粉喷桩加固技术在深基坑被动区支护中的应用  

Application of dry jet mixing pile(DJMP)in support of passive area in deep foundation pits

作　　者：陶宏亮[1,2] 范士凯 徐光黎[2] 屈若枫[2] 

机构地区：[1]武汉华太岩土工程有限公司,湖北武汉430074 [2]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《人民长江》2013年第22期56-59,共4页Yangtze River

摘　　要：为研究深基坑被动区粉喷桩加固在武汉软土地区深基坑支护中的应用效果,以武汉地区某大型深基坑工程为背景,以现场监测数据为基础,采用FLAC软件建立二维模型并进行数值模拟分析。分析结果表明:采用数值模型能够较好地模拟支护桩实际变形规律;被动区的阶梯式加固可以有效控制支护桩位移;粉喷桩加固强度存在最优值,即当加固体强度处于一定范围内时,加固效果最理想;对于武汉地区软弱土层,适当的被动区加固有明显的优势,且具有较强的适用性,研究成果对于武汉地区同类型工程具有重要参考价值。In order to study application effect of dry jet mixing pile （DJMP） support in passive area of deep foundation pits in Wuhan soft soil ground, aiming at a typical deep foundation pit in Wuhan, we establish a two - dimensional model by FLAC. The results show that the numerical simulation can calculate the actual deformation of the supporting piles with a satisfying accuracy; stepped support in the passive zone can control displacement of the piles effectively; an optimal range of reinforcement strength of DJMP can be found, which means the optimum improving effect of DJMP can be obtained if a reasonable reinforcement strength is chose; for soft soil ground in Wuhan, appropriate reinforcement measures in passive zone have obvious advantages with good applicability.

关 键 词：基坑 被动区加固 位移影响 粉喷桩 

分 类 号：P642[天文地球—工程地质学]