防爆墙基础施工方案

防爆墙施工方案

Blast Wall Construction Proposal

防爆墙体基础为条形基础，-0.2以下到条形基础表面是800厚的剪力墙。其施工方案如下。

The foundation of blast wall is strip foundation, and below -0.2 to the strip foundation surface is 800 thick shear wall.Construction Proposal as follows:

一、施工准备Construction preparation

(一)作业条件Construction condition

1、已办完模板及施工缝的预检手续。Completing the procedure of formwork and construction joints prechecking

2、检查模板下口、洞口及角模处拼接，大面模板拼接处是否严密，加固是否可靠，各种连接件及支撑是否牢固。

Check the formwork end openings ，entrances and joining together places，whether the joining together places of big formworks are tight and stably fastened, and whether the fittings and supports are solid.

3、墙体钢筋应有可靠的定位与混凝土保护层措施。Wall rebar should be reliable positioning and the protective layer of concrete .

4、施工缝处提前湿润。The construction joints should be humid in advance .

5、现场工长已对班组长交底，明确混凝土浇筑顺序，以及结合浆的数量。The site foremen are responsible to group leaders,and clear understand the concrete pouring sequence and the amount of combined slurry.

6、砼浇灌申请已由现场工长填写完毕，并经施工单位技术负责人签字确认。The concrete pouring application has been completed by the site foremen and confirmed by the signature of the person in charge of the construction unit.

7、已经做好施工前应具备的电力、机械及通讯、人员等的准备Good preparation has been made,such as electrical,mechanical and communications personnel,before construction .

(二)材质要求Material requirement

1、水泥：水泥品种、强度等级应根据要求确定，质量符合现行水泥标准要求。工期紧

时可做水泥快测。必要时要求厂家提供水泥含碱量的报告。Cement:the type ,strength,grade ,etc, shall be in accordance with the requirement.The quality shall be in line with the current cement standard .If the schedule is tight, we can do a fast cement test. If necessary, we can ask the manufacturer for providing the cement alkalinity test report.

2、砂、石子：根据结构尺寸、钢筋密度、砼施工工艺、砼强度等级的要求确定石子粒径、砂子细度。砂、石质量符合现行标准。必要时做骨料碱活性试验。

Sand,gravel:determine the gravel particle size , sand fineness according to the requirement of structure size，rebar density，concrete processing，concrete strength grade etc. The quality of sand and gravel shall be in line with the current standard.If necessary,aggregate alkali activity tests shall be done.

3、水：自来水或不含有害物质的洁净水。

Water:tap water or water without harmful substance.

4、外加剂：根据施工组织设计要求，采用NC-P3流化膨胀剂。外加剂必须经试验合格后，方可在工程上使用。

Additive:according to the construction organization design requirements,we shall use fluid expansion agent of the PNC-3. The Additive can use in construction after passing the test.

5、掺合料：根据施工组织设计要求，确定是否采用掺合料，质量符合现行标准要求。必要时要求厂家提供含碱量的报告。

Admixture:determining whether the admixture is used according to the construction organization design requirements. The quality shall be in line with the current standard.If necessary, we can ask the manufacturer for providing the alkalinity test report.

6、钢筋：钢筋的级别、规格必须符合设计要求，质量符合现行标准要求。外观检查表面无老锈和油污。

Rebar: the grades and specifications must meet the design requirements and the current standard.Visual inspection of the rebar surface shall be without old rust and oil.

7、脱模剂：水质隔模剂。

Parting agent: water isolating agent

(三)工器具Tools and instruments

混凝土搅拌、输送设备、一般需固定式砼泵、插入式振捣器(Φ50，有效振捣长度375mm)、灰槽、溜槽、铁锹、半截水桶、泵管、布料杆等。

Concrete mixing , transportation equipment , which normally takes stationary concrete pump ,immersion vibrator(Φ50, effective vibrating length of 375mm ) , ashveyor, chute , spades , half a bucket , pump tubes , placing booms ,etc.

二、质量要求Quality requirement

注：砼施工过程具体要严格控制砼浇筑质量。

Note: Concrete construction process shall be strictly control the concrete pouring Quality .

三、工艺流程Process procedure

本工艺按商品砼考虑：浇结合砂浆——砼浇筑、振捣——拆模及养护

Take the process as commercial concrete : pouring binding mortar - concrete pouring , vibrators - formwork removal and conservation..

