新疆硫酸盐渍土地区沥青路面鼓胀变形机理研究

冯瑞玲; 王随柱; 吴立坚; 陆奂材; 沈宇鹏

doi:10.11779/CJGE202109020

新疆硫酸盐渍土地区沥青路面鼓胀变形机理研究 English Version

冯瑞玲^{1, 2,},
王随柱³,
吴立坚⁴,
陆奂材¹,
沈宇鹏^{1, 2}

1.
北京交通大学土木建筑工程学院,北京　100044
2.
北京市轨道交通线路安全与防灾工程技术研究中心,北京　100044
3.
新疆生产建设兵团公路科学技术研究所,新疆　乌鲁木齐830000
4.
交通运输部公路科学研究院,北京　100088

基金项目:

国家自然科学基金面上项目 51778048

详细信息

作者简介:
冯瑞玲(1976— ),女,副教授,主要从事岩土工程、路基工程等方面的教学和科研工作。E-mail：rlfeng@bjtu.edu.cn

中图分类号: TU411.08
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出版历程
- 收稿日期: 2020-12-29
- 网络出版日期: 2022-12-02
- 刊出日期: 2021-08-31

Bulging deformation mechanism of asphalt pavement in sulfate saline soil areas of Xinjiang

1.
College of Civil and Architecture Engineering, Beijing Jiaotong University, Beijing 100044, China
2.
Beijing Engineering Research Center of Rail Transit Safety and Disaster Prevention, Beijing 100044, China
3.
Institute of Highway Science and Technology, Xinjiang Production and Construction Corps, Urumqi 830000, China
4.
Research Institute of Highway (RIOH), Ministry of Transport, Beijing 100088, China

摘要

摘要: 依托新疆阿克苏地区的两条公路,在进行公路路面鼓胀病害调查的基础上,选择4个典型病害部位开挖试坑,观察了路面结构层中损坏的情况,同时取样测试了基层及路基填料的含盐量、矿物成分、pH值等,分析了两条公路路面鼓胀病害的产生机理。研究结果表明：公路A（省道）路面基层中的离子以 ${SO}_{4}^{2 -}$ ${SO}_{4}^{2 -}$ 、 ${Ca}_{}^{2+}$ ${Ca}_{}^{2+}$ 为主,因此发生了钙矾石型硫酸盐侵蚀。公路B（国道）路面基层中 ${Ca}_{}^{2+}$ ${Ca}_{}^{2+}$ 含量较高,同时含有一定量 ${SO}_{4}^{2 -}$ ${SO}_{4}^{2 -}$ 和 ${CO}_{3}^{2 -}$ ${CO}_{3}^{2 -}$ ,因此发生了硅灰石膏型硫酸盐侵蚀。此外,夏季高温条件、水泥中碱含量超标等都加剧了两种硫酸盐侵蚀的发生。最后,根据两条公路病害产生机理,提出了硫酸盐渍土地区路面鼓胀病害的预防措施。
- 硫酸盐渍土 /
- 沥青路面 /
- 半刚性基层 /
- 鼓胀变形 /
- 硫酸盐侵蚀
Abstract: Based on two highways in Aksu prefecture of Xinjiang, four typical diseased sections are selected to excavate test pits on the basis of investigating bulging diseases of highways, the damage of structure layer pavement is observed, the salt content, mineral composition and pH value of base and subgrade fill are sampled and tested, and the mechanism of pavement diseases of the two highways is analyzed. The results show that the ions in the base course of Highway A (Provincial Highway) are mainly ${SO}_{4}^{2 -}$ ${SO}_{4}^{2 -}$ and ${Ca}_{}^{2+}$ ${Ca}_{}^{2+}$ , so a chemical reaction takes place and Ettringite is formed. The content of ${Ca}_{}^{2+}$ ${Ca}_{}^{2+}$ in the base course of Highway B (National Highway) is high, and it also contains a certain amount of ${SO}_{4}^{2 -}$ ${SO}_{4}^{2 -}$ and ${CO}_{3}^{2 -}$ ${CO}_{3}^{2 -}$ , so a chemical reaction takes place and Wollastonite gypsum is formed. In addition, the high temperature in summer and the alkali content in cement exceed the standard, accelerate the occurrence of two kinds of sulfate erosion. Finally, according to the mechanism of the two highway diseases, the preventive measures for bulging diseases of highways in the sulfate saline soil areas are put forward.
- sulphate saline soil /
- asphalt pavement /
- semi-rigid base /
- bulging deformation /
- sulfate attack

