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Evi Aprianti
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International Association of Lowland Technology In Collaboration with Hasanuddin University and Saga University Address Faculty of Engineering, Center of Technology Building, 1st Floor Jalan Poros Malino km. 6, Bontomarannu, Gowa Indonesia Postal Code: 91711
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Lowland Technology International
Published by International Association of Lowland Technology
ISSN : 13449656     EISSN : 21878870     DOI : https://doi.org/10.0001/ialt_lti
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Transportation
The Lowland Technology International Journal presents activity and research developments in Geotechnical Engineering, Water Resources Engineering, Structural Engineering, Transportation Engineering, Urban Planning, Coastal Engineering, Disaster Prevention and Mitigation Engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 5 Documents
 1 
Search results for , issue "Vol 13 No 2, Dec (2011)" : 5 Documents clear
A CASE STUDY OF THE BEHAVIOR OF SOIL-NAIL SUPPORTED DEEP MIXED WALL IN THE SOFT DEPOSIT OF SHANGHAI L. Ma; S. L. Shen; Y. J. Du; W. J. Sun
Lowland Technology International Vol 13 No 2, Dec (2011)
Publisher : International Association of Lowland Technology

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Abstract

This paper presents a case study of an excavation retained by soil-nail supported deep mixed (DM) wall (DMSNW) in soft deposit of Shanghai, China. The soft deposit in Shanghai is Quaternary sediment with silt content over 50% and clay content of about 40%. The strength of this deposit is very low and the sensitivity is very high. In order to retain the excavation in the soft deposit, soil-nail supported DM wall is generally adopted when the excavation depth is less than 6 m. This paper presents an investigation on the interaction mechanism between nail and surrounding soil through a field case. A two-dimension finite element method (2D-FEM) was conducted. The effectiveness of 2DFEM is verified via comparing calculated DM wall displacement with the field measured value. Based on the FEM result, the importance of four key design factors, e.g. nail length, nail spacing, thickness of DM wall, and stiffness of DM wall, are discussed. The results indicate that FEM analysis is an efficient way to predict the displacement and internal force of nails. Finally, a design chart is proposed for the soil-nail supported DM wall used in excavation practice.
SPATIAL INFLUENCE ON HUMAN BEHAVIOR IN OPEN SPACE USING THE ENTROPY METHOD: A CASE STUDY OF CAMPUS COMMUNITIES IN HANGZHOU CITY, CHINA J. R. Shi; X. M. Zhao; H. Liu; K. Hokao; Z. Wang; J. Ge
Lowland Technology International Vol 13 No 2, Dec (2011)
Publisher : International Association of Lowland Technology

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Abstract

The rapid urbanization of Chinese cities has been resulting to the degradation of urban residential environments. As a representative of green areas, residential open spaces play key roles to balance the needs for both conservation and development. Traditional ways to observe resident’s behavior mode only by calculating the absolute population count is not perfect. In order to achieve the goal of public benefits, this study attempts to develop traditional behavior approaches to establish an unconventional determinant factor to enable the examination of temporal regulation, spatial distribution and activity category of residents’ behavior through the Behavior Entropy Index (BEI). Through this study, the author hopes to provide recommendations to interrelate the local view into planning process. The data was collected in 6 different residential areas and 4 campuses in Hangzhou. In sum, the result obtained from the study aiming to not only satisfy residents’ desire of the improvement of open space but also bring to professional’s attention by examining the diversity of user’s behavior in the context of residential open space utilization and finding out physical factors which influence their satisfaction and behavior. The samples can be hopefully extended to reasonably represent the overall situation of Yangtze River Delta and provide a valuable reference for other regions of China.
DEVELOPMENT OF SEDIMENT TRANSPORT MODEL AND ITS APPLICATION TO SONGKHLA LAKE BASIN S. Yoyrurob; W. Liengcharernsit
Lowland Technology International Vol 13 No 2, Dec (2011)
Publisher : International Association of Lowland Technology

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Abstract

In the past few decades, rapid population growth in Thailand has resulted in excess utilization of natural resources and degradation of environmental quality. Deforestation in sloping areas for agricultural and residential purposes has resulted in soil erosion from deforested areas with subsequent sediment transport and deposition in receiving water bodies. In order to evaluate the significance of this problem, a mathematical model is developed to simulate sediment transport phenomena in a receiving water body. In model development, total sediment transport is classified as bedload transport and suspended load transport, which result in two interrelated transport models. Threedimensional mass balance equation is used as a basic governing equation for suspended load transport model, whereas two-dimensional mass balance equation is used as a basic governing equation for the bedload transport model. The finite element method is used to solve these governing equations. Since sediment grain size and specific gravity are important factors affecting sediment transport either in the form of bedload or suspended load, the simulation models are developed for each group of sediment grain size and specific gravity, and then the simulated sediment concentrations of various groups are combined to obtain spatial distribution of total sediment concentrations at each time step. The inflow sediment along the boundary of water body is classified into corresponding groups based on their grain size and specific gravity. The developed model is applied to simulate sediment transport pattern in Songkhla Lake which is one of the most important water resources in Southern Thailand.
THE QUANTITATIVE RESEARCH ON 3-DIMENSIONAL SIMILARITY OF URBAN TEXTURE N. C. Xiang; B. F. Ting; C. L. Xiaojun; D. L. Jing
Lowland Technology International Vol 13 No 2, Dec (2011)
Publisher : International Association of Lowland Technology

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Abstract

Urban texture represents the city’s characteristics abstractly. Based on the study of city in three dimensional orientations and the figure-ground relation theory, an evaluation system on the building form in the city has been set up by bringing forward the conception of regional 3-dimensional (3D) density, 3D similarity, 3D contrast and regional spatial complexity. This paper is about 3D similarity as a part of the research series. The evaluation system describes the morphological distribution and the differences of scale between buildings in 6 sample sites through rational analysis using qualitative figures and quantitative calculations, verifying the consistency of quantitative calculation and experience.
ON USE OF DYNAMIC PROBING IN SANDY SOILS H. Abuel-Naga; A. Bouazza; M. Holtrigter
Lowland Technology International Vol 13 No 2, Dec (2011)
Publisher : International Association of Lowland Technology

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Abstract

The Dynamic Cone Penetration Tests (DCPT) is a rapid inexpensive field test that can be used to assess the compactness of soils. However, correlation between the results of DCPT and soil properties or any other trusted field test is not well established yet. In this paper, a General Method of Data Handling (GMDH) approach was utilized to investigate the correlation between Dynamic Probing Super Heavy (DPSH) and Standard Penetration Tests (SPTs) using test results obtained from an intensive site investigation study carried out on sandy soils in Egypt. Linking these two tests will enable DPSH to make use of well-established correlations between SPT and soil properties. The developed GMDH model indicates that the relation between the results of the two penetrometer tests is nonlinear for sandy soils and is a function of soil relative density and effective overburden pressure. The validity of the proposed correlation was verified using test results on sandy soils from different sites.

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