沥青路面半刚性基层材料路用性能研究
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摘要
半刚性路面的承重能力取决于半刚性基层和半刚性底基层的强度和厚度,这两个结构层是半刚性沥青路面的关键层次,它就象结构物的基础,基层质量的好坏直接影响着整个路面的质量,对路面的使用质量和使用寿命都有十分重要的影响。经过十几年的设计施工实践,河北省已经形成几种常见的无机结合料稳定碎石混合料基层结构。京张二级汽车专用公路为河北省最早施工的高等级公路,当时采用的是石灰水泥稳定碎石,该种结构具有良好的水稳性、板体性及抗温度变形能力且水泥用量较少,后期强度高,但施工要求按水泥碎石施工,即水泥终凝前要完成全部碾压。从京石高速公路开始,逐渐被二灰(石灰粉煤灰)稳定碎石代替,二灰级配碎石具有较好的水稳性,板体性和抗裂性,尤其随着龄期的增长强度增长很快,并且在施工过程中不受时间的限制,因此一开始使用,倍受人们青睐。河北省的高速公路将二灰碎石用在基层的下层,并且掺加部分水泥,基层的上层采用水泥稳定碎石。水泥稳定碎石的强度较高,并且强度、刚度、水稳性及抗冲刷能力较好,并且随着施工机械和施工水平的提高,目前完全可以达到其施工的要求。
由于河北省石灰岩石料料源丰富,基层的骨料多采用石灰岩石料,但是在一些山区和山前区,天然砂砾储量较大,并且级配良好,如经试验验证其路用性能较好,也不失为一种良好的基层材料来源。本着基层材料的选择应根据经济适用的原则,就地取材,择优取材,从料源、施工技术、经济等方面综合考虑,因地制宜的确定不同地区的基层结构类型。
The load bearing capability of semi-rigidity pavement is dependent on the strength and thickness of semi-rigidity base and subbase. These two structure layers are the key layer of the semi-rigidity asphalt pavement , the quality of the road base affect directly the whole pavement and have very important affection on the usage quality and service lifes of the pavement.Through more than ten years of the design construction fulfillment, Hebei province has already become a few familiar roadbase structure by inorganic binder stability crushstone mixture.The Jingzhang second highway is Hebei at the earliest stage construction of high grade highway, what to adopt was the lime cement at that time cement stability crushed stones.This structure have the favorable water stability,the plank body and anti- temperature deformability.It need less cement content,and have high intensity on late stage, but the construction request to construct according to cement crushed stones, namely to complete all grinding the cement final set.From Jingshi highway ,it gradually replace by two ash(the lime and fly ash). lime-flyash graded broken stone has the better water stability, the plank body and crack resistance.especially along with the age growth ,the strength increase very quickly, and be free from the restriction of time during the period of construction. The highway of Hebei province use lime-flyash graded broken stone in the bottom layer of the roadbase, and add some cements.the upper level of roadbase adopt cement stability crushed stones.The cement stability crushed stones have higer strength and stiffness,the water stability and anti-erosion is better. Along with enhance of construction machine and construction level, currently we can attain its construction request completely.
Because lime rock in Hebei province is abundant, the aggregate of the roadbase adopt usually the lime rock.But in some mountain areas and before the mountain, the natural gravel keeps quantity to compare greatly, and the gradation is good.So through experiment to verify its road use performance, it also is a kind of good roadbase material source.The selection of base material should accord economy principle,we should comprehensive consider use local materials,alternative optimum, material source ,construction technique, economy etc.We should determine roadbase structure type in different area adjust measures to local conditions.
由于河北省石灰岩石料料源丰富,基层的骨料多采用石灰岩石料,但是在一些山区和山前区,天然砂砾储量较大,并且级配良好,如经试验验证其路用性能较好,也不失为一种良好的基层材料来源。本着基层材料的选择应根据经济适用的原则,就地取材,择优取材,从料源、施工技术、经济等方面综合考虑,因地制宜的确定不同地区的基层结构类型。
The load bearing capability of semi-rigidity pavement is dependent on the strength and thickness of semi-rigidity base and subbase. These two structure layers are the key layer of the semi-rigidity asphalt pavement , the quality of the road base affect directly the whole pavement and have very important affection on the usage quality and service lifes of the pavement.Through more than ten years of the design construction fulfillment, Hebei province has already become a few familiar roadbase structure by inorganic binder stability crushstone mixture.The Jingzhang second highway is Hebei at the earliest stage construction of high grade highway, what to adopt was the lime cement at that time cement stability crushed stones.This structure have the favorable water stability,the plank body and anti- temperature deformability.It need less cement content,and have high intensity on late stage, but the construction request to construct according to cement crushed stones, namely to complete all grinding the cement final set.From Jingshi highway ,it gradually replace by two ash(the lime and fly ash). lime-flyash graded broken stone has the better water stability, the plank body and crack resistance.especially along with the age growth ,the strength increase very quickly, and be free from the restriction of time during the period of construction. The highway of Hebei province use lime-flyash graded broken stone in the bottom layer of the roadbase, and add some cements.the upper level of roadbase adopt cement stability crushed stones.The cement stability crushed stones have higer strength and stiffness,the water stability and anti-erosion is better. Along with enhance of construction machine and construction level, currently we can attain its construction request completely.
