x水泥稳定层路拌法施工方案.doc

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1、In order to ensure normal teaching order, protecting students healthy growth, ensuring that national (property) is not lost, to prevent or minimize the occurrence of safety accidents, follow the prevent, rescue each other, ensure safety and reduce losses principle, according to the local conditions,

2、 make the management system. 1, the principal is the responsibility of school safety, school security under the leadership of President security work leading group. The head teacher to the leadership team is responsible for, implementation of the accountability system. 2, school monthly student know

3、ledge about safety education, education should be diversified in the form every safety education for students of classes per week should be targeted. To carry on emergency issues dealing with education in General, self-help and mutual rescue knowledge. Emergency calls (such as 110, 119, 122, 120, an

4、d so on) use common sense in education. 3, the establishment of major accident reporting system. School students report major accident within an hour of education; student run and disappearances to report; report of the accident to a written report in triplicate, a correctional centre, a police stat

5、ion, a township peoples Government shall not conceal the accident. 4 week, teachers are on duty system, establish and improve the leadership values; strengthen the education, management of teaching activities in schools to ensure normal teaching order; responsible for school safety leadership always

6、 maintained close contact and district police stations, canvassing support from the police station on school safety and help. 5, strengthening teachers moral education, establish a dedicated love, improving education quality, observe the students psychological changes at any time and take preventive

7、 measures, no corporal punishment and covert corporal punishment on students, student out of the classroom, schools may not be. 6, units or departments use student Street propaganda or participate in the celebrations, as well as participating in other social work, without approval of the Correctiona

8、l Centre, school principals consent, without organization. Without the approval of relevant departments, may organize students to participate in fire fighting, disaster relief and so on. 7, schools should educate students to obey the school rules and regulations, on time, on time home to prevent acc

9、idents. 8, school to school inspections on a regular basis, found hidden in time, and in severe cases, it is hard to eliminate immediately closed, and reported to the local peoples Government, education, and rule of law section. 9, the school should always check the internal walls, retaining walls,

10、ponds, railings, handrails, doors, Windows, staircases and a variety of sports, extracurricular activities, facilities such as fire safety, infrastructure security, unsafe facility to immediately repair and demolition to ensure that teachers and students work, learn, live venues and facilities are s

11、afe and reliable. Song Lin Xiang Liu Jia ping elementary school March 2016 song Lin Xiang Liu Jia ping primary school fire safety systems to enhance fire safety, protection of public property and the life and property safety of teachers and students, school fire safety into day-to-day management, is

12、 developing the following fire safety system. 1, strengthen fire safety education of the whole school. According to the requirements of the Fire Services Act, so that everyone has of keeping fire control safety, protecting fire control facilities, fire prevention, reports of fire水泥稳定层路拌法施工方案路拌法施工的工艺

13、流程宜按图1的顺序进行。一、准备下承层1水泥稳定土的下承层表面应平整、坚实,具有规定的路拱,下承层的平整度和压实度应符合规范的规定。2当水泥稳定土用做基层时,要准备底基层;当水泥稳定土用做老路面的加强层时,要准备老路面;当水泥稳定土用做底基层时,要准备土基。准备下承层施工放样备料、摊铺土洒水闷料整平和轻压摆放和摊铺水泥拌和(干拌)加水并湿拌整形碾压接缝和调头处的处理养生(1)对土基不论是路堤还是路堑,必须用12-15t三轮压路机或等效的碾压机械进行3-4遍碾压检验。在碾压过程中,如发现土过干、表层松散,应适当洒水;如土过湿,发生“弹簧”现象,应采用挖开、晾晒、换土、掺石灰或水泥等措施进行处理。

14、图1 路拌法施工水泥稳定土的工艺流程(2)对于底基层,应进行压实度检查,对于柔性底基层还应进行弯沉值检验。凡不符合设计要求的路段,必须根据具体情况,采用措施,使之达到规范规定的标准。(3)对于老路面,应检查其材料是否符合底基层材料的技术要求,如不符合要求,应翻松老路面并采取必要的处理措施。(4)底基层或老路面上的低洼和坑洞,应仔细填补及压实;搓板和辙槽应刮除;松散处,应耙松洒水并重新碾压,达到平整密实。(5)新完成的底基层或土基,必须按规范的规定进行验收。凡验收不合格的路段,必须采取措施,使其达到标准后,方可铺筑水泥稳定土层。(6)应按规范的规定逐个断面检查下承层标高。3在槽式断面的路段,两侧

