2000 Vol. 8, No. 4

论文
On the basis of comprehensive analyses of development trends of science and technology, economy, and society at the early 21th century, on the basis of demands of infrastructure construction in Chinas moderizing, on the basis of the orientation of integrating environmental safity and economic benifits in engineering construction, and on the basis of the double attribute that engineering geology is between natural sciences and humanities, the study and development of engineering geology in the future should be to take the mutual feeding process of engineering construction and geological environment as the center of study for achieving a coordinate development and strengthen the close combination of engineering geological theories, geological techniques and engineering construction for improving the service of engineering geology in engineering construction. The productive force distribution, the total development trend, key points and the basic framework of science and technology on three levels served by engineering geology and environment science are also approached in this paper. Scientific and technical difficult problems that need to solve in current engineering construction are preliminarily analyzed. On the basis of comprehensive analyses of development trends of science and technology, economy, and society at the early 21th century, on the basis of demands of infrastructure construction in Chinas moderizing, on the basis of the orientation of integrating environmental safity and economic benifits in engineering construction, and on the basis of the double attribute that engineering geology is between natural sciences and humanities, the study and development of engineering geology in the future should be to take the mutual feeding process of engineering construction and geological environment as the center of study for achieving a coordinate development and strengthen the close combination of engineering geological theories, geological techniques and engineering construction for improving the service of engineering geology in engineering construction. The productive force distribution, the total development trend, key points and the basic framework of science and technology on three levels served by engineering geology and environment science are also approached in this paper. Scientific and technical difficult problems that need to solve in current engineering construction are preliminarily analyzed.
The study of mathematical model of structured soils is the key of soil mechanics in the coming century. In this paper, the structural characteristics of one recent marine soft soil are investigated, and much is attributed to probe the hardening mechanism of plastic volumetric strains and plastic shear strains, then the yield locus with two hardening parameters in p q stress plane is identified , the plastic stress strain relationship is finally formulated with structural parameterm. The study of mathematical model of structured soils is the key of soil mechanics in the coming century. In this paper, the structural characteristics of one recent marine soft soil are investigated, and much is attributed to probe the hardening mechanism of plastic volumetric strains and plastic shear strains, then the yield locus with two hardening parameters in p q stress plane is identified , the plastic stress strain relationship is finally formulated with structural parameterm.
2000, 8(4): 400-403.
Abstract(2751)
94KB(898)
The strategic decision of large scale economic development in West China has been made by our government recently. There are so many zones deficient in water in the West China. So the first main task for the development in the West China is to search for water resources. A systematic achievement in searching for groundwater and evaluation of water resources have been obtained in Nanjing University. By using neotectonic theory and preferred plane theory, we have developed multiple models for development of water resources which are short in the mountain areas of the region. These models have been successfully used in Shunping County of Hebei Province. We consider that these models will be greatly helpful in solving problem of water shortage in the West China and have practical significance for the economic development. The strategic decision of large scale economic development in West China has been made by our government recently. There are so many zones deficient in water in the West China. So the first main task for the development in the West China is to search for water resources. A systematic achievement in searching for groundwater and evaluation of water resources have been obtained in Nanjing University. By using neotectonic theory and preferred plane theory, we have developed multiple models for development of water resources which are short in the mountain areas of the region. These models have been successfully used in Shunping County of Hebei Province. We consider that these models will be greatly helpful in solving problem of water shortage in the West China and have practical significance for the economic development.
WT5,5BZ]By study of the mechanical characteristics of fault rocks, the authors consider that the water bursting is an instant aneous geologic event under a combined effect. The process before water bursting acts as a geological activation related to time of exploitation. The geological process and the instancy of water bursting correspond to multi factors: rockmass elastic deformation, damping deformation, steady state flow deformation, and accelerated flow deformation. So the water bursting has time effect characteristic. WT5,5BZ]By study of the mechanical characteristics of fault rocks, the authors consider that the water bursting is an instant aneous geologic event under a combined effect. The process before water bursting acts as a geological activation related to time of exploitation. The geological process and the instancy of water bursting correspond to multi factors: rockmass elastic deformation, damping deformation, steady state flow deformation, and accelerated flow deformation. So the water bursting has time effect characteristic.
