China Harbour Engineering Company Ltd

Beijing, China

China Harbour Engineering Company Ltd

Beijing, China

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Zhang L.Z.,Harbin Institute of Technology | Chen T.L.,China Harbour Engineering Company Ltd | Xiong W.,Harbin Institute of Technology
Applied Mechanics and Materials | Year: 2013

Large span self-anchored suspension bridges which are located in the strong earthquake zone often have no sufficient anti-seismic capacity, especially the bridge pylon. Therefore, seismic response control is necessary. This paper studies the lateral damping control effects of one large-span self-anchored suspension bridge with tuned mass damper (TMD). Using a spatial dynamic analysis finite element mode, the seismic responses are calculated out. Seismic response analysis results show that a large lateral displacement appeared at the pylon top under the lateral seismic action and the moment peak at the pylon bottom is nearly reaching its equivalent yield moment gotten by moment-curvature curve, which would be resulted in a high risk of collapse of self-anchored suspension bridge under lateral earthquake action. Therefore, one TMD is considered to be applied on the pylon top of the self-anchored suspension bridge to reduce the seismic response. The simulation result shows that the TMD can provide remarkable effect on seismic response control of the pylon. The control efficiency of TMD can be up to 23.4%. The moment at the pylon bottom and the displacement at the pylon top both decrease obviously. The parameter analyses of TMD are also performed to get the best design parameter. The research results can be used as the reference of seismic response control or anti-seismic design for the same type of bridge. © (2013) Trans Tech Publications, Switzerland.


Zhai X.,China Harbour Engineering Company | Liu A.M.M.,University of Hong Kong | Fellows R.,Loughborough University
Journal of Management in Engineering | Year: 2014

While previous studies have found that human resource management has positive effects on innovation and organizational performance, the processes through which human resource management leads to organizational performance are contested. Although human capabilities in learning, innovating and changing creative directions are vital to long term development of organizations, it has been suggested that intellectual capital, knowledge sharing, and group interaction mediate that process. In the context of the Chinese construction industry, this paper investigates the effect of human resource practices and organizational learning on construction firms' performance. The data collection employs a questionnaire survey and structural equation modelling is used to analyse the data. The results support organizational learning as a mediating variable of the relationship between human resource practices (staffing, training, rewards, and employment relations) and organizational performance. Thus, Chinese construction firms should view organizational learning as an important component of competitive advantage in the process of organizational development, and enhance organizational learning by furthering their human resource practices. © 2013 American Society of Civil Engineers.


Jian C.,Beijing University of Civil Engineering and Architecture | Zhongqi Y.,University of Hong Kong | Sijing L.,China Harbour Engineering Company Ltd
Applied Mechanics and Materials | Year: 2012

In Hong Kong, there are so many drill works for landslide prevention, such as drilling holes for soil nailing. To recognize the geotechnical condition of slope in detail based on these drill holes, we have developed and invented the drilling process monitoring (DPM) technique to accurately and quickly quantify and characterize the mechanical strength distribution beneath the slope surface. This technique is associated with the conventional air-driven rotary-percussive drilling machines with down-the-hole hammer. This drilling machine is manually portable to quickly form holes of upto 100 m deep in sloping ground. Such ground can comprise any kinds of geomaterials from soft or loose geomaterials such as caverns, clay or sand to extremely hard or strong geomaterials such concrete or granite. Therefore, we have proposed an innovative approach by using DPM method to accurately and quickly quantify the ground conditions in slopes in mountainous regions. It is trusted that the proposed approach will be able to upgrade our current slope engineering practice in mountainous regions. © (2012) Trans Tech Publications, Switzerland.


Chen J.,China Harbour Engineering Company | Yue Z.Q.,University of Hong Kong
International Journal of Rock Mechanics and Mining Sciences | Year: 2015

In this article, we conducted in-situ rotary-percussive instrumented drilling monitoring and associated data analysis in parallel to determine weathering grades of rock mass and their corresponding spatial distribution. The influence of the mechanism of percussive drilling on the variations of drilling parameters is discussed. Three kinds of breaking actions in percussive drilling were summarized based on over 600 monitored soil nail holes. On the basis of breaking action identification, we propose a new breaking-action-based zoning analysis to remove the variations of drilling parameters caused by percussive drilling itself, only leaving the rock-dependent variations. In a case study, we verified the ground characterization results using this methodology with two sets of parallel drillhole loggings. The comparison results showed that this methodology offers great potential in ground characterization. © 2015 Elsevier Ltd.


