An analytical solution for the arching effect induced by ground loss of tunneling in sand

Wu, Jun; Liao, Shaoming; Liu, Mengbo

doi:10.1016/j.tust.2018.09.025

Cited by 39 publications

(5 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the results of literature (Wu et al, 2019), the shape line of the sliding surface of the tunnel surrounding rock is an elliptic line, and the elliptic shape is also obtained through the numerical simulation results. Therefore, this paper calculates the loose Earth pressure in the tunnel from the ellipsoid theory.…”

Section: Ellipsoid Theorymentioning

confidence: 99%

“…The ellipsoid theory (Wu et al, 2019) states that in the structure of a silo storing particulate matter, there is usually an opening at the bottom, through which particles overflow under the action of gravity. Over time, all the spilled particles leave a space that approximates the shape of the ellipsoid, known as the outgoing ellipsoid.…”

Section: Ellipsoid Theorymentioning

confidence: 99%

“…Janelid and Kvapil (1966) used the looseness coefficient β to describe the relationship between the two ellipsoids. Wu et al (2019) simplified the dimensional shrinkage problem of particulate matter into a contraction in one direction while the other direction Effect of cohesive force on vertical stress under different buried depth ratio.…”

Section: Ellipsoid Theorymentioning

confidence: 99%

“…Based on the particle ellipsoid theory, Gong et al (2017) deduced the coefficient of lateral Earth pressure affected by the inclination of the slip plane and the calculation method of tunnel loose Earth pressure. Wu et al (2019) determined the shape and size of the loose area according to the principle of gravity flow, assumed that the Earth pressure in the loose area was not uniformly distributed, and modified the formula of Terzaghi's loose Earth pressure. Chevalier et al (2012) established a trapdoor test device under plane strain and conducted tests on a variety of geotechnical materials.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Study on soil pressure of loose soil in cohesive soil tunnel considering soil arch effect

Dai,

Sun,

Rong

et al. 2024

Front. Earth Sci.

View full text Add to dashboard Cite

Soil pressure in clay formation tunnels is closely related to soil arch effect and the development of slip surfaces. Firstly, numerical simulation software is used to simulate the actual situation of tunnel excavation, and the change rule of the slip-cracking surface of cohesive soil is analyzed. Secondly, based on the numerical simulation results and the ellipsoid theory, the pressure formula of Terzaghi loose Earth is modified considering that the principal stress trace is catenary. Finally, the calculation results are compared with the finite element calculation results to verify the rationality of the formula in this paper. The relationship between the internal friction angle, cohesion force c, eccentricity ε, looseness coefficient β, and the pressure of loose Earth is further studied. The results show that there is a gap between the sliding crack angles with or without dilatancy angle and it will affect the development form of soil arch. The slip angle decreases gradually with the increase of the buried depth ratio H/D and becomes stable when the buried depth ratio H/D≥3. Compared with deep-buried tunnels, the increase of internal friction angle in the shallow-buried tunnel is more conducive to reducing the overlying soil pressure. The loose soil pressure decreases with the increase of eccentricity ε and loose coefficient β, and the influence of eccentricity ε on loose soil pressure is significantly greater than that of loose coefficient β. Therefore, the change of eccentricity ε should be paid close attention in the project.

show abstract

Section: Ellipsoid Theorymentioning

confidence: 99%

Section: Ellipsoid Theorymentioning

confidence: 99%

Section: Ellipsoid Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study on soil pressure of loose soil in cohesive soil tunnel considering soil arch effect

Dai,

Sun,

Rong

et al. 2024

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

“…The arching effect in some practical situations such as tunnels and pile foundations, have also been brought into focus and modeled in the physical experiments [11,12,13,14,15]. Besides model experiments, advanced numerical simulation methods such as discrete element modeling are also used to examine the effect of soil arching under various conditions, including the trapdoor experiment, soilpile interaction, and tunnel settlement [16].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the fabric effect on the arching effect in granular materials

Deng,

Dai

2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

A series of trapdoor experiments and DEM simulations were carried out in this study to examine the arching effect in granular materials, with the focus being on the influence of the direction for particle deposition. In the tests, particles (e.g. rice grains, PVC particles and nylon particles) were dropped as if they were raining at different directions to construct granular material layers with various fabric orientations. It is shown that the mobilization of arching effect depends on the direction of particle deposition, with the arching ratio ρ increasing at first and then decreasing. The arching effect is the weakest at a deposition angle of θ = 30° in obliquely deposited granular masses. It is also found that the vertical displacement of particles in the ultimate phase increases initially; it then decreases with the variation in the orientation of particle deposition, and the largest displacement occurs at θ = 30°.

show abstract

Laboratory modelling on sand erosion caused by tunnel leakage in water-rich sandy strata

Peng,

Luo,

Luo

et al. 2024

Acta Geotech.

View full text Add to dashboard Cite

An analytical solution for the arching effect induced by ground loss of tunneling in sand

Cited by 39 publications

References 27 publications

Study on soil pressure of loose soil in cohesive soil tunnel considering soil arch effect

Study on soil pressure of loose soil in cohesive soil tunnel considering soil arch effect

Investigation of the fabric effect on the arching effect in granular materials

Laboratory modelling on sand erosion caused by tunnel leakage in water-rich sandy strata

Contact Info

Product

Resources

About