松干堤防加高培厚工程土工格栅加筋稳定性研究  

A Stability Analysis of Geogrid Reinforced Enlarged Embankment of Songhua River Mainstream

作　　者：杨永森 郭丰华 原晓军 王远明 邱流潮[1] YANG Yong-sen;GUO Feng-hua;YUAN Xiao-jun;WANG Yuan-ming;QIU Liu-chao(College of Water Resources ＆ Civil Engineering,China Agricultural University,Beijing 100083,China;Heilongjiang Bureau of SanJiang Engineering Management and Construction,Heilongjiang Province,Harbin 150081,China)

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]黑龙江省三江工程建设管理局,哈尔滨150081

出　　处：《中国农村水利水电》2018年第7期103-108,共6页China Rural Water and Hydropower

基　　金：黑龙江省松花江干流治理工程科学研究实验项目(SGZL/KY-12);国家自然科学基金项目(11772351)

摘　　要：为了深入研究土工格栅在加高培厚堤防工程中的加固作用,以松花江干流第九标段典型堤防断面为例,运用有限元法对加高培厚堤防进行了分析,研究了不同的开挖和加筋形式对堤防稳定性和沉降的影响。研究结果表明:基于提出的加高培厚堤防的优化方案,经过加筋处理后,堤防坡比优化为1∶1.37,安全系数从1.08提升至1.63,土地使用面积减小了36.9%,单位长度加高培厚工程所需土方量减少约20 m3;开挖台阶和加筋都可减小沉降,加筋相比开挖台阶作用更明显,共同使用效果最好;加筋位置越靠近堤防底部,降低堤防差异沉降的效果越明显,加筋层数多比加筋层数少的效果好,在实际工程中,并不是越多越好,应综合考虑经济及工程效益,合理选择加筋处治方案。In order to investigate the reinforcement effect of geogrids in the enlarged embankment projects deeply,taking the typical embankment section of the ninth section of the Songhuajiang River mainstreamas an example,the finite element method is used to analyze the effects of different excavation and reinforced forms on the stability and settlement of the heightening and thickening embankments. The results show that the optimized slope section ratio is 1 ∶ 1.37,the safety factor increases from 1.08 to 1.63 and the land use area decreases by 36.9%,the required amount of earthwork decreases by about 20 m3. Both bench excavation and reinforcement can reduce the settlement,the effect of reinforcement is more obvious than the bench excavation,and the combined action is the best. The closer the reinforcement locate to the bottom of the embankment,the lower is the differential settlement of the embankment,the more reinforcement layers are,the more obvious the effect is,but considering the economic benefits,the more is not better in projects. Economic and engineering benefits should be taken into consideration,and a rational choice of reinforcement treatment scheme should be chosen.

关 键 词：加高培厚 土工格栅 加筋 沉降 稳定性分析 

分 类 号：TV871[水利工程—水利水电工程]