cCD-08土钉墙喷锚支护监理细则.doc

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1、2016 learning implement to tube main leaders topic seminar spirit counselling material 2016 learning implement to tube main leaders topic seminar spirit counselling material March 7, XI General Secretary to I province delegation participate in considered and published has important speech, on XXX pr

2、ovince people for China revolution victory and Socialist construction made of contribution give has certainly, on I province past five years implementation focus strategy, and grasp focus industry, economic social development made of results give has certainly, Clarified the demands for development

3、of XXX, referring to both directions, tasks and issues, teaching methods, for the current and future development in Heilongjiang province, is of great practical significance and far-reaching historical significance. March 22 to 24th, provincial held has province tube main leaders topic seminar, prov

4、incial Secretary Wang Xiankui comrade in seminar opening province do has important speech, Wang Xiankui stressed: in-depth learning acquisition General Secretary of speech, is on XXX a political account, we must put learning implement XI General Secretary important speech spirit as major political t

5、ask, adapted and led economic development new normal, insisted to economic construction for Center not shake, implement implementation new development concept, weaknesses, and swagger grams short, and yangchangbuduan, Stimulate the endogenous dynamics, formation effect of EMU, firm implementation of

6、 the five planning, the development of key industries, open Dragon River comprehensive revitalization new journey, struggling to get out of a high quality, efficient, better structure and development road of revitalization of the advantages into full play. March 29 to 30th, the Committee organized a

7、 pipe major thematic seminar of leading cadres prefectural comrade Jia Yumei made an important speech at the opening ceremony. Jia Shuji stressed, full district upper and lower must to effective enhanced learning publicity implement implementation XI General Secretary important speech spirit of poli

8、tical consciously, and thought consciously, and action consciously and mission consciously, put learning XI General Secretary and provincial Secretary Wang Xiankui speech spirit as current primary political task, to more strongly of attitude, and more powerful of measures, and more full of drive pro

9、moted forest transformation development, struggled to out of forest transformation development new, ensure as scheduled achieved full built forest society of target. Today the County for convening this Conference, is to fully implement the arrangements of the provincial, prefectural, and is a major

10、political task. County-wide each of the party members and cadres must earnestly study, deeply understand, enter into the heart, done outside the heart, of the line armed with Jia, Secretary of spirit and mind, practice, work, below, I XX practical study Jia Shujis important speech spirit with you. A

11、wareness, deepen the County, General Secretary土钉墙喷锚支护监理实施细则 工程监理实施细则(土钉墙喷锚支护监理细则)编号:YCJ/CD-00 文件状态:版号:CD /08发放号码:编制:审核: 批准:发布:2003-08-26 实施:2003-09-26云南城市建设监理有限公司 发布20040720实施 校对:car air conditioning refrigeration system of maintenance first unit car air conditioning of overview teaching content: 1

12、car air conditioning history 2 car air conditioning of composition 3 car air conditioning refrigeration device of features teaching requirements: students through this unit of learning, should car air conditioning of system composition, and installation location has a perceptual of awareness, firm m

13、aster car air conditioning and other air conditioning different of unique features. Key and difficult point: 1, train the systemic understanding of automotive air conditioning components, macro-level understanding of the courses main technical requirements. 2, train students the ability to access, u

14、nderstand the latest development trend of automotive air conditioning. Experimental cognitive experimental unit of auto air conditioning parts automotive air conditioning refrigerating system and principle of the teaching contents: 1. the principle of compression refrigeration 2. teaching of automob

15、ile air-conditioning refrigerants and lubricants .Foundation and Foundation (JTG D63-2007) of the technical code for construction of highway bridges and culverts (JTG/T F50-201further clarify the transformational development, XI Jinping stressed that XXX has its advantages, also have their own board

16、s, key to focus on weaknesses, short swagger grams, yangchangbuduan, integrated effect of policy measures towards the target solid forward. This important statement for us to do a good job providing a dialectical thinking and the scientific method, fully embodies the dialectical unity of subjective

17、and objective law. We must speak to the spirit for guidance, and further deepen understanding, targeted to long Yang well, Hawk shelters make good short, released in full development potential. 一 . Potential and the big five short Board, that is, ecological environment, resources, water, economic de

