高压旋喷桩加固软基施工技术研讨

软弱地基处理,工程界积累的成熟方法有:人工挖孔灌注桩、钻孔灌注桩、静力压桩、软基换填、CFG桩、高压旋喷桩等。地基为淤泥、淤泥质土、砂土、黄土、软弱黏土等软弱土层时,采用高压旋喷桩加固处理地基,成桩效率高,成本低1]。针对漱玉花园小区天然地基砂土、粉质黄土特征,研究高压旋喷桩工艺流程、加固效果检测。施工和研究结果表明砂土、粉质黄土软弱地基,采用高压旋喷桩加固技术,大大提高了地基承载力,满足设计和规范要求。

DISCUSSION ON CONSTRUCTION TECHNOLOGY OF STRENGTHENING SOFT SOIL GROUND BY HIGH-PRESSURE ROTARY JET GROUTING PILE

Engineering field has accumulated many mature methods for soft foundation treatment,which include manual holing pouring piles,bored pile,static pressed pile,exchange filling soft foundation,CFG piles and high-pressure rotary jet grouting pile,etc. When the foundation has soft soil layer which includes silt,mucky soil,sandy soil,loess,soft clay and so on,solidified the foundation by high-pressure rotary jet grouting pile has the advantages of high efficiency pile-forming and low cost. According to the natural sand foundation and characteristics of silty loess of Rinse Jade Garden District,it was studied the technological process of high-pressure rotary jet grouting pile and the reinforced efficiency test. Construction and research results show that the bearing capacty of sand,silty loess soft foundation woald be greatly improved by using high-pressure rotary jet grouting pile,which could meet the design and code requirements.