检索结果-南通市图书馆

Tropical Clayey Sand Soil's Behaviour Analysis and Its Empirical Correlations via Geophysics Electrical Resistivity Method and Engineering Soil Characterizations

引用

International Journal of Geosciences 2012年第1期3卷 111-116页

作者： Andy Anderson Bery rosli saad Geophysics Section School of Physics Universiti Sains Malaysia Penang Malaysia

Soil is a heterogeneous medium which consist of liquid, solid, and gaseous phases. The solid and liquid phases play an essential role in soil spontaneous electrical phenomena and in behaviour of electrical fields, artificially created in soil. Soil electrical properties are the parameters of natural and artificially created electrical fields in soils and influenced by distribution of mobile electrical charges, mostly inorganic ions, in soils. Geophysical method of electrical resistivity was used for measuring soil electrical properties and tested in different soil studies. Laboratory tests were performed for the numbers of clayey sandy soil samples taken from Batu Uban area. The empirical correlations between electrical parameter, percentage of liquid limit, plastic limit, plasticity index, moisture content and effective soil cohesion were obtained via curvilinear models. The ranges of the soil samples are changed between 229 Ωm to 927 Ωm for resistivity (ρ), 6.01 kN/m2 to 14.27 kN/m2 for effective soil cohesion (C'), 35.08 kN/m2 to 51.47 kN/m2 for internal fiction angle (?'), 38% to 88% for moisture content (W), 33% to 78% for liquid limit (WL), 21% to 43% for plastic limit (Wp) and 11% to 35% for plasticity index (PI). These empirical correlations model developed in this study provides a very useful tool to relate electrical resistivity with effective cohesion, internal friction angle (strength), void ratio, porosity, degree of saturation, moisture content, liquid limit, plastic limit and plasticity index in context of medium-grained of clayey sandy soil that is, its fluid behaviours.

关键词： Empirical Correlations Regression Coefficient Resistivity Moisture Content Fluid Behaviours

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Correlation of Seismic P-Wave Velocities with Engineering Parameters (N Value and Rock Quality) for Tropical Environmental Study

引用

International Journal of Geosciences 2012年第4期3卷 749-757页

作者： Andy A. Bery rosli saad Universiti Sains Malaysia

The physical parameters of the subsurface from the environmental site investigation are important for geoscientists and engineers to understand and very low cost-effective method, especially when combined with geophysical (seismic) and geotechnical (borehole) surveys. These parameters can be estimated from other obtained parameters. In this study, P-wave velocities of materials (soils and rocks) are studied both in the laboratory and field measurement. The obtained P-wave velocities are then compared with the engineering parameters such N values, rock quality, friction angle, relative density, velocity index, density and penetration strength from boreholes. The empirical correlations were also found in this study for selected parameters. The estimation of engineering parameters from P-wave seismic velocity values is applicable for tropical environmental study. It is found that, the ratio (VFIELD/VLAB) when squared, was numerically close to the value of percentage RQD. We found that the empirical correlation for tropical environmental study is VP = 23.605(N) - 160.43 and the regression found is 0.9315 (93.15%). Meanwhile, the empirical correlation between P-wave velocities and RQD values is found as VP = 21.951(RQD) + 0.1368 and the regression found is 0.8377 (83.77%). The correlation between apparent P-wave velocities with penetration strength for both study sites are found as and the regression coefficient is found as 0.9756. Thus, this study helps for the estimation and prediction the properties of the subsurface material (soils and rocks) especially in reducing the cost of investigation and increase the understanding of the Earth’s subsurface characterizations physical parameters.

