Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 351

会议视频 3

年份

2023 10

2022 24

2021 13

2020 16

2019 16

2018 14

2017 13

2016 8

2015 9

2014 13

2013 28

2012 22

2011 39

2010 29

2009 15

2008 17

2007 17

2006 5

2005 6

2004 9

展开︾

关键词

三峡工程 38

升船机 11

三峡升船机 10

设计 5

三塔悬索桥 4

混凝土 4

三峡库区 3

施工技术 3

裂缝 3

2021全球十大工程成就 2

三塔两跨悬索桥 2

三点弯曲梁 2

三相界面 2

三维 2

人工智能 2

低渗透 2

储层 2

储层预测 2

动力特性 2

展开︾

检索范围：

排序：展示方式：

Seasonal variation of nitrogen and phosphorus in Xiaojiang River—A tributary of the Three Gorges Reservoir

Zhe LI , Jinsong GUO , Man LONG , Fang FANG , Jinping SHENG , Hong ZHOU ,

《环境科学与工程前沿（英文）》 2009年第3卷第3期页码 334-340 doi: 10.1007/s11783-009-0039-y

摘要： A yearlong monitoring program in the backwater area of Xiaojiang River (XBA) was launched in order to investigate the eutrophication of backwater areas in tributaries of the Yangtze River in the Three Gorges Reservoir (TGR) in China, starting after the impoundment water level of the TGR reached 156 m. From March 2007 to March 2008, the average concentration of total nitrogen (TN) and total phosphorus (TP) were (1553 ± 484) μg·L and (62 ± 31) μg·L, respectively. The mean value of chlorophyll was (9.07 ± 0.91) μg·L. The trophic level of XBA was meso-eutrophic, while the general nutrient limitation was phosphorus. The results indicated that XBA has a strong ability to purify itself and has non-point source pollution from terrestrial runoff. The variation of TN/TP ratio was caused by a variation in TN rather than in TP when TN/TP<22. N-fixation from cyanobacteria occurred and became an important process in overcoming the nitrogen deficit under a low TN/TP ratio. When TN/TP ≥ 22, the variation of TP affected the TN/TP ratio more significantly than TN. The increase of TP in XBA was caused mainly by particulate phosphorus, which could originate from a non-point source as adsorptive inorganic forms after heavy rainfall and surface runoff. An increase in the river’s flow could also contribute to an unstable environment for the growth of phytoplankton.

关键词： Three Gorges Reservoir eutrophication nitrogen phosphorus seasonal variation chlorophyll

HTML PDF 收藏

三峡枢纽水库运行调度

张曙光,周曼

《中国工程科学》 2011年第13卷第7期页码 61-65

摘要：

三峡枢纽自2003年初步蓄水以来，工程建设进度、库区移民安置、地质灾害治理等较初步设计有所提前，泥沙淤积情况明显好于预期，三峡枢纽提前实现了分期蓄水目标。同时，随着运行条件的变化，三峡水库在汛限水位浮动、中小洪水调度、提前蓄水等方面进行了优化调度尝试，取得了较好的防洪、抗旱、航运、供水、生态等综合效益。尤其是2010年，汛期三峡水库实施了中小洪水调度，拦蓄洪量达到266亿m³，洪水资源利用充分；汛末采取了蓄水与汛期防洪运用相结合的方式，进一步利用汛末洪水资源，首次实现了175 m蓄水目标，枢纽开始全面发挥正常运行期的综合效益。

关键词：运行调度三峡枢纽

HTML PDF 收藏

长江三峡库区水库诱发地震的研究

李砰,李愿军,杨美娥

《中国工程科学》 2005年第7卷第6期页码 14-20

摘要：

中国长江三峡工程于2003年6月1日正式下闸蓄水，6月7日起突然在湖北省巴东县城北信陵镇沿江一线发生了2000多次密集的小震群，引起了大家的严重关切，在未来的几年内随着二期和三期工程的完工，水位将提高到156m和175m，是否会诱发更大更强的地震？根据地震构造的观点分析了库区东段几条活动断裂的分布、交汇关系和孕震能力，认为巴东和秭归可能为两个潜在震源区，蓄水后有引发5.5级左右的地震可能，地震烈度可达VII°～VIII°；并可能诱发库区内众多滑坡体的复活，导致严重的地质灾害。

