李晓刚,高波,赵育飞. 冻土单轴抗压试验研究及盾构始发冻结优化设计[J]. 科学技术与工程, 2020, 20(27): 11259-11265.
LI Xiao-gang,高波,赵育飞.Study on Uniaxial Compression Test of Frozen Soil and Optimization Design of Shield Starting Freezing[J].Science Technology and Engineering,2020,20(27):11259-11265. |
| 冻土单轴抗压试验研究及盾构始发冻结优化设计 |
| Study on Uniaxial Compression Test of Frozen Soil and Optimization Design of Shield Starting Freezing |
| 投稿时间：2020-01-01 修订日期：2020-05-07 |
| DOI： |
| 中文关键词: 盾构始发 人工冻土 单轴抗压试验 优化设计 正交试验 |
| 英文关键词:shield launching artificial frozen soil uniaxial compression test optimal design orthogonal test |
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| 摘要点击次数: 169 |
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| 中文摘要: |
| 为保证浅埋深富水软弱地层的盾构隧道安全始发,采用人工冻结法进行端头加固。通过在室内进行冻土单轴抗压试验,得到可靠的冻土力学参数,并采用正交试验的方法分析冻结深度、冻结宽度和冻结温度对地表沉降和管片拱顶沉降的影响规律和影响程度,选取确定最优冻结加固方案。结果表明：土体冻结温度越低,抗压强度越大；对地表沉降和管片拱顶沉降的影响排序为冻结深度>冻结宽度>冻结温度；最优冻结方案为冻结宽度6m,冻结深度15m,冻结温度-20℃。 |
| 英文摘要: |
| In order to ensure the safe start of shield tunnels in shallow, deep and water-rich soft strata, artificial freezing method is used to reinforce the end of shield tunnels. Through uniaxial compressive test of frozen soil in laboratory, reliable mechanical parameters of frozen soil are obtained. Orthogonal test method is used to analyze the influence law and degree of frozen depth, frozen width and frozen temperature on surface settlement and segment vault settlement, and the optimal freezing reinforcement scheme is selected.The results show that the lower the freezing temperature of soil, the greater the compressive strength; the order of influence on surface settlement and segment vault settlement is freezing depth>freezing width>freezing temperature; the optimum freezing scheme is freezing width of 6 m, freezing depth of 15 m, freezing temperature-20℃. |
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