Effect of Expanding a Rectangular Tunnel on Adjacent Structures

Wang, Yaqiong; Kong, Weikang; Wang, Zhifeng

doi:10.1155/2018/1729041

Cited by 6 publications

(4 citation statements)

References 46 publications

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“…To prevent the engineering disaster of ground buildings collapsing, researchers have thoroughly analyzed the deformation characteristics of structures through a combination of numerical simulation, on-site measurement, and monitoring techniques (Wang et al, 2018;Ayasrah et al, 2021;Ren et al, 2022;Wang et al, 2023). Fu (2021) utilized MIDAS/GTS software to assess the impact of shield tunneling on overlying buildings.…”

Section: Introductionmentioning

confidence: 99%

Construction stability analysis of intersection tunnel in city under CRD method

Ren,

Zhou,

Jia

et al. 2023

Front. Earth Sci.

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The construction of city intersection tunnels cause multiple redistribution of surrounding rock stress, resulting in the engineering disasters such as instability in existing tunnels and collapses of ground buildings. To mitigate formation disturbances effectively, the Center Cross Diagram (CRD) method is employed in city tunnel construction. In this study, a numerical model for a city intersection tunnel is developed based on an underground circular roads project in Chongqing, China, to analyze the safety of the tunnel structure and the stability of ground buildings under the CRD method. The numerical simulation results obtain that the excavation of pilot-tunnel ➃ will reduce the surrounding rock stress and control the rock strata subsidence, and reveal that the excavation of pilot-tunnel ➃ is the key step of CRD method. The maximum compressive stress and tensile stress of surrounding rock first increase and then decrease during the excavation of pilot-tunnels ➀, ➁, ➂, and ➃. Simultaneously, the deformation of the ground building experiences a slow initial increase followed by a rapid rise before stabilizing. Furthermore, the excavation of the main tunnel leads to an increase of 0.73, 0.35, and 0.52 times in the vault subsidence value, left haunch convergence value, and right haunch convergence value of branch tunnel #1, respectively. Finally, the convergence process of branch tunnel #1 is discussed through the in-situ monitoring, which is divided into three stages: rapid deformation, deceleration deformation, and stable deformation. The final horizontal convergence value and subsidence value of cross-section K0+360 are respectively 84% and 78% of those at cross-section K0+395.

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Section: Introductionmentioning

confidence: 99%

Construction stability analysis of intersection tunnel in city under CRD method

Ren,

Zhou,

Jia

et al. 2023

Front. Earth Sci.

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“…It has been estimated that the length of the tunnels constructed annually since 2013 reaches approximately 5200 km, and that the current tunnelling market represents 6-7% of the global infrastructure construction market. erefore, tunnelling has always been a significant focus of research in the area of civil engineering [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Ground Deformation Characteristics Induced by Mechanized Shield Twin Tunnelling along Curved Alignments

Guo

et al. 2021

Advances in Civil Engineering

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This paper investigates the ground deformation characteristics induced by mechanized shield twin tunnelling along curved alignments by adopting the nonlinear three-dimensional (3D) finite element method (FEM). The performance of the adopted FEM is demonstrated to be satisfactory by comparing the numerical analysis results with the field monitoring data in a typical case history and with the predicted results generated by a modified version of the Peck’s empirical Gaussian formula. It has been found that the tunnelling-induced transverse ground surface settlement troughs and the distributions of the subsurface horizontal and vertical ground displacements are mostly similar in both form and magnitude for the considered various radii of curvature of tunnel alignment including 50 m, 100 m, 150 m, 200 m, 250 m, 300 m, 400 m, and infinity (i.e., straight-line tunnel). Considering the variational characteristics of the ground deformations with the magnitude of the radius of curvature, the radius of curvature of 100 m can be regarded as a critical tunnel alignment radius of curvature controlling the transformation of the curved tunnelling-induced ground deformational behaviors. For the benefit of geotechnical engineers interested in curved tunnelling with a small radius of curvature, a discussion of the technologies for reducing the overexcavation and improving the accuracy of tunnel lining segment installation is also presented.

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“…To guarantee safe slope excavation and stable operation, monitoring and analysis of a slope is necessary. [9][10][11][12][13] In recent years, many experts and scholars have obtained many good research developments in monitoring systems. [14][15][16][17][18][19][20] Barsocchi et al 21 proposed a structural monitoring system by Internet-of-Things wireless sensing devices to monitor their state of health of the buildings.…”

Section: Introductionmentioning

confidence: 99%

Field monitoring on deformation of high rock slope during highway construction: A case study in Wenzhou, China

Wang

Zhang

Chen

et al. 2019

International Journal of Distributed Sensor Networks

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In order to study the deformation stability of rock slope during the excavation of cutting slope and ensure the safety of rock slope during construction and operation period, this article analyzed the deformation law of a typical slope excavation by monitoring the surface deformation and the internal displacement of the rock mass. The surface deformation of the slope is monitored by setting monitoring points, and the internal deformation of the slope is monitored by installing multipoint displacement meters and inclinometers. Therefore, the relationship between slope excavation and deformation is obtained. The analysis of monitoring results shows that the slope is stable before excavation, and the displacement of the slope is gradually increased with the slope excavation. After the excavation, the displacement of each slope tends to converge. The maximum displacement in surface monitoring points is 12.30 mm, and the displacement parallels to the direction of the expressway. The maximum vertical displacement in surface monitoring points is 10.60 mm which occurred in the third step; the maximum internal displacement is 11.02 mm which mainly occurs in the weak structural plane of the rock boundary. During the excavation of the weak rock slope, the slope rock mass is prone to large displacement deformation. After the excavation, the slope surface displacement and internal displacement tend to converge in a short time.

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Effect of Expanding a Rectangular Tunnel on Adjacent Structures

Cited by 6 publications

References 46 publications

Construction stability analysis of intersection tunnel in city under CRD method

Construction stability analysis of intersection tunnel in city under CRD method

Ground Deformation Characteristics Induced by Mechanized Shield Twin Tunnelling along Curved Alignments

Field monitoring on deformation of high rock slope during highway construction: A case study in Wenzhou, China

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