为查明佑君镇图幅范围内安宁河谷第四系物质结构特征、砂土液化等级、砂土液化分布范围以及对液化区域内的建筑和场地的影响; 根据以上目的, 依照相关规范要求对安宁河谷分布砂土、粉土层进行液化判断, 主要研究手段有收集区域内相关工程资料、河谷两侧布置勘探孔、水文地质调查等, 并结合原位测试、室内实验对区域分析得出区域内液化土的分布范围、砂土液化等级, 并绘制砂土液化等值线图。结果表明区域内表层砂土分布大多以透镜体、夹层出现, 大部分砂土埋深大于10m, 且砂土层分布呈南北区域性分布; 北侧砂土较少大部区域无砂土层, 南侧砂土层分布明显集中, 大部埋深大; 并查明液化区域及液化等级严重区主要集中在河谷南部区域 (杨家河坝—李所一带) , 呈椭圆形沿安宁河谷分布, 其余区域液化等级为轻微~中等; 通过该区域砂土液化研究, 为后续该区域工程建设规划提供理论依据。

In order to find out the structural characteristics of the substance of the Quaternary, the liquefaction grade of sandy soil, the distribution of sandy soil liquefaction and the influence on the buildings and fields in the liquefaction area in the Anning River valley within the map area of Youjun Town, the liquefaction of sandy soil and pulverized soil layers distributed in the Anning River Valley is judged according to the requirements of relevant specifications. The main research means include collecting relevant engineering data in the region, arranging exploration holes on both sides of the river valley, hydrogeological investigation, etc. , obtaining the regional distribution and grade of sand and soil liquefaction through in-situ tests, indoor experiments and analysis, and drawing the sandy soil liquefaction contour sheet. The results show that the distribution of surface sandy soil in the region is mostly lenticular and interbedded, most of the sandy soil is buried deeper than 10m, and the distribution of sandy soil layers is regional from north to south. It is also ascertained that there is less sandy soil on the north side and no sandy soil layer in most of the area, the distribution of sandy soil layer on the south side is obviously concentrated, most of them are buried deeper; and the liquefaction area and the area with serious liquefaction grade are mainly concentrated in the southern part of the river valley (Yangjiaheba-Lisuo area) , which is oval-shaped and distributed along the Anning River Valley, while the liquefaction grade in the rest of the area is in the range from slight to moderate. The study of sand and soil liquefaction in this area will provide the theoretical basis for the subsequent engineering construction planning in this area.