改扩建工程精细化勘察设计思考与实践

Considerations and Practice on Refined Investigation and Design of Reconstruction and Extension Project

为了提高公路服务水平和改善通行条件,高速公路改扩建工程成为了当前交通发展的主要需求。同时,为了满足国家对高速公路建设的高质量发展和绿色可持续发展的要求,提出对高速公路改扩建进行精细化勘察设计。以已实施的沈阳至海口国家高速公路水口至白沙段改扩建设计施工总承包项目为例,探讨了高速公路改扩建工程中精细化勘察设计方案。通过深入研究平纵面精准拟合、软土路段路基差异沉降控制、新老路堤拼接工艺、拼接桥梁结构设计等关键技术,并在施工阶段积极采用新技术、新工艺,有效地解决改扩建中的难点问题。

In order to improve the highway service level and transport conditions,the expansion and reconstruction of expressways have become the main demand for current transportation development.At the same time,in order to meet the requirements of high-quality development and green sustainable development of expressway construction in China,it is proposed to conduct detailed investigation and design for the expansion and reconstruction of expressways. Taking the design and construction of thereconstruction and expansion of Shuikou-Baisha Section of the Shenyang-Haikou Expressway project asan example, the detailed investigation and design scheme for the expansion and reconstruction ofexpressways are discussed in the paper. Through in-depth research on key technologies such as precisefitting of horizontal and vertical planes, differential settlement control of subgrade in soft soil sections,new and old embankment splicing technology, and splicing bridge structure design, and actively adoptingnew technologies and processes during the construction phase, the difficult problems encountered in theexpansion can be effectively solved.