土工格栅复合反滤土工布用于处理一般软基
土(tu)工(gong)(gong)(gong)(gong)(gong)合(he)(he)成(cheng)(cheng)材(cai)料(liao)(liao)是一种(zhong)岩(yan)土(tu)工(gong)(gong)(gong)(gong)(gong)程材(cai)料(liao)(liao)。它以人(ren)工(gong)(gong)(gong)(gong)(gong)合(he)(he)成(cheng)(cheng)的(de)聚(ju)合(he)(he)物,如塑料(liao)(liao)、化纤、合(he)(he)成(cheng)(cheng)橡胶等(deng)为原料(liao)(liao),制成(cheng)(cheng)各种(zhong)类型的(de)产品,置于土(tu)体(ti)内部、表层(ceng)(ceng)或各层(ceng)(ceng)土(tu)体(ti)之(zhi)间,发(fa)挥加强、保护土(tu)体(ti)、提高承载能力的(de)作用(yong)。土(tu)工(gong)(gong)(gong)(gong)(gong)合(he)(he)成(cheng)(cheng)材(cai)料(liao)(liao)可分为土(tu)工(gong)(gong)(gong)(gong)(gong)织(zhi)物、土(tu)工(gong)(gong)(gong)(gong)(gong)膜(mo)、特种(zhong)土(tu)工(gong)(gong)(gong)(gong)(gong)合(he)(he)成(cheng)(cheng)材(cai)料(liao)(liao)和复合(he)(he)型土(tu)工(gong)(gong)(gong)(gong)(gong)合(he)(he)成(cheng)(cheng)材(cai)料(liao)(liao)等(deng)类型。
目前(qian)处(chu)理(li)软基的(de)土工(gong)(gong)材料(liao)(liao)(liao)(liao)(liao)(liao)主要有(you)有(you)纺(fang)土工(gong)(gong)布、格栅(zha)等。但单独运用(yong)这些(xie)材料(liao)(liao)(liao)(liao)(liao)(liao)用(yong)于(yu)(yu)软基处(chu)理(li)存(cun)在(zai)一些(xie)缺陷(xian)或不(bu)足(zu):单独采用(yong)加筋格栅(zha)处(chu)理(li)软基的(de)不(bu)足(zu):不(bu)能(neng)彻底分离(li)软土与(yu)(yu)粒(li)料(liao)(liao)(liao)(liao)(liao)(liao)层,格栅(zha)具有(you)的(de)网(wang)孔结(jie)构因为(wei)较(jiao)(jiao)大孔径,不(bu)能(neng)够阻止小于(yu)(yu)网(wang)眼尺寸的(de)粗粒(li)料(liao)(liao)(liao)(liao)(liao)(liao)与(yu)(yu)软土相互掺混。这会直接导致(zhi)(zhi)粗粒(li)料(liao)(liao)(liao)(liao)(liao)(liao)在(zai)软基中不(bu)能(neng)保持较(jiao)(jiao)为(wei)明确的(de)界面,甚至在(zai)导致(zhi)(zhi)粗粒(li)料(liao)(liao)(liao)(liao)(liao)(liao)在(zai)软基中掺杂消散单独采用(yong)有(you)纺(fang)土工(gong)(gong)布处(chu)理(li)软基的(de)不(bu)足(zu):有(you)纺(fang)土工(gong)(gong)布虽(sui)然强度较(jiao)(jiao)大,但其面外刚度很(hen)小,很(hen)容易褶皱;其网(wang)眼较(jiao)(jiao)小,孔径较(jiao)(jiao)小,可以分离(li)软土与(yu)(yu)粒(li)料(liao)(liao)(liao)(liao)(liao)(liao)层,但对(dui)于(yu)(yu)很(hen)细的(de)细料(liao)(liao)(liao)(liao)(liao)(liao)仍不(bu)能(neng)实现隔离(li)。
鉴于此,克(ke)服以上技术的(de)不足(zu),创新提(ti)出(chu)土(tu)工(gong)(gong)格栅复合无纺土(tu)工(gong)(gong)布用(yong)于软(ruan)基(ji)(ji)处(chu)理(li),土(tu)工(gong)(gong)格栅提(ti)供强度(du)和刚度(du),将软(ruan)基(ji)(ji)顶部(bu)一定厚(hou)度(du)内的(de)路(lu)基(ji)(ji)形(xing)成(cheng)整(zheng)体性较(jiao)强的(de)板体,最大程度(du)消除(chu)不均匀沉降;无纺反滤土(tu)工(gong)(gong)布提(ti)供反滤功能,在满足(zu)固结渗透(tou)排(pai)水的(de)同时(shi),分离软(ruan)土(tu)与(yu)粒料(liao)层,形(xing)成(cheng)粒料(liao)层和软(ruan)土(tu)之(zhi)间清晰完(wan)整(zheng)的(de)界(jie)面,消除(chu)因(yin)加(jia)筋格栅网眼过大,路(lu)基(ji)(ji)填料(liao)在振动压实过程中向软(ruan)基(ji)(ji)消散(san)的(de)弊端。
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