旁压试验在广州某地铁勘察中的应用

Application of Pressure Meter Test to Subway Exploration in Guangzhou

旁压试验由于试验方法简单、灵活、方便、准确等特点,逐渐成为岩土工程勘察中主要的原位测试方法之一。为了得到准确的静止侧压力系数和水平基床系数,首先简要地介绍了旁压试验的结构及工作原理,系统地分析了由旁压曲线计算土的静止侧压力系数和水平基床系数的合理方法,并将其应用于广州某地铁工程勘察的原位测试中,然后通过对旁压试验的成果整理分析,得到了准确的静止侧压力系数和水平基床系数,为科学合理地分析广州地铁隧道衬砌受力特性和设计衬砌参数提供理论依据。

Because of its simplicity, flexibility, convenience and accuracy, pressure meter test has gradually become one of the main in-situ test methods in geotechnical engineering investigation. In order to obtain accurate static lateral pressure coefficient and horizontal foundation coefficient, this paper briefly introduces the structure and working principle of side pressure test, systematically analyses the reasonable method of calculating static lateral pressure coefficient and horizontal foundation coefficient of soil from side pressure curve, and applies it to in-situ test of a metro project in Guangzhou. Through collating and analyzing the results of side pressure test, the accurate static lateral pressure coefficient and horizontal bed coefficient are obtained, providing a theoretical basis for scientific and rational analysis of the mechanical characteristics of Guangzhou metro tunnel lining and design of lining parameters.