Surface Settlement Induced by Subway Tunnel Construction Based on Modified Peck Formula

Zhang, Qianjin; Wu, Ke; Cui, Shuaishuai; Yang, Yu; Zhang, Zheng; Zhao, Jun

doi:10.1007/s10706-018-00798-6

Cited by 24 publications

(10 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A bunch of in situ monitoring data of Zizhi Tunnel is calculated and analyzed, indicating that a simple normal distribution curve of Peck is not accurate enough to simulate the settlement of the tunnel under the influence of groundwater (see Figure 2). e monitoring data shows that the shape of surface settlement is like "W," which is different from the "V" shape of Peck and other simulations reported by Fang et al [9] and Zhang et al [4]. Compared to the curve shape, the key monitoring points in the red circle in Figure 2 are not well fitted.…”

Section: Limitation Of the Peck Formulamentioning

confidence: 58%

“…Liu and Hou [3] modified the Peck formula by considering the effect of pore pressure dissipation and tunnel depth. Many attentions have been paid to various influencing factors of surface settlement, e.g., space and time [4], the shape and depth of the tunnel [5][6][7][8], soil types and construction operation [9][10][11][12][13], reinforcement [14], and consolidation settlements [15,16]. e prediction models in these studies greatly improve our understanding of tunnel settlement in different soils, whereas the utility of them cannot be extended to the tunnels in complex geological conditions, primarily owing to the ignorance of groundwater flow.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil

Tang

Liang

Liu

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

Accurate prediction of surface settlement induced by tunnel excavation is significant for preventing damage to existing structures under complex geological conditions. The Peck formula is currently considered as an efficient solution for surface settlement prediction. This paper proposes a modified Peck formula considering geological conditions to improve the accuracy of surface settlement prediction of twin tunnels. The asynchronization of the sinking rate and stability of the vault settlement and surface settlement within the river-affected area may attribute to the groundwater drawdown caused by cofferdam construction on the river. A modified Peck formula is put forward with soil permeability and width-controlling parameters involved. There is a small settlement at the center of the twin tunnels, making the settlement trough upward buckling, which is like a “W” shape. This situation can be accurately predicted by the modified formula with a significantly increased adjusted R-square. The modified formula can accurately predict the surface settlement of tunnels excavated in low permeability soil layers with a permeability coefficient between 10−4 cm/s and 10−7 cm/s, especially in the groundwater drawdown environment. The reliability of the modified Peck formula is verified by other cases in Nanjing and Singapore.

show abstract

Section: Limitation Of the Peck Formulamentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil

Tang

Liang

Liu

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…Since the shield construction process faces a variety of geological conditions and working conditions, in order to make the Peck formula better adapted to the influence of various complex geological conditions and working conditions, Hu et al [5] studied the law of land subsidence induced by shield tunneling in the water-rich stratum. Zhang et al [6] studied the influence of time and depth on land subsidence, and deduced formulae to predict the three-dimensional space-time subsidence of double-track tunnels during construction. Hence, the calculation method of ground settlement of single-and double-track tunnels was obtained.…”

Section: Introductionmentioning

confidence: 99%

Modification of Peck Formula to Predict Surface Settlement of Tunnel Construction in Water-Rich Sandy Cobble Strata and Its Program Implementation

et al. 2022

View full text Add to dashboard Cite

There are few studies on the land subsidence induced by shield tunneling in the water-rich sandy gravel stratum, which is of high research value. Linear regression and measured data were employed in this study to investigate the land subsidence induced by shield tunneling when crossing the water-rich sandy gravel stratum from Mudan Dadao Station to Longmen Dadao station of Luoyang Metro Line 2. The maximum land subsidence correction coefficient, α, and the settlement trough width correction coefficient, β, were introduced to modify the peck formula to predict land subsidence induced by shield tunneling in Luoyang’s water-rich sandy gravel stratum. It was discovered that the original Peck formula needs to be modified because its prediction result was significantly larger than the actual value. When the value ranges of α and β in the modified Peck formula were 0.379~0.690 and 0.455~0.508, respectively, the modified Peck formula presented a minor error, in terms of the prediction curve, compared with the original formula, and the prediction result was more reliable. The best prediction result could be obtained when α = 0.535 and β = 0.482. In addition, Python could effectively improve the calculation efficiency of the Peck formula modification.

show abstract

“…Nowadays, with rapid economic development and urban expansion, the construction of subway tunnels has gradually become the most economical and effective method to relieve traffic congestion caused by urbanization progresses. Subway tunnels often cross densely populated areas, where many buildings exist [1]; thus, a common problem is the existence of metro lines in the vicinity of planned foundation pits. Foundation pit excavation is an unloading process that destroys the initial stress state of the surrounding soil and results in the deformation of nearby retaining structures and soil, potentially causing retaining wall lean, uplift at the bottom of a pit, and the settlement of the soil behind the wall.…”

Section: Introductionmentioning

confidence: 99%

Deformation Response Research of the Existing Subway Tunnel Impacted by Adjacent Foundation Pit Excavation

Dong

Mei

Yang

et al. 2021

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

The excavation of foundation pits is one of the most important factors causing changes to the initial stress state of its surrounding soil, thus affecting the safety of nearby existing subway tunnels. In order to study the deformation in metro lines induced by adjacent foundation pit excavation, a three-dimensional model based on an actual engineering case was established, and the deformation regulations of the retaining wall, surrounding soil, and tunnels were investigated, which also validated the model’s feasibility. Additionally, the deformation and strain response of the subway tunnel under different selection parameters of the enclosing structure and soil were studied. The results showed that, after the foundation pit excavation, the soil inside the pit underwent an uplift, the surrounding soil outside of the pit showed vertical settlement, and the retaining wall created a deformation towards the interior of the pit. Mechanical parameters of plate elements have a small influence on the deformation of metro lines. Axial strain and maximum displacement of the subway tunnel increase with the increase in the soil’s Poisson’s ratio, and on the contrary, they decrease with the increase in the m-value and G 0 , ref . The maximum responses of the subway tunnel came from changes to G 0 , ref and υ . These analysis results can be used for the safety evaluation of subway tunnel operation, design, and construction in other similar engineering settings.

show abstract

Surface Settlement Induced by Subway Tunnel Construction Based on Modified Peck Formula

Cited by 24 publications

References 1 publication

Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil

Modification of Peck Formula to Predict Ground Surface Settlement of Twin Tunnels in Low Permeability Soil

Modification of Peck Formula to Predict Surface Settlement of Tunnel Construction in Water-Rich Sandy Cobble Strata and Its Program Implementation

Deformation Response Research of the Existing Subway Tunnel Impacted by Adjacent Foundation Pit Excavation

Contact Info

Product

Resources

About