大量涌水、渗水隧道施工.doc

上传人:本田雅阁 文档编号:2041877 上传时间:2019-02-07 格式:DOC 页数:9 大小:107.51KB
返回 下载 相关 举报
大量涌水、渗水隧道施工.doc_第1页
第1页 / 共9页
大量涌水、渗水隧道施工.doc_第2页
第2页 / 共9页
大量涌水、渗水隧道施工.doc_第3页
第3页 / 共9页
亲,该文档总共9页,到这儿已超出免费预览范围,如果喜欢就下载吧!
资源描述

《大量涌水、渗水隧道施工.doc》由会员分享,可在线阅读,更多相关《大量涌水、渗水隧道施工.doc(9页珍藏版)》请在三一文库上搜索。

1、yuan, an increase of 17.5%; local government general budget revenue of 500 million Yuan, . Painting, model culture creates new Ma Church community, creating Lake scenic spot culture education base, received high evaluation from provincial and municipal discipline Inspection Commission, the peoples d

2、aily special report. Constantly promote independent Commission against corruption culture construction to rural extends, created established Dahlin rural industry Park independent Commission against corruption culture positions, formed has a support service low double excellent of members lead team,

3、 constantly perfect and established Park funds assets management, and village audit supervision, and villagers democratic financial, system, strengthening Park party, and Chief, and financial, full public, powerful to guarantees has new rural construction, by city rural style clean government inspec

4、tion unit led of height evaluation. Through the implementation of honest and clean government cultural construction, and effectively educate the broad masses of party members and cadres and consciously regulated behavior and discipline, honesty in politics and culture to create a good atmosphere and

5、 fresh development environment. Although we in implement implementation independent Commission against corruption guidelines aspects made has must effectiveness, but away from superior of requirements also exists must of distance, main performance for: a is system enough sound, education, and superv

6、ision, and prevention, and punishment, aspects long-term mechanism also enough perfect, especially in enrollment bid work regulatory aspects also needed strengthening; II is regulatory supervision exists lost of Yu wide, and lost of Yu soft, investigation illegal disciplinary case of efforts also ne

7、eded strengthening, individual sector and cadres also different degree exists treat gift, not to benefits not do, and mess do of phenomenon; Three for honest work is the new situations and new problems in finding timely enough, treatment measures are not strong enough. To solve these problems, we wi

8、ll proceed from the following five aspects of rectification, make sure to implement the provisions of the code. (A) deepening the learning, enhance the consciousness of honesty in politics. To create event as an opportunity to Excel and learning party, further increasing the governance capability an

9、d advanced construction, reinforced rules of the broad masses of party members and cadres awareness, sense of responsibility, sense of honor, improve working ability and level of scientific development. Should make full use of meetings, in particular central group learning opportunity, further stren

10、gthening the study and education of the code, the intensive warning education, education the majority of party members and cadres known fear, knew fear, honesty in politics of tension the strings, consciousness and enhancing the implementation of the initiative. Also, pay attention to apply what the

11、y have learned, consciously study results into planning work, new ideas,http:/www.c- 大 量渗水、涌水隧道施工一、 大量涌水隧道施工 1施工方法 运用新奥法原理,沿隧道开挖轮廓线(含底部)按轴向辐射状布孔(开挖面中心也布孔),进行全断面全封闭深孔注浆固结止水,使 隧道周边及开挖面形成一个堵水帷幕(加固区),切断地下水流通路,保持围岩稳定,增强施工安全。 2施工工艺(1) 施工程序(见施工程序图)(2) 超前地质预报 对于构造复杂、水量丰富的地层,必须准确预报工作面前方2025M范围的工程地质和水文地质情况,以便

12、为制定施工方案和确定注浆参数提供依据。 钻孔方法:利用液压钻孔台车或YQ-100A施钻深孔,在拱顶、起拱线和隧道中下部位各钻76mm孔,孔深超出注浆段5m左右。预报内容:预测工作面前方注浆段长度范围的地质构造和岩性、地下水出露位置和水量大小,以及围岩变化情况。预报方法:采用钻眼排碴取样分析,记录钻速、水质水量变化情况以及开挖后的岩面观测素描,综合判断预报前方水文、地质条件。 (3)钻孔作业 封堵墙(止浆墙)施工:首先按照注浆设计施工封堵墙,封堵墙设于开挖面后端,封堵墙厚0.81.0m,用C20砼灌注一次成型。 布孔:由测工站在工作平台上,用红油漆在掌子面上按设计准确画出钻孔位置,标注编号。钻孔

