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05 November 2016, Volume 35 Issue S1 Previous Issue    Next Issue

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Enhancing Study of Shipping Development in Upper Reaches of Yangtze River for the National Strategy of “the Belt and Road ”and Construction of Yangtze River Economic Zone HUANG Zhendong 2016, 35(S1): 1-7.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.01 Abstract ( )   PDF (1009KB) ( )   The key points for the shipping development in the upper reaches of Yangtze River are elaborated, namely, establishing an integrated transportation system, making full use of various transportation means and enhancing channel improvement and maintenance. Then the key problems of artery channels in the upper reaches of Yangtze River are analyzed and the status quo and direction of the channel construction in the upper reaches of Yangtze River are introduced. Finally the directions of port and shipping supply improvement in the upper reaches of Yangtze River are pointed out and the goal for turning Chongqing into a shipping center in the upper reaches of Yangtze River is set. Issues of building channel to the outside world in the upper reaches of Yangtze River are put forth for study and exploration. References | Related Articles | Metrics

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New Development Tendency of Large-Span Reinforced Concrete Arch Bridges in China ZHENG Jielian 2016, 35(S1): 8-11.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.02 Abstract ( )   PDF (955KB) ( )   This paper has reviewed the technical progress, discussed the technical reasons, driving force and prospect of the rapid development of extra-large span concrete arch bridges with stiff skeleton and steel tube concrete arch bridges in China, and finally expounded the technical feasibility and engineering significance of the future construction of 700 m-span arch bridges. References | Related Articles | Metrics

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Hong Kong-Zhuhai-Macao Bridge Project Creative Management Practice GAO Xinglin, ZHANG Minggong, FANG Mingshan, DAI Jianbiao 2016, 35(S1): 12-26.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.03 Abstract ( )   PDF (5384KB) ( )   The project management and technological challenges facing Hong Kong-Zhuhai-Macao Bridg project based on its complex boundary conditions were introduced and their solutions were studied, according to its objectives and demands in combination with independent innovations and market sources; a new project management model was systematically established; technical obstacles confronting new technology, new construction techniques, new materials, new equipment and plant were overcome, so as gradually to approach its grand goal of construction by stages and at multi-levels, which discloses from one side the practical process of a “Powerful Nation of Bridges” and “Big Maker”. References | Related Articles | Metrics

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Theory and Practice of Desert “Soilization” for Ecological Restoration YI Zhijian 2016, 35(S1): 27-32.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.04 Abstract ( )   PDF (1690KB) ( )   Desert “soilization” is a rapid and effective technique to restore desert ecology, which is realized by enabling the surface layer of sand to acquire the eco-mechanical attributes of soil as well as the abilities to conserve water, nutrients and air, so as to serve as an ideal habitat for plant species. The mechanical principles and implementation methods of desert “soilization” were introduced,and the results of present experimental researches both in the simulated desert landform conditions and in actual desert were presented. References | Related Articles | Metrics

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Research Progress and Main Technical Issues of Three Gorges New Channel ZHANG Xujin, WU Peng, WANG Zhaobing，MA Xiqin 2016, 35(S1): 33-40.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.05 Abstract ( )   PDF (2107KB) ( )   As one of the world’s greatest hydro projects, the Three Gorges Project enjoys huge navigation benefits. With the steady growth of national economy and implementation of Yangtze River Golden Waterway, the cargo transportation volume through the Three Gorges Dam has increased steadily and exceeded the designed lock capacity of 100 million tons since 2011, and reached annual average of 120 million tons between 2013—2015, an excess of 20% over the designed capacity, which shows that the construction of a new channel through the Gorges is a must. This present paper briefly introduces the progress of that new channel, including the new lock construction scheme, expansion revamp of Gezhouba Dam, and major technical difficulties. References | Related Articles | Metrics

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Research of Sedimentation Model and Waterway Transit Capacity Improvement in the Three Gorges Reservoir YANG Shengfa, LI Wenjie, HU Xiaoqing, HU Jiang, WANG Tao 2016, 35(S1): 41-48.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.06 Abstract ( )   PDF (3054KB) ( )   After ten years’ operation，the actual sedimentation in the Three Gorges Reservoir (TGR) shows quite a difference from that estimated in demonstration phases due to the changes of incoming flow and sediment, which shows a great need improving its waterway transit capacity. The total sedimentation in the TGR is about 1.5 billion tons, which is mainly distributed at the wide and bend reaches in the permanent backwater region, and no cumulative sedimentation exists in the gorges, and the median particle diameter of the sedimentation is less than 0.01mm. Sedimentation of pebble is concentrated in the fluctuating backwater area, but the deposition amount is relatively small. Navigation obstacles caused by suspended sedimentation have taken place at Huanghuacheng waterway in permanent backwater region owing to the occurrence of bed load movement at some waterways in the fluctuating backwater area during the falling stage. Based on field measurements, mathematical models and physical models, a sedimentation model is proposed in the TGR, and has been successfully applied in the mathematical model and physical model of Huanghuacheng waterway. Based on the two-dimensional water-sediment mathematical model, it is concluded that the retrogressive sedimentation will be less than that expected, facilitating the waterway transit capacity improvement in fluctuating backwater area, and a preliminary treatment is put forward for the construction of the ‘4.5m-deep waterway’. References | Related Articles | Metrics