15、路肩上每隔一定距离(可为5-10m)交错开挖泄水沟(或做盲沟)。二、施工放样1在底基层或老路面或土基上恢复中线,直线段每20-25m设一桩,平曲线段每15-20m设一桩,并在两侧路肩边缘外设指示桩。2在两侧指示桩上用明显标记标出水泥稳定土层边缘的设计高。三、备料1利用老路面或土基上部材料。(1)必须首先清除干净老路面上或土基表面的石块等杂物。(2)每隔20-25m挖一小洞,使洞底标高与预定的水泥稳定土层的底面标高相同,并在洞底做一标记,以控制翻松及粉碎的深度。(3)用犁、松土机或装有强固齿的平地机或推土机将老路面或土基的上部翻松到预定的深度,土块应粉碎到符合要求。(4)应经常用犁将土向路中心翻

16、松,使预定处治层的边部成一个垂直面,防止处治宽度超过规定。(5)用专用机械粉碎粘性土。在无专用机械的情况下,也可以用旋转耕作机、圆盘耙粉碎塑性指数不大的土。2利用料场的土(包括细粒土、中粒土和粗粒土)。(1)采集土前,应先将树木、草皮和杂土清除干净。(2)土中的超尺寸颗粒应予筛除。(3)应在预定的深度范围内采集土,不应分层采集,不应将不合格的土采集一起。(4)对于塑性指数大于12的粘性土,可视土质和机械性能确定土是否需要过筛。(5)计算材料用量:根据各路段水泥稳定土层的宽度、厚度及预定的干密度,计算各路段需要的干燥土的数量。根据料场土的含水量和所用运料车辆的吨位,计算每车料的堆放距离。根据水泥

17、稳定土层的厚度和预定的干密度及水泥剂量,计算每一平方米水泥稳定土需要的水泥用量,并确定水泥摆放的纵横间距。(6)在预定堆料的下承层上,在堆料前应先洒水,使其表面湿润,但不应过分潮湿而造成泥泞。(7)土装车时,应控制每车料的数量基本相等。(8)在同一料场供料的路段内,由远到近将料按上述计算距离卸置于下承层表面的中间或上侧。卸料距离应严格掌握,避免有的路段料不够或过多。(9)料堆每隔一定距离应留一缺口。(10)土在下承层上的堆置时间不应过长。运送土只宜比摊铺土工序提前1-2d。四、摊铺土1应事先通过试验确定土的松铺系数。人工摊铺混合料时,其松铺系数可按下表选用。混合料松铺系数参考表材料名称松铺系数

18、备 注水泥稳定砂砾1.30-1.35水泥土1.53-1.58现场人工摊铺土和水泥,机械拌和,人工整平2摊铺土应在摊铺水泥的前一天进行。摊铺长度按日进度的需要量控制,满足次日完成掺加水泥、拌和、碾压成型即可。雨季施工,如第二天有雨,不宜提前摊铺土。3应将土均匀地摊铺在预定的宽度上,表面应力求平整,并有规定的路拱。4摊料过程中,应将土块、超尺寸颗粒及其他杂物拣除。5如土中有较多土块,应进行粉碎。6检验松铺土层的厚度,应符合预计要求。7除洒水车外,严禁其他车辆在土层上通行。五、洒水闷料1如已整平的土(含粉碎的老路面)含水量过小,应在土层上洒水闷料。洒水应均匀,防止出现局部水分过多的现象。2严禁洒水车

19、在洒水段内停留和调头。3细粒土应经一夜闷料;中粒土和粗粒土,视其中细土含量的多少,可缩短闷料时间。4如为综合稳定土,应先将石灰和土拌和后一起进行闷料。六、整平和轻压对人工摊铺的土层整平后,用6-8t两轮压路机碾压1-2遍,使其表面平整,并有一定的压实度。七、摆放和摊铺水泥1按计算出的每袋水泥的纵横间距,在土层上做安放标记。2应将水泥当日直接送到摊铺路段,卸在做标记的地点,并检查有无遗漏和多余。运水泥的车应有防雨设备。3用刮板将水泥均匀摊开,并注意使每袋水泥的摊铺面积相等。水泥摊铺完后,表面应没有空白位置,也没有水泥过分集中的地点。八、拌和(干拌)1对二级及二级以上公路,应采用专用稳定土拌和机进

