China Airport Construction Group Corporation of CAAC

Beijing, China

China Airport Construction Group Corporation of CAAC

Beijing, China

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Liu Y.,China Airport Construction Group Corporation of CAAC | Liu Y.,Beihang University | Liu Y.,Beijing Super Creative Technology Co.
Applied Mechanics and Materials | Year: 2013

This article introduces one new measurement technology for evaluation of the early age shrinkage performance of concrete material without constraint conditions. Its exercise of eddy current method could make the airport pavement concrete material tested accurately during concrete early-age from pouring, when the pavement concrete does not harden. It also can evaluate the effects of the influencing factors on the concrete early-age shrinkage, such as fly ash, admixture, and fiber. By this method, the Shrinkage performance of different concrete material can be evaluated when concrete property design for airport pavement is making. © (2013) Trans Tech Publications, Switzerland.


Wang H.,Xinjiang Airport Group Co. | Wu Y.,Xinjiang Airport Group Co. | Ye S.,China Airport Construction Group Corporation of CAAC
Applied Mechanics and Materials | Year: 2012

In the process of old cement concrete pavement is transformed, asphalt overlay is the common method. However, due to the cracks of the original cement concrete slab when load and temperature and humidity changes will produce a relative displacement, it can not avoid reflective cracking. So in order to prevent the reflective cracking of asphalt overlay, crush the old cement concrete pavement is the important manner. Different construction technology is divided into three kinds: cracked steady pressure, impact compaction and rubblization technology. Among these, rubblization is an important technology that utilizes in-situ crushing technique in cement concrete pavement. This article discusses the characteristics of these three techniques, and it also evaluates effectiveness. © (2012) Trans Tech Publications, Switzerland.


Liu Y.,China Airport Construction Group Corporation of CAAC | Wang P.-M.,Tongji University | Guo Y.-H.,China Academy of Building Research
Jianzhu Cailiao Xuebao/Journal of Building Materials | Year: 2011

A dumbbell test device for evaluating the anti-cracking performance of concrete material under constraint conditions was developed based on comparison of domestic and overseas anti-crack test methods of concrete. This dumbbell test technology can help quickly and accurately evaluate the anti-cracking performance of concrete material with the device of stress riser to quickly induce cricks. Compared with existing two test methods for testing anti-cracking performance of concrete (ring method and slab test method) the dumbbell method has several advantages, such as good sensitivity, high accuracy, short testing cycle and convenient operability.


Hong S.Y.,China Airport Construction Group Corporation of CAAC | Liu Y.,China Airport Construction Group Corporation of CAAC
Advanced Materials Research | Year: 2013

How to reduce the energy consumption on airport jobsite is the focus of this paper. We introduce this control technique and its specialist-aided system which can predict material temperature and save energy. After pouring concrete material, the technique can test and predict temperature change trend and concrete changing maturity level, based on key parameter information provided by contractors. Optimal curing method, thermal insulation and construction technology are developed giving the results of the preceding data. Contractors can find optimal solutions to save energy and resourced in airport winter construction using the technique, thus avoiding unnecessary energy consumption. © (2013) Trans Tech Publications, Switzerland.


Liu Y.,China Airport Construction Group Corporation of CAAC | Liu Y.,Beijing Super Creative Technology Co. | Xiao B.,China Airport Construction Group Corporation of CAAC
Advanced Materials Research | Year: 2013

This paper studies the influence of fly ash with different dosage and grades on the crack performance of airport pavement concrete. In order to test airport pavement concrete material accurately and quickly, Dumbbell Test Method was introduced in its early-age from pouring. Dumbbell Test Method is able to evaluate the effect of fly ash with different grades and dosage on volume stability of airport pavement concrete. This paper also studied the mechanism of the influence of fly ash crack performance of airport pavement concrete. © (2013) Trans Tech Publications, Switzerland.


Wang X.Z.,China Airport Construction Group Corporation of CAAC | Liu R.,Northwest University, China
Applied Mechanics and Materials | Year: 2013

The compaction characteristics of the lime-treated expansive soils from the planning airport in China's Ankang were studied through the heavy compaction tests. The results show that all these elements such as lime content, water content, soil height, wetting time have a certain effect on dry density. As the lime quality ratio increases, the optimum water content under heavy compacting standard of improved soils increases but the maximum dry density decreases. With the increase of lime content, the effect of water content on dry density decreases while the water content near to its optimum value. Soils with the lower height have higher dry density when compaction energy, lime content and water content unchanged. As the wetting time increases, the maximum dry density shows a decreasing tendency until after 48 h it remained stable. It indicates that with the same lime content the order of primary factors influence on dry density are water content, wetting time, soil height. Finally, the lime stabilizing principle to expansive soil is explained through by applying scanning electron microscope technique. © (2013) Trans Tech Publications, Switzerland.


