公路交通科技
公路交通科技
공로교통과기
JOURNAL OF HIGHWAY AND TRANSPORTATION RESEARCH AND DEVELOPMENT
2010年
2期
26-29,35
,共5页
道路工程%振动板%振动力学%水泥混凝土%传力杆插入%滑模摊铺
道路工程%振動闆%振動力學%水泥混凝土%傳力桿插入%滑模攤鋪
도로공정%진동판%진동역학%수니혼응토%전력간삽입%활모탄포
road engineering%vibrating plate%vibration mechanics%cement concrete%DBI%slipform paving
为修复水泥混凝土路面DBI施工对接缝部位混凝土产生的扰动破坏,在滑模摊铺机后部增设两块振动平板进行补振.根据振动传播理论,为保证混凝土中粗集料获得最佳振动,提出选用2 300~3 000次/min的振动频率.按有效振动液化原理提出了振动颗粒极限振幅的确定方法.从有效振动深度等边界条件提出振动电机偏心矩的确定方法.结合广东省粤赣高速公路某标段滑模摊铺施工,进行了振动板的实例设计,工程应用表明,振动板能有效消除接缝部位混凝土的缺陷,传力杆牢固可靠;路面平整度显著提高,平整度合格率达到91%以上,比没有加装振动板的标段高23%.
為脩複水泥混凝土路麵DBI施工對接縫部位混凝土產生的擾動破壞,在滑模攤鋪機後部增設兩塊振動平闆進行補振.根據振動傳播理論,為保證混凝土中粗集料穫得最佳振動,提齣選用2 300~3 000次/min的振動頻率.按有效振動液化原理提齣瞭振動顆粒極限振幅的確定方法.從有效振動深度等邊界條件提齣振動電機偏心矩的確定方法.結閤廣東省粵贛高速公路某標段滑模攤鋪施工,進行瞭振動闆的實例設計,工程應用錶明,振動闆能有效消除接縫部位混凝土的缺陷,傳力桿牢固可靠;路麵平整度顯著提高,平整度閤格率達到91%以上,比沒有加裝振動闆的標段高23%.
위수복수니혼응토로면DBI시공대접봉부위혼응토산생적우동파배,재활모탄포궤후부증설량괴진동평판진행보진.근거진동전파이론,위보증혼응토중조집료획득최가진동,제출선용2 300~3 000차/min적진동빈솔.안유효진동액화원리제출료진동과립겁한진폭적학정방법.종유효진동심도등변계조건제출진동전궤편심구적학정방법.결합광동성월공고속공로모표단활모탄포시공,진행료진동판적실례설계,공정응용표명,진동판능유효소제접봉부위혼응토적결함,전력간뢰고가고;로면평정도현저제고,평정도합격솔체도91%이상,비몰유가장진동판적표단고23%.
Two vibrating plates were attached to the rear of slipform paver to remedy the defects during the dowel bar insert (DBI) construction of cement concrete pavement.According to the vibration propagation theory,a suitable frequency of 2 200~ 3 000 rpm was selected to ensure the best vibration of coarse aggregate.The limit amplitude of aggregate was determined by the principle of effective vibrating liquefaction.The selection of motor' s eccentric moment was proposed based on the boundary condition such as vibrating depth.A case-based design of vibrating plate was conducted in a certain contract section of Guangdong-Jiangxi expressway using the slipform paving construction method.The practical case shows that vibrating plate could perfectly remedy the defects of concrete in the joint area with reliable dowel bar working and improve the pavements smoothness to the qualified rate of 91% which is 23% higher than that of the contract section without vibrating plates.