Stress determination by back-analysis of excavation-induced stress changes ? a case study

Kaiser, Peter K.; Zou, Dexuan; Lang, Péter

doi:10.1007/bf01022953

Cited by 43 publications

(7 citation statements)

References 1 publication

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“…(1)The soil around the tunnel is regarded as continuous, uniform and isotropic medium; (2) Because the clear interval between double holes of the tunnel is large very much, the interaction effect between them can be ignored; (3) Materials of supporting structure and surrounding rocks are presumed as linear elastic and elastic-plastic respectively; (4) The plane strain model is adopt to analyze the dynamic stress and deformation of supporting and surrounding rock and each excavation procedure [4][5][6][7] .…”

Section: Numerical Simulation Modeling 221 the Basic Assumptionsmentioning

confidence: 99%

Selection of construction method for large section soil tunnel and analysis of monitoring results during construction period

Liu

Zhang

2010

2010 IEEE International Conference on Industrial Engineering and Engineering Management

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Relying on the background of large section soil tunnel engineering, the numerical simulation on three excavation methods for soil tunnel including bench method, arch heading method and cross diaphragm were carried out. Results show that the arch heading method is confirmed as optimum for this project by comparative analysis. And then, according to the monitoring results of the arch heading method, stress development laws and deformation characteristics of surrounding rock and supporting structure of large section soil tunnel were obtained, which include regression analysis functions of the development trend of vault settlement and horizontal convergence, distribution characteristics of ground surface settlement, development law of primary support stress and contact stress between surrounding rock and support, influence scope of tunnel face excavation and corresponding deformation law of surrounding rock as well as main deformation stage. Besides, the reliability of simulated results is verified by comparing them with the monitoring measurement data.

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Section: Numerical Simulation Modeling 221 the Basic Assumptionsmentioning

confidence: 99%

Selection of construction method for large section soil tunnel and analysis of monitoring results during construction period

Liu

Zhang

2010

2010 IEEE International Conference on Industrial Engineering and Engineering Management

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“…Direct methods usually involve uncertainties in terms of local heterogeneities and representativeness of the tests. Back analysis is an indirect method that has been widely used for the determination of the geomechanical parameters with field measurements of displacements, strain, stresses, or acoustic emission information during the construction stage (Sakurai and Takeuchi 1983;Gioda and Sakurai 1987;Gioda and Maier 1980;Sakurai et al 1995;Kaiser et al 1990;Cai et al 2007;Zhang et al 2006;Ghorbani and Sharifzadeh 2009;Vardakos et al 2007;Fakhimi et al 2004;Hisatake and Hieda 2008;Miranda et al 2011). Back analysis can be divided into two main categories: direct and indirect.…”

Section: Introductionmentioning

confidence: 99%

A Practical Indirect Back Analysis Approach for Geomechanical Parameters Identification

Zhao

Zhang

Yin

2014

Marine Georesources & Geotechnology

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Back analysis is a powerful tool to determine geomechanical parameters. In this article, a practical approach that employs the response surface method and MS Excel solver for back analysis is presented. The least square support vector machine (LSSVM)-based response surface is utilized to represent the nonlinear relationship between the geomechanical parameters and the monitored information and Excel solver is used to search the geomechanical parameters based on the monitoring information. We analyze the robustness and search ability of the proposed approach. On the other hand, two numerical cases on a circular tunnel and a slope are used to verify the proposed approach. Results clearly indicate that LSSVM-based response surface is effectively able to be used to identify the geomechanical parameters from the monitoring displacements.

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“…In 1995, Zou (1995) presented a back-analysis inverse method using relative and convergence displacements and boundary element method to estimate the effective field rock properties and in situ stresses. Other works included Kaiser et al (1990), Sakurai (1997), Mello Franco et al (2002, Sakurai et al (2003), Jeon and Yang (2004), Oreste (2005), Miranda et al (2011) and Moreira et al (2013). Those works however did not consider pore pressure, which is an important factor in the petroleum engineering.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Stress Estimation by Back Analysis Based on Wellbore Deformation with Consideration of Pore Pressure

Lin

Zou

2016

IJGE

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In oil and gas industry, wellbore stability control is paramount in an operation. It is essential to have information of the in situ stresses in well planning and prevention of wellbore failure. However, the current available measurement methods for in situ stresses in petroleum engineering are costly and often give scattering results. In this paper, a more practical displacement-based back analysis technique is proposed to determine the magnitude and orientation of the in situ stresses. The purpose is to provide an alternative tool for small operators in petroleum industry. An analytical solution is derived from displacement-stress relationship around a well in an isotropic rock with consideration of pore pressure. This method can be applied to calculate the displacement at any point around the well induced by drilling. In a reversed order, it can be used to calculate the in situ stresses from measured displacements at a number of locations on the borehole wall. For practical purpose, drained and undrained constitutive 2D models using measured diametrical deformation at different locations around a borehole wall as the input data have been developed to estimate the in situ stresses. Program codes in Matlab were written to facilitate the analysis under different conditions. An example is introduced to test the model and the program. The results validated this back-analysis approach and made a reliable estimation of the in situ stresses. The effects of pore pressure are also evaluated and are found to have significant impact on the shape of wellbore deformation. This impact differs for the drained and undrained conditions.

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Stress determination by back-analysis of excavation-induced stress changes ? a case study

Cited by 43 publications

References 1 publication

Selection of construction method for large section soil tunnel and analysis of monitoring results during construction period

Selection of construction method for large section soil tunnel and analysis of monitoring results during construction period

A Practical Indirect Back Analysis Approach for Geomechanical Parameters Identification

In-Situ Stress Estimation by Back Analysis Based on Wellbore Deformation with Consideration of Pore Pressure

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