Beijing Urban Construction Group Co.

Beijing, China

Beijing Urban Construction Group Co.

Beijing, China

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Yan M.,Tianjin Municipal Engineering Design and Research Institute | Yang X.,Beijing Urban Engineering Design and Research Institute Co. | Li A.,Tianjin Municipal Engineering Design and Research Institute | Wang W.,Tianjin Municipal Engineering Design and Research Institute | And 2 more authors.
Advanced Materials Research | Year: 2012

With the speedy development of Beijing mass transit, the land for metro engineering construction is becoming more and more insufficient; moreover, more and more complicated building environment problems are coming forth in future. In a complex building environment, how to choose available construction method to fast, safely and economically build metro engineering is worthy to be urgently studied in Beijing mass transit. Taking the experiment project of Beijing metro line No.14 as an engineering background, a new construction method that a running tunnel is firstly built by large-size shield method and then a metro station is constructed by shallow mining method to enlarge existing large-diameter shield tunnel is presented in this paper. Based on the building conditions of the experiment project, three architectural design schemes for the metro station and two kinds of construction plans are briefly introduced, and their advantages and disadvantages are analyzed as well. The new construction method can be used as a reference for the design and construction of metro engineering in China in the future.


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.


Jiang H.,China University of Mining and Technology | Jiang H.,Beijing Urban Construction Group Co. | Jiang Y.,China University of Mining and Technology | Zhang J.,Beijing Urban Construction Group Co. | And 2 more authors.
Zhongguo Tiedao Kexue/China Railway Science | Year: 2013

According to the mechanical properties of sand gravel strata, and combined with four bid sections engineering of Beijing Metro, the proportions of cutterhead torque in each composition part of earth pressure balance shield were found out, and the simplified formula of cutterhead torque was obtained. Analysis results show that cutterhead opening ratio is inversely proportional to cutterhead torque. Cutterhead torque decreases about 8% to 10% for every increase of 10% in cutterhead opening ratio. Soil fluid plasticity has a great impact on cutterhead torque. For every decrease of 0.1 in soil friction coefficient, cutterhead torque decreases about 35% to 40% correspondingly. Shield tunneling tests were carried out in the second phase engineering of Beijing Metro Line 10. By means of cutterhead improving (cutterhead opening ratio is increased to 40%) and soil conditioning respectively, cutterhead torque can be controlled between 2500 and 3500 kN·m, and shield advance speed is improved significantly. Test results have further verified that increasing opening ratio and soil conditioning are two very effective measures for reducing cutterhead torque in sand gravel strata. It is also proved that the theoretical formula of cutterhead torque is reasonable and reliable, which can meet the demands for engineering practice.


Jiang H.,China University of Mining and Technology | Jiang H.,Beijing Urban Construction Group Co. | Jiang Y.,China University of Mining and Technology | Zhang J.,Beijing Urban Construction Group Co.
Progress in Mine Safety Science and Engineering II - Proceedings of the 2nd International Symposium of Mine Safety Science and Engineering | Year: 2014

The abrasivity of surrounding rocks is one of the most important characteristics for the estimation of tool wearing. Itis often described through Cerchar Abrasivity Index (CAI). Based on long inclined-shaft of coalmine excavation by (Tunnel Boring Machine) TBM techniques, CAI and mineral composition are determined by Cerchar abrasivity test and X-Ray diffraction test, abrasivity classification and the relationship between mineral composition and CAI are analyzed. The results turned out that rock samples sampling from construction area mainly consist of quartz, potassium feldspar, anorthose, calcite, pyrite and clay mineral. There is a close linear correlation between CAI and equivalent quartz content. In long inclined-shaft, surrounding rock is slightly and medium abrasive, selection of tools based on CAI and mineral composition is feasible. Therefore it is helpful to combined tests results with practical situation to study the tools selection and reasonable distance of tools changing. © 2014 Taylor & Francis Group.


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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