沪苏浙高速公路软基处理评价

Evaluation of soft ground treatment in Shanghai-Jiangsu-Zhejiang highway

调查统计了不同处理方法在沪苏浙高速公路(江苏段)的应用情况、软基处理效果以及病害的工程措施。通过研究可以得出:等超载预压、湿喷桩和预应力管桩是沪苏浙高速公路(江苏段)的主要处理方法;软基处理方法总体上达到了预期目标,没有出现桥头跳车现象,裂缝为横向裂缝,车辙为压密型和流动型车辙;车辙和裂缝较明显路段大多发生在不同处理方法的结合处、软土厚度较大或工后沉降较大路段,分别采用微表处及热再生和开缝灌浆进行治理,车辙和裂缝情况能够得到有效控制。

The application and effect of soft ground treatment in Shanghai-Jiangsu-Zhejiang highway(Jiangsu section) are investigated. Through the researches, it can be concluded that the surcharge preloading, wet grouting piles and prestressed pipe piles are the main treatment methods. The soft ground treatment generally achieves the anticipated goal with no phenomenon of vehicle dumping. Ruts and cracks occur mostly in the section of soft soil, large settlement and the junction of different soft ground treatments. The micro surfacing and thermal regeneration are adopted to repair the ruts while the grouting is adopted to repair the transverse cracks, respectively. The ruts and transverse cracks can be effectively controlled.