CAJ | 학술논문

疏浚土及吹填泥能否作为充填料是土工织物充填袋筑堤技术关键问题。针对连云港疏浚土，开展泥水混合物沉积模拟试验，研究了黏粒含量和初始含水率对泥水混合物自重沉积特性的影响，以及作为充填材料的适用性。试验结果表明：充填土沉积过程可分为沉淀阶段和自重固结阶段。沉淀阶段时间较短，土性指标很快趋于稳定。自重固结阶段土性指标几乎没有变化，表明充填土自重固结是相当缓慢的；充填土初始含水率越大，或黏粒含量越小，最大沉淀速率越大，沉淀越快。初始含水率越大，或黏粒含量越大，沉淀结束时充填土含水率和孔隙比越大，密度越小；当充填土黏粒含量大于10％时，在确保充填土的流动性和可灌性前提下，应尽量减小初始含水率，从而降低充填土沉淀结束时的含水率和孔隙比，提高密度；当充填土料的黏粒含量大于30％时，最大沉淀速率很小，沉淀的持续时间将会比较长，不利于工程施工。因此，充填土料的黏粒含量应小于30％。
소준토급취전니능부작위충전료시토공직물충전대축제기술관건문제。침대련운항소준토，개전니수혼합물침적모의시험，연구료점립함량화초시함수솔대니수혼합물자중침적특성적영향，이급작위충전재료적괄용성。시험결과표명：충전토침적과정가분위침정계단화자중고결계단。침정계단시간교단，토성지표흔쾌추우은정。자중고결계단토성지표궤호몰유변화，표명충전토자중고결시상당완만적；충전토초시함수솔월대，혹점립함량월소，최대침정속솔월대，침정월쾌。초시함수솔월대，혹점립함량월대，침정결속시충전토함수솔화공극비월대，밀도월소；당충전토점립함량대우10％시，재학보충전토적류동성화가관성전제하，응진량감소초시함수솔，종이강저충전토침정결속시적함수솔화공극비，제고밀도；당충전토료적점립함량대우30％시，최대침정속솔흔소，침정적지속시간장회비교장，불리우공정시공。인차，충전토료적점립함량응소우30％。
Whether the dredged fill can be used as filling material of the geotextile bags is a key technical problem in the construction of dams and embankments .Laboratory tests were carried out to study the influence of clay content and initial water content on the self-weight sedimentation behavior and the applicability as filling material of dredged fills in Lianyun -gang Harbor .Results indicate that the sedimentation process can be divided into sedimentation stage and self-weight con-solidation stage .The former stage is very short ,and the soil indexes stabilize quickly .The latter stage takes very long time ,and the soil indexes rarely change .The maximum sedimentation rate is larger and sedimentation time is shorter with larger initial water content or smaller clay content .The larger the initial water content or the clay content is ,the larger the final water content and void ratio of dredged fill is ,and the smaller the final density is after sedimentation .If clay content is larger than 10% ,the initial water content should be as small as possible with liquidity of filling ,so as to get smaller final water content ,void ratio and larger final density .If clay content is larger than 30% ,the maximum sedi-mentation rate is very small and the duration of sedimentation is relatively long ,which is disadvantageous to the engineer-ing construction .Therefore ,the clay content of dredged fill should be less than 30% .