铁路地基承载力确定方法研究

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摘要研究目的：合理确定地基承载力，是铁路工程地质勘察中的关键问题之一，只有准确确定了地基承载力才能保证桥梁基础类型选择合理、路基基底加固方案可靠，使桥梁及路基工程的工后沉降变形控制在允许的范围内，确保铁路运营的安全性和舒适性。本文以某铁路工程试验段为例，系统分析了多种地基承载力确定方法的适用性，探讨了确定铁路地基承载力的适宜方法。

研究结论：(1)确定地基承载力的各种手段有各自的特点，手段之间也存在一定的联系和差异，采用任何单一的方式确定地基土的承载力都是不科学和不可靠的；(2)地基承载力的确定必须采用综合勘探的手段，以载荷试验为基础，对比勘探试验、静力触探及其他原位测试方法综合确定；(3)本文研究成果可为相关铁路工程勘察设计提供借鉴和参考。

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	周正礼

关键词 ：地基承载力, 钻探, 原位测试, 综合勘察

Abstract：Research purposes: Determining the bearing capacity of the foundation is one of the key problems in railway engineering survey. Determine the bearing capacity of the foundation is only reasonable that the settlement after deformation controlled within the allowable range，in order to ensure the safety and comfort of rail operations. Based on the engineering test section of a certain railway as an example, analysis the applicability of methods for determination of foundation bearing capacity, discuss the appropriate method to determine the bearing capacity, and providing the reference for related design.

Research conclusions:(1)The various means of determining the bearing capacity have their own characteristics, there are certain connections and differences among means, using any single approach to determine the bearing capacity of foundation soil is unscientific and unreliable. (2) To determine rail foundation bearing capacity, the means of integrated exploration must be used which is based on the load test and compare exploration sampling, static cone penetration test and other in-suit test method. (3)This paper can provide some reference to determine the bearing capacity of foundation for railway engineering.

Key words： bearing capacity of foundation drilling in-suit test integrated survey

收稿日期: 2013-08-01

PACS:

TU42

作者简介: 周正礼，1965年出生，男，高级工程师。

引用本文:

周正礼. 铁路地基承载力确定方法研究[J]. 铁道工程学报, 2014, 31(2): 27-33.
ZHOU Zheng-li. Research on the Method of Determining the Bearing Capacity of Railway Foundation. Journal of Railway Engineering Society, 2014, 31(2): 27-33.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2014/V31/I2/27

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