Experimental and simplified model study of the development of ground settlement under hazards induced by loss of groundwater and sand

Zheng, Gang; Dai, Xuezhi; Diao, Yu; Zeng, Chao-Feng

doi:10.1007/s11069-016-2275-3

Cited by 43 publications

(17 citation statements)

References 24 publications

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“…Similarly, owing to the influence of frozen soil at surface, the settlement of the soil near the surface appears S-shaped. Because the residents around the monitoring section have the habit of pumping groundwater, the descent of groundwater will cause internal settlement [6,39,40]. Table 7 lists the sum of squares of errors of different models.…”

Section: Appl Sci 2018 8 X For Peer Review 17 Of 23mentioning

confidence: 99%

Settlement Prediction and Differential Settlement Criterion for Heightening and Thickening Levee

Lan

Wang

2018

Applied Sciences

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Owing to the pavement cracking of heightening and thickening levees (HTL) caused by differential settlement, it is necessary to study the settlement prediction and differential settlement criterion for HTLs. In this study, an HTL was taken as the study object. First, leveling observation and layered settlement observation were adopted, and a generalized settlement prediction model (GSPM) that can describe both S-shaped and hyperbolic settlement–time curves was proposed. The physical meanings of GSPM parameters were analyzed. Moreover, the effectiveness of the GSPM was verified using field monitoring data. Second, finite element analysis based on a viscoelastic constitutive model was used to reveal the quantitative relationship between the differential settlement and horizontal stress of the pavement. On this basis, the differential settlement criterion was obtained. The results showed that the GSPM can unify the logistic model and hyperbolic model by introducing two morphological change parameters. In addition, the GSPM can be more widely used, more accurate, and more stable than the traditional logistic model and hyperbolic model. When an asphalt concrete pavement (whose ultimate tensile stress is 0.12 MPa) is used, the corresponding differential settlement criterion is approximately 4.3 cm. The research results can provide a reference for reasonable differential settlement control for HTLs in order to prevent pavement cracking.

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Section: Appl Sci 2018 8 X For Peer Review 17 Of 23mentioning

confidence: 99%

Settlement Prediction and Differential Settlement Criterion for Heightening and Thickening Levee

Lan

Wang

2018

Applied Sciences

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“…How to control groundwater level effectively during excavation has become a research hotspot (Cong et al, 2009;Wang et al, 2010;You et al, 2017;Cui, 2017;Estanislao et al, 2017;Zhang et al, 2019;Li et al, 2021). The improper control of groundwater in excavation and construction processes often leads to large ground deformation (Caldhead et al, 2011;Xu et al, 2012;Pujes et al, 2017), damage to surrounding buildings (Song et al, 2014;Tan et al, 2018), quicksand and gushing (Zheng et al, 2016;Wu et al, 2018Wu et al, , 2019, and other engineering hazards. Field monitoring has indicated that the pumping and depressurization of confined water are the main factors causing ground settlement in foundation pit engineering (Chen et al, 2009;Ye et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…The majority of the accidents in foundation pit are concerned with groundwater. How to control groundwater level effectively during excavation has become a research hotspot (Cong et (Zheng et al, 2016;Wu et al, 2018Wu et al, , 2019, and other engineering hazards. Field monitoring has indicated that the pumping and depressurization of confined water are the main factors causing ground settlement in foundation pit engineering (Chen et al, 2009;Ye et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Foundation Pit Dewatering Using Horizontal Seepage Reducing Body

Wang¹,

Long²,

Zhao³

et al. 2021

Preprint

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Groundwater level has to be lowered during deep excavation. A vertical curtain is usually adopted to control the drawdown both inside and outside a foundation pit in a built-up area. However, the cost and working difficulty increases substantially with the increasing depth of vertical curtains. In the manuscript, a kind of man-made horizontal seepage reducing body (HSRB) was introduced to shorten the vertical curtain depth and control drawdown. With the No. 4 shaft foundation pit of Guangyuan Project, Shanghai as background, HSRB was proposed in foundation pit dewatering. Microbially induced carbonate precipitation grouting technology was recommended to form an environment-friendly HSRB. Numerical method was used to simulate and understand the influence of position, thickness, and hydraulic conductivity of HSRB on groundwater level. The non-separated HSRB was better than the separate HSRB. Decreasing HSRB hydraulic conductivity was better than increasing HSRB depth. Four seepage modes are summarized considering vertical curtain penetration conditions into multi-aquifer, and the fifth seepage mode was formed for vertical curtain using man-made HSRB, which can be referred by similar engineering.

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“…groundwater pumping, oil and gas extraction) or surface loadings is a very common phenomenon. Whether it is fluid pumping or surface loadings, the consolidation is actually induced by the increase of the effective stress (Booker and Carter, 1986a, 1986b, 1987Tarn and Lu, 1991;Zhang et al, 2015;Guo et al, 2015;Zheng et al, 2016;Li et al, 2017a;Zeng et al, 2018Zeng et al, , 2019Zheng et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Semi-analytical solution to one-dimensional consolidation of viscoelastic saturated soils subject to an inner point sink

2020

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Purpose The purpose of this paper is to present a semi-analytical solution to one-dimensional (1D) consolidation induced by a constant inner point sink in viscoelastic saturated soils. Design/methodology/approach Based on the Kelvin–Voigt constitutive law and 1D consolidation equation of saturated soils subject to an inner sink, the analytical solutions of the effective stress, the pore pressure and the surface settlement in Laplace domain were derived by using Laplace transform. Then, the semi-analytical solutions of the pore pressure and the surface settlement in physical domain were obtained by implementing Laplace numerical inversion via Crump method. Findings As for the case of linear elasticity, it is shown that the simplified form of the presented solution in this study is the same as the available analytical solution in the literature. This to some degree depicts that the proposed solution in this paper is reliable. Finally, parameter studies were conducted to investigate the effects of the relevant parameters on the consolidation settlement of saturated soils. The presented solution and method are of great benefit to provide deep insights into the 1D consolidation behavior of viscoelastic saturated soils. Originality/value The presented solution and method are of great benefit to provide deep insights into the 1D consolidation behavior of viscoelastic saturated soils. Consolidation behavior of viscoelastic saturated soils could be reasonably predicted by using the proposed solution with considering variations of both flux and depth because of inner point sink.

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Experimental and simplified model study of the development of ground settlement under hazards induced by loss of groundwater and sand

Cited by 43 publications

References 24 publications

Settlement Prediction and Differential Settlement Criterion for Heightening and Thickening Levee

Settlement Prediction and Differential Settlement Criterion for Heightening and Thickening Levee

Numerical Simulation of Foundation Pit Dewatering Using Horizontal Seepage Reducing Body

Semi-analytical solution to one-dimensional consolidation of viscoelastic saturated soils subject to an inner point sink

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