Beijing Municipal Engineering Group Co.

Beijing, China

Beijing Municipal Engineering Group Co.

Beijing, China
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Li Z.,Beijing Jiaotong University | Yan M.,Tianjin Municipal Engineering Design and Research Institute | Wang T.,Beijing Municipal Engineering Group Co. | Zheng H.,Beijing Municipal Engineering Group Co.
Modern Tunnelling Technology | Year: 2015

As the external environment and its surroundings of metro engineering has been becoming more complicated, the conventional metro construction schemes are confronted with high challenges and great risks. In this paper, taking Beijing metro line 14 as an engineering practice, the construction scheme of large-diameter shield for metro engineering is presented: e.g. the single-tube double-track running tunnel and metro station section are successively driven by the large-diameter shield machine (φ10.2 m), and then the metro station is enlarged by mined method. Besides, the other issues are discussed in detail, including the shield tunnel structure type, shield tunnel construction scheme, enlarged metro station construction scheme, design option of key structural parts and key enlarged excavation technologies. The engineering practice shows that structure risks and environment risks are effectively controlled during metro construction. Using the proposed new construction method it can solve construction problems of metro engineering under urban complex conditions and also the conflict between shield tunnel construction and station construction. © 2015, Editorial Office of "Modern Tunnelling Technology". All right reserved.


He M.D.,Beijing Jiaotong University | Zhang D.L.,Beijing Jiaotong University | He M.D.,Beijing Municipal Engineering Research Institute | Liu J.,Beijing Municipal Engineering Group Co. | Le G.P.,Beijing MTR Construction Administration Corporation
Rock Mechanics: Achievements and Ambitions - Proceedings of the 2nd ISRM International Young Scholars' Symposium on Rock Mechanics | Year: 2012

Based on the construction of deep foundation pit in Beijing, according to the actual construction process of supporting structure, the beam calculation model was used for excavation and support of the deep foundation pit. In the pit, piles and internal bracing were used as the enclosure structure. The interval force and deformation of supporting structure were discussed. According the calculations of numerical modeling, the variable law of horizontal displacement, bending moment and axial force in the pile body was analyzed. It was comparative analyzed between the monitoring data and the calculated values of y horizontal displacement and bracing axial force in the pile bod. The results show that: (1) the maximum horizontal displacement of pile increases with the increase of excavation depth and time, and maximum horizontal displacement of points moving gradually to excavation face. The horizontal displacement reached a maximum value when the excavation at the bottom of the pit. (2) while the axial force is a reflection of the pressure of behind the supporting structure, but the axial force was not increased with the depth of bracing. (3) comparative analysis result of field monitoring shows that the variable law of values calculated by the numerical simulation results well agrees with the measured data. © 2012 Taylor & Francis Group.


Li D.-H.,Beijing Jiaotong University | Li D.-H.,Beijing Municipal Engineering Research Institute | Wang M.-S.,Beijing Jiaotong University | Ding Z.-M.,Beijing Municipal Engineering Research Institute | And 3 more authors.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2012

According to a deep excavation of subway in gravelly soils, the deformation of SMW retaining structures in non-soft soils is analyzed by three-dimensional numerical analysis. At the same time, the monitoring data of the deformation of retaining structures and the settlement of adjacent ground surface during the excavation of foundation pit are analyzed. Through the comprehensive analysis, the SMW retaining structures are suitable to the gravelly soils and their stiffness is more than that of the row piles with diameter of 800 mm and pile spacing of 1400 mm. The spatial and temporal distribution laws of the deformation of retaining structures and the settlement of the adjacent ground surface are summarized. It may be useful for deformation prediction and determination of control value of similar projects in future.


