(铜陵学院建筑工程学院， 铜陵 244000)

［摘要］借助离心模型试验和室内模型试验，对影响基坑抗突涌稳定性的隔水层性质、桩类型及平面布置、基坑平面尺寸等因素进行了系统研究。研究结果表明：上海地区的灰色淤泥质黏土隔水层易发生整体顶升破坏，暗绿色粉质黏土隔水层发生表面砂沸破坏的概率较大；基坑内存在桩时，基坑主要发生接触面涌水、涌砂破坏；在保证灌注桩施工质量以及预制桩与周围土体充分固结的情况下，桩对基坑抗突涌稳定性具有积极的作用；同时基坑平面尺寸对基坑抗突涌稳定性也具有明显作用。

［关键词］软土地区; 基坑; 突涌; 隔水层性质; 基坑平面尺度

中图分类号：TU447，TU473文献标识码：A文章编号：1002-848X(2014)03-0090-03

Experimental study of influential factors on bursting failure of foundation pit in soft soil area

Xiao Hongju, Sun Yuyong

(College of Civil Engineering, Tongling University, Tongling 244000, China)

Abstract: According to results of centrifugal model tests and indoors model tests, influential factors on anti-bursting stability of foundation pit were systematically investigated, including aquiclude properties, pile types and layouts, plane size of foundation fit etc. Results show that the mainly failure modes of the fourth and the sixth aquiclude, in Shanghai are overall heaving and surface boiling respectively. Water and sand inrush happen on contact surface between soil and underground structures when piles exist in foundation pit. Piles contribute to anti-bursting stability when cast-in-place piles and prefabricated pile have well contact strength. Foundation size has a significant effect on the anti-bursting stability.

Keywords: foundation pit in soft soil area; bursting; aquiclude property; plane size of foundation pit

*安徽省自然科学基金（1208085QE96），安徽省级优秀青年人才基金项目(2012SQRL192ZD)。

作者简介：肖红菊，硕士，Email：xiaohongju@126.com。

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