20、行拌和并设专人跟随拌和机,随时检查拌和深度并配合拌和机操作员调整拌和深度。拌和深度应达稳定层底并宜侵入下承层5-10mm,以利上下层粘结。严禁在拌和层底部留有素土夹层。通常应拌和两遍以上,在最后一遍拌和之前,必要时可先用多铧犁紧贴底面翻拌一遍。直接铺在土基上的拌和层也应避免素土夹层。2对于三、四级公路,在没有专用拌和机械的情况下,可用农用旋转耕作机与多铧犁或平地机相配合进行拌和,但应注意拌和效果,拌和时间不能过长。先用平地机或多铧犁(四铧犁或五铧犁)将铺好水泥的土翻拌两遍,使水泥分布到土中,但不应翻犁到底,防止水泥落到底部第一遍由路中心开始,将混合料向中间翻,机械应慢速前进;第二遍应相反,从两

21、边开始,将混合料向外侧翻。接着用旋转耕作机拌和两遍。再用多铧犁或平地机将底部料翻起。随时检查调整翻犁的深度,使稳定土层全部翻透。严禁在稳定土层与下承层之间残留一层素土,也应防止翻犁过深或过多破坏下承层的表面,通常应翻犁两遍。接着,再用旋转耕作机拌和两遍,用多铧犁或平地机再翻犁两遍。3对于三、四级公路,在没有专用拌和机械的情况下,也可以用缺口圆盘耙与多铧犁或平地机相配合,拌和水泥稳定细粒土和中粒土,但应注意拌和效果,拌和时间不可过长。用平地机或多铧犁在前面翻拌,用圆盘耙跟在后面拌和。圆盘耙的速度应尽量快,使水泥与土拌和均匀。应翻拌四遍,开始的两遍不应翻犁到底,以防水泥落到底部;后面的两遍应翻犁到

22、底,随时检查调整翻犁的深度。九、加水并湿拌1在上述拌和过程结束时,如果混合料的含水量不足,应用喷管式洒水车(普通洒水车不适宜用作路面施工)补充洒水。水车起洒处和另一端调头处都应超出拌和段2m以上。洒水车不应在正进行拌和以及当天计划拌和的路段上调头和停留,以防局部水量过大。2洒水后,应再次进行拌和,使水分在混合料中分布均匀。拌和机械应紧跟在洒水车后面进行拌和,减少水分流失。3洒水及拌和过程中,应及时检查混合料的含水量。含水量宜略大于最佳值。对于稳定粗粒土和中粒土,宜较最佳含水量大0.5%-1.0%;对于稳定细粒土,宜较最佳含水量大1%-2%。4在洒水拌和过程中,应配合人工拣出超尺寸颗粒,消除粗细

23、颗粒“窝”以及局部过分潮湿或过分干燥之处。5混合料拌和均匀后应色泽一致,没有灰条、灰团和花面,即无明显粗细集料离析现象,且水分合适和均匀。十、整形1混合料拌和均匀后,应立即用平地机初步整形。在直线段,平地机由两侧向路中心进行刮平;在平曲线段,平地机由内侧向外侧进行刮平。必要时,再返回刮一遍。2用拖拉机、平地机或轮胎压路机立即在初平的路段上快速碾压一遍,以暴露潜在的不平整。3再用平地机按本条第1款进行整形,整形前应用齿耙将轮迹低洼处表层5cm以上耙松,并按本条第2款再碾压一遍。4对于局部低洼处,应用齿耙将其表层5cm以上耙松,并用新拌的混合料进行找平。5再用平地机整形一次。应将高处料直接刮出路外

