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以虎门二桥坭洲水道桥超大跨度悬索桥锚碇基础为对象,采用规范方法、抗剪强度折减法和等比例增大缆力分析法对锚碇基础的稳定性进行了分析,得到了不同计算方法对应的基础稳定性系数。计算结果表明,当不考虑地连墙作用时,采用强度折减法和等比例增大缆力分析法得到的破坏模式均为滑移破坏,与规范方法计算得到的抗滑移稳定性系数较为接近;当考虑地连墙复合作用后,基础的抗滑移能力得到较大提升,基础的破坏模式将由滑动破坏转变为倾覆破坏,基础的安全系数得到较大幅度提升,地连墙对基础稳定性的提升作用较为明显。
Based on the anchorage foundation of the Huzhouzhou-Suizhou Charolauan bridge super-long-span suspension bridge, the stability of the anchor foundation was analyzed by the standard method, the shear strength reduction method and the proportional increase of the cable force analysis method, and the different calculations The method corresponds to the base stability coefficient. The calculation results show that the failure modes obtained by the strength reduction method and the cable force analysis with equal proportion are all slip damage when the wall-connecting effect is not considered, which is close to the coefficient of anti-slip stability calculated by the standard method When considering the combined action of the wall and the wall, the anti-slip ability of the foundation is greatly improved. The basic failure mode will be changed from sliding failure to overturning failure. The safety factor of the foundation is greatly improved. The stability of the foundation to the foundation The promotion effect is more obvious.