| 是否进口：否 | 产地：衡水力能 | 牌号：12123 |
| 品名：钢波纹涵管 | 型号：AD21.2 | 货号：2131 |
| 公称外径：2000mm | 材质：Q235 | 用途：公路隧道 |
| 壁厚：3mm | 结构形式：单壁波纹管 | 温度范围：120度 |
| 长度：3m | 品牌：力能 | Q235：Q345 |
United States took the lead in the feasibility study of metal corrugated culverts and culverts. Later, in the construction of highways in the United States, Canada, Australia and other countries, metal corrugated culverts were used for the construction of culverts. In 1990, the design of the Japanese expressway standardized and formulated the technical specifications for the design of Guanhan. With the installation and use of metal bellows around the world, the versatility of this structure in various applications has been demonstrated. After China&锛�39;s reform and opening up, Shenzhen and Datong coal mines began to import finished metal bellows from abroad to carry out culvert construction. Afterwards, the Shanghai Municipal Highway Management Office, the Shanghai Municipal Engineering Design Institute, and Shanghai Tongji University conducted dynamic and static tests on metal corrugated culverts. The results showed that they could meet the design and use requirements, fill the gaps in China, and were quickly promoted and applied. Metal corrugated pipes were put into the construction of Qinghai highway. Three years of practice proved that metal corrugated pipes fully meet the requirements of culvert construction in the cold areas of the Nor
