Beijing Urban Construction Group Co.

Beijing, China

Beijing Urban Construction Group Co.

Beijing, China
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Jiang H.,China University of Mining and Technology | Jiang H.,Beijing Urban Construction Group Co. | Zhang J.,Beijing Urban Construction Group Co. | Jiang Y.,China University of Mining and Technology | And 2 more authors.
Modern Tunnelling Technology | Year: 2016

Based on a new shield tunnel for line 8 of the Beijing Metro, which passes under the existing Guloudajie Station of line 2, and combining numerical simulation with field measurements, this paper analyzes the characteristics of station deformation induced by the approaching construction of a double-tube shield tunnel. The results show that the tunnelling mainly affects an area between two settlement joints around the tunnel, and the volume of the settlement trough in this area accounts for 80% of the total volume; the station deformation basically conforms to the normal distribution, of which the deformation induced by the left-line tube construction is slightly greater than that by the right-line tube construction; the maximum settlement of the ballast bed occurs at the center of tunnel, while the largest deformation of the rail surface occurs in the middle of the double-tube tunnel; the deformations of the ballast bed and rail surface mainly occur after the segment emerges from the shield tail, while the settlement of the tunnel sidewall occurs after the shield cutter reaches it and the segment emerges from the shield tail. © 2016, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Fang Q.,Beijing Jiaotong University | Wang J.,Beijing Jiaotong University | Wang J.,Beijing Urban Construction Group Co. | Wang J.,Beijing Urban Construction Design & Development Group Co. | And 2 more authors.
Modern Tunnelling Technology | Year: 2017

Based on the large-diameter (ϕ14.5 m) double-tube river-passing shield tunnel at Weisalu of Nanjing city and on-site monitoring data acquired there, the process and distribution law of surface deformation induced by the construction of a large-diameter slurry shield in sand and sandy cobble strata was studied. The results indicate that vertical surface deformation of the shield tunnel includes four stages: heaving, rapid settlement, slow settlement and stabilization. Surface deformation of single-tube tunnel construction can be described by the Peck formula, with an average Vlvalue of 1.856% and K value of 0.423 by fitting a unimodel shape; Surface deformation of the doubletube tunnel is of a bimodal asymmetrical shape since the later tunnel construction causes the maximum surface settlement and the trough width to increase, thus the trough shape is changed. Surface deformation of the double-line tunnel can be described by a double Peck formula, and there is no obvious correlation between the K value and the number of tunnels and the construction history, and the Vl value is related to the construction method, quality management and construction procedure. © 2017, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Zhang Y.,Beijing Urban Construction Group Co. | Luo G.,Beijing Urban Construction Group Co.
Progress in Steel Building Structures | Year: 2016

This paper introduces the academic research and practical application in the field of building information modeling (BIM), and looks forward to the future development of BIM. First, this paper analyzes the BIM through three aspects of the BIM literature including the time distribution on articles published, the national ranking on articles published and the institution ranking on articles published. Second, through the academic literature, standard specification, news on the website and other perspectives, this paper discusses on the BIM theory, the standard and the application. Finally, the development of BIM is prospected on the theory, standard and application. This paper believes that the BIM will be widely used in the whole process of the project, through the domestic BIM theory, standards, application links to get through. It will bring a new revolution in the field of construction in China. It is not only the optimization of project cost, but also includes the changes to green, friendly, convenient, safe, reliable, intelligent and interactive aspects. These changes will make the whole building industry refreshing. © 2016, Progress in Steel Buiding Structures All right reserved.


Wang Y.,Beijing Urban Construction Group Co. | Li D.,Glodon Software Co. | Liu P.,Beijing Urban Construction Group Co. | Zhang J.P.,Tsinghua University
Applied Mechanics and Materials | Year: 2013

Based on the octree decomposition method and the hierarchical bounding boxes method, an accurate collision detection algorithm integrating spatial decomposition and spatial occupancy is proposed. Through an example of a three-tiered steel building, a quantitative analysis approach to roughly judging the relative efficiency is obtained by comparing the algorithm with several others. The analysis results indicate that the proposed integrated algorithm is applicable to accurate collision detection of building structures. In addition, focusing on two special collision detection issues in construction projects, namely collisions of pipeline projects, and collisions between dynamic construction machines and building components during construction process, the integrated algorithm is also improved according to the corresponding characteristics. A real construction project of a medical building is used to verify the feasibility and effectiveness of the improved algorithms. The results illustrate that the improved algorithms can solve the existing problems and provide satisfied efficiency. © (2013) Trans Tech Publications, Switzerland.