Because lime rock in Hebei province is abundant, the aggregate of the roadbase adopt usually the lime rock.But in some mountain areas and before the mountain, the natural gravel keeps quantity to compare greatly, and the gradation is good.So through experiment to verify its road use performance, it also is a kind of good roadbase material source.The selection of base material should accord economy principle,we should comprehensive consider use local materials,alternative optimum, material source ,construction technique, economy etc.We should determine roadbase structure type in different area adjust measures to local conditions.
引文
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[25] 赖正汉.浅析混凝土的配合比与强度.山西建筑,2004,(9).
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[2] 龚晓南等,地基处理手册.中国建筑工业出版社,2001.6
[3] 高大钊,岩土工程的回顾与前瞻.人民交通出版社,2001.8
[4] 梁乃兴,申爱琴.工程材料.人民交通出版社,1999.11
[5] 杨伟量.地基基础工程监理指南.上海科学技术出版社,1999.11
[6] 沙庆林.高等级公路半刚性基层沥青路面.人民交通出版社,1999.8
[7] 沙爱民,胡力群.半刚性基层材料抗冲刷性能试验方法研究.中国公路学报,2002,(2).
[8] 张敏江,关贺,梁鸿颉,.半刚性基层材料抗冲刷性能的研究.沈阳建筑大学学报(自然科学版),2006,(3).
[9] 安博生.二灰碎石基层抗冲刷性能试验方法研究.石油工程建设,2005,(4).
[10] 荆淑梅.无机结合料基层现场强度检测初探.山西交通科技,2005,(3).
[11] 刘清芳,蒋甫,应荣华.水泥稳定碎石半刚性基层材料的抗裂性能分析.中南公路工程,2004,(2).
[12] 黄博彦,陈少幸,张肖宁.水泥稳定碎石基层施工及质量控制.广东公路交通,2004,(S1).
[13] 周岳华,刘欣.水泥稳定碎石基层施工工艺与质量控制.公路,2004,(11).
[14] 黄维蓉,陈凯,何兆益,冉龙飞.二灰稳定煤矸石路用性能研究.重庆交通学院学报,2005,(5).
[15] 李晓明,刘元烈,石飞荣.半刚性基层沥青混凝土路面养护技术研究.公路,2002,(12).
[16] 陆文学,陈崇驹,丛林.半刚性基层养护期干缩开裂发展过程的分析.公路,2002,(12).
[17] 王加龙,何兆益,黄维蓉.无机结合料和固化剂稳定粉土收缩性能研究.重庆交通学院学报,2005,(2).
[18] 王宏畅,黄晓明,傅智.半刚性基层材料路用性能的试验研究.公路交通科技,2005,(11).
[19] 郝白龙,.水泥稳定碎石基层裂缝的防治.公路交通技术,2006,(3).
[20] 刘昆,王维华.半刚性基层集料含量的确定.内蒙古公路与运输,1997,(4).45%
[21] 王德利,马延明,杨尚平.公路沥青面层集料生产中存在的质量控制问题.北京地质,2005,(1).
[22] 国莉,苑红凯,史超.半刚性基层沥青路面与长寿命沥青路面比较分析.交通标准化,2005,(10).
[23] 朱云升,郭忠印,陈崇驹,温珀玮,齐武生,.半刚性基层材料干缩和温缩特性试验研究.公路,2006,(2).
[24] 袁登琼,张东长.渝长高速公路二灰碎石混合料抗冲刷试验方法的探讨.公路交通技术,2002,(2).
[25] 赖正汉.浅析混凝土的配合比与强度.山西建筑,2004,(9).
[26] 张宏刚,崔长宇,刘长辉.半刚性基层设计及施工中应注意到的技术问题.辽宁交通科技,2004,(7).
[27] 程新春,章志明.半刚性基层二灰稳定碎石结构应用研究.公路与汽运,2004,(6).
[28] 王保龙,李迎春,钱春香.二灰碎石基层材料防冻剂及防冻机理研究.东南大学学报(自然科学版),2001,(4).
[29] 孙德栋,秦玉层.提高二灰碎石早期强度试验研究.公路,2001,(9).
[30] 邓学钧,路基路面工程.人民交通出版社,2000
[31] 交通部公路科学研究所,公路路基路面现场测试规程.人民交通出版社,1995
[32] 张留俊,高速公路软土地基处理技术 试验研究与工程实例.人民交通出版社,2002
[33] 殷永高,屠筱北,公路地基处理,人民交通出版社,2002