A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
DIFFERENT DIAMETER STEEL PIPE PILE
PROBLEM TO BE SOLVED: To provide a steel pipe pile which achieves both the improvement of horizontal yield strength with respect to a horizontal load in an earthquake and the increase in horizontal strength of the peripheral ground.SOLUTION: A different diameter steel pipe pile includes a large diameter portion 11 in an upper end side, a small diameter portion 13 in a lower end side, and a tapered portion 12 of which diameter is reduced toward the small diameter portion 13 from the large diameter portion 11. A thickness t2 of the tapered portion 12 is constant, and a diameter reduction rate calculated by the following equation (1) is 1.5/100-10/100. Diameter reduction rate=(D-d)/2L...(1), wherein D represents an outside diameter (mm) of the large diameter portion, d represents an outside diameter (mm) of the small diameter portion, and L represents a length (mm) of the tapered portion.SELECTED DRAWING: Figure 1
【課題】地震時の水平荷重に対する水平耐力の向上と、周辺地盤の水平強度の増加とを両立させた鋼管杭を提供する。【解決手段】上端側の大径部１１と、下端側の小径部１３と、大径部１１から小径部１３に向けて縮径するテーパ部１２とを有し、テーパ部１２は、板厚ｔ２が一定であり、式（１）で求められる縮径率が１．５／１００〜１０／１００である。縮径率＝（Ｄ—ｄ）／２Ｌ ・・・（１）ただし、Ｄ：大径部の外径（ｍｍ）、ｄ：小径部の外径（ｍｍ）、Ｌ：テーパ部の長さ（ｍｍ）【選択図】図１
DIFFERENT DIAMETER STEEL PIPE PILE
PROBLEM TO BE SOLVED: To provide a steel pipe pile which achieves both the improvement of horizontal yield strength with respect to a horizontal load in an earthquake and the increase in horizontal strength of the peripheral ground.SOLUTION: A different diameter steel pipe pile includes a large diameter portion 11 in an upper end side, a small diameter portion 13 in a lower end side, and a tapered portion 12 of which diameter is reduced toward the small diameter portion 13 from the large diameter portion 11. A thickness t2 of the tapered portion 12 is constant, and a diameter reduction rate calculated by the following equation (1) is 1.5/100-10/100. Diameter reduction rate=(D-d)/2L...(1), wherein D represents an outside diameter (mm) of the large diameter portion, d represents an outside diameter (mm) of the small diameter portion, and L represents a length (mm) of the tapered portion.SELECTED DRAWING: Figure 1
【課題】地震時の水平荷重に対する水平耐力の向上と、周辺地盤の水平強度の増加とを両立させた鋼管杭を提供する。【解決手段】上端側の大径部１１と、下端側の小径部１３と、大径部１１から小径部１３に向けて縮径するテーパ部１２とを有し、テーパ部１２は、板厚ｔ２が一定であり、式（１）で求められる縮径率が１．５／１００〜１０／１００である。縮径率＝（Ｄ—ｄ）／２Ｌ ・・・（１）ただし、Ｄ：大径部の外径（ｍｍ）、ｄ：小径部の外径（ｍｍ）、Ｌ：テーパ部の長さ（ｍｍ）【選択図】図１
DIFFERENT DIAMETER STEEL PIPE PILE
異径鋼管杭
MATSUMIYA HIRONOBU (author) / ISHIHAMA YOSHIRO (author) / SUGIMURA YUJI (author)
2017-08-24
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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