Influence of Deep Excavations on Nearby Existing Tunnels

Influence of Deep Excavations on Nearby Existing Tunnels

Numerical analysis of influence of deep excavations on

the excavation; the other one is the stress variation of the subway structure in the excavation. To sum up, using Midas GTS calculation software, combined with the characteristics of the project, the influence of excavation on adjacent metro tunnel structure is simulated and analyzed focused on these three aspects mentioned above.

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(PDF) NUMERICAL ANALYSIS OF INFLUENCE OF DEEP EXCAVATION

Simplified analysis method for predicting the influence of

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NUMERICAL ANALYSIS OF INFLUENCE OF DEEP …

Underground construction may be in the vicinity of already existing tunnels. Deep excavations may have impact on the adjacent tunnels. Such excavation will impose significant influence on the tunnel linings, including changes of stress and deformation. Such effects are observed due to the "space effect" of excavation.

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Influence of deep excavation induced ground movements on

Feb 01, 2016 · In urban areas, excavations for cut-and-cover tunnels and basement construction cause detrimental effects on adjacent existing piles. Hence quantifying the excavation induced lateral deformations and bending moments on piles are important to ensure the stability of structures. In this paper, behaviour of a single pile subjected to excavation

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Behaviour of various support systems for deep excavations

Tunnels are not located near to any existing buildings. Figures 4a, b show the section and a photo-graph of the excavation at the Crossover Tunnels respectively. (b) Photograph of Excavation (a) Section of Excavation Figure 4. (a) Section (b) Photograph of Excavation at Crossover Tunnels. (a) Lateral Ground Movements (b) Piezometric Levels

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Behaviour of Existing Tunnel Due to Adjacent Deep

numerical analysis of influence of deep excavation on nearby existing tunnel May 2014 International Journal of Research in Engineering and Technology 03(18):120-124

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Influence of Deep Excavations On Nearby Existing Tunnels

Influence of Deep Excavations on Nearby Existing Tunnels. Xu Huang1; Helmut F. Schweiger2; and Hongwei Huang3. Abstract: In Shanghai, a number of new underground passages are being constructed, often requiring deep excavations.

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Influence of Deep Excavations on Nearby Existing Tunnels

Apr 02, 2013 · When the excavations are in the vicinity of existing tunnels, it is necessary to assess the influence of these excavations on existing tunnels such as displacements of the lining and additional loads on the lining. This paper presents a finite-element parametric study of tunnel behavior caused by nearby deep excavation.

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Numerical analyses of influence of overlying pit

Apr 06, 2010 · The maximum heave measured in influence of overlying excavation on existing tunnels, 2D FEM method was used to study the effect of overlying the tunnel lining is about 50 mm and the rate of heave excavation on existing tunnels, and then the influences of shows little sign of decreasing although the excavation [2] took place over 27 years.

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Influence of deep excavation induced ground movements on

TY - JOUR. T1 - Influence of Deep Excavations on Nearby Existing Tunnels. AU - Huang, Xu. AU - Schweiger, Helmut. AU - Huang, Hongwei. PY - 2013. Y1 - 2013

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Effect of Deep Excavations on Adjacent Structures and

pile foundation of an existing nearby building. (Zumrawi & El-Amin, 2016) [5] studied also the importance of deep excavation supporting systems and their influence on nearby structures. 2. Numerical Modelling 2.1 Model Geometry The excavation is 12.0 m deep, and 25.5 x 29.0 m wide. It's surrounded by two buildings of six floors each. The

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1. Introduction

It can be seen that the value of the peak load has a great influence on the existing tunnel. By reducing the peak load of blasting appropriately, we can ensure the safety of the existing tunnel and the construction efficiency of the tunnel under construction. which has the greatest disturbance to the existing tunnel. Before the excavation

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Prediction of tunnel displacement induced by adjacent

Deep excavation may have impact on the adjacent tunnels. The interaction between new excavations and existing tunnels has been increasingly serious with the rapid development of underground space and metro system in urban area. It hence creates a high necessity to predict tunnel displacement induced by nearby excavation to ensure the safety of tunnel.

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Study on influence of deep excavations on existing tunnels

deep excavations in the Shanghai area. Study on influence of deep excavations on existing tunnels using PLAXIS-GiD » In this contribution some results from a comprehensive study investigating different geometric layouts are presented employing PLAXIS-GiD. As ground conditions in Shanghai are very challenging due to the presence of up to 60m

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NUMERICAL ANALYSIS OF INFLUENCE OF DEEP EXCAVATION …

To improve understanding of the structural response of existing tunnels to nearby deep excavations, this paper reports a more-detailed 3D analysis performed with the FE …

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[PDF] Design and Behavior of A Deep Excavation Adjacent to

An excavation, 19.8m deep with an area of 20000m 2, was constructed near existing historic buildings and tunnels in Shanghai. The excavation was supported by diaphragm walls and five levels of reinforced concrete struts. In order to minimize the influences of excavation on the buildings and tunnels, the soil at the excavated side was improved by the deep mixing method …

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Simplified analysis method for predicting the influence of

Feb 01, 2016 · In urban areas, excavations for cut-and-cover tunnels and basement construction cause detrimental effects on adjacent existing piles. Hence quantifying the excavation induced lateral deformations and bending moments on piles …

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(PDF) NUMERICAL ANALYSIS OF INFLUENCE OF DEEP …

Apr 02, 2013 · Influence of Deep Excavations on Nearby Existing Tunnels. In Shanghai, a number of new underground passages are being constructed, often requiring deep excavations. When the excavations are in the vicinity of existing tunnels, it is necessary to assess the influence of these excavations on existing tunnels such as displacements of the lining and additional loads on …

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Contributions to responses of existing tunnel subjected to

The main focus of this problem is the influence of nearby excavation on the existing tunnel. Hence, the tunneling process in the numerical simulation is commonly greatly simplified, and the soil mass excavation is generally modeled by activating the retaining wall and struts, and deactivating the soil mass to excavate.

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Tunnel Analysis using Plaxis 2D

of deep excavation on nearby existing tunnel", International Journal of Research in Engineering and Technology, pp. 120-124. [8] Desai, Dodagoudar (2014), "Evaluation of tunnel induced subsidence using finite element method." [9] Shabna, Sankar, "Numerical analysis of shallow tunnels in soft ground

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