关键词： Geoscientists Geophysical N Value Rock Quality Environmental

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Clayey Sand Soil's Behaviour Analysis and Imaging Subsurface Structure via Engineering Characterizations and Integrated Geophysicals Tomography Modeling Methods

引用

International Journal of Geosciences 2012年第1期3卷 93-104页

作者： Andy Anderson Bery rosli saad Geophysics Section School of Physics Universiti Sains Malaysia Penang Malaysia

The geoelectrical resistivity and seismic refraction surveys which were used in this study on the test site, delivered a detailed image of the near-surface conditions in generally very good. Electrical resistivity and seismic refraction analysis proved that a combination of these integrated study of the physical environmental data provided a reasonable compromise between measurement time and image resolution. Quantitative interpretation of the resistivity and seismic models based on soil's parameters determined using laboratory practices and field survey could reproduce the range of resistivity and seismic values found on the site very well. The model explains the ambiguity in between resistivity and clayey sands found on the site and predict the dominant role of water saturation. Geophysical methods are used in this research in purpose to determine the internal structure of a soil mass. Various geophysical methods and their merits for imaging subsurface structures and condition are discussed. Seismic methods are often the most suitable because the measurements depend on the mechanical properties which are also important in the mechanical calculation of soil's behaviour analysis. Other geophysical method, such as geoelectric resistivity, is useful to determine the internal structure, but require a correlation of found boundaries with mechanical properties. This research was conducted to investigate the subsurface structures and conditions through geotechnical engineering properties and its geophysical characteristics. The computation analysis is used in this research in purpose to investigate clayey sand soil's behaviour. Electrical resistivity test and engineering laboratory practices such as soil strength test, liquid limit test, plastic limit test and grain size distribution test was also carried out to investigate clayey sand soil behaviour in Batu Uban, Penang area during monitoring period.

关键词： Geoelectrical Resistivity Seismic Refraction Soil's Behaviour Investigate Monitoring Period

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Application of Means of Least Squares Method（LSM） in Determination of Specific Physical Soil’s Behaviour of Tropical Clayey Sand during Fixed Period

Application of Means of Least Squares Method（LSM） in Deter...

引用

2012 Asia Pacific Conference on Environmental Science and Technology(APEST 2012)

作者： Andy A.B. rosli saad Geophysics Section School of PhysicsUniversiti Sains Malaysia11800 USMPenangMalaysia

Soil is a heterogeneous medium which consist of liquid,solid and gases *** solid and liquid phases play an essential role in soil spontaneous electrical phenomena and in behaviour of electrical fields,artificially created in soil.A method is worked out to determine the soil friction coefficient and specific adhesion for clayey sand *** specific effective cohesion,specific internal friction angle and specific resistivity of tropical clayey sand soils were determined in this *** order to determine the specific friction coefficient and specific adhesion of clayey sand soils,the soil slipping resistance should be assessed at several different values of pressure between the slipping *** direct shear test,resistivity test,soil’s consistency and atterberg limit tests were carried out in purposed to determine the physical characterizations of clayey sand *** on the basic of this opinion,by the means of least squares method（LSM）,the soil’s friction coefficient and specific adhesion together with specific effective cohesion,specific internal friction angle and their specific resistivity of tropical clayey sand soils is successfully *** research also systematically investigates the physical behaviour and their correlations of clayey sand soils properties during fixed period which potentially for hazard assessment.

关键词： Friction coefficient Specific cohesion Resistivity Least squares method Clayey sand.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Integration of Seismic Refraction and 2D Electrical Resistivity in Locating Geological Contact

引用

Open Journal of Geology 2013年第2期3卷 7-12页

作者： Nisa’ Ali rosli saad M. M. Nordiana Geophysics Section School of Physics Universiti Sains Malaysia Penang Malaysia

The aim of this research is to locate the geological contact for engineering purpose applying seismic refraction and 2D electrical resistivity method. Resistivity and seismic refraction method was conducted on four survey lines with 3 lines running from NW to SE which about parallel to each other and 40 m apart while the fourth line was running from SW to NE. The 2D resistivity survey used minimum electrode spacing of 5 m and the survey used pole-dipole array with minimum current was 2 mA and maximum was 20 mA. The seismic refraction survey used 5 m geophone spacing with offset shot was + 30 m and - 30 m. Resistivity results generally show the area was divided into two main zones, alluvium with resistivity value of 10 - 800 ohm-m, and granite bedrock with resistivity value of > 2500 ohm-m. There is a geological contact between granite and alluvium. The seismic results show the area consists of two layers. The first layer (top layer) with velocity of 460 - 900 m/s which was alluvium mixed with boulders. The second layer with velocity of 2060 - 3140 m/s with depth 71 - 90 MSL. The thickness of the overburden is 5 - 15 m.

