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In this chapter, the factors affecting the stress arching action in the core were investigated using the conventional three‐dimensional finite element method, and a new parameter, which can be used to decide the occurrence of the hydraulic fracturing, was presented. The factors affecting the occurrence of the hydraulic fracturing in the earth‐rock fill dams were also investigated by analyzing the J integral using the suggested numerical method in the Chapter 7. The following conclusions can be drawn: (1) Increasing either the Young's modulus or the Poisson's ratio of the core soil is helpful to reduce the stress arcing action. (2) Increasing the core thickness may result in the reduction of the arcing action. (3) Decreasing the core slope or the bank rock‐bed slope may reduce the stress arcing action. (4) Increasing any of the Young's modulus, the Poisson's ratio and the density of the core soil is helpful to reduce the likelihood of the occurrence of the hydraulic fracturing. (5) The likelihood of the occurrence of the hydraulic fracturing increases with increasing the water level or the crack depth. (6) The lower part of the dam core is the zone in which the phenomenon of the hydraulic fracturing may be induced easily.
In this chapter, the factors affecting the stress arching action in the core were investigated using the conventional three‐dimensional finite element method, and a new parameter, which can be used to decide the occurrence of the hydraulic fracturing, was presented. The factors affecting the occurrence of the hydraulic fracturing in the earth‐rock fill dams were also investigated by analyzing the J integral using the suggested numerical method in the Chapter 7. The following conclusions can be drawn: (1) Increasing either the Young's modulus or the Poisson's ratio of the core soil is helpful to reduce the stress arcing action. (2) Increasing the core thickness may result in the reduction of the arcing action. (3) Decreasing the core slope or the bank rock‐bed slope may reduce the stress arcing action. (4) Increasing any of the Young's modulus, the Poisson's ratio and the density of the core soil is helpful to reduce the likelihood of the occurrence of the hydraulic fracturing. (5) The likelihood of the occurrence of the hydraulic fracturing increases with increasing the water level or the crack depth. (6) The lower part of the dam core is the zone in which the phenomenon of the hydraulic fracturing may be induced easily.
Factors Affecting Hydraulic Fracturing
Wang, Jun‐Jie (author)
2014-03-10
27 pages
Article/Chapter (Book)
Electronic Resource
English
Factors influencing efficiency of hydraulic fracturing
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| Engineering Index Backfile | 1954
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A Comprehensive Numerical Study of Hydraulic Fracturing Process and Its Affecting Parameters
| Online Contents | 2017
| Engineering Index Backfile | 1957