Japanese Geotechnical Society Special Publication最新文献

The international standardization and future work of the up-flow percolation test 上流渗流试验的国际标准化及今后的工作

Japanese Geotechnical Society Special Publication Pub Date : 2022-11-17 DOI: 10.3208/jgssp.v09.cpeg140

T. Yasutaka, H. Sakanakura

引用次数: 0

CONSTRUCTION AND DEMOLITION WASTE ILLEGAL DUMPING: ENVIRONMENTAL, SOCIAL AND ECONOMIC IMPACTS ASSESSMENT FOR A GROWING CITY 非法倾倒建筑和拆迁垃圾:一个发展中的城市的环境、社会和经济影响评估

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg133

N. Luu, L. Nguyen, T. Tran, Y. Isobe, M. Kawasaki, Kentaro Kawamoto

{"title":"CONSTRUCTION AND DEMOLITION WASTE ILLEGAL DUMPING: ENVIRONMENTAL, SOCIAL AND ECONOMIC IMPACTS ASSESSMENT FOR A GROWING CITY","authors":"N. Luu, L. Nguyen, T. Tran, Y. Isobe, M. Kawasaki, Kentaro Kawamoto","doi":"10.3208/jgssp.v09.cpeg133","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg133","url":null,"abstract":"Solid waste management causes a significant challenge for the developing countries, especially in Vietnam. With the rapid development of Vietnam’s economic and urbanization, the construction industry has gradually become one of pillar industries of the national economy in general and particularly Hanoi capital. While the construction industry has enjoyed continuous development, huge amounts of construction and demolition waste (CDW) being generated and dumped illegally on the vacant areas including roadsides, streets, and canals occur frequently. The consequences of improper waste management are potential alarming. With the rising concerns of waste management and global carbon concentrations, this research aims to evaluate the potential environmental impacts associated with CDW and to identify the best alternative in managing the CDW. Generally, the data are not homogeneous around the research area as the number of inhabitants is not constant nor it is the economic activity. There for if all the information is showed in thematic maps, the final waste management decisions can be made more efficiently. This study is performed with the aims of analysis on the current situation of CDW management in order to identify the environmental impacts related to CDW. Thereby, this research intended to be assessing CDW recycling potential and evaluating on the economic feasibility of the utilizing of recycled materials in the future. This paper combines the planning methodology to present the final results in thematic maps that make easier to interpret them. The results of the study would play the major role in developing a sustainable system such as assessing recycling potential, choosing appropriate treatment options, or operating solid waste management system.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"374 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126168738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Development of simple and environmentally friendly soil solidification technique 开发简单环保的土壤固化技术

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg120

Takamichi Nakamura, Eri Taniguchi, Daiki Kawamura, Yusuke Sakai

引用次数: 0

Coupled hydro-mechanical influence on hydraulic conductivity of well-graded sandy gravel 水-力耦合对分级好的砂砾石水力导电性的影响

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg088

Chenghao Chen, S. Mei, Yi Tang, Sheng-shui Chen

{"title":"Coupled hydro-mechanical influence on hydraulic conductivity of well-graded sandy gravel","authors":"Chenghao Chen, S. Mei, Yi Tang, Sheng-shui Chen","doi":"10.3208/jgssp.v09.cpeg088","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg088","url":null,"abstract":"In embankment dams and hydraulic structures, locally excavated sandy gravel is extensively used as the major rockfill material for its relatively low cost. As an increasing number of hydraulic buildings are designed with higher height and are constructed at steep valleys as well as turbulent waterways, the hydraulic conductivity performance of this building material becomes a vital parameter to evaluate the structure safety against seepage. This paper focuses on the changes of hydraulic conductivity induced by coupling effect of hydraulic load and mechanical behavior. Multi-stage hydraulic heads as well as various stress states are achieved by a newly developed apparatus to replicate infield sophisticated conditions. Sufficient specimen size is provided so that the well-graded test soil remains its natural gradation during constant water head permeability tests. The outflow of soil specimen was measured for each test. It is revealed that both the hydraulic and the mechanical effect result in a global decrease of gravelly material. A threshold of more than 6 MPa exists, indicating that the impact of further stress loading remains to a limited extent. In addition, no observation of obvious seepage failure illustrates that both hydraulic and mechanical loads are favorable to seepage prevention and corresponding countermeasures.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122120067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geotechnical characteristics of carbonated incineration bottom ash using exhaust and CO2 discharged from waste incineration facilities 利用垃圾焚烧设施排放的废气和二氧化碳进行碳酸化焚烧底灰的岩土特性研究