Yu T.,Ocean University of China | Yu T.,Tianjin University | Lian J.,Tianjin University | Shi Z.,Tianjin University | And 2 more authors.
Ocean Engineering | Year: 2016

In recent years, local scour has received attention because it may have a negative effect on coastal structures. Because of the large-scale arc transition and other special constructs, flow patterns around composite bucket foundation are complicated, and the local scour around composite bucket foundation has rarely been reported in the literature. In the present study, a detailed laboratory testing program on model with diameters of 150 cm and 75 cm embedded in silty sand was conducted in a flume. The scouring process and equilibrium scour hole geometry under steady and bidirectional current were investigated in detail. A procedure was suggested to predict the ultimate scour depth based on the observed variation of the scour depth over a limited time period. The equilibrium scour depth under a bidirectional current was approximately 16% less than that under a steady current, and there were two spoon-shaped scour holes in the steady current scour, whereas four saddle-shaped scour holes were discovered in bidirectional current scour. Based on these results, a functional relationship was suggested between the scour depth and other parameters, such as the diameter of the foundation, Shields parameter and median diameter of the soil bed. © 2016 Elsevier Ltd. All rights reserved.


Geng B.L.,Transportation Institute | Zheng X.,China Harbour Engineering Company Ltd
Applied Mechanics and Materials | Year: 2013

By taking the 3D Laplace equation as the basic governing equation, a mathematical model with respect to the interaction between linear waves and arbitrary 3D structures was founded. For the example of wave action with three cylinders, numerical results show that wave force Fx decrease and wave force Fy increase in each cylinder by incident wave direction from 0° to 60° wave height on origin point increases with incident wave direction increasing for given layout and incident wave conditions. © (2013) Trans Tech Publications, Switzerland.


Zhong Z.,Shaoxing University | Zhong Z.,Pennsylvania State University | Gao H.-C.,Shaoxing University | Xie C.-F.,China Harbour Engineering Co.
Yantu Lixue/Rock and Soil Mechanics | Year: 2015

A coupled model including the combination of pressure solution model and stress corrosion model is proposed to simulate the observed strength recovery of limestone fracture. Thus, the coupled model can consider both pressure solution and stress corrosion in modification of the fracture contact area, which is used to predict the frictional healing of the fracture. The simulation results show that the pressure solution model underestimates frictional healing during short hold times, and with extending the hold times, the simulated results of the pressure solution model obviously increase with the growth of temperature, whereas the results are slightly influenced by the effective confining stress. Generally, the stress corrosion model reflects the growth of fracture contact area caused by compaction. Therefore, the coupled model can simulate the frictional healing well observed from Slide-Hold-Slide (SHS) tests. In conclusion, the stress corrosion model should be considered, when the pressure solution model is employed to simulate the frictional healing, especially under short hold times and at low temperatures when the domain effects are mechanical. © 2015, Academia Sinica. All right reserved.


Chen C.,Changsha University of Science and Technology | Chen C.,China Harbour Engineering Company Ltd | Zheng J.L.,Changsha University of Science and Technology
Applied Mechanics and Materials | Year: 2013

The portable falling weight deflectometer (PFWD) test, bearing plate test, beckman beam test, and compaction test were carried out in this study. The relation of dynamic modulus and static modulus, dynamic modulus and deflection, dynamic modulus and compaction ratio, dynamic modulus and water content (consistency) was built. It turns out that there are good power function regression relationship between dynamic modulus and static modulus, dynamic modulus and deflection, dynamic modulus and compaction ratio, dynamic modulus and water content and consistency. © (2013) Trans Tech Publications, Switzerland.


You T.,Changsha University of Science and Technology | Yao Z.-H.,Changsha University of Science and Technology | Wang W.,China Harbour Engineering Corporation
Advanced Materials Research | Year: 2012

A qualitative analysis has been made on the slow development of the engineering project management and corresponding cost control method which has been the bottleneck of the rapid development in the engineering industry and construction production. The economic development of the market and the changing investigation subjects urgently need the reform and renewal to the current engineering project management and the cost control. The unification of engineering project management system in China to the international practice after reform not only adapts the requirements of national economic market development, but also creates conditions for the Chinese construction enterprises to participate in the international construction market successfully. © (2012) Trans Tech Publications, Switzerland.


Chong C.,Changsha University of Science and Technology | Chong C.,China Harbour Engineering Company Ltd
Applied Mechanics and Materials | Year: 2013

The scheme and implement of dynamic compaction on red sand soil embankment, Ying(tan)-Rui(jin) expressway, is introduced in this study. The settlement of the subgrade in the field was observed. The density and the water content of it were tested. Then bearing capacity of the subgrade was detected by PFWD. All the work done is to analyze the effect of dynamic compaction on the red sand soil roadbed. It shows that the water content decreases while the strength increases with compaction. That is, the embankment is compacted effectively by dynamic compaction. © (2013) Trans Tech Publications, Switzerland.

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