Experimental study on the ultimate bearing capacity of adjacent slope rock foundation
In view of the safety problems of rock foundation on slope existing in engineering,this paper makes a rock foundation model on slope by using barite powder,river sand,cement and gypsum as similar materials,and conducts comparative tests to study the influence of different slopeβand slope top distance B/b on the ultimate bearing capacity of rock foundation on slope.The results show that:①As the slope of the rock foundation model increases,the ultimate bearing capacity of the rock foundation model on the slope decreases significantly.Compared with the 30° model,the ultimate bearing capacity of the 45° model decreases by 25％;compared with the 30° model,the 60° model decreases by 45.8％;②As the loading point keeps moving away from the rock slope,the ultimate bearing capacity of rock foundation on the adjacent slope increases significantly.Compared with the B/b=0 model,the ultimate bearing capacity increases by 5.8％for the B/b=0.5 model,and 23.5％for the B/b=1 model.③When the load corresponding to the bearing capacity characteristic value is applied,the displacement values of the calculated prototypes are all small.And the corresponding positions of the Q-S curve are located in the straight line segment,which does not reach the scale limit,and is verified by the actual monitoring data.Meanwhile,the rock foundation stability is checked,and the rock slope stability checking formula is designed according to the soil slope formula,which can meet the relevant requirements.
rock foundation on slopesimilar materialmodel testultimate bearing capacity
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