全风化花岗岩改良土路基的长期稳定性试验研究

›› 2011, Vol. 32 ›› Issue (S1): 596-0602.

全风化花岗岩改良土路基的长期稳定性试验研究

周援衡¹，王永和¹，卿启湘²，何群¹

1. 中南大学土木建筑学院，长沙 410075；2. 湖南大学机械与运载工程学院，长沙 410082

收稿日期:2010-06-24 出版日期:2011-05-15 发布日期:2011-05-16
作者简介:周援衡，男，1960年生，博士研究生，主要从事岩土工程、航道工程等方面的研究工作
基金资助:
国家自然科学基金项目资助（No. 50678177）；铁道部科技研究开发计划资助（No. 2005K002B4）。

Experimental study of long-term stability of improved granitic residual soil subgrade for high-speed railway

ZHOU Yuan-heng¹, WANG Yong-he¹, QING Qi-xiang², HE Qun¹

1. School of Civil and Architectural Engineering, Central South University, Changsha 410075, China; 2. School of Mechanical and Vehicle Engineering , Hunan University, Changsha 410082, China

Received:2010-06-24 Online:2011-05-15 Published:2011-05-16

摘要/Abstract

摘要： 全风化花岗岩用于高速公路填料已有成功的案例，但由于高速铁路路基变形控制更为严格，能否用于高速铁路路基填料还没有得到实体工程的验证。基于全风化花岗岩及其改良土的工程力学性质和变形特性，使用PMS-500型循环加载设备对全风化花岗岩改良土路基实体工程进行了现场循环加载试验研究，模拟分析了不同轴重列车荷载长期循环作用下浸水前后全风化花岗岩改良土路基的动态特性及沉降规律和其下雨前后路基性状变化。试验结果表明，全风化花岗岩改良土路基经过500万次列车模拟动荷载作用后，即使经历了如雨水长期浸饱路基的最为恶劣工况，最终沉降量不超过7.0 mm，证实了全风化花岗岩经过改良后能满足高速铁路变形控制的设计要求，可用于高速铁路的基床底层及路堤本体填料

关键词: 全风化花岗岩改良土, 高速铁路, 循环加载试验, 动态特性

Abstract: There has been success stories that granitic residual soil has been used to fill the embankment for expressways; however, the most stringent standard will be applied to high-speed railways subgrade cumulative deformation under the loads of moving trains of the track structure which locate on the substructure; that granitic residual soil can be used for high-speed railway subgrade has not been verified so far. Based on the granite residual soil and its improved soil mechanical properties and deformation characteristics, using PMS-500 cyclic load equipment experimental research on dynamic performance of granitic residual soil subgrade of Wuhan-Guangzhou high-speed railway in Qingyuan region of Guangdong Province were made to study the applicabifity of granitic residual soil for filling embankment and subgrade bed. The dynamic performance and deformation performance of improved granitic residual soil subgrade bed were analyzed under 5×106 cyclic loads with and without influence of the subgrade surface flooding, quality variation of the subgrade with and without influences of rainfall. It is indicated that all the dynamic indices and residual settlement of improved granitic residual soil subgrade meet the design requirements of high-speed railways; even though 6.7 m high improved granitic residual soil subgrade has been prolonged soaking saturated infiltration; its settlement is less than 7.0 mm so that the improved granitic residual soil could be used to fill the embankment and subgrade bed of high-speed railways.

Key words: improved granitic residual soil, high-speed railway, cyclic loading test, dynamic performance

中图分类号:

TU 452

周援衡，王永和，卿启湘，何群. 全风化花岗岩改良土路基的长期稳定性试验研究[J]. , 2011, 32(S1): 596-0602.

ZHOU Yuan-heng , WANG Yong-he , QING Qi-xiang , HE Qun. Experimental study of long-term stability of improved granitic residual soil subgrade for high-speed railway[J]. , 2011, 32(S1): 596-0602.

参考文献

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