本文主要研究内容
作者宋飞庭（2019）在《城市强风华花岗岩浅埋隧道施工降水对周边建筑物影响分析》一文中研究指出：在城市隧道的建设过程中,不可避免会产生穿越和邻近各种既有结构的情况,尤其是在城市的中心区域穿越地面上密集建筑物群的情况最为常见,这就造成了诸多工程技术和安全方面问题。本文以福州市某穿越建筑物的公路隧道为依托,通过系列的现场测试对地表沉降形态、建筑物受力变形特点及围岩变形规律进行了研究,对强风化花岗岩地层浅埋隧道施工降水的优化加固止水方案进行了数值分析和现场施工验证。对不同降水深度下周边建筑的变形情况和不同间距下隧道施工降水对周边建筑物的影响进行了研究,总结出建筑物距隧道边界的最小安全距离,为以后此类地质城市浅埋隧道工程类比设计积累经验。(1)通过降水初期对地表沉降和建筑物变形监测数据的分析,得出最大沉降均在两排抽水井中心,并且离抽水井越远,沉降值就越小,降水井抽水引起的地表沉降基本成漏斗形,降水井降水深度10m时,导致地表产生最大沉降量为22mm左右,建筑物中,最大沉降量为12.5mm,最大倾斜量达到H/238。(2)降水井降水深度10米时数值分析和现场实测数据对比,得出该数值模型中地表、建筑物沉降规律和现场实际监测规律相似,则数值分析模型的计算结果具有参考性。继续降水数值分析表明,地表最大沉降量为34.7mm,其导致的房屋最大沉降量将达到24.1mm,并且会加大房屋的倾斜,而在此基础上继续进行隧道开挖,房屋的沉降量将继续增大,其房屋的最大倾斜率达到H/91,此倾斜程度将远超过《民用建筑可靠性鉴定标准》(GB50292-2015)表7.3.10规定,多层钢筋混凝土框架结构侧向位移限值H/200的要求,建筑物将属于危房状态,现阶段必须停止降水,采取优化加固措施。(3)提出采用地表旋喷桩加固隧道上方的土体、地表旋喷桩在隧道两旁施加一排止水帷幕和对天水园小区侧面挡墙进行加固的综合优化加固方案,优化方案数值分析得到,天水园小区1#、2#楼平均沉降量增加1.6mm,省外贸宿舍平均沉降量增加1.7mm,这表明止水帷幕能有效控制降水井降水时建筑物的沉降。隧道开挖时,地表旋喷桩加固土体和两侧地表旋喷桩施作止水帷幕能降低隧道开挖对地表造成的影响。优化方案现场施工监测数据分析表明,在采用优化方案加固后,降水井后期降水和隧道开挖引起建筑物最大沉降量为2mm,最大倾斜率为H/214。这表明:地表旋喷桩施作止水帷幕、地表旋喷桩加固土体和加固挡土墙三种加固方案的综合作用能有效减小隧道降水施工对周边建筑物的影响。(4)数值分析结果表明:在改变降水井降水深度的情况下,降水井降水越深,会导致地表沉降量越大,但随着降水深度的增加,降水导致的地表沉降的增量越来越小,降水初期阶段,地表沉降增量成巨变规律,在后期增加降水深度致的沉降相对增势减弱。在改变建筑物与隧道的间距下数值分析得出:建筑物与隧道边界的距离在70m以上时能保证建筑物沉降控制标准要求;建筑物与隧道边界的距离在40m以上时能保证建筑物倾斜程度控制标准要求,所以建筑物与隧道边界的距离至少控制在70m以上才能保证隧道降水施工时建筑物的安全。
Abstract
zai cheng shi sui dao de jian she guo cheng zhong ,bu ke bi mian hui chan sheng chuan yue he lin jin ge chong ji you jie gou de qing kuang ,you ji shi zai cheng shi de zhong xin ou yu chuan yue de mian shang mi ji jian zhu wu qun de qing kuang zui wei chang jian ,zhe jiu zao cheng le zhu duo gong cheng ji shu he an quan fang mian wen ti 。ben wen yi fu zhou shi mou chuan yue jian zhu wu de gong lu sui dao wei yi tuo ,tong guo ji lie de xian chang ce shi dui de biao chen jiang xing tai 、jian zhu wu shou li bian xing te dian ji wei yan bian xing gui lv jin hang le yan jiu ,dui jiang feng hua hua gang yan de ceng jian mai sui dao shi gong jiang shui de you hua jia gu zhi shui fang an jin hang le shu zhi fen xi he xian chang shi gong yan zheng 。dui bu tong jiang shui shen du xia zhou bian jian zhu de bian xing qing kuang he bu tong jian ju xia sui dao shi gong jiang shui dui zhou bian jian zhu wu de ying xiang jin hang le yan jiu ,zong jie chu jian zhu wu ju sui dao bian jie de zui xiao an quan ju li ,wei yi hou ci lei de zhi cheng shi jian mai sui dao gong cheng lei bi she ji ji lei jing yan 。(1)tong guo jiang shui chu ji dui de biao chen jiang he jian zhu wu bian xing jian ce shu ju de fen xi ,de chu zui da chen jiang jun zai liang pai chou shui jing zhong xin ,bing ju li chou shui jing yue yuan ,chen jiang zhi jiu yue xiao ,jiang shui jing chou shui yin qi de de biao chen jiang ji ben cheng lou dou xing ,jiang shui jing jiang shui shen du 10mshi ,dao zhi de biao chan sheng zui da chen jiang liang wei 22mmzuo you ,jian zhu wu zhong ,zui da chen jiang liang wei 12.5mm,zui da qing xie liang da dao H/238。(2)jiang shui jing jiang shui shen du 10mi shi shu zhi fen xi he xian chang shi ce shu ju dui bi ,de chu gai shu zhi mo xing zhong de biao 、jian zhu wu chen jiang gui lv he xian chang shi ji jian ce gui lv xiang shi ,ze shu zhi fen xi mo xing de ji suan jie guo ju you can kao xing 。