Application of data analysis method in geotechnical engineering

Geotechnical seismic engineering belongs to the cross field of geotechnical engineering and earthquake engineering. Due to the dual effects of the variability of geotechnical objects and the complexity of dynamic loading, the scientific problems involved in this field have to face more uncertainties. Through the analysis on the status quo of uncertainty analysis methods in geotechnical earthquake engineering in the field of non deterministic analysis clear difficulties, weak links with all kinds of uncertainty analysis method to solve the inherent weakness of determining geotechnical earthquake engineering uncertainty problem, and can determine the establishment and improvement to provide some ideas and direction analysis model for non.

Probabilistic back analysis for geotechnical engineering based on Bayesian and support vector machine

Geomechanical parameters are complex and uncertain.In order to take this complexity and uncertainty into account,a probabilistic back-analysis method combining the Bayesian probability with the least squares support vector machine(LS-SVM) technique was proposed.The Bayesian probability was used to deal with the uncertainties in the geomechanical parameters,and an LS-SVM was utilized to establish the relationship between the displacement and the geomechanical parameters.The proposed approach was applied to the geomechanical parameter identification in a slope stability case study which was related to the permanent ship lock within the Three Gorges project in China.The results indicate that the proposed method presents the uncertainties in the geomechanical parameters reasonably well,and also improves the understanding that the monitored information is important in real projects.

Congratulatory Letter to the Journal of Rock Mechanics and Geotechnical Engineering

Over many years now, I have had the privilege to observe China＇s spectacular growth, not only in terms of the expansive construction of infrastructural facilities built on and in rock masses, but also in terms of the associated rock mechanics and rock engineering advances. Moreover, over the years, I have enjoyed looking through the issues of the existing Chinese Journal of Rock Mechanics and Engineering （CJRME）. The content of this Journal, initiated in 1982, is partially accessible to foreigners because the Contents, paper Abstracts and Figure captions are published in English. The number of rock mechanics articles in each monthly issue of the Journal is far more than any other country can produce. This activity is also reflected in the fact that China now has more ISRM members （502） than any other country -- and the number is no doubt continuing to grow! Furthermore, the Editor-in-Chief of the CJRME, Professor Feng Xiating, will be the next ISRM President for the period 2011-2015.

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING Instructions to authors

Aims and scope Journal of Rock Mechanics and Geotechnical Engineering （JRMGE） is a quarterly journal focused on the latest research achievements in rock mechanics and geotechnical engineering, and provides an opportunity for colleagues from all over the world to understand the current developments in rock mechanics and geotechnical engineering.

Constitutive modeling for mechanical behaviors of geomaterials, newdesigns and techniques in geotechnical engineering

This Special Issue of the Journal of Rock Mechanics and GeotechnicalEngineering （JRMGE） contains 13 papers prepared by internationalexperts on various general topics in geomechanics, rockmechanics and geotechnical engineering. It represents a usefulmix of theoretical developments, testing and practical applications.We present in the following brief details in the papers, alphabeticallyin accordance with the last name of the first author.Barla presents a review of tunneling techniques with emphasison the full-face method combining full-face excavation and facereinforcement by means of fiber-glass elements with a yieldcontrolsupport. This method has been used successfully in difficultgeologic conditions, and for a wide spectrum of ground situations.The validation of the method with respect to the Saint Martin LaPorte access adit along the LyoneTurin Base tunnel experiencingseverely squeezing conditions during excavation is also includedin the paper. The numerical modeling with consideration of therock mass time-dependent behavior showed a satisfactory agreementwith monitoring results.

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING Instructions to authors

A more detailed set of instructions can be found in the journal’s home page at: http://www.rockgeotech.orgAims and scopeJournal of Rock Mechanics and Geotechnical Engineering (JRMGE) is a quarterly journal focused on the latest

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING Instructions to authors

A more detailed set of instructions can be found in the journal’s home page at： http：//www.rockgeotech.orgAims and scopeJournal of Rock Mechanics and Geotechnical Engineering （JRMGE）,

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING Instructions to authors

Aims and scope Journal of Rock Mechanics and Geoteclmical Engineering （JRMGE） is a quarterly journal focused on the latest research achievements in rock mechanics and geotechnical engineering, and provides an opportunity for colleagues fxom all over the world to understand the current developments in rock mechanics and geotechnical engineering. The scope of articles includes new theories, new technologies, new methods and experience, in-situ and laboratory tests, new developments, and timely reviews on selected subjects in rock mechanics and geotechnical engineering in China and overseas. Articles should contain original data and facts that support the conclusions. Manuscripts should conform to the format guidelines set out below.

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING Instructions to authors

A more detailed set of instructions can be found in the journal’s home page at: http://www.rockgeotech.orgAims and scopeJournal of Rock Mechanics and Geotechnical Engineering (JRMGE)

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING

Aims and scope Journal of Rock Mechanics and Geotechnical Engineering （JRMGE） is a quarterly journal focused on the latest research achievements in rock mechanics and geotechnical engineering, and provides an opportunity for colleagues from all over the world to understand the current developments in rock mechanics and geotechnical engineering. The scope of articles includes new theories, new technologies, new methods and experience, in-situ and laboratory tests, new developments, and timely reviews on selected subjects in rock mechanics and geotechnical engineering in China and overseas. Articles should contain original data and facts that support the conclusions. Manuscripts should conform to the format guidelines set out below.