24、,不应形成薄层贴补现象。6每次整形都应达到规定的坡度和路拱,并应特别注意接缝必须顺适平整。7当用人工整形时,应用锹和耙先将混合料摊平,用路拱板进行初步整形。用拖拉机初压1-2遍后,根据实测的松铺系数,确定纵横断面的标高,并设置标记和挂线。利用锹耙按线整形,再用路拱板校正成型。如为水泥土,在拖拉机初压之后,可用重型框式路拱板(拖拉机牵引)进行整形。8在整形过程中,严禁任何车辆通行,并保持无明显的粗细集料离析现象。十一、碾压1根据路宽、压路机的轮宽和轮距的不同,制订碾压方案,应使各部分碾压到的次数尽量相同,路面的两侧应多压2-3遍。2整形后,当混合料的含水量为最佳含水量(+1% +2%)时,应立即

25、用轻型压路机并配合12t以上压路机在结构层全宽内进行碾压。直线和不设超高的平曲线段,由两侧路肩向路中心碾时,应重叠1/2轮宽,后轮必须超过两段的接缝处,后轮压完路面全宽时,即为一遍。一般需碾压6-8遍。压路机的碾压速度,头两遍以采用1.5-1.7km/h为宜,以后宜采用2.0-2.5km/h。采用人工摊铺和整形的稳定土层,宜先用拖拉机或6-8t两轮压路机或轮胎压路机碾压1-2遍,然后再用重型压路机碾压。3严禁压路机在已完成的或正在碾压的路段上调头或急刹车,应保证稳定土层表面不受破坏。4碾压过程中,水泥稳定土的表面应始终保持湿润,如水分蒸发过快,应及时补撒少量的水,但严禁洒大水碾压。5碾压过程中

26、,如有“弹簧”、松散、起皮等现象,应及时翻开重新拌和(加适量的水泥)或用其他方法处理,使其达到质量要求。6经过拌和、整形的水泥稳定土,宜在水泥初凝前并应在试验确定的延迟时间内完成碾压,并达到要求的密实度,同时没有明显的轮迹。7在碾压结束之前,用平地机再终平一次,使其纵向顺适,路拱和超高符合设计要求。终平应仔细进行,必须将局部高出部分刮除并扫出路外;对于局部低洼之处,不再进行找补,可留待铺筑沥青面层时处理。十二、接缝和调头处的处理1同日施工的两工作段的衔接处,应采用搭接。前一段拌和整形后,留5-8m不进行碾压,后一段施工时,前段留下未压部分,应再加部分水泥重新拌和,并与后一段一起碾压。2经过拌和

27、、整形的水泥稳定土,应在试验确定的延迟时间内完成碾压。3应注意每天最后一段末端缝(即工作缝)的处理。工作缝和调头处可按下述方法处理:(1)在已碾压完成的水泥稳定土层末端,沿稳定土挖一条横贯铺筑层全宽的宽约30cm的槽,直挖到下承层顶面。此槽应与路的中心线垂直,靠稳定土的一面应切成垂直面,并放两根与压实厚度等厚、长为全宽一半的方木紧贴其垂直面。(2)用原挖出的素土回填槽内其余部分。(3)如拌和机械或其他机械必须到已压成的水泥稳定土层上调头,应采取措施保护调头作业段。一般可在准备用于调头的约8-10m长的稳定土层上,先覆盖一张厚塑料布或油毡纸,然后铺上约10cm厚的土、砂或砂砾。(4)第二天,邻接

28、作业段拌和后,除去方木,用混合料回填。靠近方木未能拌和的一小段,应人工进行补充拌和。整平时,接缝处的水泥稳定土应较已完成断面高出约5cm,以利形成一个平顺的接缝。(5)整平后,用平地机将塑料布上大部分土除去(注意勿刮破塑料布),然后人工除去余下的土,并收起塑料布。在新混合料碾压过程中,应将接缝修整平顺。4纵缝的处理水泥稳定土层的施工应该避免纵向接缝,在必须分两幅施工时,纵缝必须垂直相接,不应斜接。纵缝应按下述方法处理:(1)在前一幅施工时,在靠中央一侧用方木或钢模板做支撑方木或钢模板的高度与稳定土层的压实厚度相同;(2)混合料拌和结束后,靠近支撑木(或板)的一部分,应人工进行补充拌和,然后整形

