scholarly journals Analysis of the influence of asymmetric geological conditions on stability of high arch dam

2021 ◽  
Vol 28 (1) ◽  
pp. 426-436
Author(s):  
Zelin Ding ◽  
Xuanyi Zhu ◽  
Hongyang Zhang ◽  
Hanlin Ban ◽  
Yuan Chen
Keyword(s):  
Safety Factor ◽  
Negative Impact ◽  
Decisive Role ◽  
Arch Dam ◽  
Test Method ◽  
Stable Operation ◽  
High Arch Dam ◽  
Reinforcement Scheme ◽  
Structural Plane ◽  
Geological Conditions

Abstract Geological conditions play a decisive role in the stability of arch dam engineering, and the asymmetric geological conditions of the abutment have a very negative impact on the safety of the arch dam. This article takes Lizhou arch dam as the research object, and determines that the arch dam is preliminarily affected by the geological asymmetric characteristics. Through the geomechanical model test method, the overload failure test of the Lizhou arch dam was carried out, and the resistance body, the instability deformation of the structural plane of the two dam abutments, and the influence of each structural plane on the dam body are obtained, and the safety factor is determined. According to the test results under the condition of asymmetric foundation of arch dam, for the structural plane which affects the geological asymmetry of the arch dam, the corresponding reinforcement measures are carried out. The feasibility of the reinforcement scheme is verified by the finite element method, and the safety factor after reinforcement is obtained. According to the results, it is suggested that some engineering measures can be taken to reduce the geological asymmetry between the two banks and ensure the safe and stable operation of the arch dam in the future.

Dynamic Stability and Reinforcement Effect Analyses of Dagangshan High Arch Dam Abutment

2012 ◽  
Vol 594-597 ◽  
pp. 1922-1931
Author(s):  
Qiong Yang ◽  
Jian Hai Zhang ◽  
Jing Dong Shao ◽  
Man Lin Li
Keyword(s):  
Dynamic Stability ◽  
Seismic Intensity ◽  
Arch Dam ◽  
Maximum Height ◽  
Reinforcement Effect ◽  
Safety Factors ◽  
High Arch Dam ◽  
Spring Element ◽  
Geological Conditions ◽  
Left And Right

The maximum height of Dagangshan arch dam is 210m. Its geological conditions are complex. The basic seismic intensity of the dam is VIII. The crest value of earthquake acceleration that 100 years beyond the probability of 2% is 0.5575g. Using the rigid body-spring element method, this paper simulated Dagangshan arch dam’s abutment dynamic stability under earthquake action. Searching the governing sliding bodies and evaluating the reinforcement effect. The results show that under the action of earthquake, the left and right bank’s key slide blocks are L1 and R2 respectively. Before reinforcement, their minimum instantaneous dynamic safety factors dropped from 5.053 and 3.076 of static values to 1.045 and 0.922 respectively. After the pre-stressed anchor cable reinforcement on the left and right abutment, the minimum instantaneous dynamic safety factors of blocks L1, R2 are raised up to 1.091 and 1.145 respectively, meeting the requirements of designing value, the reinforcement measures are very effective.

Study on real working performance and overload safety factor of high arch dam

2008 ◽  
Vol 51 (S2) ◽  
pp. 48-59 ◽  
Author(s):  
GuoXin Zhang ◽  
Yi Liu ◽  
QiuJing Zhou
Keyword(s):  
Safety Factor ◽  
Arch Dam ◽  
High Arch Dam ◽  
Working Performance

scholarly journals Deformation Monitoring of Geomechanical Model Test and Its Application in Overall Stability Analysis of a High Arch Dam

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Baoquan Yang ◽  
Lin Zhang ◽  
Enlong Liu ◽  
Jianhua Dong ◽  
Honghu Zhu ◽  
...  
Keyword(s):  
Model Test ◽  
Deformation Monitoring ◽  
Arch Dam ◽  
Test Method ◽  
Geomechanical Model ◽  
High Arch Dam ◽  
Arch Dams ◽  
Overall Stability ◽  
The Stability ◽  
High Arch Dams

Geomechanical model testing is an important method for studying the overall stability of high arch dams. The main task of a geomechanical model test is deformation monitoring. Currently, many types of deformation instruments are used for deformation monitoring of dam models, which provide valuable information on the deformation characteristics of the prototype dams. However, further investigation is required for assessing the overall stability of high arch dams through analyzing deformation monitoring data. First, a relationship for assessing the stability of dams is established based on the comprehensive model test method. Second, a stability evaluation system is presented based on the deformation monitoring data, together with the relationships between the deformation and overloading coefficient. Finally, the comprehensive model test method is applied to study the overall stability of the Jinping-I high arch dam. A three-dimensional destructive test of the geomechanical model dam is conducted under reinforced foundation conditions. The deformation characteristics and failure mechanisms of the dam abutments and foundation were investigated. The test results indicate that the stability safety factors of the dam abutments and foundation range from 5.2 to 6.0. These research results provide an important scientific insight into the design, construction, and operation stages of this project.