关键词： Geological Contact 2D Electrical Resistivity Seismic Refraction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electrical Resistivity Survey in Bukit Bunuh, Malaysia for Subsurface Structure of Meteorite Impact Study

引用

Open Journal of Geology 2013年第2期3卷 34-37页

作者： Mark Jinmin rosli saad Mokhtar Saidin Andy A. Bery Centre for Global Archaeological Research Universiti Sains Malaysia Penang Malaysia Geophysics Section School of Physics Universiti Sains Malaysia Penang Malaysia

An electrical resistivity tomography (ERT) study was conducted at Bukit Bunuh, Lenggong Perak (Malaysia). The study is to justify the features and environmental subsurface geological structure which is due to the meteorite impact. The ERT survey used resistivity equipments comprises of 4 survey lines with 5 m electrode intervals, covering an area of approximately 64 km2. The survey lines were carried out using ‘roll-along’ technique. The data were processed and analysed using RES2DINV, Excel and Surfer software in order to produce electrical resistivity tomography for qualitative interpretations. The results show the variation of resistivity value and faults. The 2-D resistivity results generally show the study area was divided into two main zones, alluvium with resistivity value of 10 - 800 Ωm, and bedrock with resistivity value of > 1500 Ωm and depth of 20 - 40 m. There are lots of fractured zones which are different than normal, identified along the survey lines. The South-North line shows the fractured zones were identified at 760 - 3800 m and 4700 - 5900 m. The West-East line, the fractured zone was identified at 1545 - 6570 m and North-West to South-East line, the fractured zone was identified at 740 - 5850 m. Meanwhile, South-West to North-East line, the fractured zone was identified at 720 - 1520 m. These interesting results were indicated at position of longitude;100.965 - 100.978 and latitude;5.056 - 5.066 where the bedrock depth is 40 - 60 m MSL and highly fractured. The area was surrounded by high elevated bedrock. Integration of 2-D resistivity results with boreholes is successful give valid and reliable results. The results of the study indicate that these geophysical approaches have a capability of retrieving the meteorite impact subsurface of the studied area.

关键词： Resistivity Meteorite Impact Interesting Integration Successful

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Assessment on Excavatability in Weathered Sedimentary Rock Mass Using Seismic Velocity Method

引用

材料科学与工程（中英文A版） 2011年第2X期1卷 258-263页

作者： Mohamad Edy Tonnizam saad rosli Md Noor Muhazian Md Isa Mohamed Fauzi Department of Geotechnics and Transportation Faculty of Civil Engineering Universiti Teknologi Malaysia 81310 UTM Skudai.Johor Malaysia Universiti Sains Malaysia Penang Malaysia

Seismic refraction method is one of the most popular methods in assessing surface excavation. The main objective of the seismic data acquisition is to delineate the subsurface into velocity profiles as different velocity can be correlated to identify different materials. The physical principal used for the determination of excavatability is that seismic waves travel faster through denser material as compared to less consolidated material. In general, a lower velocity indicates material that is soft and a higher velocity indicates more difficult to be excavated. However, a few researchers have noted that seismic velocity method alone does not correlate well with the excavatability of the material. In this study, a seismic velocity method was used in Nusajaya, Johor to assess the accuracy of this seismic velocity method with excavatability of the weathered sedimentary rock mass. A direct ripping run by monitoring the actual production of ripping has been employed at later stage and compared to the ripper manufacturer’s recommendation. This paper presents the findings of the seismic velocity tests in weathered sedimentary area. The reliability of using this method with the actual rippability trials is also presented.

