基于数据统计的西南农村房屋边坡演变规律分析

Analysis of Evolution Law in Rural Housing Slope of Southwest China Based on Data Statistics Method

我国西南地区丘陵地带的农村切坡建房活动频繁,屋后常形成陡立的边坡,汛期此类边坡极易发生剥落掉块。为总结出农村房前屋后边坡发育特征和演变规律,研究团队对潼南区各种边坡的类型和边坡形态等特征数据进行分析。结果表明:潼南区农村的屋后边坡均为岩质边坡,而土质边坡位于房前,为填方边坡。有隐患边坡约占边坡总数的2.0%,以岩质边坡为主。边坡在各个乡镇的分布不均匀,卧佛镇和五桂镇的边坡数量及边坡密度均较大。边坡集中分布在中丘和深丘地貌区,切坡高度多在4—10m,坡度多数大于60°,岩质边坡主要有4种变形破坏模式。

Cutting slope for building house are frequent in hilly areas of southwest China,where steep slopes are often formed behind houses.Slope peeling behind house is very vulnerable to occur during the flood season.In order to summarize the development characteristics and evolution law of the slope in the front or the back of the houses,characteristic data of various slope types and slope shapes were acquired on the basis of searching every inch of the village.The statistical results show that the slopes behind the house are all rock slopes in Tongnan district,and the soil slope located in front of the house is filling slope.Slopes with hidden dangers account for about 2.0%of the total number of slopes,which is predominated by rock slopes.The slopes are unevenly distributed in each township.For instance,there is a considerable change for slope quantity and slope density of Wofo town and Wugui town.The slopes,whose cutting slope height is mostly 4—10m and the incline greater than 60°,are concentrated in the medium and deep hills landform.Furthermore,there are four main deformation and failure modes of rock slope.