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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Geosynthetic Society
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Journal DOI :
Korean GeoSynthetics Society
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Volume & Issues
Volume 11, Issue 4 - Dec 2012
Volume 11, Issue 3 - Sep 2012
Volume 11, Issue 2 - Jun 2012
Volume 11, Issue 1 - Mar 2012
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Competive Adsorption Characteristics of CFW on Cu and Zn
Han, Jung-Geun ; Kim, Dong-Chan ; Hong, Ki-Kwon ; Yoon, Won-Il ;
Journal of the Korean Geosynthetic Society, volume 11, issue 1, 2012, Pages 1~9
DOI : 10.12814/jkgss.2012.11.1.001
This paper describes the batch test results for application of CFW(Carbonized Foods Waste), which was produced by the process of recycling waste, in PRB system. It analyzed characteristics for individual adsorption and competitive adsorption of Cu and Zn in heavy metals. In individual adsorption, the Langmuir and Freundlich models are used to predict adsorption equilibrium. The adsorption equilibrium corresponded to the Langmuir`s and the maximum adsorption amount of Cu was greater than Zn`s. The removal of heavy metal is predicted that Zn was faster than Cu. The reaction rate of Zn based on Pseudo-first-order and Pseudo-second-order was faster than Cu`s, and the result of competitive adsorption test confirmed that the adsorption amount of Zn is reduced under similar condition for competitive adsorption rate of Cu and Zn. When Zn solution is mixed in Cu, Cu is adsorbed 86% on CFW. However, the adsorption of Zn is 19% on the contrary condition. Therefore, the removal characteristics of separate heavy metal should be considered for efficient treatment of contaminated ground based on complex heavy metal.
Suitability Evaluation of Lateral Earth Pressure for Design Diaphragm Walls applied to the Top-Down Construction Method
Hong, Won-Pyo ; Kang, Chul-Joong ; Yun, Jung-Mann ;
Journal of the Korean Geosynthetic Society, volume 11, issue 1, 2012, Pages 11~21
DOI : 10.12814/jkgss.2012.11.1.011
The Rankine(1857)`s earth pressure and the Hong and Yun(1995a)`s earth pressure was applied to analyze the lateral displacement of diaphragm wall applied to the Top-Down construction method using the computer program, which is a common design program for diaphragm wall. The lateral displacement estimated by the computer program was compared with the lateral displacement measured by inclinometer. The Rankine`s earth pressure has been widely used to design the diaphragm wall in the analysis of computer program. As the result of comparison, the lateral displacement of diaphragm wall was predicted differently according to the applied earth pressures. The behavior of lateral displacement predicted by the Rankine`s earth pressure was different with displacement measured by inclinometer and the lateral displacement at the bottom part was overestimated. However, the lateral displacement predicted by the Hong and Yun`s earth pressure is similar to the behavior and maximum value of real displacement. Therefore, the Hong and Yun`s earth pressure is more suitable than the Rankine` earth pressure to design the diaphragm walls applied to the Top-Down Construction Method.
Characteristics of Structure Settlement due to Urban Railway Construction on Reclaimed Land
Shin, Eun-Chul ; Rim, Yong-Kwan ; Park, Jeong-Jun ;
Journal of the Korean Geosynthetic Society, volume 11, issue 1, 2012, Pages 23~33
DOI : 10.12814/jkgss.2012.11.1.023
The stability of urban railway foundation can be a problem due to the excessive settlement. The settlement at the base of railway is monitored by the installed settlement gauges. The piezometer and pore water pressure measurement device are installed to measure the variation of pore water pressure and ground water table during the continuous pullout of sheet piles which were used for the braced cut. The settlement of railway is predicted with using the computer program CAIN RDA. The input data for the numerical analysis are obtained from the field soil exploration data and soil properties. The surcharged load from landscaping over the ground surface and the weight of train are taken into account for the estimation of settlement. As a result of numerical analysis, the range of settlement for six different Sites is from 5.94 cm to 12.77 cm. Thus, the settlement level at Site 2 is occurred 12.77 cm which is higher than the allowable settlement of 10 cm.