关键词：长江三峡水库水库诱发地震地质灾害

HTML PDF 收藏

stability analysis of Bazimen landslide with monitored rainfall data and water level fluctuations in ThreeGorges Reservoir, China

Wengang ZHANG, Libin TANG, Hongrui LI, Lin WANG, Longfei CHENG, Tingqiang ZHOU, Xiang CHEN

《结构与土木工程前沿（英文）》 2020年第14卷第5期页码 1247-1261 doi: 10.1007/s11709-020-0655-y

摘要： Landslide is a common geological hazard in reservoir areas and may cause great damage to local residents’ life and property. It is widely accepted that rainfall and periodic variation of water level are the two main factors triggering reservoir landslides. In this study, the Bazimen landslide located in the Three Gorges Reservoir (TGR) was back-analyzed as a case study. Based on the statistical features of the last 3-year monitored data and field instrumentations, the landslide susceptibility in an annual cycle and four representative periods was investigated via the deterministic and probabilistic analysis, respectively. The results indicate that the fluctuation of the reservoir water level plays a pivotal role in inducing slope failures, for the minimum stability coefficient occurs at the rapid decline period of water level. The probabilistic analysis results reveal that the initial sliding surface is the most important area influencing the occurrence of landslide, compared with other parts in the landslide. The seepage calculations from probabilistic analysis imply that rainfall is a relatively inferior factor affecting slope stability. This study aims to provide preliminary guidance on risk management and early warning in the TGR area.

关键词： reliability analysis Bazimen landslide rainfall reservoir water level slope stability

HTML PDF 收藏

Probabilistic model for vessel-bridge collisions in the Three Gorges Reservoir

Bo GENG , Hong WANG , Junjie WANG ,

《结构与土木工程前沿（英文）》 2009年第3卷第3期页码 279-285 doi: 10.1007/s11709-009-0044-z

摘要： Based on a field observation on vessel transit path of three bridges over the Yangtze River in the Three Gorges Reservoir, and an analysis of the geometric probabilistic model of transiting vessels in collision probability calculation, the aberrancy angle and vessel velocity probabilistic model related with impact force, a probabilistic model is established and also verified by goodness-of-fit test. The vessel transit path distribution can be expressed by the normal distribution model. For the Three Gorges Reservoir, the mean and standard deviation adopt 0.2 and 0.1, respectively ( is the channel width). The aberrancy angle distribution of vessels accepts maximum I distribution model, and its distribution parameters can be taken as 0.314 and 4.354. The velocity distribution of up-bound and down-bound vessels can also be expressed by the normal distribution model.

关键词： vessel-bridge collision probabilistic model parameter statistics

HTML PDF 收藏

phosphorus accident pollution and emergency response study based on geographic information system in ThreeGorges Reservoir area

Aifeng Zhai, Xiaowen Ding, Lin Liu, Quan Zhu, Guohe Huang

《环境科学与工程前沿（英文）》 2020年第14卷第3期 doi: 10.1007/s11783-020-1223-3

摘要： A new algorithm of two-dimensional water quantity and the quality model was built. The migration and diffusion of TP was simulated. The emergency measures for sudden water pollution accidents was proposed. In recent years, sudden water pollution accidents in China’s rivers have become more frequent, resulting in considerable effects on environmental safety. Therefore, it is necessary to simulate and predict pollution accidents. Simulation and prediction provide strong support for emergency disposal and disaster reduction. This paper describes a new two-dimensional water quantity and the quality model that incorporates a digital elevation model into the geographic information system. The model is used to simulate sudden water pollution accidents in the main stream of the Yangtze River and Jialing River in the Chongqing section of the Three Gorges Reservoir area. The sectional velocity distribution and concentration change of total phosphorus are then analyzed under four hydrological situations. The results show that the proposed model accurately simulates and predicts the concentration change and migration process of total phosphorus under sudden water pollution accidents. The speed of migration and diffusion of pollutants is found to be greatest in the flood season, followed by the water storage period, drawdown season, and dry season, in that order. The selection of an appropriate water scheduling scheme can reduce the peak concentration of river pollutants. This study enables the impact of pollutants on the ecological environment of river water to be alleviated, and provides a scientific basis for the emergency response to sudden water pollution accidents in the Three Gorges Reservoir area.

