水泥混凝土路面板脱空评定及压浆技术研究
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摘要
水泥混凝土路面板下脱空评定的关键是区分接缝传荷不足与脱空分别对弯沉产生的影响，单一利用弯沉指标来评定脱空状况是不完全切合实际的。本文以新建立的接缝力学模型为基础，通过对第一传荷状态临界荷载及其对应弯沉影响因素的分析指出，脱空对弯沉的影响是显著的，进而提出了以第一传荷状态临界荷载与对应弯沉为指标的脱空评定模型与评定方法，使评定工作在单板系统基础上进行，排除了接缝传荷状况不确定的影响。作者给出了脱空尺寸与弯沉典型回归关系式，从而能够利用FWD对水泥混凝土路面板下脱空进行快速评定。
本文研制了专用压浆材料，采用水泥、砂、粉煤灰、外加剂和水混拌而成，通过大量实验配制出的浆液具有自流淌密实性好、早期强度高、无离析、无泌水、无收缩的性能，特别是针对路面唧泥处理或预防性养护，板底脱空量较小，研制出高流动度材料，能满足压浆施工的需要。最后，本文通过施工经验总结出压浆工艺流程及质量保证措施，实践结果表明压浆效果良好。
The crux of void detection is how to discern the influence caused by indefinite load-transfer capacity and void separately on deflection. It is apparent that only using deflection as the criterion to detect void is impractical. Based on the new formed joint model, a variety of influential factors on First Limitation Load of Load-transfer Condition and Correlated Deflection are discussed. The result shows that the influence on deflection caused by void is noticeable. Then, a model and a method for void detection, which use First Limitation Load of Load-transfer Condition and Correlated Deflection-not single deflection-as their criteria, are proposed. This model makes void detection based on single PCC pavement system and eliminates the influence caused by indefinite load-transfer capacity. The typical relationship between void and deflection is given, which makes it possible to apply FWD to quick void detection.
The author excogitated a kind of appropriative mud jacking material which is made up of cement, sand, fly ash, admixture and water. This material which was developed on the basis of large amount of tests has the proprieties of good self-flowing density, high earlier strength,non-segregation, non-weepage and non-contractility. Especially, the author aim at dealing with pumping mud and earlier maintained developed a kind of high flow grade material which can meet the requirement of mud jacking. At the final part of this paper, its construction technology had been developed. Practice results testified that the squeezing effect is good.
本文研制了专用压浆材料，采用水泥、砂、粉煤灰、外加剂和水混拌而成，通过大量实验配制出的浆液具有自流淌密实性好、早期强度高、无离析、无泌水、无收缩的性能，特别是针对路面唧泥处理或预防性养护，板底脱空量较小，研制出高流动度材料，能满足压浆施工的需要。最后，本文通过施工经验总结出压浆工艺流程及质量保证措施，实践结果表明压浆效果良好。
The crux of void detection is how to discern the influence caused by indefinite load-transfer capacity and void separately on deflection. It is apparent that only using deflection as the criterion to detect void is impractical. Based on the new formed joint model, a variety of influential factors on First Limitation Load of Load-transfer Condition and Correlated Deflection are discussed. The result shows that the influence on deflection caused by void is noticeable. Then, a model and a method for void detection, which use First Limitation Load of Load-transfer Condition and Correlated Deflection-not single deflection-as their criteria, are proposed. This model makes void detection based on single PCC pavement system and eliminates the influence caused by indefinite load-transfer capacity. The typical relationship between void and deflection is given, which makes it possible to apply FWD to quick void detection.
The author excogitated a kind of appropriative mud jacking material which is made up of cement, sand, fly ash, admixture and water. This material which was developed on the basis of large amount of tests has the proprieties of good self-flowing density, high earlier strength,non-segregation, non-weepage and non-contractility. Especially, the author aim at dealing with pumping mud and earlier maintained developed a kind of high flow grade material which can meet the requirement of mud jacking. At the final part of this paper, its construction technology had been developed. Practice results testified that the squeezing effect is good.
引文
1. Wu, s-s. Concrete Slabs Stabilized by Subsealing: A Performance Report. Transportation Research Record, Transportation Research Board No.1307, 1991
2. Federal Highway Administration. Evaluation On Rigid Pavement Overlay Design Procedures. Report No.FHWA/RD-83/090
3. M.I.Darter et al, Joint Repair Methods for Portland Cement Pavements .NCHRP Report 281 (1985)
4. M.Y.Shahin. Use of The FWD for the Non-destructive Deflection Testing of Jointed Concrete Airfield Pavements. Third International conference on Concrete Pavement Design and Rehabilitation, April 23-25, 1985, Purdue University
5. L.Traris Chapin and Thomas D.White. Validating Loss of Support for Concrete Pavements, Fitth International conference on Concrete Pavement Design and Rehabilitation
6. Elmer C.Hansen, Roy Johnnesen, and Jamshid M.Armaghani. Field Effects of Water Pumping Beneath Concrete Pavement Slabs. Journal of Transportation Engineering, Vol.117, No.6, Nov.1991
7. J.M.Lybas et al. Evaluation of A concrete Test Pavement Using The FWD and WESLIQUID. Third International conference on Concrete Pavement Design and Rehabilitation, April 23-25, 1985, Purdue University
8．唐伯明．路面结构状况的评价与分析．东南大学博士论文，1990．4
9．邓学钧，陈荣生．刚性路面设计．人民交通出版社，1990
10. Yang H.Huang and Xue-Jun Deng. Finite Element Analysis of Jointed Concrete Pavements. Journal of Transportation Engineering, Vol.109, No.5, September. 1983
11. Hua Guo, James A.Sherwood and Mark B.Shyder, Component Dowel-Bar Model for Load-Transfer System in PCC Pavements. Journal of Transportation Engineering, Vol.121, NO.3, May,1993.
