2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)最新文献

筛选
英文 中文
Variation Characteristics of Extreme Precipitation in the Shiwulihe River Basin in Hefei 合肥十五里河流域极端降水变化特征
Qiuyue Lian, Xuekai Chen, Xiaobo Liu, F. Dong
{"title":"Variation Characteristics of Extreme Precipitation in the Shiwulihe River Basin in Hefei","authors":"Qiuyue Lian, Xuekai Chen, Xiaobo Liu, F. Dong","doi":"10.1109/ICHCESWIDR54323.2021.9656429","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656429","url":null,"abstract":"Due to the influence of climate warming and human activities, extreme precipitation events occur frequently in various parts of the country. In order to reduce their negative impacts, the present study envisaged a systematic and comprehensive analysis of the variation characteristics in extreme precipitation of the Shiwulihe River Basin. Based on the daily precipitation data of the Shiwulihe River Basin in Hefei from 1960 to 2019, six extreme precipitation indexes such as RX1day, RX5day, R20 mm, R95P, SDII and CWD were selected. The variation characteristics in the extreme precipitation were analyzed using linear trend analysis, M-K non-parametric test, sliding T test, Morlet continuous complex wavelet analysis, and Pearson correlation analysis. The results reveal the time-varying characteristics of extreme precipitation in Shiwulihe River Basin.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123901183","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
Anti-overturning analysis of in-situ jacking foundation for 500KV high voltage transmission tower 500KV高压输电塔原位顶进基础抗倾覆分析
Tao Zhang, Yangsheng Zhang, Kong-liang Chen
{"title":"Anti-overturning analysis of in-situ jacking foundation for 500KV high voltage transmission tower","authors":"Tao Zhang, Yangsheng Zhang, Kong-liang Chen","doi":"10.1109/ICHCESWIDR54323.2021.9656365","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656365","url":null,"abstract":"Taking the 500 kV double-circuit transmission line jacking project as the background, aiming at the overturning phenomenon that may occur in the foundation of the high-voltage transmission tower jacking process, the finite element software is used to establish a three-tower six-line tower-line coupling system calculation model, considering the wires Numerical analysis of wind load response, self-weight effect of transmission tower, and tower-line coupling tension. The research results show that the y-direction bending moment value of each independent foundation will be significantly changed after the jacking, and the y-direction bending moment value of the sole base No. 2 will have a greater increase. In addition, the y-direction bending moment values of the upper and lower connecting beams cast in-situ after the transmission tower is lifted will suddenly increase, indicating that when the high-voltage transmission tower is lifted in situ, each foundation must be strengthened to avoid longitudinal restraints at the bottom of the foundation. Sudden instability of bending moment.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128639500","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
Comparative study on calculation methods of stress in different sections of gravity dam 重力坝不同断面应力计算方法的比较研究
Hui Yu, C. Su, Linna Zheng, Lili Zhu
{"title":"Comparative study on calculation methods of stress in different sections of gravity dam","authors":"Hui Yu, C. Su, Linna Zheng, Lili Zhu","doi":"10.1109/ICHCESWIDR54323.2021.9656233","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656233","url":null,"abstract":"In order to compare the difference between dam sections at different locations and different calculation models, this paper uses the material mechanics method, finite element independent dam section model and overall foundation model to compare different dam sections of gravity dams. The results show that for the riverbed dam section with a gentle foundation, the calculation results of the three methods are similar, and the vertical compressive stress difference at the heel of the dam is within 0.18 MPa. For the bank slope dam section, the calculation error of the material mechanics is relatively large. The vertical compressive stress at the heel of the dam is smaller than the result of the finite element method and can reach 4.67 MPa. The overall foundation model of the bank slope dam section has a larger tensile stress area, and the stress value increases up to 2.61 MPa. The vertical stress of the foundation surface of the bank slope dam section of the independent dam section model is the compressive stress, while the overall foundation model has tensile stress.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130489784","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
Time-variant seismic reliability analysis of slopes with combined uncertainties based on probability density evolution method 基于概率密度演化法的组合不确定性边坡时变地震可靠度分析
Hongqiang Hu, Gang Gan
