Japanese Geotechnical Society Special Publication最新文献_第9页

Migration parameters and interaction of saline solutions through cement-bentonite cutoffs 盐溶液通过水泥-膨润土截流层的运移参数及相互作用

Japanese Geotechnical Society Special Publication Pub Date : 2021-10-12 DOI: 10.3208/jgssp.v09.cpeg093

J. Domizi, M. Felici, E. Fratalocchi

{"title":"Migration parameters and interaction of saline solutions through cement-bentonite cutoffs","authors":"J. Domizi, M. Felici, E. Fratalocchi","doi":"10.3208/jgssp.v09.cpeg093","DOIUrl":"https://doi.org/10.3208/jgssp.v09.cpeg093","url":null,"abstract":"The paper discusses the results of an experimental research on hydraulic conductivity, sorption, diffusion and long-term performance of cement-bentonite mixtures in saline sulphate solutions as a function of their composition and curing time. The results show that permeation with solutions of K 2 SO 4 can adversely affects the hydraulic performance of cement-bentonite mixtures depending on sulphate concentration and mixture composition. Choosing a very low permeable mixture at brief curing time is essential to limit adverse effects of interaction with SO 42- on the hydraulic performance. Linear isotherms were found to model sorption of K + , with distribution coefficients resulted not to be significantly influenced with curing, allowing testing, usefully and safely, at brief curing. Values of the distribution coefficient in the range of those of cement paste were obtained. On the contrary, diffusion coefficients of K + and of SO 42- higher than those documented in the literature for cement pastes were found. In designing cut-off walls the results point out the importance of selecting a mixture with very low hydraulic conductivity values at brief curing and of considering its specific diffusion coefficients, as well as interaction and sorption capacity.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"24 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":"127390736","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

Determination of the red bed soft rock’s apparent preconsolidation pressure 红层软岩表观预固结压力的测定

Japanese Geotechnical Society Special Publication Pub Date : 2020-03-14 DOI: 10.3208/jgssp.v08.c57

L. Lv, H. Liao, Li Song, Yingpeng Fu, Josephine Musanyufu

引用次数: 1

Development of the quick prediction method for the strength of ground improved by jet grouting 喷射注浆加固地基强度快速预测方法的研究

Japanese Geotechnical Society Special Publication Pub Date : 2020-03-14 DOI: 10.3208/jgssp.v08.j04

J. Yamanobe, M. Endo, K. Komiya

引用次数: 0

Evaluation of geotechnical properties of fused quartz for transparent material 透明材料熔融石英的土工性能评价

Japanese Geotechnical Society Special Publication Pub Date : 2020-03-14 DOI: 10.3208/jgssp.v08.c52

Huayang Lei, Min Liu, Zhai Saibei, Yingnan Liu, M. Jiang

{"title":"Evaluation of geotechnical properties of fused quartz for transparent material","authors":"Huayang Lei, Min Liu, Zhai Saibei, Yingnan Liu, M. Jiang","doi":"10.3208/jgssp.v08.c52","DOIUrl":"https://doi.org/10.3208/jgssp.v08.c52","url":null,"abstract":"Transparent soil surrogates permit nonintrusive three-dimensional deformational measurements in geotechnical model tests. Fused quartz saturated with a matched refractive index oil blend is an appropriate surrogate for natural sands. This paper carried out oedometer tests, consolidated drained (CD) triaxial tests and permeability tests on loose and dense oil-blend-saturated fused quartz. The geotechnical properties of compressibility, strength and permeability of the fused quartz were investigated experimentally and compared to those of natural sands and other transparent soil materials. An optimum transparency was obtained with a volume ratio of #15 white mineral oil and n-dodecane of 10:7.5 at room temperature. The dense fused quartz was less compressible with the coefficient of compressibility ( α 1-2 ) being 0.192 MPa -1 . The intrinsic permeability ranged from 18.7 to 31.5 darcys and the differences from the natural sands were ignorable. The peak friction angle ranged between 40.9 and 47.3°, which was within the typical range of sands. The test results show that fused quartz serves as an applicable surrogate in scaled model tests such as tunnel face stability experiments.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"66 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120896337","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

Numerical back-analysis and effective prediction of the long-term settlement of airport high fill 机场高填方长期沉降的数值反分析及有效预测

Japanese Geotechnical Society Special Publication Pub Date : 2020-03-14 DOI: 10.3208/jgssp.v08.c04

Jiangtao Huang, Ting Luo, Hongye Yan, Feng Chen, Qian-li Zhang

引用次数: 1

Study on the strength and deformation characteristics of loess under multi-staged unloading 黄土多级卸荷强度及变形特性研究

Japanese Geotechnical Society Special Publication Pub Date : 2020-03-14 DOI: 10.3208/jgssp.v08.c56