13、: A钻孔时台车大臂必须顶紧在掌子面上,以防止过大颤动而影响施钻精度。 B钻机开孔时钻速宜低,钻深20cm后转入正常钻速。C第一根钻杆钻完后,凿岩机与钻杆脱离,使用联接套接第二根,依次接杆直至钻到设计深度。 D.钻孔深度达到设计要求后,凿岩机后退带出钻杆,人工用卡或大扳手卡紧前杆,凿岩机反转,松开连接套卸下钻杆,按同样方法依次拆卸钻杆退出孔外。E注浆孔角度参数: 仰角、俯角、左偏角、右偏角均控制在最小3、最大26内。 开孔孔径及深度:注浆孔用100钻头开孔,孔内放置长36m的86钢管(或橡胶止浆塞管)做孔口管,掏孔清碴时用76钻头。注浆段长度为20m一环。 钻孔深度控制:台车大臂按设计布孔位置

14、点对正,用简易垂球量角器测钻杆仰角,调整至设计角度,并在钻杆上安装导向指示器,控制钻孔偏角。 台车钻孔工作参数:凿岩台车钻孔作业的推进压力2.54.0MPa,回转压力5.06.0MPa,冲击压力1920MPa。 (4)注浆作业 注浆材料: 水泥:用425号以上的普通硅酸盐水泥,质量应符合标准。 水玻璃:用出厂浓度4245B,比重1.421.45,模数2.42.8的水玻璃原液。 拌合水:水质应符合铁路砼及砌石工程施工规范中的各项规定。 配合比控制:水灰比(W/C)为0.8;水玻璃稀释浓度为2535B;双液体积比(C/S)为1:0.50.7。 凝胶与凝结时间控制:为满足浆液扩散半径的要求,采用凝结

15、时间为:一般地段3分钟,富水地段12分钟。 施工控制分以下三种: A水灰比固定,水玻璃浓度不变,变换双浆比例。当水玻璃溶液所占比例由小到大,凝胶时间则由长到短,初、终凝由慢到快。 B水玻璃浓度不变,双液比例固定,变换水灰比。当水灰比由小到大,凝胶时间由短到长,初、终凝由快到慢。 C水灰比不变,双液比固定,变换水玻璃浓度。当水玻璃浓度由高到低,凝胶时间由短到长,初、终凝由快到慢。 注浆:连接注浆管路,用注浆泵先压水检查管路是否漏水,设备状态是否正常,然后再做压水试验,以冲洗岩石裂隙,扩大浆液通路,增加浆液冲塞的密实性,核实岩石的渗透性。 对于富水断层破碎带清孔后,先压水泥浆液,再压CS双液浆。

16、标定注浆泵上电接触点压力表的最大压力指标,泵压后观察压力变化及水泥浆和水玻璃的消耗数量。 记录注浆时间和注浆量。 注浆达到标准后,打开三通混合器的减压阀排浆,卸下混合器换注另一孔。 注浆结束后,拆卸各注浆器件,全部清洗干净,并对注浆泵进行检查保养。 作业方式: 注浆方式采用前进式或全孔一次压入式。钻孔过程中未涌水的,就一钻到底,全孔一次压入式注浆;在钻孔过程中,如发现有水,即停止钻孔,采取注一段钻一段的前进式注浆,直至达到设计段长位置。 在水压、水量较大的情况下,还可采用分层泄水减压、分层注浆方式。即下层管注浆,中层管放水;中层管注浆,上层管放水,这样逐层抬水,把水排挤到拱顶以上规定的止水固结

17、圈以外。 注浆顺序为由下而上,由里向外。 注浆参数: A注浆压力及单孔扩散半径: 注浆压力一般为地下水静水压力的23倍,考虑到岩层裂隙阻力,初始压力3MPa,终压45MPa。单孔浆液扩散半径4m。 B注浆速度: 钻孔出水量大于50L/min时,注浆速度取80100L/min。钻孔出水量等于050L/min时,注浆速度取6080L/min。C注浆扩散范围:注浆有效范围为开挖轮廓线外4.0m(塌方段为5.0m)。 D注浆量: 按注浆范围内围岩体积的5%左右考虑,实注量由钻孔压水试验确定。(单孔注浆量V=11m3,参考值)。 3劳动力组织 深孔超前预注浆工序多,要求工序衔接紧凑,因此施工组织安排要合

18、理,使各道工序协调动作。 作业工序为四大项:钻孔、运料、配料、注浆。每班施工作业人员29人,劳动力安排见下表。序号作 业 内 容人 数备 注1注浆孔司钻22接钻杆,安孔口管、接注浆管43操作注浆泵,接电和维修34调释水玻璃,拌水泥浆35装、运料,卸料96运料汽车司机,值班汽车司机37质量安全检查18测量19试验110技术指导工程师111指挥112合计29 4机械设备配置 (1)主要注浆配件 制作注浆孔口管,管长3m、6m两种,管尾焊接联接套,联接套长56mm,内径90mm,外径98mm,它的另一头带有梯形螺纹丝扣,也可用止水浆塞做注浆管,止浆塞采用自制橡胶止浆塞。 羊角式注浆嘴套帽 注浆嘴套帽

