2023年第3期工程勘察GeotechnicalInvestigation&Surveying17红层软岩水平抗力系数确定方法探讨刘海军,王新,刘蕴琨(中国建筑西南勘察设计研究院有限公司,成都610059)摘要:本文分析了现行标准水平抗力系数现场测试方法的异同,考虑室内外试验岩体完整性和尺寸效应,建立采用岩石弹性模量等参数快速确定水平抗力系数的方法,同时依托重庆江北国际机场项目对推导公式进行了验证,并结合8个典型项目进一步印证判断新方法的适用性。研究结果表明:江北机场红层软岩水平抗力系数现场测试值为242.5MPa/m;采用岩石弹性模量等参数确定的水平抗力系数与现场实测值基本一致,为经验值的2.2倍;该计算方法在其它8个工程实例中同样适用。本文建立的计算方法可靠、合理,对工程设计具有参考价值。关键词:软岩;水平抗力系数;弹性模量;修正系数;计算方法中图分类号:TU45文献标识码:AStudyondeterminationmethodofhorizontalresistancecoefficientofredbedsoftrockLiuHaijun,WangXin,LiuYunkun(ChinaSouthwestGeotechnicalInvestigation&DesignInstituteCorporation,Chengdu610059,China)Abstract:Thesimilaritiesanddifferencesofthefieldtestmethodstodeterminethelateralresistancecoefficientincurrentstandardswasanalyzed.Consideringtherockmassintegrityandsizeeffectonlaboratoryandfieldtestresults,thehorizontalresistancecoefficientisquicklydeterminedbytheparameterssuchaselasticmodulusofrock.Atthesametime,basedonChongqingJiangbeiInternationalAirportproject,thederivedformulaisverified,andtheapplicabilityofthenewmethodisfurtherverifiedineighttypicalprojects.TheresultsshowthatthehorizontalresistancecoefficientofredbedsoftrockinJiangbeiAirportis242.5MPa/m.Thehorizontalresistancecoefficientdeterminedbyrockelasticmodulusandotherparametersisbasicallyconsistentwiththefieldmeasuredvalue,whichis2.2timesoftheempiricalvalue.Thecalculationmethodisalsoapplicabletotheother8projects.Thecalculationmethodestablishedinthispaperisreliableandreasonable,andcouldbereferredbythesimilardesign.Keywords:softrock;horizontalresistancecoefficient;elasticmodulus;correctioncoefficient;computationalmethod收稿日期:2022-05-09;修订日期:2022-07-19作者简介:刘海军(1986-),男(汉族),四川巴中人,硕士,高级工程师.0引言水平抗...
