生料库滑模施工方案E.doc

Method statement for raw material silo
Ⅰ. Project description
1.0 Raw material silo：RCC silo, outside diameter is φ23.4×72m.A cone starts at 8.693. Ring foundation is adopted. Concrete structure for the top.
Ⅱ. References
1.0 Drawings of raw meal homogenizing silo & kiln feeding system
2.0 The construction organization and design
3.0 The relative construction codes and regulations
Ⅲ. Main construction method
1.0 Preparations
1.1 Equipment: Mobilization and commissioning of tower crane, sliding devices, welder, etc, so as to ensure the slip form works in the normal way.
1.2 Materials: Work out the plan of steel and carry out the fabrication work, prepare the plan of concrete and other materials.
1.3 Job site: Smooth and straight so as to ensure the convenience of material transportation.
1.4 Adequate manpowers.
2.0 Silo wall slip form construction
2.1Slip form construction
a. Concrete
The concrete adopted for this job will be ready mixed concrete. The following data shall be noted in the plan sheet: pouring and vibrating time, pouring section, strength requirement, slumps and the quantity (cubic meters) intended to be poured and planned time of pouring. When slipform starts, the concrete shall be continuous, and the masons follows to vibarte. The concrete will be put into formworks and vibrated at the same time from both directions, so as to avoid the occurrence of slots or cracks caused by the already hardened concrete when only work to one direction. The proper slump requirement for slipform is 90-140mm.
Concrete transportation: the concrete in the self-fabricated tipcart will be transported by the headframe to the sliding platform, and supplied to place of pouring by the tipcart.
Vertical transportation: After calculation, the capacity of the tower crane meets the actual transportation demand. At the same time vertical transportation of the concrete should meet the demand for different section, Therefore, three headframe, which could goes up with the platform, is needed for silo wall sliding up, and self-fabricated tipcart, actually the capacity of the lorry is 0.18 cubic meters.
Concrete pouring: when the silo wall is sliding up, put the concrete from the tipcart onto the platform between two slip form supports, masons shovel all the concrete on the platform into the formwork, masons following to vibrate the concrete. The concrete shall be continuously, and put into formworks and vibrated at the same time to both directions, so as to avoid the occurrence of slots or cracks caused by the already hardened concrete when only work in one direction.
After put the concrete into the formwork, vibrate it in time with poker vibrator. The working principle is “quick insert and slowly pull out”, “one vibrator after another”, “vibrating in parallel”. For each point, the vibrating time is 20s-30s, the vibration could not be stopped only when the concrete surface does not go down obviously, and there is no air bubble comes out, and thick liquid occurs on the concrete surface. When vibrating the upper layer, the insert to the lower layer could not more than 5cm and connection joints between these two layers shall be eliminated. No vibration and over vibration is forbidden.
When concrete is delivered, slump should be checked. The proper slump for slip form construction is 90-140mm.
Records must be taken and kept for the strength test, and mark out the pouring section and strength etc. The concrete shall be crushed at 7 and 28 days. When results are satisfactory, the documents shall be kept in the archives. As for the disqualified cubes, the reasons have to be found out and actions for that batch have to be taken.
b. Reinforcement
The vertical rebars lapping shall staggered at 1/4, and the overlapped area of ring horizontal rebars shall be no less than 50d. when the overlapping joints staggered distance is longer than 1000, then one rebar could be overlapped in the same area every four pieces. The rebars above the door and of the silo wall shall be bond when sliding up, the binding works shall be done with the concrete grouting one after the other.
The concrete cover and position of the rebars are ensured to be correct by the clips installed in the horizontal beam of the slip form supports.
c. sliding-up
Preliminary sliding-up: when begin with silo wall grouting, the concrete shall be grouted in 3 layers into the formwork of 1200mm on both directions. Try to slide up the wall after 4 or 5 hours with 2 to 4 courses. Test the concrete out of the formwork with hand, when there is only a slight fingerprint and the concrete does not stick to the hand, then the normal sliding up procedure could be carried out after a short break.
After completion of the soleplate construction, the above-mentioned method shall be taken for the grouting of upper silo wall.
Attention:
When start constructing silo wall above the soleplate, please pay attention to see whether the concrete strength of the soleplate meet sliding-up requirement because the sliding-up will start immediately after finish soleplate grouting works. If the concrete is not strong enough, the sliding-up speed shall be decreased.
Normal sliding up: each time sliding up 30cm, the concrete shall be grouted circularly on both directions. It shall be lifted at an interval of 1.5-2.0 hours, and when the temperature is high, it could be lifted 1-2 courses additionally.
Whenever sliding up, correction works has to be done to avoid excursion and torsion, in case the deviation of the plummets for excursion and torsion controlling exceed 15mm (generally if any deviation occurs), correction works shall be done.
Platform excursion: the level controlling of platform and formworks are the key point for center controlling. Before sliding up the formworks, the whole platform and the level of the jack must be checked and corrected by water level. The support shall be checked by water level as well, it shall be checked every other grouting.
Deviation of the platform shall be corrected by inclining, lift the jack on the deviated side to a proper height and sliding up when the platform is inclined (no more than 1%), after the deviation has been corrected, continue with normal sliding procedure.
Platform torsion: torsion of the platform shall be corrected by dragging, 8 points shall be selected evenly along the periphery and dragged by manual hoists to the opposite direction of the torsion, the torsion will be corrected when lift up the formwork.
Attention:
The poles must be reinforced when lifting up the platform without concrete.