19、内口径螺纹能与孔口管尾外螺纹扣套接。帽头上钻两个孔,接成半角式接头,接头直径30mm,长85mm,与三通混合器连接。 三通混合器 三通混合器外形尺寸92mm92mm62mm,为逆止阀型,有4个孔,其中2个内径为28mm的螺纹孔接注浆管的入口,有一内径为30mm螺纹孔为出浆口,一个减压排浆口。逆止阀使双液混合后不能返流,直接流入羊角注浆嘴里。 注浆孔口管顶进联接套 顶进联接套尺寸和注浆嘴套帽相同,在帽上套焊一个钎尾套,接在钻孔台车的凿岩机上。注浆管25高压胶管长5m和10m,每一台注浆泵长短各配2根。25无缝钢管管路配长3050m,水泥浆和水玻璃浆液各一条管路。 钢管连接用钢制管节对接,高压胶管

20、与钢管连接配件为快速接头或缩头锁接。 5质量控制要点 (1)一次注浆段长度不大于20m; (2)注浆帷幕厚度不小于4.0m;(3) 堵水率不低于90%; (4)注浆结石体7天的单轴抗压强度不小于5MPa。 6安全措施 (1)地质超前预报和监控量测在施工中贯彻始终。 (2)施工排水沟要及时疏排,严防积水。 (3)针对富水断层破碎带深孔注浆固结止水施工的特点和要求,制定安全实施细则。 (4)加强全员安全意识教育,坚持安全第一的思想,不盲目追求进度,以防止塌方。 (5)要配备少量聚胺脂材料,作为突水应急堵漏时用。 (6)注浆作业人员戴口罩、眼镜和软手套,以防止水泥粉尘和水玻璃溶液对人体造成伤害。(7

21、)要有良好的照明条件。施工程序图见下页:二、大量渗水隧道施工 1施工方法 整治隧道施工渗水,采用聚氯乙烯(PVC)塑料板,即在初期支护与模筑砼衬砌之间铺一层PVC板,使衬砌表面达到干燥的要求。2施工工艺 准备工作 APVC防水板的质量检查检查是否有变色、波纹(厚薄不均)、斑点、刀痕、撕裂、小孔等缺点。 B用特种铅笔在PVC防水板边缘上绘出焊缝搭接线,搭接线距板边10cm。 CPVC防水板拱部、边墙分段铺设,拱部划出中线,并对称卷起备用。 D工作台就位:工作台由万能杆件拼装,接通电源,切断钢丝网露头,对超挖空施 工 程 序 图施工设计图施 工 准 备地质超前预报注浆配合比试验与设计计注浆站布置注

22、浆配件加工钻孔:钻孔接杆退杆注浆:接管试压压浆注浆检查:堵水率90%;浆液扩散范围从开挖轮廓算 起4m 不合格 开 挖 合格超前支护衬 砌洞要挂网回填砼。 固定PVC防水板 每环PVC防水板拱部与边墙分别铺设,先将拱部PVC防水板中线重合隧道中线,并及时在PVC防水板两边,离边缘5cm,间距0.5m,进行锚定,边墙铺设从起拱线开始,板边固定点距边缘5cm,间距1m,向下展开。防水板当中的锚固点布置:沿横PVC防水板施工程序(见下图)1 工作台架就位;2 接通电线路;3烧焊锚杆及铁丝网断头;4如有超挖洞,应编铁丝网及回填;5拱顶划出隧道中线,第一次铺第一环时,应划出垂直隧道中线的横断面线1 塑料

23、板质量检查;2 划焊缝搭接线;3塑料板分拱部、边墙两段截取,将拱部的对称卷起。 洞外任务 洞内任务准备工作钻孔清孔放胀管塑料板对位穿孔垫圈放塑料板上再穿螺钉螺钉进塑料胀管上紧固定塑料板上弹装钉枪口放垫圈射击 用射钉枪 用电锤 焊接塑料板搭接缝焊 缝 补 强质 量 检 查结 束移工作台架断面方向间距为0.51.0m,沿隧道轴线方向为1.0m,梅花形布置。 焊接PVC板搭接缝 搭接缝的焊接工作要超前于另一边。 焊缝补强 焊缝有不符合质量要求时,及时进行修补处理。 3劳动力组织 PVC防水板施工每班28人,分边墙与拱部两组,其分工如下: 班长 2人 锚固 6人 焊接 12人 辅助工 8人施工机具配备

