对矩形闭合型地下连续墙桥梁基础的国内外研究现状及发展趋势进行了详细的述评,指出:矩形闭合型地下连续墙基础是一种新型的桥梁基础,在日本的桥梁工程中得到了大量应用并取得了良好的社会经济效益,但是闭合墙基础的承载机理和基础-地基共同作用规律尚未清楚;在我国,还没有形成较为成熟的设计计算方法;由于墙内土芯的存在,矩形闭合墙基础的荷载传递机理和承载性状相对比较复杂。研究内侧土芯对承载力的贡献,恰恰是闭合墙基础承载机理的核心问题。对闭合墙基础荷载传递机理和承载性状的研究,应主要关注内侧摩阻力的产生机理、分布规律和计算方法,墙-土-承台相互作用,承台的荷载承担状况等关键问题。
In this paper, the authors reviewed in detail the current status and developing trends in research on rectangular closed diaphragm wall as bridge foundation and pointed out that the rectangular closed diaphragm wall foundation is a new type of bridge foundation and has a great deal of application in Japan; thereby the social and economic benefit has been well gained. But it is no clear about bearing mechanism of the rectangular closed diaphragm wall and about interaction behavior of diaphragm wall and foundation. Moreover, a perfect approach to the design and calculation of closed diaphragm wall foundation has not formed in China. Due to there exists a soil core on the inner side of closed diaphragm wall, both load-transfer mechanism and bearing capacity of closed diaphragm wall is relatively complex. The contribution of soil core to bearing capacity is just about the quick of bearing mechanism of closed diaphragm wall, so the research on load-transfer mechanism and bearing capacity of closed diaphragm wall is paid attention to key problems such as the gener- ation, distribution and calculation of inner side resistance, the diaphragm wall-soil-cap interaction, and the effect of the cap and soil resistance under the cap.