Analysis of the behavior of DOT tunnel lining caused by rolling correction operation

Shen, Shui‐Long; Horpibulsuk, Suksun; Liao, Shaoming; Peng, Fang-Le

doi:10.1016/j.tust.2008.05.003

Cited by 55 publications

(11 citation statements)

References 2 publications

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“…Thus, higher stress levels may occur in rolled DOT linings than those in the unrolled state ). The analytical results presented by Shen et al (2009) show that internal forces in the tunnel lining are altered significantly due to the rolling correction operation during DOT construction. With the increase in the rolling correction angle, the magnitude of the internal forces changed remarkably.…”

Section: Rolling Correction Operationmentioning

confidence: 99%

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Evaluation of the effect of rolling correction of double-o-tunnel shields via one-side loading

Shen

Luo

2010

Can. Geotech. J.

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During construction of a double-o-tunnel (DOT), rolling will inevitably occur due to the following: (i) nonuniformity of subsoil condition, (ii) manufacturing errors in the DOT shield machine, (iii) different pulling forces at two sides of the DOT, (iv) effect of assembled segments, (v) loss of grout, and (vi) inappropriate operation. In engineering practice, rolling correction using a one-side load at the elevated side is a cost-effective method. The weight of the one-side load is determined by the experience of the engineers and (or) through observation of the returned rolling angle. However, these methods cannot predict the value of the one-side load before applying it. This paper presents a series of finite element analyses that was performed to investigate the relationship among the one-side load, rolling angle, and subsoil deformation. The analytical results show that the proposed approach can predict field-observed data well. It is concluded that analytical results can be used as guidance for DOT construction.Résumé : Pendant la construction d'un tunnel double circulaire (« double-o-tunnel, DOT »), il y aura inévitablement du roulage pour les raisons suivantes : (i) des conditions de sous-sol non uniformes; (ii) des erreurs lors de la manufacture du bouclier pour foncer le tunnel DOT; (iii) des forces différentes tirant de chaque côté du tunnel DOT; (iv) les effets des segments assemblés; (v) les pertes de coulis; (vi) une opération inappropriée. Dans la pratique, une méthode efficace et peu coûteuse est la correction du roulage par l'ajout d'une charge d'un côté, du côté élevé. Le poids de la charge est déter-miné par l'expérience des ingénieurs et (ou) par l'observation de l'angle de roulage suite à l'application de la charge d'un côté. Cependant, ces méthodes ne peuvent pas prédire la valeur de la charge avant son application. Cet article présente des analyses par éléments finis qui ont été effectuées pour évaluer la relation entre la charge d'un côté, l'angle de roulage et la déformation du sous-sol. Les résultats analytiques démontrent que l'approche proposée permet de bien prédire les observations sur le terrain. On peut ainsi conclure que les résultats analytiques peuvent être utilisés pour diriger la construction d'un DOT.Mots-clés : bouclier pour le fonçage d'un tunnel double circulaire (« DOT »), correction du roulage, charge d'un côté, analyse par éléments finis, tassement.[Traduit par la Rédaction]

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Section: Rolling Correction Operationmentioning

confidence: 99%

“…Figure 3 shows a recorded case of the asymmetrical surface settlement trough of a DOT constructed in Tokyo (Yonei 2000). The asymmetrical distribution of the settlement trough may be due to the operation of rolling correction during DOT tunneling (Iida and Sumida 1992;Yonei 2000;Ishihara et al 2003;Shen et al 2006Shen et al , 2009.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of rolling correction of double-o-tunnel shields via one-side loading

Shen

Luo

2010

Can. Geotech. J.

