Page 179 - 《水资源与水工程学报》2023年第4期
P. 179

!34 " ! 4 #                       & ' ( ) & * + , -                               Vol.34No.4
               2023 $ 8%                JournalofWaterResources&WaterEngineering                 Aug.,2023

            DOI:10.11705/j.issn.1672-643X.2023.04.21


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                             Designofpassiveprotectionnetforfockfalldisasters
                                          usingdiscreteelementmethod

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              ZHANGFeiyun,FENGDemin,XUYang,LANYue,LIJinlin,ZHAOTianhao,MAChunhui
                  (1.PowerChinaChengduEngineeringCorporationLimited,Chengdu611130,China;2.TheFifthEngineeringBranch,
                    ChinaRailway11thBureauGroupCorporationLimited.,Chongqing400000,China;3.StateKeyLaborataryof
                      EeohydraulicsinNorthwestAridRegionofChina,Xi’anUniversityofTechnology,Xi’an710048,China)
               Abstract:Theinstallationofpassiveprotectionnetsisaneffectivemeasureforpreventingandcontrolling
               rockfalldisastersonslopes.Designingpassiveprotectionnetsthatareeffective ,accurate,andeconomicalis
               ofgreatsignificanceforenhancingthecomprehensivedisasterpreventionandmitigationcapabilitiesofthe
               societyasawhole.Toaddressfrequentrockfalldisasters ,adiscreteelementbaseddesignmethodofpassive
               protectionnetsforsloperockfalldisastersisdeveloped.Byestablishingthedetaileddiscreteelementmodels
               oftheslope,rockfall,andpassiveprotectionnet,indicatorssuchasrockmovementtrajectory,numberof
               interceptedrocks,andinterceptionefficiencyareanalyzedtodeterminetheparametersofthepassiveprotec
               tionnet ,suchasheightandlength.Thenthetypesuggestionofthepassiveprotectionnetisputforward
               basedonthemonitoringofthespeedandimpactenergychangesoftherockfall.Accordingtotheanalysisof
               thedeformationvariationoftheprotectionnetonvariouspositionsoftheimpactcrosssection ,themaximum
               deformationpositionofthepassiveprotectionnetunderthebestprotectiveconditionisdetermined.Taking
               theconstructionofareservoirroadatalargehydropowerstationasanexample ,thediscreteelementbased
               designmethodforpassiveprotectionnetsisusedtoquantitativelyanalyzerockfalldisasters ,anditisdeter
               minedthattheoptimallengthofthepassiveprotectionnetis30mandtheheightis5m ,withwhichthe

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