公路交通技术
公路交通技術
공로교통기술
TECHNOLOGY OF HIGHWAY AND TRANSPORT
2014年
4期
19-23
,共5页
旧水泥路面%沥青加铺层%力学计算%影响因素
舊水泥路麵%瀝青加鋪層%力學計算%影響因素
구수니로면%력청가포층%역학계산%영향인소
old cement pavement%asphalt overlay%mechanical calculation%influence factors
为了分析旧水泥路面沥青加铺层的应力分布情况,采用三维有限元力学计算方法,分析加铺层模量、旧水泥混凝土板的有关参数以及基础条件对加铺层应力的影响。由计算可知,在一定程度内,加铺层模量的增大有助于减弱荷载造成的损害;适当增大接缝宽度,提高基层和土基的模量及有效处治板底脱空,可以减小沥青加铺层内的应力,延缓或防止反射裂缝发展。
為瞭分析舊水泥路麵瀝青加鋪層的應力分佈情況,採用三維有限元力學計算方法,分析加鋪層模量、舊水泥混凝土闆的有關參數以及基礎條件對加鋪層應力的影響。由計算可知,在一定程度內,加鋪層模量的增大有助于減弱荷載造成的損害;適噹增大接縫寬度,提高基層和土基的模量及有效處治闆底脫空,可以減小瀝青加鋪層內的應力,延緩或防止反射裂縫髮展。
위료분석구수니로면력청가포층적응력분포정황,채용삼유유한원역학계산방법,분석가포층모량、구수니혼응토판적유관삼수이급기출조건대가포층응력적영향。유계산가지,재일정정도내,가포층모량적증대유조우감약하재조성적손해;괄당증대접봉관도,제고기층화토기적모량급유효처치판저탈공,가이감소력청가포층내적응력,연완혹방지반사렬봉발전。
In order to analyze stress distribution of asphalt overlay on old cement concrete pavement, this paper analyzes the modulus of overlay, relevant parameters of old cement concrete slabs and influences of foundation conditions on stress of overlay by means of 3D finite element mechanical calculation method. Based on calculation, increase of the modulus of overlay is helpful for reducing damages caused by loads to a certain extent; appropriate enlargement of joint width, increase of the modulus of base course and subgrade and effective treatment of voids beneath concrete slabs can reduce the stress in asphalt overlay and postpone or prevent development of reflective cracks.