混凝土电杆冻胀裂缝的探讨

Discussion on Frost Heaving Cracks of Concrete Poles

混凝土电杆冻胀裂缝在全国乃至世界寒冷地区均出现过,但在地下水位高的地区尤为突出,宁夏黄灌区正好符合这一特定条件,在工程验收中发现了较多的混凝土电杆出现冻胀裂缝。本文对混凝土电杆冻胀裂缝形成的原因进行了分析和探讨,提出了冰冻膨胀是从电杆内部空腔形成的新观点。为了证实这一观点,提出了进行冰冻膨胀观测实验的建议,并提出了观测实验的具体方法和防治电杆冻胀裂缝的措施。

Frost heaving cracks of concrete poles happened in cold areas in our country or even over the world.The situation is particularly outstanding in the areas with high groundwater level,and Huangguan area in Ningxia Province is fitted for this particular condition.During the engineering acceptance,frost heaving cracks are appeared in many concrete poles.The reasons for forming the frost heaving cracks for concrete poles are analyzed and investigated in this paper,and a new viewpoint of forming freezing expansion cracks by cavity inside the poles is put forward.To prove this new viewpoint,the proposal of observation experiment for freezing expansion is proposed.Meanwhile,specific methods of observation experiment and measures of preventing frost heaving cracks for concrete poles are provided.