水泥混凝土路面断板发生机理及预防
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摘要
断板问题一直是困扰水泥混凝土路面发展的主要问题。本文在全面系统地分析了水泥混凝土路面断板影响因素的基础上，通过现场试验分析，确定了导致断板率较高的最主要影响因素有如下几个方面：
1．切缝时间控制不当，切缝时间过晚；
2．水灰比控制不准确，超标准现象严重；
3．温度应力引起的断板；
4．养护方法不正确，洒水养生不及时。
并针对上述问题，通过试验分析及理论推倒提出了相应的预防措施与质量控制指标、现场控制方法。并通过试验路的实施获得了较好的效果。因此，将对改善我省白色路面的施工质量、降低断板率有着积极的指导意义。
同时，对断板后的维修处理方法也进行了系统的研究，根据断板的破坏程度，提出了相应的处理措施。对今后混凝土路面断板的修补会起到重要的指导作用。
In the paper the factors that may cause slab breaking of cement concrete pavement are analyzed thorougly and systematically. It is believed that slab breaking is closely related to material quality, material composition, concrete vibrating, curing, evironmental condition, joint sawing, construction competence and management of contractor and employer, and others. From analysing to in-situ experiments high slab breaking ratio is mainly caused by the following.
1. Sawing time is improperly controlled, sawing time being too late;
2. Water-cement ratio is inaccurately mntrolled, very serious in exceeding that as specified;
3. Slab breaking induced by thermal stress;
4. Incorrect curing methods are adopted. Curing with water spreading is not handled in time. With regard to the afore-mentioned problems, corresponding preventive measures, qulity control indices and site control approach are presented based on expeeriments and analysing worlx. Application in test roads has received prominent effects. The research work of this project is of great significance in actively improving the construction quality and decreasing the slab breaking ratio for cement concrete pavement construction in the province.
Furthermore considering that cement concrete pavement is developing rapidly in the province and that we are soon facing with remedial and mantenance problems, detailed study was also performed on remedial and maintenance methods for broken slabs. Mix design, construction method and techological procedure for fast-setting concrete are proposed. The research findings will act as a guidance for repairing broken slabs of cement concrete pavements in the province.
1．切缝时间控制不当，切缝时间过晚；
2．水灰比控制不准确，超标准现象严重；
3．温度应力引起的断板；
4．养护方法不正确，洒水养生不及时。
并针对上述问题，通过试验分析及理论推倒提出了相应的预防措施与质量控制指标、现场控制方法。并通过试验路的实施获得了较好的效果。因此，将对改善我省白色路面的施工质量、降低断板率有着积极的指导意义。
同时，对断板后的维修处理方法也进行了系统的研究，根据断板的破坏程度，提出了相应的处理措施。对今后混凝土路面断板的修补会起到重要的指导作用。
In the paper the factors that may cause slab breaking of cement concrete pavement are analyzed thorougly and systematically. It is believed that slab breaking is closely related to material quality, material composition, concrete vibrating, curing, evironmental condition, joint sawing, construction competence and management of contractor and employer, and others. From analysing to in-situ experiments high slab breaking ratio is mainly caused by the following.
1. Sawing time is improperly controlled, sawing time being too late;
2. Water-cement ratio is inaccurately mntrolled, very serious in exceeding that as specified;
3. Slab breaking induced by thermal stress;
4. Incorrect curing methods are adopted. Curing with water spreading is not handled in time. With regard to the afore-mentioned problems, corresponding preventive measures, qulity control indices and site control approach are presented based on expeeriments and analysing worlx. Application in test roads has received prominent effects. The research work of this project is of great significance in actively improving the construction quality and decreasing the slab breaking ratio for cement concrete pavement construction in the province.
Furthermore considering that cement concrete pavement is developing rapidly in the province and that we are soon facing with remedial and mantenance problems, detailed study was also performed on remedial and maintenance methods for broken slabs. Mix design, construction method and techological procedure for fast-setting concrete are proposed. The research findings will act as a guidance for repairing broken slabs of cement concrete pavements in the province.