Application of Limit Equilibrium Method to Stability Analysis of Jinping I High Arch Dam Abutment on 3d Multi-Grid Method

2013 ◽  
Vol 405-408 ◽  
pp. 499-506
Author(s):  
Jing Wei Li ◽  
Chen Chen ◽  
Wei Wei
Keyword(s):  
Safety Factor ◽  
Limit Equilibrium ◽  
Temperature Drop ◽  
Three Dimensional ◽  
Grid Method ◽  
Arch Dam ◽  
High Arch Dam ◽  
Element Analysis ◽  
The Right ◽  
Reinforcement Measures

Based on nonlinear finite element analysis, three-dimensional elastoplastic numerical simulation of Jinping I high arch dam is developed. By using the method of multiply mesh, the stress result of FEM is transferred to any sliding surface (flat or curved), and the safety factors of sliding blocks are computed. The elastic-plastic calculation results indicate that the stress and displacement distributions are basically symmetrical to the river valley. The minimal safety factor of the left abutment under the basic condition is 4.88(larger than 3.5), which appears in the 1740m elevation in the temperature drop condition. However, the minimal safety factor of the right abutment under the basic condition is 3.41(less than 3.5), appearing in the 1710m elevation in the temperature rise condition, which means the necessity of the reinforcement measures to the right abutment.

scholarly journals Research on concrete temperature control measures in deep hole area of super high arch dam

2021 ◽  
Vol 826 (1) ◽  
pp. 012035
Author(s):  
Yuchen Fu ◽  
Yaosheng Tan ◽  
Chunfeng Liu ◽  
Lei Pei ◽  
Yajun Wang ◽  
...  
Keyword(s):  
Temperature Control ◽  
Arch Dam ◽  
Control Measures ◽  
Deep Hole ◽  
High Arch Dam ◽  
Hole Area ◽  
Concrete Temperature

Effect of the impounding process on the overall stability of a high arch dam: a case study of the Xiluodu dam, China

2015 ◽  
Vol 8 (11) ◽  
pp. 9023-9041 ◽  
Author(s):  
Danni Luo ◽  
Peng Lin ◽  
Qingbin Li ◽  
Dong Zheng ◽  
Hongyuan Liu
Keyword(s):  
Arch Dam ◽  
High Arch Dam ◽  
Overall Stability

Reasonable Strength Criterion Research of High Arch Dam Based on Brittle Failure Constitutive Relation

2014 ◽  
Vol 578-579 ◽  
pp. 964-967
Author(s):  
Zhi Qiang Wang ◽  
Wen Biao Liu
Keyword(s):  
Constitutive Relation ◽  
Brittle Failure ◽  
Concrete Strength ◽  
Safety Evaluation ◽  
Strength Criterion ◽  
Arch Dam ◽  
Dam Failure ◽  
Dam Safety ◽  
High Arch Dam ◽  
Triaxial Strength

The brittle failure finite element method is widely used in arch dam safety evaluation, but it also has some problems, the concrete strength criterion is different, the dam failure range is different. This article first introduces brittle failure constitutive relation and three strength criterions, then takes a high arch dam as an example to compute, obtains some conclusions that the relative failure range of foundation plane corresponds to blaxial strength criterion is slightly bigger than the result of uniaxial strength criterion, is almost the same as the result of triaxial strength criterion. Because the influence of the third principal stress is compressed stress to the dam crack is taken into account under multiaxial strength criterion, therefore using multiaxial strength criterion is more reasonable.

Study on deformation and force of a super high arch dam during impoundment period in Southwest China

2021 ◽  
Author(s):  
Yuchen Fu ◽  
Yaosheng Tan ◽  
Yu Hu ◽  
Chunfeng Liu ◽  
Lei Pei ◽  
...  
Keyword(s):  
Southwest China ◽  
Arch Dam ◽  
High Arch Dam
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