Abstract：Research purposes：At present，the construction of cement soil pile along incline direction is an effective means of strengthening the existing railway embankment．Because the cement soil piles mainly bear bending force，and the cement soil pile usually occurs some cracks in subgrade’s body to influence the reinforcement effects of the roadbed when the bending stress of cement soil pile at its bottom exceeds the tensile strength of cement，SO the double T-steel or steel pipe is used to be a reinforced material to the cement soil pile．Therefore，it is very significant that preferred materials should be determined in soil-cement piles before their construction．
Research conclusions：(1)The paper shows US that the main function of cement soil piles is subjected to bend loads， and the bending rigidity of pile will increase when reinforced bar is used．(2)The test results which used large scale model show that the use of reinforced cement soil pile can increase the whole bending rigidity greatly compared with concrete pile．(3)The cement soil pile reinforced by double T—steel at the lower part of section is proved that it is more excellent for its characteristics and more suitable for strengthening subgrade by using cement soil pile．(4)The integrity and uniformity of soil—cement piles is very important to flexural rigidity，some guaranteed measures should be made in construction stage．(5)Research finding can be used in strengthened design and construction of working railway bed．
宋绪国,董捷,张志民,郭世周,刘晶磊. 加筋水泥土桩承载特性试验研究[J]. 铁道工程学报, 2013, 30(12): 23-28.
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2013, Vol. 30 
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