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工程科学与技术:2010,42(2):69-74
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箱型地铁隧道30°斜穿地裂缝的相似模型试验设计
(1.长安大学 建筑工程学院,陕西 西安 710061;2.长安大学地测学院;3.长安大学建筑工程学院)
Study on the Design of Similar Model Test of Box Tunnel Crossing Ground Fissure With 30°
(1.School of Civil Eng.,Chang’an Univ.,Xi’an 710061,China;2.School of Geology Eng. and Geomatics, Chang’an Univ.;3.School of Civil Eng.,Chang’an Univ.)
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投稿时间:2008-12-09    修订日期:2009-02-01
中文摘要: 为了研究小角度(30°)斜穿地裂缝的箱型隧道衬砌结构在地裂缝影响下的变形破坏模式和影响规律,从西安地铁工程背景和西安地裂缝地质环境出发,根据相似理论设计了箱型隧道衬砌结构模型试验的相似常数,在此基础上对模型混凝土、模型钢筋、结构围岩参数等进行了设计。该结构模型试验拟对结构钢筋、混凝土进行应变测量,对结构顶底板接触土压力和结构外围土压力、结构内部收敛位移、模型顶表面土体变形等进行量测和观测,通过多台60通道静态应变仪的串联以及10位转换开关的组合,能实现672个测点的自动化量测。借助长安大学地基沉降实验平台,通过自锁式千斤顶的缓慢下降实现地裂缝上盘相对下降的模拟,地裂缝的活动速率和错动量通过工控机控制自锁式千斤顶的运行速率和行程来实现,该试验设计满足试验要求,能实现模型试验目标。
Abstract:In order to study the deformation destructive pattern and influence rule of box tunnel lining structure cross the ground fissure with 30 degree, based on the background of Xi’an metro engineering and the geological environment of Xi’an ground fissure, the similar constant of box tunnel lining structure modelling experiment was designed according to the similar theory, furthermore, the parameters of model concrete, model reinforcement bar and model structure country soil were designed. Strain measurement of structure reinforcement bar and concrete, measurements of contact soil pressure and peripheral soil, convergence displacement of lining and the soil displacement on the top of model are proposed. The automatic monitor of 672 mearing points is implemented by the series of static strain tester with 60 channels and the combination of changeover switch with 10 bits. With the assist of foundation settlement test plate of Chang’an University, the hanging layer of ground fissure relative to lying layer slowly falling is realized by the slowly falling of latching jack. The activity speed and faulted quantity of ground fissure is implemented by the operation speed and distance of jack controlled by the controller.With the test design, the test challenge can be meeted, and the test target can be realized.
文章编号:200800664     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(40602033);国家自然科学基金重点项目(40534021)
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胡志平,彭建兵,王启耀,黄强兵.箱型地铁隧道30°斜穿地裂缝的相似模型试验设计[J].工程科学与技术,2010,42(2):69-74.
Hu Zhiping,Peng Jianbing,Wang Qiyao,Huang Qiangbing.Study on the Design of Similar Model Test of Box Tunnel Crossing Ground Fissure With 30°[J].Advanced Engineering Sciences,2010,42(2):69-74.