A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PROBLEM TO BE SOLVED: To provide an artificial shallow ground or tideland that is the artificial shallow ground or tideland using dredging soil as a sand filling material, and a scale of ground improvement of a ground portion for setting a submerged dike is made smaller, and thereby the construction cost can be reduced greatly.SOLUTION: A reinforcement earth layer B of a predetermined width for reinforcing a submerged dike A is provided close to the side in the bank side of the submerged dike A, and the coated stone D is installed so as to cover the surface layer of this reinforcement earth layer B. The reinforcement earth layer B is constituted of the reinforced soil in which the underwater unit volume mass is smaller than the underwater unit volume mass of a submerged dike constitution material and the uniaxial compressive strength after the 28 days curing becomes 10kN/mor more. Also, a portion or all of the surface layer of the reinforcement earth layer B have the gradient rising toward the bank side. The reinforcement earth layer B provided behind the submerged dike A achieves a retaining wall function and a slip failure is hard to occur by an effect of the shear strength of the reinforced soil. Accordingly, the scale of the submerged dike A can be made smaller in comparison with before and the load acting on the natural ground is reduced, and therefore the scale of the ground improvement of the ground portion for setting the submerged dike A can be made smaller in comparison with before.SELECTED DRAWING: Figure 1
【課題】中詰材として浚渫土を用いる人工浅場又は干潟であって、潜堤を設置する地盤部分の地盤改良の規模を小さくすることにより、施工コストを大幅に低減することができる人工浅場又は干潟を提供する。【解決手段】潜堤Ａの岸側に、その側面に接して潜堤Ａを補強する所定幅の補強土層Ｂを設け、この補強土層Ｂの表層を覆うように被覆石Ｄを設置する。補強土層Ｂは、水中単位体積質量が潜堤構成材の水中単位体積質量よりも小さく、且つ２８日養生後の一軸圧縮強さが１０ｋＮ／ｍ２以上となる補強土で構成するとともに、補強土層Ｂの表層の一部又は全部が岸側に向かって高くなる勾配を有する。潜堤Ａの背後に設けた補強土層Ｂが土留め機能を果たすとともに、補強土のせん断強度の効果によりすべり破壊が生じにくくなるため、従来に較べて潜堤Ａの規模を小さくでき、原地盤に作用する荷重が小さくなるため、潜堤Ａを設置する地盤部分の地盤改良の規模を従来に較べて小さくできる。【選択図】図１
PROBLEM TO BE SOLVED: To provide an artificial shallow ground or tideland that is the artificial shallow ground or tideland using dredging soil as a sand filling material, and a scale of ground improvement of a ground portion for setting a submerged dike is made smaller, and thereby the construction cost can be reduced greatly.SOLUTION: A reinforcement earth layer B of a predetermined width for reinforcing a submerged dike A is provided close to the side in the bank side of the submerged dike A, and the coated stone D is installed so as to cover the surface layer of this reinforcement earth layer B. The reinforcement earth layer B is constituted of the reinforced soil in which the underwater unit volume mass is smaller than the underwater unit volume mass of a submerged dike constitution material and the uniaxial compressive strength after the 28 days curing becomes 10kN/mor more. Also, a portion or all of the surface layer of the reinforcement earth layer B have the gradient rising toward the bank side. The reinforcement earth layer B provided behind the submerged dike A achieves a retaining wall function and a slip failure is hard to occur by an effect of the shear strength of the reinforced soil. Accordingly, the scale of the submerged dike A can be made smaller in comparison with before and the load acting on the natural ground is reduced, and therefore the scale of the ground improvement of the ground portion for setting the submerged dike A can be made smaller in comparison with before.SELECTED DRAWING: Figure 1
【課題】中詰材として浚渫土を用いる人工浅場又は干潟であって、潜堤を設置する地盤部分の地盤改良の規模を小さくすることにより、施工コストを大幅に低減することができる人工浅場又は干潟を提供する。【解決手段】潜堤Ａの岸側に、その側面に接して潜堤Ａを補強する所定幅の補強土層Ｂを設け、この補強土層Ｂの表層を覆うように被覆石Ｄを設置する。補強土層Ｂは、水中単位体積質量が潜堤構成材の水中単位体積質量よりも小さく、且つ２８日養生後の一軸圧縮強さが１０ｋＮ／ｍ２以上となる補強土で構成するとともに、補強土層Ｂの表層の一部又は全部が岸側に向かって高くなる勾配を有する。潜堤Ａの背後に設けた補強土層Ｂが土留め機能を果たすとともに、補強土のせん断強度の効果によりすべり破壊が生じにくくなるため、従来に較べて潜堤Ａの規模を小さくでき、原地盤に作用する荷重が小さくなるため、潜堤Ａを設置する地盤部分の地盤改良の規模を従来に較べて小さくできる。【選択図】図１
ARTIFICIAL SHALLOW GROUND OR TIDELAND
人工浅場又は干潟
HONDA HIDEKI (author)
2017-08-17
Patent
Electronic Resource
Japanese
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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