An Information Theory for the Geotechnical Engineering Inverse Problem

ＡｎＩｎｆｏｒｍａｔｉｏｎＴｈｅｏｒｙｆｏｒｔｈｅＧｅｏｔｅｃｈｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇＩｎｖｅｒｓｅＰｒｏｂｌｅｍＢｙＬｉｕＷｅｉｎｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｉｖｉｌＥｎｇｉｎｅｅｒｉｎｇ，ＮｏｒｔｈＪｉａｏｔｏｎｇＵｎｉｖｅｒｓｉ...

Welcome to subscribe to the new journal Journal of Rock Mechanics and Geotechnical Engineering

Journal of Rock Mechanics and Geotechnical Engineering（JRMGE）is a new academic publication in English launched in 2009,co-sponsored by Institute of Rock and Soil Mechanics,China Academy of Sciences,Chinese Society for Rock Mechanics and Engineering and Wuhan University.

Environmental effect and treatment of urban construction in geotechnical engineering

The interact of construction and circumstance becomes more and more obviously,and research on it is essentially urgent.The way to solve it,first it relies on quantifiable evaluation to the effects done by different construction techniques,then,choose related techniques which cause less damage according to the endurance of circumstance.

The Role of Geotechnical Engineering in Photovoltaic Solar Photovoltaic Energy in Arid Climate Regions

The photovoltaic solar energy is comprised of many engineering disci-plines.Geotechnical engineering is one of those disciplines in which it has important functions in the solar photovoltaic technology and particularly for large scale projects which usually employed in open areas such as parks or deserts.The aim of this paper is to present in depth the role of the geotechnical engineering in the solar photovoltaic energy and clarifying the common challenges facing this technology in arid climate regions.It is found that the lack of specialised codes and specifi cations that needed for foundation design and in selecting the proper foundation types.This would significantly affect the development of this technology in terms of efficien-cy and performance of the proposed solar photovoltaic systems.The hot weather climate and induced stresses by wind speed are also critical issues that should be considered.In order to avoid the uncertainty of data such as soil properties,the use of numerical modelling techniques is an eff ective method to help determining the most proper parameters needed for design and analyse purposes.

Analysis of Geotechnical Engineering Safety Technology in Urban Underground Space Construction

With the accelerating pace of urbanization,the development and application of urban underground space has attracted much attention.In the construction of urban underground space,geotechnical engineering safety is the key point for construction.Based on this,this paper analyzes the application of geotechnical engineering safety technology in urban underground space construction,in hope that this analysis can provide a scientific reference for the rational application of geotechnical engineering safety technology as well as the construction and development of urban underground space.

Predicting the friction angle of clays using a multi-layer perceptron neural network enhanced by yeo-johnson transformation and coral reefs optimization

The accurate prediction of the friction angle of clays is crucial for assessing slope stability in engineering applications.This study addresses the importance of estimating the friction angle and presents the development of four soft computing models:YJ-FPA-MLPnet,YJ-CRO-MLPnet,YJ-ACOC-MLPnet,and YJCSA-MLPnet.First of all,the Yeo-Johnson(YJ)transformation technique was used to stabilize the variance of data and make it more suitable for parametric statistical models that assume normality and equal variances.This technique is expected to improve the accuracy of friction angle prediction models.The friction angle prediction models then utilized multi-layer perceptron neural networks(MLPnet)and metaheuristic optimization algorithms to further enhance performance,including flower pollination algorithm(FPA),coral reefs optimization(CRO),ant colony optimization continuous(ACOC),and cuckoo search algorithm(CSA).The prediction models without the YJ technique,i.e.FPA-MLPnet,CRO-MLPnet,ACOC-MLPnet,and CSA-MLPnet,were then compared to those with the YJ technique,i.e.YJ-FPA-MLPnet,YJ-CRO-MLPnet,YJ-ACOC-MLPnet,and YJ-CSA-MLPnet.Among these,the YJ-CRO-MLPnet model demonstrated superior reliability,achieving an accuracy of up to 83%in predicting the friction angle of clay in practical engineering scenarios.This improvement is significant,as it represents an increase from 1.3%to approximately 20%compared to the models that did not utilize the YJ transformation technique.

Uncertainty quantification of inverse analysis for geomaterials using probabilistic programming

Uncertainty is an essentially challenging for safe construction and long-term stability of geotechnical engineering.The inverse analysis is commonly utilized to determine the physico-mechanical parameters.However,conventional inverse analysis cannot deal with uncertainty in geotechnical and geological systems.In this study,a framework was developed to evaluate and quantify uncertainty in inverse analysis based on the reduced-order model(ROM)and probabilistic programming.The ROM was utilized to capture the mechanical and deformation properties of surrounding rock mass in geomechanical problems.Probabilistic programming was employed to evaluate uncertainty during construction in geotechnical engineering.A circular tunnel was then used to illustrate the proposed framework using analytical and numerical solution.The results show that the geomechanical parameters and associated uncertainty can be properly obtained and the proposed framework can capture the mechanical behaviors under uncertainty.Then,a slope case was employed to demonstrate the performance of the developed framework.The results prove that the proposed framework provides a scientific,feasible,and effective tool to characterize the properties and physical mechanism of geomaterials under uncertainty in geotechnical engineering problems.