改良粉质黏土公路路基的竹筋加固技术研究

doi:10.13722/j.cnki.jrme.2014.s2.106

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摘要竹筋加筋土技术以其取材方便，环保经济的特点，具有很好的推广应用价值。以川南地区兴文县某石油井场低等级公路路基改良为例，设计构造竹筋加固改良粉质黏土公路路基断面。通过室内试验获得竹材、粉质黏土以及草灰改良过的粉质黏土的基本物理力学性能参数，并确定采用草灰(20%)或者石灰(6%)改良含水率为29%的粉质黏土；通过FLAC3D软件比选改良粉质黏土公路路基断面，确定最优竹筋层距为1.0 m；最后通过监测技术，测得其路基的回弹弯沉为2.69 mm。结果表明，路基的回弹弯沉值可达到低等级公路路基的要求，该技术在加固改良粉质黏土低等级公路路基的工程实际应用方面是可行的。

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	雷挺
	文华
	张玲玲
	姚勇

关键词 ：土力学, 竹筋, 粉质黏土, 路基, 弯沉值

Abstract：Bamboo reinforced soil technology has been widely applied to foundation reinforcement engineering due to its advantages of environmental friendliness and economy. Taking the low-grade highway subgrade improvement of oil well site in Xingwen County，Southern Sichuan as example，the feasibility of bamboo reinforced silty clay technology was discussed and silty clay highway subgrade cross sections reinforced with bamboo were designed and constructed. The basic physico-mechanical parameters of bamboo wood，silty clay and pulverin silty clay were obtained by means of experiments，and mixing ratios，20% pulverin or 6% lime，of improved silty clay were determined. Then，Based on FLAC3D，the optimal subgrade cross-section dimensions of the bamboo reinforcement silty clay were determined，and the best bamboo layer distance is 1.0 m. Finally，the rebound deflection values(2.69 mm) of the subgrade was measured with the monitoring technology. It is shown that the rebound deflection of the subgrade can match the requirements of the low-grade highway subgrade，and it is feasible that bamboo bars are applied in reinforced silty clay low-grade highway subgrade.

Key words： soil mechanics bamboo bars silty clay subgrade deflection value

引用本文:

雷挺，文华，张玲玲，姚勇. 改良粉质黏土公路路基的竹筋加固技术研究[J]. 岩石力学与工程学报, 2014, 33(S2): 4246-4251.
LEI Ting，WEN Hua，ZHANG Lingling，YAO Yong. BAMBOO REINFORCEMENT TECHNOLOGY IN IMPROVED SILTY CLAY ROAD SUBGRADE. , 2014, 33(S2): 4246-4251.

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https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.s2.106 或 https://rockmech.whrsm.ac.cn/CN/Y2014/V33/IS2/4246

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