In 1988, the criterion was extended for applicability to slope stability and surface excavation problems. No matter which one is our task, we have to know the characteristics of rock fracture. Hoekbrown rock mass strength parameters m, s, and oc are suggested. The case study revealed that the rock mass quality qsystem, rock mass number nsystem, rock mass index rmi system, yudhbir rock mass rating rmr 76 and hoekbrown geological strength index gsi seem to be the most suitable systems. Lecture 9 introduction to rock strength david hart. When is a rock engineering design acceptable pre, chapter 2. Proceedings of 24th iserd international conference, seoul, south korea, th january 2016, isbn.
Brown in 1980 for the design of underground excavations. Rocscience is proud to host a library on rock engineering from the worldrenowned expert, dr. Evert hoek was born in zimbabwe, graduated in mechanical engineering from the university of cape town and became involved in rock mechanics in 1958 when he started working in research on problems of brittle fracture associated with very deep mines in south africa. While some revisions were made in 2000 these were difficult because the notes had been.
Pri ncipal, go lder assoc iates, 224 w 8th avenue, vancouver, b. The rock mass scaling relationships for m b, s and a were reported. Geotechnical engineers can select appropriate hoek brown input parameters for the design and analysis of rock engineering projects with the help of the principles introduced in this book. Rock engineering design has largely evolved from different. Jan 20, 2015 getting a grip on reality in rock engineering duration. The hoekbrown criterion was introduced in 1980 to provide input for the design of underground excavations in rock. Other notable scientists and engineers from a variety of disciplines did some interesting work on rock behaviour during the early part of this century. The compressive strength of rock is a function of the confining pressure.
Practical rock engineering evert hoek geoscienceworld. Because of the lack of suitable alternatives, the criterion has been applied to. Rock mechanics, and was probably the first to emphasise the importance of structural discontinuities on the engineering behaviour of rock masses. The hoek brown criterion was introduced in 1980 to provide input for the design of underground excavations in rock. It has been written for the nonspecialist mining or civil engineer, with worked examples, design charts, coverage of more detailed analytical methods, and of the collection and interpretation of geological and groundwater information and tests for the mechanical properties of rock.
Revised 2nd edition, the institution of mining and metallurgy, london. Pdf rock engineering course notes by evert hoek castiaux. It may fail catastrophically if the load frame is soft. Investigation methods include the collection and interpretation of geological and groundwater data, and determination of rock strength properties, including the hoek. College of science and technology, london, england. Rock slope engineering revised t h i rd ed ition evert hoek d. Rock slope engineering civil engineering i am menglim.
It presents design information on structural geology, shear strength of rock. The hoekbrown failure criterion hoek and brown 1980 is widely used in rock engineering for the determination of rock mass properties such as rock mass strength and deformation modulus e. At the time of the invitation, the author was preparing an appendices to a book sikora 2018 charles fairhurstthe long shadow published via amazon by itasca consulting group to be published by. Getting a grip on reality in rock engineering duration. May 31, 2019 the hoekbrown failure criterion hoek and brown 1980 is widely used in rock engineering for the determination of rock mass properties such as rock mass strength and deformation modulus e. The geological strength index gsi was introduced by hoek in 1994 and this index was subsequently modified and expanded as experience was gained on its application to practical rock engineering problems. The hoekbrown failure criterion and gsi 2018 edition. Brown the hoekbrown failure criterion was originally developed for estimating the strengths of hard rock masses. Estimating hoekbrown rock mass strength parameters from rock. Nov 28, 2019 this paper is based on an invited lecture presented at the arma armaamerican rock mechanics association 2018 rock mechanicsgeomechanics symposium, seattle, wa. The rock engineering projects that have been described are widely different in their locations and purposes but, whatever the purpose of the project, the rock mass is the host structure. Slope stability assessment of saptashrungi gad temple.
This edition of the criterion represents the last major revision of the hoekbrown system. Zongxian zhang, in rock fracture and blasting, 2016. However, in nearsurface excavations, where the rock stresses are lower, the fractures more frequent, and the rock mass more disturbed and weathered, there is more concern about the validity of the chile model 5 of 37 erik eberhardt ubc geological engineering isrm edition. Estimating hoekbrown rock mass strength parameters from. The criterion now incorporates both intact rock and discontinuities, such as joints, characterized by the geological strength index gsi, into a system designed to estimate the mechanical behaviour of typical rock masses encountered in tunnels, slopes and foundations. Rock slope engineering covers the investigation, design, excavation and remediation of manmade rock cuts and natural slopes, primarily for civil engineering applications. This paper is based on an invited lecture presented at the arma armaamerican rock mechanics association 2018 rock mechanicsgeomechanics symposium, seattle, wa.
