棋牌大全下载安装

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                                1. 当前位置: 代写一篇论文多少钱 > 工程师论文 > 坑中坑对地铁基坑支护结构的影响及应对措施

                                  坑中坑对地铁基坑支护结构的影响及应对措施

                                  时间:2019-03-05 14:48作者:吴子淇
                                  本文导读:这是一篇关于坑中坑对地铁基坑支护结构的影响及应对措施的文章,在地铁建设实际工程中,常遇到需要在深(大)基坑内进行二次开挖得到内部小坑来容纳局部结构的情况,或地铁与市政工程共建的情况,或“十”字换乘车站的方案。

                                    摘    要: 以多个工程项目的成功经验分析坑中坑对地铁基坑支护结构设计的各种不利影响,提出具体应对措施,并对其予以归类总结,以期对岩土工程师应对该类困难时提供帮助。

                                    关键词:棋牌大全下载安装 地铁基坑; 坑中坑; 不利影响; 应对措施;

                                    Abstract: 棋牌大全下载安装Based on the successful experience of several engineering projects, this paper analyzes and discusses the adverse effects of pit in pit on the supporting structure design of subway foundation pit, puts forward specific countermeasures, and classifies and summarizes them, so as to provide help for geotechnical engineers to deal with such difficulties.

                                    Keyword: subway foundation pit; pit in pit; adverse effects; solutions;

                                    1 、引言

                                    ZAIDITIEJIANSHESHIJIGONGCHENGZHONG,CHANGYUDAOXUYAOZAISHEN(DA)JIKENGNEIJINXINGERCIKAIWADEDAONEIBUXIAOKENGLAIRONGNAJUBUJIEGOUDEQINGKUANG,HUODITIEYUSHIZHENGGONGCHENGGONGJIANDEQINGKUANG,HUO“SHI”ZIHUANCHENGCHEZHANDEFANGAN。ZHEIXIEDOUHUISHEJIKENGZHONGKENGWENTI,DANMUQIANXIANGGUANGUIFANZHONGMEIYOUSHEJIKENGZHONGKENGJUTIQINGKUANG,DAOZHIZAISHIJIGONGCHENGZHONGSHEJIRENYUANQUESHAOYIJU,WANGWANGDIGUSHENZHIYUHULVEKENGZHONGKENGDEBULIYINGXIANG,SHIJIKENGWEIHUSHEJIFANGANANQUANDUBUZU,CONGERCHANSHENGJIKENGSHIWENSHIGUDEFASHENG。

                                    2 、坑中坑对基坑工程的影响

                                    TONGCHANGCAIYONGKULUNTUYALILILUNHUOLANGKENTUYALILILUNJISUANZUOYONGZAIJIKENGWEIHUJIEGOUSHANGDETUYALIZHI,DANLILUNDEJIASHEYUSHIJIQINGKUANGYOUYIDINGDECHURU。YIXIESHIYANJIEGUOZHENGMING,KULUNTUYALILILUNZAIJISUANZHUDONGTUYALISHI,YUSHIJIJIAOWEIJIEJIN;JISUANBEIDONGTUYALISHI,QIJISUANJIEGUOYUSHIJIXIANGBIWANGWANGPIANDA。LANGKENLILUNYOUYUMEIYOUKAOLVQIANGBEIBIANJIETIAOJIAN,QIJISUANJIEGUOYUSHIJIBIJIAOWANGWANGZHUDONGTUYALIPIANDA,ERBEIDONGTUYALIPIANXIAO。GUERZAISHIJIYINGYONGZHONG,YOUQIZHENDUIRUANTUDICENG,ZHOUBIANHUANJINGFUZADE,DUOANLANGKENTUYALILILUNJISUAN,YOULIYUJIKENGDEANQUAN。DUIYUCUNZAIKENGZHONGKENGDEJIKENG,YOUYU2ZHONGJINGDIANLILUNCAIYONGDESHIBANWUXIANTUTIDEJIASHETIAOJIAN,ERDUIJIAOQIANJIKENGBEIDONGQUTUTIYOUYUKENGZHONGKENGDECUNZAI,SHUYUYOUXIANTUTIFANCHOU;DUIJIAOSHENJIKENGZHUDONGQUTUTIYOUYUQIANJIKENGDEXIANQIKAIWA,TUTIDEGUJIEYINGXIANG,ZHEIXIEDOUHUIYINGXIANGJIKENGJISUANMOXINGDEBIANJIETIAOJIAN,ERQIEDADOUWEIBULIYINGXIANG[1,2,3]。