四、操作工艺Operation process

五、(一)先根据浇筑段墙体轴线长度和墙厚计算出的方量，搅拌与混凝土同配比的无石子砂浆，盛放在灰槽之中(一次不宜搅拌太多。若自拌混凝土，可随用随拌；若预拌混凝土，可根据浇筑量分阶段要结合砂浆)。然后浇筑在底部接槎处约10cm厚，用铁锹均匀入模，不得用泵管直接灌入模内，入模应根据墙体混凝土浇筑顺序进行(应根据现场隋况确定混凝土浇筑顺序)，随浇筑砂浆随浇筑混凝土，禁止一次将一段全部浇筑，以免砂浆凝结。

Firstly, count the square amount ，according to the pouring wall axis length and wall thickness.Mix the non-gravel mortar which has the same ratio with concrete and put it into ashveyor(Don't mix too much at one time.If it's self-mixing concrete,it can be mixed while used;if it's pre-mixing concrete, it can be mixed with mortar according to the pouring amount in different phrases).Then pour it to the bottom contact point about 10cm , put it into mold evenly with spade and put it into mold directly with pump pipe is not allowed. Molding shall be in accordance the sequence of concrete pouring(The sequence of concrete pouring shall be determined according

to the site situation.)In order to avoid mortar condensing, mortar pouring shall follow the concrete pouring and pouring a whole part at one time is not allowed.

(二)浇筑时，要将泵管中砼喷射在溜槽内，由溜槽入模。注意随时用布料尺杆丈量砼浇筑厚度，分层厚度为振捣棒作用有效高度的1.25倍(一般Φ50振捣棒作用有效高度为470mm)，墙体要连续浇筑，严格按照墙体混凝土浇筑顺序图的要求按顺序分层浇筑、振捣。砼下料点应分三点布置。在砼接槎处应振捣密实，浇筑时随时清理落地灰。

While pouring,the concrete in pump pipe shall spray into chute then into the mold.Pay attention to using the ruler to measure the thickness of pouring concrete at all times.The layering thickness shall be 1.25 times as the effect of vibrator beam effective height(Generally,Φ50 vibrator beam effective height is 470mm).Wall pouring shall be continuous;and strictly in line with wall concrete pouring sequence drawing in layers and vibrating.Concrete pouring shall be in different place . Vibrating shall be compacted at the concrete contact point and clean the dust while pouring

(三)振捣点要求均匀分布，一般应≤50cm，同时根据钢筋的密集程度，应配备少量的Φ30振捣棒(应附图)。Vibrating point shall be evenly distributed,generally ≤50cm.Meanwhile,a few Φ30 vibrator beam shall be provided (Referring to the drawing).

(四)洞口进行浇筑时，洞口两侧浇筑高度应均匀对称，振捣棒距洞边≥30cm，从两侧同时振捣，以防洞口变形。

While pouring the hole,the pouring height of the two side shall be even and symmetrical.The distance between vibrator beam and hole shall be ≥30cm and vibrate from the two sides so as to avoid deforming.

(五)在钢筋密集处或墙体交叉节点处，要加强振捣，保证密实。

In rebar crowded areas and wall cross joints, strengthen vibrating and ensure compacting

(六)在振捣时，要派专人看模，发现有胀模、跑位等情况时及时处理，以保证砼的结构尺寸及外观。While vibrating,a special personnel shall be sent to watch the formwork,any formwork inflating and positioning shall be dealt with in time so as to ensure the structure size and appearance of the concrete.

(七)振捣：振捣器的水平移动间距根据振捣棒的有效长度确定，振捣上层砼时，应插入下层砼内的深度不小于50mm，振捣要做到“快插慢拔”，并且要上下微微抽动，以使上下振捣均匀。在振捣时，使砼表面呈水平，不再显著下沉、不再出现气泡表面泛出灰浆为止。振捣中，避免碰撞钢筋、模板、预埋件等，发现有位移、变形，与各工种配合及时处理。

Vibrating:Vibrator horizontally moving distance shall be determined based on the effective height of vibrator beam.while vibrating upper level concrete ,the depth of vibrator beam in the lower level concrete shall be not less than 50mm.Vibrating shall be "inserting quickly and pulling out slowly "and move slightly so as to make it even up and down.While vibrating, the concrete surface shall be kept level with out clearly submerged,bubbles and mortar.In vibrating,the colliding of rebar,formwork,embedded fittings needs to be avoided.We will cooperate with different occupation staff to handle if there is any displacement or deformation.

