| 摘要: |
| 为了分析适用于简易机场快速修建工程中的合理道面结构，通过大量的室内土工试验和足尺试验研究，对纤维格栅水泥土应用于跑道基层的使用性能进行了研究.室内土工试验研究发现:水泥质量分数为10%和12%的水泥土7d干抗压强度可达3MPa左右，饱水抗压强度可达2MPa以上，7d水稳定性系数基本达到70%左右，表明水泥土早期强度较高，具有较好的强度特性和水稳定性.足尺试验结果表明:玻璃纤维格栅的铺设提高了道面结构整体回弹模量，最大增幅可达175%，各龄期的回弹模量可达19068~43508MPa；玻璃纤维格栅可使道面结构具有更大的荷载分布能力和更好的板体作用，并能够明显减少干缩裂缝产生和有效控制裂缝发展，在一定的通行次数内道面结构弯沉值小于1mm.通过对比试验表明，玻璃纤维格栅水泥土基层具有较强的承载能力、较好的抗变形性和较高的整体性，能够满足简易机场的修建和使用需求. |
| 关键词: 机场工程 简易机场 纤维格栅 水泥土 整体回弹模量 弯沉盆曲线 |
| DOI：103969/jissn1007 9629201406018 |
| 分类号: |
| 基金项目:横向科研基金资助项目（050101） |
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| Research on Fiber Grid Cement Soil Base Performance of Airstrip |
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LIU Junzhong1, WENG Xingzhong1, ZHANG Jun1, LU Chunqi2, ZHANG Jianpo3, DU Xiaopeng3
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1.Department of Airfield and Building Engineering, Air Force Engineering University, Xi’an 710038, China;2.The Second Engineering Brigade of Chinese Airport Construction, Xuzhou 221005, China;3.Air Force Engineering Environmental and Quality Supervision Center, Beijing 102208, China
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| Abstract: |
| In order to investigate the reasonable pavement structure for rapid construction of airstrip, the performance of fiber grid cement soil runway base has been researched through a large number of inside geotechnical experiments and full scale tests. Inside geotechnical experiments results are shown to be as follows: the 7d dry unconfined compression strength of 10% and 12%(by mass) cement soil reach around 3MPa, while saturated unconfined compression strength reach up to 2MPa, and the water stability coefficient reach to 70%. It shows that, the strength characteristic and water stability of cement soil can satisfy the construct demand of airstrip. Full scale test results show that: glass fiber grid improves the holistic elastic modulus of pavement; significantly reduces the drying shrinkage crack and effectively controls the crack development. Holistic elastic modulus runs up to 1906843508MPa at different periods, the increase margin up to 175%, and the rebound deflections less than 1mm under ten thousands traffic times. Contrast test shows that glass fiber grid cement soil base can meet the construction and operation requirements of airstrip with strong bearing capacity, good deformation resistance, and high integrity. |
| Key words: airport engineering airstrip fiber grid cement soil holistic elastic modulus deflection basin curve |
