| 冻结时间/d | 主孔区域温度/℃ | 辅孔区域温度/℃ | ||
| 保温 | 未保温 | 保温 | 未保温 | |
| 30 | 20 | −2.2 | 11.2 | −2.2 |
| 60 | 10.4 | −8.7 | 8.8 | −8.7 |
| 120 | 3.67 | −23.6 | −1.7 | −24 |
| 210 | −2.2 | −30 | −13.3 | −30 |
| 360 | −8.3 | −30 | −25.3 | −30 |