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苏拉马都跨海大桥主桥边墩采用V形墩与引桥相连接,V形墩的两个斜腿不是竖直状态,在斜腿施工过程中,其自重在根部产生向外侧的弯矩,如不采取措施,则斜腿根部受拉开裂。为防止斜腿内侧混凝土开裂,抵消不利弯矩,在斜腿浇筑到一定节段时,使用精轧螺纹钢对拉两侧斜腿,给斜腿施加临时横向预应力。
The main pier of Sulamama Bridge is connected by V-shaped pier to the approach bridge. The two inclined legs of the V-shaped pier are not vertical. During the construction of the inclined leg, the self-weight produces a bending moment to the outside at the root If you do not take measures, then the root of the oblique leg tear open cracking. In order to prevent cracking of the concrete inside the slash leg and counteract the unfavorable bending moment, when the slanting leg is poured to a certain segment, the slab with the rolled steel on both sides of the slant leg and the temporary transverse prestress to the slant leg shall be used.