成昆新线成峨段地下水化学特征及侵蚀性研究

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Abstract Research purposes: Whether groundwater of railway engineering is the erosion or not is directly related to the project investment，project durability and safety，and the groundwater erosive is closely related to its chemical characteristic. Most of sections of Chengdu-Kunming railway line are in the plains，underground water level is high，the underground structure is inevitable to contact with the ground water. Through the groundwater sample analysis andcorrosive test，its chemical characteristic，cause，distribution and erosion are found out.
Research conclusions:(1) Ca2+ , SO42-, HCO3 content is higher in groundwater, Mg2+ , K+, Na+ , Cl- content is lower.(2) Ca2+, SO42- and the high value area of mineralization are mainly distributed in the gypsum from the development of K 0+000~K 80+000 m section，PH level along the road towards the numerical distribution is uniform, the distribution of corrosive COZ content value is uneven and irregular.(3)K 0+000~K 0+080 m underground structure engineering should improve the ability of concrete sulfate attack resistance; The three sections of K 7+800- K9+500，K12+600~K13+500 and K 63+000~K 63+900 m should improve the ability of resistance to chlorine salt erosion; All underground structure engineering should improve acid erosion and erosion resistance ability of CO2 corrosion. (4)This research result can provide the reliable geological basis and protection measures for corrosion for the segment railway underground structure engineering，Also be used for similar engineering survey and design.

Key words： groundwater chemical characteristics corrosive new Chengdu-Kunming railway

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	Articles by authors
	ZHANG Ying
	LI Dong
	ZHANG Hong
	LEI Tong-wen

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ZHANG Ying,LI Dong,ZHANG Hong, et al. Study on Groundwater Chemical Characteristics and Erosion in Chengdu-Emei Section of Chengdu-Kunming Railway Line [J]. 铁道工程学报, 2015, 32(6): 20-24.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2015/V32/I6/20

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