关键词：地震折射法岩体风化质量评估速度法沉积岩地震波速度地震数据采集合材料

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integration of Electrical Imaging Methods in Detecting Engineering Problems

Integration of Electrical Imaging Methods in Detecting Engin...

引用

2012 International Conference on Geological and Environmental Sciences

作者： A.H.A.Teh Saufia rosli saad M.M.Nordiana Geophysics Section School of PhysicsUniversiti Sains Malaysia

Geophysical prospecting is commonly used in solving engineering problems because of time saving,low cost and ***,among the other geophysical methods,the correlation between 2-D electrical imaging method and self potential method is rarely *** main objective of this study is to investigate the presence of saturated zone which causes several engineering problems in the area and leads to some damages such as soil settlements,piping effect and *** resistivity survey lines and two sites for self potential method were carefully chosen to cover the entire study *** resistivity results show the subsurface consist of saturated zones with depth of 5 to 20 m,and SP results shows water flowing towards different *** conclusion,correlation of two electrical imaging methods （active and passive） can be used in solving engineering problems as well.

关键词： Engineering problems geophysical prospecting self potential 2-D electrical resistivity

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Archaeological Structure Detection Using 3D GPR Survey in Jeniang,Kedah,Malaysia

Archaeological Structure Detection Using 3D GPR Survey in Je...

引用

2012 International Conference on Geological and Environmental Sciences

作者： Norhidayahti Mohd.Muztaza M.Mokhtar Saidin I.N.Azwin rosli saad Centre for Global Archeological Research Malaysia 11800 Universiti Sains Malaysia Geophysics Section School of Physics11800 Universiti Sains Malaysia

As a non-destructive method,geophysical techniques are very useful in archeology especially in detecting and mapping buried *** features could be acquired from different methods in geophysics depending on research *** its benefits to archaeology,the information from the geophysics data gives an advantage for archaeologist to plan for archeological research framework especially in optimizing the excavation *** penetrating radar （GPR） is one of the geophysical methods that utilizes electromagnetic waves to record relative position and shape of archaeological features in *** method was applied in detecting buried archaeological structure in Kampung Sungai Perahu Jeniang,*** with 3D interpretation managed to locate buried objects in KSP 1 study area at Jeniang,Kedah.

关键词： Site KSP 1 Jeniang 3D GPR survey archaeological structure

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

The Efficacy of Enhancing Horizontal Resolution （EHR） Technique in Shallow Subsurface Study Using 2D Resistivity Method at Bukit Bunuh

The Efficacy of Enhancing Horizontal Resolution （EHR） Tech...

引用

2012 International Conference on Geological and Environmental Sciences

作者： M.M.Nordiana rosli saad M.Mokhtar Saidin M.N.M.Nawawi I.N.Azwin Geophysics Section School of Physics11800 Universiti Sains Malaysia Centre for Global Archeological Research Malaysia 11800 Universiti Sains Malaysia

2D resistivity method is used to measure the apparent resistivity of *** study was conducted at Bukit Bunuh,Perak （Malaysia）,where EHR resistivity technique was developed in order to get detail and deeper penetration for shallow subsurface *** 2D resistivity results were compared between the survey line,with and without EHR *** survey used Pole-dipole array with 5 m minimum electrode *** results show the first zone with resistivity value of 10-800 ohm-m and thickness 5-60 m as alluvium consisting of boulders with resistivity value of ＞6000 *** second zone with resistivity value ＞20 000 ohm-m was *** penetration depth for 2D resistivity without EHR technique is 70m and with HER techniques is 140m with 5 m electrode spacing

关键词： Bukit Bunuh enhancing horizontal resolution (EHR) Pole-dipole subsurface 2D resistivity

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：