high rockfill dam
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2021 ◽  
Vol 11 (23) ◽  
pp. 11505
Author(s):  
Haimin Wu ◽  
Luming Feng ◽  
Zhaoming Teng ◽  
Yiming Shu

The cushion of a geomembrane surface barrier of a high rockfill dam built on deep overburden is prone to crack and fail because of excessive flexural deformation. This study proposes a geomembrane surface barrier for a high rockfill dam on deep overburden. The proposed geomembrane surface barrier uses polyurethane bonded aggregates as the cushion material. The loading and deformation performance of the barrier system under uniform water pressure was investigated using a self-developed structure model test device. The mechanical and deformation property of each layer of the barrier, and the interaction mode between adjacent layers, were obtained through external videos and internal sensor monitoring. The results demonstrated that the polyurethane bonded aggregate cushion exhibited good adaptability to flexural deformation during the entire loading process and maintained good contact and coordinate deformation with the upper protective and the lower transition layers. The geomembrane surface barrier created using polyurethane bonded aggregates as the cushion material can adapt to the flexural deformation of a high rockfill dam surface on deep overburden.


2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Xiaolong Lv ◽  
Shichun Chi

The safety of rockfill dams during initial impoundment has always been an issue of interest for regulatory agencies. Specifically, it is necessary to identify potential tensile strain zones and shear strain concentration zones in which cracks may form. In this paper, a meshless smoothing method is proposed to construct the strain field of a prototype dam based on monitoring displacement data. For verification, this method is applied to calculate the strain field of the Nuozhadu core wall rockfill dam. The results show that the proposed method can provide regulatory agencies with an effective tool for dam inspection during initial impoundment.


2017 ◽  
pp. 175-180
Author(s):  
Lihong Chen ◽  
Tianming Zhang ◽  
Tianhong Lin ◽  
Xiaoguang Zhou ◽  
Zuyu Chen

2015 ◽  
Vol 187 ◽  
pp. 32-44 ◽  
Author(s):  
Reza Mahinroosta ◽  
Ali Alizadeh ◽  
Behrouz Gatmiri

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