土工膜可否维持工程所担忧的寿命难题
现阶段(duan)绝大多(duo)数土工(gong)(gong)膜(mo)(mo)的(de)(de)原材料(liao)寿(shou)命为(wei)原厂预估寿(shou)命，关键缘故是土工(gong)(gong)合成(cheng)材料(liao)当(dang)今世(shi)界营(ying)销推广(guang)应(ying)用只(zhi)(zhi)有50年，中(zhong)(zhong)国应(ying)用只(zhi)(zhi)有30年，欠缺工(gong)(gong)程应(ying)用评(ping)测根据(ju)，且中(zhong)(zhong)国对其在使用性(xing)能设计方案(an)层面的(de)(de)要求现阶段(duan)较为(wei)模糊不(bu)清。随(sui)之土工(gong)(gong)膜(mo)(mo)规模性(xing)的(de)(de)工(gong)(gong)程运用，土工(gong)(gong)膜(mo)(mo)可否在很多(duo)年乃至更长期(qi)内维(wei)持特性(xing)的(de)(de)平稳，其工(gong)(gong)程寿(shou)命是工(gong)(gong)程所担忧的(de)(de)。
土(tu)(tu)工(gong)(gong)(gong)(gong)膜可否维持工(gong)(gong)(gong)(gong)程(cheng)(cheng)所担忧的寿命难题 不(bu)一(yi)样(yang)原(yuan)材料、不(bu)一(yi)样(yang)土(tu)(tu)壤(rang)层、不(bu)一(yi)样(yang)应用自(zi)然(ran)环境(水、有机化学、微生物(wu)、溫度(du)、pH值)、不(bu)一(yi)样(yang)工(gong)(gong)(gong)(gong)程(cheng)(cheng)(路(lu)基工(gong)(gong)(gong)(gong)程(cheng)(cheng)、路(lu)基、护(hu)坡)，土(tu)(tu)工(gong)(gong)(gong)(gong)膜抗(kang)(kang)压强度(du)损(sun)失(shi)率(lv)不(bu)一(yi)样(yang)。如聚酯原(yuan)材料PES在弱酸性(xing)饱和状(zhuang)态土(tu)(tu)身体，当场抗(kang)(kang)压强度(du)减少关键是水解反应，抗(kang)(kang)压强度(du)损(sun)失(shi)率(lv)为0.25mm~0.6%/年(nian)，热粘无纺(fang)土(tu)(tu)工(gong)(gong)(gong)(gong)布抗(kang)(kang)压强度(du)损(sun)失(shi)率(lv)为2.45~5.06%/年(nian)，聚丙烯类及0.54~2.56%/年(nian)。
土(tu)工(gong)膜(mo)是这(zhei)种土(tu)工(gong)合成(cheng)材料，其抗(kang)压强度(du)高、延展性(xing)好、抗(kang)腐蚀、抗(kang)老(lao)化、耐高温、耐低温，已经(jing)运用(yong)于工(gong)程建筑、水利工(gong)程、铁路(lu)线、道路(lu)、海港、开采(cai)、军用(yong)等多个(ge)领域(yu)。两布一膜(mo)土(tu)工(gong)膜(mo)使(shi)用(yong)性(xing)能就是指其物理学(xue)和有机化学(xue)特性(xing)的(de)可靠性(xing)，脆(cui)化状(zhuang)况根本原(yuan)因高分子材料高聚物受紫(zi)外(wai)光辐射源、溫(wen)度(du)和环(huan)境湿(shi)度(du)转变、有机化学(xue)与微生(sheng)物腐蚀、冻融(rong)循环(huan)转变和机械设备损害等外(wai)部要素的(de)危害，链段构(gou)造产生(sheng)溶解反(fan)映或化学(xue)交联反(fan)映的(de)結果。
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