浅谈两种不同路基处理方法的合理性

Elementary Discussion on Rationality of Two Different Subgrade Treatment Methods

近年来,由于超载现象严重,路基早期病害出现较多。全国多地城市道路设计及施工中对于路基处理多采用高压实度标准、深层换填等措施,导致土方量大、工程投资高,在技术经济上不具有优势。分析长江中下游江北岸某市规一路结构设计及路基处理方案,并与浦东新区同等级道路做对比,对其路基土质、压实度、换填方案等关键问题做了深入研究分析,得出了关于不良土质、压实度标准以及路基换填方面的结论,为国内同等级道路路基设计与施工提供了有益参考。

In recent years, the faults appear more early in the subgrade because of serious overload. The measures of high compaction degree and deep layer gravel replacement are more taken for the subgrade treatment in the design and construction of urban roads in the whole country which leads to the large earthwork quantity and high engineering investment as well as no advantages in the technology and economy.The article analyzes the structural design and subgrade treatment scheme of a planned road in a city at the north bank of the middle and lower reaches of Changjiang River, and further studies and analyzes the key problems of its subgrade soil quality, compaction degree and replacement schemes by comparing with the same roads in Pudong New Area. The conclusion regarding to the poor soil quality, compaction degree standard and subgrade replacement is obtained, which can be referred for the design and construction of the similar road subgrades in China.