cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Evi Aprianti
Contact Email
eviaprianti93@yahoo.com
Phone
+6282387555381
Journal Mail Official
ialt_lti@unhas.ac.id
Editorial Address
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
Location
Unknown,
Unknown
INDONESIA
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 4 No 2, Dec (2002)" : 5 Documents clear
INVESTIGATION OF SHORT-TERM RUTTING PROCESS OF FLEXIBLE PAVEMENT SYSTEM WITH GEOGRID - REINFORCEMENTS BY HOMOGENIZATION METHOD B. B. Budkowska; J. Yu
Lowland Technology International Vol 4 No 2, Dec (2002)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This paper presents the investigations on short-term rutting that is developed in standard and geogrid-reinforced flexible pavement structure. The main source of the supporting experimental data acquisition on studied type of rutting was provided by laboratory records that had been published in technical literature. The experimental research focused on the development of clear grounds indicating that geogrid-reinforcement is the effective method of reduction of permanent deformations of the pavement system. The comprehensive discussion on the laboratory results showed that the placement of geogrid-reinforcement at various levels of base layer, generated different effects invarious parts of the pavement system. The numerical investigations are focused on determination of modulus of permanent deformation Ep for each layer contributing to the pavement structure. They are considered as being the functions of the number of load repetition N. The constutitutive law incorporated for this purpose is modified 3-D Hooke's law that involves the modulus of permanent deformations. The identification of Ep is-conducted in the framework of homogenization method which assumes the homogenity and isotropy of each layer. The fact of irreversibility of permanent deformations is taken into consideration by geometry's continous updating process. The determination of Ep requires full information on increments of permanent displacements of control points corresponding to each consecutive load repetition. The numerical investigations are performed for axisymetric geometry by means of the finite element analysis (FEA) program ABAQUS (1998). To guarantee the correctness of the results obtained, the problem that was explored was subjected to verivication studies by means of the KENLAYER (1993) program, that was suitably adjusted for this purpose.
APPLICATION OF ANN FOR RESERVOIR INFLOW FORECASTING USING SNOWMELT EQUIVALENT IN THE KARAJ RIVER WATERSHED H. R. Eslami; K. Mohammadi
Lowland Technology International Vol 4 No 2, Dec (2002)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Three different methods were used to predict the spring inflow into the Amir Kabir reservoir, which is located near Tehran, Iran. The spring inflow accounts for almost 60 percent of annual inflow to the reservoir. Utilizing the results of an artificial neural network (ANN) model, the inflow to Amir Kabir reservoir is predicted. It will be compared with two other methods: ARIMA time series and regression analysis between some hydroclimatological data and inflow. Using the thirty years of observed data proved that the ANN has a better performance than that the other methods have.
SEISMIC ANALYSIS SYSTEM OF BRIDGE PIER WITH PILE FOUNDATION IN ARIAKE SOFT CLAY REGION R. Mahmudur; G. Aramaki; Koga Katsuki; T. Ohtsuka
Lowland Technology International Vol 4 No 2, Dec (2002)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In our earlier paper which appeared in IALT, it is pointed out that design of bridge pier with big seismic loading needs special attention such as consideration of ground displacement, soil-pile interaction effect etc., when foundation pile penetrate through soft clay layer and ground displacement largely depends on soil shear wave velocity, Vs & strain dependence of G/G0. The Road Bridge Code in Japan states that shear wave velocity, Vs can be considered 50 m/sec in soft clay having SPT N-value zer. In this study, seismic analysis was carried out considering three cases: Case I using measured Vs value, Case II where Vs = 50 m/sec for all layers and Case III where Vs is calculated from the Railway Bridge Standard in Japan formula for the soft clay layer. Both of Penzien model and single input model analysis were performed. The bridge structure used in the analysis was first designedby Seismic Co-efficient Method and Ductility Design Method. In dynamic analysis, non-linear clasto-plastic material behavior was considered for piles. Lincar pile behavior case was also performed. In the former case rensponses mainly displacement and bending moment were found less compared to linear case. Responses in Case II were found much higher than other two cases and would result very uneconomical design. Penzien model analysis system, with non-linear pile material consideration is proposed for analysis of bridge pier with pile foundation in Ariake soft clay region. It is emphasized that Vs and also strain dependence of G/G0 be precisely measured in the soft clay region because of their big influence in seismic analysis in soft clay region. Difference between responses in Case I and Case III were found small. In the unavailability of measured data Vs may be calculated by the Railway Bridge Standard formula.