                                    3、 坑中坑对基坑支护结构影响的应对措施

                                    3.1、 小型坑中坑

                                  棋牌大全下载安装   WEIMANZUDITIECHEZHANJIANZHUSHIYONGGONGNENG,CHANGXUZAIZHUTISHEN(DA)JIKENGNEIJINXINGERCIKAIWADEDAONEIBUXIAOKENG,LAIRONGNADIANTIJING、JISHUIJINGDENGJUBUJIEGOU(CUOSHI)DEQINGKUANG,ZHEILEIKENGZHONGKENGXIANGDUIYUSHEN(DA)JIKENG,TILIANGXIAO,ERCIKAIWASHENDUQIAN。

                                    在设计上,合理布置坑中坑位置,尽量远离围护结构;优化局部结构体量,尽量做到坑中坑平面规则、深度浅,以减小坑中坑对支护结构的影响。视地层及周边环境的情况,采取必要的措施。在饱和黏土地层,周边环境较简单,可采取坑内放坡开挖;在软土地层,粉砂含水地层,周边环境复杂的,坑中坑影响范围内需采取地层加固措施。另外,应明确施工顺序,基坑开挖至设计标高后,尽快完成垫层施作,再进行二次基坑开挖。
                                   

                                  坑中坑对地铁基坑支护结构的影响及应对措施
                                   

                                    3.2 、较大、长条型坑中坑

                                    YIMOUDITIECHEZHANWEILI,CHEZHANZHUTIYANCHENGSHIZHUGANDAOBUZHI,LINGGAIZHUGANDAOGUIHUADIXIACHEXINGDAO。WEIHELILIYONGCHENGSHIDIXIAKONGJIAN,CAIQUERZHEGONGJIANFANGAN,TONGQIMINGWASHIGONG,LINGYINERZHEKUANDUXUYAOJIAODA,WEIHELIYOUHUAGONGCHENGZAOJIAJIGONGQI,CAIQUKENGZHONGKENGZHIHUFANGAN。JIEGOUDIXIA1CENGWEIGUIHUACHEXINGDAO;DIXIA2CENGWEIDITIEZHANTINGCENG;DIXIA3CENGWEIDITIEZHANTAICENG。DINGBANFUTU2.5m,DIXIA1CENGDIBANMAISHEN9.5m,DIXIA3CENGDIBANMAISHEN23m。JIKENGZHIHUGENJUCHENGZAINENGLIJIXIANZHUANGTAIJINXINGSHEJI,FENBIEJINXINGCHENGZAILIJISUANHEWENDINGXINGJIBIANXINGYANSUAN。QUEBAOZHIHUJIEGOUWENDING,BUCHANSHENGQINGFU、HUAYIHEJUBUSHIWEN,ZHICHENGXITONGBUSHIWEN。

