土工织物加固软土地基工程中土体材料参数敏感性分析

Analysis on soil material parameter sensitivity in soft soil foundation reinforcement project by geotextile

利用有限元软件对土工织物加固的堤坝进行了数值计算,以加固后堤坝的安全系数为主要评价指标,系统地分析了堤坝土体材料参数对织物加固效果的敏感性。结果表明,软土地基中土体的竖向应力值随着加载的持续逐渐增大;堤坝土体的重度对安全系数的影响较大,在工程设计中应主要考虑,参数摩擦角次之,参数泊松比、弹性模量和黏聚力影响性最弱,在工程设计中可以次要考虑。

Finite element software is utilized for numerical calculation to dams reinforced by geotextile.Safety coefficient of dam after reinforcement is regarded as the main evaluation indicator for systematically analyzing the sensitivity of dam soil material parameter on geotextile reinforcement effect.Results show that vertical stress value of soil in the soft soil foundation is gradually increased with the continuous increase of load.Gravity of dam soil has greater influence on safety coefficient,which should be mainly considered in project design.It is followed by parameter friction angle and parameter poisson＇s ratio.Modulus of elasticity and cohesion have the weakest influence,which can be secondarily considered in engineering design.