期刊
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
卷 33, 期 3, 页码 -出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)MT.1943-5533.0003612
关键词
Polyurethane grouting; Fracture; Water pressure; Diffusion behavior; Model test
资金
- National Key Research and Development Plan [2016YFC0802207, 2018YFB1600200]
- Program for Science and Technology Innovation Talents in Universities of Henan Province [19HASTIT041]
- National Natural Science Foundation of China [51908514, 51878624, 51878622]
- Key Research Projects of Higher Education in Henan Province [18A580001]
- Natural Science Foundation of Henan Province [182300410116]
- Program for Innovative Research Team (in Science and Technology) at the University of Henan Province [18IRTSTHN007]
- Major Scientific and Technological Special Project in Henan [181100310400]
- Postdoctoral Research Sponsorship in Henan Province [19030026]
This study experimentally investigated the diffusion behavior of polyurethane grout in a water-bearing fracture, discussing the influences of grouting quantity and water pressure on grout diffusion distance. Results showed that the grout diffusion radius increases with the increase of grouting quantity, but decreases with the increase of hydrostatic pressure.
Polyurethane grouting can be used for antiseepage and reinforcement in underground construction. Understanding the diffusion characteristics of polyurethane grout is critical for good grouting design. However, the influence of water pressure on the diffusion of polyurethane grout is not clear. The aim of this work is to experimentally investigate the diffusion behavior of polyurethane grout in a water-bearing fracture. A series of laboratory experiments was conducted using a self-designed visual fracture grouting device under different conditions. The influences of grouting quantity and water pressure on grout diffusion distance and flow field are discussed. The results show that grout expansive diffusion and the pressure field change of the grout-water system have a phased characteristic. Also, the change of grout pressure is not synchronized with grout diffusion distance. The grout diffusion radius increases with the increase of grouting quantity, but decreases with the increase of hydrostatic pressure. The study helped gain insight into the performance of polyurethane grouting in fracture under static water condition.
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