Advanced numerical modelling of multi-storey buildings response to tunnelling (original) (raw)

A Review Paper on Numerical Modelling of Building Response to Underground Tunneling

2020

Numerous attempts have been done to predict and subsequently control the tunnelinginduced ground movements due to the fact that the number of tunnels in urban areas is increasing. However, existing methods are faced with some limitations and cannot take into account of all the influential parameters in creating surface settlements. As a result, in many cases, the existing methods are not accurate enough, whereas prediction of the exact amount of the maximum surface settlement and the shape of settlement troughs is important to estimate the potential risk of building damage induced by tunneling. Empirically derived relationships have been mainly developed based on field observations obtained from hand mines or tunnels excavated using open faced shields. Therefore, these methods mainly consider more of geological conditions than tunneling operational parameters. Although these methods provide satisfactory results in determining settlement troughs, they tend to be misleading in estimat...

Building response to tunnelling

Soils and Foundations, 2014

Understanding how buildings respond to tunnelling-induced ground movements is an area of great importance for urban tunnelling projects, particularly for risk management. In this paper, observations of building response to tunnelling, from both centrifuge modelling and a field study in Bologna, are used to identify mechanisms governing the soil-structure interaction. Centrifuge modelling was carried out on an 8-m-diameter beam centrifuge at Cambridge University, with buildings being modelled as highly simplified elastic and inelastic beams of varying stiffness and geometry. The Bologna case study presents the response of two different buildings to the construction of a sprayed concrete lining (SCL) tunnel, 12 m in diameter, with jet grouting and face reinforcement. In both studies, a comparison of the building settlement and horizontal displacement profiles, with the greenfield ground movements, enables the soil structure interaction to be quantified. Encouraging agreement between the modification to the greenfield settlement profile, displayed by the buildings, and estimates made from existing predictive tools is observed. Similarly, both studies indicate that the horizontal strains, induced in the buildings, are typically at least an order of magnitude smaller than the greenfield values. This is consistent with observations in the literature. The potential modification to the settlement distortions is shown to have significant implications on the estimated level of damage. Potential issues for infrastructures connected to buildings, arising from the embedment of rigid buildings into the soil, are also highlighted.

Numerical Modelling of Building Response to Underground Tunnelling - A Case Study of Chennai Metro

International Journal of Civil Engineering

The advancement in underground construction and use of Tunnel boring machine for construction is deeply studied. The construction of underground tunnel in soft ground involves potential risk of damage to superstructure and may lead to collapse of tunnel. Thus it is very important to predict the surface settlement before construction to minimise risk of collapse. Numerical modelling by FEM analysis of a building named Prema Palace in Chennai, India is studied and settlement of building is compared with in-situ settlement. This also includes the numerical modelling of building response to underground tunnelling by FEM analysis w.r.t. various parameters i.e., surface settlement (Ground and building), tilting

Numerical Modelling of Building Response to Underground Tunneling-A Case Study of Pune Metro

2020

1Mr.Shubham B. Shinde, PG student affiliated to Savitribai Phule Pune University, Pune. 2Prof. A. A. Galatage, affiliated to Savitribai Phule Pune University, Pune. 3Prof. P. S. Ingole, affiliated to Savitribai Phule Pune University, Pune. 4Mr.Swapnil S. Bhosale, Structural Consultant, Pune. ---------------------------------------------------------------------***---------------------------------------------------------------------Abstract The advancement in underground construction and use of Tunnel boring machine for construction is deeply studied. The construction of underground tunnel in ground involves potential risk of damage to old age structure and may lead to collapse of structure or tunnel. Thus it is very important to predict the surface settlement before construction to minimize risk of collapse. Numerical modelling by FEM analysis of a building in Pune is studied and settlement of building is compared with in-situ settlement. This also includes the numerical modelling of...

IRJET- NUMERICAL MODELLING OF BUILDING RESPONSE TO UNDERGROUND TUNNELING -A CASE STUDY OF PUNE METRO

IRJET, 2020

The advancement in underground construction and use of Tunnel boring machine for construction is deeply studied. The construction of underground tunnel in ground involves potential risk of damage to old age structure and may lead to collapse of structure or tunnel. Thus it is very important to predict the surface settlement before construction to minimize risk of collapse. Numerical modelling by FEM analysis of a building in Pune is studied and settlement of building is compared with in-situ settlement. This also includes the numerical modelling of building response to underground tunneling by FEM analysis w.r.t. various parameters i.e., surface settlement (Ground and building, tilting). Then, a control measures over it were proposed to eliminate this risk, which are verified by using finite element software. This works focus on studying the excavation mechanics behavior of underground tunneling and its influence on the around environment, and these conclusions are useful for providing a basis for ongoing work as well similar project construction in the future.

