Abstract
There is a large amount of backfilled earth on both sides of the wall and the top of the lower wall of the Daning Reservoir’s cutoff wall, which is greatly disturbed by the project, and the safety of the cutoff wall needs to be evaluated. Based on the deformation law and stress condition of rigid cutoff wall during construction, according to the connection characteristics of rigid cutoff wall and plastic cutoff wall structure, the stress analysis of rigid cutoff wall is carried out by using field measurement data, so as to deduce the deformation law of plastic cutoff wall underneath, and evaluate the safety of plastic cutoff wall. The results show that the plastic cutoff wall is mainly affected by compressive stress, and the maximum compressive stress is far less than the allowable compressive stress, which indicates that the plastic cutoff wall is safe and stable during the whole construction period, although it is affected by construction and rigid cutoff wall.
Highlights
IntroductionThe cutoff wall of Beijing Daning Reservoir is composed of plastic concrete wall ( lower wall ) buried underground and newly built reinforced concrete wall ( upper wall )
The cutoff wall of Beijing Daning Reservoir is composed of plastic concrete wall buried underground and newly built reinforced concrete wall
E-Mail: wangyu@mail.xhu.edu.cn (*Corresponding author) parameters; Liu Guangming, et al[9] based on the existing test and measured parameters, the three-dimensional numerical simulation of the construction effect of backfill soil on both sides of the cutoff wall of Daning Reservoir is carried out; Gao Jianglin et al[10] used ABAQUS finite element software to establish the numerical model of seepage and stress coupling; Huang Chenjie, et al[11] used the finite difference software FLAC3D to simulate the influence of the penetration depth of the suspended cutoff wall in the double-layer embankment foundation on the seepage deformation; Liu Guangming et al[12] carried out real-time dynamic automatic continuous monitoring of various stress effects in the construction process of filling impervious wall
Summary
The cutoff wall of Beijing Daning Reservoir is composed of plastic concrete wall ( lower wall ) buried underground and newly built reinforced concrete wall ( upper wall ). Wen Lifeng et al[1] studied the mechanical properties of concrete cutoff wall of dam foundation from the perspective of statistical analysis; Wu Mengxi, et al[2] carried out dynamic coupling simulation analysis of seepage and stress deformation on upstream cofferdam of Lawa hydropower station; Zhang Biliang et al[3] put forward the construction method of basalt fiber reinforced TRD cutoff wall by using TRD construction method of cement soil mixing method to break through the system; Wang Yuanming, et al[4] proposed a detection method based on elastic wave image method for the integrity detection of cutoff wall; Xu Han, et al [5] studied the influence of rigid-flexible normal contact on the stress of concrete cutoff wall; Liang Yan et al[6] conducted numerical simulation analysis on the cutoff wall of dam foundation of Longkaikou Hydropower Station; Liu Haojie, et al[7] took a reservoir as an example, and carried out seepage control and three-dimensional numerical analysis of deep overburden earth-rock dam; Chen Xiaolian et al[8] based on the foundation pit pumping test of a hydropower station on the Dadu River in Sichuan Province; and judged the anti-seepage effect of the cutoff wall by calculating the
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
