地裂缝与斜交地铁隧道动力响应数值分析

刘蕾; 刘雪玲; 周金喜

doi:10.12090/j.issn.1006-6616.2018.24.02.025

地裂缝与斜交地铁隧道动力响应数值分析

doi: 10.12090/j.issn.1006-6616.2018.24.02.025

1.
中国矿业大学(北京)资源与安全工程学院, 北京 100083
2.
长安大学地质工程与测绘学院, 陕西西安 710054
3.
青海省有色地质矿产勘查局八队, 青海西宁 810001

基金项目:

国家自然科学基金项目 41172257

青海省自然科学基 2017-ZJ-909

青海省应用基础研究 2014-ZJ-706

详细信息

作者简介:
刘蕾(1983-), 女, 博士, 主要从事地质工程及安全工程等方面的研究。E-mail:46744214@qq.com

中图分类号: U451+.5
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- 被引次数: 0
出版历程
- 收稿日期: 2017-08-28
- 修回日期: 2017-12-28
- 刊出日期: 2018-04-01

NUMERICAL ANALYSIS ON DYNAMIC RESPONSE OF THE OBLIQUE METRO TUNNEL IN GROUND FISSURE AREA

1.
College of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China
2.
College of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, Shannxi, China
3.
No.8 Team of Geology and Mineral Resources Bureau for Non-Ferrous Metals of Qinghai Province, Xining 810012, Qinghai, China

摘要

摘要: 采用ABAQUS有限元软件建立马蹄形地铁隧道与地裂缝呈60°斜交的计算模型研究地铁运行引起的地裂缝附近地层的振动响应。计算结果表明：隧道附近的土体振动较强烈，距离隧道越远，土体的加速度幅值越小；振动响应较强烈的区域，沿隧道纵向约为120 m，沿竖直方向为隧道下方15 m，与隧道纵向垂直的水平方向上为隧道左右20 m范围；振动在与隧道纵向垂直的水平方向传播时，无地裂缝地带在隧道两侧均匀衰减，地裂缝地带在有地裂缝的一侧振动衰减较快，说明地裂缝对地铁振动在地层中的传播有较强的阻隔作用；地裂缝附近隧道下方土层的振动要比上部土层强烈，传至地表的振动加速度基本衰减为零。
- 地裂缝 /
- 地铁隧道 /
- 列车荷载 /
- 动力响应 /
- 数值分析
Abstract: A numerical analysis model, with an oblique crossing of 60°between horseshoe-shaped metro tunnel and ground fissure, was built with ABAQUS to study the dynamic response of the oblique metro tunnel in ground fissure area under vibration load of metro. The results show that the soil vibration near the tunnel is stronger, and the acceleration amplitude of the ground near the tunnel are greater than those far away from the tunnel. The area with strong vibration response is within 120 metres along the metro tunnel, 15 metres under the tunnel in vertical direction, and 20 metres in both sides of the tunnel. Ground fissure has a strong barrier effect on the propagation of subway vibration in the soil. The vibration of the soil below the ground fissure is stronger than that of the upper soil layer, and the vibration acceleration on the ground level of the soil nearly reduces to zero.
- ground fissure /
- metro tunnel /
- train load /
- dynamic response /
- numerical analysis

HTML全文

图 1 试验模型图(单位：cm)

Figure 1. Schematic diagram of test model(unit:cm)

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图 2 无限单元示意图

Figure 2. Schematic diagram of infinite element

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图 3 车辆荷载计算模型

Figure 3. Computational model of metro load

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图 4 各测量点及测量线布置示意图

Figure 4. Layout of each measuring point and line

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图 5 各测点竖向加速度时程曲线

Figure 5. Time-history curves of vertical acceleretion of monitoring points

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图 6 测线一、二竖向加速度幅值分布曲线

Figure 6. Amplitude curves of vertical acceleration of monitoring line 1 and 2

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图 7 测线三竖向加速度幅值随深度变化曲线

Figure 7. The amplitude curves of vertical acceleration of monitoring line 3

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表 1 西安地铁二号线典型地段地层参数

Table 1. Formation parameters of typical ground fissures in Xi'an metro line 2

土层	重度/(kN/m³)	弹性模量/MPa	泊松比μ	粘聚力/kPa	内摩擦角	埋深/m
杂填土(Q₄^ml)	17.3	1.2	0.35	16	11°	1.7
黄土(Q₄^al)	18.6	3.5	0.35	24	19°	4.6
黄土(Q₃^eol)	19.2	4.0	0.30	30	21°	13
古土壤(Q₃^el)	19.6	4.5	0.32	35	23°	16.4
黄土(Q₂^eol)	19.6	8.0	0.33	40	26°	20
粉质粘土(Q₂^al)	19.6	10.0	0.30	40	26°	50

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