Analysis model for deformation mechanism of strip foundation of building: Considering shear effect of down-crossing tunnel under excavation

Wu, Tingyao; Jiang, Nan; Zhou, Chuanbo; Xia, Yuqing; Zhang, Yuqi; Zhu, Bin

doi:10.1007/s11771-021-4786-7

Cited by 8 publications

(4 citation statements)

References 48 publications

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“…where: 𝑘 = 10; 𝑟 , 𝑟 , 𝑟 are relevant parameters, this paper takes 𝑟 = 𝑟 , 𝑟 = 12𝑟 ; 𝜇 = 0.25 is the rock Poisson's ratio [35][36][37][38]. By calculating the above formula and referring to existing literature [39][40][41], the peak value of the blasting load is less than 20 MPa, as shown in Fig. 5.…”

Section: Blast Loading Methodsmentioning

confidence: 99%

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Mathematical simulation modeling analysis of sub-sea tunnel blasting based on grey correlation

Ling,

Ding,

2024

J. vibroeng.

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Blasting in the ocean tunnel has a great impact on Marine life and seabed vegetation, so it is necessary to control the impact of blasting vibration on the surrounding Marine environment. In this paper, taking Xiamen Tunnel as an example, the blasting vibration response characteristics of undersea tunnel are studied, and the velocity attenuation rules of tunnel structure in different directions are obtained. The grey correlation theory is innovatively applied to analyze the correlation degree of factors affecting the blasting vibration effect of the undersea tunnel, and the key factors and secondary factors affecting the blasting vibration effect of the tunnel are determined. The grey correlation theory is used to analyze the correlation degree between the blasting vibration effect of the cross-tunnel, which is conducive to improving the safety and stability of tunnel construction. It provides a new idea and method for vibration control of similar projects.

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Section: Blast Loading Methodsmentioning

confidence: 99%

“…where 𝜌 is the density of the water after disturbance, 𝜌 is the initial density of water, 𝐸 is the specific internal energy, 𝛾 is the GRUNEISEN factor, and 𝑆 , and 𝑆 , 𝑆 are slope factor of VS-VP [40][41].…”

Section: Blast Loading Methodsmentioning

confidence: 99%

Mathematical simulation modeling analysis of sub-sea tunnel blasting based on grey correlation

Ling,

Ding,

2024

J. vibroeng.

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show abstract

“…As a result, more and more scholars began to keep focus on these influence [9,10]. Due to the expansion of the tunnel crack, it will lead to the instability of the rock mass [11,12].…”

Section: Introductionmentioning

confidence: 99%

Interactions of Foundation Pit on the Underlying Adjacent Existing Underground Structures

Liu

Liu³

et al. 2022

Geofluids

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The influence of foundation pit excavation on deformation and stability of the supporting structure of underlying adjacent existing tunnel is a comprehensive geotechnical engineering problem, including unloading effect of foundation pit excavation and the coupling effect of deformation of the tunnel surrounding rock and supporting structure. Using numerical calculation methods, this paper changes the different excavation depths and widths of foundation pit and discusses the evolution law about force and deformation of tunnel supporting structure, and the changing relationship of the axial force of tunnel anchor with the distance between foundation pit and tunnel is obtained and compares the influence of different excavation way of foundation pit on the axial force of anchor rod near the existing tunnel. It is found that with the increase of distance between foundation pit and tunnel, the axial force of anchor rod at the top of tunnel under the foundation pit entirely symbolizes a trend of increases first and then decreases, the axial force of the leftmost anchor rod changes from pressure to tension, then decreases gradually. When the foundation pit depth increases, the axial force of the anchor rod at the top of the tunnel increases, the axial force of the leftmost anchor rod decreases, and the width of foundation pit absolutely has little effect on the axial force of the leftmost and the top tunnel.

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“…It is a common method to evaluation the safety of the building by the deformation of the building or the inclination angle with the ground (Lipecki, 2022 ), but the damage to the building by the earthquake can often lead to more complex deformation, which makes the post-earthquake environment building safety inspection is difficult. Usually, the maximum inclination direction of building is further collapse direction (Wu et al, 2021 ). Therefore, it is important to accurately reflect the maximum inclination direction of the building by adjusting the camera shooting angle.…”

Section: Introductionmentioning

confidence: 99%

Distributed Small-Step Path Planning and Detection Method for Post-earthquake Robot to Inspect and Evaluate Building Damage

Tang

Wang

et al. 2022

Front. Neurorobot.

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Post-earthquake robots can be used extensively to inspect and evaluate building damage for safety assessment. However, the surrounding environment and path for such robots are complex and unstable with unexpected obstacles. Thus, path planning for such robot is crucial to guarantee satisfactory inspection and evaluation while approaching the ideal position. To achieve this goal, we proposed a distributed small-step path planning method using modified reinforcement learning (MRL). Limited distance and 12 directions were gridly refined for the robot to move around. The small moving step ensures the path planning to be optimal in a neighboring safe region. The MRL updates the direction and adjusts the path to avoid unknown disturbances. After finding the best inspection angle, the camera on the robot can capture the picture clearly, thereby improving the detection capability. Furthermore, the corner point detection method of buildings was improved using the Harris algorithm to enhance the detection accuracy. An experimental simulation platform was established to verify the designed robot, path planning method, and overall detection performance. Based on the proposed evaluation index, the post-earthquake building damage was inspected with high accuracy of up to 98%, i.e., 20% higher than traditional unplanned detection. The proposed robot can be used to explore unknown environments, especially in hazardous conditions unsuitable for humans.

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Analysis model for deformation mechanism of strip foundation of building: Considering shear effect of down-crossing tunnel under excavation

Cited by 8 publications

References 48 publications

Mathematical simulation modeling analysis of sub-sea tunnel blasting based on grey correlation

Mathematical simulation modeling analysis of sub-sea tunnel blasting based on grey correlation

Interactions of Foundation Pit on the Underlying Adjacent Existing Underground Structures

Distributed Small-Step Path Planning and Detection Method for Post-earthquake Robot to Inspect and Evaluate Building Damage

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