摘要
为了对比分析上下台阶法和CD法(中隔墙法)施工引起的隧道变形及受力特点,依托滨莱高速公路淄博西至莱芜段改扩建工程中的樵岭前隧道施工,基于FLAC^(3D)数值模拟软件,并结合现场施工应用情况,对比分析两种工法的优缺点,进而提出了有效的变形控制措施。研究结果表明:CD法施工在控制地面沉降及围岩变形方面优于上下台阶法,且产生的围岩塑性区较小;上下台阶法具有足够的施工空间与较快的施工速度,且相对CD法施工成本降低,但在浅埋隧道工程中易造成隧道围岩变形过大等问题,更多的是采用CD法;注浆加固可以有效地提高围岩的自稳性,增加径向注浆长度以及预留段长度等措施具有较高的可操作性,同时也有较好的加固效果。
In order to compare and analyze the tunnel deformation and stress characteristics caused by the construction of the bench method and the CD(center diaphragm) method, the construction of the Qian Lingqian tunnel in the reconstruction and expansion project of Zibo West to Laiwu Section of Binlai Expressway is simulated by FLAC^3D. Combined with the on-site construction application, the advantages and disadvantages of the two methods are compared and analyzed, and then effective deformation control measures are proposed. The results are as follows: CD method is better than bench method in controlling ground subsidence and surrounding rock deformation, and the resulting plastic zone of surrounding rock is smaller;the bench method has sufficient construction space and faster construction speed, and the construction cost is lower than that of the CD method, but in the shallow buried tunnel construction, the deformation of the surrounding rock of the tunnel is likely to be too large, therefore the CD method is widely used;grouting reinforcement can effectively improve the self-stability of the surrounding rock. Measures such as increasing the length of the radial grouting and the length of the reserved section have higher operability and have better reinforcement effects as well.
作者
郑广顺
崔帅帅
陈鲁川
ZHENG Guangshun;CUI Shuaishuai;CHEN Luchuan(Qilu Transportation Development Group Co.,Ltd.Construction Management Branch,Jinan,Shandong 250102,China;School of Civil Engineering,Shandong University,Jinan,Shandong 250061,China;Qilu Transportation Development GroupCo.,Ltd.,Jinan,Shandong 250102,China)
出处
《水利与建筑工程学报》
2019年第1期227-232,共6页
Journal of Water Resources and Architectural Engineering
基金
山东省自然科学基金项目(ZR2017MEE051)
山东省重点研发计划(公益类专项)项目(2018GHY115015)
关键词
浅埋
大跨小净距
数值模拟
变形控制
shallow buried
large span and small spacing
numerical simulation
deformation control
