Influence of cement-fly ash-gravel pile-supported approach embankment on abutment piles in soft ground

Dong, Xiaopeng; Jiang, Guanlu; Liao, Dasong; Hu, Yunpeng; Liu, Xianfeng

doi:10.1016/j.jrmge.2018.06.001

Cited by 23 publications

(8 citation statements)

References 9 publications

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“…Modeling is another means of studying the feasibility of modified soft rock as subgrade material [27]. D. Xiao investigated the influence of cement-fly ash-gravel pile-supported approach embankments on abutment piles in soft ground [28]. Zheng et al (2013) performed a numerical analysis to study the mechanical properties of soft soil beneath approach embankments [29].…”

Section: Additives Reference Findingsmentioning

confidence: 99%

Applicability Study on Modified Argillaceous Slate as Subgrade Filling for High-Speed Railway

Guo

Wei

2022

Applied Sciences

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Modifying weathered argillaceous slate (WAS) to fill the subgrades of high-speed railways not only leads to obvious environmental benefits but also significantly saves natural resources. Previous studies have used several additives together with cement/quicklime. Using cement/quicklime as an additive would also improve the strength of weathered soft rock. Therefore, cement/quicklime can be used effectively as a sustainable solution. To illustrate the feasibility of cement/quicklime in WAS improvement, the mineral components and physical, mechanical and hydraulic characters for cement/quicklime-modified WAS were investigated via laboratory test. The dynamic behaviors were then analyzed by establishing a 3D vertical coupling dynamic model and performing dynamic triaxial tests. After mixing cement/quicklime, the following was proved: (1) The particles were coarsened, the content of kaolinite and amorphous phase increased, and the content of muscovite decreased, resulting in weakened hydrophilicity, reduced plasticity and enhanced water stability; (2) Mechanical and deformation characters were enhanced, reflecting an unconfined compression strength of quicklime/cement-modified soil greater than 0.5 MPa and elastic deformation for the subgrade of less than 0.1 mm; (3) For the quicklime-modified WAS, the dynamic strength was below the allowable value, and the sample disintegrated in water in 2 min, indicating it to be unsuitable for subgrade filling in HSR; (4) For cement-modified WAS, the water stability and dynamic strength were improved greatly, as well as the static strength. The sum of results highlights that 5% cement-modified WAS is recommended for filling subgrades of HSR for comprehensive factors.

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Section: Additives Reference Findingsmentioning

confidence: 99%

Applicability Study on Modified Argillaceous Slate as Subgrade Filling for High-Speed Railway

Guo

Wei

2022

Applied Sciences

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“…Its generation is significantly greater than its utilization. In fact, researchers have attempted to use fly ash from industries to reduce cement input [ 7 , 8 , 9 , 10 ]. Fly ash is generally composed of silica, alumina, and ferric oxides.…”

Section: Introductionmentioning

confidence: 99%

The Liquid Limit as a Factor in Assessing the Improvement of Stabilized Cement-Based Highwater Content Clayey Sediments

et al. 2022

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The purpose of this study was to assess the performance of high water content clayey sediments at different liquid limits as the clays are treated with cement-based solidifying materials. Three clay samples are obtained from different locations in the Kumamoto Reservoir. Two types of cement-based solidifying agents, namely, ordinary Portland cement and a cement–fly ash binder, were used. Using the initial water content of clay and the mixing amount of the solidifying agent as experimental variables, a cone penetration test was performed on the solidifying agent-stabilized clays to obtain the cone index (qc). The results showed that when the water content to cementitious content ratio (w/AW) was used as a parameter for evaluating the improvement of solidifying agent-stabilized clay, different forms of improvements were observed when different water and solidifying agent contents were used. This implied that the parameter w/AW was not suitable for evaluating the improvement of such clay. A new parameter, K, representing the content of solidifying agent, was introduced to account for the water content. For all sampled clays, the correlation coefficients for the K–ln qc relationship exceeded 0.9. Considering the effect of the liquid limit of the samples, the modified content of the solidifying agent (KL) was introduced to evaluate the cone index of the stabilized soils. It was discovered that the proposed equation unified the assessment of the improvement of the three samples of Kumamoto clayey sediments owing to the new parameter, KL.

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“…The differential settlement will affect the internal forces on structures [4]. The soil movements may, in turn, induce additional stresses and displacement in neighboring abutments piles [5].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Pile Behavior Toward Abutment Construction using PLAXIS 3D: Case Study on Lembak Bridge

Girsang

Rahardjo

Lim

2021

UKaRsT

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Soil as a subgrade foundation under embankment construction often creates problems in terms of stability and settlement. Therefore, it needs improvement by using preloading embankment. This article presents the investigation of pile behavior towards two scenarios of abutment construction using Plaxis 3D, a three- dimensional finite element program. The use of two scenarios of analysis was Method A. The abutment construction phase conduct without using a preloading embankment, and Method B, where a preloading embankment constructs before the abutment construction. The case study location at the Lembak bridge. Compare the analysis results with the measured data. Results showed that Method A and Method B's pile deflection yielded four times and one point six times larger than the measure data, respectively. Hence, it indicates that Method B recommends for future construction of bridge abutment.

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Influence of cement-fly ash-gravel pile-supported approach embankment on abutment piles in soft ground

Cited by 23 publications

References 9 publications

Applicability Study on Modified Argillaceous Slate as Subgrade Filling for High-Speed Railway

Applicability Study on Modified Argillaceous Slate as Subgrade Filling for High-Speed Railway

The Liquid Limit as a Factor in Assessing the Improvement of Stabilized Cement-Based Highwater Content Clayey Sediments

Investigation of Pile Behavior Toward Abutment Construction using PLAXIS 3D: Case Study on Lembak Bridge

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