29、和碾压。(3)养生结束后,在铺筑另一幅之前,拆除支撑木(或板);(4)第二幅混合料拌和结束后,靠近第一幅的部分,应人工进行补充拌和,然后进行整形和碾压。十三、水泥稳定层的养生及交通管制1、 每一段碾压完成并经压实度检查合格后,应立即开始养生。2、 可用洒水车经常洒水进行养生。每天洒水的次数应视气候而定。整个养生期间应始终保持稳定土层表面潮湿,应注意表层情况,必要时,用两轮压路机压实。3、 在养生期间未采用覆盖措施的水泥稳定土层上,除洒水车外,应封闭交通。在采用覆盖措施的水泥稳定土层上,不能封闭交通时,应限制重车通行,其他车辆的车速不应超过30km/h。4、养生期结束后,如其上为沥青面层,应先清

30、扫基层,并立即喷洒透层或粘层沥青。在喷洒透层或粘层沥青后,宜在上均匀撒布5-10mm的小碎(砾)石,用量约为全铺一层用量的60%-70%。在清扫干净的基层上,也可先做下封层,以防止基层干缩开裂,同时保护基层免遭施工车辆破坏,宜在铺设下封层后的10-30d内开始铺筑沥青面层的底面层。注:如喷洒的透层沥青能透入基层,且运料车辆和面层混合料摊铺机在上行驶不会破坏沥青膜时,可以不撒小碎(砾)石。在撒小碎(砾)石的情况下,应尽早铺筑沥青面层的底面层。Electricity lines, equipment inspections, found hidden in time for rectificati

31、on, maintenance, and security. 9, do not use an open flame in the classroom, prohibit burning stove, lit candles, mosquito repellent, no smoking, and banning messy wiring. Without using any household appliances is not allowed. 10, live on campus faculty members, must lead by example, and educate fam

32、ilies and children ready to fire. 11, household use of gas in schools, to master proper usage, pay attention to the leak-proof, explosion-proof, fireproof, closing valve after use to ensure security. 12, dining room must be qualified, and annual testing of pressure vessels, to regularly check, the c

33、anteen workers must be certified, strictly by operation operation, gas tank and stove safety distance of 1.5 meters, to prevent accidents. 13, the adverse consequences caused by ignoring fire safety regulations, will be punished, until investigated for legal responsibility. Song Lin Xiang Liu Jia pi

34、ng elementary school March 2016 Xiang Liu Jia ping elementary school, pine slopes surrounding safety management system 1 teachers and students, the surrounding area of the school governance covers personal and food hygiene, cultural events and other aspects, integrated governance shall obtain wide s

35、upport and full cooperation of the community. On the surrounding environment in schools should be closely monitored. 2, school work at the same time, should pay attention to the safety management of school environment, should take the initiative to contact the district police station, the village Co

36、mmittee, Correctional Centre, Township government, business management and other departments to do a good job management. 3, teacher on duty with the exception of inspections in schools, should also pay attention to environmental inspections near the campus, found that the jobless migrants from rura

37、l areas, for example, harassment of students and a variety of accidents, according to different situations reported school officials or the police station in a timely manner, to protect the safety of students. 4, every day before school, teachers remind students, pay attention to traffic safety. 5,

38、should educate students to respect social ethics, and various regulations, maintaining public order, and fight the bad guys, and grasp the correct ways and means of maintaining and improving students self-care ability. 6, the establishment of emergency rescue teams of teachers in schools, on high al

39、ert and deployed. Song Lin Xiang Liu Jia ping elementary school March 2016 song Lin Xiang Liu Jia ping primary school teachers and students organizations out of safety management system organization activities between teachers and students, to draw up a precise plan and security measures must be sig

40、ned by the school officials to review the programme of activities agreed upon Correctional Center agreed to implement. Organization to the field relatively far or activities require approval by the Deputy Director of the Education Bureau in charge of security. 2, each activity should have a specific

41、 responsibility, pay attention to the persons age, physical match. Route 3, activities, location, field surveys should be carried out in advance. 4, activities for the means of transport should explain the situation to the school to comply with vehicle, safety requirements, before the line for repai

42、rs. 5, each activity must have security, emergency response plan for accidents. 6, picnics, hiking, picnic to pay attention to fire prevention, food poisoning, prevention of fall accidents 7, the activities near the rivers, reservoirs, no measures or do not meet the security requirements of the Organization and not let students into the water

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