泡沫轻质混凝土应用于高速公路扩建拼宽路基的关键施工技术及工程效益分析

Key Construction Techniques and Engineering Benefits Analysis of Foam Lightweight Concrete Applied to Highway Expansion and Widening Subgrade

摘要: 随着我国高速公路交通量增加，早期路段通行能力不足问题日益突出，改扩建工程成为重要解决方案。本文以长春至深圳国家高速公路河源至惠州段改扩建工程为例，重点介绍了泡沫轻质混凝土在路基拓宽中的应用及其关键技术。研究表明，泡沫轻质混凝土的应用具有减小填土荷载、降低沉降差异、施工便捷、占地少等优点，能有效缓解新旧路基沉降差异，提升工程质量和安全性。同时，其作为新型环保材料，具有良好的经济效益与社会效益，具备良好的推广价值。

Abstract: With the increase in highway traffic volume in China, the problem of insufficient capacity in early-stage sections has become increasingly prominent, making reconstruction and expansion projects an important solution. This paper takes the reconstruction and expansion project of the Heyuan-Huizhou section of the Changchun-Shenzhen National Expressway as an example to focus on the application and key technologies of foamed lightweight concrete in subgrade widening. Studies have shown that the application of foamed lightweight concrete offers advantages, including reduced embankment load, decreased differential settlement, convenient construction, and less land occupation. It can effectively mitigate differential settlement between new and old subgrades, thereby improving project quality and safety. At the same time, as a new type of environmentally friendly material, it has good economic and social benefits and possesses excellent promotional value.