Study on Sand Liquefaction in the Anning River Area of Youjun Town

Abstract

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.