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg132

Fujikawa Takuro, Sato Kenichi, Koga Chikashi, Sakanakura Hirofumi, Kubota Hiroshi, Nagayama Yosuke

{"title":"Geotechnical characteristics of carbonated incineration bottom ash using exhaust and CO2 discharged from waste incineration facilities","authors":"Fujikawa Takuro, Sato Kenichi, Koga Chikashi, Sakanakura Hirofumi, Kubota Hiroshi, Nagayama Yosuke","doi":"10.3208/jgssp.v09.cpeg132","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg132","url":null,"abstract":"In Japan, approximately 4 million tons of incineration bottom ash (IBA) from municipal solid waste (MSW) are discharged a year. Since Japan does not have enough space to bury this material in landfills, it is necessary to reuse IBA. However, since bottom ash includes toxic material, immobilization is needed for effective use. This study is focused on carbonating treatments that immobilize bottom ash by exhaust gas (EG) and carbon dioxide (CO 2 ) generated from the Saga city incineration plant. In this incineration plant, CO 2 is separated and collected from EG generated when garbage is incinerated; this is Japan's first carbon dioxide capture and utilization (CCU) plant at a waste incineration facility. The mechanical characteristics and leaching properties of carbonated IBA for use as construction materials, such as base course or embankment materials are determined in tis study using the California bearing ratio (CBR) test, cone index, and leaching tests. As a result, it was revealed that carbonated IBA can be reused as a subbase course material. Also, the leaching concentrations of heavy metals from carbonated IBA were influenced by carbonating treatment processing and its immobilization effect was higher in CO 2 than in EG. It was also revealed that the concentration of lead meets the environmental quality standard values for soils set by the Japanese Ministry of the Environment.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129046354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

PVD-assisted consolidation of dredged sediments in a CDF: design of the test field pvd辅助疏浚沉积物在CDF中的固结:试验场的设计

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg092

M. Felici, E. Fratalocchi, M. Di Sante, Federica Pasqualini, E. Pasqualini

引用次数: 0

Characterization of Arsenic contaminated groundwater in Hanoi City and a treatment option by using recycled Autoclaved Aerated Concrete (AAC) 河内市地下水砷污染特征及循环蒸压加气混凝土(AAC)处理方案

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg130

S. Tran, N. Tran, H. Satoh, Kentaro Kawamoto

{"title":"Characterization of Arsenic contaminated groundwater in Hanoi City and a treatment option by using recycled Autoclaved Aerated Concrete (AAC)","authors":"S. Tran, N. Tran, H. Satoh, Kentaro Kawamoto","doi":"10.3208/jgssp.v09.cpeg130","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg130","url":null,"abstract":"Groundwater has been used as the main source of water supply in Hanoi City for more than a century. At present, 623,500 cubic meter of groundwater have been providing per day for urban districts. In recent years, groundwater pollution due to arsenic (As), iron (Fe), ammonia (NH3), and organic matters (OM) has been reported. This paper presents a review of As contamination in groundwater in Hanoi City and investigates the adsorption capacity by autoclaved aerated concrete (AAC) as a possible adsorbent for treating As contaminated water. Results showed that a high concentration of As which was up to above 800 μg/L was found in groundwater from the Southern region of Hanoi City and was associated with high concentrations of Fe, NH3, and OM. Based on the data of As and other water quality parameters, it was suggested that the degradation of OM and ferric (Fe(III)) oxyhydroxides played a role in the mobilization of As in groundwater under reductive condition. Batch and column filtration experiments using crushed grains of AAC were carried out to evaluate the treatment performance of heavy metals including As in contaminated groundwater. Especially, the column filtration experiments gave a high efficiency of metal removal (~ 100 %), implying that AAC could be a sustainable and low-cost media to treat heavy metals in wastewater.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130345131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Characterizing-water seepage damage in the chest-abdomen area of the Leshan Giant Buddha 乐山大佛胸腹区渗水损伤表征

