水泥搅拌桩加固堤防数值模拟分析

碟形湖是鄱阳湖重要的生态组成部分，对鄱阳湖水资源、水环境、水生态和水安全具有重要作用。撮箕湖是鄱阳湖最大的碟形湖之一，是重要的鲤鱼鲫鱼产卵场及候鸟栖息地，近年来，其藻类生长对鄱阳湖藻类的聚集起到较大贡献，对鄱阳湖的水生态环境造成一定影响。本研究通过现场调查、资料查询等方式摸清了近年来影响撮箕湖生态环境的主要污染物及其来源。研究表明：撮箕湖周边污染物主要来自于畜禽养殖，占总污染物的38.6%；撮箕湖周边污染物呈下降趋势，其中下降幅度最大的为TN，下降幅度达64.7%。从污染物来源看，畜禽养殖排放污染物下降幅度最大，COD、TN、TP下降幅度分别达到69.0%，69.3%，68.4%。从污染物排放量来看，人类活动对撮箕湖水环境影响整体下降，但仍然需要进一步加强管控。本研究可为相关部门开展鄱阳湖水生态环境保护提供借鉴和支撑。

Numerical simulation analysis of cement mixing pile strengthening embankment

The dish-shaped lakes are an important ecological component of Poyang Lake,and play an important role in the water resource,water environment,water ecology and water security of Poyang Lake.As one of the largest dishshaped lakes in Poyang Lake,Cuoji lake is an important spawning ground for carp and crucian carp as well as a habitat for migratory birds.In recent years,the growth of algae in the lake has contributed greatly to the aggregation of algae in Poyang Lake,and has a certain impact on the aquatic ecological environment of Poyang Lake.Through field investigation and data inquiry,the main factors and sources of pollutants that affect the ecological environment of Cuoji lake in recent years were found out.The results show that the pollutants around the Cuoji lake mainly come from the livestock and poultry breeding,accounting for 38.6% of the total pollutants.In recent years,the pollutants around the Cuoji lake show a downward trend,especially for TN,with a decrease of 64.7%.From the perspective of pollutant source,there is the most noticeable drop in the pollutant from livestock and poultry breeding,whose COD,TN and TP reached 69.0%,69.3% and 68.4% respectively.From the perspective of pollutant discharge,the impact of human activities on the water environment of the Cuoji lake has decreased.This study will provide opinions and suggestions for relevant departments to carry out the water ecological environment protection of the dish-shaped lake in Poyang Lake,and further provide support for the protection of the water ecological environment of Poyang Lake.