge slope failure mode analysis using strength reduction method based on double-shear unified strength criterion

  • 期刊论文

  • 发表日期：

    2026年4月1日

查看全文
  • Jianxiu Wang,
  • Pengfei Liu,
  • Pengfei Si,
  • Ansheng Cao,
  • Yanxia Long,
  • Huboqiang Li

摘要

Intermediate principal stress (IPS) may influence the stability of a slope under three-dimensional (3D) failure modes. However, the influence of IPS is seldom considered in slope stability evaluation. In this study, the 3D stability and failure mode of a ridge slope is analyzed by considering the influence of IPS. The mathematical model of double-shear unified strength theory was established using the UMAT subroutine in the Abaqus software. The influence of IPS on the deformation and damage modes of the homogeneous ridge slope was studied using strength reduction method. The results calculated by the Mohr-Coulomb strength criterion were very close to those of the unified strength UMAT subroutine. Both have a safety coefficient of approximately 1.6. When the intermediate principal stress (IPS) coefficient b was 0, the safety factor was 6.95. And when the IPS coefficient increased to 0.2, the stability factor of the double-sided ridge slope was 9.44. The stability of slope was enhanced obviously due to the existence of the IPS. After the excavation of the ridge side slope, the rock mass of ridge slope was not failure easily at the ridge line of the double-sided ridge slope. However, the rock mass at the side of the flank was prone to cracking damage, and extrusion failure was prone to occur at the foot of a slope. The calculation results in this paper provide a new method and knowledge on the concrete evaluation of the failure and stability of a slope.