暗涵变点隧洞施工方案 文档.doc
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1、暗涵变隧洞施工方案1.工程概况:K13+315K13+395段,设计为暗涵,由于“资三路”在2011年12月要竣工,工期紧,任务重。资阳市九曲河整治引水工程也相继开工,两工程形成交叉施工。经雁江区政府、市交通局、市水务局协调决定该段80m暗涵施工改为隧洞施工,对该段引水工程引起工程费用增加,施工难度增大,我公司工程技术人员多次到现场踏勘,结合工程地质资料该段地面以下为强风化泥岩,地表层下粘土4m强风化层12m,强风化岩下层为页岩,该段隧洞拱顶以上全部属粘土,强风化泥岩。(强风化泥岩层全部被地下水侵泡,岩层非常软弱)我公司施工方案如下请设计、业主指示。2.施工方案:2.1 8#暗涵K13+155
2、K13+225,共70m长,该段暗涵太短,施工场地狭窄,根据钻探资料地质情况较好,暗涵埋深较深,我公司建议该段暗涵改为隧洞施工。方法是采用帷幕灌浆,先帷幕灌浆隧洞拱顶以上基岩,再帷幕灌浆基岩以上地表黏土,然后进行隧洞开挖,支护(开挖支护方法同后续方法)。2.2 9#暗涵K13+315K13+445共130m,资三路路基桩号为K13+315K13+395共80m和K13+395k13+445共50m分为两段,两种施工方法。2.21 降水井:在K13+395右边离隧洞轴45m打一降水井。井深低于隧洞底板高程45m,井径50cm。井打好后根据地下水流量确定安装电动潜水泵进行抽水。2.22 开挖: 从
3、K13+395K13+430段进行掘进开挖,自卸汽车运土,运至8#暗涵下一空地料场,开挖至泥岩高程,在底部两侧开挖23m3集水坑,进行地下水及隧洞掘进开挖面的地表水汇集抽排。2.23 洞口仰坡面:在仰坡面做钢筋砼横重梁式挡墙(使资三路路基回填土石方不滑动)然后再进行仰坡面支护,仰坡面支护方法先在仰面进行50mm厚C20砼素喷,素砼喷射后进行25 ,L=4m,间距1000mm锚杆和8 200200钢筋网片,钢筋网片焊接在锚杆上,再进行10cm厚C20砼进行二次喷砼,开挖深度2m一层,开挖一次进行前工序一次。2.24 固结灌浆;2.241待开挖至底板高程后,拱顶开挖线以上进行固结灌浆,拱顶开挖线以
4、上进行钻孔,孔径42mm,孔深6m,孔距为1000X1000mm梅花型布置,在采用32钢管做成灌浆管,在钢管四周钻6孔洞,间距50cm梅花布孔,将灌浆管一端锯成三块,在锤击钢管使灌浆管一端形成锥形。2.242 将制好的灌浆管击入钻孔中,再将管孔口用堵漏剂封闭管孔口。2.243再进行灌注水泥浆,水泥浆拌制加水玻璃外加剂,灌浆压力为0.098Mpa.2.25 管棚施工;2.251在洞口制作内径大于隧洞开挖断面的工字钢拱顶架,工字钢拱架采用16#工字钢。在拱架工字钢内钻45mm孔。拱架制作安装在洞口。2.252在采用42风钻杆进行钻孔,孔深3m,孔距1015cm,长度为拱架圆弧段2.253孔钻好后将
5、38钢管(外径38厚壁管)击入孔内,再进行灌注水泥浆。2.26 开挖机械: 开挖采用100型掘进机开挖,每次掘进深度6070cm.2.27 拱架安装:开始第二榀拱架安装,拱架间距50cm,再用223040cm的钢筋连接拱架,使钢拱架成一整体,钢筋与拱架焊接必须牢固。在进行第三、四榀拱架安装,第五榀拱架制作安装同第一榀,成循环作业,掘进至4.55m时,又进行第二次固结灌浆成循环。2.28 支护: 掘进到56m时,进行一次C20砼喷护,将拱架全部封闭成为钢砼支护拱圈。2.29施工方案图: 资三路与9#暗涵开挖平面布置图I-I剖面图说明:1.拱架为16#工字钢 2.连接钢板和钢垫板采用10mm厚的钢
6、板 3.灌浆管为32 4.管棚钢管为38厚壁钢管2.3 K13+395K13+445段共50m.2.31 以城镇供水管为界,先施工上游段,待隧洞施工完成后进行城镇供水管上游段施工,先将上游段进行土方开挖,再进行页岩土工格栅回填压实,碾压回填到地面高程后,再进行城镇供水管下游地表黏土开挖,在进行页岩土工格栅回填压实至地面高程。第一层压实度为80%,第二层压实度为85%,第三层压实度为90%。2.32 帷幕灌浆,先帷幕灌浆上游段,将换填部分进行帷幕灌浆,然后再进行下部基岩部分进行帷幕灌浆,下游段同上游段,帷幕灌浆后必须进行灌浆试验,灌浆试验必须达到规范要求。2.33城镇供水管的保护,待上下游帷幕灌
7、浆完成后,在从水管下游至上游进行人工开挖,长2m,挖至持力层,然后采用M10水泥沙浆砌块石保护供水管,采用边挖边衬砌方法施工。2.34 帷幕灌浆后,再从下游隧洞完成本段开挖,然后再从K13+395开始往下游衬砌施工,方法同隧洞砼施工,本方案主是解决城镇供水管。2.35 K13+440处有一小溪沟,在城镇供水管上游段回填碾压结束后,用1000mm预制砼管从隧洞轴线左岸2030m通过供水管上游段埋至高速公路水沟,再施工供水管施工。资阳市九曲河综合整治引水工程C区施工(K13+155K13+445)段暗涵变隧洞施工方案四川省场道工程有限公司2011年8月(英文版 ) Two regulations
8、promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of comprehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen inner-party supervision of major initiatives
9、. The two regulations supporting each other, the adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard; around the party discipline, disciplinary ruler requirements, listed as negative list, focusing on vertical gauge,
10、 draw the party organizations and Party members do not touch the bottom line . Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process; the second part is the interpretation of the two fund
11、amental principles of the revision of laws and regulations in the party; the third part introduces two party regulations modified the main changes and needs to grasp several key problems; the fourth part on how to grasp the implementation of the two regulations of the party. and revised the necessit