EFFECT OF DRAINAGE GALLERY DIMENSIONS ON THE UPLIFT FORCE OF A GRAVITY DAM M. A. El-Razek; M. M. A. Elela
Lowland Technology International Vol 4 No 2, Dec (2002)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Uplift pressure on the floor of the gravity dam affects the stability of the dam. Therefore minimazing the uplift pressure force can be achieved by constructing a drainage gallery. In the present work, three parameters of the drainage gallery are studied experimentally on a sand model of gravity dam to determine their effect on the total uplift force acting on the floor of the dam. These parameters are the diameter of the drainage gallery (d), spacing of the drainage gallery in the longitudinal direction of the dam (L), and the penetration depth (h). It is found that, the penetration depth of the drainage gallery is more effective in reducing the uplift force than the other two parameters. The average values of reduction in the uplift force attributed to the change of d, L, and h accounted to about 11%, 25%, and 40% respectively.
FIELD PROPERTIES AND SETTLEMENT CALCULATION OF SOIL-CEMENT COLUMN IMPROVED SOFT SUBSOIL - A CASE STUDY J. C. Chai; S. Y. Liu; Y. J. Du
Lowland Technology International Vol 4 No 2, Dec (2002)
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The unconfined compression strength, standard penetration test (SPT) results for soil-cement columns and the field loading tests results of the composite subsoil at Lian-Yun-Gang section, Xu - Lian expressway, China, were presented. The Methods for calculating the settlement of the soil-cement column improved soft subsoil were discussed. It is recommended that the stiffness of the "slab" on the top of the improved subsoil should be flexible "slab". the equilibrium method for the improved layer and the average stress method for the underlying unimproved soft layer are prefered, while in the case of a stiff "slab", the average modulus method for the improved layer and the combined method for the underlying unimproved layer are prefered. Finally, the settlements of the soil-cement column improved subsoil at Lian-Yun-Gang section were evaluated by the suggested methods and compared with the field data. The stress concentration ratio (n) is back-calculated, and it showed that n value increased with the increased of the area replacement ratio.

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2002 2002


Reset
Filter By Issues
All Issue Vol 24 No 4 (2024): Lowland Technology International Journal Vol 24 No 3 (2023): Lowland Technology International Journal Vol 24 No 2 (2022): Lowland Technology International Journal Vol 24 No 1 (2022): Lowland Technology International Journal Vol 23 No 4 (2022): Lowland Technology International Journal Vol 23 No 3 (2021): Lowland Technology International Journal Vol 23 No 2 (2021): Lowland Technology International Journal Vol 23 No 1 (2021): Lowland Technology International Journal Vol 22 No 4 (2021): Lowland Technology International Journal Vol 22 No 3 (2020): Lowland Technology International Journal Vol 22 No 2 (2020): Lowland Technology International Journal Vol 22 No 1 (2020): Lowland Technology International Journal - Special Issue on: Engineering Geology Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co Vol 21 No 3, Dec (2019) Vol 21 No 2, Sep (2019) Vol 21 No 1, June (2019) Vol 20 No 4, March (2019): Special Issue on: Green Technology for Sustainable Infrastructure Develop Vol 20 No 3, Dec (2018) Vol 20 No 2, Sep (2018) Vol 20 No 1, June (2018) Vol 19 No 4, March (2018) Vol 19 No 3, Dec (2017) Vol 19 No 2, Sep (2017) Vol 19 No 1, June (2017) Vol 18 No 4, March (2017) Vol 18 No 3, Dec (2016) Vol 18 No 2, Sep (2016) Vol 18 No 1, June (2016) Vol 17 No 4, March (2016) Vol 17 No 3, Dec (2015) Vol 17 No 2, Sep (2015) Vol 17 No 1, June (2015) Vol 16 No 2, Dec (2014) Vol 16 No 1, June (2014) Vol 15 No 2, Dec (2013) Vol 15 No 1, June (2013) Vol 14 No 2, Dec (2012) Vol 14 No 1, June (2012) Vol 13 No 2, Dec (2011) Vol 13 No 1, June (2011) Vol 12 No 1 (2010): Vol 12 No. 1, June (2010) Vol 12 No 2, Dec (2010) Vol 11 No 2, Dec (2009) Vol 11 No 1, June (2009) Vol 10 No 2, Dec (2008) Vol 10 No 1, June (2008) Vol 9 No 2, Dec (2007) Vol 9 No 1, June (2007) Vol 8 No 2, Dec (2006) Vol 8 No 1, June (2006) Vol 7 No 2, Dec (2005) Vol 7 No 1, June (2005) Vol 6 No 2, Dec (2004) Vol 6 No 1, June (2004) Vol 5 No 2, Dec (2003) Vol 5 No 1, June (2003) Vol 4 No 2, Dec (2002) Vol 4 No 1, June (2002) Vol 3 No 2, Dec (2001) Vol 3 No 1, June (2001) Vol 2 No 2, Dec (2000) Vol 2 No 1, June (2000) Vol 1 No 2, Dec (1999) Vol 1 No 1, June (1999) More Issue