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A platform for research: civil engineering, architecture and urbanism
VIADUCT STATE MONITORING APPARATUS AND VIADUCT STATE MONITORING METHOD
PROBLEM TO BE SOLVED: To provide a viaduct state monitoring apparatus and state monitoring method, capable of evaluating whether or not abnormality has occurred at a pile head of a pillar positioned in the vicinity of an underground beam, a foundation, without using visual confirmation.SOLUTION: A viaduct state monitoring apparatus for a viaduct A including an underground beam 3 and pile foundation 2, foundations, a pillar 4 fixed on the underground beam 3, and an upper floor beam 5 fixed on the crown of the pillar 4 comprises: a vibration measurement instrument 11, installed on a pillar base part 10 of the pillar 4 positioned in the vicinity of the underground beam 3 and pile foundation 2, for measuring a vibration obtained by striking or vibrating the pillar base part 10; calculation recording means 13 for calculating and recording a natural frequency in a pile head secondary mode on the basis of a detection value from the vibration measurement instrument 11; and evaluation means 14 for monitoring whether or not reduction in the natural frequency in the pile head secondary mode has occurred on the basis of output from the calculation recording means 13 to perform structure soundness determination by evaluating a damage state of the pile foundation 2 of the viaduct on the basis of a monitoring result.SELECTED DRAWING: Figure 1
【課題】この発明は、目視確認によらず、基礎となる地中梁近傍に位置する柱の杭頭部に異常が生じているか否かを評価することができる、高架橋の状態監視装置及び状態監視方法を提供する。【解決手段】基礎となる地中梁３および杭基礎２と、該地中梁３に固定された柱４と、該柱４の天端部に固定された上床梁５とを有する高架橋Ａであって、地中梁３および杭基礎２の近傍に位置する柱４の柱基部１０に設置されて該柱基部１０を打撃又は起振させることにより得た振動を計測する振動計測器１１と、該振動計測器１１からの検出値に基づき杭頭２次モードの固有振動数を演算しかつ記録する演算記録手段１３と、該演算記録手段１３からの出力に基づき杭頭２次モードの固有振動数に低下が生じたか否かを監視し、その監視結果に基づき高架橋の杭基礎２の損傷状態を評価した構造物の健全度判定する評価手段１４と、を具備する。【選択図】図１
VIADUCT STATE MONITORING APPARATUS AND VIADUCT STATE MONITORING METHOD
PROBLEM TO BE SOLVED: To provide a viaduct state monitoring apparatus and state monitoring method, capable of evaluating whether or not abnormality has occurred at a pile head of a pillar positioned in the vicinity of an underground beam, a foundation, without using visual confirmation.SOLUTION: A viaduct state monitoring apparatus for a viaduct A including an underground beam 3 and pile foundation 2, foundations, a pillar 4 fixed on the underground beam 3, and an upper floor beam 5 fixed on the crown of the pillar 4 comprises: a vibration measurement instrument 11, installed on a pillar base part 10 of the pillar 4 positioned in the vicinity of the underground beam 3 and pile foundation 2, for measuring a vibration obtained by striking or vibrating the pillar base part 10; calculation recording means 13 for calculating and recording a natural frequency in a pile head secondary mode on the basis of a detection value from the vibration measurement instrument 11; and evaluation means 14 for monitoring whether or not reduction in the natural frequency in the pile head secondary mode has occurred on the basis of output from the calculation recording means 13 to perform structure soundness determination by evaluating a damage state of the pile foundation 2 of the viaduct on the basis of a monitoring result.SELECTED DRAWING: Figure 1
【課題】この発明は、目視確認によらず、基礎となる地中梁近傍に位置する柱の杭頭部に異常が生じているか否かを評価することができる、高架橋の状態監視装置及び状態監視方法を提供する。【解決手段】基礎となる地中梁３および杭基礎２と、該地中梁３に固定された柱４と、該柱４の天端部に固定された上床梁５とを有する高架橋Ａであって、地中梁３および杭基礎２の近傍に位置する柱４の柱基部１０に設置されて該柱基部１０を打撃又は起振させることにより得た振動を計測する振動計測器１１と、該振動計測器１１からの検出値に基づき杭頭２次モードの固有振動数を演算しかつ記録する演算記録手段１３と、該演算記録手段１３からの出力に基づき杭頭２次モードの固有振動数に低下が生じたか否かを監視し、その監視結果に基づき高架橋の杭基礎２の損傷状態を評価した構造物の健全度判定する評価手段１４と、を具備する。【選択図】図１
VIADUCT STATE MONITORING APPARATUS AND VIADUCT STATE MONITORING METHOD
高架橋の状態監視装置及び高架橋の状態監視方法
ISHIHARA TAKUMI (author) / ABE KEITA (author)
2018-01-18
Patent
Electronic Resource
Japanese
IPC:
E01D
BRIDGES
,
Brücken
/
G01H
MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
,
Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen
/
G01N
Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften
,
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
VIADUCT CONSTRUCTION METHOD AND VIADUCT CONSTRUCTION DEVICE
| European Patent Office | 2021