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为探索平板载荷试验中支墩荷载及承压板荷载会对地基土体产生破坏的情况,结合滑移线理论,采用数值计算方法,分析了多因素影响下的载荷试验周围土体破坏区域。结果表明,在相同荷载作用下,粘土滑移破坏范围值与理论值相差不大;内摩擦角相同时,不同荷载作用下的粘土滑移破坏范围值相同;当基础宽度与支墩间距变化时,土体破坏均在某一特定区域内;当基础与支墩的间距固定时,一定载重下,土体破坏区域将随基础宽度的增大而增大,但当基础足够大时,基础对载重在土体面上作用的压强值达不到地基土的极限承载力,土体将不会破坏。
In order to explore the situation that the pier load and bearing plate load will damage the foundation soil in the plate load test, the soil damage area around the load test under the multi-factor influence is analyzed by numerical method combined with the slip line theory. The results show that under the same load, the value of clay slip failure range is not much different from the theoretical value. When the internal friction angle is the same, the range of clay slip damage under the same load is the same. , The soil failure is in a certain area. When the distance between the foundation and the abutment is fixed, under certain load, the soil damage area will increase with the increase of the foundation width, but when the foundation is large enough, the foundation pair The pressure value of the load acting on the soil surface can not reach the ultimate bearing capacity of the foundation soil and the soil will not be damaged.