文档介绍：摘要
桥头跳车是目前公路建设中急需解决的问题之一。本文利用汽车平顺性评价的理论,建立“车辆-人体-座椅”振动系统,对台背不同差异沉降对行车舒适性的影响进行分析,并结合相关文献资料的结果,提出台背过渡段沉降的控制标准。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。本文还对大孔隙混凝土这一材料进行试验分析,提出了台背一定范围内采用大孔隙混凝土填筑,可以解决台背一定范围内的土体不易压实和台背排水等问题。最后本文利用分层总和法对台背地基的工后沉降量进行计算分析。
关键词:桥头跳车差异沉降行车舒适性扩大基础大孔隙混凝土
ABSTRACT
Bridgehead bump is one of the urgent problems in the process of highway construction. In this paper, a mechanic model of man-chair-vehicle system with 3 degrees of freedom is built to analyze the effects on automobile fort due to the differential settlement between roadway approach embankments and bridge structures. On the base of some field survey results on abundant literature and the calculating results in this paper, the controlling criterion of the differential settlements on approach embankment has been put forward. 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. The hollow concrete has been filled in the interface between abutment and approach embankment. It is essful to solve the problem of paction near the abutment because of restricted access. It is also very useful to drainage of the embankment. At last, the foundation settlements are calculated and analyzed.
Keywords:bridgehead bump differential settlement fort
enlargement base hollow concrete
目录
第一章绪论……………………………………………………………………(1)
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第二章研究方案和研究方法………………………………………………(6)
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第三章路桥过渡段沉降控制指标研究…………………………………(10)
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第四章路桥过渡段沉降控制指标应用…………………………………(28)
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(28)
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