The stress state of the slope first depends on the original stress state
Published:
2019-12-12
The stress state of slope depends on the original stress state first. Large horizontal tectonic residual stress often exists in areas with strong neotectonic movement, and stress concentration is often formed near the free surface of slope rock mass, which is most obvious in the tensile stress zone at the foot of slope and at the top of slope
The stress state of slope depends on the original stress state first. Large horizontal tectonic residual stress often exists in areas with strong neotectonic movement, and stress concentration is often formed near the free surface of slope rock mass, which shows Z obvious in tensile stress zone at the foot of slope and at the top of slope
The geometric state of slope is the main factor affecting the stress distribution of slope Slope geometry mainly refers to slope gradient, followed by gully bottom width and slope type With the increase of gradient, the range of tensile stress zone at the top of slope and slope surface expands, and the Z shear stress in the stress concentration zone at the foot of slope also increases The rock and soil mass at the bottom of the gully is in a state of compression due to the downward sliding trend of the rock and soil mass on the gully slope. The stress increases and the deformation intensifies, which is mainly manifested near the foot of the slope. When the width of the gully bottom is greater than 0.8 times the height of the slope, this effect weakens. Slope type here refers to the concave and convex slope. The concave slope increases the horizontal compressive stress (intermediate stress) along the slope strike, while the convex slope weakens the horizontal compressive stress or tensile stress appears. The former is beneficial to the stability of the slope and the latter is opposite. It can be seen that the stability of steep slope is worse than that of gentle slope, convex slope and concave slope
The influence of the structural characteristics of slope rock and soil mass on the stress distribution is very complex, which is mainly manifested in the phenomenon of stress concentration or stress retardation along the periphery of structural plane due to the heterogeneity and discontinuity of rock and soil mass. Slope rock and soil structure is the controlling condition of block movement. In the slope, the stress value of the upper wall is higher than that of the lower wall, while the stress value of the hard side at the interface between soft and hard rock and soil increases sharply. It can be seen that the existence of structural plane in slope makes slope stress discontinuous
The geometric state of slope is the main factor affecting the stress distribution of slope Slope geometry mainly refers to slope gradient, followed by gully bottom width and slope type With the increase of gradient, the range of tensile stress zone at the top of slope and slope surface expands, and the Z shear stress in the stress concentration zone at the foot of slope also increases The rock and soil mass at the bottom of the gully is in a state of compression due to the downward sliding trend of the rock and soil mass on the gully slope. The stress increases and the deformation intensifies, which is mainly manifested near the foot of the slope. When the width of the gully bottom is greater than 0.8 times the height of the slope, this effect weakens. Slope type here refers to the concave and convex slope. The concave slope increases the horizontal compressive stress (intermediate stress) along the slope strike, while the convex slope weakens the horizontal compressive stress or tensile stress appears. The former is beneficial to the stability of the slope and the latter is opposite. It can be seen that the stability of steep slope is worse than that of gentle slope, convex slope and concave slope
The influence of the structural characteristics of slope rock and soil mass on the stress distribution is very complex, which is mainly manifested in the phenomenon of stress concentration or stress retardation along the periphery of structural plane due to the heterogeneity and discontinuity of rock and soil mass. Slope rock and soil structure is the controlling condition of block movement. In the slope, the stress value of the upper wall is higher than that of the lower wall, while the stress value of the hard side at the interface between soft and hard rock and soil increases sharply. It can be seen that the existence of structural plane in slope makes slope stress discontinuous
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2022-12-13
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