The Types of Tunnels Maintenance in  Umbrella Arch Method

Rostami, Arash; Dehkordi, Parham Kamali; Ziarati, Morteza Askari; Jahani, Saman; Lotfi, Kamran

doi:10.4236/ojce.2016.62014

Cited by 11 publications

(9 citation statements)

References 7 publications

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“…Arch support methods and its techniques are very conventional and economical in tunnel excavation, and are being used to increase the excavation front sustainability, minimize the land subsidence, and prevent debris rocks falling into the tunnel [15]. The geological conditions and the stability of the rock mass in which a tunnel or cavern is to be excavated are probably the greatest sources of risk in a project involving underground construction.…”

Section: Arch Support Methodsmentioning

confidence: 99%

Classification and selection methodology for temporary support systems for underground structures

Manoj¹,

Jitendra²,

Naithani³

2016

Proceedings of the Conference on Recent Advances in Rock Engineering (RARE 2016)

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In this paper a new methodology for evaluation and classification of support system that can be applied to rock tunneling is discussed. It is of great importance to consider long-term stability of rock mass around the openings of underground structure, during design, construction and operation. Varying geological conditions can lead to complications with respect to any underground excavations. The support system may be designed based on empirical, analytical and numerical methods. The support should be installed immediately after the excavation, delayed causes deformation. In this context, many temporary support techniques are chosen to perform as pre-support that can be installed during the first face of excavation around of underground openings. Temporary support used before the excavation for poor rock mass quality to increase the stand-up time by making generally an arch. These supports can also be installed during the excavation and in this paper Arch Method is discussed. Three types of techniques are used in arch method viz. forepoles, grouted arch & spiles. This method is highly recommended and proven system that can be installed within tunnel excavation.

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Section: Arch Support Methodsmentioning

confidence: 99%

Classification and selection methodology for temporary support systems for underground structures

Manoj¹,

Jitendra²,

Naithani³

2016

Proceedings of the Conference on Recent Advances in Rock Engineering (RARE 2016)

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“…Musivand and AskariZiyarati (2014) [10] investigate earth level settlement of tunnel digging by inserting harmonic loads with various frequencies and state that right and left side of settlement curve changes from sloppy to horizontal state by increase in frequency. [11] investigate the effect of tunnel maintenance on surface settlement. Rostami et al [11] (2016) evaluated the effect of tunnel maintenances on surface and concluded that an umbrella method had significant effect on surface.…”

Section: Introductionmentioning

confidence: 99%

“…[11] investigate the effect of tunnel maintenance on surface settlement. Rostami et al [11] (2016) evaluated the effect of tunnel maintenances on surface and concluded that an umbrella method had significant effect on surface. Rostami et al [12] (2016) evaluated effect of tunnels with different shapes on ground acceleration and conducted that the rectangular tunnel have a significant effect on ground responses.…”

Section: Introductionmentioning

confidence: 99%

Investigating Effect of Tunnel Gate Shapes with Similar Cross Section on Inserted Forces on Its Coverage and Soil Surface Settlement

Rostami¹,

Asghari²,

Ziarati³

et al. 2016

OJCE

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According to technology development and relative facilitation in digging and underground structures, ways, highways, all types of tunnels, underground train network, and other underground settle, storage are number of structure built and developed in advanced countries. In most situation, tunnel digging operations are done years after its construction or are not recorded in new structures regulations; therefore, this research investigates soil settlement and inserting force to tunnel coverage by limiting studies about effects of tunnel shapes on soil settlement using Plaxis, Seismo Signal, and Seismo Aspect. This study shows that rectangular tunnel has the most settlement in soil surface and circular tunnel has the least settlement but horseshoe tunnel has similar behavior to circular tunnel; however, earth subsidence level by digging this tunnel is more than circular tunnel. In addition, sectional shape has direct effect on inserting forces on tunnel coverage.

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“…They also noted that the earthquake acceleration domain has an important role in determining the acceleration of earth's surface earthquake reduction; so with increasing acceleration amplitude, earthquake acceleration decreases at ground level [17]. Rostami et al (2016) [18] studied the types of tunnel maintenances and its effect on surface acceleration. They studied on Sadr-Niayesh tunnel and stated that digging tunnel causes the increase in earthquake acceleration at ground level and at top of the tunnel, and that stresses around the tunnel become increased [19].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Seismic Behavior and Earth’s Surface Acceleration, by Interaction of Tunnels with Different Shapes and Different Types of Soils

Rostami

Ziarati

Shahi³

et al. 2016

OJCE

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With the increasing population and the consequent needs for transport facilities, the construction of tunnels in urban environments is fast growing. Tunneling at each depth of the soil, causes changes in the earth's surface; this is more important about urban areas tunnels, especially when crossing the residential areas, so having knowledge of their performance is really important. Some of the consequences of underground tunneling are earth surface moving around the tunnel, movement of tunnel's surrounding and changes in earthquake acceleration. The performance and behavior of underground structures have been studied by numerous researchers, but the effect of tunneling on earthquake records and its effects on aboveground structures have been getting less attention. The current article will try to study and examine the changes in seismic velocity at ground level, structural response spectrum, and Fourier spectrum with digging a circular tunnel. The results show that digging a circular tunnel at ground level will cause a change in the earthquake records profile.

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The Types of Tunnels Maintenance in Umbrella Arch Method

Cited by 11 publications

References 7 publications

Classification and selection methodology for temporary support systems for underground structures

Classification and selection methodology for temporary support systems for underground structures

Investigating Effect of Tunnel Gate Shapes with Similar Cross Section on Inserted Forces on Its Coverage and Soil Surface Settlement

Evaluation of Seismic Behavior and Earth’s Surface Acceleration, by Interaction of Tunnels with Different Shapes and Different Types of Soils

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