(八)墙上口找平：砼振捣完毕，将上口甩出的钢筋加以整理，木抹子按标高线控制(比顶板底高2～3cm)，将表面找平。注意将施工缝的部位密实成型。

Wall upside opening leveling:to make up the rebar thrown from the upside opening; and patter control based on elevation(2-3cm higher than top slab),and to keep the surface leveling.Pay attention that position of construction joint compaction

(九)墙体混凝土试块按要求现场应取一组标准养护试块(如混凝土方量大，应按试验要求取)、一至四组同条件养护试块(一组为检验7.5MPa强度，一组为检验1.2MPa强度，冬施时，二组检查抗冻临界强度，可根据气候及楼层情况不定期制作)。

The wall concrete test block shall take a group of test blocks(taking the test blocks according to the testing requirement,if the concrete earthwork is large),1-4group curing test blocks under the same condition(one for 7.5MPa strength testing,one for

1.2MPa strength testing ;while construction in winter, two group for the critical strength testing,and testing irregularly based on climate and storey)

(十)按同条件砼试验单提供的数据控制好拆模时间(同条件试块强度达到1.2MPa)，使拆模时墙体不粘模、不掉角、不裂缝，无砼的质量缺陷，达到光滑平整， 质量要求达到《内部质量控制表》的要求，养护根据现场情况提供不同方法。

Controlling the formwork removal time based on data provided by the concrete test under the same condition(Test block strength reaches to 1.2MPa under the same

condition).The wall shall be smooth and leveling ,without formwork-pasting,wall falling-off and quality flaws of concrete.The quality shall meet the requirements of the Internal Quality Control Form.

(十一)墙体混凝土养护：墙体混凝土应派专人养护，养护方法一般为刷养护剂或喷水养护。喷水养护应每隔2小时养护一次，养护期不小于7天。刷养护剂时，基层应撒水湿润，待表面无明水时，开始刷养护剂，刷完养护剂后，严禁再向墙面喷水养护。

Wall concrete curing: Special personnel shall be sent to cure the wall concrete.Generally, the curing measures are plastering curing agent or spraying water.Spraying water curing shall be every two hours and the curing period is 7 days.While plastering curing agent, the foundation base shall be wet by spraying water, and when the surface is without water ,then start to plaster curing agent,after completing the plastering the agent, spraying water for curing is forbidden.

(十二)成品保护Finished goods protection

1、砼振捣过程中要保护墙体甩出钢筋，施工完毕后及时调整钢筋位置。

In concrete vibrating,the rebar thrown from the wall needs to be preserved and adjust the position of rebar immediately,after the completion of construction.

2、应保护好预留洞、预埋件及预埋套管等。The reserved hole, embedded fittings ,pipe,etc, shall be weel-preserved.

3、秋冬季节，应注意对墙体的养护，防止风干，引起墙面龟裂。

In autumn and winter, the wall curing shall be noted. Preventing air-drying which will cause the wall surface cracks.

4、对于边角部分，应用废竹胶板进行保护。

5、模板拆除时，防止大模碰坏墙体。While formworks removal,prevent big formworks hitting wall.

6、上层墙体浇注时，水泥浆流入下层应及时清理干净。

While upper level concrete pouring,cement mortar which flows into the lower shall be clean up immediately.

(十三)质量通病及防治 Common quality problems and prevention

1、墙体烂根：砼浇筑前，先均匀浇筑10cm水泥砂浆，砼坍落度要严格控制，防止砼

离析，下部振捣应认真操作。

Wall rotten root:Pouring 10cm cement mortar before concrete pouring.Strictly control the concrete collapse degree and prevent concrete separation.Lower vibration shall operate carefully.

2、洞口位移变形：浇筑时防止砼冲击洞口模板，洞口两侧应对称、均匀进行浇筑振捣。模板穿墙螺栓应紧固。

Entrance displacement and deformation: in order to prevent concrete from pounding against the formwork while pouring, the two sides of the entrance shall be symmetrical and the pouring vibration shall be even.Formwork bolts through the wall shall be fastened.

3、墙面气泡过多：振捣时应全部排出气泡，注意“快插慢拔”，至表面不泛气泡为止，模板表面要洁净。

Excessive bubbles on wall surface : the bubbles shall be completely exhausted while vibrating. Note that"inserting quickly and pulling out slowly ",until the there is no bubble on the surface and keep the formwork surface clean.