| 高速公路加宽工程路面结构应力及适应性研究 |
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| 引用本文： | 沈立森,杨广庆,高民欢,陈君朝.高速公路加宽工程路面结构应力及适应性研究[J].石家庄铁道大学学报(自然科学版),2013(4):77-82. |
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| 作者姓名： | 沈立森 杨广庆 高民欢 陈君朝 |
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| 作者单位： | [1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]河北省高速公路管理局,河北石家庄050061 [3]河北省高速公路京石改扩建筹建处,河北保定071051 |
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| 基金项目： | 河北省交通运输厅科技计划项目（Y.2011001） |
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| 摘 要： | 公路改扩建是高速公路建设的重要课题。基于国内外研究现状，结合工程实际建立有限元模型，研究地基处理前后路面结构层附加应力响应，计算路面结构层的强度发挥率，确定应力控制层，制定差异沉降控制标准。主要结论为：路面底基层的强度发挥率最大，为路面应力控制层；通过改变复合地基桩体和格栅参数，同时考虑安全系数，得出差异沉降控制标准为0．5％。对应的处理措施为：桩体模量为10．0GPa、桩体长度为15m、桩体间距为2．0m；格栅模量为1．0GPa、格栅长度为7m。
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| 关 键 词： | 改扩建 有限元 强度发挥率 应力控制层 差异沉降 |
Study on Structural Stress and Adaptability of Pavement in Highway Subgrade Widening Engineering |
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| Shen Lisen,Yang Guangqing,Gao Minhuan,Chen Junchao.Study on Structural Stress and Adaptability of Pavement in Highway Subgrade Widening Engineering[J].Journal of Shijiazhuang Railway Institute(Natural Science),2013(4):77-82. |
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| Authors: | Shen Lisen Yang Guangqing Gao Minhuan Chen Junchao |
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| Institution: | 3 ( 1. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China; 2. Hebei Province Pighway Administration, Shijiazhuang 050061, China; 3. Department of Preparatory Construction for Hebei Province Jingshi Reconstruction ＆ Extension Expressway, Baoding 071051, China) |
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| Abstract: | Reconstruction and expansion is an important topic in highway construction. Based on the present situation in domestic and foreign research, the finite element model is established with practical engineering. The pavement structure stress response is researched before and after the treatment of foundations. The strength ac- tion rate of pavement layer is calculated and the stress control layer is determined. The control standards of differ- ential settlement is formulated. The results show that the strength action rate of pavement subbase, stress control layer, is maximal. Considering the safety factor, the differential settlement control standard is 0.5 %. The corre- sponding treatment measures are： the pile modulus is 10, 0 GPa, the pile length is 15 m, the pile spacing is 2.0 m, the modulus of 1.0 GPa, and grating length is 7 m. |
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| Keywords: | reconstruction and expansion finite element strength action rate stress control differential settlement |
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