                                  棋牌大全下载安装   GENJUJINGDIANDELANGKENTUYALILILUN,BEIDONGQUWUXIANTUTIHUALIEMIANYUSHUIPINGMIANJIAJIAO,JIJIANQIEPOHUAIJIAOWEI45°+φ/2(φWEITUDENEIMOCAJIAO)。ZHENDUIBENZHANQIANJIKENG,BEIDONGQUTUTISHOUKENGZHONGKENGDEYINGXIANG,YOUXIANFANWEITUTIDETUYALISHIXIAOYUPUTONGBANWUXIANLIANXUTUTIDETUYALI,JIBEIDONGQUTUYALIJISUANQUZHIYUSHIJIXIANGBIPIANDA,DUIJIKENGANQUANSHIBULIDE,DAOZHIRUKANGQINGFUANQUANXISHU(ZHUANGQIANGNEICEBEIDONGQUKANGQINGFUZUOYONGLIJUZONGHE/ZHUANGQIANGWAICEZHUDONGQUKANGQINGFUZUOYONGLIJUZONGHE)JISUANJIEGUOYUSHIJIXIANGBIPIANDA[4]。

                                    DUIYUNEIKENG(KENGZHONGKENG),YOUYUWAIKENG(QIANJIKENG)KAIWAXIEHEDEYINGXIANG,KENGDIYIXIADETUTICHUYUCHAOGUJIEZHUANGTAI,KENGZHONGKENGDEKAIWAJIANGSHIZUOYONGZAIKENGZHONGKENGWEIHUTISHANGDETUYALIYOUJINGZHIDECEXIANGTUYALIFENBUQUXIANXIANGZHUDONGTUYALIQUXIANFAZHAN,JIANPUTONGJIKENGJISUANFANGFADECHUDENEIKENGWAICETUYALIYUSHIJIZUOYONGZAINEIKENGZHUANGQIANGWAICEDETUYALIXIANGBIPIANXIAO,ZHEIDUIJIKENGANQUANSHIBULIDE,DAOZHIRUKANGQINGFUANQUANXISHUJISUANJIEGUOYUSHIJIXIANGBIYEPIANDA[5]。

                                  棋牌大全下载安装   GUERJISUANGUOCHENGZHONGXUZHUYIZHEIXIEYINGXIANGYINSU,DUISHURUJISUANRUANJIANDECANSHUJINXINGXIUZHENG。TONGSHI,WEIGAISHANBIANJIETIAOJIANERCAIQUCUOSHI,RUQIANJIKENGKENGDITUTIJIAGUCUOSHI,JIAQIANGBEIDONGQUTUTI;JIAQIANGKENGZHONGKENGZHIHUJIEGOUDEZHENGTIGANGDU。BENZHANZUIZHONGJIKENGZHIHUFANGANZHUYAOTU1SUOSHI,WAIKENGZHIHUFANGANWEISMWGONGFAZHUANG+NEIZHICHENG(DIYIDAOWEIHUNNINGTUZHICHENG,SHEZHILINSHILIZHU),KENGDIJIAOBANZHUANGJIAGU(HOUDU3m)。NEIKENGZHIHUFANGANWEIDILIANQIANG(QIANJIKENGFANWEINEIWEISUHUNNINGTU)+NEIZHICHENG(DIYIDAOWEIHUNNINGTUZHICHENG,SHEZHILINSHILIZHU)。RUJIKENGZHOUBIANHUANJINGFUZA,DIZHITIAOJIANJIAOCHA,HAIKEWAIKENGKENGDISUHUNNINGTUDIANCENGNEIZENGSHEGOUZAOGANGJIN。

                                    3.3、“十”字换乘节点坑中坑

                                    YIMOU“SHI”ZIHUANCHENGDITIECHEZHANWEILI,ZHUYAOFENXIPINGMIANSHANGKENGZHONGKENGDAILAIDEBULIYINGXIANGJIYINGDUICUOSHI。CHEZHANYUYUANQIDITIEXIAN“SHI”ZIHUANCHENG,HUANCHENGJIEDIANCHUTONGQISHIGONG,CAIQUKENGZHONGKENGZHIHUFANGAN。

