The bearing capacity of root pile was usually calculated via the deterministic safety coefficient method without considering the randomness of materials′ characters and geometrical features. Given this, in order to evaluate the reliability of root pile′s bearing capacity more scientifically and reasonably, a reliability analysis method was used to analyze the parameter sensitivity of the main factors affecting the safety coefficient of the tunnel. The results show that: (1) the calculation result of reliability analysis method which considers parameter randomness is less than that of the deterministic safety coefficient method, thus the reliability assessment of root piles′ bearing capacity inclines to the safe side; (2) the influence of root pile′s inclination angle on its bearing capacity declines as the increase of its inclination angle; (3) the variability of random variables have a greater impact on root pile′s bearing capacity. Therefore, the parameters of root pile should be tested and analyzed as much as possible in practical engineering to confirm the probability distribution parameters according with the actual condition. For ensuring the construction quality of root pile and the reliability of its bearing capacity, effective control measures should be taken to reduce the risk and randomness in construction of root piles.
朱增辉，李卓丹，黎宣伯
. Safety Evaluation on Bearing Capacity of Root Pile Based on Reliability Analysis: A Case Study of Foundation Reinforcement of Tunnel′s Weak Surrounding Rock[J]. Transport Research, 2021
, 7(1)
: 133
-140
.
DOI: 10.16503/j.cnki.2095-9931.2021.01.015
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