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Water Vapor Diffusion in Asphalt Mixtures LUO Rong, HUANG Tingting 2016, 35(S1): 49-60.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.07 Abstract ( )   PDF (1517KB) ( )   As shown by engineering cases of moisture damage to asphalt pavement in arid areas, moisture damage is an importance source in addition to water in liquid form and vapor. For the asphalt pavement serving in the environment of dynamic change of moisture , relative moisture gradient is one of the prime drives for vapor movement. In order to investigate the water vapor transport in asphalt mixtures under different relative humidity differentials, the water vapor diffusion test was performed on asphalt mixture specimens under different relative humidity differentials by use of Gravimetric Sorption Analyzer (GSA). The test results indicate that the total diffused mass of water vapor accumulated in the test specimen (M(∞)) is linearly proportional to the relative humidity differential and that the total diffused mass M (∞) increases with the increase of the relative humidity differential. It is also found that the diffusivity D of water vapor in the test specimen is inversely proportional to the relative humidity differential under water vapor pressure only. After being converted to standard atmosphere pressure, the diffusivity D and relative humidity moisture are in linear positive relationship, which indicates that the relative humidity differential increases with the linear increment of diffusivity D . References | Related Articles | Metrics

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Exploration and Practice of New Technology for Safety Monitoring and Evaluation of Large Bridges ZHOU Jianting, LAN Zhangli, LIANG Zongbao 2016, 35(S1): 61-71.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.08 Abstract ( )   PDF (2051KB) ( )   Influenced by such diversified coupling factors as natural disaster, overload and the natural deterioration of materials and structure owing to long-term service, the safety of large bridges in operation has become increasingly obvious. Research on bridge safety monitoring and evaluation technology based on modern information sensing technology has been much discussed in bridge research. Based on the massive monitoring data of bridge, the bridge safety assessment techniques based on the structural response envelope, time dependent reliability and deterioration effect have been proposed. To solve the misalignment between the long-life bridge and short-life sensors, the monitoring mode of “relay” has been put forth, and the life-long safety monitoring system of the bridge from construction period to the operation period has been established. A series of bridge monitoring devices with strong practicability have also been developed independently. Technologies and devices for the safety monitoring and evaluation of large bridges have been much applied to practice, and their effectiveness and practicality verified. References | Related Articles | Metrics

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Tibet Traffic Planning and Development of Science and Technology and Talent Demand in "13th Five-Year" Ciren Lamu, Cide Ji, WEI Qiang 2016, 35(S1): 72-78.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.09 Abstract ( )   PDF (931KB) ( )   The transport development current status in the “13th five-year plan” for the transport development plan of Tibet and the achievement obtained in the period of “12th five-year plan” were stated and the demand for science and technology, guiding thought, goal of development, important tasks and corresponding demand for talents were elaborated. Creation was made on the talent system so as to promote the sustainable healthy development of transport and science and technology in Tibet, and provide a powerful support for the development of Tibet transport development. References | Related Articles | Metrics

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Research on the Construction and Historic Values of 24 Zigs Along Guizhou-Yunnan Highway ZHANG Bo，WAN Yu ,LIU Yang，ZOU Renti 2016, 35(S1): 79-85.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.10 Abstract ( )   PDF (1123KB) ( )   The opening to traffic of Guizhou-Yunnan Highway, an important part of Nanjing-Yunnan Highway, indicated that east and southwest China had first been connected by modern highway. During China’s Resistance War Against Japan, Guizhou-Yunnan Highway served as a lifeline because it connected westward such international traffic lines as Yunnan-Burma Highway, Yunnan-Vietnam Railway, and Hump Airline, and eastward the then Capital of Chongqing and battlefields. As a classic project, its 24 zigs designed by Zou Yuesheng, has been a worldwide symbol for China’s greatest determination to resist Japanese agressors. References | Related Articles | Metrics

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Reminiscences of RANG Mingde,Pioneer of Sichuan-Tibet Highway and Founder of Chongqing Jiaotong University SHANG Ting, TANG Boming 2016, 35(S1): 86-92.  DOI: 10.3969/j.issn.1674-0696.2016.sup1.11 Abstract ( )   PDF (1345KB) ( )   RANG Mingde, founder of Chongqing Jiaotong University, joined the Chinese Red Army in 1931 and held the post of the political commissar of Sichuan-Tibet highway in 1951. To guarantee its timely opening to traffic, RANG led the survey and route selection himself and advocated technological innovations, and soon became an expert in quickening its building speed. RANG, by sharing the sufferings with the rest builders,overcame kinds of hardships and dangers, worked wonders in the history of road building of China and even the world.Such a great spirit is still worth our memory six decades later. References | Related Articles | Metrics