地裂缝场地综合管廊受力和变形数值模拟

李奇; 吴松锋; 于文杰

doi:10.3724/j.gyjzG23061309

地裂缝场地综合管廊受力和变形数值模拟

doi: 10.3724/j.gyjzG23061309

1. 河南省核技术应用中心, 郑州 450044;
2. 郑州航空工业管理学院土木建筑学院, 郑州 450000

基金项目:

河南省科技攻关项目(222102320468)。

详细信息

作者简介:
李奇,男,高级工程师,学士,主要从事地质环境和地质灾害方向的研究。电子信箱:635885864@qq.com

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出版历程
- 收稿日期: 2023-06-13
- 网络出版日期: 2024-08-16

Numerical Simulations for Force and Deformation of Utility Tunnels over a Ground Fissure

1. Henan Nuclear Technology Application Center, Zhengzhou 450044, China;
2. School of Civil Engineering and Architecture, Zhengzhou University of Aeronautics, Zhengzhou 450000, China

摘要

摘要: 以穿越地裂缝场地的郑州某综合管廊区间为研究对象,采用数值模拟的方法,分析地裂缝上盘不同沉降量时地表土和管廊的受力与变形情况。分析结果表明,由于管廊刚度较大,当上盘沉降量较小时,管廊所对应的地表土发生隆起;随着沉降量的增大,地表土隆起量减小,甚至发生沉降,综合管廊的沉降也变大,弯曲程度也越大。上盘发生沉降时,管廊顶板处产生拉应力,拉应力最大值出现在管廊顶板中央,管廊底板处产生压应力,压应力最大值出现在管廊底板中央。随着上盘沉降量的增大,管廊的最大拉压应力都会增加。当上盘发生沉降时,在管廊宽度方向上的变形在0.1~10 μm,属于微小变形,在管廊轴向的变形量较大,在管廊高度方向的变形量最大,但不同位置的变形大小没有规律。
- 综合管廊 /
- 活动地裂缝 /
- 数值模拟 /
- 力学特征 /
- 变形特征
Abstract: Taking an interval of a utility tunnel over a ground fissure in Zhengzhou as the research object, numerical simulations were conducted to analyze the force and deformation of the ground and the utility tunnel in different settlements of the hangingwall of the ground crack. The analysis results showed that due to the large stiffness of the utility tunnel, when the settlement of the hangingwall was smaller, the ground over the utility tunnel heaved; with the increase in settlement, the heave of the ground dropped and the ground even settled, and the settlement and flexure of the utility tunnel increased. When the hangingwall settled, the tensile stress occurred in the top plate of the utility tunnel, and the maximum tensile stress generated at the center of the top plate of the utility tunnel. and the maximum value of tensile stress appears in the center of the top plate; simultaneously, the compressive stress generated in the bottom plate of the utility tunnel, and the maximum compressive stress appeared in the center of the bottom plate of the utility tunnel. With the increase in settlement of the hangingwall, both of the tensile and compressive stresses increased. When the hangingwall settled, the deformation in the direction of width of the utility tunnel was between 0.1 to 10 μm, which was tiny deformation. the deformation in the direction of axle of the utility tunnel was larger and the largest was in the direction of height, however, the deformation at each joint had not regularity.
- utility tunnel /
- ground fissure /
- numerical simulation /
- mechanical characteristic /
- deformation characteristic

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