提出将土工格室与填入其内的碎石填料组成的加筋基层置于路堤顶部,以构成一种新型的土工格室低路堤-刚性路面结构体系,并通过2组室内模型试验对该体系的受力变形特点进行研究。采用便携式路面弯沉仪测定了试验路堤中土工格室基层加入前后动态回弹模量的变化,并通过自行设计的一套可实现往复车载的小型模型车的驱动装置模拟作用于路面上的实际车辆荷载。试验结果表明:土工格室基层的加入可显著提高碎石基层的动态回弹模量值,减少直接承受车辆荷载车道的整体平均沉降;并能带动相邻板块下的土体协同工作,提高车辆荷载的扩散均化能力,减少相邻车道间的差异沉降。
Abstract
A new geocell reinforced low embankment and rigid pavement system (GRLERPS) was proposed. In the system, reinforced layer composed of geocell and its internal gravel filling was put on top of embankment. The forcing and deformation characteristics of the new GRLERPS were studied by two groups of tests. Variation of dynamic resilient modulus before and after imbedding geocell base in test embankment was measured by portable pavement deflector. A drive of small scale model car which can realize reciprocating vehicle load was designed to simulate actual vehicle load acted on pavement. The results show that imbedding of geocell base into the general low embankment system can enhance the dynamic resilient modulus of gravel base significantly, can reduce the total settlement of the roadway of bearing vehicle load directly, also can efficiently transfer loads among roadway and can enhance the collaborative work between slabs to distribute the vehicle load, it will help to decrease differential settlement of adjacent roadways.
关键词
道路工程 /
土工格室 /
模型试验 /
往复车载
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Key words
road engineering /
geocell /
model test /
reciprocating vehicle load
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中图分类号：
U416.1
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参考文献
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脚注
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基金
国家自然科学基金项目(51078138)
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