Steel tube take full advantage of the expansion properties of expansive concrete, have a greater chemical prestressing, and make higher lateral prestress for core concrete.

钢管充分利用了膨胀混凝土的膨胀能，能够产生较大的化学预应力，为核心混凝土提供较高的侧向预应力；

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External prestressing CFRP can give full play to the strength of CFRP to improve the structure of the normal use performance and ultimate bearing capacity.

使用体外预应力碳纤维板加固受弯构件，可以充分发挥碳纤维板的强度，提高结构的正常使用性能和极限承载能力。

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