引文
[1] 公路水泥混凝土路面设计规范，人民交通出版社，1994
[2] 李华等．水泥混凝土路面修补技术．人民交通出版社，1995．6
[3] 交通部公路科学研究所编．特种路面施工及验收技术规程．人民交通出版社，1997．
[4] 公路养护技术规范，人民交通出版社，1996
[5] 公路路基路面现场测试规程，人民交通出版社，1995
[6] 周德云、姚祖康，旧水泥混凝土路面上沥青加铺层结构的三维有限元分析，中国公路学报，1990
[7] 北京市政设计院，城市道路手册，中国建筑工业出版社，1985
[8] 胡长顺，水泥混凝土与沥青混凝土复合式路面结构设计理论与方法研究，西安公路学院青年基金课题研究报告，1994
[9] 王秉纲、胡长顺、李华，碾压水泥混凝土与沥青混凝土复合式路面修筑技术研究总报告，西安公路交通大学，1995
[10] Geotextile Specefications for Highway Appliction, FHWA, 1989
[11] 姚祖康，路面设计手册，人民交通出版社，1992
[12] 旧混凝土板的修补与表面功能恢复，西安公路学院，1987
[13] 我国水泥混凝土路面发展对策及修筑技术研究，交通部公路规划设计院，1991
[14] 胡长顺、曹东伟，有防裂夹层结构的旧水泥砼路面沥青加铺层力学分析，中圉公路学报，vol。12，1999
[15] 曹东伟，旧水泥砼路面沥青加铺层结构研究，西安公路交通大学硕士学位论文，1998
[16] 胡长顺、曹景民、曹东伟，旧水泥砼路面加铺沥青层修筑技术研究报告，西安公路交通大学，1999
[17] 曹东伟，胡长顺，水泥混凝土路面板底脱空判别方法研究，西安公路交通大学学报 Vol。18 1998 No．3
[18] 曹东伟，胡长顺，旧水泥混凝土路面沥青加铺层力学分析，西安公路交通大学学报，vol。21，2001，NO．1
[19] 胡长顺，曹东伟，刘悦等，土工织物在PCC—AC结构中应用的理论与实践，公路，no。9，2000
[20] 王秉纲，胡长顺等，河南省水泥混凝土路面维修技术研究，西安公路交通大学，1998．8
[21] 交通部公路科学研究所编．公路路基路面现场测试规程．人民交通出版社，1995．
[22] 张晖主编．公路与桥梁工程病害防治及检测修复实用技术大全．长春出版社，1999．
[23] 交通部公路科学研究所编．公路水泥混凝土路面滑模施工技术规程．人民交通出版社，2000．
[2] 李华等．水泥混凝土路面修补技术．人民交通出版社，1995．6
[3] 交通部公路科学研究所编．特种路面施工及验收技术规程．人民交通出版社，1997．
[4] 公路养护技术规范，人民交通出版社，1996
[5] 公路路基路面现场测试规程，人民交通出版社，1995
[6] 周德云、姚祖康，旧水泥混凝土路面上沥青加铺层结构的三维有限元分析，中国公路学报，1990
[7] 北京市政设计院，城市道路手册，中国建筑工业出版社，1985
[8] 胡长顺，水泥混凝土与沥青混凝土复合式路面结构设计理论与方法研究，西安公路学院青年基金课题研究报告，1994
[9] 王秉纲、胡长顺、李华，碾压水泥混凝土与沥青混凝土复合式路面修筑技术研究总报告，西安公路交通大学，1995
[10] Geotextile Specefications for Highway Appliction, FHWA, 1989
[11] 姚祖康，路面设计手册，人民交通出版社，1992
[12] 旧混凝土板的修补与表面功能恢复，西安公路学院，1987
[13] 我国水泥混凝土路面发展对策及修筑技术研究，交通部公路规划设计院，1991
[14] 胡长顺、曹东伟，有防裂夹层结构的旧水泥砼路面沥青加铺层力学分析，中圉公路学报，vol。12，1999
[15] 曹东伟，旧水泥砼路面沥青加铺层结构研究，西安公路交通大学硕士学位论文，1998
[16] 胡长顺、曹景民、曹东伟，旧水泥砼路面加铺沥青层修筑技术研究报告，西安公路交通大学，1999
[17] 曹东伟，胡长顺，水泥混凝土路面板底脱空判别方法研究，西安公路交通大学学报 Vol。18 1998 No．3
[18] 曹东伟，胡长顺，旧水泥混凝土路面沥青加铺层力学分析，西安公路交通大学学报，vol。21，2001，NO．1
[19] 胡长顺，曹东伟，刘悦等，土工织物在PCC—AC结构中应用的理论与实践，公路，no。9，2000
[20] 王秉纲，胡长顺等，河南省水泥混凝土路面维修技术研究，西安公路交通大学，1998．8
[21] 交通部公路科学研究所编．公路路基路面现场测试规程．人民交通出版社，1995．
[22] 张晖主编．公路与桥梁工程病害防治及检测修复实用技术大全．长春出版社，1999．
[23] 交通部公路科学研究所编．公路水泥混凝土路面滑模施工技术规程．人民交通出版社，2000．