18、velopment advantage advantage, advantage as policy overlap, cultural enrichment, and industrial boards, institutional weakness, short people short, short of funds and talent. From the perspective of ecological environment, our region as an important guarantee of national ecological safety, high fore

19、st cover, water, air and soil environmental indicators, such as the nature, is the development of green food and preserving pension ideal places, forest carbon sinks and other industries. From the perspective of the priority of characteristic resources, wild blueberry, Northern forest resources such

20、 as drugs, big snow, big wetlands, River and forest tourism resources, variety, large reserves of mineral resources such as molybdenum, lead and zinc, has translated into strong material conditions for economic advantage. Economic development out of the water, total more than 16 billion cubic meters

21、 of surface water resources and hydro-junction project of development prospects; recoverable reserves of high quality mineral water resources million tons, is the base of rare natural and pollution-free mineral water. Seen from the advantages of cultural enrichment, with Northern culture, and Xianbe

22、i cultures, Oroqen culture and a number of cultural resources, rock only found more than 1000 paintings, cultural industry development has great potential. From the perspective of policy overlap advantage, with the State Forestry Administration and the provincial government two channels of policy to

23、wards direct enjoyment of natural forest protection program, Western development, resource-based cities sustainable development and main function region construction national policy planning. As long as we put these resources to use and exploit the advantages of good, could give guanghui, snow, cold

24、 region and black Glebe into gold and silver, will provide strong support for forest development. (In addition to Jia Shuji mentioned advantages, XX we have in agriculture, water conservancy and other unique resources. Agricultural resources, 1.129 million mu of arable land throughout the County, da

25、 hinggan Ling was the only predominantly rural administrative districts, green planting area of 850,000 acres. Water resources, in a river over more than 180, many river hydropower development project conditions, rich in three five Luo and2003.05.18批准 2003.05.18实施目 录一工程概况(2)二编制依据(2)三目标分解(2)四土钉支护工程设计

26、监理(2)五施工监理(7)六施工监测(8)七审查竣工资料(9)八涉及的规范和标准()土钉墙喷锚支护监理细则一、工程概况(按工程实际情况编写)二、编制依据1、工程监理规划。2、监理合同、施工合同。3、公司体系文件。4、国家和地方现行相关法律法规和标准。三、目标分解四、土钉支护工程设计监理1审查设计内容及适用性。查阅工程地质勘察报告,确定是否可以采用土钉墙支护,土钉墙支护适宜于地下水位以上或经降水措施后的杂填土,普通粘土或非松散性的砂土,一般认为可用于N值在5以上的砂质土于N值在3以上的粘性土。设计内容应包括:a:土钉的平面和剖面尺寸及分段施工高度;b:土钉的布置方式和间距;c:土钉的直径、长度、

27、倾角及在空间的方向;d:注浆配合比,注浆方式,浆体强度指标;e:土钉抗拔力验算;f:土钉体稳定性分析;g:变形预测和可靠性分析;和:坡顶防护措施及现场监测。2审查设计原则与构造指标土钉墙支护一般用于基坑在18m以内的边坡,斜面坡为700900;土钉长度一般为开挖深度的0.51.2倍,其间距宜12m,土钉与水平面夹角宜为100200;土钉必须和平面层有效地连接在一起,常设有承压板和加强筋。喷射混凝土面层厚度宜为80200mm,常用为100mm。喷射混凝土强度等级不宜低于C20;喷射混凝土面层中应配钢筋网,钢筋网采用级钢筋610mm,间距150300mm。注浆材料宜用水泥净浆,强度不低于20Mpa

28、。3审查设计计算书应用条分法,对每个土体进行极限平衡分析,边坡失稳最小滑裂弧面安全系数K=式中:Ci第i条土滑动面上的粘聚力(kpa)Li第i条土条弧长(m)Wi第i条土自重力(kN/m)第i条弧线中点切线与水平线夹角;第i条土条滑动面上的摩擦角。土钉所受的土压力Ti(q+rHi)Kai2CSxSy式中:Ti第i个锚钉所受的土压力(kN)q坡上超载(kN/m2)R土的重度(kN/m3)Hi第i个高度的土锚钉(m)Kaitg2(4501/2);第i层qi的系数;Sx及Sy土钉水平及垂直间距(m)C土的粘聚力(Kpa)注:若有相应地质条件下的实际经验,此项可不作验算。土钉抗拔力应满足下式要求Tui

