A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Polystyrene Insulation for Concrete Canal Lining
Frost heave has caused much damage to concrete canal structures on the Riverton Irrigation Project in Wyoming, and an extensive rehabilitation program is in progress. Experiments with polystyrene insulation to control frost penetration have been conducted at the project. On a small lateral section, during the winter of 1976-77, 50-mm-thick polystyrene insulation was attached to the surface of 65-mm-thick concrete lining; temperatures in the soil beneath the insulation and lining were measured. A thermocouple system showed that frost penetrated approximately 50 and 130 mm beneath the insulated lining on sun-exposed and shaded sides, respectively, compared with 700 and 800 mm on comparable locations of a nearby uninsulated section. Frost did not penetrate beneath the insulated bottom of the lateral, but did penetrate about 400 mm beneath the uninsulated bottom. The water table was near the bottom of the lateral. Frost did not penetrate significantly beneath the 50-mm-thick polystyrene covered with 150 mm of loose soil in a ground area beside the lateral. Dye-filled frost gages installed in uninsulated ground areas beside the lateral showed that frost penetrated from 860 to more than 1400 mm in tree-shaded areas compared to 600 to 750 mm for an unshaded area. The freezing index for this winter was about normal but the freezing duration was shorter than normal.
Polystyrene Insulation for Concrete Canal Lining
Frost heave has caused much damage to concrete canal structures on the Riverton Irrigation Project in Wyoming, and an extensive rehabilitation program is in progress. Experiments with polystyrene insulation to control frost penetration have been conducted at the project. On a small lateral section, during the winter of 1976-77, 50-mm-thick polystyrene insulation was attached to the surface of 65-mm-thick concrete lining; temperatures in the soil beneath the insulation and lining were measured. A thermocouple system showed that frost penetrated approximately 50 and 130 mm beneath the insulated lining on sun-exposed and shaded sides, respectively, compared with 700 and 800 mm on comparable locations of a nearby uninsulated section. Frost did not penetrate beneath the insulated bottom of the lateral, but did penetrate about 400 mm beneath the uninsulated bottom. The water table was near the bottom of the lateral. Frost did not penetrate significantly beneath the 50-mm-thick polystyrene covered with 150 mm of loose soil in a ground area beside the lateral. Dye-filled frost gages installed in uninsulated ground areas beside the lateral showed that frost penetrated from 860 to more than 1400 mm in tree-shaded areas compared to 600 to 750 mm for an unshaded area. The freezing index for this winter was about normal but the freezing duration was shorter than normal.
Polystyrene Insulation for Concrete Canal Lining
C. W. Jones (author) / B. M. Laymon (author)
1978
30 pages
Report
No indication
English
Canal lining of reinforced concrete
Engineering Index Backfile | 1902
Slip forms for concrete canal lining
| Engineering Index Backfile | 1952
Concrete lining for Narmada main canal
| Online Contents | 1994
Canal lining concrete in-situ casting method and non-linear canal lining construction method
| European Patent Office | 2020