Integrated Approach to Machine Guidance and OperationsMonitoring in Tunnel Construction

Shen, Xuemin; Lu, Ming; Mao, Sai; Wu, Xiaodong

doi:10.22260/isarc2014/0014

Cited by 6 publications

(6 citation statements)

References 6 publications

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“…However the staged approach to assessment of engineering status of a tunnel not always allows to reveal hazardous processes in the considered geotechnical system and to realize effective protective measures at the appropriate times. It is essential not only to analyze separate operational stages of a tunnel, but also provide an information modeling of the lifespan of an object by creation of information model using BIM technologies [4][5][6][7][8][9][10]. At the present time, BIM technologies actively implement into many fields of industrial, civil and transport facilities design.…”

Section: Discussionmentioning

confidence: 99%

Assessment of the impact of railway tunnel lining defects with a long working lifespan on its carrying capacity

2017

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Abstract.Assessment of engineering status of railway tunnels with a long working lifespan causes the necessity of definition of the actual stressstrain state of construction design, taking into account the results of inspection of its engineering status. static analysis of lining in this case is performed by finite elements method. In the article the example of such analysis is given. The tunnel is strengthened by the composite tunnel lining consisting of an inner layer of masonry body and a shotcrete outer layer built while rebuilding operation. In response to the inspection considerable variances of the actual lining concrete power of resistance from design value have been revealed, as well as local destructions of a lining and internal voids. It has been estimated that influence of lining concrete resistance power nonhomogeneity leads to decrease in carrying capacity on average by 17.3%. Consideration of inner and outer defects can reduce the carrying capacity by 2-3 times. While that sort of assessment not always allows to reveal dangerous processes in the considered geotechnical system and to realize effective protection measures promptly. In this case it is reasonable to use information modeling on the basis of BIM technologies. In relation to railway tunnels the further enhancement is needed. The following sequence of engineering status assessment of a tunnel while information modeling is proposed: carrying out essential geotechnical and geophysical researches on the route of a tunnel; tunnel structures monitoring system development and deployment, collection and analysis of data; regular control of a tunnel by the railcar with the measuring station; creation of a tunnel digital model, filling it with data, regular updating and checking calculations; development and implementation of essential repair actions.

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Section: Discussionmentioning

confidence: 99%

Assessment of the impact of railway tunnel lining defects with a long working lifespan on its carrying capacity

2017

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“…e radius of the new circular curve R n � R + ΔR and their difference is the new outer distance value E n . Since the offset does not change the deflection angle α of the horizontal curve, the inward displacement value P n of the new horizontal curve can be obtained from the outer distance in equation (6), where the transition curve length L Sn of the new horizontal curve can be obtained by equation (7), and the new curve angle β on can be obtained by equation (8). Afterward, the new tangent increment Q n can be obtained by equation ( 9), whereas the new tangent length T sn can be obtained by equation (10) and finally by equation (11), with the length of the curve being L n .…”

Section: When Dta Does Not Coincide With the Structurementioning

confidence: 99%

“…What is more, the GmBH VMT system even has a ring sequencing module to preset a projection of up to 10 rings [6]. However, as for the assembly simulation for an entire interval tunnel, there is no welldesigned program [7][8][9]. Besides, the majority of current research studies on precision focus on evaluating the erecting work quantification [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Study on the Universal Tapered Segmental Ring Assembly Simulation Algorithm and Deviation Assessment: A Case Study on Metro Line Tunnel

Zheng

Karlovšek

2021

Advances in Civil Engineering

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Universal tapered segmental ring system has been adopted to assemble tangent and curve line elements into the shield tunnels through the relative rotation of the adjacent front and rear rings, which simplifies the formwork design, demonstrates strong universality, and is easy for quality assurance. To evaluate the position deviation caused by the taper value and propose the assembly scheme for the contractor, this article developed the universal tapered segmental ring assembly simulation technology. Firstly, the assembly procedure of the universal tapered segmental ring system both in normal case and in special case is introduced, including the interval tunnel of special rings and actual engineering that needs deviation correction. Secondly, relevant core algorithms are introduced in detail, including the coordinate position algorithm of horizontal and vertical curves and computer graphic algorithm of spatial point rotating around any axis. Finally, this article takes a background metro line tunnel as a case to validate the algorithm and illustrate the assessment methodology of universal tapered segmental ring assembly accuracy. The sections with maximum deviation are found as an alert ahead of the shield advancing. In conclusion, the algorithms and methodology proposed in this article illustrate the excellent suitability and robustness in shield tunnels adopting a universal tapered segmental ring system in the stage of both design and construction.

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“…Исследования отечественных и зарубежных авторов в области геотехники посвящены не только совершенствованию методов возведения подземных сооружений, но и разработке технических решений по контролю и снижению негативного влияния подземного строительства на объекты городской инфраструктуры. В частности, в ряде работ рассматриваются методы мониторинга за деформациями грунтовых массивов и строительных конструкций в процессе подземного строительства [2,3]. Внимание уделено и вопросам обеспечения безопасности при освоении подземного пространства крупных мегаполисов [4][5][6][7][8][9].…”

Section: Introductionunclassified

Choice of technologies of ensuring exploitation suitability of buildings in the underground construction area

Alirzaev

Dement'eva

2020

Vestnik MGSU

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Introduction. One of the serious problems in the construction of underground structures in a dense urban area is the occurrence of excess deformations of the foundations of operating buildings that fall into the zone of influence of underground construction. The subject of the study was the calculated justification of the modern technology of compensatory injection. The relevance of the task is determined by the fact that the choice of the most effective protection technology should be based not only on a comparison of technological precipitation with maximum permissible values, but also on the assessment of the possibility of monitoring and controlling the movements of the foundations of buildings and structures during construction and subsequent operation. The purpose of the study was to compare various methods of protecting the foundations of existing buildings and structures and justify the selection of the most effective of them for further implementation and dissemination in the design and construction of urban underground structures. Materials and methods. On the basis of the survey data of the operated building falling into the impact zone of excavation of the pit for the construction of the installation and shield chamber of the subway, the parameters of the stress-strain state of its foundations are studied by mathematical modeling. The problem was solved by the finite element method based on the software and computer complex Z_Soil v.18.24. Results. Based on the analysis of the results of the examination of the administrative building using the finite element method, a change in the parameters of the stress-strain state of the foundations was modeled with various technologies for strengthening it. In the course of solving the geotechnical problem, it was found that the minimum impact on the foundations of the building during the construction of the pit was obtained in the method of compensatory injection. The system of criteria for making a decision on choosing an effective way to ensure the suitability of buildings in the underground construction zone for operation is substantiated. Conclusions. The results of this work can be used to justify the choice of technology for prevention and control of excess deformations of foundations. The function for calculating the volume of injected material in the Z_Soil software and computer complex can be used to justify the consumption of materials and the economic efficiency of the technological solution.

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Integrated Approach to Machine Guidance and OperationsMonitoring in Tunnel Construction

Abstract: -Tunnel construction method using a tunnel boring machine (TBM) is commonly adopted for building underground infrastructure, such as railways, roads, sewers, or utility pipelines.

Cited by 6 publications

References 6 publications

Assessment of the impact of railway tunnel lining defects with a long working lifespan on its carrying capacity

Assessment of the impact of railway tunnel lining defects with a long working lifespan on its carrying capacity

Study on the Universal Tapered Segmental Ring Assembly Simulation Algorithm and Deviation Assessment: A Case Study on Metro Line Tunnel

Choice of technologies of ensuring exploitation suitability of buildings in the underground construction area

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