Transverse joint aperture simulation of high arch dam based on measured temperature in construction period

By utilizing the transverse joint opening and closing iteration technique and the finite element method based on the discontinuous deformation theory for manifolds, and with the help of measured data in situ of temperature, stress and displacement and so on during the construction period, the dynamic tracing feedback simulation/analysis was carried out to the temperature field and the stress field. On this basis, a series of effective safety control measures and methods were systematically put forward, which are beneficial to safety construction in the high temperature season and winter, improvement of the safety coefficient for restrained zones, lowering the cracking risk of low gradation concrete in portholes, ensuring the transverse joints aperture and groutability as well as effective control of the cantilever height and so on; and good effects have been obtained in the engineering practice and the important guarantee may be provided for the overall safety of Xiluodu Super-high arch dam.

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Study on the Drafting and Early-Warning of Temperature Double-Control Index of Different Sections & Periods of Concrete Block

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.188.253 ◽

2012 ◽

Vol 188 ◽

pp. 253-258

Author(s):

Dong Sheng Shen ◽

Yao Ying Huang ◽

Yi Hong Zhou ◽

Dan Dan Liu ◽

Xiang Ze Gao

Keyword(s):

Prediction Model ◽

Probabilistic Method ◽

Concrete Block ◽

Arch Dam ◽

Maximum Temperature ◽

Measured Temperature ◽

Dynamic Feedback ◽

High Arch Dam ◽

Concrete Blocks ◽

Real Time Tracking

Although real-time tracking and feedback were carried out for the dam concrete construction process, there was still certain blindness in the construction units. The temperature double-control index, which is the allowable temperature and temperature gradient under typical age before concrete block reaching its maximum temperature, was proposed in this paper on the basis of the analysis of measured temperature process curves of concrete blocks. The probabilistic method was applied to draft the temperature double-control index of different sections and periods based on the measured temperature process curve of the poured block of a constructing extra-high arch dam in southwest China. Furthermore, the prediction model was also provided and applied in the dynamic feedback of new pouring block. It is demonstrated by the practice that the prediction model proposed in this paper has better pertinence and maneuverability for the construction units to control the maximum temperature of concrete block, i.e. the maximum temperature in high temperature season and in low temperature season are both controllable.

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Temperature Rebound Influenced by Environment Temperature Analysis of the Irrigated Area of a High Arch Concrete Dam under Constrcution

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.580-583.2045 ◽

2014 ◽

Vol 580-583 ◽

pp. 2045-2049 ◽

Cited By ~ 1

Author(s):

Xun Hui Chen ◽

Yao Ying Huang ◽

Bai Lin Xu ◽

Dan Dan Liu ◽

Xiao Bin Wei

Keyword(s):

Thermal Conductivity ◽

Arch Dam ◽

High Arch Dam ◽

Concrete Dam ◽

Construction Period ◽

Average Temperature ◽

Environment Temperature ◽

Dam Site ◽

Heat Preservation ◽

Annual Average Temperature

For a temperature rebound in the irrigated high arch dam during the construction period, using finite element method to research the influence of environment temperature to temperature rebound of the irrigated high concrete arch dam. Assuming that the initial temperature of the dam concrete is the joint grouting temperature. This paper presents a simulation of the temperature rebound of the high arch dam which is caused by the monthly average environment temperature, and performs sensitivity analysis to research the influence of thermal conductivity and surface heat preservation on the temperature rebound. According to the analysis,when the high arch dam sealing temperature is lower than the dam site annual average temperature, the dam site temperature inevitably would flow backward,slowly,to the irrigation area.The larger the thermal conductivity is,the quicker the temperature rebound speed will be. And benzene board insulation can reduce concrete temperature rebound rate, if the heat preservation benzene board is thicker,the temperature rebound rate is smaller.

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Study on Mechanism of Crack on Upstream Surface of Super-High Arch Dam

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.438-439.1325 ◽

2013 ◽

Vol 438-439 ◽

pp. 1325-1328

Author(s):

Jun Feng Guan ◽

Long Bang Qing ◽

Juan Wang ◽

Wei Feng Bai ◽

Yu Hu

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Stress Concentration ◽

Three Dimensional ◽

Arch Dam ◽

High Arch Dam ◽

Transverse Joint ◽

Dimensional Finite Element ◽

Three Dimensional Finite Element ◽

Element Method

A kind of crack with similar characteristics has been discovered on the upstream surface of super-high arch dam. In this paper, the reason of cracking was analyzed by the three-dimensional finite element method. It is found that the stress concentration of concrete near the water-stop structure led to the concrete initial cracking in the process of transverse joint open.

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Study on Method for Controlling Opening and Closing Mechanism of Transverse Joint of Super-high Arch Dam

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/510/5/052083 ◽

2020 ◽

Vol 510 ◽

pp. 052083

Author(s):

Liu Youzhi ◽

Zhang Guoxin ◽

Fan Qixiang ◽

Chen Wenfu ◽

Li jintao

Keyword(s):

Arch Dam ◽

High Arch Dam ◽

Transverse Joint ◽

Opening And Closing ◽

Closing Mechanism

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

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/826/1/012035 ◽

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

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

Science and Engineering of Composite Materials ◽

10.1515/secm-2021-0043 ◽

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.

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