土工织物充填泥袋筑堤现场试验研究

In-situ experimental study on the embankment with mud-filled geotextile bags

与传统抛石、充填砂袋等材料相比,海堤修筑中采用疏浚土、吹填泥充填袋这类新型填筑材料存在含水率高、强度低、渗透性差、排水不畅、压缩率大等技术问题。在砂石料匮乏的淤泥质海岸连云港徐圩港区,以疏浚土为充填料,开展试验段总长60m、宽30m的土工织物充填泥袋筑堤现场试验研究。分析比较各方案施工期整体沉降、水平位移、压缩率及孔隙水压力变化,表明堤身形成过程可分为排水压缩和自重固结两阶段,论证了土工织物充填泥袋替代砂石筑堤的可行性。

Compared with the riprap stone and the filling sandbags in embankment construction, the dredging soil or the reclaimed mud for the sea walls will meet the problems such as the higher moisture content, the extremely lower strength, the worse permeability, the poorer drainage and the larger compression rate. In Xuwei Port of Lianyungang, where is the silty coast and lacks of the ballast, the field test study is carried out for the dredging soil as the filling material in the testing section with 60m long and 30m wide. The total settlement, the horizontal displacement, the compression rate and the pore water pressure change in the construction period are analyzed. The results show that the dike body forming process can be divided into two stages the drained compression stage and self-weight consolidation stage. The feasibility of using the geotextile mud bags instead of the ballast in the embankment construction is demonstrated.