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“…The soil (or rock) conditioned by foam features high elasticity, low permeability, high compressibility, low shear strength, and high flowability . Therefore, foam conditioning can be employed to deal with many problems during tunnel excavation, such as soil clogging, screw conveyor spewing, serious wear of cutterhead, and groundwater inflow . Moreover, foam conditioning agent is lower cost and more environmentally friendly than the above three conditioning agents.…”

Section: Introductionmentioning

confidence: 99%

“…[32][33][34][35][36] Therefore, foam conditioning can be employed to deal with many problems during tunnel excavation, such as soil clogging, screw conveyor spewing, serious wear of cutterhead, and groundwater inflow. [37][38][39][40][41][42][43][44][45][46] Moreover, foam conditioning agent is lower cost and more environmentally friendly than the above three conditioning agents. Some research works on the properties of foam and foam-conditioned soil or rock have been reported in literature, 47,48 but few attentions are paid on reducing the groundwater inflow by taking the advantage of the low permeability of foam conditioned soil.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of foam conditioning effect on groundwater inflow at tunnel cutting face

Liu

Shen

Zhou

et al. 2018

Num Anal Meth Geomechanics

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Summary This paper presents an analytical evaluation on the influence of foam conditioning on groundwater inflow at shield tunnel cutting face by the force‐equilibrium principle. Three key variables are highlighted, namely, the maximum foam infiltration distance, the critical infiltration distance, and the hydraulic conductivity of foam‐conditioned soil or rock fissure. To capture the variation of water level induced by foam injection, a dynamic water‐level equation is considered in the force‐equilibrium principle. The proposed analytical equations are employed to analyze a water inflow case during shield tunneling in a weathered mylonite fault. The results indicate that the hydraulic conductivity of foam‐conditioned mylonite and the infiltration distance decrease with an increase of shear stress of foam fluid. A three‐dimensional finite element model is employed to validate the analytical solutions. The comparison between the observed and calculated results confirms that the proposed method can predict groundwater inflow in foam‐conditioned soils.

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“…In 1989, Japan took the lead in adopting the DOT shield technology for a subway project in Hiroshima [1]. In the following ten years, more than ten DOT shield tunnels have been built in Japan, for example, Nagoya express railway tunnel; then, China first applied the DOT shield technology in the construction of Shanghai rail transit projects from 2002 to 2006 [2, 3]. In 2009, the Taoyuan International Airport Access Mass Rapid Transit system in Taipei, Taiwan, was constructed by the DOT shield machine [4].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Face Stability during Excavation of Double‐O‐Tube Shield Tunnel

Yang

Zhou

et al. 2013

The Scientific World Journal

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This paper focuses on the face stability analysis of Double-O-Tube shield tunnel. This kind of analysis is significant to ensure the safety of workers and reduce the influence on the surrounding environment. The key point of the stability analysis is to determine the supporting pressure applied to the face by the shield. A collapse failure will occur when the supporting pressure is not sufficient to prevent the movement of the soil mass towards the tunnel. A three-dimensional collapse failure mechanism was presented in this paper. Based on the mechanism of a single circular shield tunnel, the mechanism of Double-O-Tube shield tunnel was established by using the fact that both of the mechanisms are symmetrical. Then by means of the kinematic theorem of limit analysis, the numerical results were obtained, and a design chart was provided. The finite difference software FLAC3D was applied to investigate the face failure mechanism of DOT shield tunnel established in this paper; the critical supporting pressures of the collapse failure mechanism in different strata (sand and silt) were calculated. Through comparative analysis, the theoretical values were very close to the numerical values. This shows that the face failure mechanism of DOT shield tunnel is reasonable, and it can be applied to the sand and silt strata.

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Analysis of the behavior of DOT tunnel lining caused by rolling correction operation

Cited by 55 publications

References 2 publications

Evaluation of the effect of rolling correction of double-o-tunnel shields via one-side loading

Evaluation of the effect of rolling correction of double-o-tunnel shields via one-side loading

Evaluation of foam conditioning effect on groundwater inflow at tunnel cutting face

Analysis of Face Stability during Excavation of Double‐O‐Tube Shield Tunnel

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