混凝土養(yǎng)護施工技術(shù)交底6頁

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一分部混凝土養(yǎng)護專項技術(shù)交底一分部施工管

13、段為正線起訖里程D3K320+000D3K323+900，全長3.9km。管段內(nèi)含大橋2座，涵洞5個。混凝土工程存在工程量大、施工工點多、工序施工跨度時間長等特點。結(jié)合本區(qū)屬主要氣候特征是：春旱多風，夏熱多雨，冬季干冷，四季分明?；炷恋酿B(yǎng)護工作必須作為工程質(zhì)量的監(jiān)控重點。各類混凝土結(jié)構(gòu)的養(yǎng)護措施及養(yǎng)護時間遵守鐵路混凝土工程施工質(zhì)量驗收補充標準的規(guī)定。一、混凝土養(yǎng)護的目的混凝土澆搗后，之所以能逐漸凝結(jié)硬化，主要是因為水泥水化作用的結(jié)果，而水化作用則需要適當?shù)臏囟群蜐穸葪l件，因此為了保證混凝土有適宜的硬化條件，使其強度不斷增長，必須對混凝土進行養(yǎng)護?；炷翝沧⒑?，如氣候炎熱、空氣干燥，不及時進行

14、養(yǎng)護，混凝土中水分會蒸發(fā)過快，形成脫水現(xiàn)象，會使已形成凝膠體的水泥顆粒不能充分水化，不能轉(zhuǎn)化為穩(wěn)定的結(jié)晶，缺乏足夠的粘結(jié)力，從而會在混凝土表面出現(xiàn)片狀或粉狀脫落。此外，在混凝土尚未具備足夠的強度時，水分過早的蒸發(fā)還會產(chǎn)生較大的收縮變形，出現(xiàn)干縮裂紋，影響混凝土的耐久性和整體性。而溫度和濕度是影響水泥水化速度和程度的重要因素，所以在混凝土澆筑成型后，必須在一定時間內(nèi)保持適當?shù)臏囟群妥銐虻臐穸龋员ＷC水泥充分的水化?；炷翝仓蟪跗陔A段的養(yǎng)護非常重要，混凝土終凝后應立即進行養(yǎng)護。二、混凝土養(yǎng)護的方法一分部養(yǎng)護方法，夏季主要以灑水覆蓋為主。1、混凝土帶模養(yǎng)護 帶模養(yǎng)護期間，應采取帶模包裹、澆水、噴淋

15、灑水等措施進行保濕、潮濕養(yǎng)護，保證模板接縫處不致失水干燥。為了保證順利拆模，可在混凝土澆筑2448h后略微松開模板，并繼續(xù)澆水養(yǎng)護至拆模后再繼續(xù)保濕至規(guī)定齡期。 現(xiàn)澆結(jié)構(gòu)或構(gòu)件盡量延遲混凝土的拆模時間，混凝土帶模養(yǎng)護期間，采取帶模包裹、澆水或噴淋灑水等措施進行保濕、潮濕養(yǎng)護。 模板上亦應經(jīng)常灑水，夏季應避免曝曬，注意保溫。2、現(xiàn)澆混凝土結(jié)構(gòu)的養(yǎng)護 混凝土振搗完成后，盡量減少暴露時間，并用塑料薄膜緊密覆蓋混凝土暴露面，防止表面水分蒸發(fā)。 暴露面保護層混凝土初凝前后，卷起塑料薄膜，用抹子搓壓表面至少二遍，使之平整后再次覆蓋，注意覆蓋物不要直接接觸混凝土表面，直至混凝土終凝為止。 混凝土養(yǎng)護期間，應

16、重點加強混凝土的濕度和溫度控制，盡量減少表面混凝土的暴露時間，及時對混凝土暴露面進行緊密覆蓋（可采用彩條布、塑料布等進行覆蓋），防止表面水分蒸發(fā)。暴露面混凝土初凝前，應卷起覆蓋物，用抹子搓壓表面至少二遍，使之平整后再次覆蓋保溫保濕的無紡土工布，外貼隔水塑料薄膜，并捆綁牢固。 混凝土養(yǎng)護期間注意采取保溫措施，防止混凝土表面溫度受環(huán)境因素影響（如曝曬等）而發(fā)生劇烈變化。大體積混凝土施工前應制定嚴格的養(yǎng)護方案，控制混凝土內(nèi)外溫差滿足設(shè)計要求。當設(shè)計無要求時，大體積混凝土內(nèi)外溫差不宜超過20。3、混凝土養(yǎng)護環(huán)境條件 混凝土在炎熱季節(jié)拆模后，若天氣產(chǎn)生驟然變化時，采取適當?shù)母魺岽胧?，防止混凝土表面溫度?/p>

17、環(huán)境因素影響（如曝曬等）而發(fā)生劇烈變化，保證養(yǎng)護期間混凝土的芯部與表層、表層與環(huán)境之間的溫差不得超過15，直至混凝土強度達到設(shè)計要求為止。 當混凝土拆模后可能與流動水接觸時，在混凝土與流動的地表水或地下水接觸前采取有效保溫保濕養(yǎng)護措施養(yǎng)護14d以上，且確?；炷莲@得75%以上的設(shè)計強度。養(yǎng)護結(jié)束后及時回填。 對氯鹽環(huán)境中新澆筑的混凝土，保證混凝土在強度達到設(shè)計等級以前不受氯鹽侵蝕。應盡可能推遲新澆混凝土與氯鹽環(huán)境接觸的齡期，一般不宜小于4周。 對于嚴重腐蝕環(huán)境下采用大摻量粉煤灰的結(jié)構(gòu)構(gòu)件，在完成規(guī)定的養(yǎng)護期限后，如條件許可，在上述養(yǎng)護措施基礎(chǔ)上仍應進一步適當延長潮濕養(yǎng)護時間。 在任意養(yǎng)護時間，

