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 Study on the influence of soft ground strength under embankment to stability of full height piled bridge abutments
Tác giả hoặc Nhóm tác giả: Pham Anh Tuan - Do Huu Dao
Nơi đăng: Hội thảo quốc gia Hạ tầng giao thông với phát triển bền vững TISDC2016; Số: ISBN 978-604-82-1809-6;Từ->đến trang: 389-400;Năm: 2016
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Trong nước
TÓM TẮT
ABSTRACT: Full height bridge abutments supported on foundation piled through soft clay are frequently exposed to lateral interaction effects associated with soil movement relative to the structure. The lateral structure loading and accompanying displacements arising from the surchaging action of the embankment fill material on the clay layer will be concerned of particular concern at the seviceability limit state, since damage to bearing, bridge deck or abutment structure may result. However, design proceduces for full height pied bridge abutments for this purpose are not well developed. Therefore, the effect of clay layer depth, rate of embankment construction and stiffness of soft ground have been investigated in this paper. The scope of this paper is the analysis of full-height embankment behind abutment on geosynthetic reinforced pile supported (GRPS), with a commercially available finite element software. The effect of soft ground strength to stability of abutment structure are investigated through consideration and comparison between untreament cases and cases supported by GRPS solution. Some factors considered include changing pile spacing, reinforced region and changing length of piles DM (Deep-Mixing). The result presented in this paper include the displacement of embankment, abutment wall and front pile row as well as bending moment of abutment wall, since they are the most critical parameters of observation and design. The results of this study are intended to provide some guidelines for designers, and to bring insight about the interacting mechanisms into the design process. Keywords: Soft ground strength, bridge abutment wall, front pile, displacement, GRPS solution
ABSTRACT
ABSTRACT: Full height bridge abutments supported on foundation piled through soft clay are frequently exposed to lateral interaction effects associated with soil movement relative to the structure. The lateral structure loading and accompanying displacements arising from the surchaging action of the embankment fill material on the clay layer will be concerned of particular concern at the seviceability limit state, since damage to bearing, bridge deck or abutment structure may result. However, design proceduces for full height pied bridge abutments for this purpose are not well developed. Therefore, the effect of clay layer depth, rate of embankment construction and stiffness of soft ground have been investigated in this paper. The scope of this paper is the analysis of full-height embankment behind abutment on geosynthetic reinforced pile supported (GRPS), with a commercially available finite element software. The effect of soft ground strength to stability of abutment structure are investigated through consideration and comparison between untreament cases and cases supported by GRPS solution. Some factors considered include changing pile spacing, reinforced region and changing length of piles DM (Deep-Mixing). The result presented in this paper include the displacement of embankment, abutment wall and front pile row as well as bending moment of abutment wall, since they are the most critical parameters of observation and design. The results of this study are intended to provide some guidelines for designers, and to bring insight about the interacting mechanisms into the design process. Keywords: Soft ground strength, bridge abutment wall, front pile, displacement, GRPS solution
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