Stop sliding: when the sliding up must be stopped due to construction necessity or special cases, it shall be lifted up 1-2 courses at an interval of 0.5-1.0 hour, until the formwork and concrete do not stick together (around 4 hours), and it shall be lifted up 1 course the next day.
Special record sheets have been taken for this job for technical controlling of every item, detailed information see attachment.
d.Embedded parts and openings: on the sliding platform, nameplates shall be installed for all the embedded parts and openings and marked the code of embedded parts, size, and elevation data, and one person shall specially manage these nameplates.
Attention:
During construction there are much more iron parts and openings, therefore, the responsible person of the platform shall review and check the drawing and construction markings carefully to avoid any mistake.
e. Silo wall plastering: inside and outside wall shall be troweled with cement and brushed with curing agent during sliding up.
2.4 Items shall pay attention to
2.4.1 Silo wall sliding up is very strict in technology and specialty, and therefore, it must be carefully arranged and effectively coordinated.
All the items shall be managed specially by different person with clearly defined responsibility; everybody must work full-time without part-time job.
According to the management system, the persons who in charged above and below the platforms are under the leadership of the chief management.
The persons who in charged material supply, tests, concrete grading and dosing, concrete mixing, concrete horizontal transport, rebar classification and lifting, accommodation and medicine are under leadership of the one who is responsible for the items below the platform.
The persons who in charged concrete vertical transport, rebar binding, concrete grouting and vibrating, platform leveling correction, prolonging of the supports, height control, surface treatment of the concrete after taking away the formworks, installation of embedded parts of each section are under the leadership of the person who is responsible for the items above the platform.
2.4.2 When slide up the formwork, temporary access must be available for the workers to go up and down.
2.4.3 During slip form construction, whenever sliding up, correction works has to be done for excursion and torsion, twice vertical correction has to be done per shift, 4 symmetrical points shall be selected for each section to measure the perpendicularity, and compared with the deviation of plummet for excursion and torsion.
2.4.4 The allowed tolerances in slip form construction
Vertical tolerance:
Total height: 0.3% of the total height, no more than +/- 80mm
Per 7.5m in height: +/- 50 mm
Silo diameter tolerance:
0.1% of the diameter of silo wall section, no more than +/- 25 mm
Silo wall thickness
No thicker than regulated thickness: 10mm
No thinner than regulated thickness: 5 mm.
The slip form system shall be dismantled 2 days after the concrete grouting has been completed. The working principle is “dismantlement after assemble”, the operators must comply with all the instructions, well fasten the safety belt, dismantlement must be done in right sequence, and take use of tower crane.
Ⅳ. Technology and Safety
1.0 Slip form mainly works high above the ground, and very dangerous. 　　Therefore, the staff works for this job must enhance their knowledge and improve their safety consciousness and conception to accomplish the job successfully.
2.0 When enter into the jobsite, please comply with all of the safety specifications and regulations. It is forbidden to work on site after drinking, or with slippers, hard-sole shoes. It is not permitted to fight and play on site.
3.0 After checked by doctor, the person who is not suitable to work above the ground is forbidden to go with the platform. The staff who works above the ground is forbidden to throw anything to the ground, if it is necessary to transfer something, it must be transferred through headframe or tower crane. When transfer something, the operator must be within the platform handrails and well fasten the safety belt.
4.0 The platform must be assembled with rigidity and stability; the operators must check the stability and correct the platform at any time. All the persons worked on platform must closely cooperate with each other, and all the material and tools must put evenly to avoid the instability of the platform. Whenever push the trolley, convey material or tools, or dump the concrete, all of these must be done carefully and slightly.
5.0 Actions must be taken to ensure and improve safety works, safety production plate and nameplate must be erected in the striking places. During slip form construction above the ground, safety area must be marked definitely by white lines to prevent the entering of the persons not belongs to the working group. The jobsite must be temporarily fenced and installed with electrical lighting for nighttime.
6.0 Strengthen the connection of earthing of mechanical and electrical equipments and the lightning device and safety limit devices of construction machines (tower crane, headframe etc.).
7.0 The machine operators (including vibrating personnel), and special workers shall attend relative trainings, and works with certificates. Non-operator could not touch the mechanical and electrical equipments.
8.0 Strengthen the lighting of works during night. It is forbidden to connect the wires randomly. Comply with the power regulations, the telegraph pole shall be wooden, it could not be dragged everywhere and hung on the headframe or contact with steel pipes.
9.0 In order to prevent somebody fall down from high altitude, the four openings and the places nearby shall be equipped with protection advices. The slip form platform, headframe platform and scaffold, chute access shall be vertically and horizontally complete-closed with safety net.
10.0 The key point of safety works on site is “five preventions”, more attention shall be paid to everybody, and the responsible personnel. Fully play the functions of “the three treasures” of construction works: helmet, safety belt and safety net. Whenever explain the technical requirements and design intension, the safety works shall be mentioned as well.
11.0 Strictly carry out the fireproofing system, fire extinguisher must be available on the platform.
12.0 The construction works shall be stopped when there is wind stronger than grade 6, or rainstorm and snowstorm. Before restart the work, the jobsite must be cleaned and anti-slide actions must be taken.
13.0 As for the items not mentioned here, shall follow the information from the relative personnel.