Li X.,China University of Mining and Technology | Zheng H.,Beijing Municipal Engineering Group Co. | Wang Q.,Beijing Municipal Engineering Group Co.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2016

The Jiangtai metro station of Beijing Metro line 14 is constructed by enlarging the large-diameter shield tunnel with the mining method. A CRD (cross diaphragm) construction scheme of enlarging the shield tunnel is put forward in the preliminary design. By considering the geological conditions and environmental conditions, the problems of the CRD scheme are analyzed and a PBA method (Pile-Beam-Arc method) is proposed. In order to control the ground settlement and the influence on the surrounding environment, the dewatering scheme is replaced with deep the hole grouting in the excavation face. Three-dimensional finite element models are used to simulate the ground-structure interactions. The numerical results show that the structural stress state varies frequently in the enlarging process. Due to excavation of the two sides of middle pilot tunnels and dismantling of the K segment, the stress of the primary lining of the middle pilot tunnel increases dramatically. The primary lining parameters and the excavation method for the two sides of the middle pilot tunnels are adjusted according to the analysis results. Although the stress state of the segments shifts from compressive stress to tensile stress in the dismantling process of both sides of the small segment, the overall stability is not affected. The maximum principal stress in the middle partition wall appears after dismantling both sides of the small segment. The calculation results show that the construction optimization scheme is feasible and the structural safety can be guaranteed. © 2016, Editorial Office of China Civil Engineering Journal. All right reserved.


Wang F.,Beijing Jiaotong University | Wang T.,Beijing Municipal Engineering Group Co. | He S.,Beijing Jiaotong University | Liu J.,Beijing University of Civil Engineering and Architecture | Zou B.,Beijing General Municipal Engineering Design and Research Institute
Zhongguo Tiedao Kexue/China Railway Science | Year: 2013

The section tunnel from Dongfengbeiqiao Station to Futongdong Station of Beijing Metro Line 14 was constructed by earth pressure balance shield, and the shield tunnel will be enlarged in small-scale by PBA (Pile-Beam-Arch) method to form small metro station. The critical joints of station structure during the enlarging process have four categories. They are segment joints, blocks connection of key segment, connection between longitudinal beams and segments as well as the joints of main arch primary supports and key segments. According to the structural styles of critical joints, the three-dimensional discontinuous contact model is used to simulate the construction process, and the deformation and internal force of critical joints are studied. The results show that the deformation of segment joints and blocks connection of key segment meets the requirement. The construction process greatly influences the redistribution of structural internal force so some bolts exceed tensile strength. The connection of top longitudinal beam and top segment doesn't slip relatively but separates slightly in the case of symmetrical excavation. The resisting shear bolts of top longitudinal beam exceed tensile strength. The connection of bottom longitudinal beam and bottom segment doesn't slip and separate relatively, and the weld seams of joints of main arch primary supports and key segments meet requirement. Thus the station structure is basically steady in this project, only parts need to be strengthened.


Li Z.,Beijing Jiaotong University | Wang T.,Beijing Municipal Engineering Group Co. | Zheng H.,Beijing Jiaotong University
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2015

The Jiangtai station of Beijing metro line 14 was built by enlarging the large diameter shield tunnel with the mining method. The key construction stage was analyzed in detail by using three-dimensional finite element simulations with emphasis on the effects of the asymmetric pilot tunnel excavation and the asymmetric dismantling of the K shield segments. The results showed that the stress distribution in the primary lining structure, the segment and the middle partition wall appeared asymmetric. The stresses in the segments were turned from compressive into tensile and the stress in the primary lining reached its maximum value after one side of the K segment was dismantled. When the pilot tunnel was excavated, the stress in the middle partition wall was under uneven pressure after one side of the pilot tunnel was excavated. The compression stress in the middle partition wall reached the maximum after both side of K segments were dismantled. On the basis of the numerical simulation results and the onsite monitoring data for the middle partition wall, the supporting parameters of the middle pilot tunnel, the excavation method of the middle pilot tunnel and the method of K segment dismantling were optimized to ensure the safety of the enlarging excavation and the metro station structure. ©, 2015, Academia Sinica. All right reserved.


