Experimental and Numerical Analyses for Earth Pressure Distribution on High-Filled Cut-and-Cover Tunnels

Li, Sheng; Jianie, Yuchi; Ho, I-Hsuan; Wang, Qicai; Yu, Bin

doi:10.1007/s12205-020-1693-7

Cited by 20 publications

(7 citation statements)

References 25 publications

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“…Figures 10-12 show the horizontal earth pressure measured in the centrifuge model test under loading and unloading conditions. The test was performed at three sensor locations (top, middle, and bottom) at each cover depth (4, 8, 12 cm), and a total of five data points were recorded at each gravitational acceleration (10,20,30,40, and 50 g). The measured horizontal earth pressure acting on the box culvert was greater in the unloading than in the loading condition.…”

Section: Coefficient Of Earth Pressure At Rest Acting On Side Of Box ...mentioning

confidence: 99%

“…The earth pressure acting on the box culvert is an essential consideration in the design process, in addition to the load (live and dead). Therefore, it has been extensively investigated, and the vertical earth pressure is the most active field of research [5][6][7][8][9][10]. The latter is prominently featured in the soil-structure interaction proposed in AASHTO [11].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Horizontal Earth Pressure Acting on Box Culverts through Centrifuge Model Test

2022

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Underground space is being utilized due to the saturation of surface ground. The box culvert, as a representative infrastructure that has moved underground, is installed to protect such fixtures as electricity and gas. Because buried box culverts are necessarily affected by soil, it is important to study the earth pressure according to soil type. Herein, the horizontal earth pressure of the buried box culvert was analyzed. Accordingly, a precisely simulated centrifuge model test was performed. Additionally, the coefficient of earth pressure was analyzed. The results had significant variability because, in the existing theory, the horizontal earth pressure acting on the side of the box culvert was only calculated using the coefficient of earth pressure and the friction angle of the soil. Therefore, a correction factor was deemed necessary for calculating the horizontal earth pressure acting on the side of the box culvert.

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Section: Coefficient Of Earth Pressure At Rest Acting On Side Of Box ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of Horizontal Earth Pressure Acting on Box Culverts through Centrifuge Model Test

2022

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“…To solve the above problems, Li proposed the expanded polystyrene (EPS) load shedding method and obtained the effect of EPS load shedding on the vertical Earth pressure distribution and vertical displacement around a cut-and-cover tunnel. It is believed that the density, thickness, and width of EPS, the position of EPS in the structure, the tensile strength of the geogrid and the number of layers of the geogrid all have a significant impact on the mechanism of load reduction (Li et al, 2020a;Li et al, 2020b). Through discrete element method, Li concluded that RLC soil can reduce the top load of CCT, and studied the change of vertical soil pressure of CCT (Li et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Holmes et al proposed a new tunnel construction sequence by the cut and cover method, which reduced the impact of excavation on the surrounding environment. Hwang investigated the mechanical properties of assembled arch culvert tunnels and proposed a new construction method (Holmes et al, 2006;Shariatmadari et al, 2006;Hwang, 2009;Li et al, 2020c). Li modified the equations for the calculation of vertical and lateral Earth pressures in cut-and-cover tunnels (Li et al, 2020a).…”

Section: Introductionmentioning

confidence: 99%

A design analysis method and its application in the cover arch of cut-and-cover tunnels

Zhang

Cao²,

Xu³

2023

Front. Earth Sci.

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It is very important to improve the design of supports because the cut and cover method of layered backfill after construction is the primary method used to construct shallow buried sections of mountain tunnels. The Dujuan Valley Tunnel in Fenghua City is the subject of this research. First, a geometric model of a shallow buried section of a mountain tunnel and its construction parameters were used to develop the simplified bearing capacity analysis model for the covered arch. Second, a simplified method to calculate the internal force of the cover arch supporting structure was established by using the method of structural mechanics. Thus, a method was established to determine the safe thickness of the cover arch and to analyze the bearing capacity and stability of the enlarged foundation of the arch foot. Third, the influence of the tunnel burial depth, cap arch sag height, central angle, radius and arch foot width on the bearing characteristics of the cover arch support structure was discussed, and the optimal design principle of excavation in shallow buried sections of mountain tunnels was obtained. Finally, the calculation and evaluation of the design in an example case were used to determine the rationality of the method to design and optimize shallow buried sections of mountain tunnels with the cut and cover method.

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“…Geosynthetics have also been shown to play a certain role in load reduction on underground pipelines by Zheng et al [10], Ahmed et al [11], and Naggar et al [12]. Based on the theory of culvert load reduction, Li et al [13][14][15][16][17] performed a series of studies on load reduction in HFCCT so as to inform effective load reduction measures and evaluate various factors affecting soil arch effects of HFCCT.…”

Section: Introductionmentioning

confidence: 99%

Optimization Effects of Load Reduction for Earth Pressure on High‐Filled Cut‐and‐Cover Tunnels Using the Discrete Element Method

Xia

et al. 2021

Advances in Civil Engineering

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In the Northwestern part of Loess Plateau of China, the ravine and valley are numerous; therefore, high-filled cut-and-cover tunnels (HFCCTs) play a major role in meeting traffic needs and creating a great deal of usable land. However, due to higher backfill soil, a high earth pressure is generated, which affects the safety of HFCCTs. To this end, using the discrete element method (DEM), three load reduction measures were introduced to evaluate HFCCT: the cross section types of HFCCT; the combination of optimized cross section type with load reduction using expanded polystyrene (EPS); and the combination of optimized cross section type with load reduction using the EPS and concrete wedge (CW). We evaluated changes in earth pressure of HFCCTs with reference to the density and laying position of EPS and the height as well as width of CW. Parametric DEM studies were performed to characterize these influential factors. It was found that different cross section types of HFCCT have a certain influence on earth pressure distribution, and load reduction effects of EPS were extremely obvious, resulting in a sharp drop in vertical earth pressure on top of HFCCT and a slight growth in lateral earth pressure on the sides of HFCCT. Moreover, installation of CWs reduced the VEP and LEP of HFCCT. These factors were also shown to exert important effects on load reduction mechanisms of HFCCT. Based on their influence on earth pressure of HFCCT from a macroscopic and microscopic view, optimal values for influential factors were derived.

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Experimental and Numerical Analyses for Earth Pressure Distribution on High-Filled Cut-and-Cover Tunnels

Cited by 20 publications

References 25 publications

Analysis of Horizontal Earth Pressure Acting on Box Culverts through Centrifuge Model Test

Analysis of Horizontal Earth Pressure Acting on Box Culverts through Centrifuge Model Test

A design analysis method and its application in the cover arch of cut-and-cover tunnels

Optimization Effects of Load Reduction for Earth Pressure on High‐Filled Cut‐and‐Cover Tunnels Using the Discrete Element Method

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