设有活动器材的运动场地通常要求依据安全下落高度来设计活动器材的安装高度。临界跌落高度与地面材料的硬度、缓冲度有极大关系。目前，运动地面铺设材料普遍采用运动地坪代替传统水泥地面，运动地坪具有一定的缓冲性，有利于防止跌落造成损伤。运动地坪包含全塑型运动地坪、混合型运动地坪、现浇型运动地坪、预制型运动地坪、人造草运动地坪等。本文通过不同的下落高度试验，以拟合曲线方式得到临界跌落高度，以此对不同类型的运动地坪的临界跌落高度性能进行对比研究。

Usually, in the sports ground with sports equipment, it is required to design the installation height of sports equipment according to the safe falling height. The critical falling height is greatly related to the hardness and cushioning of ground materials. At present, the traditional cement floor is commonly replaced by the sports floor, which has certain cushioning and is more conducive to prevent injuries caused by falling. Sports floors include whole-polyurethane sports floor, mixed sports floor, cast-in-place sports floor, prefabricated sports floor, artificial turf sports floor, etc. In this paper, the critical falling height performance of different types of sports floors is obtained and compared by fitting the curves at different drop heights.

TB302