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针对重力式方块码头竣工投产使用后,门机前后轨由于不均匀沉降而导致高差过大的问题,采取预留沉降量和对前后轨预先储备调节高度能力的措施是一种行之有效的方法.“,”In veiw of the excessive nonuniform settlement at the rear and front rails of a gantry crane after the completion and operation of the gravity quay wall, the reserved settlement and the stored capacity for adjusting elevation of the rear and front rails are taken as one of the effective measures.