A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
BRIDGE STRUCTURE AGAINST FLOOD
To provide a bridge structure against flood that can reduce force acting on the bridge superstructure during floods or river overflows, and effectively avoid damages to the bridge superstructure.SOLUTION: A bridge structure against flood according to the present invention relates to a bridge superstructure which is constructed by installing slabs 3 on the top of parallel main girders 2, a fairing 4 is provided to cover the bridge superstructure from the side in a form of connecting the lower part of the overhanging part of the slabs 3 to the lower part of the main girders 2, and by providing a shape-retaining material 5 between the lower parts of adjacent main girders 2, deformation is prevented between the main girders 2 against horizontal forces caused by water flow and the shape of the bridge superstructure is maintained. If a grating is used as the shape-retaining material 5, water enters between the main girders 2 from below, buoyancy and hydrostatic pressure on the superstructure are reduced and upward lifting force is suppressed. In addition, an air circulation part 6 that communicates between the top and bottom of the slabs 3 can be provided at the upper position between the main girders 2, or a horizontal penetration part 7 can be provided in the main girders 2 to allow air and water to circulate between the main girders 2.SELECTED DRAWING: Figure 2
【課題】洪水や河川の氾濫時に橋梁上部工への作用力を低減させ、橋梁上部工の損傷を効果的に回避することができる橋梁の洪水対策構造を提供する。【解決手段】本発明の橋梁の洪水対策構造は、並列する主桁２の上部に床版３が架設されてなる橋梁上部工について、床版３の張出部下部から主桁２の下部をつなぐ形で、橋梁上部工を側方から覆うフェアリング４を設け、隣接する主桁２の下部間に形状保持材５を設けることで、水流に起因する水平力に対し、主桁２間の変形を防止し、橋梁上部工の形状を保持する構造となっている。形状保持材５としてグレーティングを用いれば、下面から主桁２間に水が入り、上部工に対する浮力や静水圧を低減させ、上向きの揚力を抑えることができる。また、主桁２間の上部位置に床版３の上下間を連通させる空気流通部６を設けたり、主桁２に水平方向の貫通部７を設け、主桁２間における空気や水の流通を図ることもできる。【選択図】図２
BRIDGE STRUCTURE AGAINST FLOOD
To provide a bridge structure against flood that can reduce force acting on the bridge superstructure during floods or river overflows, and effectively avoid damages to the bridge superstructure.SOLUTION: A bridge structure against flood according to the present invention relates to a bridge superstructure which is constructed by installing slabs 3 on the top of parallel main girders 2, a fairing 4 is provided to cover the bridge superstructure from the side in a form of connecting the lower part of the overhanging part of the slabs 3 to the lower part of the main girders 2, and by providing a shape-retaining material 5 between the lower parts of adjacent main girders 2, deformation is prevented between the main girders 2 against horizontal forces caused by water flow and the shape of the bridge superstructure is maintained. If a grating is used as the shape-retaining material 5, water enters between the main girders 2 from below, buoyancy and hydrostatic pressure on the superstructure are reduced and upward lifting force is suppressed. In addition, an air circulation part 6 that communicates between the top and bottom of the slabs 3 can be provided at the upper position between the main girders 2, or a horizontal penetration part 7 can be provided in the main girders 2 to allow air and water to circulate between the main girders 2.SELECTED DRAWING: Figure 2
【課題】洪水や河川の氾濫時に橋梁上部工への作用力を低減させ、橋梁上部工の損傷を効果的に回避することができる橋梁の洪水対策構造を提供する。【解決手段】本発明の橋梁の洪水対策構造は、並列する主桁２の上部に床版３が架設されてなる橋梁上部工について、床版３の張出部下部から主桁２の下部をつなぐ形で、橋梁上部工を側方から覆うフェアリング４を設け、隣接する主桁２の下部間に形状保持材５を設けることで、水流に起因する水平力に対し、主桁２間の変形を防止し、橋梁上部工の形状を保持する構造となっている。形状保持材５としてグレーティングを用いれば、下面から主桁２間に水が入り、上部工に対する浮力や静水圧を低減させ、上向きの揚力を抑えることができる。また、主桁２間の上部位置に床版３の上下間を連通させる空気流通部６を設けたり、主桁２に水平方向の貫通部７を設け、主桁２間における空気や水の流通を図ることもできる。【選択図】図２
BRIDGE STRUCTURE AGAINST FLOOD
橋梁の洪水対策構造
TONEGAWA TARO (author) / KIMURA SATOSHI (author) / MINE KOSUKE (author) / NORO TADAYUKI (author) / TAKANO NATSUKO (author)
2024-09-30
Patent
Electronic Resource
Japanese
IPC:
E01D
BRIDGES
,
Brücken
| Engineering Index Backfile | 1937
Flood-proof bridge for Binghamton
| Engineering Index Backfile | 1938