Analysis on Influence Factors of the Ultimate Bearing Capacity for Rock Foundation Close to a Slope Based on Hoek-Brown Criterion

LYU Wenlong; XU Yong; FAN Hao

doi:10.13204/j.gyjzG22050705

Volume 53 Issue 4

Apr. 2023

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LYU Wenlong, XU Yong, FAN Hao. Analysis on Influence Factors of the Ultimate Bearing Capacity for Rock Foundation Close to a Slope Based on Hoek-Brown Criterion[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 131-135. doi: 10.13204/j.gyjzG22050705

Citation:

LYU Wenlong, XU Yong, FAN Hao. Analysis on Influence Factors of the Ultimate Bearing Capacity for Rock Foundation Close to a Slope Based on Hoek-Brown Criterion[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(4): 131-135. doi: 10.13204/j.gyjzG22050705

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Analysis on Influence Factors of the Ultimate Bearing Capacity for Rock Foundation Close to a Slope Based on Hoek-Brown Criterion

doi: 10.13204/j.gyjzG22050705

1. Guangdong Provincial Academy of Building Research Group Co., Ltd., Guangzhou 510500, China;
2. School of Civil Engineering, Guangzhou University, Guangzhou 510006, China

Received Date: 2022-05-07
Available Online: 2023-07-01

Abstract

Abstract

The ultimate bearing capacity of rock foundation is a widely discussed and researched subject in the field of rock mechanics. A finite element model was constructed by MIDAS/GTS Software based on Hoek-Brown Criterion. According to different geo-mechanical indexes, rock mechanical parameters, disturbance factors, ratios of distance form edges of fundations near slopes to width of froundations, and slope angles, the ultimate bearing capacity of rock foundation under strip foundations was explored. The results indicated that: 1) based on Hoek-Brown Criterion, the numerical model of rock foundation close to slopes was constructed by the finite element software MIDAS/GTS according to plane strain. The method for calculating the ultimate bearing capacity of rock foundation under strip foundations close to slopes was reliable; 2) a dimensionless parameter N_σ was defined to measure the influence of slopes on the ultimate bearing capacity of rock foundation. N_σ increased with the increase of the geo-mechanical indexes, and decreased with the increase of the disturbance factor. 3) With the increase of the slope top distance, N_σ gradually increased, but the corresponding N_σ at different slope angles were increasingly similar. Finally, the ultimate bearing capacity of rock foundation close to slopes gradually approached the ultimate bearing capacity of horizontal rock foundation; 4) with the decrease of slope angles, N_σ gradually increased, but N_σ in different ratios of distance from edges of foundetions near slopes to width of foundations were increasingly similar. Finally, the ultimate bearing capacity of rock foundation close to slopes gradually approached the ultimate bearing capacity of horizontal rock foundation.
- Hoek-Brown Criterion,
- rock foundation close to a slope,
- strip foundation,
- ultimate bearing capacity,
- numerical simulation

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References(18)

References

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