A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To provide a liquefaction countermeasure ground that allows the liquefaction of the ground caused by an earthquake and like to be suppressed in a simple configuration at low cost.SOLUTION: A vibration absorbing material 10 for absorbing vibration is mixed in a liquefaction layer 4 easily liquefied by vibration of an earthquake. The vibration absorbing material 10 is made of resin or rubber elastic material. Thereby, on an application of repeated vibration due to the earthquake, a part of vibration energy is absorbed with the vibration absorbing material 10 to mitigate the vibration. As a consequence, an increase of water pressure in gaps between sand grains in the liquefaction layer 4 is suppressed, which suppresses a deterioration in the bonding of sand grains caused by shear stress and friction. Thus, it is possible to suppress the subsidence of a building 2 caused by lost strength of the ground 1 liquefied due to settled sand grains.SELECTED DRAWING: Figure 1
【課題】地震等によって地盤が液状化するのを簡易な構成で安価に抑制できる液状化対策地盤を提供する。【解決手段】地震の振動によって液状化し易い液状化層４内に、振動を吸収する振動吸収材１０を分散して混合した。振動吸収材１０は、樹脂またはゴム製の弾性材からなる。これにより、地震により繰り返し振動が加わったとき、振動エネルギの一部は振動吸収材１０で吸収され、振動は低減される。その結果、液状化層４内の砂粒子の間隙の水圧が上昇するのが抑えられ、剪断応力、摩擦力による砂粒子同士の結びつきが弱まるのが抑えられる。それにより、砂粒子が沈降し地盤１が液状化して強さが失われ建造物２が沈下するのが抑えられる。【選択図】図１
To provide a liquefaction countermeasure ground that allows the liquefaction of the ground caused by an earthquake and like to be suppressed in a simple configuration at low cost.SOLUTION: A vibration absorbing material 10 for absorbing vibration is mixed in a liquefaction layer 4 easily liquefied by vibration of an earthquake. The vibration absorbing material 10 is made of resin or rubber elastic material. Thereby, on an application of repeated vibration due to the earthquake, a part of vibration energy is absorbed with the vibration absorbing material 10 to mitigate the vibration. As a consequence, an increase of water pressure in gaps between sand grains in the liquefaction layer 4 is suppressed, which suppresses a deterioration in the bonding of sand grains caused by shear stress and friction. Thus, it is possible to suppress the subsidence of a building 2 caused by lost strength of the ground 1 liquefied due to settled sand grains.SELECTED DRAWING: Figure 1
【課題】地震等によって地盤が液状化するのを簡易な構成で安価に抑制できる液状化対策地盤を提供する。【解決手段】地震の振動によって液状化し易い液状化層４内に、振動を吸収する振動吸収材１０を分散して混合した。振動吸収材１０は、樹脂またはゴム製の弾性材からなる。これにより、地震により繰り返し振動が加わったとき、振動エネルギの一部は振動吸収材１０で吸収され、振動は低減される。その結果、液状化層４内の砂粒子の間隙の水圧が上昇するのが抑えられ、剪断応力、摩擦力による砂粒子同士の結びつきが弱まるのが抑えられる。それにより、砂粒子が沈降し地盤１が液状化して強さが失われ建造物２が沈下するのが抑えられる。【選択図】図１
LIQUEFACTION COUNTERMEASURE GROUND
液状化対策地盤
MIZOGUCHI KYOKO (author)
2021-04-08
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
| European Patent Office | 2020
COUNTERMEASURE CONSTRUCTION METHOD AGAINST GROUND LIQUEFACTION
| European Patent Office | 2016