大独山隧道顺层偏压专项施工方案(1).doc
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1、Manipulator is now used as a industrial robots in use, the control objectives often appear often in industrial automation. Industrial automation technology has gradually matured, as mature a technology line has been rapid development in industrial automation as a separate subject. Manipulator applic
2、ation began to filter into welding, logistics, mechanical processing, and other industries. Especially at high or very low temperatures, full of poisonous gases, high radiation case, robot in similar circumstances showed great use also brings great convenience to the staff. Precisely because of this
3、 robot to get peoples attention began to be a high degree of development. Labor rates, working conditions, labor intensive aspects of promoting development. Both at home and abroad to develop the PLC (programmable logic controller) is in various special circumstances and under special conditions set
4、 for mechanical devices. Now turned on the development of the microelectronics automatic control technology and the rapid development of the trains, the success of PLC hardware software and simulation control win big and successful development, now continues to develop as a factory automation standa
5、rds. Because robots are good development of the technology makes a good optimization of productive capital, and robot shows this unique advantages, such as: has good compatibility, wide availability, hardware is complete, and programming that can be mastered in a short time, so in the context of ind
6、ustrial PLC applications became ubiquitous. Manipulator in many developed country agriculture and industry has been applied, such as the use of mechanical harvesting large areas of farmland, repeated operations on the high-speed line that uses a robotic arm, and so on. Today, the high level of autom
7、ation combined with restrictions on the manipulator development level is slightly lower than the international. The design is mainly arm welding machine by PLC Automation control. This of design let designers on in school by learn of has a must of consolidation, understand has some usually didnt opp
8、ortunities awareness in world range within some leading level of knowledge has has must awareness, hope designers can in yihou of design in the can success of using in this design in the proceeds of experience 1.2 manipulator in both at home and abroad of research profile automation mechanical arm r
