2011 International Conference on Electric Technology and Civil Engineering (ICETCE)最新文献_第9页

Notice of RetractionLand use/cover change and their driving forces in Nanchang 南昌市土地利用/覆被变化及其驱动力分析

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI: 10.1109/ICETCE.2011.5775301

Xifeng Yan, Zumin Qiu, Lusheng Guo

引用次数: 0

Studies on the temperature performance of SBR modified asphalt emulsion SBR改性沥青乳液的温度性能研究

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI: 10.1109/ICETCE.2011.5775944

Qinqin Zhang, W. Fan, Tiezhu Wang, G. Nan

{"title":"Studies on the temperature performance of SBR modified asphalt emulsion","authors":"Qinqin Zhang, W. Fan, Tiezhu Wang, G. Nan","doi":"10.1109/ICETCE.2011.5775944","DOIUrl":"https://doi.org/10.1109/ICETCE.2011.5775944","url":null,"abstract":"Styrene butadiene rubber (SBR) modified asphalt emulsions were prepared by means of SBR latex adding to aqueous solution, and it is an energy-saving, ecologically safe material because it does not need any heating processes creating gas emission and fire hazard during its use. The objective of this work was to analyze the temperature performance of SBR modified asphalt emulsions for enhancing the pavements properties. According to penetration index (PI) of emulsion residues, it was found that the temperature susceptivity of asphalt became lower by SBR modification, which was more favorable for practical application. And PI firstly increased and then decreased with the SBR content increasing, which was attributed to SBR content and whether it could disperse uniformly in emulsion residue. Furthermore, the increase of equivalent softening point (T800) of asphalt by SBR modification indicated that the thermal stability and the heat resistance of asphalt were significantly enhanced. Third, 5 °C ductility and equivalent brittle point (T1.2) was used for characterizing low-temperature property of modified asphalt. Compared to unmodified asphalt emulsion, the increase of low temperature ductility and decrease of T1.2 of modified asphalt emulsion demonstrated that anti-cracking performance was improved considerably. And the change of low-temperature ductility was related to the cohesion inside the emulsion residue and whether SBR could distribute uniformly in it. As a consequence, the optimum SBR latex content was determined as 4.0% to 5.0% to emulsion. In this concentration, the temperature performance of SBR modified asphalt emulsions was excellent and this favorable for application.","PeriodicalId":6340,"journal":{"name":"2011 International Conference on Electric Technology and Civil Engineering (ICETCE)","volume":"12 1","pages":"730-733"},"PeriodicalIF":0.0,"publicationDate":"2011-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88213982","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: 11

Study on numerical simulation of cup-shaped horizontal freezing reinforcement project near shield launching 盾构下水附近杯形水平冻结加固工程数值模拟研究

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI: 10.1109/ICETCE.2011.5776395

H. Jun, Y. Ping, Dong Zhao-wen, Cai Rong

{"title":"Study on numerical simulation of cup-shaped horizontal freezing reinforcement project near shield launching","authors":"H. Jun, Y. Ping, Dong Zhao-wen, Cai Rong","doi":"10.1109/ICETCE.2011.5776395","DOIUrl":"https://doi.org/10.1109/ICETCE.2011.5776395","url":null,"abstract":"Shield starting is an accident-frequent phase in the construction of shield tunnel. It is a key and urgent problem how to ensure the stability of reinforced soil in that phase. In this paper, the frequently adopted soil reinforcement methods at the shield tunnel end were summarized. Combining with the case of beginning project of shield acting at Suzhou Subway Yang Yu Xiang Station's west end, in which the application of cup-shape horizontal freezing method was planned to reinforce soil, the ADINA program was run to analyze the shield starting project, followed by the strength checking calculation. In addition, a special attention was placed on the displacement field and stress field under variable thickness of cup bottom in this project. The conclusion is as follows: a) For the soft soil areas, the most frequently used reinforcement approach is cement-soil deep mixing pile + high pressure rotary jet grouting pile; b)When subject to the environmental constraints or ground sand level with water, the cup-shape level freezing method can be employed to reinforce the soil; c) Numerical simulation showed that the extent of displacement was increasing along the boring direction of tunnel toward the cave gate after removing the sealed door. The maximum displacement is by 8.1 mm, occurring in the center of tunnel face; The maximum deformation of the surface occurred over the sealed door, subsiding by 3.1mm; d) The calculated strength of the cup-shaped reinforcement can meet the safety requirement. Difference of the displacement values and stress values from the variable effective thicknesses of the cup bottom is negligent. This reinforcement approach was feasible even if the effective thickness is 1.0m. In the end, the parameter values of the reinforcement approach at the beginning project of shield acting in Suzhou subway construction were proposed.","PeriodicalId":6340,"journal":{"name":"2011 International Conference on Electric Technology and Civil Engineering (ICETCE)","volume":"1 1","pages":"5522-5525"},"PeriodicalIF":0.0,"publicationDate":"2011-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88307629","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: 6