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图 1 路面鼓胀变形

Figure 1. Deformation and swelling of pavement

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图 2 公路A（省道）K20+150断面

Figure 2. Cross-section in K20+150 of Highway A (Provincial Highway)

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图 3 公路A（省道）K17+330断面开裂部位路肩开挖取样

Figure 3. Cross-section in K17+330 of Highway A (Provincial Highway)

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图 4 公路B（国道）试坑开挖情况

Figure 4. Cross-section of Highway B (National Highway)

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图 5 试坑中基层骨料

Figure 5. Base aggregates in test pits of highways

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图 6 公路A取样位置示意图

（图中□表示取样完成了含盐量、XRD、pH值测试；△表示取样完成了含盐量测试）

Figure 6. Schematic diagram of sampling location of Highway A

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图 7 公路B取样位置示意图

（图中□表示取样完成了含盐量、XRD、pH值测试；△表示取样完成了含盐量测试）

Figure 7. Schematic diagram of sampling location of Highway B

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图 8 公路A病害部位测试结果

Figure 8. Test results of diseased parts of Highway A

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图 9 公路B病害部位测试结果

Figure 9. Test results of diseased parts of Highway B

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图 10 公路A（省道）试坑中盐分离子种类及含量

Figure 10. Types and contents of salt separators in Highway A (Provincial Highway) test pit

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图 11 公路B（国道）试坑中盐分离子种类及含量

Figure 11. Types and contents of salt separators in test pit of Highway B (National Highway)

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表 1 公路A病害部位含盐量测试结果

Table 1 Test results of salt content in diseased parts of Highway A

取样位置	试样编号	${Cl}^{-}$ ${Cl}^{-}$ / ${SO}_{4}^{2 -}$ ${SO}_{4}^{2 -}$	含盐量/%	盐渍土名称
K20+150	1	0.018	1.002	硫酸盐中盐渍土
	2	0.038	0.677	硫酸盐中盐渍土
	3	0.048	0.709	硫酸盐中盐渍土
	4	0.103	0.383	硫酸盐中盐渍土
	Y1	0.090	0.428	硫酸盐中盐渍土
	Y2	0.035	0.355	硫酸盐中盐渍土
	Y3	0.061	0.588	硫酸盐中盐渍土
K17+330	5	0.201	1.705	硫酸盐中盐渍土
	Y4	0.101	2.041	硫酸盐强盐渍土
	Y5	0.067	0.717	硫酸盐中盐渍土
	Y6	0.068	1.447	硫酸盐中盐渍土

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表 2 公路B病害部位含盐量测试结果

Table 2 Test results of salt content in diseased parts of Highway B

取样位置	试样编号	${Cl}^{-}$ ${Cl}^{-}$ / ${SO}_{4}^{2 -}$ ${SO}_{4}^{2 -}$	含盐量/%	盐渍土名称
K45+500	6	0.670	1.614	亚硫酸盐中盐渍土
	7	0.407	1.533	亚硫酸盐中盐渍土
	8	0.111	0.570	硫酸盐中盐渍土
	Y7	0.416	2.827	亚硫酸盐强盐渍土
	Y8	0.444	2.635	亚硫酸盐强盐渍土
	Y9	11.417	2.637	氯盐中盐渍土
	Y10	0.095	0.568	硫酸盐中盐渍土
	坡脚外原状土	0.181	7.838	硫酸盐过盐渍土
K36+210	10	0.262	1.352	硫酸盐中盐渍土
	11	0.209	1.806	硫酸盐中盐渍土
	13	0.518	0.135	亚硫酸盐非盐渍土
	Y11	0.475	0.184	亚硫酸盐非盐渍土

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