高填方涵洞EPS板减荷施工技术研究.pdf

2011年10月下 施工技术 第40卷第351期 CONSTRUCTION TECHNOLOGY 67、 高填方涵洞EPS板减荷施工技术研究 曹周阳，王晓谋，顾安全，姜峰林2 (1.长安大学公路学院，陕西西安710064；2.广东省冶金建筑设计研究院，广东广州510000) [摘要]由于高填方涵洞受力过大，通常所设计的涵洞结构尺寸大、造价高、病害多.因此，在以往研究的基础上， 通过室内外试验，将一定厚度的EPS板铺设在盖板涵顶部进行减荷，结果表明：EPS板能够显著减小涵顶土压力， 试验测得涵顶土压力为土柱压力的0.28~0.47倍.同时，分析了EPS板在各种机械施工荷载作用下的受力情况， 根据计算结果，提出了一套EPS板顶进行土体回填的具体施工技术，并在实际工程中验证了该套技术的可行性，不 但保护了EPS板及达到减荷效果，而且保证了工程质量. [关键词]公路；高填方涵洞；EPS板；施工技术 [中图分类号]U449 [文献标识码]A [文章编号]1002-8498(2011)20-0067-04 Study on Construction Technology of Load Reduction with EPS Board for High Filling Culvert Cao Zhouyang' Wang Xiaomou' Gu Anquan' Jiang Fenglin2 (1.Highway College Chang'an University Xi'an Shaanxi 710064 China: 2.Guangdong Metallurgy and Architecture Design Institute Guangzhou Guangdong 510000 China) Abstract:Due to the large earth pressure of high filling culverts the mon.culvert structure has large size high cost and many diseases.Therefore on the basis of past research through indoor and outdoor tests a certain thickness EPS board is laid on the top of plate culvert to reduce the load.The results show that laying EPS board can significantly reduce the earth pressure on the top of culvert.The earth pressure on the top of culvert which is obtained from the tests is 0.28 to 0.47 times of that earth column pressure on the top of culvert.Meanwhile the stress conditions of EPS board with a series of mechanical construction loads are analyzed.According to the calculation results a set of specific construction technology for backfi...