IRJET- A REVIEW PAPER ON NUMERICAL MODELLING OF BUILDING RESPONSE TO UNDERGROUND TUNNELING

IRJET, 2020

Numerous attempts have been done to predict and subsequently control the tunneling-induced ground movements due to the fact that the number of tunnels in urban areas is increasing. However, existing methods are faced with some limitations and cannot take into account of all the influential parameters in creating surface settlements. As a result, in many cases, the existing methods are not accurate enough, whereas prediction of the exact amount of the maximum surface settlement and the shape of settlement troughs is important to estimate the potential risk of building damage induced by tunneling. Empirically derived relationships have been mainly developed based on field observations obtained from hand mines or tunnels excavated using open faced shields. Therefore, these methods mainly consider more of geological conditions than tunneling operational parameters. Although these methods provide satisfactory results in determining settlement troughs, they tend to be misleading in estimating maximum surface settlement. Analytical methods assume ground as an initially isotropic, incompressible and homogeneous mass. These methods have been only developed for circular tunnels and therefore are inapplicable for noncircular tunnels under invariant geological conditions. Finite element simulation usually obtains the settlement troughs shallower and wider than the field observations (Lee and Rowe

An equivalent beam model for the analysis of tunnel-building interaction

Tunnelling and Underground Space Technology, 2011

The aim of this work is to study the effect of structural characteristics, including stiffness, geometry and weight on tunnel-adjacent structure interaction. Ground materials, tunnel geometry and excavator device are related to a part of metro tunnel of Tehran. To describe the ground behavior due to tunneling, a 3D FE code with an elastoplastic soil model was used. The adjacent building was modeled in two ways: one as an equivalent beam or shell and the other as a real geometry (3D frames). The obtained results from this theoretical work indicate particularly that the stiffness of adjacent structure controls the ground movement distribution induced by tunnel excavation which in agree with other researchers. As it was predicatively, increasing in structure weight leads to create the large displacement components in the ground. The structure width plays also a significant role in displacement distribution of ground. The comparison of the obtained results using two methods of structure modeling shows a very good conformity between them.

Effect of Superstructure on the Stability of Underground Tunnels

Transportation Infrastructure Geotechnology, 2020

With the rapid development of underground space and the metro system in an urban area, the interaction between superstructures, foundations, and excavations with existing tunnels has been increasing. Hence, to ensure the safety of the tunnel, it is necessary to predict the displacement and stresses in tunnel induced by construction activity in its vicinity. The objective of the present study is to analyse the effect of superstructure construction on the stability of underground metro tunnels. A 2D numerical model has been developed using finite element software OptumG2 to replicate the Delhi Metro Phase 3 tunnel project. An elastoplastic model of the tunnel at a standard depth of 18 m has been analysed. The behaviour of the tunnel at the crown, invert, and springer (spring line) has been reported. The shear force and bending moment developed in tunnel lining has also been observed. The study investigates the stresses and displacement in the surrounding soil. Two parametric studies based on tunnel depth and load position have been studied. The study found that the displacement in tunnel points decreases but the lining forces increase with an increase in tunnel depth. The tunnel became stable with an increase in load eccentricity. It is also found that the maximum displacement of soil is not affected significantly either with the depth of tunnel or with load position. However, the stability of soil around the tunnel increases with an increase in depth of the tunnel and superstructure load eccentricity.

Case Study of Damage on Masonry Buildings Produced by Tunneling Induced Settlements

International Journal of Architectural Heritage, 2014

This paper analyzes the structural response of a group of masonry buildings subjected to real ground movements experienced during the construction of the L9 Metro tunnel in Barcelona, bored by a Tunnel Boring Machine (TBM)-Earth Pressure Balance Machine (EPB). The studied one-storey small dwellings represent a common building typology frequently used in those days in Barcelona's outskirts (more than 1000 were erected). Real settlement profiles are compared with the ones provided by empirical methods, which estimate the shape and the area of the trough according to the ground properties and the volume loss (inherent to the tunneling construction method). The first aim of the paper is to evaluate the effectiveness of two techniques used to predict damages in buildings resulting from tunneling subsidence: 1) the 'equivalent beam' and its subsequent refinements, and 2) the appliance of a non-linear Finite Element macro-model. The real structural damage presented in the buildings is compared with the predictions given by this two methods. Main model parameters have been determined by means of characterization experiments developed on the site and in the laboratory, thus giving a much higher significance to the analysis. The obtained predictions present a high correspondence with the actual damage registered, particularly in crack pattern and in crack widths.