CAJ | 학술논문

充泥管袋筑堤的施工速度主要受制于管袋充填后的排水固结效率，后者与所充填土料的级配有关，土颗粒粒径越小排水固结效率越低。我国东南沿海地区广泛分布的小粒径充进管袋后淤堵严重，传统的管袋充填施工工艺已经不再适用。通过室内试验对比，发现细颗粒含量较高的土料充填后会在管袋表层形成软弱泥层，难以固结；而在管袋表层开设排泥口后可以有效排除管袋表层的细颗粒泥浆，提高了排水的效率。通过吊袋沉淀试验发现，不同级配的土料沉淀后粒径较大的土颗粒大部分于吊袋底部，粒径较小的细颗位于吊袋表层；管袋表层开设排水口不会造成粗颗粒土料的损失。
충니관대축제적시공속도주요수제우관대충전후적배수고결효솔，후자여소충전토료적급배유관，토과립립경월소배수고결효솔월저。아국동남연해지구엄범분포적소립경충진관대후어도엄중，전통적관대충전시공공예이경불재괄용。통과실내시험대비，발현세과립함량교고적토료충전후회재관대표층형성연약니층，난이고결；이재관대표층개설배니구후가이유효배제관대표층적세과립니장，제고료배수적효솔。통과조대침정시험발현，불동급배적토료침정후립경교대적토과립대부분우조대저부，립경교소적세과위우조대표층；관대표층개설배수구불회조성조과립토료적손실。
The construction speed of embankment with mud-filled tubes is constrained by the consolidation drainage efficiency af-ter the filling of tubes,which is related to the gradation of the filling soil material.Smaller soil particle size results in smaller consolidation drainage efficiency.In the southeastern coastal area of China,there are a lot of soil material with small grain size, which can cause serious clogging when they are filled into the tubes,and therefore the traditional construction scheme of tube filling is no longer applicable.The comparative study of laboratory tests showed that filling the tubes with the soil material of high content of fine-grained particles can form a soft clay layer at the surface of tubes and cause difficulty for consolidation. However,opening of mud drainage mouth at the surface of tubes can remove the mud with fine-grained particles and then in-crease the drainage efficiency.The punching bag precipitation tests also suggested that most of the soil material with coarser-grained particles appear in the bottom of the bags while the soil material with finer-grained particles occur at the surface of the bags.The existence of drainage pipe opening at the surface of the bags will not cause loss of coarser-grained soil material.