                                    YIBANJIKENGZHIHUJIEGOU,NEIZHICHENGLIANGDUANDESHOULISHIDUIDENGDE,SHIYIZHONGPINGHENGZHUANGTAI。ERDUIYUCHEZHANHUANCHENGJIEDIANKENGZHONGKENG(XIECHENGZHIHUTIXI),ZHICHENGLIANGDUANDEQIANGTISUOSHOUTUYALICHAYIMINGXI,BIRANHUIDAOZHISUOSHOUTUYALIJIAOXIAODEQIANGTIXIANGKENGWAIYIDONG,WAICETUTILONGQI,QIANGTISUOSHOUTUYALIZHIZHUJIANZENGDA;TONGSHI,SUOSHOUTUYALIJIAODADEQIANGTIXIANGKENGNEIYIDONG,WAICETUTIXIACHEN,QIANGTISUOSHOUTUYALIZHIZHUJIANJIANXIAO,ZHIDAOERZHEDADAOXINDEPINGHENGWEIZHI。ERZHEIXIEDUIJIKENGANQUANDOUSHIBULIDE[6]。

                                    图1 某地铁车站主体围护结构横断面图
                                  图1 某地铁车站主体围护结构横断面图

                                  棋牌大全下载安装   ZHENDUIZHEILEIQINGKUANG,KECAIQUKENGZHONGKENGKENGWAIZHUDONGQUTUTIJIAGUCUOSHI,HUANCHENGDUANWAIZHUANJIAOCHUCAIYONGDICENGJIAGUCUOSHI,JIAQIANGKENGZHONGKENGZHIHUJIEGOUGANGDU(WEIHUJIEGOUWEIDILIANQIANG,KENGNEIDIYIDAOZHICHENGCAIQUHUNNINGTUZHICHENG,SHEZHIFENGBIHUNNINGTUYAOLIANG),LINGJISUANDANGENZHICHENGDANXINGZHIDIANGANGDUXISHUSHI,DUIZHICHENGBUDONGDIANDIAOZHENGXISHUHELIQUZHI。DIZHITIAOJIANYUNXUDEHUA,YEKEQUXIAOXIECHENGSHEZHI,ZHANGBIANCAIQUDUICHENGSHEZHI,DUANBIANCHUCAIQUMAOGAN(SUO)ZHIHUTIXI。

                                    4 、结语

                                  棋牌大全下载安装   JIKENGGONGCHENGZUOWEIYIGESHEJIJIANSHE、KANCHA、SHEJI、SHIGONG、JIANCEDENGDUOZHUANYEDEXITONGGONGCHENG,YINGXIANGYINSUZHONGDUO,BENWENJIYUDUOGEGONGCHENGXIANGMUDECHENGGONGJINGYAN,CONGZHIHUSHEJIZHUANYEJIAODUFENXIKENGZHONGKENGDUIDITIEJIKENGZHIHUJIEGOUYINGXIANGDEGEZHONGBULIYINGXIANG,BINGTICHUYINGDUICUOSHI,DUIQIYUYIGUILEIZONGJIE,YIQIDUIYANTUGONGCHENGSHIYINGDUIGAILEIKUNNANSHITIGONGBANGZHU。

                                    参考文献

                                    [1]刘国彬,王卫东.基坑工程手册(第二版)[K].北京:中国建筑工业出版社,2009.
                                    [2]DB29-202-2010建筑基坑工程技术规程[S].
                                    [3]龚晓南.关于基坑工程的几点思考[J].土木工程学报,2005,38(9):99-102.
                                    [4]韩同春,谢灵翔,刘振.坑中坑条件下基坑有限土体的被动土压力计算[J].岩土力学,2018,39(12):4404-4411.
                                    [5]杨敏,张俊峰,王瑞祥.坑中坑挡土墙变形内力分析[J].岩石力学,2016,37(11):3270-3274
                                  棋牌大全下载安装   [6]孙九春.基于土压力平衡设计的地铁预留十字换乘节点车站施工方案研究[J].施工技术,2017,46(22):105-107.

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