The land along the Guangdong coast is not only a relatively developed economical region,but also a friable geoenvironmental region. In the past few decades earthquake, soil erosion,ground lollapses, landslides, karstic sink, ground fissure, land subsidence, soft soil foundation deformation, etc. have caused considerable property damage and casualties, which is greatly related to the evolution of geoenvironment in the region. In the case it is very necessary to assess geoenvironment quality of the region. The occurrence of geological hazards reflects the variation of structure and state of geoenvironment in the region, which is further controlled by the geoenvironmental factors. Based on the investigation and statistic analysis of formation conditions of geologic hazards and influencing factors, the geoenvironment quality of the region can be divided into tectonic stability, slope stability, and foundation stability, then an index system for three layer surfaces was set up for geoenvironmental quality assessment. It includes active faults, earthquake activities, relief height, slope gradient, gulch incision density, soil erosion intensity, densities of collapses and landslides, soil mass bearing capacity, and ground fissure density. The geoenvironment quality is classified into five classes: best, good, moderate, worse, and worst, with linear subjection function of the indices and the weightings of 9 factors given by experts. A fuzzy mathematic model for multifactor comprehensive assessment was developed. Based on the model190 elements for the region were calculated with Fortran program. The result isshown in a zonation map of the geoenvironment quality, from that the result can be compared with the essential situation of the geoenvironment in the region, and it further indicates that the Fuzzy mathematic model developed is feasible and rational, and 17 geoenvironment quality subzones were distinguished. The result of assessment and zonation provide a necessary and sufficient information to users for urban construction planning, land rational use, and construction of major engineering works in the region. The land along the Guangdong coast is not only a relatively developed economical region,but also a friable geoenvironmental region. In the past few decades earthquake, soil erosion,ground lollapses, landslides, karstic sink, ground fissure, land subsidence, soft soil foundation deformation, etc. have caused considerable property damage and casualties, which is greatly related to the evolution of geoenvironment in the region. In the case it is very necessary to assess geoenvironment quality of the region. The occurrence of geological hazards reflects the variation of structure and state of geoenvironment in the region, which is further controlled by the geoenvironmental factors. Based on the investigation and statistic analysis of formation conditions of geologic hazards and influencing factors, the geoenvironment quality of the region can be divided into tectonic stability, slope stability, and foundation stability, then an index system for three layer surfaces was set up for geoenvironmental quality assessment. It includes active faults, earthquake activities, relief height, slope gradient, gulch incision density, soil erosion intensity, densities of collapses and landslides, soil mass bearing capacity, and ground fissure density. The geoenvironment quality is classified into five classes: best, good, moderate, worse, and worst, with linear subjection function of the indices and the weightings of 9 factors given by experts. A fuzzy mathematic model for multifactor comprehensive assessment was developed. Based on the model190 elements for the region were calculated with Fortran program. The result isshown in a zonation map of the geoenvironment quality, from that the result can be compared with the essential situation of the geoenvironment in the region, and it further indicates that the Fuzzy mathematic model developed is feasible and rational, and 17 geoenvironment quality subzones were distinguished. The result of assessment and zonation provide a necessary and sufficient information to users for urban construction planning, land rational use, and construction of major engineering works in the region.
WT5,5BZ]Geo environmental assessment is an important tool in planning and site selection for human engineering activities. The characteristics of various types of urban land uses and criteria for evalnatin of the geo environment are discussed in this paper. A GIS aided geo environmental assessment for urban planning is proposed. by GIS, the method for establishing the geo environmental spatial database and mathematical model for evaluating the adaptability of the geo environment to various types of urban land uses are put forward. Acity located in the Northwest China is taken as an example to demonstrate the effectiveness of the GIS approach and the proposed model. WT5,5BZ]Geo environmental assessment is an important tool in planning and site selection for human engineering activities. The characteristics of various types of urban land uses and criteria for evalnatin of the geo environment are discussed in this paper. A GIS aided geo environmental assessment for urban planning is proposed. by GIS, the method for establishing the geo environmental spatial database and mathematical model for evaluating the adaptability of the geo environment to various types of urban land uses are put forward. Acity located in the Northwest China is taken as an example to demonstrate the effectiveness of the GIS approach and the proposed model.
2000, 8(4): 432-432.
