南宁外环膨胀土路基处治技术及设计方案研究

›› 2011, Vol. 32 ›› Issue (S2): 359-365.

南宁外环膨胀土路基处治技术及设计方案研究

杨和平¹，王静¹，湛文涛^{1, 2}，李艳艳¹

1. 长沙理工大学特殊土工程研究所，长沙 410076；2. 湖北省公路工程咨询监理中心，武汉 430030

收稿日期:2011-05-18 出版日期:2011-08-10 发布日期:2011-08-26
作者简介:杨和平，男，1954年生，教授，博士生导师，主要从事路基路面工程、特殊土路基研究
基金资助:
国家自然科学基金项目资助（No. 50978035）；交通部西部科技项目资助（No. 200831800089）；交通部科技项目资助（No. 2009353311060）

Study of treatment technology and design scheme of expansive soil subgrade for Nanning outer ring expressway

YANG He-ping¹, WANG Jing¹, ZHAN Wen-tao^{1, 2}, LI Yan-yan¹

1. Research Institute of Special Soil Engineering, Changsha University of Science and Technology, Changsha 410004, China; 2. Highway Construction Supervising and Consulting Center of Hubei Province, Wuhan 430030, China

Received:2011-05-18 Online:2011-08-10 Published:2011-08-26

摘要/Abstract

摘要： 拟建南宁外环路穿越膨胀土分布区，若实施刚性支挡难以保证开挖边坡稳定，沿用弃土换填方案填筑路堤至少需废240万方，使工程投资大增并严重破坏生态环境，为此，研究运用膨胀土处治新技术进行路基工程设计。通过系统土性、填料性质试验，论证了物理处治技术修建膨胀土路堤的可行性；采取FLAC和极限平衡分析，获得实施柔性支护前后典型膨胀土堑坡的稳定性。基于试验、理论分析并借鉴交通部西部膨胀土项目的成功经验，提出两种封闭包盖措施填筑南宁膨胀土下路堤、不同边界条件下的路堑边坡柔性支护设计方案。对比分析表明，采用新技术效益明显，能实现南宁外环高速路安全、经济、节能环保的修建目标

关键词: 膨胀土路基, 处治技术, 填料性质, 柔性支护, 设计方案

Abstract: The proposed Nanning outer ring expressway crosses the distribution area of expansive soil, the stability of cut slope is difficult to be ensured if using rigid retaining; while the design method of replacement will to considerably increase the construction investment and seriously damage the ecological environment because more than 2.4 million cubic expansive soils will be abandoned. Therefore, the new treatment technology of expansive soil is discussed. The feasibility of building expansive soil sabgrade by the physical treatment technique is demonstrated through the series of soil and filler quality tests. The stability of cut slope by implementing flexible support is analyzed by the fast Lagrangian Analysis of Contihu(FLAC) and limit equilibrium method. Based on the laboratory tests and theoretical analysis and referenced the successful research experience of West China traffic of expansive soil project, two methods of the treatment with the characteristics of “enveloping and wrapping” for Nanning expansive soil subgrade and design of flexible supporting for cut slope under different boundary conditions are proposed, so as to provide the basis for the rational use of Nanning expansive soil, and for the construction of highways with a low-carbon and environmental mode

Key words: subgrade of expansive soil, treatment technology, filler quality, flexible support, design scheme

中图分类号:

TU 443

杨和平，王静，湛文涛，李艳艳. 南宁外环膨胀土路基处治技术及设计方案研究[J]. , 2011, 32(S2): 359-365.

YANG He-ping , WANG Jing , ZHAN Wen-tao , LI Yan-yan. Study of treatment technology and design scheme of expansive soil subgrade for Nanning outer ring expressway[J]. , 2011, 32(S2): 359-365.

参考文献

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

本文评价

推荐阅读 10

[1]	刘玉成，曹树刚，刘延保. 可描述地表沉陷动态过程的时间函数模型探讨[J]. , 2010, 31(3): 925 -931 .
[2]	李元亨，陈国良，刘修国，尚建嘎. 主TIN模式下面向拓扑的三维地质块体构建方法[J]. , 2010, 31(6): 1902 -1906 .
[3]	杨爱武，闫澍旺，杜东菊，赵瑞斌，刘举. 碱性环境对固化天津海积软土强度影响的试验研究[J]. , 2010, 31(9): 2930 -2934 .
[4]	何思明，吴永，李新坡. 滚石冲击碰撞恢复系数研究[J]. , 2009, 30(3): 623 -627 .
[5]	张波，李术才，杨学英，王锡平. 三维黏弹性人工边界地震波动输入方法研究[J]. , 2009, 30(3): 774 -778 .
[6]	陈林，张永兴，冉可新. 考虑剪应力作用的挡土墙主动土压力计算[J]. , 2009, 30(S2): 219 -223 .
[7]	石崇，徐卫亚，张玉，李德亮，刘和. 基于元胞自动机模型的堆积体动力学参数研究[J]. , 2011, 32(6): 1795 -1800 .
[8]	汪成兵. 均质岩体中隧道围岩破坏过程的试验与数值模拟[J]. , 2012, 33(1): 103 -108 .
[9]	宋义敏，姜耀东，马少鹏，杨小彬，赵同彬 . 岩石变形破坏全过程的变形场和能量演化研究[J]. , 2012, 33(5): 1352 -1356 .
[10]	夏艳华，白世伟 . 基于水平集的复杂三维地层模型建模及在地下工程中的应用研究[J]. , 2012, 33(5): 1445 -1450 .