关键词： Sudden water pollution accident Total phosphorus Predictive model Contaminant simulation Water scheduling Measure

HTML PDF 收藏

三峡库区生态补偿有关问题探讨

于洋,何立环,许人骥,吴国平,魏复盛

《中国工程科学》 2012年第14卷第11期页码 13-16

摘要：

针对国内生态补偿工作进展情况，以及三峡库区生态补偿政策实施情况，分析了近年来三峡库区生态补偿工作取得的成效以及存在的问题。在借鉴国内外先进经验的基础上，针对三峡库区实际情况进行了探讨，并对进一步完善三峡库区生态补偿政策、体制和机制提出了几点建议。

关键词：三峡库区生态补偿对策建议

HTML PDF 收藏

三峡工程移民安置规划与实践

石伯勋,尹忠武,王迪友

《中国工程科学》 2011年第13卷第7期页码 123-128

摘要：

长江三峡工程成败的关键在移民，移民搬迁安置顺利实施的保障是移民安置规划和有效的组织管理。移民安置规划及实施过程中，通过建立系统的法规、文件支撑体系，引入环境容量分析和资产评估方法，科学选址，准确把握移民补偿与地方发展之间关系，编制合理的迁建进度计划等；同时建立高效的管理体制和“静态控制、动态管理”的资金管理方式，根据实际情况变化适时依法调整规划等，顺利完成了移民搬迁安置任务，维护了库区社会稳定，促进了库区经济发展，推动了水利水电工程建设征地移民法规、规范、技术的发展和完善。还对移民安置理论、移民安置前瞻性工作进行了探讨。

关键词：三峡工程水库移民规划设计搬迁安置补偿与发展安置效果

HTML PDF 收藏

三峡水库综合利用调度关键技术研究与实践

刘丹雅,纪国强,安有贵

《中国工程科学》 2011年第13卷第7期页码 66-69

摘要：

为全面提升三峡工程的综合利用效益，三峡水库蓄水以来对规划设计的水库调度方式进行了优化研究与实践。文章对其关键技术进行分析总结，主要有协调防洪、发电、航运、供水和生态等多目标需求的技术、调度风险控制技术、调度决策优化技术、编制调度规程以规范调度工作等。通过分析以寻求不断完善三峡水库综合利用调度方式的路径，力求实现三峡工程效益最优，成为环境友好且对社会公益性贡献突出的跨世纪宏伟工程。

关键词：三峡水库综合利用优化调度决策风险控制

HTML PDF 收藏

长江三峡工程诱发地震监测研究

胡兴娥,秦小军

《中国工程科学》 2003年第5卷第11期页码 71-74

摘要：

随着长江三峡水库蓄水及蓄水量的变化，必将引起库坝地区局部介质受力状态、介质物理性质和区域应力场等的变化，从而可能诱发水库地震。为有效监测库区地壳变形、构造断裂的活动趋势、库盘沉降及水库诱发地震活动，在库坝区建立水库诱发地震监测系统是必要的。文章简要介绍了长江三峡水库诱发地震监测系统的建设情况。

关键词：三峡工程地震监测

HTML PDF 收藏

开县三峡水库淹没区泄水拦沙淤地还田工程方案研究

韩其为

《中国工程科学》 2003年第5卷第5期页码 31-34

摘要：

针对三峡水库开县淹没区淹没损失大，同时鉴于原研究的大防护方案被否定和分块小防护方案并不完全有效，提出了泄水拦沙淤地还田方案。方案如实现后可保护淹没耕地 2520hm²（3.78万亩），新增河滩地733.3 hm²（1.1万亩），能基本补偿开县全部淹没土地3353.3 hm²（5.03万亩）。该方案的指导思想具有新意，一方面是顺应流水的规律，不予堵截；另一方面又将泥沙看成一种资源，拦沙造地，抬高地面高程，便于修堤防护，而且将原土地改造成旱涝保丰收的良田，能做到长治久安。该方案造价低，效益好，而且具有一般性。