12、y and revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines and column 1 by 2015 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of
13、 the whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation; follow the correct direction, grasp the limited goals, adhere to the partys leadership, to solve the masses of the people reflect a
14、 focus on the problem. The new revision of the and , reflects the partys 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the partys eighteen
15、years comprehensive strictly practice. (a) revised two regulations of the party need of in based on revised, the promulgation and implementation of January 2010, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly
16、 administering the deepening, has not been able to fully meet the actual needs. Content is too complicated, eight prohibition, 52 are not allowed to hard to remember, and also difficult to put into practice; the second is concisely positive advocated by the lack of prohibited provisions excessive, n
17、o autonomy requirements; the third is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and Criminal law and other laws and regulations repeat; the fourth is to clean the theme is not prominent, not for the existing problems, and is narrow, only needle
18、of county-level leading cadres above. is in 1997 based on revision, in December 2003 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the compre
19、hensive strictly administering the practice needs. One is Ji law, more than half of the provisions and criminal law and other countries laws and regulations Repetition; two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the aut
20、hority of Party Constitution of misconduct lack necessary and serious responsibility to pursue; third is the main discipline for the leading cadres, does not cover all Party members. Based on the above situation, need to and the two is likely to be more relevant regulations first amendment. By revis
21、ing, really put the authority of Party discipline, the seriousness in the party tree and call up the majority of Party members and cadres of the party constitution of party compasses party consciousness. (II) two party regulations revision process the Central Committee of the Communist Party of Chin
22、a attaches great importance to two regulations revision . Xi Jinping, general books recorded in the Fifth Plenary Session of the eighth session of the Central Commission for Discipline Inspection, on the revised regulations made clear instructions. According to the central deployment, the Central Co
23、mmission for Discipline Inspection from 2014 under six months begin study two regulations revision. The Standing Committee of the Central Commission for Discipline Inspection 4 review revised. Comrade Wang Qishan 14 times held a special meeting to study two regulations revision, amendment clarifies
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