Dynamic Behavior Properties of Decomposed Granite Soil varying Content of Stone Sludge and Bentonite
Lee, Kang-Il ; Kim, Min-Jun ; Kim, Tae-Hoon ; Woo, Jong-Tae ;
Journal of the Korean Geosynthetic Society, volume 11, issue 1, 2012, Pages 35~45
DOI : 10.12814/jkgss.2012.11.1.035
Dynamic characteristics of decomposed granite soil mixed with stone sludge and bentonite were investigated to figure out adequate applications of stone sludge, A total of 16 specimens with different stone sludge contents of 0%, 5%, 10%, 15% and bentonite with 0%, 5%, 10%, 15% were prepared. Resonant column tests were carried out on each specimen at different confining pressure. The results showed that the optimum mixing ratio which can satisfy the maximum shear modulus and the minimum damping ratio of the decomposed granite soils ranges from 5% to 10% respectively.
A Study on Discharge Capacity of Vertical Drain Considering with In-situ Soil Condition
Park, Min-Chul ; Kim, Eun-Chul ; Lee, Song ;
Journal of the Korean Geosynthetic Society, volume 11, issue 1, 2012, Pages 47~56
DOI : 10.12814/jkgss.2012.11.1.047
Discharge capacity of PBD is sensitive in proportion to thickness and ground condition, and drainage of PBD declines due to disturbance effect in surrounding ground by mandrel used for vertical drainage setting and setting machines and type. Also, deviation of discharge capacity gets larger according to ground condition, construction condition and soil properties. But cause and analysis of those problems like reduced discharge of capacity and delayed dissipation of pore water pressure for discharge capacity is lack. Thus, in this text, ground improvement and discharge capacity is investigated by implementing composite discharge capacity test for analysis of an effect factor of PBD discharge capacity with in-situ ground condition. After fixing the vertical drain on a cylindrical cylinder, put churned sample into the cylinder. After in-situ ground and reclamation of ground are dredged, load following the loading step of 30, 70 and 120kPa using a pressure device. Result of the test, The discharge capacity was SM>ML>CL>CL(dredged soil) in situ condition and more fine-grained content, the amount of discharge was greater.
Application of Sand Mat Substitutel using Steel Slag
Park, Jong-Beom ; Lee, Byung-Chan ; Ju, Jae-Woo ; Na, Hyun-Ho ;
Journal of the Korean Geosynthetic Society, volume 11, issue 1, 2012, Pages 57~63
DOI : 10.12814/jkgss.2012.11.1.057
Steel slag has the nature to hydrate and expand when in contact with non-reacting CaO and water, and thus can be used only in limited scope for landfill disposal as well as for recycling as civil construction aggregates. In order to use such steel slags more efficiently, the applicability of steel slag as sand mat alternative material was reviewed. In general, sand mat is used in soft ground surface reinforcement method and horizontal drain method, and is installed simultaneously with soft ground vertical drain method. Therefore in this study steel slag designing method and application standard etc were examined to recycle steel slag as sand mat alternative material, and laboratory soil test and model test were done. Test results indicated that the designing method and application standard meet various environment and quality standards, meaning that steel slag can be utilized as sand mat alternative material, and analysis of slag mat bearing capacity also indicated that use of steel slag produces double or more bearing capacity compared with existing sand mat.
A Study on Practices and Troubles of Reinforced Soil Wall
Park, Jong-Kwon ; Lee, Kwang-Wu ;
Journal of the Korean Geosynthetic Society, volume 11, issue 1, 2012, Pages 65~75
DOI : 10.12814/jkgss.2012.11.1.065
Since the modem reinforced soil wall technology was introduced in domestic civil engineering society in the year 1980, the reinforced soil walls have been extensively used because these technologies have advantages such as economical efficiency, graceful appearance, and easy construction. This paper describes the application of reinforced soil wall, design criteria, and construction problems. Many cases of troubles, which include a severe deformation of facing, cracks of facing block, overall sliding failure and so on, have been reported. Inappropriate design and construction management mainly induce these problems. The technological level of design and quantity control for reinforced soil wall is not sufficiently supported to cope with the growth quantity of reinforced soil wall construction market and the increasing number of construction companies. The unified standard design and construction criteria of reinforced soil wall should be established with the detail consideration of overall performance and stability. The quality control of design and construction, and cost of construction must be seriously executed to construct a high quality of reinforced soil wall.