广东省软土地区高速公路改扩建勘察技术要点

Investigation Methods for Highway Widening in Soft Soils of Guangdong Province

目前国内许多地区正在逐步开展既有高速公路升级改扩建工程,以满足现有交通及经济转换需求。广东省地处珠江三角洲,软土分布广、工程性质差,如何在改扩建工程中对软土地基进行有针对性的勘察非常重要。通过收集分析广东省已有改扩建工程的实际经验资料,对软土的性质、软土工程勘察的主要内容、室内试验及原位测试的相关要求等进行探讨。在勘察工作开始之前,应要全面收集已建工程的监测变形、加固处理方式等资料进行综合分析,以便做出合理的勘探点布置方案并选择合适的室内试验、原位测试方法。总结提出了针对广东省软土地区高速公路改扩建勘察技术要点,可供其他软土地区高速公路改扩建工程勘察参考借鉴。

To satisfy the requirements of the existing transportation and economic transformation needs,some parts of China are gradually upgrading and widening existing expressways.Guangdong Province is in the Pearl River Delta,the soft soil is extensive and poor in nature,so it is very important to perform the targeted investigation in the soft soils in the reconstruction and widening projects.By collecting and analyzing the practical experience data of the existing reconstruction and widening projects in Guangdong Province,this paper discusses the properties of soft soils,the main contents of soft soil engineering investigation,the related requirements of laboratory test and in situ test,etc.Before the investigation begins,it is necessary to comprehensively collect the monitoring deformation,reinforcement treatment and other data of the existing project for comprehensive analysis,to make a reasonable exploration plan and select the appropriate laboratory test and in-situ test method.This paper summarizes and proposes the key points of investigation methods for the highway reconstruction and widening in soft soils in Guangdong Province,and provides guidance and reference for the investigation of highway reconstruction and widening projects in other soft soils.