深厚软土区域挡土墙设计对策研究

Research on Design Countermeasures of Retaining Wall in Deep Soft Soil Area

摘要:

为研究深厚软土区域挡土墙的设计对策，以苏州市钟园路对接强胜路工程为例，依据工程地质勘察报告，通过对场地环境、地质条件、管线敷设等情况的分析，对桥梁引坡段的挡土墙进行了形式比选和结构方案研究。分析结果表明：由于该挡土墙位于复杂软土上方，下伏地层承载力不足，故采用悬臂式挡土墙进行支挡，并在挡土墙地基承载力不足区域先采用高压旋喷桩进行地基处理。对挡土墙的稳定性和地基承载力进行了验算分析，结果表明了挡土墙设计方案的合理与可靠，为苏州等软土地区类似工程提供了有益的参考。

Abstract:

In order to study the design countermeasures of retaining walls in deep soft soil areas, taking the project of Zhongyuan Road connecting with Qiangsheng Road in Suzhou as an example, based on the engineering geological survey report, the type selection and structure scheme of the retaining wall in the bridge approach slope section are studied through the analysis of site environment, geological conditions, pipeline laying and so on. The study result shows that the bearing capacity of the underlying stratum is insufficient because of the retaining wall located on the complex soft soil. Therefore, the cantilever retaining wall is used for the retaining, and the high-pressure rotary jet pile is firstly used to treat the subgrade in the area where the bearing capacity of retaining water subgrade is insufficient. The stability of the retaining wall and the bearing capacity of the subgrade are checked and analyzed. The result explains that the design scheme of retaining walls is rational and reliable, which provides a useful reference for similar projects in soft soil areas such as Suzhou.