Wu F.,Beijing Urban Construction Exploration and Surveying Design Research Institute Co. | Wu F.,Beijing Urban Construction Group Co. | Wu F.,University of Science and Technology Beijing | Jin H.,Beijing Urban Construction Exploration and Surveying Design Research Institute Co. | Shang Y.,CAS Institute of Geology and Geophysics
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2013

Through summarizing the monitoring results, it is pointed that when the pipeline rigidity is large, and the settlement between pipeline and formation is large. The general deformation law of underground pipeline is basically the same to the move of stratum. When the pipeline is vertical above the tunnel, the settlement curve fits to the normal distribution. The Peck formula for ground surface settlement prediction in tunnel engineering is corrected, and the pipeline settlement prediction formula is established. Combining the former research results of stratum loss rate V1, the reference value of pipeline settlement trough width parameter Kp is calculated. The result of numerical simulation shows that the deformation of pipeline parallel above the tunnel is more than vertical above the tunnel, and the pipeline settlement prediction formula may preliminarily evaluate the deformation of pipeline parallel above the tunnel. The rigid pipeline longitudinal strain calculation formula may also be modified to get the pipeline deformation. The engineering application proves that the pipeline settlement prediction formula, numerical simulation and monitoring results are in good agreement, and the pipeline settlement prediction formula is good in application.


Liao Q.,CAS Institute of Geology and Geophysics | Liao Q.,Beijing Urban Construction Group Co. | Li X.,CAS Institute of Geology and Geophysics | Zhu W.,Northeastern University China | Liu J.,University of Western Australia
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010

Digital image which describes the material by lattice data provides a good base to build the structure model of rock and soil aggregate(RSA) accurately. Based on the analysis of the digital imaging theory, the color contrast between rock and soil in RSA is analyzed. An auto-generating method of RSA structure model is proposed based on digital image to express spatial structure of RSA directly, quickly and accurately. Firstly, the differences of colors between roils and rock blocks are transferred into digital mode, and each pixel in the image of RSA is described by a digital eigenvalue. Then, the threshold for the digital eigenvalue that can represent rock block pixel is obtained by comparing RGB values or HIS values of RSA images. So each pixel is set different material properties according to the threshold; and the numerical structure of RSA is constructed. Besides, the numerical simulation of the structure model of RSA is carried out. It is shown that the nonuniform of rock distribution of RSA will cause an obvious mechanical structure effect on RSA under uniaxial compression.


Jiang H.,China University of Mining and Technology | Jiang H.,Beijing Urban Construction Group Co. | Jiang Y.S.,China University of Mining and Technology | Zhang J.X.,Beijing Urban Construction Group Co.
Applied Mechanics and Materials | Year: 2014

Parameters monitoring and risk management is more and more important and necessary for Tunnel Boring Machine(TBM) along with strata and environmental conditions are becoming increasingly complex. The accurate and real-time monitoring of TBM construction process is the basis of security for structure, environment and avoiding the engineering accidents. However, almost all existing TBMs only have the functions of data collecting and storing, how to use these data to monitor and evaluate the status of TBM advancing in real-time, as well as realize the functions of risk prediction and management are still a continuous research problems. In this paper, Risk Monitoring System for Tunnel Boring Machine(RMSTC) has been researched and developed to monitor the process of TBM tunneling and manage the construction risks. The engineering practices show that the RMSTC is a safe and credible system which can achieve data transmission, parameters analysis and material consumption statistics in real-time, and it offers a new efficient way for risk recognition, analysis, evaluation, prediction and control. © (2014) Trans Tech Publications, Switzerland.


