| 西安黄土地层盾构施工的Peck公式修正 |
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| 引用本文： | 冯晓光,任建喜,王金华. 西安黄土地层盾构施工的Peck公式修正[J]. 西安科技大学学报, 2012, 32(3): 343-347 |
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| 作者姓名： | 冯晓光 任建喜 王金华 |
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| 作者单位： | 西安科技大学建筑与土木工程学院,陕西西安,710054 |
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| 摘 要： | 以西安黄土地区某区间段地铁隧道盾构施工实测数据为基础,通过peck公式的两个重要参数,即沉降槽宽度系数K,地层土体损失率η,对Peck公式进行修正,使其能适用于黄土地区,并为今后黄土地区地铁的盾构施工提供参考依据。研究表明,修正后的沉降槽宽度系数为K=0.42～0.445,地层损失率应根据不同的地层情况和施工参数进行确定,一般情况下取η=0.82%～1.65%是合理的。
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| 关 键 词： | 西安地铁 地表沉降 Peck公式 沉降槽宽度系数 地层损失率 |
Improvement of Peck formula for shield construction in Xi'an loess area |
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| FENG Xiao-guang,WANG Jin-hua. Improvement of Peck formula for shield construction in Xi'an loess area[J]. JOurnal of XI’an University of Science and Technology, 2012, 32(3): 343-347 |
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| Authors: | FENG Xiao-guang WANG Jin-hua |
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| Affiliation: | ( College of Architecture and Civil Engineering ,Xi＇ an University of Science and Technology,Xi＇ an 710054, China) |
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| Abstract: | Based on a certain interval of metro tunnel shield construction measured data in loses area of Xi＇ an, the Peck formula is modified through two important parameters of Peck formula, namely the set tlement trough width coefficient and soil loss rate, so that it can be applied in loess area and provide the reference for the subway shield construction in the future. The results show that the modified settlement trough width coefficient is K = 0. 42 0. 445, ground loss rate should be identified according to different geologic condition and construction parameters, in the general cases, η= 0. 82% 1.65% is reasona ble. |
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| Keywords: | Xi＇ an metro surface subsidence Peck formula settlement trough width coefficient soilloss rate |
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