简述高速公路拓宽工程技术及要点摘要：本文从以下三个方面探讨高速公路拓宽工程施工技术与管理是高速公路拓宽工程概述，说明了高速公路拓宽工程的特点和要求：二是高速公路拓宽施工技术，分析了拓宽工程施工的具体环节与方法三是高速公路拓宽工程施工管理，针对拓宽工程施工过程中出现的问题采取有针对性的管理措施。随着国民经济的快速发展，道路交通运量迅猛增长，既有公路、城市道路等旧路加宽加铺改造工程也随着大量的付诸实施。对旧路进行加宽加铺改造时要特别注意：①新旧路基间的不均匀沉降以及新路基的塑性累积变形对路面结构响应的影响，②新旧路基间的刚度差异对路面结构响应的影响，为此，在旧路加宽改造工程的实施之前必须进行先期的方案试验研究。通常可采用软弱地基处理、基底清淤换填、旧路路堤台阶开挖、土工合成材料加筋垫层和加筋土路堤、土工织物防渗和排水、改良土高强路堤和轻质路堤、铺设土工合成材料防裂层或增大加铺层厚度等工程技术措施。关键词：高速公路拓宽工程：施工技术：加宽Abstract:This article from the following three aspects ofconstruction technology and management of freeway widening project is theproject of highway,introduces the characteristics and requirements ofthe freeway widening project;two is the construction technology ofexpressway widening,analyzes the link and method of widening engineeringconstruction is three engineering construction management of highwayengineering construction process,to broaden the problem of targetedmanagement.With the rapid development of the national economy,the rapidgrowth of road traffic volume,the existing roads,urban roads and otherold road widening and renovation project has also been implemented witha large number of.The old road widening pavement reconstruction shouldpay special attention to:uneven settlement and cumulative effect ofdeformation on the response of pavement subgrade and roadbed of the newplastic between the effects of the stiffness difference between the newand old embankment to the pavement structure response to this end,beforethe implementation of the old road widening reconstruction project mustbe carried out preliminary study on the test scheme.Usually can be usedfor soft ground treatment,basement,old road embankment dredging for fillstep excavation,geosynthetic reinforced and reinforced embankment,geotextile anti-seepage and drainage,soil embankment and high strengthlightweight embankment,laying geosynthetics layer or increasing thethickness of overlay technique.Key words:Highway Widening Project;construction technology;widening目录1.高速公路拓宽工程概述1.1新老路基结合部位病害原因分析1.2新老路基结合部处理的主要内容…2.路基加宽方案及方法22.1加宽前准备…2.2地基处理…22.2.1碎石垫层法22.2.2按设计图纸要求测量定出土工格栅的边桩.33拓宽公路与施工技术要求43.1管桩的起吊与储运.…43.3.1管桩的现场堆放应符合下列规定…43.3.2管桩吊运应符合下列规定.53.3.3取桩应符合下列规定............3.2静压法施工的技术要求.63.3质量检验内容及标准73.3.1施工前检查.…73.3.2施工中检查…3.4施工注意事项3.5河、塘基底处理3.6路基填筑(1)分层填筑…10(2)摊铺平整…1111(4)碾压夯实.…11(5)检验签证…11(6)路基整形…(7)边坡整修…11