Yingpeng Fu, L. Yao, H. Liao, L. Lv, Yun-yan Tan

引用次数: 0

Effect of amorphous silica content in clay on mechanical properties of the mixture of clay and converter steelmaking slag 粘土中无定形二氧化硅含量对粘土与转炉炼钢渣混合料力学性能的影响

Japanese Geotechnical Society Special Publication Pub Date : 2020-03-14 DOI: 10.3208/jgssp.v08.j16

Yuka Kakihara, Y. Kikuchi, S. Noda, Takamune Yamaguchi, Risa Tomimatsu, Kosuke Nakayama, Tomotaka Yoshikawa

{"title":"Effect of amorphous silica content in clay on mechanical properties of the mixture of clay and converter steelmaking slag","authors":"Yuka Kakihara, Y. Kikuchi, S. Noda, Takamune Yamaguchi, Risa Tomimatsu, Kosuke Nakayama, Tomotaka Yoshikawa","doi":"10.3208/jgssp.v08.j16","DOIUrl":"https://doi.org/10.3208/jgssp.v08.j16","url":null,"abstract":"A mixture of dredged soil and steelmaking slag solidifies owing to the pozzolanic reaction between the silica and alumina in the dredged soil and the calcium in the steelmaking slag. Previous studies have reported that, for the same steelmaking slag, the concentration of dissolved silica and the shear strength of a mixture of dredged soil and steelmaking slag increases as the content of amorphous silica in the clay increases. However, the relationship between factors that affect solidification strength, such as the ratio of amorphous silica content and the humic acid content, and the solidification strength of a mixture of clayey soil and steelmaking slag has not been clarified. In this study, focusing on the ratio of amorphous silica contents in clay, clays containing different ratios of amorphous silica content were prepared by mixing kaolin clay and metakaolin. The unconfined compressive strengths of the clay mixed with steelmaking slag were measured. For the same curing time and up to an amorphous silica content ratio of 15%, the strength increases with an increase in the ratio. In addition, the shear strength develops earlier for higher content ratios of amorphous silica. Compared with studies on dredged soils mixed with steelmaking slag, the amorphous silica content ratio of the clay in this study was higher than that of dredged soils. However, the shear strength in the dredged soil with amorphous silica from diatoms and minerals mixed with steelmaking slag developed earlier than that of the clay with amorphous silica from minerals mixed with steelmaking slag. The differences in the development of shear strength can be attributed to the difference of the amorphous silica from minerals or that from diatoms.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127919750","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

Comparison between landslide thrust force on double-row and single-row stabilizing piles 双排和单排稳定桩的滑坡推力比较

Japanese Geotechnical Society Special Publication Pub Date : 2020-03-14 DOI: 10.3208/jgssp.v08.c35

Shiguo Xiao

{"title":"Comparison between landslide thrust force on double-row and single-row stabilizing piles","authors":"Shiguo Xiao","doi":"10.3208/jgssp.v08.c35","DOIUrl":"https://doi.org/10.3208/jgssp.v08.c35","url":null,"abstract":"It is significant in practical design that rationally analyzing and comparing the relationship in terms of magnitude between the sum of thrust in double-row piles and the thrust on single-row piles in large-scale landslide control project. According to the transfer coefficient method based on limit equilibrium principle, the sum of upslope thrust on double-row piles and upslope thrust on single-row piles, as well as the sum of net thrust upon double-row piles and net thrust upon single-row piles are analyzed and compared. Analysis results of practical examples show that the relationship between the sum of thrust on double-row piles and the thrust on single-row piles is closely correlated with the position of the rear piles, the ratio of resistance force in front of the piles over the thrust behind piles, and the load transfer factor of thrust between soil slices. If the rear piles are located at the resisting section of the slip surface, the sum of the upslope thrust on double-row piles is greater than the upslope thrust on single-row piles. If the entire slip surface is a plane, the sum of net thrust upon double-row piles does not exceed that on single-row piles.","PeriodicalId":283909,"journal":{"name":"Japanese Geotechnical Society Special Publication","volume":"275 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133542605","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

Effects of particle size on mechanical behaviors of calcareous sand under triaxial conditions 三轴条件下粒径对钙质砂力学行为的影响

Japanese Geotechnical Society Special Publication Pub Date : 2020-03-14 DOI: 10.3208/jgssp.v08.c54

Pei Cao, M. Jiang, Z. Ding

引用次数: 12

Numerical simulation of creep settlement for high railway foundations based on the UH model considering time effect 基于考虑时间效应UH模型的高铁地基蠕变沉降数值模拟

Japanese Geotechnical Society Special Publication Pub Date : 2020-03-14 DOI: 10.3208/jgssp.v08.c02

Wei Chen, Naidong Wang, Hongye Yan, Feng Chen, Qian-li Zhang

引用次数: 0