scholarly journals Development and Application of Recycled Concrete using the Great Particle of Demolished Concrete—Replacing the Concrete in the Bottom of Discharge Facilities in Hamanose Dam Construction Site—

2014 ◽  
Vol 52 (2) ◽  
pp. 179-184
Author(s):  
J. Matsumoto ◽  
K. Tao ◽  
M. Kubo ◽  
Y. Yamada
Keyword(s):  
Recycled Concrete ◽  
Dam Construction ◽  
Construction Site

Study on the gallery structure cracking mechanisms and cracking control in dam construction site

2021 ◽  
Vol 121 ◽  
pp. 105135
Author(s):  
Peng Lin ◽  
Zeyu Ning ◽  
Jie Shi ◽  
Chang Liu ◽  
Wenfu Chen ◽  
...  
Keyword(s):  
Dam Construction ◽  
Construction Site ◽  
Cracking Control ◽  
Cracking Mechanisms

scholarly journals Integrated Geophysical-Geological 3D Model of the Right-Bank Slope Downstream from the Rogun Dam Construction Site, Tajikistan

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Hans-Balder Havenith ◽  
Isakbek Torgoev ◽  
Anatoli Ischuk
Keyword(s):  
Layer Thickness ◽  
Mass Movement ◽  
Geophysical Survey ◽  
Slope Instability ◽  
Dam Construction ◽  
Construction Site ◽  
Spectral Ratios ◽  
Soft Layer ◽  
Bank Slope ◽  
The Right

In summer of 2015 we had completed a geophysical survey complemented by borehole drilling near the right-bank slope of the Rogun Dam construction site, Tajikistan. These data were first processed and then compiled within a 3D geomodel. The present paper describes the geophysical results and the 3D geomodel generated for an ancient mass movement located immediately downstream from the construction site. The geophysical survey included electrical and seismic profiles and ambient vibration measurements as well as earthquake recordings. The electrical and seismic data were processed as tomographic sections, the ambient vibrations as horizontal-to-vertical spectral H/V ratios, and the earthquake data mainly in terms of standard spectral ratios. By estimating the average shear wave velocities of the subsurface, we computed the local soft layer thickness from the resonance frequencies revealed by the H/V ratios. Three seismic stations had been installed for ten days along a profile crossing the intermediate plateau. Standard spectral ratios inferred from ten processed earthquake measurements confirmed the presence of a thick soft material layer on the plateau made of weathered rocks, colluvium, and terrace deposits, which produce a medium-level amplification at about 2 Hz. The 3D geomodel was first built on the basis of new topographic data, satellite imagery, and a geological map with two sections. Then, the various electrical resistivity and seismic refraction tomographies were inserted in the geomodel. The soft layer thickness information and borehole data were represented in terms of logs in the model. The site is crossed by the Ionakhsh Fault that could be modeled on the basis of the geological inputs and of a lateral resistivity gradient found on one electrical profile along the steep lower slope. The integrated interpretation of all results reveals that probably only a relatively small part of the ancient giant mass movement is really exposed to slope instability phenomena.

scholarly journals A Rapid Gradation Detection System for Earth and Stone Materials Based on Digital Image

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Shu Yu ◽  
Yanfeng Wen ◽  
Zuyu Chen ◽  
Guoying Zhang ◽  
Yujie Wang ◽  
...  
Keyword(s):  
Digital Image ◽  
Detection System ◽  
Detection Algorithm ◽  
High Accuracy ◽  
Dam Construction ◽  
Construction Site ◽  
Construction Sites ◽  
Edge Detection Algorithm ◽  
Stone Materials ◽  
Transport Vehicle

Gradation has an important influence on the mechanical properties of earth and stone materials after compaction, and a reasonable gradation is the key to ensure compaction quality. In this paper, a set of earth and stone materials gradation detection system based on digital image processing was proposed, which was suitable for detection in the construction sites. The system obtained images which were taken from multiple directions of materials transport vehicle, used the thresholding method to segment the images, detected particle contours through edge detection algorithm of Canny to realize the image recognition of particle size, and drew the gradation curve of earth and rock materials finally. It was verified by selecting limestone aggregates of different gradations, and the results showed high accuracy. The system can realize on-site detection of the earthwork gradation rapidly and accurately at a dam construction site.

Geophysical Investigation of the Landslide-Prone Slope Downstream from the Rogun Dam Construction Site (Tajikistan)

2017 ◽  
pp. 75-84
Author(s):  
Torgoev Isakbek ◽  
Havenith Hans-Balder ◽  
Torgoev Almaz ◽  
Cerfontaine Philippe ◽  
Ischuk Anatoly
Keyword(s):  
Dam Construction ◽  
Construction Site ◽  
Geophysical Investigation
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