29、DLbifi125r0Tjk式中Tui第i个土钉滑裂面外的抗拔力(kN)D钻孔直径(m)Lbi第I层锚钉伸入破裂面外稳定区长度(m)fj锚体砂浆与土体间各层土的粘结强度(kN/m2),由试验资料确定,若无试验资料可按表取标准值。r0建筑基坑侧壁重要性系数。单根土钉受拉荷载标准值可按下式计算Tjkgeajksxjszjcos;式中:g荷载折减系数,tgtg2(450)式中:土钉墙坡面与水平面的夹角。eajk第j个土钉位置处的基本荷载标准值;sxj、szj第j根土钉与相邻土钉的平均水平、垂直间距;第j根土钉与水平面的夹角k土的内摩擦角标准值。土钉锚固体与土体极限摩阻力标准值土的名称土的状态Tfj(

30、kpa)填土1620淤泥1016淤泥质土1620粘土IC11830075IC1304005IC0754053025IC0553650IC0256573IC07580粉土e0.920400.75e0.94060e0.756090粉细砂精密2040中密4060密实6080中砂精密4060中密6070密实7090粗砂精密6090中密90120密实120150砾砂中密、密实130160锚体稳定区有效长度Lbi式中:Ti第I层土钉所受土压力(kN)Tt试验拉拔力(kN/m),Tt=D(jtgc)式中D钻孔直径K0安全系数,一般用1.5Lbi第I层稳定区内长度(m)土钉直径计算KTmaxAfptk 则AA

31、土钉有效截面积(mm2);Fptk土钉抗拉强度标准值(N/mm2)Tmax各层土中最大土压力。K安全系数(一般为1.5)土钉支护整体稳定性分析土钉支护的内部整体稳定性分析是指边坡土体中可能出现的破坏面发生在支护内部并穿过全部或部分土钉,土钉墙应根据施工期间不同开挖深度及基坑底面以下可能滑动面采用圆弧滑动简单条分法按下式进行整体稳定性验算:CikLiSS(Wiqobi)COSitgik+TnjCOS(jj)+1/2Sin(jj)tgikSrkro(Wi+qobi)Sini0式中:n滑动体分条数m滑动体内土钉数rk整体滑动分项系数,可取13ro基坑侧壁重要性系数wi第i分条土重,滑裂面位于粘性土或

32、粉土中时,按上覆土层的饱和土重度计算;滑裂面位于砂土或碎石类土中时,按上覆土层的浮重度计算;bi第i分条宽度cik第i分条滑裂面处土体固结不排水(快)剪粘聚力标准值ik第i分条滑裂面处土体固结不排水(快)剪内磨擦角标准值i第i分条滑裂面处中点切线与水平面夹角j土钉与水平面之间的夹角Li第i分条滑裂面处弧长S计算滑动体单元厚度Tnj第j根土钉在圆弧滑裂面处锚固体与土体的极限抗拉力,可按下式计算确定:TnjdnjfjLni式中:Lni第j根土钉在圆弧滑裂面外穿越第i层稳定土体内的长度fj土钉锚固体与土体极限摩阻力。qo基坑周边其它荷载。密集的土钉组成的复合土体,可将其视为重力式挡土墙,因此除内部安

33、全稳定外,尚须验算:抗滑动稳定及抗倾覆稳定。a.土钉墙的抗滑动稳定计算KH式中:KH抗滑动稳定安全系数Eax墙后主动土压力(KN)Fi假设墙底断面上产生的抗滑合力(KN)b.抗倾覆稳定性验算KQ=式中:抗倾覆力矩(W+qB)B/2SxW墙土的重量(HB),B为挡土墙厚度。Sx土钉水平距(m)。为倾覆力矩,则KQ安全系数。五、施工监理:1土钉施工工艺流程:按设计要求开挖工作面,修正边坡喷射第一层混凝土安设土钉(钻孔、插筋、注浆垫板等)绑扎钢筋网,留搭接筋,喷射第二层混凝土开挖第二层土方,如此循环。2喷射混凝土面层作业前要对机械设备、风、水管路和电线进行检查及试运转,清理受喷面,埋设好控制喷射混凝