9、esearch began Yu 20th century medium-term, after years with with computer and automation technology of development, Makes mechanical arm on the Grand stage of industrial automation and shine, gradually became an industrial evaluation standards, and its importance can be seen. Now original robotic ar
10、m spent most of mass production and use on the production line, which is programmed robotic arm. As the first generation of manipulator position control systems main features, although not back several generations that can detect the external environment, but can still successfully complete like wel
11、ding, painting, delivery as well as for materials simple movements. Second generation mechanical arms are equipped with sensors and manipulators have the environment there is a certain amount of sense, when the mechanical arm is to use the program as a basis. Difference is that the robot begand中铁二十局
12、集团有限公司沪昆9标 大独山隧道顺层偏压专项施工方案大独山隧道顺层偏压专项施工方案一、编制依据(1)铁路混凝土工程施工质量验收标准TB10424-2010;(2)铁路混凝土工程施工技术指南铁建设【2010】241号;(3)高速铁路隧道工程施工技术指南铁建设【2010】241号;(4)高速铁路隧道工程施工质量验收标准TB10753-2010;(5)大独山隧道设计图 第二册 共四册;(6)大独山隧道设计图 第三册 共四册;(7)时速350公里双线隧道辅助施工措施及施工方法;二、编制范围根据设计图纸顺层偏压:D1K864+450D1K864+654倾向线路左侧,隧道右侧边墙顺层。根据现场施工揭示,需
13、变更的也适用此编制方案。三、工程概况工程地质概况: 大独山隧道位于关岭普安区间,起讫里程为D1K852+772D1K864+654,全长11882m。全隧共设置2座横洞1座贯通平导,均采用无轨单车道。在D1K856+500线路左侧设置长约1043m的一号横洞,在D1K861+500线路左侧设置长约1361m的二号横洞,贯通平导长11829m,起讫里程为PD1K852+768PD1K864+597,平行设置于线路前进方向右侧,与左线线路中线的距离为35m。隧道洞身主要穿越白云岩、灰岩、泥岩、泥灰岩、泥岩夹砂岩等地层,其中可溶岩段长8753m。四、施工措施顺层偏压:D1K864+450D1K864
14、+654段倾向线路左侧,隧道右侧边墙顺层。D1K864+639D1K864+654段为斜切洞门,明挖法施工。D1K864+639D1K864+480段为Vc型复合衬砌,台阶法加临时仰拱。c级围岩初期支护:全环设置工22a的拱架,规格:工22a拱架,间距0.6m,拱部140设置锚杆25x7中空锚杆L=4.0m,间距为1.0mx1.0m,长度为4.0m/根,拱部140以下设置22砂浆锚杆L=4.0m,间距为1.0mx1.0m,长度为4.0m/根。拱部及拱墙部位设置8的钢筋网片,网格间距为20cm20cm。拱部及拱墙喷射混凝土厚度28cm的C30混凝土,仰拱喷射混凝土厚度为28cm的C30混凝土。暗
15、洞处拱部设置108大管棚,间距0.4m,共50根,每35m/根。拱部设置42小导管L=4.0m,环向间距0.4m,共50根,纵向每2.4m/环,每35m/根。D1K864+480D1K864+450段为Vb型复合衬砌,台阶法加临时横撑。b级围岩初期支护:全环设置工20b的拱架,规格:工20b拱架,间距0.6m,拱部140设置锚杆25x7中空锚杆L=4.0m,间距为1.2mx1.0m,长度为4.0m/根,拱部140以下设置22砂浆锚杆L=4.0m,间距为1.2mx1.0m,长度为4.0m/根。拱部及拱墙部位设置8的钢筋网片,网格间距为20cm20cm。拱部及拱墙喷射混凝土厚度28cm的C30混凝
