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宜service life, which will directly affect the overall strength and durability of prestressed bridges. Some studies have been carried out at home and abroad, most of them using nondestructive testing techniques. It mainly includes impact back wave method(I E), surface wave spectrum imaging method(SASW), ultrasonic imaging 于大垮桥梁使用的较理想的橡胶支座产品。GPZ系列支座目前承载力为1000-5000KN的31个级别,承载力0.8MN-60MN,能满足大型桥梁建造的需要。每个级别固定(GD)单向活动(DX)和双向活动(SX)三种,本系列支座具有建筑UHYG-IJUH波纹管镀锌波纹涵管武汉厂家镀锌波纹管高度UHYG衡水-IJUH波纹管镀锌波纹涵管武汉厂家镀锌波纹管低,滑移面摩擦系数小,承载能力大,转动性能灵活,缓冲性能好,构造简单,重量轻,价格便宜等优点,是建筑连续梁式桥的佳支UHYG-IJUH波纹管镀锌波纹涵管武汉厂家镀锌波纹管UHYG-IJUH波纹管镀锌波纹涵管武汉厂家镀锌波纹管座。UHYG-IJUH波纹管镀锌波纹涵管武汉厂家镀锌波纹管UHYG-IJUH波纹管镀锌波纹涵管武汉厂家镀锌波纹管