Structural condition assessment and fatigue stress analysis of cement concrete pavement based on the GPR and FWD

Zhao, Weitian; Yang, Qun; Wu, Wenliang; Liu, Jiajun

doi:10.1016/j.conbuildmat.2022.127044

Cited by 13 publications

(2 citation statements)

References 35 publications

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“…Indoor testing includes static triaxial testing (Salamatpoor and Salamatpoor, 2014) and dynamic triaxial testing (Kaya et al, 2021). Outdoor testing includes bearing plate testing, Beckman beam testing (Ueshita et al, 1973), field testing of CBR value (Mendoza and Caicedo, 2019), Rayleigh wave testing (Cao-Rial et al, 2020), falling weight deflectometer testing (Zhao et al, 2022) (FWD), and portable falling weight deflectometer testing (George and Kumar, 2020) (PFWD). The first three work by applying static load, and the last three work by using dynamic load.…”

Section: Introductionmentioning

confidence: 99%

A flexible bearing plate based on steel plate and rubber mat

2023

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The bearing plates used in plate load test for highway engineering are typically rigid. However, due to limitations in obtaining the accurate distribution of compressive stress at the bottom of the bearing plate, there is often a significant deviation between the measured subgrade resilient modulus and the actual condition. To address this issue, a flexible bearing plate can be used to test the subgrade and obtain a more accurate resilient modulus. In this study, we use variance and degree of mean deviation to quantitatively evaluate the distribution uniformity of compressive stress. To create a rigid-flexible bearing plate that is similar to a flexible bearing plate, we explore the combinatorial design of steel plates and rubber mats. We examine factors such as the thickness (10, 20, and 30 mm) of the steel plate, elastic modulus (5, 10, and 20 MPa) and thickness (10, 20, and 30 mm) of the rubber mat, friction coefficient (μ:0, 0,2, 0.4, 0.6, 0.8, ∞) between the bearing plate and subgrade, and the combined shape characteristics of the rubber mat and steel plate. To reduce friction between the rubber mat and subgrade, we use lubricant, and through our design process, we develop a flexible bearing plate with relatively uniform compressive stress. Our computations show that when μ = 0.05, the variance is 0.0001, and the degree of mean deviation is 0.0780. These results indicate that the distribution uniformity of the compressive stress is very close to the uniform distribution load, which meets the necessary accuracy requirements for engineering applications.

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Section: Introductionmentioning

confidence: 99%

A flexible bearing plate based on steel plate and rubber mat

2023

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“…Evaluations of pavement performance can be broadly divided into two tasks: (a) the assessment of the conditions of pavement structures and (b) investigation of the quality of the subgrade. Assessing conditions of pavement structure often involves the identification of distresses through visual surveys, determination of slab performance through deflection testing [9][10][11][12][13][14][15][16][17][18][19][20], and checking the quality of concrete via coring [21][22][23][24][25]. Smith et al [26] conducted a comprehensive investigation into the utilization of falling weight deflectometer (FWD) data for mechanistic-empirical pavement design and rehabilitation procedures, establishing the efficacy of FWD tests in pavement evaluation and rehabilitation.…”

Section: Introductionmentioning

confidence: 99%

A Case Study on Distresses of Concrete Pavements Supported on a Retaining Wall

Lee,

Koirala,

Choi

et al. 2023

Applied Sciences

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Embankments and retaining walls are integral parts of the bridge system and provide a smooth transition from lower elevations (i.e., roadways) to higher elevations (i.e., bridge decks). Performances of pavement structures supported on embankments or retaining walls are directly related to their conditions. This paper presents a comprehensive case study of the evaluation of pavement structures supported on an in-service mechanically stabilized earth (MSE) wall that showed significant distresses, such as lane separation, faulting, lane settlement, and tilting of the MSE wall. The conditions of the pavement structures were evaluated via visual observations, falling weight deflectometer (FWD) tests, and coring through pavement structures. The conditions of the MSE wall were evaluated through dynamic cone penetrometer (DCP) tests, cone penetration tests (CPTs), LiDAR surveys, and soil borings. Detailed analysis of the data obtained in this study provides valuable insights into potential distress mechanisms.

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