Abstract(2344)
WT5,5BZ]The population resettlement project is a key part of the Three Gorges Project on the Yangtze River. The geologial problem in the newly built Wushan County is a current focus of concern and contention in academic circles, and also a problem with population in the Three Gorges Reservoir region. The middle sector landslide, one of the landslides composed of T 2b 3 argillaceous limestone, occurred latest on the steep slope, has very complex structure, and low stability which is influenced by the later reworking and current resettlement construction. It is necessary to take strict treatment and control measures in resettlement construction process. WT5,5BZ]The population resettlement project is a key part of the Three Gorges Project on the Yangtze River. The geologial problem in the newly built Wushan County is a current focus of concern and contention in academic circles, and also a problem with population in the Three Gorges Reservoir region. The middle sector landslide, one of the landslides composed of T 2b 3 argillaceous limestone, occurred latest on the steep slope, has very complex structure, and low stability which is influenced by the later reworking and current resettlement construction. It is necessary to take strict treatment and control measures in resettlement construction process.
This paper studies soil slope by using rock structure controlling theory and preferred plane theory. The conclusion is that deformation and failure of soil slope are controlled by the preferred plane. This paper studies soil slope by using rock structure controlling theory and preferred plane theory. The conclusion is that deformation and failure of soil slope are controlled by the preferred plane.
The development of centrifugal model test (CMT), is firstly introduced in this paper. Then its application to slope engineering, especially to understanding the influence of rainstorm and reservoir impounding on slope stability, is discussed. In addition, the problems existing in the CMT are pointed, and some ideas for its further development are suggested. The development of centrifugal model test (CMT), is firstly introduced in this paper. Then its application to slope engineering, especially to understanding the influence of rainstorm and reservoir impounding on slope stability, is discussed. In addition, the problems existing in the CMT are pointed, and some ideas for its further development are suggested.
WT5,5BZ]The main hydro engineering environmental geologicalproblems arisen from the exploitation of coal resource in Yu shen fu Mine Area are analyzed. Based on the study the hydro engineering geological conditions, the results of desertification, soil and water erosion, water environment which will be affected by the coal mining in future in Yu shen fu Mine Area are predicted. Some technical methods and engineering measures for preserving water resource and undertaking coal mining are suggested in the paper. WT5,5BZ]The main hydro engineering environmental geologicalproblems arisen from the exploitation of coal resource in Yu shen fu Mine Area are analyzed. Based on the study the hydro engineering geological conditions, the results of desertification, soil and water erosion, water environment which will be affected by the coal mining in future in Yu shen fu Mine Area are predicted. Some technical methods and engineering measures for preserving water resource and undertaking coal mining are suggested in the paper.
We collected the information of landslide surface fissures and relative displacement of soil mass and anlysised the displacement time dynamic change as well as affecting factors. In combination with geologic structure of landslide, we predicted its development tendency from the displacement time information along the fissures. The result provides an information for correct design and regulate the landslide. We collected the information of landslide surface fissures and relative displacement of soil mass and anlysised the displacement time dynamic change as well as affecting factors. In combination with geologic structure of landslide, we predicted its development tendency from the displacement time information along the fissures. The result provides an information for correct design and regulate the landslide.
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The reactor zone of QinshanNaclear Power station in its third engineering stage is the research object in the paper. A random approach was taken to study the distribution regularities of joint cracks in rock masses due to their random characteristics. According to the attitude, spacing and length of the joint cracks, their probability distribution was deduced. Heterogeneity and orientation of the joint cracks were considered fully in this method. A non steady stochastic process is used to simulate the joint spacing, and an artificial joint network is generated by using Monte Carlo method. From the results of statistics and simulation, the joint cracks in rock masses in the reactor zone was assessed. The reactor zone of QinshanNaclear Power station in its third engineering stage is the research object in the paper. A random approach was taken to study the distribution regularities of joint cracks in rock masses due to their random characteristics. According to the attitude, spacing and length of the joint cracks, their probability distribution was deduced. Heterogeneity and orientation of the joint cracks were considered fully in this method. A non steady stochastic process is used to simulate the joint spacing, and an artificial joint network is generated by using Monte Carlo method. From the results of statistics and simulation, the joint cracks in rock masses in the reactor zone was assessed.
According to the layout, condition of pebble foundation and character of permeability of Bhote Koshi hydroelectric project head works in Nepal, the optimal design plan of impermeable wall determined and grouting curtain was by analysis of sensitivity about the depth of concrete impermeable wall, the length of grouting curtain and the permeability of concrete and foundation, and also three dimensional seepage calculation under the conditions of three reservoir water levels was carried out. The result will provide the basic data for the optimal design. According to the layout, condition of pebble foundation and character of permeability of Bhote Koshi hydroelectric project head works in Nepal, the optimal design plan of impermeable wall determined and grouting curtain was by analysis of sensitivity about the depth of concrete impermeable wall, the length of grouting curtain and the permeability of concrete and foundation, and also three dimensional seepage calculation under the conditions of three reservoir water levels was carried out. The result will provide the basic data for the optimal design.
