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为了排除高等级公路的横向干扰,合理地降低路基高度,提高公路运输的通过能力,在“疏港公路工程技术研究”的攻关项目中,确定了“下穿式道路简单立交的结构型式和防水措施”专题的试验研究。由于津塘地区地下水距地表约50～60厘米,地基软弱(承载力约58.84～78.45PKa),地势平坦,不易排水等不良的水文、地质特点,因此在该地区选择何种简交型式,采用何种结构物方有利于软弱地基的处理;在结构物中如何有效地防水和排水,以取得最高的技术经
In order to eliminate the horizontal interference of high-grade highways and reasonably reduce the height of roadbed and improve the capacity of road transport, in the research project of “technical research on port highway engineering”, the paper determined the structure type and waterproof of simple underpass road interchange Measures "the topic of experimental research. As the groundwater in Jintang area is about 50-60 centimeters above the surface, weak foundation (carrying capacity of 58.84-78.45PKa), flat topography, difficult drainage and other undesirable hydrological and geological features, the type of concise type to choose in this area is What kind of structure is conducive to the treatment of soft foundations; how to effectively waterproof and drained structure in order to obtain the highest technical