Shanghai Tunnel Engineering Co LTD

Shanghai, China

Shanghai Tunnel Engineering Co LTD

Shanghai, China
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Huang J.,Shanghai Tunnel Engineering Co.
Modern Tunnelling Technology | Year: 2016

To solve the problem of full-face cutting of quasi-rectangular shield, this paper verified the strength of its large cutterhead through 3D design and FEM calculation, discussed the feasibility of its synchronous control by means of simulation based on rotation interference of CAD dual cutterhead, and proposed the cutterhead technique meeting full-face cutting by qusi-rectangular shield. In this paper it focuses on the structural design and strength checking of dual cutterhead, the features of eccentric cutterhead and the combined cutting technique (i.e. two Xshaped spoke-type cutterheads + one multi-axis eccentric cutterhead) which will be applied to the quasirectangular shield tunnelling of phase 1 of Ningbo Metro line 3. © 2016, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Huang J.,Shanghai Tunnel Engineering Co.
Modern Tunnelling Technology | Year: 2016

In light of the problems of shield machines like hasty pipeline layout, crowded space, etc, an optimization design was carried out regarding the relevant parameters of its screw conveyer. Specifically, a spherical-hinge type screw conveyer was proposed in this paper through a 3D structural design, component strength checking and CAD simulation and barrel offset analysis without affecting the working conditions and efficiencies. The principles mean that barrel rotates by taking one point on it as the sphere center of spherical hinge in the case of shell articulation and setting a cambered support on barrel to offset the oscillation induced by rotation. This technique will be applied to the quasi-rectangular shield tunnel of Ningbo. © 2016, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Li H.,Shanghai Tunnel Engineering Co.
Modern Tunnelling Technology | Year: 2016

In this paper, considering that articulation sealing device is one of the key components of a large shield machine, an adjustable test device was designed for the quasi-rectangular shield machine based on its shape and structure, and relevant design and test schemes were presented as well. With this test device, deviation correction of shield machine can be simulated for the case of articulation sealing failure, and the sealing performance of articulation sealing device under different external pressures can be tested, thus references for the design of articulation sealing device can be taken based on these data. © 2016, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Qin Y.,Shanghai Tunnel Engineering Co.
Modern Tunnelling Technology | Year: 2016

In this paper, a synchronous control method was proposed for quasi-rectangular shield to prevent it from the interference induced by the operation of dual cutterhead, which is applicable to the dual cutterhead driving system consisted of variable frequency inverter, sensors for angle and velocity detection, programmable controller, etc. With this method, two sets of spoke-type cutterheads may achieve continuous operation within a specified range of angle under the closed-loop PID control; angular deviation of the dual cutterhead can be corrected dynamically and in real time based on the collected velocities and angles and preset constraint conditions and control strategies. © 2016, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Zhao J.,Shanghai Tunnel Engineering Co.
Modern Tunnelling Technology | Year: 2016

This paper gives a detailed analysis of the mechanical properties of a soil mass cut by a cutterhead in the process of shield driving and a method for calculating the cutter wear of a slurry shield that is deeply buried in sandy strata. The loading features of a single cutter are obtained by the solution of a soil shear failure equilibrium equation, and then the theoretical torque of the whole cutterhead is given by way of summation. The concept of a cutterhead wear coefficient is proposed based on the comparison of the theoretical torque and the measured torque. Application to a specific case indicates that the shield can keep driving if the cutter wear coefficient is around 0.8, while the torque tends to decline rapidly if the coefficient is lower than 0.75, and the cutting tools must be changed if the coefficient is lower than 0.5. After changing the cutting tools in the above mentioned project, the calculated theoretical torque is approximate to the measured torque, which further validates the reliability of the research method presented in this paper. © 2016, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Wang Y.,Shanghai Tunnel Engineering Co.
Modern Tunnelling Technology | Year: 2016

Since the tunnel from Longhualu station to Longchaolu station of Shanghai metro line 12 would pass underneath a thousand-year old monastery-the Longhua Temple-the shield was refitted by adding more grouting holes on the segments before tunneling in order to reduce the settlement and incline of the Longhua Pagoda. With the application of balanced construction and refined management, as well as the adoption grouting reinforcement method after completion of the undercrossing construction, the Longhua pagoda was kept safe and stable while the construction of the subway tunnel was successfully completed. © 2016, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Gu C.,Shanghai Tunnel Engineering Co.
Modern Tunnelling Technology | Year: 2014

Due to the special environment of underground tunnel, various factors may cause different degrees of damages to lining whether in tunnel under construction or that during operation. And relevant reinforcement is an effective way to avoid further deformation of damaged tunnel. Taking the tunnel constructions in multiple cities in China as aexamples, this paper analyzed some reasons and types of tunnel damage, introduced the key technical measures on waterproofing and structural reinforcement, and presented a new installation equipment for steel ring support and its technological process, thus providing reference for similar projects. ©, 2015, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Wei L.,Shanghai Tunnel Engineering Co.
Modern Tunnelling Technology | Year: 2014

The mining method with soil reinforcement is now mainly adopted in the construction of cross passages of shield tunnels, which is characterized by high risk and complex working conditions. In this paper, based on the adoption of a specially developed rectangular pipe-jacking machine with a planetary cutterhead, full-face cutting tests are carried out on concrete samples of different strength grades. Research on cutting-tool selection and layout, as well as the machinability of pipe-jacking with a planetary cutterhead, are undertaken, providing a technical reference for future cross-passage construction in shield tunnels adopting pipe-jacking to cut concrete composite segments, thereby refraining from exposing the reinforced soil mass due to segment removal, and greatly reducing the construction risk. ©, 2014, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Zhang L.,Shanghai Tunnel Engineering Co.
Modern Tunnelling Technology | Year: 2014

Based on a shield tunnel of the Zhengzhou metro that passes under an electric power tunnel, a numerical simulation analysis was carried out by ABAQUS software and the settlement laws of the ground surface and the electric power tunnel were researched, as well as shield tunnel construction in sandy strata. The results show that: the maximum ground surface settlement that occurred at the middle of the two tunnels is about 12mm, while the maximum ground settlement of the electric power tunnel, occurring at the intersection of the two tunnels, is about 15mm, all of which are within an allowable range. Thus, it is concluded that the settlements are both controlled by targeted construction measures, which ensure the security of electric power tunnel. ©, 2014, Editorial Office of "Modern Tunnelling Technology". All right reserved.


Wen S.-L.,Shanghai Tunnel Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

Critical construction techniques used in the deep excavation for West-East Transport System (WETS) are presented. Protecting the Shanghai Metro line 2 traverse by WETS in complex geological condition is of great concern. The construction scheme is established according to the principle of ″time-space effect″ and ″stiffness of tunnel″. Deep soil mixing method is used to construct retaining walls which divide the excavation area into several little pits. Excavation sequence of the pits are jumping and single pit is excavated by staged method. The monitoring results show that the proposed series of techniques is effective and the uplift of the tunnel is controlled within a safe range.

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