Metastatic?Pattern?of?the?Worst?Loading?Position?at?Slab?Corner?of??Cement?Concrete?Pavement?under?Voidage

doi:10.3969/j.issn.1674-0696.2009.05.14

Journal of Chongqing Jiaotong University(Natural Science) ›› 2009, Vol. 28 ›› Issue (5): 865-869.DOI: 10.3969/j.issn.1674-0696.2009.05.14

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Metastatic?Pattern?of?the?Worst?Loading?Position?at?Slab?Corner?of??Cement?Concrete?Pavement?under?Voidage

ZENG Xiao-jun¹, ZENG Sheng², XU Jia², GONG Xian-bing³

1.?Test?Center?of?Guangdong?Province?Communication?Group,?Guangdong?Guangzhou?510420,?China;?2.?School?of?Traffic?＆?Transportation?Engineering,?Changsha?University?of?Science?＆?Technology,?Hunan?Changsha?410076,?China;??3.?Hunan?Expressway?Administration?Bureau,?Hunan?Changsha?410001,?China

Received:2009-05-19 Revised:2009-06-11 Online:2009-10-15 Published:2015-04-15

水泥混凝土路面板角脱空状态下最不利荷位转移规律

曾小军¹,曾??胜²,许??佳²,龚先兵³

1.广东交通集团检测中心,广东广州510420;2.长沙理工大学交通运输工程学院,湖南长沙410076; 3.湖南省高速公路管理局,湖南长沙410001

作者简介:曾小军(1978—),男,广西玉林人,助理工程师,硕士,主要从事路面性能评价方面的研究工作。E-mail:xjzxj1126@126.com。
基金资助:
湖南省自然科学基金项目( 06 jj 4072)

Abstract

Abstract: Based?on?the?calculation?of?the?loading?stresses?at?both?the?middle?of?longitudinal?joint?and?the?slab?comer?when?the?void?size?is?varied,?the?metastatic?pattern?of?the?worst?loading?position?of?slab?under?voidage?is?analyzed.?And?the?effect?of?voidage?beneath?cement?concrete?pavement?slab?on?the?service?life?of?the?slab?is?also?studied.?The?research?result?shows?that?with?the?enlargement?of?voidage,?the?maximum?stress?position?transfers?from?the?middle?at?longitudinal?joint?to?the?slab?cor?ner.?The?boundary?of?voidage?area?and?non-void?area（?that?is?the?hypotenuse?of?triangle?void?area）?becomes?the?worst?loading?position?when?the?void?size?L?exceeds?0.?7m.?According?to?the?research,the?suggestion?is?given?that?the?strengthening?treatment?should?be?taken?to?prevent?slab?fracture?when?the?void?size?is?larger?than?0.4m.

Key words: pavement engineering , cement concrete pavement , voidage , worst loading position , metastatic pattern ;

摘要： 通过计算板角不同脱空尺寸时纵边中部与板角荷载作用下受荷点的荷载应力,分析脱空混凝土板的最不利荷位转移规律,进行水泥混凝土路面板底脱空对面板疲劳使用寿命的影响研究。研究结果表明:路面板角脱空后, 随着脱空区域的增大,最大应力位置由板纵边中部逐渐向板角区域转移,当脱空尺寸Lv>0??7m,板角脱空区与未脱空区边界(即三角形脱空区域的斜边)成为面板受力的最不利荷位,并建议脱空尺寸超过0??4m的路面板及时进行加固处治,以防止板块断裂。

关键词: 道路工程, 水泥混凝土路面, 脱空, 最不利荷位, 转移规律

CLC Number:

U416.216

ZENG Xiao-jun, ZENG Sheng, XU Jia, GONG Xian-bing. Metastatic?Pattern?of?the?Worst?Loading?Position?at?Slab?Corner?of??Cement?Concrete?Pavement?under?Voidage[J]. Journal of Chongqing Jiaotong University(Natural Science), 2009, 28(5): 865-869.

曾小军,曾??胜,许??佳,龚先兵. 水泥混凝土路面板角脱空状态下最不利荷位转移规律[J]. 重庆交通大学学报（自然科学版）, 2009, 28(5): 865-869.

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Metastatic?Pattern?of?the?Worst?Loading?Position?at?Slab?Corner?of??Cement?Concrete?Pavement?under?Voidage

水泥混凝土路面板角脱空状态下最不利荷位转移规律

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