土工格栅加筋土挡墙设计中几个问题的讨论  

Disscusion of the Geogrid Reinforced Soil Retaining Wall’s Designing

作　　者：乔丽平 杨超 QIAO Liping;YANG Chao(Shenzhen Longgang Geological Exploration Bureau Shenzhen 518172,China;Shenzhen Comprehensive Geotechnical Engineering Investigation&Design Co.,Ltd.Shenzhen 518172,China;School of Civil Engineering and Architecture,Wuyi University Jiangmen 529020,China)

机构地区：[1]深圳市龙岗地质勘查局,深圳518172 [2]深圳市岩土综合勘察设计有限公司,深圳518172 [3]五邑大学土木建筑学院,广东江门529020

出　　处：《广东土木与建筑》2023年第5期12-14,共3页Guangdong Architecture Civil Engineering

基　　金：国家自然科学基金青年科学基金项目(41702323);广东省普通高校特色创新项目(自然科学类)(2020KTSCX152)。

摘　　要：以我国《水利水电工程土工合成材料应用技术规范:SL/T225—98》[1]为背景,结合近些年公开发表文献的相关研究成果,针对土工格栅加筋土挡墙设计中大家较为关注的刚性筋式挡墙和柔性筋式挡墙的划分、土压力的计算及滑动面的确定几个问题进行了详细讨论和分析,得到如下结论:①目前较为常用的聚合物类的普通土工格栅应归为柔性筋式挡墙,近几年来新出现的钢塑土工格栅挡墙应归为刚性筋式挡墙;②对于土工格栅加筋土挡墙,在进行筋材水平拉力计算时,其墙背侧向土压力较接近于朗肯主动土压力,设计计算按主动土压力计算是合适的;③土工格栅加筋土挡墙的潜在破裂面应采用朗肯直线型破裂面计算。所得结论可供类似工程设计中参考。Based on the background of“Standard for the Application of Geosynthetics in Hydraulic and Hydro-power Engineering”in China,combined with the relevant research results published in recent years,this paper discusses and analyzes in detail the division of rigid and flexible reinforcement retaining walls,the calculation of earth pressure and the determination of sliding surface,which were more concerned by people in the design of geogrid reinforced earth retaining walls.The conclusions were as followed:①The common polymer geogrid should be classified as flexible reinforcement retaining wall,and the steel plastic geogrid retaining wall emerging in recent years should be classified as rigid reinforcement retaining wall.②For the geogrid reinforced earth retaining wall,when calculating the horizontal tensile force of the reinforcement,the lateral earth pressure at the back of the wall was closer to the Rankine active earth pressure,so it was appropriate to calculate the active earth pressure for the design calculation.③The potential fracture surface of geogrid reinforced earth retaining wall should be calculated with Rankine linear fracture surface.The conclusions could be used for reference in the design of similar projects.

关 键 词：土工格栅 加筋土挡墙 设计 讨论 

分 类 号：TU443[建筑科学—岩土工程]