摘要:近年来广河县买家巷镇蔡家窑降水频繁,受降水影响,买家巷镇蔡家窑新农村东侧沟道右岸斜坡前缘部分发生了小型的滑塌,堵塞坡脚的沟道,洪水翻过沟岸进入蔡家窑新农村积水深度达约30cm,造成了一定的危害,严重威胁新农村区段居民生命与财产安全。故本文旨在介绍广河县买家巷镇蔡家窑不稳定斜坡发育特征,对该滑坡的治理有一定的借鉴意义。
关键词:蔡家窑;不稳定斜坡;发育特征
Development characteristics and deformation influencing factors of unstable slope in Caijiayao,buyers lane town,Guanghe County
Fan-Peng Ju
Geological Survey of Gansu Province,Lanzhou,730000
Abstract: In recent years,the front part of the slope on the Right Bank of the Gully on the east side of Caijiayao new village in Caijiayao town,Guanghe County,suffered from frequent rainfall,blocking the gully at the foot of the slope,the depth of water accumulated in the new rural area of Caijiayao is about 30 cm,which has caused some damage and threatened the safety of the residents in the new rural area. The purpose of this paper is to introduce the characteristics of the development of the unstable slope in Caijiayao,buyer lane town,Guanghe County,and to provide some references for the control of this landslide.
Key words: Caijiayao;unstable slope;developmental characteristics
不穩定斜坡(滑坡)作为广河县常见的地质灾害类型,其预警、治理一直是困扰该县地质灾害治理的难题,特别是2018年7月-8月临夏州降水频繁,引发了大量的地质灾害,广河县灾情、险情严重。基于此背景,本文从临夏州选取具有迫切治理必要性的广河县买家巷镇蔡家窑不稳定斜坡作为研究对象,重点研究和分析了该不稳定斜坡的发育特征,为该不稳定斜坡(滑坡)的预警和治理可以提供重要的参考依据。
1.自然地理环境概况
1.1地理位置
蔡家窑不稳定斜坡位于广河县买家巷镇蔡家窑新农村东侧。该不稳定斜坡大致为南北展布,区行政上属广河县买家巷镇管辖区。蔡家窑新村区地理坐标:东经103°26′15″,北纬35°26′15″。
1.2气象水文
广河县属于陇中南部冷温带半湿润区,其气候特点为:春夏温和,秋季凉爽,冬季寒冷干燥,气温日差较大,降水分布不均匀。
据广河县气象站资料,年平均气温6.4℃,最高气温32.6℃,最低气温-21.6℃,年平均降水量493.5mm。根据近五十年境内外气象站多年降水资料统计,区域内多年降水量400mm~650mm,且由南向北逐渐减少,买家巷、庄禾集一带在600mm以上,到三甲集一带降为400mm左右。……