{"title":"Time-variant seismic reliability analysis of slopes with combined uncertainties based on probability density evolution method","authors":"Hongqiang Hu, Gang Gan","doi":"10.1109/ICHCESWIDR54323.2021.9656212","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656212","url":null,"abstract":"Time-variant reliability are gaining much more popularity in geotechnical engineering due to the fact that the internal geotechnical parameters are change with the time and the external environmental excitation are random processes, which is of great significance in the service-life assessment, resilience-based assessment and intelligent disaster reduction. Considering that most existing studies of time-variant reliability analysis of slopes concentrated on the static conditions, which have neglected the time-varying behaviour of intensity and frequency of input seismic loading, the present study proposed an efficient probabilistic method for the time-variant reliability analysis of slope under the seismic loading, in which the combined uncertainties of spatially variable soil properties and the randomness of seismic loading are simultaneously considered. The time-dependent behaviour of seismic performance of slope under the no-stationary stochastic processes of seismic loading is revealed. The time-variant seismic reliability results and the probability density function of dynamic failure time are calculated by the proposed method. The results from the various intensities of input seismic loading, seismic performance criteria, seismic performance indexes and uncertainties are also compared in our study to illustrate the effect of different factors on the time-variant seismic reliability of slopes.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130442328","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
Research on Susceptibility Evaluation of Geological Hazards in Changyang County Based on Information Method 基于信息方法的长阳县地质灾害易感性评价研究
Mengsheng Yang, Mao Ye, Yi-dong Yu, Jianjun Wang, Qiang Liu, Zhiwen Zheng
{"title":"Research on Susceptibility Evaluation of Geological Hazards in Changyang County Based on Information Method","authors":"Mengsheng Yang, Mao Ye, Yi-dong Yu, Jianjun Wang, Qiang Liu, Zhiwen Zheng","doi":"10.1109/ICHCESWIDR54323.2021.9656484","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656484","url":null,"abstract":"With the gradual intensification of human engineering activities in Chinese mountainous and hilly areas in recent years, coupled with frequent occurrence of extreme weather, geological hazards are aggravated, posing a huge threat to the safety of people’s lives and properties. How to perform more accurate division of hazard-prone areas and guide local government in disaster prevention and alleviation is of vital importance. Research on susceptibility evaluation of geological hazards in Changyang County is carried out in this paper based on information method. The research findings show that high and extremely high-prone areas in the region are mainly distributed along the banks of Qingjiang River in Changyang County and the area of Geheyan Reservoir, while the medium and low-prone areas are mainly distributed in the surrounding areas of Ziqiu Town and Yazikou Township. The research results are able to guide the local government in disaster prevention and mitigation to some extent.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130593463","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
Strength test of steel slag powder - ground granulated blast-furnace slag powder - fly ash - cement solidified soft soil 钢渣粉-磨粒高炉渣粉-粉煤灰-水泥固化软土强度试验
Xuying Wang, Jianye Zhao, Lung-Chuang Wang, Qingjuan Meng, Qiang Li, Yuimin Xu
{"title":"Strength test of steel slag powder - ground granulated blast-furnace slag powder - fly ash - cement solidified soft soil","authors":"Xuying Wang, Jianye Zhao, Lung-Chuang Wang, Qingjuan Meng, Qiang Li, Yuimin Xu","doi":"10.1109/ICHCESWIDR54323.2021.9656200","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656200","url":null,"abstract":"The article replaces part of cement with SS, GGBS and FA to reinforce marine soft soil. Through the unconfined compressive strength (UCS) test, the SS-GGBS-FA-cement solidified soil and cement solidified soil were compared and analyzed. The study found that when m(SS): m(GGBS): m(FA) is 1:2:1, 28d and 90d SS1GGBS2FA1 + cement solidified soil has the highest strength, and exceeds that of single cement solidified soil. With the increase of GGBS content, the strength of solidified soil tends to increase. GGBS is more helpful to improve the strength of solidified soil, while the effects of SS and FA are not as good as GGBS. SS1GGBS2FA1 + cement solidified soil can significantly improve the strength of the soil and the strain characteristics during failure, and improve the brittle failure mode of cement soil.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124572729","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
Study on Water Saving Scheme of Thermal Power Plant Based on Water Balance Test 基于水平衡试验的火电厂节水方案研究
Jiawei Qian, Changle Shi
{"title":"Study on Water Saving Scheme of Thermal Power Plant Based on Water Balance Test","authors":"Jiawei Qian, Changle Shi","doi":"10.1109/ICHCESWIDR54323.2021.9656376","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656376","url":null,"abstract":"As a major industrial water user, thermal power plants have always been the focus of water-saving work. Through the analysis of two of the water balance test results of once-through cooling power plants along the lower reaches of the Yangtze River, it is found that the attention of enterprises to water-saving work have been significantly improved in recent years, but there is still a lack of professional and scientific water-saving methods. It is mainly reflected that in the unreasonable layout of water treatment system and the lack of pertinence of water-saving technical reform measures. These problems not only reduce the effectiveness of water-saving work, but also increase the economic burden of enterprises. By comparing the high water consumption systems of two power plants, excavation of he water-saving potential of enterprises in the water utilization, and the targeted water-saving measures are putting forward, which can provide reference for water-saving transformation of enterprises.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128384356","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
Seismic ground motion parameters for automatic seismic trip system of nuclear power plants 核电站地震自动跳闸系统的地震动参数
Liang Li, Luotao Wen, Rong Pan, Lin Gui, Kebin Fan
