Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Layered pouring unreinforced hybrid steel fiber concrete shield segment and manufacturing method thereof
The invention discloses a layered pouring unreinforced hybrid steel fiber concrete shield segment which is of an arc-shaped structure and sequentially comprises a first steel fiber concrete layer and a second steel fiber concrete layer from the inner arc face to the outer arc face of the shield segment. The first steel fiber concrete layer is prepared from the following raw materials: long steel fibers, short steel fibers, cement, a water reducing agent, coarse aggregates, fine aggregates and fly ash; the second steel fiber concrete layer is prepared from the following raw materials: short steel fibers, cement, a water reducing agent, coarse aggregate, fine aggregate and fly ash. The invention relates to a steel fiber reinforced concrete shield segment which comprises two steel fiber reinforced concrete layers, one layer is a long and short steel fiber reinforced concrete layer, and the other layer is a short steel fiber reinforced concrete layer. The long steel fiber and the short steel fiber are mixed, the short steel fiber has a reinforcing effect on a concrete matrix and mainly inhibits occurrence of cracks in the early stage, the long steel fiber mainly delays expansion of the cracks in the later stage and transmits and bears shearing force at the cracks, and the early-stage effect and the later-stage effect are different and have complementary advantages.
本发明公开了一种分层浇筑无筋混杂钢纤维混凝土盾构管片，所述盾构管片呈弧形结构，从所述盾构管片的内弧面至外弧面依次包括：第一钢纤维混凝土层和第二钢纤维混凝土层；所述第一钢纤维混凝土层原料包括：长钢纤维、短钢纤维、水泥、减水剂、粗骨料、细骨料和粉煤灰；所述第二钢纤维混凝土层原料包括：短钢纤维、水泥、减水剂、粗骨料、细骨料和粉煤灰。本发明钢纤维混凝土盾构管片，有两层钢纤维混凝土层，一层为长+短钢纤维混凝土层，一层为短钢纤维混凝土层。长短钢纤维混杂，短钢纤维对混凝土基体有增强作用，主要在前期抑制裂缝的出现，长钢纤维主要在后期延缓裂缝的扩展，传递并承担裂缝处的剪力，前期作用与后期作用不同，优势互补。
Layered pouring unreinforced hybrid steel fiber concrete shield segment and manufacturing method thereof
The invention discloses a layered pouring unreinforced hybrid steel fiber concrete shield segment which is of an arc-shaped structure and sequentially comprises a first steel fiber concrete layer and a second steel fiber concrete layer from the inner arc face to the outer arc face of the shield segment. The first steel fiber concrete layer is prepared from the following raw materials: long steel fibers, short steel fibers, cement, a water reducing agent, coarse aggregates, fine aggregates and fly ash; the second steel fiber concrete layer is prepared from the following raw materials: short steel fibers, cement, a water reducing agent, coarse aggregate, fine aggregate and fly ash. The invention relates to a steel fiber reinforced concrete shield segment which comprises two steel fiber reinforced concrete layers, one layer is a long and short steel fiber reinforced concrete layer, and the other layer is a short steel fiber reinforced concrete layer. The long steel fiber and the short steel fiber are mixed, the short steel fiber has a reinforcing effect on a concrete matrix and mainly inhibits occurrence of cracks in the early stage, the long steel fiber mainly delays expansion of the cracks in the later stage and transmits and bears shearing force at the cracks, and the early-stage effect and the later-stage effect are different and have complementary advantages.
本发明公开了一种分层浇筑无筋混杂钢纤维混凝土盾构管片，所述盾构管片呈弧形结构，从所述盾构管片的内弧面至外弧面依次包括：第一钢纤维混凝土层和第二钢纤维混凝土层；所述第一钢纤维混凝土层原料包括：长钢纤维、短钢纤维、水泥、减水剂、粗骨料、细骨料和粉煤灰；所述第二钢纤维混凝土层原料包括：短钢纤维、水泥、减水剂、粗骨料、细骨料和粉煤灰。本发明钢纤维混凝土盾构管片，有两层钢纤维混凝土层，一层为长+短钢纤维混凝土层，一层为短钢纤维混凝土层。长短钢纤维混杂，短钢纤维对混凝土基体有增强作用，主要在前期抑制裂缝的出现，长钢纤维主要在后期延缓裂缝的扩展，传递并承担裂缝处的剪力，前期作用与后期作用不同，优势互补。
Layered pouring unreinforced hybrid steel fiber concrete shield segment and manufacturing method thereof
分层浇筑无筋混杂钢纤维混凝土盾构管片及其制造方法
MENG GUOWANG (Autor:in) / QI NI (Autor:in) / WU BO (Autor:in) / WEI YAOWEN (Autor:in) / WEI YU (Autor:in) / LIU JIALE (Autor:in) / XING YUNING (Autor:in) / LUO RUNSEN (Autor:in) / ZUO YIMING (Autor:in) / YE HUAZHENG (Autor:in)
22.11.2022
Patent
Elektronische Ressource
Chinesisch
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