In-situ horizontal cyclic loading tests on composite foundation composed of soilbags and piles

Doi, Tatsuya; Murono, Yoshitaka; Zhang, Feng; Hirayama, Yoshiyuki

doi:10.1016/j.sandf.2023.101327

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…However, following aging tests conducted by Matsuoka and Liu [8], it was asserted that soilbags exhibit enhanced durability when manufactured with anti-aging agents in woven bags. This advancement has led to the gradual adoption of these enhanced soilbags in permanent infrastructure projects, including reinforcing foundations [9], building retaining structures [10], and stabilizing slopes [11].…”

Section: Introductionmentioning

confidence: 99%

Study on Non-Limited Earth Pressures of Soilbag-Reinforced Retaining Structures with Surcharge Loads

Bian,

Lai,

Liu

et al. 2024

Materials

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The earth pressure acting on soilbag-reinforced retaining structures subjected to surcharge loads under non-limited states is crucial for designing these structures. In this study, mode tests on soilbag-reinforced retaining walls were conducted to the earth pressure of the wall subjected to surcharge loads. The findings from these tests reveal a non-linear distribution of lateral earth pressure on the wall when subjected to surcharge loads in non-limited states, with an observed escalation in pressure corresponding to increased surcharge loads. Insights from the tests facilitated the development of a predictive method for estimating lateral pressure on soilbag-reinforced retaining walls under similar conditions, and its performance was fully validated by the model tests. Furthermore, the impact of the geometric dimensions and material properties of the soilbags on the earth pressure distribution was examined using the proposed method.

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Section: Introductionmentioning

confidence: 99%

Study on Non-Limited Earth Pressures of Soilbag-Reinforced Retaining Structures with Surcharge Loads

Bian,

Lai,

Liu

et al. 2024

Materials

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“…Load tests [11][12][13] and FEM [14][15][16] are frequently adopted to analyze the bearing characteristics and settlement mechanisms of PCFs or pile groups in practical engineering. However, the field load test often has difficulty obtaining the ultimate loading for large pile groups or PCFs.…”

Section: Introductionmentioning

confidence: 99%

The Vertical Behaviors of Dissimilar Pile Composite Foundations over Inclined Bedrock

Zhou,

Tan,

Yue

et al. 2024

Buildings

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Pile composite foundations (PCFs) have been commonly applied in reinforcement engineering to adjust the vertical stiffness of foundations, due to the displacement control design criteria for foundations. PCFs that have dissimilar pile lengths, located over inclined bedrock, have shown significantly different vertical behaviors from PCFs with equal pile lengths, placed over a semi-infinite medium. However, the vertical behaviors of dissimilar PCFs over inclined bedrock cannot be predicted with the current theoretical methods, although they have been widely adopted in engineering. An analytical method is proposed in this investigation to analyze the vertical bearing characteristics of dissimilar PCFs over inclined bedrock. A pile–soil system is decomposed into fictitious piles and extended soil, and then a control equation to determine the axial force along the fictitious piles is established, stemming from the compatibility conditions between them. The vertical behaviors of dissimilar PCFs can be obtained by solving the control equation with iterative procedures, and the equation is verified by two field load tests of single piles from the Honghe bridge and a numerical case. Then, the settlement and load transfer behaviors of 3 × 1 dissimilar PCFs and their influence factors are analyzed, and the results are as follows. (1) Obvious differences can be observed concerning the axial force distribution, settlement w, and load-sharing ratio (LSR) of each pile element for different pile–soil stiffness ratios (Ep/Es). (2) The LSR of pile 1 increases from 0.074 to 0.253 for the rigid pile and from 0.062 to 0.161 for the flexible pile condition when the cushion stiffness Kc changes from 1 × 104 kN/m to 3 × 108 kN/m. The non-dimensional vertical stiffness of the foundation, N0/wdEs, increases from 10.21 to 28.95 for the rigid pile condition and increases from 8.69 to 14.44 for the flexible pile condition, when Kc increases from 1 × 104 kN/m to 4 × 105 kN/m. (3) The neutral layer depth of the pile zn, the average settlement w, and the differential settlement wd of each element head decrease with Kc, and no negative friction zone exists (zn = 0 m) for all the pile elements when Kc> 2 × 105 kN/m. (4) The N0/wdEs decreases with the distance between the pile bottom and the inclined bedrock Δ. For the rigid and flexible pile conditions, the N0/wdEs is 22.16 and 13.48 for Δ = 1 m, and 13.13 and 10.10 for Δ = 8 m. The wd reaches 16.7 mm and 4.0 mm for Δ = 1 m and Δ = 8 m, respectively. (5) The N0/wdEs increases almost linearly with an increase in l/d for the rigid pile condition, and it gradually decreases for the flexible pile condition. The developed model can improve the design and analysis of PCFs located over inclined bedrock under vertical loading.

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Kinematic Internal Forces of Free-Head Single Piles Subjected to Seismic Loading: Shaking Table Testing and Numerical Simulation

Aghamolaei,

Azizkandi,

Abolhasanpoor

2023

Int J Civ Eng

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In-situ horizontal cyclic loading tests on composite foundation composed of soilbags and piles

Cited by 7 publications

References 12 publications

Study on Non-Limited Earth Pressures of Soilbag-Reinforced Retaining Structures with Surcharge Loads

Study on Non-Limited Earth Pressures of Soilbag-Reinforced Retaining Structures with Surcharge Loads

The Vertical Behaviors of Dissimilar Pile Composite Foundations over Inclined Bedrock

Kinematic Internal Forces of Free-Head Single Piles Subjected to Seismic Loading: Shaking Table Testing and Numerical Simulation

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