He M.,Beijing Jiaotong University | He M.,Beijing Municipal Engineering Research Institute | Liu J.,Beijing Municipal Engineering Group Co. | Le G.,Beijing MTR Construction Administration Co. | And 2 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010

Based on a certain constructing running shield tunnel of Beijing metro side-crossing close to a high-rise building, using the finite element method calculation model and site monitoring method, the foundation characteristics of the high-rise building affected by the constructing shield tunnel are studied. In different construction stages, the variations of the foundation settlement and inclination of the high building are analyzed. The simulation results show that stratum vertical displacement has a sudden change near the high-rise building. Away from the building in an enough distance, the displacement curve becomes flat. From site monitoring results, the high-rise building inclined to the direction away from the tunnel prior to the shield closing to the building, while the building inclined towards the tunnel during shield crossing. The settlements of the monitoring points reach the maximum value when the shield is 10.0 m away from the monitoring surface. However, the settlements declined significantly when the shield is more than 60.0 m from the monitoring surface, and finally becomes stable. The simulation and the site monitoring results agree well. The conclusion would be helpful for the future similar shield tunneling projects.


Li H.,Beijing University of Technology | Yang Y.,Beijing University of Technology | Tu X.,Beijing University of Technology | Wang T.,Beijing Municipal Engineering Group Co.
Przeglad Elektrotechniczny | Year: 2012

For the electrical control system of push pipe driving machine, the adjustment of jacking force is critical to balancing the resistance force and moving the pipe string forward. This force should be well under control so as to avoid both the collapse (active failure) and the blow-out (passive failure) of the soil mass near the tunnel face. The aim of this paper is to determine the collapse and blow-out face jacking force of a rectangular tunnel. The analysis is carried out in the framework of the kinematic method of limit analysis theory. The numerical results obtained are presented and analyzed.


Wang B.,Beijing Jiaotong University | Wang B.,Beijing Municipal Engineering Group Co. | Li Z.,Beijing Municipal Engineering Group Co. | Wang T.,Beijing Jiaotong University | Zheng H.,Beijing Jiaotong University
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2015

A construction method that a running tunnel of two tracks is constructed by large diameter shield machine and moreover a station is built by shallow mining method to enlarge large diameter shield tunnel can be regarded as a new approach to solve the construction problems of metro engineering under complex environmental conditions. Taking Beijing metro line 14 project as the engineering background, the metro station is constructed by shallow mining method to enlarge large diameter shield tunnel. The construction scheme and technology measures that the large diameter shield machine pass through metro station are discussed in detail. A new method of shield machine passing through the metro station duct is put forward for the first time and broke the constraints of conventional model, which the metro station duct is constructed after the shield machine pass through metro station. The construction coordination contradiction between metro station and metro tunnel has been solved successfully. A new enlarging excavation method is put forward, which the station structure can be constructed by using the large diameter shield tunnel as the construction work platform and construction channel. The enlarged excavation method has been applied in the construction process of Gaojiayuan metro station and it will provide a solution method to the construction of metro station when the ground of station site cannot be taken up. By analyzing the key construction stages, the designing schemes such as the enlarged excavation method, K segment dismantled method and the steel support system in the shield tunnel etc, are optimized to ensure the safety of enlarged excavation and the metro station structure. The engineering practice shows that the construction risk for the metro station structure and the surrounding environment are controlled effectively. ©, 2015, Editorial Office of China Civil Engineering Journal. All right reserved.


Li Z.,Beijing Jiaotong University | Nie N.,Beijing Jiaotong University | Yang C.,Beijing Jiaotong University | Wang T.,Beijing Municipal Engineering Group Co.
Beijing Jiaotong Daxue Xuebao/Journal of Beijing Jiaotong University | Year: 2011

In this paper, a large section tunnel of Beijing metro line 4 is regarded as research background, Two kind of different supporting calculation models(The first supporting calculation model is that the total load is applied to the initial support and inner support, and the second supporting calculation model is that the action effect of initial support can be ignored and the total load is applied to the inner support) are employed respectively to calculate the safety factor and reliability index for tunnel structure. The calculation result indicate that the tunnel structure safety factor meet the safety challenge. However, the tunnel reliability index cannot meet the safety challenge requirement with the second calculation model. Based on the result of the tunnel structure loading effect with the response surface method, the equivalent stratum elastic resistant coefficient is put forward to describe the role of initial support. The result provides a treating path to solve the reliability index difference by using different support model.

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