扩大基础是将墩(台)及上部结构传来的荷载由其直接传递至较浅的支承地基的一种基础形式,一般采用明挖基础的方法进行施工,故又称之为明挖扩大基础或浅基础。正常工况下,扩大基础能提高拱坝整体刚度,提升坝体变形的对称性,并改善坝建基面附近岩体的应力状态。不平衡力和塑性余能范数作为评价指标对比表明,扩大基础能明显减少坝体、坝踵和坝趾范围的不平衡力,减小坝体屈服区,工程各部分余能范数均有所降低,扩大基础对拱坝局部坝踵、坝趾区域及拱坝整体稳定性的加固作用明显。
...网 关键词】市政工程;桥梁;扩大基础;施工;技术;措施 [gap=501]Key words】Municipal engineering;Bridge;Expanding base;Construction;Technology; measures ...
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In this paper, the enlargement base has been set between subgrade and foundation. The finite element method is employed to analyze the influence of the modules and the thickness of the base material.
在路基与地基之间设置扩大基础,利用有限元分析不同基础模量和基础厚度对应力扩散的影响。
参考来源 - 路桥过渡段沉降控制指标及控制方法研究·2,447,543篇论文数据,部分数据来源于NoteExpress
南昌市玉带河顺外路桥为一净跨22米的门式刚架桥,采用扩大基础。
The Shunwai Road Bridge of Yudai River in Nanchang is a portal rigid-jointed frame bridge with 22-meter net-span, adopting ampliate base.
因此,从基础埋置深度的确定和基础的验算内容两方面分析明挖扩大基础的设计与计算,具有重要的实践意义。
Therefore, it is meaningful in practice that designs and calculates for open-cut foundation from two aspects which are bury length determining and checking computation contents of foundation.
明挖扩大基础基坑开挖时,土方采用挖掘机开挖,并由人工配合进行边坡修理、基坑顶面排水沟的修建等辅助工作。
For open spread foundation, the pit is excavated by excavators for earth work with manpower to trim the side slope and build the ditch on top of base pit.
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