Zhang S.P.,China Airport Construction Group Corporation of CAAC | Liu Y.,China Airport Construction Group Corporation of CAAC
Applied Mechanics and Materials | Year: 2014

In this paper, a new method is proposed to measure the early shrinkage of airport pavement concrete material. Also, the effect of fly ash with different grades and dosage on early shrinkage and late shrinkage deformation of commercial concrete were studied. The effect of fly ashwith different grades and dosage on volume stability of commercial concrete was assessed by using the test method of shrinkage cracking, and the causes and mechanism of the effect were analyzed. © (2014) Trans Tech Publications, Switzerland.


Huang M.-S.,Tongji University | Liu H.-Z.,Tongji University | Cao J.,China Airport Construction Group Corporation of CAAC
Yantu Lixue/Rock and Soil Mechanics | Year: 2012

Response displacement method is a kind of simple and practical analysis method for aseismic design of soft soil tunnel, for the method can reflect dynamic reaction behavior of soft soil tunnel under aseismic load. Taking square section tunnel for example, the accuracy of the method has been verified by comparing its predictions with results from a soil-structure whole dynamic finite element method. Based on plane strain assumption, the analytical expression for soil spring stiffness has been deduced from the function of complex variable method in elastic theory for the purpose of simplifying the calculation process of response displacement method. The analytical solution for soil spring stiffness has been verified by comparing its predictions with results from finite element method. The analytical expression for soil spring stiffness has been applied to response displacement method. Meanwhile, simplified calculation models for shear stress and seismic response displacement of free soil field have been adopted. The whole dynamic finite element method has been used to validate the accuracy of simplified response displacement method for transverse secion aseismic analysis of soft soil tunnel.


Cao X.-M.,Beijing Jiaotong University | Cao X.-M.,China Airport Construction Group Corporation of CAAC | Wang X.-F.,Beijing Jiaotong University
Jiaotong Yunshu Xitong Gongcheng Yu Xinxi/ Journal of Transportation Systems Engineering and Information Technology | Year: 2010

Scientific and rational selection of multi-airport site is one of the important decision-making problems which involve a number of factors and different interests groups, and generate coordinated capacity of each airport system and maximum benefits. Based on impact analysis of the departing air travelers airport random choice behavior a bi-level programming model is proposed to describe the multi-objective criteria in the process of location decision in the multi-airport region. The upper level model is to maximize the decision makers benefits and the lower level model describes the travelers airport choice behavior. Thus, benefits of both traffic decision makers and air travelers are considered in the proposed model. The heuristic algorithm is used to solve the model. Finally, an example is used to show the validity and rationality of the proposed model. The results indicate that the multi-criteria decision making method is close to the actual situation, and it has practical significance in the aspect of optimizing airport resource allocation and improving airport competitiveness in multiple airport region.


Cao J.,Tongji University | Cao J.,China Airport Construction Group Corporation of CAAC | Huang M.S.,Tongji University
Physical Modelling in Geotechnics - Proceedings of the 7th International Conference on Physical Modelling in Geotechnics 2010, ICPMG 2010 | Year: 2010

This paper focuses on the dynamic responses of tunnel in dense soil. Centrifugal modeling technique was employed where the results were presented for a total of six tests conducted on a buried tunnel in a laminar box under 50 g gravitational field. Three sets of earthquake motions with different intensities were applied. Mean while, a laminar box was used to consider different boundary (flexible and rigid) effects during earthquakes. The earthquake responses of free field were also simulated in another later three sets of tests. The results indicates that dynamic responses of tunnel are significantly different from those under static condition, and the performance of ground and tunnel depends on the intensity of the excitation motion as well as the physical boundaries of centrifuge model distinctively. The ground responses were different under free field and non-free field conditions, due to the existence of tunnel affecting the ground responses to some extent. © 2010 Taylor & Francis Group, London.

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