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Vibration diagnostics of weak base embankments

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Research in Cold and Arid Regions 2013年第5期5卷 530-533页

作者： Evgenij Ashpiz Vladimir Kapustin Svetlana Klepikova Maxim Shirobokov Moscow State University of Railway Transportation Research and survey institute geotech

In this paper the theoretical background was analyzed for vibration diagnostics method and experience in its application for weak base embankments. General schemes of survey and recommendations on hardware systems and... 详细信息

关键词： vibration diagnostics embankments weak base

Integrated geophysical surveys on railroads in permafrost areas

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Research in Cold and Arid Regions 2013年第5期5卷 582-586页

作者： A.Ivanov S.Klepikova M.Shirobokov A.Urusova A.Savin Research and survey institute geotech of Moscow Moscow State University of Railway Transportation

The zones of thawed ground in the permafrost area are most dangerous from engineer-geologist effect point of view. Detection of such zones, as making forecast of their movement is the main task of engineer-geologist survey been held in railway industry. This paper presents general issues concerning railway construction and operation in permafrost areas. comprehensive geophysical methods to monitor the development of thawed soils axe considered in detail. The main physical parameters which help define permafrost and thawed soil patches are described. Author of current paper pointed out main factors, allowing predicting potential areas of development of thawed grounds. They offered set non-destructive methods： GPR investigations, seismic survey and elec- tric exploration. Whole sets of geophysical data： electric resistivity, velocity of S-wave and P-wave （and their correlation）, allow us with high confidence specify characteristics and state of soil either under the line of road, or near it. At the same time the meth- od allows to predict direction of further development of thawed ground area.

关键词： geophysical surveys on railroads ground-penetrating radar geoelectric sounding seismic refraction survey perma- frost thawed soils

Characteristics of Shale Reservoir and Sweet Spot Identification of the Lower Cambrian Niutitang Formation in Northwestern Hunan Province, China

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Acta Geologica Sinica(English Edition) 2019年第3期93卷 573-587页

作者： QIN Mingyang CAO Zheng GUO Jianhua HUANG Yanran SUN Lianpu DONG Li Central South University Press Changsha 410083China School of Geosciences and Info-Physics Engineering Central South UniversityChangsha 410083China The survey Academy of Coal Geology in Hunan Changsha 410014China School of Geosciences China University of PetroleumQingdao 266580China School of Petroleum Engineering Chongqing University of Science and TechnologyChongqing 401331China Hunan Provincial Key Laboratory of Shale Gas Resource Utilization Hunan University of Science and TechnologyXiangtan411201China Sino geotech(Beijing)Science&Technology Co. Ltd.Beijing 100020China Exploration&Production Research institute SINOPEC Beijing 100083China Shandong Provincial Key Laboratory of Depositional Mineralization&Sedimentary Mineral Shandong University of Science and TechnologyQingdao 266590China

The accumulation and productivity of shale gas are mainly controlled by the characteristics of shale reservoirs;study of these characteristics forms the basis for the shale gas exploitation of the Lower Cambrian Niutitang Formation(Fm),Southern *** this study,core observation and lithology study were conducted along with X-ray diffraction(XRD)and electronic scanning microscopy(SEM)examinations and liquid nitrogen(N2)adsorption/desorption and CH4 isothermal adsorption experiments for several exploration wells in northwestern Hunan Province,*** results show that one or two intervals with high-quality source rocks(TOC>2 wt%)were deposited in the deep-shelf *** source rocks,which were mainly composed of carbonaceous shales and siliceous shales,had high quartz contents(>40 wt%)and low clay mineral(50 nm in diameter).The shale reservoir has strong adsorption capacity for *** Langmuir volume(VL)varied from 1.63 to 7.39 cm^3/g,with an average of 3.95 cm^3/*** characteristics of shale reservoir are controlled by several factors:(1)A deep muddy continental shelf is the most favorable environment for the development of shale reservoirs,which is controlled by the development of basic materials.(2)The storage capacity of the shale reservoir is positively related to the TOC contents and plastic minerals and negatively related to cement minerals.(3)High maturity or overmaturity leads to the growth of organic pores and microfractures,thereby improving the reservoir storage *** can be deduced that the high percentage o

关键词： Northwestern Hunan Province Niutitang Formation reservoir characteristics control factors sweet spots identification

Corrigendum to "Experiments on thermo-hydro-mechanical behaviour of Opalinus Clay, Mont Terri Rock Laboratory, Switzerland" [J Rock Mech geotech Eng 9 (2017) 502-510]

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Journal of Rock Mechanics and geotechnical Engineering 2018年第6期10卷 1190-1190页

作者： Paul Bossart David Jaeggi Christophe Nussbaum Swiss Geological survey at swisstopo WabernSwitzerland

In the paper of Bossart et al.(2017),published in Journal of Rock Mechanics and geotechnical Engineering(JRMGE),Table 1 is *** this table,the duration of the four experiments is shown,together with the responsible par...

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