强风化软岩路基填筑适宜性研究

›› 2006, Vol. 27 ›› Issue (6): 903-907.

强风化软岩路基填筑适宜性研究

刘新喜¹，夏元友¹，刘祖德²，蔡俊杰³，陈向阳⁴

1. 武汉理工大学土木工程与建筑学院，武汉 430070；2. 武汉大学土木建筑学院，武汉 430072； 3. 湘潭市昭山经济建设投资公司，湘潭 411100；4. 湖南城市学院土木工程学院，益阳 413000

收稿日期:2005-10-17 出版日期:2006-06-10 发布日期:2013-11-14
作者简介:刘新喜，男，1963年生，博士，现为武汉理工大学在站博士后，主要从岩土工程方面的研究
基金资助:
教育部新世纪优秀人才支持计划（No. NECT040723）；湖北省自然科学基金（No. 2005ABB022）。

Study on suitability for embankment of highly weathered soft rock subgrade

LIU Xin-xi¹, XIA Yuan-you¹, LIU Zu-de², CAI Jun-jie³, CHEN Xiang-yang⁴

1. School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, China; 2. School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China; 3. Xiangtan Zhaoshan Economy Construction Investment Company, Xiangtan 411100, China; 4. College of Civil Engineering, Hunan City University, Yiyang 413000, China

Received:2005-10-17 Online:2006-06-10 Published:2013-11-14

摘要/Abstract

摘要： 通过对强风化软岩压实特性试验研究表明，填料的承载比（CBR值）随压实度的增大而增大，填料具有良好的压实性能，可用于高等级公路路基填筑；同时，利用室内三轴剪切仪模拟接近实际的应力路径，对强风化软岩进行干—湿双线平行试验和在复杂应力状态下不同压实度的湿化变形试验，试验结果表明：路面不发生开裂或塑性破坏的临界应变值为2 %；随着压实度的增大，湿化变形随之减小；在围压200 kPa时，随着偏应力的增大，剪胀也增大。将试验成果用于湘潭市昭山大道路基填筑，提出了路基95区换填黏性土、湿法填筑和提高90区压实度等施工措施。

关键词: 强风化软岩, 湿化变形, 压实度, 路基填筑

Abstract: The compaction character experiments under different compaction degrees showed that the CBR value increased with the filling compaction degree increasing; the filling is provided with nicer compaction property, so it can be used for highly weathered soft rock to fill high grade highway embankment. Triaxial shear apparatus with an approximate actual stress path was used to do dry-wet crewel parallel experiment and wetting deformation experiment of different compactions under complicated stress function. The result shows that crazing and plastic destruction will not take place on road surface when the critical strain value is 2 %，the slaking deformation is reduced with compacting factor of the samples increasing and the shear swelling deformation is increased with deviator strain increasing when ? 3 equals to 200 kPa. Testing results are applied to subgrade embankment of the Zhaoshan Road in Xiangtan city, and construction measures of the embankment of clay in 95 area, wetting embankment and increasing compaction degree of the filling in 90 area are put forward.

Key words: highly weathered soft rock, slaking deformation, compacting degree, embankment for subgrade

中图分类号:

TU 457

刘新喜，夏元友，刘祖德，蔡俊杰，陈向阳 . 强风化软岩路基填筑适宜性研究[J]. , 2006, 27(6): 903-907.

LIU Xin-xi , XIA Yuan-you , LIU Zu-de , CAI Jun-jie , CHEN Xiang-yang . Study on suitability for embankment of highly weathered soft rock subgrade[J]. , 2006, 27(6): 903-907.

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