ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2019, Vol. 39 ›› Issue (6): 1030-1037.DOI: 10.3973/j.issn.2096-4498.2019.06.017
Previous Articles Next Articles
KONG Shaobo
Received:
Revised:
Online:
Published:
Abstract:
The issues such as cutter spacing arrangement, cutterhead structure analysis and cutterhead function optimization in the design of superlarge diameter shield cutterhead boring in submarine complex strata are very important. Hence, the working conditions of a shield bay tunnel crossing fullface soft strata, soft strata intruded by boulders and bedrock protruding strata are analyzed in detail based on geological and hydrological conditions of the project. Firstly, the indoor rock breaking tests with different cutter spacings are carried out to determine the cutter spacing in the central area, and the general layout scheme of the cutterhead is proposed. And then the static and modal analysis of the cutterhead structure are carried out by numerical calculation, and the results show that the maximum structural stress reaches 190 MPa, the maximum deformation reaches 6.2 mm, the first six natural frequencies range from 26.6 Hz to 42.9 Hz, and the natural frequencies avoid the working frequencies. Finally, the cutterhead optimization methods, i.e. centralized control and distributed scouring system, cutter running condition monitoring and wearresistant protection measures are put forward. The application results show that the cutter spacing is rational, the cutterhead structure can meet the requirements of strength and stiffness, and the cutterhead optimization methods can improve the adaptability of shield in silt and hard and soft strata. The results can provide reference for shield design and selection in similar projects in the future.
Key words: shield, cutterhead, cutter spacing, statics, modal analysis, condition monitoring
CLC Number:
U 45
KONG Shaobo. Design and Optimization for Cutterhead of an Extralarge Diameter Slurry Shield Boring in Submarine Complex Strata[J]. Tunnel Construction, 2019, 39(6): 1030-1037.
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: http://www.suidaojs.com/EN/10.3973/j.issn.2096-4498.2019.06.017
http://www.suidaojs.com/EN/Y2019/V39/I6/1030
Key Technologies of Cutterhead Configuration and Cutter Replacement for Large diameter Shield under High Water Pressure
Fullscale Experimental Study on Bending Performance of Segmental Joints of Large Crosssection Shield Tunnel under Pure Compressive Bending Condition
Launching and Receiving Technology of Large Crosssection Horseshoeshaped Shield Used in Baicheng Tunnel