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg087

S. Bo, Zhang Peng, Shen Xiwang, Li Yuyuan

{"title":"Characterizing-water seepage damage in the chest-abdomen area of the Leshan Giant Buddha","authors":"S. Bo, Zhang Peng, Shen Xiwang, Li Yuyuan","doi":"10.3208/jgssp.v09.cpeg087","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg087","url":null,"abstract":"The water seepage damage in the chest-abdomen area of the Leshan Giant Buddha is significant, which causes the sandstone in the body of the Buddha to corrode and crack, makes the repair materials on the surface of the Buddha hollow and desquamate, and leads to the growth of biological damage. In this study, continuous monitoring and sampling of the water seepage in the chest-abdomen area of the Leshan Giant Buddha and the atmospheric precipitation were performed. The water seepage in the chest-abdomen area of the Buddha is primarily controlled by atmospheric precipitation and evaporation. The hysteresis effect of water seepage reflects that the bedrock fissure on the left is relatively developed with significant water transmissibility. During the atmospheric precipitation monitoring period, the average pH of atmospheric precipitation was 8.13, i.e., weakly alkaline. After 2009, the annual average pH of atmospheric precipitation for the Buddha was greater than 5.6 and increased year by year. The water seepage of the Buddha contained a large amount of ions. The chemistry type of water seepage in the chest-abdomen ares is calcium carbonate (CaCO 3 ) and calcium sulfate (CaSO 4 ). Rock weathering contributes more than 90% of the ions in the Buddha water seepage. The microscopic analysis of the rock shows that the main components of the rock are CaCO 3 and SiO 2 , and there is obvious layered morphology, is easy to be dissolved in the presence of air and water. The composition of water chemical ions indicates that H 2 CO 3 and H 2 SO 4 are both involved in the process of the weathering of the sandstone.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114097037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Examining the effects of layering on the seismic behavior of tailings dams using dynamic centrifuge tests 采用动力离心试验研究了分层对尾矿坝抗震性能的影响

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg125

Zitao Zhang, Jing Hu, Xuedong Zhang, Leijing Qi, Jianhui Liang

{"title":"Examining the effects of layering on the seismic behavior of tailings dams using dynamic centrifuge tests","authors":"Zitao Zhang, Jing Hu, Xuedong Zhang, Leijing Qi, Jianhui Liang","doi":"10.3208/jgssp.v09.cpeg125","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg125","url":null,"abstract":"This study aims to examine the effects of layering on the seismic behavior of tailings dams. The focus is put on the spatial distribution of excess pore pressure and its variations with time during earthquake loading. In order to achieve this, dynamic centrifuge tests have been carried out for tailings dam models with thin silty layers sandwiched in sandy tailings. The experimental results demonstrate that dense sandy tailings can be contractive under cyclic loading, generating excess pore pressure. The flow of liquid upwards to the slope surface and the dissipation of excess pore pressure in the tailings can be inhibited or slowed by the overlying silty layer. The tailings covered by silty layers at shallower locations may exhibit a more pronounced increase in the ratio of excess pore pressure over initial effective vertical stress, leading to a more significant reduction in the stiffness and strength. This eventually may lead to liquefaction or failure of the slope. Those results can improve our understanding on the seismic behavior of tailings pond with thin silty layers, which is common in real mining projects.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"137 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130879440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A preliminary study of carbonate sand stabilization by bio-stimulation based MICP method 基于生物增产的MICP方法稳定碳酸盐砂的初步研究

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg039

Yijie Wang, Ningjun Jiang, Xiaole Han

引用次数: 1