Numerical investigation of tunnel deformation due to adjacent loaded pile and pile-soil-tunnel interaction

Lueprasert, Prateep; Jongpradist, Pornkasem; Suwansawat, Suchatvee

doi:10.1016/j.tust.2017.08.006

Cited by 77 publications

(34 citation statements)

References 31 publications

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“…The simulation processes were divided into two steps. The first step, the tunnelling with shield method was simulated by following [9]. The second step, the impact of pile row on the tunnel deformation was simulated.…”

Section: Numerical Model and Feamentioning

confidence: 99%

“…Examples are the effect of nearby loaded bore pile on existing tunnel in London [1][2], the effect of multi-storey commercial building on two existing tunnels of Toronto subway in Canada [3]. In addition, the effect on existing tunnel due to adjacent bore pile under loading was analyzed by 3D finite element method (FEM) in Bangkok, Thailand [4][5][6]. Many researches focused on the effect on existing tunnel due to adjacent single pile under loading to study the response of tunnel.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on pile-soil-tunnel interaction due to adjacent loaded pile row by 3D FEM

et al. 2018

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Abstract. The effect of adjacent loaded pile row on the existing tunnel is analysed by 3D finite element method. The MRTA project is used as reference case in this study. The case study is divided into two cases, tunnel and pile tip located in soft clay and stiff clay, respectively. The pile diameter of 1 m and pile tip located at the elevation of tunnel crown with various number of piles within the row were considered. The analysis results are shown in terms of total soil displacement (without tunnel) and maximum tunnel deformations. Both total soil displacements and tunnel deformation increase with the number of piles and approach a maximum value when the number of piles is greater than 13 and 11 for cases tunnel in soft and stiff clay, respectively. This reveals that the tunnel deformation mechanism is primarily due to the soil displacement.

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Section: Numerical Model and Feamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation on pile-soil-tunnel interaction due to adjacent loaded pile row by 3D FEM

et al. 2018

Self Cite

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“…The pile foundation has the advantages of high bearing capacity, strong resistance to non-uniform deformation, and high degree of mechanized construction, so it is widely used in industrial and civil buildings with a self-heavy superstructure, low strength of foundation soil, and high compressibility [1][2][3][4]. With the development of marine economy and high-speed traffic engineering in the 21st century, offshore engineering and high-speed railways and expressways, which can bear complicated loads such as wind, wave, and traffic for a long time, have put forward higher requirements for pile foundations [5][6][7][8]. Prestressed high-strength concrete (PHC) pipe pile has been widely used for its advantages of convenient construction, high bearing capacity, reliable quality, and short molding and curing time [9,10].…”

Section: Introductionmentioning

confidence: 99%

Field Test of Excess Pore Water Pressure at Pile–Soil Interface Caused by PHC Pipe Pile Penetration Based on Silicon Piezoresistive Sensor

Wang

Liu

Zhang

et al. 2020

Sensors

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Prestressed high-strength concrete (PHC) pipe pile with the static press-in method has been widely used in recent years. The generation and dissipation of excess pore water pressure at the pile–soil interface during pile jacking have an important influence on the pile’s mechanical characteristics and bearing capacity. In addition, this can cause uncontrolled concrete damage. Monitoring the change in excess pore water pressure at the pile–soil interface during pile jacking is a plan that many researchers hope to implement. In this paper, field tests of two full-footjacked piles were carried out in a viscous soil foundation, the laws of generation and dissipation of excess pore water pressure at the pile–soil interface during pile jacking were monitored in real time, and the laws of variation in excess pore water pressure at the pile–soil interface with the burial depth and time were analyzed. As can be seen from the test results, the excess pore water pressure at the pile–soil interface increased to the peak and then began to decline, but the excess pore water pressure after the decline was still relatively large. Test pile S1 decreased from 201.4 to 86.3 kPa, while test pile S2 decreased from 374.1 to 114.3 kPa after pile jacking. The excess pore water pressure at the pile–soil interface rose first at the initial stage of consolidation and dissipated only after the hydraulic gradient between the pile–soil interface and the soil surrounding the pile disappeared. The dissipation degree of excess pore water pressure reached about 75–85%. The excess pore water pressure at the pile–soil interface increased with the increase in buried depth and finally tended to stabilize.

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“…erefore, the deformation characteristics of tunnels constructed in soft clay layers is a constant research focus in tunnel engineering. Lueprasert et al proposed a method for predicting the deformation of soft tunnels on the basis of the horizontal and vertical tunnel contraction and elongation [5]. He et al simulated the deformation and failure process of weak surrounding rocks with an improved discontinuous deformation analysis method and the discontinuous deformation analysis for rock failure (DDARF) joint simulation model, which can simulate the deformation and failure of tunnel surrounding rocks [6].…”

Section: Introductionmentioning

confidence: 99%

Deformation Characteristics and Influence Factors of a Shallow Tunnel Excavated in Soft Clay with High Plasticity

Lei

Ji-yao

Lin

et al. 2019

Advances in Civil Engineering

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A series of problems, including large deformation of supporting structures, shotcrete peeling, and yielding of the steel frame, occurs constantly during tunnel construction in soft clay layers. These problems considerably raise the risk of tunnel construction. Thus, the deformation characteristics of soft clay around the tunnel during construction must be investigated to guarantee safety. In this research, a field test was conducted on 50 sections of a tunnel, which was built in high-plasticity clay layers. Then, the deformation characteristics of surrounding rocks and influencing laws caused by burial depth, invasion thickness of soft clay, and atmospheric precipitation were discussed. Results indicated that surrounding rocks are most likely to undergo large deformation during tunnel construction when the burial depth of tunnel ranges from 1.5D to 2.5D (D is the tunnel excavation span). Tunnel deformation also increases rapidly when the invasion thickness exceeds 60% of the tunnel height. The ratio between clay thickness and burial depth of the tunnel is another crucial index that could cause a large tunnel deformation as it exceeds 0.25. In addition, a significant correlation was observed between tunnel deformation and rainfall during the construction period. The deformation of surrounding rocks increases rapidly with rainfall and will continually develop for 1-2 weeks when the average daily rainfall is greater than 4 mm.

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Numerical investigation of tunnel deformation due to adjacent loaded pile and pile-soil-tunnel interaction

Cited by 77 publications

References 31 publications

Investigation on pile-soil-tunnel interaction due to adjacent loaded pile row by 3D FEM

Investigation on pile-soil-tunnel interaction due to adjacent loaded pile row by 3D FEM

Field Test of Excess Pore Water Pressure at Pile–Soil Interface Caused by PHC Pipe Pile Penetration Based on Silicon Piezoresistive Sensor

Deformation Characteristics and Influence Factors of a Shallow Tunnel Excavated in Soft Clay with High Plasticity

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