Hydraulic fracturing: a main cause of initiating internal erosion in a high earth-rock fill dam

被引：9

作者：

Salari, Morteza ^{[1
]}

Akhtarpour, Ali ^{[1
]}

Ekramifard, Amin ^{[1
]}

机构：

[1] Ferdowsi Univ Mashhad, Dept Civil Engn, Mashhad, Razavi Khorasan, Iran

来源：

INTERNATIONAL JOURNAL OF GEOTECHNICAL ENGINEERING | 2021年 / 15卷 / 02期

关键词：

Earth dams; hydraulic fracturing; internal erosion; load transfer; SUFFUSION; STABILITY;

D O I：

10.1080/19386362.2018.1500122

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The Bidvaz dam is an earth-rockfill dam located in the northeast of Iran. About seven and a half years after the start of the first impounding, a subsidence appeared on the surface of the dam. Evaluation of the dam behavior based on the data recorded by its instruments confirms the occurrence of internal erosion in the lower parts of the core. Hydraulic fracturing phenomenon has been hypothesized as a main cause of initiating erosion in this dam. Thus, the main purpose of this research was to evaluate the possibility of this hypothesis. To achieve this aim, first the behavior of the dam was simulated with a three-dimensional numerical model. Then, the safety factor against the hydraulic fracturing in the upstream face of its clay core was calculated. The results showed that being located on a steeply sloped narrow valley has caused significant stress transfer from core near the abutments. This has caused the safety factor of these regions against the phenomenon to be less than unity.

引用

页码：207 / 219

页数：13