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黑龙江省汤原县属季节性冻土区,最大冻深2.31米。以往修建的涵闸工程常常由于基础冻害而破坏,去年这个县在振兴灌区工程建设中,有3处涵闸工程(双兴涵洞、江堤涵洞及双兴二直斗渠分水闸)采用了聚苯乙烯塑料泡沫板做基础保温。实践效果很好,既提高了基础抗冻能力,又收到明显的经济效益。塑料泡沫板保温基础设计的关键在于设计泡沫板的厚度,水平保护长度和竖向保护长度。这些尺寸均依据黑龙江省水利科学研究所的实验定型成果计算确定。
Tangyuan County, Heilongjiang Province is a seasonal frozen soil, the largest deep frozen 2.31 meters. In the past year, there were 3 culvert gates (Shuangxing culvert, Jiangdi culverts and Shuangxing No.2 strait gate gates) in the construction of Zhenxing Irrigation District last year, using the polystyrene plastic Foam board to do the basic insulation. Practical effect is very good, not only improve the basic antifreeze capacity, but also received significant economic benefits. The key to the basic design of plastic foam insulation is the design of foam board thickness, horizontal protection length and vertical protection length. These dimensions are based on the Heilongjiang Institute of Water Conservancy Science experimental results confirmed.