In rock engineering, there are two different activities. The rock mass strength and deformation modulus are important parameters for evaluating the stability of engineering structures in or on rock. Rock mechanics and rock engineering covers the experimental and theoretical aspects of rock mechanics, including laboratory and field testing, methods of computation and field observation of structural behavior. Accordingly, in this chapter we will talk over rock fracture characteristics, rock strengths, and effects of geological structures on rock fracture. The original version of the hoekbrown criterion was developed by evert hoek and e. Pdf describes the relative likelihood that a random variable. Based on rock slope engineering third edition, 1981 by. Rock mechanics forms part of the much broader subject of geomechanics, which is concerned with the mechanical responses of all geological materials, including soils.
Hoek is probably currently the master of rock mechanics having not only invented many applied theories including hoekbrown criteria but also being a well known international consultant. Download practical rock engineering by hoek evert pdf. To incorporate the results of practical applications of the failure criterion under real engineering conditions, hoek and brown proposed equations to estimate rock mass strength pa rameters from classifications. Support of underground excavations in hard rock is the most complete and uptodate manual for use in the design of excavations and support mechanisms for underground mines. This extensively updated version of the classic text, rock slope engineering by hoek and bray, deals comprehensively with the. These notes were originally prepared throughout the period 1987 to 1993 for graduate and undergraduate classes in rock engineering in the university of toronto. Geotechnical investigation of slopes along the national highway nh1d from kargil to leh, jammu and kashmir india. This extensively updated version of the classic text, rock slope engineering by hoek and bray, deals comprehensively with the investigation. Practical application of the gsi system and the hoekbrown failure criterion in a number. The notes are intended to provide an insight into practical rock engineering to students.
This extensively updated version of the classic text, rock slope engineering by hoek and bray, deals comprehensively with the investigation, design and operation of rock slopes. In this method, pre and post peak behavior of rock mass is assumed linear and the modified hoek and browns criteria is used to estimate principle stresses hoek 1994hoek, 2000hoek et al. Hoek brown rock mass strength parameters m, s, and oc are suggested. While some revisions were made in 2000 these were difficult because the notes had been formatted as a book with sequential chapter and page numbering. The journal maintains the strong link between engineering geology and rock engineering, providing a bridge between fundamental. Probabilistic characterization of hoekbrown constant m i. Also, since the authors were most familiar with the design of underground excavations, it was chosen to formulate the criterion in terms of principal stresses. Marinos and hoek 2000, 2001 published the chart reproduced in figure 8 for use in estimating the properties of heterogeneous rock masses. The hoekbrown failure criterion for rock masses is widely accepted and has been applied in. Sep 08, 2019 the institute of mining and metallurgy and e. This classic handbook deals with the geotechnical problems of rock slope design. Lectures on rock mechanicslectures on rock mechanics. Geotechnical engineers can select appropriate hoekbrown input parameters for the design and analysis of rock engineering projects with the help of the principles introduced in this book. As the confining pressure increases so does the strength.
Sc eng principal, golder associates, excavations 224 west 8th avenue, vancouver vsy in5, canada e. The art of tunnelling in rock english subtitles duration. The hoekbrown failure criterionfrom theory to application. At the time of the invitation, the author was preparing an appendices to a book sikora 2018 charles fairhurstthe long shadow published via amazon by itasca. Probabilistic characterization of hoekbrown constant m i of. Therefore in this book you can find both the theoretical aspects and the practical applications. Hoekbrown failure criterion 2002 edition evert hoek consulting engineer, vancouver, canada carlos carranzatorres itasca consulting group inc. The rock mass strength and deformation modulus are important parameters for evaluating the stability of engineering structures in. We tend to think of rock mechanics as a modern engineering discipline and yet, as early as 1773. Practical rock engineering by hoek evert pdf is now available to download for free. Brown the hoek brown failure criterion was originally developed for estimating the strengths of hard rock masses. In this method, pre and post peak behavior of rock mass is assumed linear and the modified hoek and browns criteria is used to estimate principle stresses hoek 1994 hoek, 2000hoek et al.
Rock slope engineering by hoek, evert, 1933publication date 1981 topics. Download practical rock engineering by hoek evert pdf free. Rock mechanics, as applied in engineering geology, mining, petroleum, and civil engineering practice, is concerned with the application of the principles of engineering mechanics to the design of the. The lnstitut ion of mining and metallurgy, london 1981. It presents design information on structural geology, shear strength of rock and ground water, including weathered rock. Rock mass properties statistical curve fitting process is used to derive an equivalent mohr envelope defined by the equation. Unlike other materials used in engineering, such as steel, concrete and polymers, we cannot specify the material properties beforehand. These notes were originally prepared during the period 1987 to 1993 for undergraduate and graduate courses in rock engineering at the university of toronto. Lectures on rock mechanicslectures on rock mechanics sarvesh chandrasarvesh chandra professor dt tfciilei idepartment of civil engineering indian institute of technology kanpur kanpur, 208016 india email.
82 713 642 865 233 548 1115 484 1257 677 1079 200 1568 155 530 720 570 1055 947 1131 44 1002 145 1335 568 895 1398 1352 12 324 1012 77 1451 1080 1015 561 1620 904 92 1274 711 1148 252 406 1483 57 481 1465