12．傅立平．混凝土路面接缝传荷能力的有限元分析．同济大学硕士论文，1987．4
13. LESLIS W.TELLER Performance of Doweled Joints Under Repetitive Loading. PUBLIC ROADS, Vol.30, NO.1, April. 1958
14．赵佳军．水泥混凝土路面接缝性能研究．东南大学硕士论文，1991．11
15．公路水泥混凝土路面设计规范．中华人民共和国交通部．1994，北京
16．交通部水泥混凝土路面推广组．水泥混凝土路面研究．人民交通出版社．1995．11
17．公路路基路面现场测试规程．中华人民共和国交通部．1994，北京
18. P.Ullidtz and R.N.Stubstad, Structural Evaluation of Highway and Airfield PCC Pavements Using The Falling Weight Deflectometer, Third International conference on Concrete Pavement Design and Rehabilitation, April 23-25, 1985, Purdue University
19. Y.T.Chou, Subgrade Contact Pressure Under Rigid Pavements, T.E.1983, Vol.109, No.3
20．李华，缪昌文，金志强。水泥混凝土路面修补技术。人民交通出版社，1995．10
21．周德云，姚祖康．水泥混凝土路面接缝传荷能力的分析．同济大学学报，Vol．21，No．1，1993．3
22. Yu T. Chou. Comparative Analysis of Rigid Pavements, T.E. Vol.109, No.5, Sept.1983
23．钱国超．水泥混凝土路面板角荷载应力的有限元分析．南京工学院硕士论文，1985
24．公路养护技术规范JTJ073－96中华人民共和国交通部．1996，北
京
25．公路水泥混凝土路面养护技术规范JTJ073－96中华人民共和国交通部．2001，北京
26．工程材料．人民交通出版社．长安大学主编．2001
27．李林．水泥混凝土路面板底压浆工艺初探．河南交通科技，1997，5
28．吴中堂．水泥混凝土路面板底压浆技术应用．公路，1997，6
2. Federal Highway Administration. Evaluation On Rigid Pavement Overlay Design Procedures. Report No.FHWA/RD-83/090
3. M.I.Darter et al, Joint Repair Methods for Portland Cement Pavements .NCHRP Report 281 (1985)
4. M.Y.Shahin. Use of The FWD for the Non-destructive Deflection Testing of Jointed Concrete Airfield Pavements. Third International conference on Concrete Pavement Design and Rehabilitation, April 23-25, 1985, Purdue University
5. L.Traris Chapin and Thomas D.White. Validating Loss of Support for Concrete Pavements, Fitth International conference on Concrete Pavement Design and Rehabilitation
6. Elmer C.Hansen, Roy Johnnesen, and Jamshid M.Armaghani. Field Effects of Water Pumping Beneath Concrete Pavement Slabs. Journal of Transportation Engineering, Vol.117, No.6, Nov.1991
7. J.M.Lybas et al. Evaluation of A concrete Test Pavement Using The FWD and WESLIQUID. Third International conference on Concrete Pavement Design and Rehabilitation, April 23-25, 1985, Purdue University
8．唐伯明．路面结构状况的评价与分析．东南大学博士论文，1990．4
9．邓学钧，陈荣生．刚性路面设计．人民交通出版社，1990
10. Yang H.Huang and Xue-Jun Deng. Finite Element Analysis of Jointed Concrete Pavements. Journal of Transportation Engineering, Vol.109, No.5, September. 1983
11. Hua Guo, James A.Sherwood and Mark B.Shyder, Component Dowel-Bar Model for Load-Transfer System in PCC Pavements. Journal of Transportation Engineering, Vol.121, NO.3, May,1993.
12．傅立平．混凝土路面接缝传荷能力的有限元分析．同济大学硕士论文，1987．4
13. LESLIS W.TELLER Performance of Doweled Joints Under Repetitive Loading. PUBLIC ROADS, Vol.30, NO.1, April. 1958
14．赵佳军．水泥混凝土路面接缝性能研究．东南大学硕士论文，1991．11
15．公路水泥混凝土路面设计规范．中华人民共和国交通部．1994，北京
16．交通部水泥混凝土路面推广组．水泥混凝土路面研究．人民交通出版社．1995．11
17．公路路基路面现场测试规程．中华人民共和国交通部．1994，北京
18. P.Ullidtz and R.N.Stubstad, Structural Evaluation of Highway and Airfield PCC Pavements Using The Falling Weight Deflectometer, Third International conference on Concrete Pavement Design and Rehabilitation, April 23-25, 1985, Purdue University
19. Y.T.Chou, Subgrade Contact Pressure Under Rigid Pavements, T.E.1983, Vol.109, No.3
20．李华，缪昌文，金志强。水泥混凝土路面修补技术。人民交通出版社，1995．10
21．周德云，姚祖康．水泥混凝土路面接缝传荷能力的分析．同济大学学报，Vol．21，No．1，1993．3
22. Yu T. Chou. Comparative Analysis of Rigid Pavements, T.E. Vol.109, No.5, Sept.1983
23．钱国超．水泥混凝土路面板角荷载应力的有限元分析．南京工学院硕士论文，1985
24．公路养护技术规范JTJ073－96中华人民共和国交通部．1996，北
京
25．公路水泥混凝土路面养护技术规范JTJ073－96中华人民共和国交通部．2001，北京
26．工程材料．人民交通出版社．长安大学主编．2001
27．李林．水泥混凝土路面板底压浆工艺初探．河南交通科技，1997，5
28．吴中堂．水泥混凝土路面板底压浆技术应用．公路，1997，6