Jiang H.,Beijing Urban Construction Group Co. | Jiang H.,China University of Mining and Technology | Zhang J.,Beijing Urban Construction Group Co. | Jiang Y.,China University of Mining and Technology
Modern Tunnelling Technology | Year: 2013

The sandy cobble stratum encountered by the Beijing metro project is characterized by a high content of large cobbles, great friction resistance, and a low plastic flow of the soil body, all of which caused many difficulties regarding the control of the shield thrust during tunnel construction. To lower the risk and increase efficiency, a careful study of the characteristics of thrust compositions and controllable factors of the EPB shield was carried out, a systematical analysis of the mechanism of the EPB shield driver was undertaken, and a formula for theoretical shield thrust calculations was deduced. The composition characteristics of a shield thrust in a sandy cobble stratum were analyzed and a simplified formula was derived according to the mechanical characteristics of the sandy cobble stratum. To demonstrate the rationality of the theoretical formula, a sensitivity statistical analysis with the derived shield thrust as a study object was carried out regarding the two controllable factors of open ratio of the cutter head and internal friction angle of the muck. The results show that: 1) the shield thrust is inversely proportional to the open ratio of the cutter head with an increase of the open ratio by 10%, resulting in a reduction of the shield thrust by about 3~5%; and 2) the shield thrust is proportional to the internal friction angle of the muck with an increase of the internal friction angle by 10°, resulting in an increase of the shield thrust by about 6~10%. The research results were verified by the on-site shield driving test during the phase 2 project of the Beijing Metro line 10. This study can be used as a reference for similar projects in terms of shied selection, thrust prediction, and control measures.


Sun Y.,Beijing Jiaotong University | Zhang D.,Beijing Jiaotong University | Yu F.,Beijing Jiaotong University | Wang J.,Beijing Urban Construction Group Co. | Huang J.,Jiangsu Transportation Research Institute
Zhongguo Tiedao Kexue/China Railway Science | Year: 2016

By analyzing the differences in the boundary conditions and balance equations of secondary lining structure and common compressed structure in "Code for Design on Tunnel of Railway", a conclusion can be drawn that using uniaxial tensile and compressive strength as the parameter for estimating the failure of secondary lining material for high speed railway tunnel seems to be excessively safe. Taking a high speed railway tunnel with V-class surrounding rock and for the train speed of 350 km·h-1 as research object, the quasi-stratum-structure model was established by using MIDAS-NX numerical simulation software. The conversion relation between the strength parameter and uniaxial strength of concrete material was derived under the guidance of Mohr-Coulomb strength criterion. On this basis, the deformation characteristics and the ultimate bearing capacity of secondary lining were analyzed and compared with the measured data of second lining structure. The results show that, as the lateral pressure coefficient increases gradually, the tunnel shape turns progressively from flat to upright under critical failure condition. After loading, the plastic zone both inside and outside of the secondary lining structure is obviously influenced by lateral pressure coefficient. The secondary lining structure shows the optimal bearing capacity as the lateral pressure coefficient is 1.4. The steel bars of secondary lining mainly control the first principal stress (tensile stress) of lining element. The actual loading amount of secondary lining is far less than its ultimate bearing capacity. Accordingly, the secondary lining can be "thinned". © 2016, Chinese Academy of Railway Sciences. All right reserved.


Xu H.,Beijing Urban Construction Group Co. | Xu H.,Sub Company of Municipal Infrastructure
Proceedings - 2015 7th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2015 | Year: 2015

Taking a reinforcement engineering about existing foundation pit as the background, the FLAC3D is used to simulate the process of construction and pile-anchor supporting system. During the simulation Mohr-Coulomb model is used and contact elements are applied to the interfaces between anchor and soil. According to the measured data and parametric analysis results, the soil parameters are calculated with FLAC3D. By using these parameters, the existing supporting deformation under original scheme is calculated. The reinforcement scheme is adopted on the basis of calculation results. The analysis results of the deformation, that were calculated by this model, were generally in agreement with the measured data. Furthermore, the agreement shows that the FLAC3D model and analytical method are reliable. And the results of FLAC3D numerical simulations can satisfy the need of engineering, so it can be well applied to analyze and predict practical engineering. © 2015 IEEE.

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