In Situ Monitoring of the Long-Term Settlement of High-Fill Subgrade

Jia, Liang; Guo, Jianchun; Yao, Kai

doi:10.1155/2018/1347547

Cited by 10 publications

(4 citation statements)

References 16 publications

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“…Almost two-year settlement data are obtained from the embankment after construction. And the fieldmeasurement settlement data during construction is obtained from [28], which monitored the settlement of each layer of the filling during the construction, and the relationship between filling height and settlement of the filling during construction is represented in Figure 6. And from the monitored data during construction in Figure 6, firstly, the value of T r is obtained from equation 57, secondly, substituting the value of T r and all the monitored parameters into equation 58to calculate the value of R, thirdly, the values of T r and R are substituted into equation (59) to get the value of E H , and finally, the creep settlement of every layer of the embankment is calculated from equations (42) and (55), respectively, which are presented in Figures 7 and 8.…”

Section: Practical Verificationmentioning

confidence: 99%

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Application of a Viscoelastic Model to Creep Settlement of High‐Fill Embankments

Jia

Huang

2019

Advances in Civil Engineering

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In order to predict the creep settlement of high-fill embankments, the time-dependent viscoelastic model of Poynting–Thomson (the standard linear solid) has been chosen to represent the creep behavior of soils. In the present study, the hereditary integral was applied to calculate the strain while the load increase is varied with time. Calculation expressions of the creep settlement of an embankment during and after construction were obtained under one-dimensional compression conditions. Using this approach, the three parameters of every layer can be determined and adjusted to accommodate in situ monitoring data. The calculated results agreed well with those from the field, which imply that the method proposed in this paper can give a precise prediction of creep settlement of high-fill embankments.

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Section: Practical Verificationmentioning

confidence: 99%

“…Physical and mechanical parameters of subsoil (reproduced from Jia et al[28] (under the Creative Commons Attribution License/ public domain)).…”

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confidence: 99%

Application of a Viscoelastic Model to Creep Settlement of High‐Fill Embankments

Jia

Huang

2019

Advances in Civil Engineering

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“…Improper treatment of high-fill subgrades will have a large impact on the road quality and driving comfort and may lead to engineering problems [1][2][3]. Therefore, monitoring subgrade engineering, through multiple means, is of the utmost importance for the ensured stability of these high-fill subgrades [4]. However, there is no unified standard method for safety risk assessment of high-fill subgrade, and different evaluation methods yield different conclusions, resulting in an unscientific classification of engineering risk levels.…”

Section: Introductionmentioning

confidence: 99%

Construction Risk Assessment of High-Fill Subgrade Using Combination Weighting Method Based on Game Theory

Li,

He,

Peng

2023

Preprint

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The construction safety risks (such as landslides or slumps) of the high-fill subgrade are characterized by uncertainty and variability. In order to ensure the construction safety of the high-fill subgrade of the expressway, a comprehensive risk assessment model of high-fill subgrade construction according to the combination weighting method based on game theory was established. Firstly, settlement rate, lateral differential settlement, horizontal displacement at the foot of the slope, deep horizontal displacement, and excess pore pressure were selected as evaluation indicators, and an evaluation index system of high-fill subgrade was constructed. Secondly, the subjective and objective weights were obtained via the analytic hierarchy process and entropy method. Furthermore, the optimized weights were obtained by introducing game theory, and the construction risk of the high-fill subgrade was evaluated and analyzed using the fuzzy comprehensive evaluation method. Finally, based on the high-fill section of the Zhijiang-Tongren Expressway in Hunan Province (China), the evaluation model was validated through field measurement data. The results show that the safety scores obtained using the three methods of analytic hierarchy process, entropy method, and combination weighting method based on game theory are similar. The combination weighting evaluation model can correct the evaluation result error caused by a single weight and avoid information delay caused by the manual processing and analysis of monitoring data. The high-fill subgrade safety evaluation grade based on the combination weighting method and game theory is consistent with the engineering situation, and its fault tolerance range is within 20%. The evaluation model proposed in this study can scientifically and effectively evaluate the safety risks of high-fill subgrade construction, significantly improving the safety and reliability during the construction process.

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“…Based on the typical geological parameters of the Nanjing metrostation excavation, Li and Yan [8] numerically simulated ground surface settlements in auxiliary planes perpendicular and parallel to the excavation and in angled auxiliary planes at the excavation corner and nally developed an estimation method for building settlements. Jia et al [9] investigated the postconstruction settlement of high-ll subgrade under gravity stress and vehicle loads and monitored the Lanzhou-Yongjing highway in situ. ey analyzed the evolution of settlement with time and space, and the results show that the settlement of road shoulder is greater than that of driveway; the settlement of subgrade increases with time and tends to be stable after one year.…”

Section: Introductionmentioning

confidence: 99%

Influences of Urban Viaduct Pier Caps on Uneven Settlement of Roadbed

Zheng

2019

Advances in Civil Engineering

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Uneven settlement widely occurs on the roadbed under urban viaducts in operation. Previous studies focused on the effect of soft soil foundation on the uneven settlement of roadbed, without considering the phenomenon and mechanism of uneven settlement at the junction of pier cap and the roadbed under viaduct. The interaction is now considered between the buried depth of cap, the relative stiffness between cap and road subgrade, and the uneven settlement of roadbed. Using the Midas GTS NX software, a numerical analysis model of the deformation of roadbed under viaduct is constructed to study the influence of viaduct cap foundation on the uneven settlement of roadbed under viaduct. The simulated results of uneven settlement of roadbed caused by urban viaduct pier cap show that (1) when the buried depth of cap exceeds 2.35 m, with the increase of buried depth, the fall of roadbed settlement tends to decrease, but the decreased amount is not significant. Considering the factors such as construction cost and complications of construction technology, it is suggested that the best buried depth of cap is about 2.5 m. (2) The fall of roadbed settlement decreases with the decrease of relative stiffness between cap and roadbed. When the relative stiffness exceeds 6.3, the decreasing trend of settlement fall is not significant. The concrete roadbed should have more stiffness in order to reduce the settlement.

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In Situ Monitoring of the Long-Term Settlement of High-Fill Subgrade

Cited by 10 publications

References 16 publications

Application of a Viscoelastic Model to Creep Settlement of High‐Fill Embankments

Application of a Viscoelastic Model to Creep Settlement of High‐Fill Embankments

Construction Risk Assessment of High-Fill Subgrade Using Combination Weighting Method Based on Game Theory

Influences of Urban Viaduct Pier Caps on Uneven Settlement of Roadbed

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