The invention relates to an FRP (fiber reinforce plastic) tube-concrete-steel tube combined tube tower comprising an inner steel tube, an FRP outer tube and a concrete layer, wherein the inner steel tube is formed by connecting a plurality of steel tube segments, the FRP outer tube is formed by conn.....
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One kind of soil nail pullout test box, comprising: a test box body, the left and right sides (ie soil nails tail and front) were provided with a convex body connected to pass this test case of a first chamber and an additional second additional chamber, the test box body and said first additional s.....
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Disclosed is an extendible emergency bump guard post arranged underground comprising a base with open top, a post placed in the base not in use and in vertical place in use and a protecting hood movably connected with one end of the base, wherein when the post is located in the vertical or horizonta.....
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一种使用废弃煤灰制造的自密实混凝土及其该混凝土的制造方法，其特征是用废弃煤灰取代原有自密实混凝土技术中的传统添加剂和化学流动剂，使使用本发明技术制造的自密实混凝土的成本比使用原有技术制造的自密实混凝土降低，而质量相等或略有提高。
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The invention provides a concrete paving brick capable of clarifying air produced by using building waste and recycled glass and the manufacturing method thereof. The paving brick comprises an absorption layer and a foundation layer, the absorption layer comprises cement, aggregate, titanium oxide a.....
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