改进的分层总和法在铁路地基沉降中的应用

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摘要研究目的：高速铁路对控制沉降提出了很高的要求，而地基的沉降计算一直是工程实践中未能很好解决的问题。为准确计算地基的沉降量，在总结已有研究成果的基础上，利用室内压缩试验，提出割线模量法，然后利用Bussinesq解，来计算铁路地基最终沉降量，并验证该方法的可行性，为类似工程提供参考。

研究结论：依据实际工程，通过传统分层总和法、割线模量法、扩散角法所计算的沉降结果与现场实际观测结果比较，发现割线模量法所得的结果与实际结果较接近，表明该方法相对于其他两种方法具有较高的精确性，更具有可行性。

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	严栋

关键词 ：压缩试验, 割线模量, Bussinesq解, 分层总和法

Abstract：Research purposes: The settlement of hish—speed railway must be strictly controlled，but it is very difficult to accurately calculate the foundation settlement in design of high—speed railway．In order to calculate the settlement of foundation accurately，a secant modulus method is offered through doing the indoor compression test on the basis of the existing research results．The final foundation settlement of railway is obtained by using the secant modulus method and the Bussinesq§solution．The verification shows this method is available and can be as the reference to the similar works．

Research conclusions: From the comparison of the calculation results obtained with the traditional layed summation method，the secant modulus method and the angle of spread method for one actual construction project，it was found the results obtained with the secant modulus method Was close to the actual foundation settlement．This indicates that the secant modulus method iS accurate and available．

Key words： compression test secent modulus Bussinesqg solution layed summation method

收稿日期: 2010-08-16

PACS:

U213

作者简介: 严栋,1982年生，男，硕士研究生，助理工程师。

引用本文:

严栋. 改进的分层总和法在铁路地基沉降中的应用[J]. 铁道工程学报, 2010, 27(10): 26-29.
YAN Dong. Application of Improved Layed Summation Method in Calculation of Railway Foundation Settlement. 铁道工程学报, 2010, 27(10): 26-29.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2010/V27/I10/26

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