16、土,仰拱喷射混凝土厚度为28cm的C30混凝土。拱部设置42小导管L=4.0m,环向间距0.4m,共50根,纵向每2.4m/环,每35m/根。小导管注浆采用水泥净浆1:1的水灰比。五、施工工艺流程浅埋段施工前需先进行地表处理后,才能进行暗洞施工。进、出口段需施工完成永久截水天沟、开挖边仰坡面及洞口预加固后方可进行暗洞施工。1、施工前准备工作在施工前由项目部总工组织全体技术人员及各级管理人员对浅埋段原地物、地貌以及裸露岩体进行实地踏勘,勘查结果与设计图纸进行比对,澄清有关技术问题。组织测量组对该浅埋段进行地形测绘,绘制地形图。并对参加的施工人员进行技术交底和培训。地表清理通过施工放样,边仰坡边桩
17、(地表处理区段中边桩)后,挖除不小于30cm保护土层,清除地表耕植土、植被草皮、淤泥等杂质,当原始地面坡度陡于1:5时,地表应开挖台阶,台阶宽度不得小于1m。施作永久截水天沟永久截水天沟在地表清理完成后进行,采用C20混凝土,为避免山洪冲刷,应在水沟入水口及出水口处采用M10浆砌片石铺砌。边仰坡喷射C20混凝土12cm,设置砂浆锚杆4.5m/根,呈梅花型布置1.5*1.5m。2、明洞与暗洞分界处大管棚设置:超前支护管棚设计参数:导管规格:外径108mm,壁厚6mm;孔口管:热轧无缝钢管,外径133,壁厚5mm;管距:环向间距40cm;倾角:外插角13为宜,可根据实际情况作调整;注浆材料:1:1
18、水泥浆或M20水泥砂浆;设置范围:拱部140范围;管棚单根长度:根据施工图确定。管棚数量:50根一环。管棚施工工艺管棚施工主要工序有施作套拱;搭钻孔平台、安装钻机;钻孔;清孔、验孔;安装管棚钢管;注浆。工序技术要求高,工艺复杂,施工工艺详见下图。 管棚施工工艺流程图1) 导向墙或管棚工作室施工当为洞外开始施作管棚时,采用导向墙做为管棚施作平台。导向墙采用C20混凝土,在开挖轮廓线以外拱部150范围内施作,断面尺寸为1m1m,导向墙内设2榀I18工字钢架,钢架外缘设133壁厚5mm导向钢管,钢管与钢架焊接。钢架各单元由连接板焊接成型,单元间由螺栓连接,接头处焊缝高度:腹板9mm,翼缘12mm。孔
19、口管作为管棚的导向管,它安设的平面位置、倾角、外插角的准确度直接影响管棚的质量。用全站仪以坐标法在工字钢架上定出其平面位置;用水准尺配合坡度板设定孔口管的倾角;用前后差距法设定孔口管的外插角。孔口管应牢固焊接在工字钢上,防止浇筑混凝土时产生位移。导向墙布置图见附件。当大管棚是在洞口施作,为保证大管棚施工的空间,需要开辟大管棚工作室。按单节导管长6米,钻机机身及主动钻杆共2.0m,则工作室的长度应为800cm,扩挖较设计设计断面大。2)施作导向管工作室开挖、支护完成后,继续向前开挖2榀比设计断面大25cm左右的断面,尽快初喷,封闭掌子面,厚度4cm,形成止浆墙,架设钢架,采用全站仪以极坐标法放样
20、法,在工字钢架上定出其平面位置;用水准尺配合坡度板设定孔口管的倾角;用前后差距法设定导向管的外插角,将导向管焊接在钢架上。导向管与钢架高差可通过钢垫板实现调节。焊接应牢固,使钢架与导向管形成整体,并迅速喷射混凝土形成套拱。导向管长度1m,采用外径133mm、壁厚5mm热扎无缝钢管。3)搭钻孔平台安装钻机 钻机平台可用方木或钢管脚手架搭设,搭设平台应一次性搭好,钻孔由钻机从低孔位向高孔位进行。 平台支撑要着实地,连接要牢固、稳定。防止在施钻时钻机产生不均匀下沉、摆动、位移等影响钻孔质量。 钻机定位:钻机要求与已设定好的孔口管方向平行,必须精确核定钻机位置。用全站仪、挂线、钻杆导向相结合的方法,反
21、复调整,确保钻机钻杆轴线与孔口管轴线相吻合。4)钻孔 为了便于安装钢管,钻头直径采用127mm。 地质较好的情况下可以一次成孔;钻进时产生坍孔、卡钻,需补注浆后再钻进。 钻机开钻时,可低速低压,待成孔1.0m后可根据地质情况逐渐调整钻速及风压。 钻进过程中经常用测斜仪测定其位置,并根据钻机钻进的现象及时判断成孔质量,并及时处理钻进过程中出现的事故。 钻进过程中确保动力器,扶正器、合金钻头按同心圆钻进。 认真作好钻进过程的原始记录,及时对孔口岩屑进行地质判断、描述。作为开挖洞身的地质预探预报,作为指导洞身开挖的依据。5)清孔验孔 用地质岩芯钻杆配合钻头(127 mm)进行来回扫孔,清除浮渣至孔底
22、,确保孔径、孔深符合要求、防止堵孔。 用高压气从孔底向孔口清理钻渣。 用全站仪、测斜仪等检测孔深,倾角,外插角。6)安装管棚钢管 钢管应在专用的管床上加工好丝扣,棚管四周钻8出浆孔(靠掌子面45m的棚管不钻孔);管头焊成圆锥形,便于入孔。 棚管顶进采用大孔引导和棚管机钻进相结合的工艺,即先钻大于棚管直径的引导孔(127mm),然后可用10t以上卷扬机配合滑轮组反压顶进;也可利用钻机的冲击力和推力低速顶进钢管。 接长钢管应满足受力要求,相邻钢管的接头应前后错开。同一横断面内的接头数不大于50%,相邻钢管接头至少错开1m。7)注浆安装好有孔钢花管、放入钢筋笼(有的情况下)后即对孔内注浆,浆液由ZJ
23、-400高速制浆机拌制。注浆材料:注浆材料为水泥浆或M20水泥砂浆。采用注浆机将砂浆注入管棚钢管内,注浆压力一般为0.61.0MPa,具体浆液配合比和注浆压力由现场实验确定,当无吸浆量情况下,持压15min后停止注浆。注浆量应满足设计要求,一般为钻孔圆柱体的1.5倍;若注浆量超限,未达到压力要求,应调整浆液浓度继续注浆,确保钻孔周围岩体与钢管周围孔隙充填饱满。注浆时先灌注“单”号孔,再灌注“双”号孔。四、台阶法加临时仰拱(横撑)施工工艺管段内大独山隧道出口之外浅埋顺层偏压段均采用台阶法加临时仰拱(横撑)方法进行施工,台阶法加临时仰拱(横撑)法施工工艺如下。1)目前隧道的施工方法有多种多样,地质
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