Numerical Analysis and Deformation Mechanism Study on an Excavated High‐Steep Slope of a Hydropower Station

Shi, Guangcheng; Wang, Yifeng; Wang, Yingkui; Tao, Zhigang; Wan, Li‐Jun; Xi, Lanyun

doi:10.1155/2020/3402762

Cited by 5 publications

(4 citation statements)

References 34 publications

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“…With the development of numerical simulation techniques, various strength reduction methods have been proposed to analyze the stability of slopes and stress parameters of slope structures. Several examples include strength reduction methods based on finite element and finite difference techniques [33][34][35][36]. ey represent useful tools for the analysis of the interactions between the high slopes and the corresponding structures under complex conditions.…”

Section: Loading Wallmentioning

confidence: 99%

Effects of Landslides on the Displacement of a Bridge Pile Group Located on a High and Steep Slope

Zhang

et al. 2021

Advances in Civil Engineering

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Engineering practice shows that the deformation of the slide-resistant pile may be transferred to the adjacent bridge foundation on an inclined slope, which can compromise the safety of the entire bridge. However, this phenomenon has rarely been considered in the past. To reveal the deformation transfer mechanism between the slide-resistant pile and the adjacent structures, a full-scale field test was performed on a high and steep slope located in a section of a certain railway. A numerical analysis model was constructed to simulate the field test and validate its parameters. Moreover, parametric analysis was also conducted to examine the influence of the pile length, pile diameter, and arrangement of the pile foundation. The results show that the bridge pile foundation is simultaneously affected by the “load transfer effect” caused by the slide-resistant pile and “traction effect” of the sliding slope. With the distance between the pile foundation and the slide-resistant pile increasing, the dominant factor affecting the deformation mode of the pile body is switched from the “load transfer effect” to the “traction effect.” Furthermore, a critical embedment depth exists for the bridge pile foundation built on a high and steep slope, which varies at different locations along the inclined stratum. In addition, using a pile arrangement with a larger pile diameter and lower number of piles is more beneficial for controlling the horizontal displacement of the bridge foundation. The results of the research provide a reference for the safety control of the engineering on the high and steep slope.

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Section: Loading Wallmentioning

confidence: 99%

Effects of Landslides on the Displacement of a Bridge Pile Group Located on a High and Steep Slope

Zhang

et al. 2021

Advances in Civil Engineering

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“…When Gong et al [10] looked into how pipe diameter affected the local resistance coefficient of the tee, their findings showed that the bigger diameter T-type tee's local resistance coefficient was much lower than that of the standard diameter tee. The local resistance coefficient of tees was examined by Chen et al [11,12], taking certain pipe materials into consideration. The effect of the main-side pipe angle on the local resistance coefficient of tees was investigated by Shang et al [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Local Resistance Characteristics of T-Type Tee Based on Chamfering Treatment

Liu,

Li,

Jiang

et al. 2023

Sustainability

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The T-type tee is a crucial part of liquid distribution systems and is widely used in irrigation, drainage, water delivery, and agricultural fertilizer injection, among other areas. Confluence angle, pipe diameter ratio, and flow rate ratio have been the main focus of previous research. Research on the hydraulic characteristics and resistance optimization brought about by the main-side pipe intersection’s chamfering treatment is, nevertheless, incredibly rare. Optimizing the structure of the T-type tee could improve its sustainability in many aspects, such as its energy consumption, durability, and production process. In order to fill this void in the literature, the current investigation concentrated on the resistance reduction and flow properties of T-type tees by means of chamfering treatment. Using a newly proposed coefficient called the integrated local resistance coefficient, the integral flow characteristics and resistance reduction effects of T-type tees were addressed. Through the use of the verified computational fluid dynamics (CFD) method, the crossed effects of five chamfer ratios (R = 0D, 0.5D, 1D, 2D, and 3D), nine flow rate ratios (0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, and 0.9), and two pipe diameter ratios were examined. When the Reynolds number exceeded 3 × 105, the flow remained in the quadratic drag region, meaning that the local resistance coefficient of T-type tees was no longer dependent on the flow velocity. In both confluence and shunt conditions for equal tees, chamfering treatment was proven to be an efficient method for reducing local resistance under these conditions. For instance, following a 1D chamfering treatment on the T-type confluence tee, at a flow ratio of 0.5, the local resistance coefficients ζ1 and ζ2 dropped by 68% and 82%, respectively, in comparison to the 0D condition. The effects of resistance reduction were improved by a wider chamfer radius and a higher side pipe flow rate ratio. The highest overall performance was obtained by chamfering a T-type tee with a curvature radius of 1D, taking into account flow characteristics, sustainability, processing technology, economic cost, and promotion difficulties. The chamfering procedure produced a more noticeable reduction in resistance for unequal tees with comparable velocities in the main and side pipes when the pipe diameter ratio was greater than 0.5.

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“…Furthermore, considerable attempts to evaluate the stability of the rock slope have had a certain process. The stability of the high and steep rock slopes forms very important engineering geological issues for slope engineering of road and bridge, large scale water conservancy, and hydropower projects (Lin et al 2018 ; Shi et al 2020 ). In order to reduce the risk of disasters, a monitoring system is an effective way.…”

Section: Introductionmentioning

confidence: 99%

The field survey and deformation characteristics of exit slope of Qingshuigou tunnel in the southwest of China

Wen

Tang

2022

Arab J Geosci

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The stability of the slope under excavation in various engineering is a hot issue, and both engineering disturbances and other internal factors have contributed to the instability of the slope. The study focused on the deformation characteristics mechanism of exit slope of Qingshuigou tunnel in Jiasha Town, Gejiu City, Honghe Prefecture, Yunnan, China. Field survey and monitoring are performed to reveal deformation mechanism of the exit slope, which is associated with hydrogeologic conditions, natural weathering, and excavation activities. The exit slope at the interface of the overburdened layer and bedrock has the possibility of landslide through the joint force of rainfall and artificial construction. According to the deformation characteristics of the exit slope and monitoring analysis, the results indicate that the surface displacement at the back scarp of the exit slope is larger than that at the head scarp of the exit slope. The deep displacement at the back scarp is 2–4 times of that at the head scarp of the slope. Based on the geophysical analysis, the overburdened layer mostly has low resistivity. The deformation mechanism of the exit slope is revealed ultimately based on the combined influences of hydrogeologic conditions, natural weathering, and excavation activities. Based on the deformation characteristics and mechanism of the exit slope, comprehensive stabilization treatment measures are proposed to prevent the exit slope from further deformation.

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Numerical Analysis and Deformation Mechanism Study on an Excavated High‐Steep Slope of a Hydropower Station

Cited by 5 publications

References 34 publications

Effects of Landslides on the Displacement of a Bridge Pile Group Located on a High and Steep Slope

Effects of Landslides on the Displacement of a Bridge Pile Group Located on a High and Steep Slope

Local Resistance Characteristics of T-Type Tee Based on Chamfering Treatment

The field survey and deformation characteristics of exit slope of Qingshuigou tunnel in the southwest of China

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