[最新文献]法国和英国使用的在白垩岩中不同桩设计方法的回顾[12/10/2020]

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1 论文

A review of different pile design approaches in chalk used in France and the UK: case studies from French sites 法国和英国使用的在白垩岩中不同桩设计方法的回顾：法国工地的案例研究

Abstract: Design of piles in chalk is considered as an important issue for a number of geotechnical applications in Northern Europe. Few methods exist for predicting the ultimate axial pile capacity in chalk, but little guidance can be found regarding the design of driven piles in this complex material as experience is rather limited. This paper aims to study the short and long-term predictive performance of different pile design methods used in France and the UK where chalk is found widespread in the north-west coast and the south-east coast, respectively. Conventional methods used in France and the UK are compared by considering seven full-scale static load tests performed in Paris Basin and extracted from the LCPC pile database. The ratio of the measured vs calculated pile shaft resistance and base resistance value is analysed and the scatter of each method is studied. The comparison shows large differences between results. Extension of the database is of great importance to improve the predictive reliability. The last part discusses the evolution of the long-term capacity of driven piles in chalk due to ageing effects. Results show an increasing trend after driving, following a hyperbolic evolution curve.

在北欧，白垩岩中桩的设计被认为是一些岩土应用的重要问题。目前，预测白垩岩中桩的极限轴力的方法很少，但由于经验相当有限，对这种复杂材料中的打桩设计几乎没有指导意义。本文旨在研究法国和英国使用的不同桩设计方法的短期和长期预测性能，这两个国家的白垩土分别分布在西北海岸和东南海岸。通过考虑在巴黎盆地进行的7次全尺度静载试验，并从LCPC桩数据库中提取，对法国和英国使用的常规方法进行了比较。分析了测得的桩轴阻力与计算的桩轴阻力和基础阻力值的比值，并研究了各方法的散度。对比发现，结果之间存在较大差异。数据库的扩展对提高预测可靠性具有重要意义。最后一部分讨论了白垩岩中打入桩的长期承载力因老化效应的演变。结果显示，打入后呈上升趋势，遵循双曲线演化曲线。

2 相关文献

Note: '相关文献' 是按照Google的排序算法产生出来的.

[1] Comparison of different approaches of pile design in chalk

[2] Back analysis of static load tests of CFA piles in chalk

[3] Foundation design and construction

[4] Design and installation of piles in chalk

[5] Pile driveability in low-to-medium density chalk

[6] The design of bored piles in chalk

[7] The engineering properties of chalk with special reference to foundation design and performance

[8] Design of CFA piles in chalk

[9] Review of technical issues relating to foundations and geotechnics for offshore installations in the UKCS

[10] Design of piles – United Kingdom practice