China Institute of Water Resources and Hydropower Research

Powerchina Northwest Engineering Corporation Limited

Shu Yu

Zuyu Chen

Fan Yue

Qiang Zhang

Wei Cao

Peng Li

Yanlong Li

Heng Zhou

Aiping Wang

Wenxin Yang

Jiawei Zhou

Weiqin Dang

Pengyi Liu

Zongjun Han

Qiang Xue

Yumei Guo

Wugang Gao

Yanfeng Wen

Xueying Liu

Laizhang Zhang

Xiaowei Liang

Penghai Yin

Zhanbin Li

Naichang Zhang

Jianqin Wang

Maosheng Zhang

Jianwei Hao

Zhaohui Xia

Yongxiang Cao

Ziyu Lv

Zheng Si

Xiaomei Kou

A method for monitoring and safety evaluation of a dam body defect of a check dam is provided, including steps of: obtaining multi-source remote sensing data, unmanned aerial vehicle (UAV) data, ground monitoring data and sensing images through a three-dimensional data network; identifying the sensing images through an R-CNN algorithm and a Fast R-CNN based on the UAV data and check dam body database to determine check dams having defects and types of defects, defect data and position data; performing classification statistics of the check dams having defects according to the types of defects; building a three-dimensional model of the dam body safety evaluation standards for check dams after classification according to the position data and the ground monitoring data; input the defect data in a check dam safety performance evaluation module to obtain simulation data; and completing the evaluation according to the simulation data and the three-dimensional model.

Method and system for monitoring and safety evaluation of dam body defect of check dam

A composite polyester hot-melt adhesive, a preparation method thereof and a preparation method of an anti-scouring geotextile are provided. The preparation method of the composite polyester hot-melt adhesive includes the following steps: performing an esterification reaction on a dibasic acid and a dihydric alcohol under a protection of nitrogen and an action of a titanium/cobalt composite catalyst, adding a stabilizer for a polycondensation reaction to obtain a polyester hot-melt adhesive, then adding polymethyl methacrylate (PMMA) microspheres for mixing and stirring to obtain the composite polyester hot-melt adhesive. The anti-scouring geotextile is obtained by bonding a polyethylene terephthalate woven fabric with a polypropylene geotextile by the composite polyester hot-melt adhesive. The composite polyester hot-melt adhesive has the advantages of high bonding strength and good anti-impact performance, and the prepared anti-scouring geotextile has the advantages of high anti-scouring strength, good soil conservation performance, strong protection capability and long service life.

Composite polyester hot-melt adhesive and preparation method thereof and preparation method of anti-scouring geotextile

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Beijing, China

Shu Yu