摘 要：介绍了预应力混凝土方桩弹卡式连接件构造和接桩技术，对不同直径的弹卡连接件及锚固筋机械连接件进行了抗拉试验，其强度均满足相关标准要求。对弹卡式连接预应力混凝土方桩进行了接头抗弯、抗剪、抗拉试验，均加载至承载力检验值的110%，且未出现接头破坏的情况，性能指标均满足承载力要求。结合实际工程，对弹卡式连接方桩的桩身完整性和承载力进行了分析，其结果也均满足相关标准要求。Abstract:Thestructureandtechnologyofprestressedconcretesquarepileelasticcardconnectionareintroduced.Thetensiletestofelasticcardconnectionwithdifferentdiametersandmechanicalconnectionwithanchorbariscarriedout,andthestrengthmeetstherequirementsofrelevantstandards.Thejointbending,shearandtensiletestsoftheprestressedconcretesquarepilewithresilientclampingconnectionarecarriedout,allofwhichareloadedto110%ofthebearingcapacitytestvalue,andthereisnojointfailure.Theperformanceindexesofthejointallmeetthebearingcapacityrequirements.Combinedwiththeactualproject,theintegrityandbearingcapacityofthepilebodyareanalyzed,andtheresultsalsomeettherequirementsofrelevantstandards.

樊华,蒋元海,商立军,等.预应力混凝土方桩弹卡连接方式及应用研究[J].混凝土与水泥制品,2020(4):33-36. FAN H,JIANG Y H,SHANG L J,et al.Research and Application on the Resilient Clamping Connection of Prestressed Concrete Square Piles[J].China Concrete and Cement Products,2020(4):33-36.

摘 要：依托实际工程项目，介绍了公路预制装配式混凝土箱涵结构特点，并阐述了其拼装工艺流程、接缝防水处理、底板洞口浇筑等关键工序操作要点。最后，与传统现浇混凝土箱涵在质量、进度、效益方面进行了对比，可为装配式混凝土箱涵的推广应用提供参考。Abstract:Basedonthepracticalproject,thestructuralcharacteristicsofprefabricatedconcreteboxculvertareintroduced,andthekeyoperationpointsofitsassemblyprocess,jointwaterprooftreatment,bottomslabopeningpouringareexpounded.Finally,comparedwiththetraditionalcast-in-placeboxculvertintermsofquality,progressandbenefit,itcanprovideareferenceforthepopularizationandapplicationofprefabricatedconcreteboxculvert.

张丹,张乃源,李永明,等.公路预制装配式混凝土箱涵施工技术[J].混凝土与水泥制品,2020(4):37-40,85. ZHANG D,ZHANG N Y,LI Y M,et al.Construction Technology of Highway Fabricated Concrete Box Culverts[J].China Concrete and Cement Products,2020(4):37-40,85.

摘 要：为研究一种新型预制型钢肋底板混凝土叠合板的受力性能，以跨度、肋高、肋宽、型钢厚度作为主要变量，对4块带型钢肋预制混凝土底板和2块叠合板进行了静载试验，得到了底板和叠合板的破坏形态、荷载-挠度曲线、型钢荷载-应变曲线，分析了其破坏机理、变形特性以及裂缝发展规律。结果表明，型钢肋与混凝土整体受力较好；增大试件肋宽、肋高均使得试件刚度和抗裂性能提高，增大试件跨度会降低其极限承载力、刚度和恢复性能；采用自然粗糙面的叠合面抗剪性能良好，可达到与整浇板相同的受力性能。Abstract:Inordertostudythemechanicalbehaviorofanewtypeofprefabricatedsteelribbedconcretecompositeslabs,thestaticloadtestsoffourprefabricatedconcretepanelswithsteelribbedandtwolaminatedslabswerecarriedoutwithspan,ribheight,ribwidthandsectionsteelthicknessasmainvariables.Thefailuremode,load-deflectioncurveandsteelload-straincurveoftheslabswereobtained,andthefailuremechanism,deformationcharacteristicsandcrackdevelopmentlawwereanalyzed.Theresultsshowthattheoverallforceofsteelandconcreteribsisbetter.Increasingtheribwidthandribheightofthespecimenscanincreasethestiffnessandcrackresistanceofthespecimen.Increasingthespanofthespecimencanreduceitsultimatebearingcapacity,stiffnessandrecoveryperformance.Thelaminatedsurfacewithnaturalroughsurfacehasgoodshearresistanceandcanachievethesamemechanicalbehaviorastheintegralplate.

房强,陶忠,钱帆,等.带型钢肋预制混凝土底板和叠合板的试验研究[J].混凝土与水泥制品,2020(4):41-45. FANG Q,TAO Z,QIAN F,et al.Experimental Research on Precast Concrete Panel with Section Steel Rib and Its Composite Slab[J].China Concrete and Cement Products,2020(4):41-45.