资源描述：
《论述减少地基埋深基础上砂垫层施工的运用》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、http://www.sdminlejx.cnhttp://www.tastdmp.comhttp://www.taflmy.comhttp://www.tastjx.com论述减少地基埋深基础上砂垫层施工的运用换土垫层法是将基础下一定深度内的土层挖去，然后回填以强度较高的砂、碎石或灰土等并夯至密实。适用于荷载不大的建筑物地基处理。砂和砂石地基（垫层）采用砂或砂砾石（碎石）混合物，经分层夯实，作为地基的持力层，提高基础下部地基强度，并通过垫层的压力扩散作用，降低地基的压实力，减少变形量，同时垫层可起排水作用，地基土中孔隙水可通过垫层快速地排出，能加速下部土层的沉降和固结。Cushionmet
2、hodinsoilisdugbasedwithinacertaindepthofsoillayer,andthenbackfillsandwithhighstrength,suchasgravelordirtandramtothecompact.Suitableforsmallloadofbuildingfoundationtreatment.(pad)sandandgravelfoundationwithsandorgravelstones(gravel)mixture,thehierarchicalcompaction,asthefoundationofthebearinglayer,i
3、mprovethelowerstrengthoffoundation,andthroughthecushionpressurediffusioneffect,reducethepressureoffoundationstrength,reducethedeformation,thecushionhttp://www.sdminlejx.cnhttp://www.tastdmp.comhttp://www.taflmy.comhttp://www.tastjx.comcanbedrainageroleatthesametime,throughporewaterinthefoundationso
4、ilcushiondischargequicklyandcanacceleratesubsidenceandconsolidationofthelowersoillayer. 1砂垫层的施工要点1sandcushionconstructionpoints 1.1砂垫层采用中粗砂，经过化验含泥量必须在5%以内，操作前要验槽，将基底表面浮土、淤泥、杂物清除干净，两侧应设一定坡度，防止振捣时塌方。1.1sandmatlayerusedincoarsesand,siltcontentmustbelessthan5%aftertest,tocheckslotbeforeoperation,theb
5、asalsurfaceofeluvialsoil,silt,andclearoutclutter,onbothsidesshouldsetacertaingradient,topreventvibrationwhenlandslides. 1.2http://www.sdminlejx.cnhttp://www.tastdmp.comhttp://www.taflmy.comhttp://www.tastjx.com应按级配合砂料，人工级配的砂、碎石应先将砂、碎石拌合均匀后再铺开压实，铺设的级配砂石在碾压前应根据其干湿程度和气候情况，适当洒水使其达到最佳含水量，以利碾压密实。1.2leve
6、lshallcooperatewithsand,artificialsand,gravelshouldbegradedwillsand,gravelmixingevenlyspreadoutagainaftercompaction,gradingsandinfrontoftherollercompactionshallbelaidaccordingtothedegreeandthedryandwetclimatesituation,appropriatesprinklingwatertotheoptimalwatercontent,compaction. 1.3砂垫层要分层铺设、分层夯实，
7、控制每层砂垫层的铺设厚度。每铺好一层垫层经密实度检验合格后方可进行上一层施工。Www.11665.CoM每层砂石在碾压前，应按每100m2设一纯砂检查点，机械碾压后，在纯砂点取样，测定砂的干密度，经检查合格后方可进行上层砂石垫层施工。1.3laying,hierarchicalcompactionsandmatlayertolayer,controllayingthicknessofeachlayerofsa
