Geotechnical monitoring on the stability of a pilot underground crude-oil storage facility during the construction phase in China

Qiao, Liping; Li, Shucai; Wang, Zhechao; Tian, Hao; Bi, Liping

doi:10.1016/j.measurement.2016.01.017

Cited by 42 publications

(7 citation statements)

References 15 publications

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“…During the construction and operation of the tunnel and underground engineering, it is crucial to guarantee the safety and stability of the surrounding rock and structure. e convergence displacement of the surrounding rock directly reflects the stability of a rock mass after excavation [1,2] and also provides support for the inversion of the rock mechanics parameters and the determination of a reasonable support time. erefore, convergence displacement monitoring of the surrounding rock and structure is an essential item for underground engineering deformation monitoring, and the applicability of monitoring methods and systems is of vital importance to guaranteeing safety during tunnel and underground engineering construction and operation.…”

Section: Introductionmentioning

confidence: 78%

A Novel Contact Tunnel Profile Monitoring System: Concept and Application

Han

Gao

et al. 2020

Mathematical Problems in Engineering

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The displacement of the cross section directly reflects the stress state and stability of the surrounding rock and structure, so the monitoring of it is essential during the construction and operation of the tunnel and underground engineering, particularly under the conditions of earthquake and other geological disasters. This paper introduces a new contact tunnel profile monitoring system (TPMS) in detail that uses a tilt sensor and a displacement sensor as data acquisition devices. According to the relation between the sensing physical quantity and displacement change, the displacement calculation formulas of the tunnel cross section measuring points based on the two-dimensional plane coordinate system were deduced, and in order to eliminate the actual installation and positioning deviation of the monitoring system, the method of obtaining the optimal monitoring plane and converting coordinates of the measuring points was proposed, thus establishing the theoretical basis for the application of the TPMS. With the Beishan exploration tunnel (BET) in China as the test platform, the TPMS was successfully applied for long-term monitoring. The application experience showed that the TPMS can realize continuous monitoring, automatic collection and transmission of the monitoring data, remote access whenever necessary, without affecting the transportation in the tunnel, and high accuracy, which reaches 0.01 mm. This system provides a new simple and effective method with good generality and applicability for the deformation monitoring of the tunnel and underground engineering.

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Section: Introductionmentioning

confidence: 78%

A Novel Contact Tunnel Profile Monitoring System: Concept and Application

Han

Gao

et al. 2020

Mathematical Problems in Engineering

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“…The displacement meter is then connected to the measuring rod. (7) The multipoint displacement meter base is encased in cement mortar and secured to the surface once it solidifies. (8) The signal line of each displacement meter is connected to the automatic acquisition box, which is powered by solar energy and a battery, to achieve the timed automatic acquisition.…”

Section: Installation and Operation Of Sensorsmentioning

confidence: 99%

“…Sato et al [6] not only studied the displacement, strain, vibration frequency, and propagation velocity of surrounding rock caused by cavern construction, but also compared the influence range of mechanical excavation and drilling-and-blasting excavation on the stress state of the surrounding rock. Qiao et al [7] measured the surrounding rock displacement for the entire process of tunnel construction by establishing multipoint displacement meters in advance, and analyzed the spatial effect of the excavation surface. Li et al [8] used a self-developed multipoint displacement tester to monitor the full vertical displacement of the rock surrounding the vault and the ground-surface settlement, and studied the full displacement variation law for the rock surrounding the vault in the shallow buried section.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Surrounding Rock Full-Displacement Variation in Large-Span Mudstone Highway Tunnels

Chi,

Luo,

Chen

et al. 2024

Symmetry

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Due to the increasing development of highway reconstruction and expansion projects in China, many large-span highway tunnels are being constructed near existing highway tunnels. Tunneling underneath will inevitably cause variation in the surrounding rock displacement and may even lead to collapse. In this study, based on an analysis of extensive field monitoring data from the Gucheng tunnel, the variation law for the surrounding rock full-displacement and the influence of the tunnel-face spatial effect in a large-span mudstone tunnel are analyzed. The change in the full displacement experienced the following sequence: slow pre-displacement growth → rapid increase → slow increase → gradual stability. The displacement released by the excavation of the tunnel construction accounts for 40~60% of the total displacement, and the closer to the excavation contour, the more obvious the displacement release. The final convergence value of vertical displacement is obtained by hyperbolic function regression prediction analysis. Based on this value, Lee and Hoek equations are used for parameter analysis and field-data fitting. It is concluded that the larger the proportion of the early displacement of the surrounding rock before construction to the total displacement, the smaller the influence of the tunnel-face spatial effect on the surrounding rock. The numerical simulation results are compared with actual monitoring results, and good agreement is observed. The larger the burial depth of the tunnel, the smaller the influence range in the tunnel-face spatial effect, and the more concentrated the displacement release. The variation law and the influential range for the surrounding rock full-displacement described in this paper can provide a reference for predicting and controlling the deformation during the construction of future large-span mudstone tunnels.

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“…Underground water-sealed caverns are of strategic significance for energy resource storage (e.g., gas [1], oil [2]) owing to their advantages, including considerable capacities, reliable structural safety and limited land resource occupation. Surrounding rock quality is a primary factor determining the structural stability of these storage caverns [3], thereby requiring monitoring strategies and rock reinforcement approaches.…”

Section: Introductionmentioning

confidence: 99%

2D Wavelet Decomposition and F-K Migration for Identifying Fractured Rock Areas Using Ground Penetrating Radar

Yang

Duan

2021

Remote Sensing

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The quality of the surrounding rock is crucial to the stability of underground caverns, thereby requiring an effective monitoring technology. Ground-penetrating radar (GPR) can reconstruct the subterranean profile by electromagnetic waves, but two significant issues, called clutter and hyperbola tails, affect the signal quality. We propose an approach to identify fractured rocks using 2D Wavelet transform (WT) and F-K migration. F-K migration can handle the hyperbola using Fourier analysis. WT can mitigate clutter, distinguish signal discontinuity, and provide signals with a good time-frequency resolution for F-K migration. In the simulation, the migration result from horizontal detail coefficients highlight the crack locations and reduce the scattering signals. Noise has been separated by 2D WT. Hyperbola tails are decomposed to vertical and diagonal detail coefficients. Similar promising results have been achieved in the field measurement. Therefore, the proposed approach can process GPR signals for identifying fractured rock areas.

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Geotechnical monitoring on the stability of a pilot underground crude-oil storage facility during the construction phase in China

Cited by 42 publications

References 15 publications

A Novel Contact Tunnel Profile Monitoring System: Concept and Application

A Novel Contact Tunnel Profile Monitoring System: Concept and Application

Analysis of the Surrounding Rock Full-Displacement Variation in Large-Span Mudstone Highway Tunnels

2D Wavelet Decomposition and F-K Migration for Identifying Fractured Rock Areas Using Ground Penetrating Radar

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