【摘 要】
：
为指导隧道安全施工,保证路桥的安全运营,对桥梁桥墩稳定性进行评价,运用未确知理论,建立未确知测度评价模型。结合葵坝隧道下穿盐坝高速路桥的工程实际,选取影响桥墩稳定性
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为指导隧道安全施工,保证路桥的安全运营,对桥梁桥墩稳定性进行评价,运用未确知理论,建立未确知测度评价模型。结合葵坝隧道下穿盐坝高速路桥的工程实际,选取影响桥墩稳定性的10个指标构造评价指标体系,依据每个桥墩的指标分级标准构建单指标未确知测度函数,确定每个对象的单指标测度矩阵;用熵权法计算各对象指标的权重,进而得到了对象的多指标综合测度向量;并依据置信度识别准则得出12个桥墩的隶属等级和稳定性排序。结果表明:12个桥墩中,除有1个桥墩处于不稳定等级外,其余都处于稳定等级。
In order to guide the construction of tunnel safety, ensure the safe operation of road and bridge, evaluate the stability of bridge piers, use the unascertained theory to establish the unascertained measure evaluation model. According to the engineering practice of the underpass of Yanba Dam under the Kuaihe tunnel, the index system is constructed based on the ten indexes that affect the stability of piers, and the unascertained measure function of single index is constructed according to the index grading standard of each pier. Single metric measure matrix; calculate the weight of each target index by entropy weight method, and then obtain the multi-index comprehensive measure vector of the object; and according to the confidence criteria, get the rank and stability rank of 12 piers. The results show that, of the 12 bridge piers, all but one of the pier piers are in an unstable level, and the rest are at a stable level.
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