Mechanical behaviors of cemented-soil with Ca(OH)2 钙(OH)2对水泥土力学性能的影响

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI: 10.1109/ICETCE.2011.5776069

Xie Guo-liang, Shen Xiang-dong

引用次数: 0

Static behavior analysis of a new annular tensile cable-truss structure 新型环形张拉索桁架结构静力性能分析

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI: 10.1109/ICETCE.2011.5774628

Ma Guangying, Yao Yunlong

引用次数: 5

Driving forces of the water resource and the environment in Oasis region, China 中国绿洲地区水资源与环境驱动力研究

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI: 10.1109/ICETCE.2011.5774577

Lv Jiqiang, Shen Bing, Mo Shu-hong

引用次数: 0

The major engineering geological problems of Kunming urban underground space development and utilization 昆明城市地下空间开发利用的主要工程地质问题

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI: 10.1109/ICETCE.2011.5775273

Li Shibo, Fang Jianhua, C. Jianping

引用次数: 0

Effect of superposed deck on the static performance of a prestressed concrete hollow slab girder bridge 叠合桥面对预应力混凝土空心板梁桥静力性能的影响

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI: 10.1109/ICETCE.2011.5776542

Lei Zixue, SU Wenzhi

引用次数: 0

Adsorption properties of chromium (VI) on extracellular polymeric substances (EPS) 铬(VI)在胞外聚合物(EPS)上的吸附性能

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI: 10.1109/ICETCE.2011.5776119

Jinhua Tang, Guo-ren Xu, Guibai Li, L. Spinosa

{"title":"Adsorption properties of chromium (VI) on extracellular polymeric substances (EPS)","authors":"Jinhua Tang, Guo-ren Xu, Guibai Li, L. Spinosa","doi":"10.1109/ICETCE.2011.5776119","DOIUrl":"https://doi.org/10.1109/ICETCE.2011.5776119","url":null,"abstract":"The extraction of extracellular polymeric substances (EPS) from activated sludge and the absorption properties of chromium (VI) (Cr6+) on EPS were examined in this experiment. The effects of adsorption time, pH, mass of EPS, and initial Cr6+ concentration on Cr6+ removal efficiency were investigated. The results indicated that high speed centrifugation was efficient in the extraction of EPS and caused less damage to cells, meanwhile EPS extracted by this method was efficient in the adsorption of Cr6+. The adsorption reached equilibrium when the adsorption time was 240 min. The adsorption rate and the unit adsorption capacity were 50.83% and 19.06 mg g−1 EPS respectively. The optimal pH and mass of EPS were 6 and 400 mg L−1 on the condition that the initial Cr6+ concentration was 100 mg L−1. The adsorption rate declined with the rising of initial Cr6+ concentration, but the unit adsorption capacity increased. The results demonstrated that the EPS extracted from activated sludge would be applicable to removing Cr6+.","PeriodicalId":6340,"journal":{"name":"2011 International Conference on Electric Technology and Civil Engineering (ICETCE)","volume":"81 1","pages":"983-986"},"PeriodicalIF":0.0,"publicationDate":"2011-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86193546","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

Model test study of impact of pile length on long-short piles composite foundation 桩长对长-短桩复合地基影响的模型试验研究

2011 International Conference on Electric Technology and Civil Engineering (ICETCE) Pub Date : 2011-04-22 DOI: 10.1109/ICETCE.2011.5775233

X. Ge, X. Zhai, J. Xue, X. Bai

{"title":"Model test study of impact of pile length on long-short piles composite foundation","authors":"X. Ge, X. Zhai, J. Xue, X. Bai","doi":"10.1109/ICETCE.2011.5775233","DOIUrl":"https://doi.org/10.1109/ICETCE.2011.5775233","url":null,"abstract":"In order to study the impact of pile length on the bearing properties of long-short piles composite foundation, distribution of the axial force and skin friction along pile, the bearing mechanics of long-short-pile composite foundation with long and short piles were studied based on laboratory tests in three different conditions: 60-centimeter-long long piles with 20-centimeter-long short piles, 60-centimeter-long long piles with 30-centimeter-long short piles and 60-centimeter-long long piles with 60-centimeter-long short piles in this paper. Keeping the length of long piles 60 centimeters, conclusions were as follows: the axial force of long piles decreased a little with the increasing of short piles length and the axial force of short piles increased obviously with the increasing of short piles length; No matter how the length of short piles changed, long and short piles always followed the law that the value of axial force of corner piles were the largest, followed side piles and then center piles; The value of long and short piles skin friction both decreased with the increasing of short piles length; No matter how the length of short piles changed, long and short piles always followed the law that the utilization degree of the skin fiction of center piles were the largest, followed side piles and then corner piles.","PeriodicalId":6340,"journal":{"name":"2011 International Conference on Electric Technology and Civil Engineering (ICETCE)","volume":"49 1","pages":"2370-2374"},"PeriodicalIF":0.0,"publicationDate":"2011-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83688029","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