Data of ground collapses and landslides caused by historical earthquakes are studied in this paper and a method for grading prediction of the collapses and landslides in West China is suggested. (1) Criteria for defining relationship between the maximum epicentral distance of landslides and earthquake magnitude; (2) A series of factors, such as geological and geomorphologic conditions, precipitation and seismic parameters, are carefully studied, zoned and quantified. The prediction method is examined in the case of Lijing earthquake induced landslides in Yunnan Province. Data of ground collapses and landslides caused by historical earthquakes are studied in this paper and a method for grading prediction of the collapses and landslides in West China is suggested. (1) Criteria for defining relationship between the maximum epicentral distance of landslides and earthquake magnitude; (2) A series of factors, such as geological and geomorphologic conditions, precipitation and seismic parameters, are carefully studied, zoned and quantified. The prediction method is examined in the case of Lijing earthquake induced landslides in Yunnan Province.
The conventional method for design of foundation pit supporting is reviewed. The basic principle of the elastic resistance method is explained. The definite answers to the problems of choice of soil pressure distribution mode and the displacement coordination for computing model of multi supporting sheet are given in the paper. The thinking and step for foundation pit supporting design with the elastic resistance method are interpreted with a practical example. The conventional method for design of foundation pit supporting is reviewed. The basic principle of the elastic resistance method is explained. The definite answers to the problems of choice of soil pressure distribution mode and the displacement coordination for computing model of multi supporting sheet are given in the paper. The thinking and step for foundation pit supporting design with the elastic resistance method are interpreted with a practical example.
Based on detailed field tests of liquefiable foundation of ligh speed highway reinforced with dry vibro gravel piles, the technology of reinforcement with dry vibro gravel piles and its compaction effect are discussed in this paper. The result shows that treatment of liquefiable foundation with the gravel piles has great advantage and the liquefaction potential reduced. Further, the author applied and confirmed the SASW method to be an effective and economic way to control the gravel pile composite foundation. Based on detailed field tests of liquefiable foundation of ligh speed highway reinforced with dry vibro gravel piles, the technology of reinforcement with dry vibro gravel piles and its compaction effect are discussed in this paper. The result shows that treatment of liquefiable foundation with the gravel piles has great advantage and the liquefaction potential reduced. Further, the author applied and confirmed the SASW method to be an effective and economic way to control the gravel pile composite foundation.
The thrusting force of landslide is the basic data for slope protecting works. In this paper, the authors modified the general Janbu method, considering a more reasonable force distribution and shearing failure mechanism. Its application shows that the modified method can give the position and magnitude of the thrusting force. In addition, increasing strength parameters of the landslide can reduce the thrusting force. The thrusting force of landslide is the basic data for slope protecting works. In this paper, the authors modified the general Janbu method, considering a more reasonable force distribution and shearing failure mechanism. Its application shows that the modified method can give the position and magnitude of the thrusting force. In addition, increasing strength parameters of the landslide can reduce the thrusting force.
This paper describes the characteritics of underground mining engineering, existing problems, and recent status, then an integrated engineering geological research method is suggested analysis integration application. The method was used in second mining zone of Jinchuan to predict risk of sudden instability of ore rock during extensive mining. This paper describes the characteritics of underground mining engineering, existing problems, and recent status, then an integrated engineering geological research method is suggested analysis integration application. The method was used in second mining zone of Jinchuan to predict risk of sudden instability of ore rock during extensive mining.
A thinking way to seismic monitoring and forecasting during construction and operation of Xiaolangdi Reservoir is suggested. The seismological works prior to empounding of the reservoir, during quiet seismic activity, reservoir induced earthquakes, and intensive near field earthquakes are considered. A telemeteric Seismic Network tends to be set on the Xiaolangdi Reservoir. A thinking way to seismic monitoring and forecasting during construction and operation of Xiaolangdi Reservoir is suggested. The seismological works prior to empounding of the reservoir, during quiet seismic activity, reservoir induced earthquakes, and intensive near field earthquakes are considered. A telemeteric Seismic Network tends to be set on the Xiaolangdi Reservoir.