组合式桥梁护栏增设声屏障设计分析

Design and analysis of adding noise barrier to combined bridge guardrail

随着我国交通运输行业的高速发展,在越来越密的路网上行驶着越来越多的汽车,制造了越来越高分贝的噪声,通常新建高速公路会根据中远期规划配套进行声屏障、隔音墙等环保设计,但已通车的高速公路,或是因为年代久远未进行环保设计,亦或是随着城镇化的进程,之前的环保设计已不能满足目前的噪声防护要求。结合山西省汾离高速离石段新增声屏障设计项目,简要分析在已建成的Cm-PL 2(PL 3)-R型组合式桥梁护栏上加装声屏障的可行性,并对声屏障的力学性能,降噪效果进行论述。

With the rapid development of China's transportation industry,more and more cars are driving on the more and more dense road networK,maKing more and more high decibel noise.Generally,new expressways will carry out environmental protection design such as noise barrier and noise insulation wall according to the medium and long-term planning,but the expressways that have passed through,either because they haven't carried out environmental protection design for a long time,or with urbanization The previous environmental protection design can not meet the current noise protection requirements.In combination with the new sound barrier design project of Lishi section of Fenli Expressway in Shanxi Province,this paper briefly analyzes the feasibility of installing the noise barrier on the built Cm-PL 2(PL 3)-R type combined bridge guardrail,and discusses the mechanical properties and noise reduction effect of the noise barrier.