黃土地基加固而言,一般常用的處理方法首要是換填和拋石擠淤,該種處理方法工程量大、工期較長、 費用相對較高。近幾年來,采用土工組成材料處理脆弱地基,已取得了較好效果。而用蜂巢格室加固飽滿黃土地基,則是一種新的加固方法。
蜂巢格室由高密度聚乙烯或聚丙烯共聚物片材經超聲波焊接而成,具有三維網格結構,全體強度高、耐老化、抗kang腐fu蝕shi性xing能neng好hao。用yong土tu工gong格ge室shi對dui飽bao滿man黃huang土tu地di基ji進jin行xing局ju部bu換huan填tian加jia固gu,形xing成cheng水shui平ping向xiang加jia筋jin複fu合he結jie構gou體ti,能neng抵di抗kang地di基ji承cheng載zai力li,達da到dao加jia固gu黃huang土tu地di基ji之zhi目mu的de。
蜂(feng)巢(chao)格(ge)室(shi)在(zai)黃(huang)土(tu)地(di)基(ji)加(jia)固(gu)受(shou)力(li)變(bian)形(xing)過(guo)程(cheng)中(zhong),首(shou)先(xian)是(shi)土(tu)與(yu)填(tian)料(liao)的(de)衝(chong)突(tu)與(yu)粘(zhan)著(zhe)供(gong)給(gei)了(le)較(jiao)大(da)的(de)衝(chong)突(tu)係(xi)數(shu)與(yu)粘(zhan)聚(ju)力(li),產(chan)生(sheng)了(le)較(jiao)大(da)的(de)衝(chong)突(tu)力(li)和(he)抗(kang)拔(ba)力(li);其次是土工格室與充填於其中的填料一起工作, 相(xiang)互(hu)效(xiao)果(guo),土(tu)工(gong)格(ge)室(shi)對(dui)填(tian)料(liao)供(gong)給(gei)了(le)較(jiao)大(da)的(de)側(ce)向(xiang)約(yue)束(shu)力(li),格(ge)室(shi)側(ce)壁(bi)對(dui)其(qi)中(zhong)的(de)填(tian)料(liao)產(chan)生(sheng)了(le)向(xiang)上(shang)的(de)衝(chong)突(tu)支(zhi)承(cheng)力(li),然(ran)後(hou)形(xing)成(cheng)了(le)一(yi)個(ge)具(ju)有(you)較(jiao)大(da)剛(gang)度(du)和(he)強(qiang)度(du)的(de)加(jia)筋(jin)複(fu)合(he)結(jie)構(gou)層(ceng),起(qi)到(dao)了(le)類(lei)似(si)於(yu)筏(fa)板(ban)基(ji)礎(chu)的(de)效(xiao)果(guo),有(you)效(xiao)地(di)擴(kuo)散(san)了(le)應(ying)力(li),使(shi)荷(he)載(zai)的(de)分(fen)布(bu)更(geng)為(wei)均(jun)勻(yun)。
在土工格室加筋黃土地基加固複合結構層中,若填料的壓實度較低,將導致該結構層抗剪強度下降,然後製約了格室側向約束力、格ge室shi側ce壁bi與yu填tian料liao衝chong突tu力li和he地di基ji土tu與yu填tian料liao衝chong突tu力li及ji粘zhan著zhe力li發fa揮hui,利li於yu加jia筋jin複fu合he結jie構gou層ceng中zhong滑hua動dong麵mian的de形xing成cheng和he發fa展zhan,土tu工gong格ge室shi筏fa板ban基ji礎chu的de效xiao果guo將jiang會hui減jian小xiao,然ran後hou下xia降jiang其qi地di基ji承cheng載zai力li。
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