{"title":"Seismic ground motion parameters for automatic seismic trip system of nuclear power plants","authors":"Liang Li, Luotao Wen, Rong Pan, Lin Gui, Kebin Fan","doi":"10.1109/ICHCESWIDR54323.2021.9656386","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656386","url":null,"abstract":"After the Fukushima accident in Japan, the nuclear safety regulatory authorities of South Korea and other countries have required the installation of automatic seismic trip system (ASTS). In 2019, the National Nuclear Safety Administration issued the Seismic Design and Evaluation of NPPs (HAD102/022019), which specifies the role of seismic instruments in nuclear power plants (NPPs), including the role of ASTS. At the same time, it also puts forward relevant requirements on whether to install the ASTS. In 2019, China revised and issued Code for seismic design of nuclear power plants (GB 50267-2019), the seismic alarm index should be fully demonstrated. According to the investigation and study of the nuclear safety regulations and standards, and combining with the seismic level of NPPs site in China, this paper puts forward some suggestions on whether to set ASTS and the selection of ground motion parameters of ASTS.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126388084","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
Study on Vibration under the Water Pulsation of the High Head Pumped Storage Power Plant 高水头抽水蓄能电站水脉动下的振动研究
Baisong Nie, Dechang Guo, Qifeng Zheng, Wen-ke Xu
{"title":"Study on Vibration under the Water Pulsation of the High Head Pumped Storage Power Plant","authors":"Baisong Nie, Dechang Guo, Qifeng Zheng, Wen-ke Xu","doi":"10.1109/ICHCESWIDR54323.2021.9656340","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656340","url":null,"abstract":"The pump turbine of the pumped storage power station has the characteristics of high head, large capacity, high unit speed, two-way flow operation and frequent condition change, which leads to the prominent vibration problem. The rated head of a pumped storage power station is 710m, and the underground powerhouse is equipped with two kinds of pump turbines with different speeds (the rated speeds are 500r / min and 600r / min respectively). The rated head and the rated speed of 600r/min are the highest in domestic pumped storage power stations. In order to study the vibration characteristics of the power house structure under the action of water pressure pulsation of high head and high speed unit, the finite element dynamic time history method was used to study the vibration response of the power house under the assumption of harmonic load. The results show that the larger the amplitude of pressure pulsation is, the larger the vibration is. Under each working condition, the vibration response of stairs and turbine floor is relatively large, which is the weak part of the powerhouse structure. Under all working conditions, the vibration responses of the typical structures of 5# unit section do not exceed the allowable vibration standards of building structures specified in various codes. However, under case 1 and 4, the root mean square vibration accelerations of several parts of 5# unit section are relatively large, which exceed the safety standard (1.0 m/s2), but will not cause structural damage (< 10 m/s2). Although the frequency weighting RMS acceleration does not exceed the limit, obvious vibration and noise may appear due to the high vibration frequency, which should be paid attention to.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"05 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127138115","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
Research on excavation supporting measures for the dome of giant cylindrical surge chamber 巨型圆柱形调压室穹顶开挖支护措施研究
Jing Hou, Jun Chen, Yimin Chen, Guotao Meng, Fei Yang, Shaohu Ni, Jiangbo Meng
{"title":"Research on excavation supporting measures for the dome of giant cylindrical surge chamber","authors":"Jing Hou, Jun Chen, Yimin Chen, Guotao Meng, Fei Yang, Shaohu Ni, Jiangbo Meng","doi":"10.1109/ICHCESWIDR54323.2021.9656435","DOIUrl":"https://doi.org/10.1109/ICHCESWIDR54323.2021.9656435","url":null,"abstract":"The excavation and support of large underground caverns in a complex geological environment have brought great challenges to engineering design. The tailwater surge chamber of Baihetan Hydropower Station is a huge project with a maximum excavation diameter of 48 m. Geological factors including high stress, interlayer dislocation zone, and columnar joints impact the cavern's stability, making construction difficult. To investigate the cylindrical surge chamber dome's excavation and support technologies, as well as the stability of the surrounding rock, multiple methods have been applied, including empirical analogy, numerical calculation and field investigation. An excavation and support scheme of “high layered partition, horizontal sector partition, top-down, from inside to outside, area by area excavation and layer by layer support” has been proposed. The anchor observation tunnel in the shape of a “Wang” was innovatively designed. By presetting the new supporting structure of the anti-hanging dome through the anchor cable, the advanced implementation and monitoring of the support of the huge dome system have been accomplished. The research results are helpful to guide and optimize the subsequent excavation and support design of the cavern construction.","PeriodicalId":425834,"journal":{"name":"2021 7th International Conference on Hydraulic and Civil Engineering & Smart Water Conservancy and Intelligent Disaster Reduction Forum (ICHCE & SWIDR)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127215989","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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信