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The first shield section of the subway uses glass fiber reinforced concrete retaining piles

In the construction of subway shields, glass fiber reinforced plastics are used to replace the traditional steel bars in the current retaining piles. The result of the research on the application of "glass fiber reinforced plastics in the maintenance piles of shield end wells" jointly completed by Chengdu Rail Transit Group Co., Ltd., Southwest Jiaotong University and the Second Institute of Iron and Steel, passed the identification of experts from the Provincial Science and Technology Department. It is reported that the use of fiberglass reinforced retaining piles in all shield sections of the entire line is the first time in the country's already built subway lines.