关键词：淹没区防护泄水拦沙淤地

HTML PDF 收藏

The Environmental Impact of the Three Gorges Project and the Countermeasures

You-mei Lu,Cun-liang Shang

《工程管理前沿（英文）》 2014年第1卷第2期页码 120-128 doi: 10.15302/J-FEM-2014019

摘要： The Three Gorges Project (TGP) is a landmark Chinese hydroelectric project with the goal of harnessing the Yangtze River and developing its water resources. Because of its enormous size and far-reaching influence, the project’s impact on the Yangtze River’s original ecological environment has been a concern to many people. This article examines the environmental effects of TGP with regard to reservoir-induced seismicity and bank stability, climate changes, sedimentation and bank erosion, the protection of aquatic species and water quality, and resettlement. Based on the operation monitoring data of TGP in 10 years (2003—2012), this article analyzes the tendency of reservoir-induced seismicity and bank stability, developing trend of sedimentation and bank erosion, the interplay between climate change and TGP, the distribution and cause of water contamination, the situation of aquatic species’ protection and living situation of resettled residents. At the same time, this article lists the comprehensive benefits of TGP in flood control, power generation, shipping, water supply, energy conservation and emission reduction. In the end, the authors deem that there is a dynamic and harmonious relationship between humankind and nature. The cognition about TGP will be progressed in practice, and harmonious relationship between the environment and TGP will be achieved through more practice.

关键词： the Three Gorges Project ecosystem aquatic species water quality flood control disaster alleviation energy saving emission reduction

HTML PDF 收藏

and Innovate Environmental Protection Measures, Promote Green Protection of Cultural Relics in the ThreeGorges Area

Fu-qing Liang,Yong-ping Sun

《工程管理前沿（英文）》 2014年第1卷第4期页码 330-335 doi: 10.15302/J-FEM-2014055

摘要： The subject is implementing and innovating environmental protection measures, and promoting green protection of cultural relics in the Three Gorges area. This thesis states its significance and effect in the beginning, and then summarizes seven pieces of main practice, includes five pieces of main effect. In the end, this thesis produces some relevant conclusions and suggestions about the subject.

关键词： environmental science the Three Gorges cultural relics innovate environmental protection measures green protection

HTML PDF 收藏

三峡库区水污染防治的关键在源头控制与削减

魏复盛,张建辉 ,何立环,王鑫,吴国平,丁中元

《中国工程科学》 2009年第11卷第2期页码 4-9

摘要：

分析了三峡库区水污染的主要原因，提出三峡水库水污染防治的关键是从源头严格控制和减少污染物产生量和排放量，指出水污染防治的根本途径是真正落实科学发展观，实现三大战略转变。对已受到污染的库湾和支流（水华）应采取源头控制、末端治理与生态修复相结合的措施。

关键词：三峡库区水污染防治源头控制战略转变

HTML PDF 收藏

Long-Term Performance and Microstructural Characterization of Dam Concrete in the Three Gorges Project

Chen Lyu,Cheng Yu,Chao Lu,Li Pan,Wenwei Li,Jiaping Liu,

《工程（英文）》 doi: 10.1016/j.eng.2023.04.017

摘要： This study investigates the long-term performance of laboratory dam concrete in different curing environments over ten years and the microstructure of 17-year-old laboratory concrete and actual concrete cores drilled from the Three Gorges Dam. The mechanical properties of the laboratory dam concrete, whether cured in natural or standard environments, continued to improve over time. Furthermore, the laboratory dam concrete exhibited good resistance to diffusion and a refined microstructure after 17 years. However, curing and long-term exposure to the local natural environment reduced the frost resistance. Microstructural analyses of the laboratory concrete samples demonstrated that moderate-heat cement and fine fly ash (FA) particles were almost fully hydrated to form compact microstructures consisting of large quantities of homogeneous C-(A)-S-H gels and a few crystals. No obvious interfacial transition zones were observed in the microstructure owing to the long-term pozzolanic reaction. This dense and homogenous microstructure was the crucial reason for the excellent long-term performance of the dam concrete. A high FA volume also played a significant role in the microstructural densification and performance growth of dam concrete at a later age. The concrete drilled from the dam surface exhibited a loose microstructure with higher microporosity, indicating that concrete directly exposed to the actual service environment suffered degradation caused by water and wind attacks. In this study, both macro performance and microstructural analyses revealed that the application of moderate-heat cement and FA resulted in a dense and homogenous microstructure, which ensured the excellent long-term performance of concrete from the Three Gorges Dam after 17 years. Long-term exposure to an actual service environment may lead to microstructural degradation of the concrete surface. Therefore, the retained long-term dam concrete samples need to be further researched to better understand its microstructural evolution and development of its properties.

关键词： Three Gorges Dam Long-term performance Microstructural analysis Moderate-heat cement Fly ash