Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Graded water-permeable stepped anti-scour protection foot structure for bridge pier
The invention discloses a graded water-permeable stepped pier scour-prevention foot protection structure which is arranged above a riverbed and connected with a pier and is formed by piling a plurality of layers of water-permeable cage nets around the pier in a multi-step shape from the riverbed to the water flow surface, the layers are fixedly connected, the water-permeable cage nets are composed of aggregates and cage nets containing the aggregates, and the water-permeable cage nets are arranged on the riverbed. The porosity of the permeable cage net is sequentially increased from the bottom layer to the upper layer. The graded water-permeable stepped pier anti-scour protection foot structure is arranged around a riverbed type pier to guide internal interaction of water flow, so that front impact water flow of the pier causing scour of the pier and impact water flow caused by drop of water levels in front of and behind the pier are actively eliminated, the shear impact effect of the water flow is weakened, and large-scale shear vortex of scour water flow is eliminated; the impact scouring influence caused by upstream and downstream water level difference is weakened through the interaction of small-scale vortexes and impact scouring water flow, the strong shearing effect of the water flow passing through the pier area is weakened, and scouring damage to the pier is reduced or avoided.
本发明公开了一种分级透水型阶梯式桥墩防冲护脚结构，设置在河床以上并与桥墩衔接，由多层透水型笼网由河床至水流表面呈多级台阶状、并围绕桥墩堆砌而成，各层之间固定连接，所述透水型笼网由骨料和盛装骨料的笼网构成，透水型笼网的孔隙率自底层向上层依次增大。通过在河床式桥墩周围设置分级透水型阶梯式桥墩防冲护脚结构引导水流内部的相互作用，主动消除引起桥墩冲刷的桥墩前正面冲击水流与桥墩前后水位下降导致的冲击水流，减弱水流剪切冲击作用，消除冲刷水流大尺度剪切旋涡，利用小尺度旋涡与冲击冲刷水流的相互作用，减弱上下游水位差导致的冲击冲刷影响，减弱了水流通过桥墩区域的强剪切作用，减小或避免了桥墩的冲刷破坏。
Graded water-permeable stepped anti-scour protection foot structure for bridge pier
The invention discloses a graded water-permeable stepped pier scour-prevention foot protection structure which is arranged above a riverbed and connected with a pier and is formed by piling a plurality of layers of water-permeable cage nets around the pier in a multi-step shape from the riverbed to the water flow surface, the layers are fixedly connected, the water-permeable cage nets are composed of aggregates and cage nets containing the aggregates, and the water-permeable cage nets are arranged on the riverbed. The porosity of the permeable cage net is sequentially increased from the bottom layer to the upper layer. The graded water-permeable stepped pier anti-scour protection foot structure is arranged around a riverbed type pier to guide internal interaction of water flow, so that front impact water flow of the pier causing scour of the pier and impact water flow caused by drop of water levels in front of and behind the pier are actively eliminated, the shear impact effect of the water flow is weakened, and large-scale shear vortex of scour water flow is eliminated; the impact scouring influence caused by upstream and downstream water level difference is weakened through the interaction of small-scale vortexes and impact scouring water flow, the strong shearing effect of the water flow passing through the pier area is weakened, and scouring damage to the pier is reduced or avoided.
本发明公开了一种分级透水型阶梯式桥墩防冲护脚结构，设置在河床以上并与桥墩衔接，由多层透水型笼网由河床至水流表面呈多级台阶状、并围绕桥墩堆砌而成，各层之间固定连接，所述透水型笼网由骨料和盛装骨料的笼网构成，透水型笼网的孔隙率自底层向上层依次增大。通过在河床式桥墩周围设置分级透水型阶梯式桥墩防冲护脚结构引导水流内部的相互作用，主动消除引起桥墩冲刷的桥墩前正面冲击水流与桥墩前后水位下降导致的冲击水流，减弱水流剪切冲击作用，消除冲刷水流大尺度剪切旋涡，利用小尺度旋涡与冲击冲刷水流的相互作用，减弱上下游水位差导致的冲击冲刷影响，减弱了水流通过桥墩区域的强剪切作用，减小或避免了桥墩的冲刷破坏。
Graded water-permeable stepped anti-scour protection foot structure for bridge pier
一种分级透水型阶梯式桥墩防冲护脚结构
YUAN HAO (Autor:in) / WEI WANGRU (Autor:in)
14.03.2023
Patent
Elektronische Ressource
Chinesisch
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