基于FLAC^3D的塑钢板桩路基防护优化设计与现场试验研究  

FLAC^3D-based Optimization Design and Field Measurements Analysis on Application of Plastic Steel Sheet Pile for Subgrade Protection

作　　者：叶霄 詹伟 余以强 于洋[3] YE Xiao;ZHAN Wei;YU Yi-qiang;YU Yang(Key Laboratory of Road and Bridge Detection and Maintenance Technology Research of Zhejiang Province,Zhejiang Scientific Research Institute of Transport,Hangzhou 311305,China;Zhejiang Scientific Research Institute of Transport,Hangzhou 310023,China;Ocean College,Zhejiang University,Hangzhou 316021,China)

机构地区：[1]浙江省交通运输科学研究院,浙江省道桥检测与养护技术研究重点实验室,杭州311305 [2]浙江省交通运输科学研究院,杭州310023 [3]浙江大学海洋学院,杭州316021

出　　处：《科学技术与工程》2021年第2期720-727,共8页Science Technology and Engineering

基　　金：国家自然科学基金(41807224);浙江省交通运输厅科研(2019018,2020051)。

摘　　要：低等级公路防护设施匮乏,路肩边坡水土流失严重。为了提高路基路面整体稳定性,延长道路使用寿命,通过对塑钢板桩材料本身的物理力学性能测定、基于FLAC3D对桩型优选和相应的参数优化分析以及依托工程现场试验,对塑钢板桩用于低等级公路路基防护工程中的可行性与适用性进行研究。结果表明:悬臂式塑钢板桩路基防护型式适用于防护高度1.2 m以下,防护高度与入土深度比宜取1∶1;拖板式和拉锚式塑钢板桩路基防护型式分别适用于防护高度1.8 m和2.4 m以下,防护高度与入土深度比均推荐取3∶2。塑钢板桩用于低等级公路中防护效果显著,防护成本低廉,在"四好农村路"建设中广阔的应用前景。Soil erosion of road shoulder has been extensively concerned due to the protection facilities of low-grade roads.In order to improve the overall stability of the subgrade and pavement and extend the service life of the road,the feasibility and applicability of the plastic steel sheet pile used in the low-grade road protection were studied through the measurement of the physical and mechanical properties of the plastic steel sheet pile,the optimization and applicability analysis of the pile type based on FLAC3 D and field tests of the project.Results show that plastic steel sheet pile can be used in the protection of low-grade road effectively,which enables realize the prefabricated production and on-site assembly of plastic steel sheet pile.The cantilever type plastic steel sheet pile is suitable for protection height below 1.2 m,and the ratio of protection height to embedded depth is recommended to be 1∶1;the side sheet type and the anchored plastic steel sheet pile are suitable for protection heights below 1.8 m and 2.4 m,respectively,the ratio of protection height to embedded depth is recommended to be 3∶2 in both cases.

关 键 词：塑钢板桩 路基防护 优化设计 镀锌钢管 “四好”农村公路 

分 类 号：TU472.6[建筑科学—结构工程] TU462[建筑科学—土工工程]