陕北榆林地区砂土地基处理与加固技术分析

Analysis on Treatment of Sand Foundation in Yulin Area and the Reinforcement Technology

陕北榆林地区,地处毛乌素沙漠的南端,地表覆盖着大面积的风积砂,由于砂土的厚度大,造成砂土地基的承载力很低,一般在40kPa^90kPa,不经过处理与加固的砂土地基不能作为建筑物持力层。榆林地区目前处理砂土地基的主要办法有深层搅拌法、振冲法和水泥粉煤灰碎石桩法等。本文综合榆林地区的地理条件,结合砂土地基的特点,探讨了榆林砂土地基处理与加固的技术方法。

The northern region of Yulin is located in the southern tip of Maowusu Desert, and its ground is covering a large area of eolian sand. The sand thickness is too large, resulting in very low of bearing capacity of the sandy soil, generally in the range of 40kPa- 90kPa, so without any treatment and reinforcement, sand soil can not be the bearing layer of buildings. The main measures for the treatment of sandy soil foundation in Yulin area include deep mixing method, vibroflotation method and cement flyash gravel pile method. In this paper, with the Yulin geographical conditions, combined with the characteristics of sand foundation, it discusses the technical method of Yulin sand soil foundation treatment and reinforcement.