Physical Model Tests of Half-Scale Geosynthetic Reinforced Soil Bridge Abutments. I: Static Loading

Zheng, Yewei; McCartney, John S.; Shing, P. Benson; Fox, Patrick J.

doi:10.1061/(asce)gt.1943-5606.0002152

Cited by 20 publications

(3 citation statements)

References 38 publications

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“…A well-graded (SW) sand, previously characterized by Zheng et al (2019), was used for the soilcement columns after it was observed that preliminary soil-cement columns formed from uniform Ottawa F-65 sand tended to segregate easily and exhibited low compressive strength. A water:binder (w:b) ratio of 2.5 was selected to target an unconfined compressive strength of approximately 1725 kPa (250 psi), following the trendline for a variety of lab-mixed soil-cement columns in Figure 29 of the FHWA Deep Mixing Design Manual.…”

Section: Soil-cement Column MIX Designmentioning

confidence: 99%

Dynamic Performance of Model Rocking Footings on Sand Reinforced by Soil-Cement Columns

2023

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This study focuses on the load-deformation response of a heavily loaded rocking footing on sand reinforced by soil-cement columns via centrifuge-model scale shake table tests. In a previous study involving the same footing on unimproved ground, the footing exhibited overturning failure and excessive settlement. To mitigate this, the present study aims to control the kinematics of the footing via strategic ground improvement while maintaining the enhanced energy dissipation characteristic of a rocking footing. The ground improvement technique consists of soil-cement mixed columns which were cast externally and then placed in the model sand layer during pluviation. Shake sequences are applied to both determine the frequency response of the soil-structure system as well as to induce controlled yielding in the improved soil. The addition of paired soil-cement columns at the ends of the footing was found to significantly reduce settlement during rocking and preserve re-centering throughout demanding shaking events.

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Section: Soil-cement Column MIX Designmentioning

confidence: 99%

Dynamic Performance of Model Rocking Footings on Sand Reinforced by Soil-Cement Columns

2023

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“…It is crucial, for example, when they are used as elements of infrastructure in road engineering. The performance of such structures as geosynthetic reinforced soil (GRS) bridge abutments under service loads and working stress has been reported as satisfactory from engineering point of view [41][42][43][44][45][46][47][48][49]. That is why the problem of deformation in such structures needs further investigation.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Testing and Theoretical Modeling of Deformations of Reinforced Soil Wall

Kazimierowicz-Frankowska¹,

Kulczykowski²

2022

Applied Sciences

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This paper presents the results of an experimental investigation of a vertical reinforced soil (RS) wall. The structure was built on a laboratory scale. Horizontal displacements on the surface of the model wall were monitored at the end of construction and during surcharge application (as post-construction displacements). The experimental results were compared with their theoretical predictions. The accuracy of the selected analytical approach was examined to predict deformations of the RS structure under external loading. It was shown that the proposed original and relatively simple analytical method for estimating structural deformation can be successfully used in practice (the average difference between the recorded and calculated values of deformation did not exceed 25%). From a scientific point of view, an important element of this work was the analysis of the effect of friction between the backfill and the side walls of the test box on the measured displacements. For the investigated case, it was shown that the impact of this element caused a reduction in the value of external loading of more than 60%. The final results may be particularly useful in the design process of structures used in transportation engineering (bridge abutments), where deformation limit values cannot be exceeded.

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“…The measurement of the structural response, namely the natural frequency, vibration mode and damping factor, reflects the true structural state of the bridge [10][11][12]. The static load test can be used to measure the strain and deflection generated under load, and then compared with the theoretical value to obtain the technical status such as the bridge's true bearing capacity [13,14]. In this paper, taking Yanxi Bridge as an example, the dynamic and static load test was first conducted.…”

Section: Introductionmentioning

confidence: 99%

Analysis for Dynamic and Static Load Test of Prestressed Concrete Simply Supported Bridge

Qian¹

2020

EESRJ

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Considering a great number of newly built bridges at home and abroad, this paper aims to study how to effectively check the technical status such as construction quality, and bearing capacity etc. of the prestressed concrete simply supported bridges using the dynamic and static load tests. First, the finite element calculation was conducted to simulate various construction conditions of the bridge and calculate the actual bridge's bearing capacity. Then, taking Yanxi Bridge as an example, the authors carried out dynamic and static load tests and finite element theoretical calculations to analyze the deflection and strain of the bridge structure during the static load test, as well as the frequency, damping and patterns obtained from the dynamic load test. As a result, the bridge quality was reasonably evaluated. The analysis results show that the bearing capacity and structural rigidity of the bridge meet the design requirements. The research findings shall provide references for the completion acceptance of other bridges.

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Physical Model Tests of Half-Scale Geosynthetic Reinforced Soil Bridge Abutments. I: Static Loading

Cited by 20 publications

References 38 publications

Dynamic Performance of Model Rocking Footings on Sand Reinforced by Soil-Cement Columns

Dynamic Performance of Model Rocking Footings on Sand Reinforced by Soil-Cement Columns

Laboratory Testing and Theoretical Modeling of Deformations of Reinforced Soil Wall

Analysis for Dynamic and Static Load Test of Prestressed Concrete Simply Supported Bridge

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