水泥土抗压强度试验及数值模拟

水泥土抗压强度试验及试块应力分布的模拟分析

晏志春 孙世国

（北方工业大学建筑工程学院 北京 100144）

摘 要：本文通过室内试验方法研究了不同水泥掺入比、龄期和水灰比对水泥土的抗压强度的影

响特点，并采用数值方法分析水泥土试块的应力分布特征。研究结果表明，水泥土强度并不一直随着水泥掺入比增大而增加，当掺入比大于50%时会逐渐达到峰值；龄期越长强度越高，水灰比越大强度越低。数值模拟结果与试验结果基本相符，证明其研究方法可行，试验结果可用于地铁施工过程中周围软土的注浆补强加固手段提供决策依据。

关键字：水泥土 抗压强度 数值模拟 应力 *

Soil-cement Compressive Strength and Simulation Analysis of

Test Block’s Stress Distribution

Yan Zhichun Sun Shiguo

(Col. of Architectural Engineering, North China Univ. of Tech. Beijing 100144)

Abstract：This paper studies the influencing characteristics of cement-soil compressive

strength through laboratory experiment when cement ratio, age and water-cement ratio are changed. And numerical simulation software is used to analyze the stress distribution characteristics of cement-soil test block. The results of the study show that, soil-cement strength is not always improved as cement mixing ratio increases, it will reach peak gradually when mixing ratio increases to more than 50%; soil-cement strength will be improved as the increasing of ages, and reduced when the water-cement ratio increases. Numerical simulation results are basically consistent with the experimental results. It shows that numerical simulation method is feasible and the model parameter can be used in the subway construction, it can provide

decision-making basis for reinforcement method of soft soil.

Keywords：cement-soil compressive strength Numerical simulation stress *北京市创新人才项目（PHR201006118）、北京教委学科与研究生教育-岩土工程项目（PXM2009-014212-076740）与北方工业大学重点项目联合资助

第一作者简介：晏志春，硕士研究生，主要研究方向：岩土工程