Three-dimensional Numerical Analysis of Stress and Deformation of Soft Soil-pile group-pile Cap System under Coal Pile Load

South pile foundation of Ma On Shan Yangtze River Highway Bridge is big, deep, soft soil, groundwater rich. In order to guarantee the safeties of the foundation, its foundation pit supporting schemes are compared, selected and calculated, finally lock mouth steel pipe support is selected as the design and construction scheme. The three-dimensional simulation analysis of the scheme is calculated by using MIDAS software, simulated four construction condition is presented, and stress and deformation results of retaining structure on various operating conditions is obtained. The calculation results show that the palisade structure basic satisfies the requirements of caps excavation and caps concrete construction. The results of construction show that the construction method, model and parameters used in this paper are basic right, the reasonableness of Supporting is confirmed and for the similar large foundation pit construction provides useful reference.

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Influence of Surcharge Load on the Adjacent Pile Foundation in Coastal Floodplain

Insight - Civil Engineering ◽

10.18282/ice.v3i1.312 ◽

2020 ◽

Vol 3 (1) ◽

Author(s):

Hao Zhang ◽

Kai Sun

Keyword(s):

Soft Soil ◽

Three Dimensional ◽

Bending Moment ◽

Double Row ◽

Pile Cap ◽

Dimensional Finite Element ◽

Surcharge Load ◽

Soft Substratum ◽

And Migration ◽

Three Dimensional Finite Element

<p><strong> </strong>In this paper, in order to investigate the behavior of existing piles caused by the horizontal and compression deformation of soft substratum due to backfill surcharge on coastal floodplain, three-dimensional finite element models of piles adjacent to surcharge load were established. The deformation and migration law of soft soil was analyzed. The behavior of single pile and double row pile adjacent to surcharge load were studied, in which the influence of surcharge load location, surcharge pressure, pile stiffness, and pile top constraint conditions were considered. The results show that as the position of surcharge load is closer and the surcharge pressure increases, the response (e.g. deformation and bending moment) is more obvious. With the increase of pile stiffness, the range of passive load is increased. The deformation behavior of pile body under different constraints of pile cap is significantly different. The effect of secondary bending moment caused by pile axial force is obvious and cannot be ignored. If there is a thick soft substratum, it is beneficial to improve the behavior of adjacent piles by using cement mixing pile reinforcement.</p>

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Integrated assessment of the hydrodynamic added mass of the deep-water pile-cap foundation considering pile group - pile cap interaction

Ocean Engineering ◽

10.1016/j.oceaneng.2021.110418 ◽

2022 ◽

Vol 244 ◽

pp. 110418

Author(s):

Jiarui Zhang ◽

Kai Wei ◽

Jianzhong Li

Keyword(s):

Deep Water ◽

Integrated Assessment ◽

Pile Group ◽

Added Mass ◽

Pile Cap ◽

Group Pile

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Numerical Analysis of Working Performance of Pile Group Embedded in Soft Soil Subjected to Coal Loading

DEStech Transactions on Computer Science and Engineering ◽

10.12783/dtcse/icmsa2018/23235 ◽

2018 ◽

Author(s):

Ai-bin XI ◽

Teng WANG ◽

Kun MENG ◽

Zhi-meng LIANG ◽

Guo-lei XING

Keyword(s):

Numerical Analysis ◽

Soft Soil ◽

Pile Group ◽

Working Performance

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MODELISASI ANALISIS NUMERIK GAYA LATERAL PADA ELEVATED REINFORCED CONCRETE PILE CAP PADA TANAH NON KOHESIF

Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan ◽

10.24912/jmstkik.v5i1.8984 ◽

2021 ◽

Vol 5 (1) ◽

pp. 111

Author(s):

Alvin Lo ◽

Hendy Wijaya ◽

Amelia Yuwono

Keyword(s):

Reinforced Concrete ◽

Numerical Analysis ◽

Sandy Soil ◽

Pile Group ◽

Lateral Force ◽

Pile Groups ◽

The Road ◽

Concrete Pile ◽

Earthquake Force ◽

Pile Cap

Bridges are construction structures that are built to connect parts of the road that are cut off by obstacles such as deep valleys, irrigation channel paths. In order to build a bridge, a strong, economical and easy to build foundation is needed to carry gravity loads and also earthquake force. A common problem encountered in bridge foundation is the occurrence of erosion around the piles due to scouring of water which causes exposing some portion of the piles, which are often referred as elevated reinforced concrete pile-cap foundations. In this study, a numerical analysis of pile groups on elevated reinforced concrete pile-cap foundations is carried out with lateral forces on sandy soil to see the ductility behavior of piles using geotechnical-based programs and to compare the results with the previous studies. The analysis includes the pilecap model and the soil-to-pile interaction and also considers the pile group effect. The analysis was carried out to see the structural and geotechnical conditions on the ductility behavior of a partially embedded piles on sandy soil. The result obtained is a comparison of the ductility and overstrength values that can be used as a consideration in designing elevated reinforced concrete pile-cap foundations.Keywords: Elevated RC pile-cap foundations; numerical analysis; lateral force; ductility AbstrakJembatan adalah struktur konstruksi yang dibangun untuk menghubungkan bagian jalan yang terputus oleh rintangan-rintangan seperti lembah yang dalam, alur saluran irigasi. Untuk membangun sebuah jembatan, diperlukan fondasi yang kuat, ekonomis dan mudah untuk dibangun untuk memikul beban dari jembatan dan juga gaya gempa. Masalah yang umum ditemui pada konstruksi fondasi jembatan adalah terjadinya erosi pada sekitar fondasi dikarenakan gerusan air yang menyebabkan tanah terangkat dan memperlihatkan sebagian tiang fondasi, yang sering disebut dengan elevated reinforced concrete pile-cap foundations. Pada penelitian ini dilakukan analisis secara numerik terhadap kelompok tiang pada elevated reinforced concrete pile-cap foundations yang dibebani gaya lateral pada tanah berpasir untuk melihat perilaku daktilitas tiang dengan bantuan program berbasis geoteknik dan membandingkan dengan hasil penelitian terdahulu. Analisis menyertakan model kepala tiang dan hubungan antara tanah dengan tiang serta mempertimbangkan efek kelompok tiang. Analisis dilakukan untuk melihat kondisi struktural dan geoteknikal pada perilaku daktilitas fondasi yang ditanam sebagian pada tanah pasir. Hasil yang didapatkan adalah perbandingan nilai daktilitas dan overstrength yang dapat digunakan sebagai pertimbangan dalam mendesain elevated reinforced concrete pile-cap foundations.

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