ji xu jiang shui shu zhi fen xi biao ming ,de biao zui da chen jiang liang wei 34.7mm,ji dao zhi de fang wu zui da chen jiang liang jiang da dao 24.1mm,bing ju hui jia da fang wu de qing xie ,er zai ci ji chu shang ji xu jin hang sui dao kai wa ,fang wu de chen jiang liang jiang ji xu zeng da ,ji fang wu de zui da qing xie lv da dao H/91,ci qing xie cheng du jiang yuan chao guo 《min yong jian zhu ke kao xing jian ding biao zhun 》(GB50292-2015)biao 7.3.10gui ding ,duo ceng gang jin hun ning tu kuang jia jie gou ce xiang wei yi xian zhi H/200de yao qiu ,jian zhu wu jiang shu yu wei fang zhuang tai ,xian jie duan bi xu ting zhi jiang shui ,cai qu you hua jia gu cuo shi 。(3)di chu cai yong de biao xuan pen zhuang jia gu sui dao shang fang de tu ti 、de biao xuan pen zhuang zai sui dao liang pang shi jia yi pai zhi shui wei mu he dui tian shui yuan xiao ou ce mian dang qiang jin hang jia gu de zeng ge you hua jia gu fang an ,you hua fang an shu zhi fen xi de dao ,tian shui yuan xiao ou 1#、2#lou ping jun chen jiang liang zeng jia 1.6mm,sheng wai mao su she ping jun chen jiang liang zeng jia 1.7mm,zhe biao ming zhi shui wei mu neng you xiao kong zhi jiang shui jing jiang shui shi jian zhu wu de chen jiang 。sui dao kai wa shi ,de biao xuan pen zhuang jia gu tu ti he liang ce de biao xuan pen zhuang shi zuo zhi shui wei mu neng jiang di sui dao kai wa dui de biao zao cheng de ying xiang 。you hua fang an xian chang shi gong jian ce shu ju fen xi biao ming ,zai cai yong you hua fang an jia gu hou ,jiang shui jing hou ji jiang shui he sui dao kai wa yin qi jian zhu wu zui da chen jiang liang wei 2mm,zui da qing xie lv wei H/214。zhe biao ming :de biao xuan pen zhuang shi zuo zhi shui wei mu 、de biao xuan pen zhuang jia gu tu ti he jia gu dang tu qiang san chong jia gu fang an de zeng ge zuo yong neng you xiao jian xiao sui dao jiang shui shi gong dui zhou bian jian zhu wu de ying xiang 。(4)shu zhi fen xi jie guo biao ming :zai gai bian jiang shui jing jiang shui shen du de qing kuang xia ,jiang shui jing jiang shui yue shen ,hui dao zhi de biao chen jiang liang yue da ,dan sui zhao jiang shui shen du de zeng jia ,jiang shui dao zhi de de biao chen jiang de zeng liang yue lai yue xiao ,jiang shui chu ji jie duan ,de biao chen jiang zeng liang cheng ju bian gui lv ,zai hou ji zeng jia jiang shui shen du zhi de chen jiang xiang dui zeng shi jian ruo 。zai gai bian jian zhu wu yu sui dao de jian ju xia shu zhi fen xi de chu :jian zhu wu yu sui dao bian jie de ju li zai 70myi shang shi neng bao zheng jian zhu wu chen jiang kong zhi biao zhun yao qiu ;jian zhu wu yu sui dao bian jie de ju li zai 40myi shang shi neng bao zheng jian zhu wu qing xie cheng du kong zhi biao zhun yao qiu ,suo yi jian zhu wu yu sui dao bian jie de ju li zhi shao kong zhi zai 70myi shang cai neng bao zheng sui dao jiang shui shi gong shi jian zhu wu de an quan 。
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论文作者分别是来自长安大学的宋飞庭，发表于刊物长安大学2019-11-04论文，是一篇关于浅埋隧道论文,井点降水论文,既有建筑物论文,现场实测论文,有限元论文,加固措施论文,安全距离论文,长安大学2019-11-04论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自长安大学2019-11-04论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：浅埋隧道论文; 井点降水论文; 既有建筑物论文; 现场实测论文; 有限元论文; 加固措施论文; 安全距离论文; 长安大学2019-11-04论文;