东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (1): 129-136.DOI: 10.12068/j.issn.1005-3026.2024.01.016
柏谦1, 赵文1, 曹文欣1, 卢彦军2
收稿日期:
2022-08-08
出版日期:
2024-01-15
发布日期:
2024-04-02
作者简介:
柏 谦(1994-),男,辽宁铁岭人,东北大学讲师,博士基金资助:
Qian BAI1, Wen ZHAO1, Wen-xin CAO1, Yan-jun LU2
Received:
2022-08-08
Online:
2024-01-15
Published:
2024-04-02
摘要:
基于管幕与横梁作用下大断面开挖相似模型试验,研究开挖引起的管幕变形和地表沉降变化规律.为充分研究参数变化对管幕变形和地表沉降的影响,运用有限元软件建立三维数值模型,以此模型为依据,分析管幕抗弯刚度和横梁抗弯刚度对管幕变形和地表沉降的影响,并根据模糊数学理论对最优刚度匹配进行研究.研究结果表明:管幕结构整体变形类似于“板”,且关于中间管幕对称,管幕跨中断面地表沉降呈“凹槽”型,符合Peck曲线分布;管幕变形和地表沉降均与横梁刚度和管幕刚度呈指数函数关系,且对横梁刚度变化更为敏感;管幕刚度与横梁刚度分别为0.5D和2K时,可以兼顾安全性与经济性.
中图分类号:
柏谦, 赵文, 曹文欣, 卢彦军. 管幕和横梁作用下大断面开挖变形响应研究[J]. 东北大学学报(自然科学版), 2024, 45(1): 129-136.
Qian BAI, Wen ZHAO, Wen-xin CAO, Yan-jun LU. Study on Deformation Response Caused by Large-Section Excavation Under the Support of Pipe-Roof and Beam[J]. Journal of Northeastern University(Natural Science), 2024, 45(1): 129-136.
类型 | 含水率 | 湿密度 | c | φ | Es |
---|---|---|---|---|---|
% | g·cm-3 | kPa | (°) | MPa | |
原型土 | 10.4 | 1.81 | 1.5 | 35 | 36~48 |
模型土 | 10.4 | 1.78 | 0.98 | 33.1 | 1.04 |
表1 原型和模型土的物理力学参数 (of prototype and model soil)
Table 1 Physico‐mechanical parameters
类型 | 含水率 | 湿密度 | c | φ | Es |
---|---|---|---|---|---|
% | g·cm-3 | kPa | (°) | MPa | |
原型土 | 10.4 | 1.81 | 1.5 | 35 | 36~48 |
模型土 | 10.4 | 1.78 | 0.98 | 33.1 | 1.04 |
编号 | 管幕刚度 | 横梁刚度 |
---|---|---|
1 | 0.5D | 0.5K |
2 | 0.5D | K |
3 | 0.5D | 1.5K |
4 | 0.5D | 2K |
5 | D | 0.5K |
6 | D | K |
7 | D | 1.5K |
8 | D | 2K |
9 | 1.5D | 0.5K |
10 | 1.5D | K |
11 | 1.5D | 1.5K |
12 | 1.5D | 2K |
13 | 2D | 0.5K |
14 | 2D | K |
15 | 2D | 1.5K |
16 | 2D | 2K |
表2 参数组合
Table 2 Parameter combinations
编号 | 管幕刚度 | 横梁刚度 |
---|---|---|
1 | 0.5D | 0.5K |
2 | 0.5D | K |
3 | 0.5D | 1.5K |
4 | 0.5D | 2K |
5 | D | 0.5K |
6 | D | K |
7 | D | 1.5K |
8 | D | 2K |
9 | 1.5D | 0.5K |
10 | 1.5D | K |
11 | 1.5D | 1.5K |
12 | 1.5D | 2K |
13 | 2D | 0.5K |
14 | 2D | K |
15 | 2D | 1.5K |
16 | 2D | 2K |
编号 | y11/mm | y12/万元 |
---|---|---|
3 | 49.05 | 29.86 |
4 | 45.8 | 31.12 |
7 | 47.9 | 35.82 |
8 | 44.7 | 37.08 |
11 | 47.1 | 40.12 |
12 | 43.45 | 41.38 |
14 | 49.05 | 42.32 |
15 | 44 | 43.58 |
16 | 41.5 | 44.85 |
表3 参数组合及评价指标计算结果 (and calculation results)
Table 3 Parameters of the specimens
编号 | y11/mm | y12/万元 |
---|---|---|
3 | 49.05 | 29.86 |
4 | 45.8 | 31.12 |
7 | 47.9 | 35.82 |
8 | 44.7 | 37.08 |
11 | 47.1 | 40.12 |
12 | 43.45 | 41.38 |
14 | 49.05 | 42.32 |
15 | 44 | 43.58 |
16 | 41.5 | 44.85 |
i | ti | i | ti |
---|---|---|---|
1 | 0.50 | 6 | 0.49 |
2 | 0.67 | 7 | 0.08 |
3 | 0.38 | 8 | 0.38 |
4 | 0.55 | 9 | 0.50 |
5 | 0.29 |
表4 模糊综合评价隶属度ti 计算结果 (of fuzzy comprehensive evaluation)
Table 4 Calculation results of membership ti
i | ti | i | ti |
---|---|---|---|
1 | 0.50 | 6 | 0.49 |
2 | 0.67 | 7 | 0.08 |
3 | 0.38 | 8 | 0.38 |
4 | 0.55 | 9 | 0.50 |
5 | 0.29 |
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