34、土厚度的标志。喷射时,喷头与喷面应垂直,宜保持0.61.0m的距离。喷射手要控制好水灰比,保持混凝土表明平整,呈湿润光泽,无干斑或滑移流淌现象。喷射混凝土终凝2h后,要撒水养护,根据气温条件,一般养护37d。钢筋网宜在喷射一层混凝土后铺设,钢筋与坡面的间隙宜大于20mm。上下层钢筋网要搭接,长度为25倍钢筋直径。钢筋网与土钉锚固装置要连接牢固,喷射混凝土时钢筋不得晃动。3土钉施工按设计图的纵向,横向尺寸及与水平面夹角进行钻孔施工。注浆材料用水泥浆或水泥砂浆,水灰比宜为0.40.5。注浆管插到距孔底250300mm,为保证注浆饱满,在孔口设止浆塞,注浆压为12Mpa,充盈系数必须大于1。钻孔后应

35、进行清孔检查,对孔中出现的局部渗水塌孔或掉落松土应立即处理,成孔后应及时安设土钉并注浆。用于注浆的砂浆强度用707070(mm)立方试件经标准养护后测定,每批至少留取3组(每组3块)试件,给出3天和28天强度。土钉成孔过程中应做好孔记录,按土钉编号逐一记载取出的土体特征,成孔质量,事故处理等。应将取出的土体与初步设计时就认定的加以对比,有偏差时应及时修改土钉设计参数。喷射混凝土强度可用边长100立方试块进行测定,制作试块时应将试模底面紧贴边壁,从侧向喷入混凝土,每批至少留取3组(每组3块)试件。六、施工监测1土钉支护的施工监测至少应包括下列内容:支护位移的量测;地表开裂状态(位置、裂宽)的观察

36、;附近建筑物和重要管线等设施的变形测量和裂缝观察;基坑渗漏水和基坑内外的地下水位变化。在支护施工阶段,每天监测不少于12次;在完成基坑开挖、变形趋于稳定的情况下可适当减少监测次数。施工监测过程应持续至整个基坑回填结束、支护退出工作为止。2对支护位移的量测至少应有基坑边壁顶部的水平位移与垂直沉降,测点位置应选在变形最大或局部地质条件最为不利的地段,测点总数不宜小于3个,测点间距不宜大于30m。当基坑附近有重要建筑物等设施时,也应在相应位置设置测点。宜用精密水准仪和精密经纬仪。必要时还可用测斜仪量测支护土体的水平位移,用收敛计监测位移的稳定过程等。3应特别加强雨天和雨后的监测,以及对各种可能危机支

37、护安全的水害来源(如场地周围生产、生活排水、上下水道、储水池罐、化粪池、渗漏水,人工井点降水的排水,因开挖后土体变形造成管道漏水等)进行仔细观察。4在施工开挖过程中,基坑顶部的侧向位移与当时的开挖深度之比如超过35。(一般粘性土中)时,应密切加强观察、分析原因并及时对支护采取加固措施,必要时增用其它支护方法。七、审查竣工资料1各种原材料的出厂合格证及材料试验报告;2工程开挖记录;3钻孔记录(钻孔尺寸、误差、孔壁质量、以及钻取土样特征等);4注浆记录以及浆体的试件强度试验报告等;5喷混凝土记录(面层厚度检测数据,混凝土试件强度试验报告等);6设计变更报告及重大问题处理文件,反馈设计图;7土钉抗拔测试报告;8支护位移、沉降及周围地表、地物等各项监测内容的量测记录与观察报告;9在支护竣工后的规定使用期限内,支护施工单位应继续对支护的变形进行监测。八、涉及的规范和标准1建筑工程施工验收统一标准(GB503002001)2建筑基坑支护技术规程(JGJ12099)3锚杆装饰装修工程质量验收规范。- 9 -

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