下面为附送毕业论文致谢词范文！不需要的可以编辑删除！谢谢！

毕业论文致谢词

我的毕业论文是在韦xx老师的精心指导和大力支持下完成的，他渊博的知识开阔的视野给了我深深的启迪，论文凝聚着他的血汗，他以严谨的治学态度和敬业精神深深的感染了我对我的工作学习产生了深渊的影响，在此我向他表示衷心的谢意

这三年来感谢广西工业职业技术学院汽车工程系的老师对我专业思维及专业技能的培养，他们在学业上的心细指导为我工作和继续学习打下了良好的基础，在这里我要像诸位老师深深的鞠上一躬!特别是我的班主任吴廷川老师，虽然他不是我的专业老师，但是在这三年来，在思想以及生活上给予我鼓舞与关怀让我走出了很多失落的时候，“明师之恩，诚为过于天地，重于父母”，对吴老师的感激之情我无法用语言来表达，在此向吴老师致以最崇高的敬意和最真诚的谢意!

感谢这三年来我的朋友以及汽修0932班的四十多位同学对我的学习，生活和工作的支持和关心。三年来我们真心相待，和睦共处，不是兄弟胜是兄弟!正是一路上有你们我的求学生涯才不会感到孤独，马上就要各奔前程了，希望（，请保留此标记。）你们有好的前途，失败不要灰心，你的背后还有汽修0932班这个大家庭!

最后我要感谢我的父母，你们生我养我，纵有三世也无法回报你们，要离开你们出去工作了，我在心里默默的祝福你们平安健康，我不会让你们失望的，会好好工作回报社会的。

致谢词2

在本次论文设计过程中，感谢我的学校，给了我学习的机会，在学习中，老师从选题指导、论文框架到细节修改，都给予了细致的指导，提出了很多宝贵的意见与建议，老师以其严谨求实的治学态度、高度的敬业精神、兢兢业业、孜孜以求的工作作风和大胆创新的进取精神对我产生重要影响。他渊博的知识、开阔的视野和敏锐的思维给了我深深的启迪。这篇论文是在老师的精心指导和大力支持下才完成的

感谢所有授我以业的老师，没有这些年知识的积淀，我没有这么大的动力和信心完成这篇论文。感恩之余，诚恳地请各位老师对我的论文多加批评指正，使我及时完善论文的不足之处。

谨以此致谢最后，我要向百忙之中抽时间对本文进行审阅的各位老师表示衷心的感谢。
开学自我介绍范文：首先，我想说“荣幸”，因为茫茫人海由不相识到相识实在是人生一大幸事，更希望能在三年的学习生活中能够与大家成为好同学，好朋友。其次我要说“幸运”，因为在短暂的私下接触我感觉我们班的同学都很优秀，值得我学习的地方很多，我相信我们班一定将是团结、向上、努力请保留此标记。）的班集体。最后我要说“加油”衷心地祝愿我们班的同学也包括我在内通过三年的努力学习最后都能够考入我们自己理想中的大学，为老师争光、为家长争光，更是为了我们自己未来美好生活和个人价值，加油。哦，对了，我的名字叫“***”，希望大家能记住我，因为被别人记住是一件幸福的事！！
）查看更多与本文《高中生开学自我介绍》相关的文章。

精品word文档可以编辑（本页是封面）

【最新资料 Word版 可自由编辑！！】

精品word文档可以编辑（本页是封面）

【最新资料 Word版 可自由编辑！！】