18、淋注于混凝土表面的養(yǎng)護水溫度低于混凝土表面溫度時，二者間溫差不得大于15。 混凝土養(yǎng)護期間，對有代表性的結(jié)構(gòu)進行溫度監(jiān)控，定時測定混凝土芯部溫度、表層溫度以及環(huán)境氣溫、相對濕度、風速等參數(shù)，并根據(jù)混凝土溫度和環(huán)境參數(shù)的變化情況及時調(diào)整養(yǎng)護制度，嚴格控制混凝土的內(nèi)外溫差滿足要求。3、混凝土養(yǎng)護期拆模要求 養(yǎng)護期間混凝土強度未達到規(guī)定強度之前，不得承受外荷載。當混凝土強度滿足拆模要求，且芯部混凝土與表層混凝土之間的溫差、表層混凝土與環(huán)境之間的溫差均15時，方可拆模。 在混凝土強度達到2.5MPa以上或滿足設(shè)計及規(guī)范、技術(shù)指南相關(guān)要求時，方可拆除側(cè)模，并應保證混凝土表面不因拆模而受到損傷。拆模時混凝

19、土的溫度不能過高，以免混凝土接觸空氣時降溫過快而開裂，更不能在此時澆涼水養(yǎng)護。三、混凝土養(yǎng)護溫控要求混凝土養(yǎng)護期間應注意采取保溫措施，防止混凝土表面溫度受環(huán)境因素影響（如曝曬、氣溫驟降等）而發(fā)生劇烈變化。養(yǎng)護期間混凝土的芯部與表層、表層與環(huán)境之間的溫差不宜超過20?；炷两K凝后的持續(xù)保濕養(yǎng)護時間可參照下表的規(guī)定執(zhí)行。不同混凝土濕養(yǎng)護的最低期限混凝土 類型水膠比大氣潮濕（RH50%）無風，無陽光直射大氣干燥（RH50%）有風，或陽光直射膠凝材料中摻有礦物摻合料0.455T1010T2020T141075T1010T2020T211410注：大體積混凝土的養(yǎng)護時間不宜小于28d。四、混凝土養(yǎng)護其它

20、要求混凝土拆模后可能與流動水接觸時，應在混凝土與流動的地表水或地下水接觸前采取有效保溫保濕措施養(yǎng)護，養(yǎng)護時間應比上表規(guī)定的時間有所延長（至少14d），且混凝土的強度應達到75%以上的設(shè)計強度。養(yǎng)護結(jié)束后應及時回填。 直接與鹽漬土接觸的混凝土，應保證混凝土在強度達到設(shè)計強度等級以前不受侵蝕。并盡可能推遲新澆混凝土與鹽漬土直接接觸的齡期，一般不宜小于6周。 混凝土養(yǎng)護期間，應對混凝土的養(yǎng)護過程作詳細記錄，并建立嚴格的崗位責任制。 具體分工如下：每個結(jié)構(gòu)物第一負責人為施工隊負責人，現(xiàn)場技術(shù)員負監(jiān)管責任。發(fā)現(xiàn)一次養(yǎng)護不到位，施工隊罰款500元。五、安全注意事項 1、養(yǎng)護人員高空作業(yè)要系安全帶，穿防滑鞋

21、。 2、養(yǎng)護用的支架要有足夠的強度和剛度、蓬帳等搭設(shè)要規(guī)范合理。 3、人員上下支架或平臺作業(yè)要謹慎小心，在保護好混凝土成品，保證養(yǎng)護措施實施的同時，加強個人安全防護工作。4、混凝土防護覆蓋物、塑料養(yǎng)生桶必須綁扎牢靠整齊，養(yǎng)護期間進行檢查和修補。防止有縫隙或破洞形成灌風口，造成事故。5、在澆筑完成后，12h以內(nèi)應進行養(yǎng)護；砼強度未達到1.2Mpa以前，嚴禁任何人在上面行走、安裝模板支架，更不得作沖擊性或上面任何劈打的操作。附圖：橋墩養(yǎng)護涵洞養(yǎng)護交底人： 簽收人： 簽收日期：編制本施工方案時，分析了本工程的工程特點，地質(zhì)條件和設(shè)計要求，結(jié)合我公司其它工地施工經(jīng)驗及教訓，本著創(chuàng)一流的質(zhì)量Electr

22、icity lines, equipment inspections, found hidden in time for rectification, 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. 1

23、0, live on campus faculty members, must lead by example, and educate families 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 qual

24、ified, and annual testing of pressure vessels, to regularly check, the canteen 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

25、, until investigated for legal responsibility. Song Lin Xiang Liu Jia ping 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, cult

26、ural events and other aspects, integrated governance shall obtain wide support 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 ta

27、ke the initiative to contact the district police station, the village Committee, 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 environmenta

28、l inspections near the campus, found that the jobless migrants from rural 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 befor

29、e school, teachers remind students, pay attention to traffic safety. 5, 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 es

30、tablishment of emergency rescue teams of teachers in schools, on high alert 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