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 383

会议视频 3

年份

2024 1

2023 12

2022 23

2021 14

2020 16

2019 15

2018 15

2017 16

2016 16

2015 7

2014 15

2013 28

2012 17

2011 52

2010 27

2009 16

2008 19

2007 17

2006 7

2005 8

展开︾

关键词

三峡工程 39

升船机 11

三峡升船机 10

大坝 8

三塔悬索桥 4

混凝土 4

三峡库区 3

施工技术 3

混凝土面板堆石坝 3

设计 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

关键技术 2

创新 2

动力特性 2

南京长江第四大桥 2

展开︾

检索范围：

排序：展示方式：

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

HTML PDF 收藏

三峡工程大坝设计

王小毛,徐麟祥,廖仁强

《中国工程科学》 2011年第13卷第7期页码 70-77

摘要：

三峡工程大坝为混凝土重力坝，坝顶高程185 m，最大坝高181 m，坝轴线全长2 309.5 m，分为泄洪坝段、厂房坝段、非溢流坝段、升船机坝段、临时船闸坝段、左导墙坝段和纵向围堰坝段。笔者着重从泄洪建筑物水力学、坝体分缝、电站引水压力管道布置及结构形式、坝基深层抗滑稳定、临时船闸封堵、坝基封闭抽排等方面对大坝结构设计进行了简要介绍。

关键词：三峡工程大坝设计

HTML PDF 收藏

长江三峡工程

张光斗

《中国工程科学》 1999年第1卷第1期页码 78-80

摘要：

举世瞩目的长江三峡工程是当代世界第一大水利工程。文章就国内外关注的三峡工程建设中有关泥沙淤积、库岸滑坡、诱发地震、枢纽工程技术、工程建设期间的导流与通航、大江截流、生态环境、工程效益等问题做了简明精要的阐述。

关键词：长江三峡工程淤积滑坡导流与通航

HTML PDF 收藏

三峡工程水工建筑物关键技术

钮新强

《工程（英文）》 2016年第2卷第3期页码 340-349 doi: 10.1016/J.ENG.2016.03.006

摘要：

三峡工程是治理和开发长江的关键性骨干工程，是当今世界最大的水利枢纽工程。其工程规模和综合效益巨大，工程技术复杂，设计难度超出了世界已建水利水电工程，在工程设计研究过程中提出并运用了一系列新的设计理论和方法，攻克了多层大孔口泄水重力坝、巨型机组水电站、高水头大型连续多级船闸等重要水工建筑物的多项关键技术难题。

关键词：三峡大孔口重力坝坝后背管变顶高尾水洞稳定拱全衬砌船闸

HTML PDF 收藏

长江三峡坝区地壳稳定性研究

李玶,李愿军

《中国工程科学》 2004年第6卷第6期页码 26-34

摘要：

长江三峡大坝座落于黄陵断块南端由闪长花岗岩组成的完整岩体上。黄陵断块作为中国内陆的次级板块具有典型的双层结构（结晶基底和沉积盖层），自印支运动形成以来一直呈持续、缓慢的整体抬升，断块除向东南轻微倾斜外，内部构造变形不明显。断块为多条活动构造所围限，其中近南北向的远安和仙女山两条深大断裂为主要强震发生带。远安断裂带为豫西、鄂西、湘西山地和南阳、江汉、洞庭盆地的一条区域性分界线，全长约1000 km，该断裂带历史上曾发生过两次6.5级地震（常德、南阳），两次地震震中相距约500km；仙女山断裂带沿香溪河向北延伸终止于青峰断裂，向南越过渔洋关后，形迹不明，全长达220 km，该断裂带具有发生6.0级地震的构造条件。大坝可能遭遇到的地震危险主要来自这两条强震发生带，对大坝的影响烈度预计为6°～7°，水平峰值加速度0.1～0.15g。

关键词：长江三峡大坝黄陵断块强震发生带地壳稳定性

HTML PDF 收藏

三峡大坝左厂3号坝段稳定性的数值分析和试验研究

任青文,余天堂,马良筠

《中国工程科学》 1999年第1卷第3期页码 41-45

摘要：

三峡大坝左岸1^#～5^#厂房坝段稳定性是工程的关键问题之一。采用弹塑性块体元法对3^#厂房坝段的稳定安全度进行了研究，块体单元法是一种以块体单元形心的刚体位移为基本未知量的数值分析方法，它可以精确和方便地模拟岩体结构面，能够较好地解决非连续介质的力学问题。它在稳定性分析方面的正确性被室内模型试验所证实，两者的结果相当一致。文章最后给出应用该法分析三峡大坝3^#厂房坝段在多种工况下的稳定性分析成果。

关键词：三峡大坝弹塑性块体单元法模型试验稳定性分析

HTML PDF 收藏

三峡工程坝址区主要工程地质问题研究

薛果夫,陈又华

《中国工程科学》 2011年第13卷第7期页码 51-60

摘要：

简要介绍了工程坝址区最为关键的坝基深层抗滑稳定、永久船闸高坡稳定、地下电站主厂房围岩块体稳定、断裂构造等几个工程地质问题研究过程、方法、工作内容及基本结论，并结合工程施工、监测及运行有关情况对各专题进行全面总结与评价。

关键词：三峡坝区工程地质问题勘察研究总结

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

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

三峡工程对葛洲坝枢纽下游近坝段水位与航道影响研究

陆永军,陈稚聪,赵连白,邵学军,杨美卿,李云中

《中国工程科学》 2002年第4卷第10期页码 67-72

摘要：

根据实测地形和水文泥沙资料，分析了葛洲坝枢纽运用后宜昌河段的河床冲淤变化、推移质和床沙的粗化以及枯水位的变化。由数学模型计算和物理模型试验成果，预测了三峡工程施工期及初期运用阶段葛洲坝枢纽近坝段水位下降及对通航的影响。

关键词：葛洲坝枢纽三峡工程冲刷水位下降船闸与航道数学模型物理模型

HTML PDF 收藏

三峡水利枢纽二期工程科技和管理创新

戴会超,曹广晶

《中国工程科学》 2005年第7卷第1期页码 50-59

摘要：

三峡工程规模巨大、技术复杂，针对重大技术难题，汇集全国科技精华，充分发挥专家的作用，展开科技攻关，并借鉴国外先进经验，科学决策。2003年6月1日水库开始蓄水，6月10日水位到达135 m高程，6月16日双线五级船闸试通航成功，左岸电站首批水轮发电机组从7月份开始投产，到2003年底已有6台机组正式并网发电。三峡工程已经顺利地实现了蓄水、通航、发电的二期工程建设目标。在枢纽总布置及大坝工程、水电站工程、双线连续五级船闸、特大型水轮发电机组、导截流及围堰工程和特大型工程管理技术研究及实践方面，取得了一系列重大突破。

关键词：三峡水利枢纽大坝水电站船闸截流工程管理

HTML PDF 收藏

工程建设管理的实践——以三峡工程为例

陆佑楣

《中国工程科学》 2008年第10卷第12期页码 17-23

摘要：

论述了工程项目管理的三阶段划分的普遍意义。工程项目管理既有普遍的规律，也有各自的个性，因此无须强调工程管理的固定模式。应该坚持从实际出发，科学地进行管理，创造各自的管理特色。以三峡工程为例论述了工程建设和管理的实践。

关键词：长江三峡工程工程项目管理三峡总公司

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