24、见下页:4施工工具配备见下表名 称型 号单 位数 量备 注射钉枪SDTA301型台3电锤回ZIC16型台3电烙铁220V/150W把12调压器1KVA台6铜刷46排刷把12小锤把3螺丝刀把3锥子把3卡丝钳把3剪刀把3万能表个1试电笔支3工具袋个15.质量控制要点 (1)固定防水板时,要将防水板放松,不可绷得太紧,根据岩石基面情况留够富余量,使二次模筑砼挤压后,防水板与喷砼层表面自然密贴。 (2)两防水板间的搭接宽度10cm。 (3)用电锤固定防水板时,由于塑料胀锚螺栓直径为42mm,所以选用直径8mm的钻头钻眼,孔深4050mm。 (4)防水板焊缝宽度不小于1cm,焊接电压110V,最高不得超

25、过130V。 (5)用电烙铁焊接防水板时,烙铁头在两塑料板间均匀移动,同时在上层防水板之上用手指均匀用力推挤,以防水板焊缝间挤出塑料熔液为最佳。 (6)抽出烙铁头时,需将其上残留的熔融塑料刷掉。 6安全质量措施 (1)为保证铺设PVC板的平整,隧道开挖采用光面爆破,喷砼后要达到隧道轮廓线圆顺整齐。 (2)铺设防水板前,先将边墙基础灌注好,严禁在已铺设防水板处进行爆破作业。 (3)喷射砼表层有淋水时,采取引、挡、排、遮等措施,保证焊接时无滴水浸入。 (4)射钉枪或电锤,都要垂直于岩层面,同时防水板上要加垫圈。 (5)焊接开始前,电烙铁需在小块塑料板上试温,能使塑料板熔化时才能焊接,停焊时应及时切

26、断电源。 (6)用电烙铁进行焊缝补强时,要防止烙铁头将下块防水板烫出沟槽,影响防水效果。若发现有烤焦变色或焊穿等现象时,要及时进行补贴处理。 (7)隧道内各洞室铺防水板时,均须自上而下,从外向洞室内展铺,并注意正洞的防水板应搭接在洞室防水板里面,并在正洞与洞室边缘增加固定点。 (8)在模筑砼施工时,砼不能直接冲击防水板,震捣器不得接触防水板。new measures to promote work, the courage to take responsibility, dare to break hard to ensure district, Government decisions an

27、d arrangements to implement. (B) strengthening supervision, severely punish acts of violation. One is to open the channels of supervision. Vigorously promote the party affairs public, open, widely accepted supervision by the masses, pay attention to social groups and public opinion supervision, the

28、powerful force formed to urge party members and leading cadres properly exercise their powers. Second, strong supervision and inspection. Democratic life into full play, important briefings, reports related to personal matters and evaluation of cadres study of inner-party supervisory system, a compr

29、ehensive grasp of guidelines for the implementation of the independent Commission against corruption-related cases of leading cadres of party members, focus on strengthening key areas of project selection, funding, officials monitor, detect and rectify the problem, promote honesty in politics. Third

30、, strengthen disciplinary investigation. Seriously the implementation of JI .Recently, the County leading bodies at the county level to carry out three trees practice, which is to improve the governing ability and promoting the development of XX effective measure. I carefully follow your deployment

31、requirements, and actively participate in the three trees campaign. Read Group, prepared by the Department in the near future of the ideological and political construction of leading cadres in the city reader, read the relevant information, larger harvest, inspired. I think the ability of repelling

32、is to strengthen the partys governing capacity in questions of the construction of meaning, an important topic remains in front of party members and cadres at all levels, we need to further explore and ponder. The ability of repelling the name suggests, is asking party members and cadres at all leve

33、ls in particular, leading cadres at all levels, not only ourselves, establish a correct concept of the independent Commission against corruption, political integrity, self-discipline, rejection of corruption, made for the people, pragmatic, honest leadership, and strengthen the sense of responsibili

34、ty, earnestly implement the responsibility of uncorrupted, implementation of the baolian anti-corruption measures to ensure the realization of business-building, construction of a win-win situation. Next, I combined with their thinking, experience and contact XX practical, on how to enhance the abil

35、ity of repelling, on four aspects of cognition. Irregularities, please comment. First, the construction of the propulsion system, and enhance the system of corruption since the founding of our party, have been thinking about tackling corruption. Currently, democratic legal system, management system and supervision mechanism is not perfect, administrative acts are not very standardized, Enterprise behavior and market behavior, corruption presents a diverse, pluralistic, complex trends, this shift the struggle between the two, will accompany- 9 -

展开阅读全文
相关资源
猜你喜欢
相关搜索

当前位置:首页 > 其他


经营许可证编号:宁ICP备18001539号-1